60results about How to "Stable current and voltage" patented technology

The invention discloses an energy-saving current voltage stabilization auxiliary system for an oxyhydrogen machine. The energy-saving current voltage stabilization auxiliary system for the oxyhydrogen machine comprises a backup battery, a charge and discharge management circuit board and a relay, wherein the charge and discharge management circuit board is connected with the oxyhydrogen machine through the relay, and is respectively connected with the backup battery and a built-in battery of running equipment. The energy-saving current voltage stabilization auxiliary system is reasonable in structure layout, and is capable of lastingly providing a working power supply to the oxyhydrogen machine; the power supply current voltage is stable; the working stability of the hydrogen-oxygen generator is effectively ensured; hydrogen and oxygen with constant flow are provided for an engine of the running equipment, thus normal working of the engine is ensured; the reliability is high; the power of the engine is effectively improved; fuel oil is saved; the energy-saving current voltage stabilization auxiliary system is energy-saving and environment-friendly; meanwhile, the service life of the built-in battery of the running equipment is greatly prolonged; normal operation of the running equipment is ensured; in addition, the energy-saving current voltage stabilization auxiliary system is simple in overall structure, easy to achieve, beneficial to wide popularization and application, and suitable for running equipment, such as saloon cars, buses, trucks and steamships of fuel oil, natural gas and the like.

The invention discloses a new energy vehicle charging gun with a safety protection function and a new energy vehicle. The charging plug comprises a gun barrel, a charging plug, two pressing handles, adriving rod mechanism, a pull-back spring and two plugging and unplugging mechanisms. The charging plug is arranged in the first end of the gun barrel in a sliding mode, two clamping protrusions areoppositely arranged on the outer circumferential wall of the charging plug, and a charging starting switch is arranged on at least one clamping protrusion; the first end of each pressing handle is rotatably connected to the outer peripheral wall of the gun barrel; the driving rod mechanism is used for driving the charging plug to extend out of the gun barrel or retract into the gun barrel; the pull-back spring is arranged in the gun barrel, the first end of the pull-back spring is connected to the charging plug, and the second end is connected to the gun barrel; the two plugging and unpluggingmechanisms each comprise a plugging and unplugging rod and a reset spring which are arranged in the gun barrel in a sliding manner, the first end of the plugging and unplugging rod is arranged towards the charging plug, the reset spring sleeves the plugging and unplugging rod, and the second end of the plugging and unplugging rod penetrates through and is exposed out of an end cover under the action of the reset spring; the second end of each pressing handle is provided with a clamping jaw used for being clamped on a corresponding column barrel. The charging gun has excellent safety protection performance.

The present invention provides a metal fuel battery comprising a plurality of battery cells connected in turn in series, the battery cell comprises a battery casing, air electrode sheets, a zinc sheetand an electrolyte; the battery casing is hollow structure, the zinc sheet is disposed inside the battery casing, the air electrode sheets are disposed inside the battery casing and on both sides orone side of the zinc sheet, and one sides, facing away from the side of the zinc sheet, of the air electrode sheets are connected with the outside, the electrolyte is filled between the air electrodesheets and the zinc sheet, and the air electrode sheets and the zinc sheet are respectively connected with wires. The metal fuel battery has stable performance and is capable of stably discharging byarrangement of the zinc sheet as a battery negative electrode. Through arrangement of the air electrode sheets as a positive electrode of the battery, the cost is low, the overall structure is simple,voltage and current are stable, and the metal fuel battery t is environmentally friendly and non-pollution.

The invention discloses a chlorine-magnesium fuel cell which comprises a cell body, a chlorine storage gasification system and an electrolyte circulation regeneration system. The electrolyte circulation regeneration system comprises a filter, an extraction stirrer, a water purifier, a standing device and an electrolyte storage tank, the electrolyte storage tank is communicated to the outer side ofthe standing device, and a second power pump is mounted in the outer side of the electrolyte storage tank. The cell body comprises a cell casing and a chlorine channel, the cell casing is internallyprovided with a cathode film assembly, the cathode film assembly is internally provided with a magnesium alloy positive plate, and a cell middle axle is fixedly to the inner middle of the cell casing.The chlorine-magnesium fuel cell uses multi-component magnesium alloy with high performance as the anode, the electrochemical conversion rate is high, electrochemical reaction is uniform, and the current and voltage are stable; and chlorine serves as an oxidizing agent, the electrode potential is high, the cost is lower, and the energy density is high.

The invention discloses an automatic water adding control system for a humidifier based on a voltage-stabilization-type rectifier and filter circuit. The system is characterized in that the system is mainly formed by a central processor, an A / D converter, a preset value storage unit, an automatic water adding control circuit, a displayer, a power source, a water level sensor, a solenoid valve, a rectifier and filter circuit and a power source voltage regulator circuit, wherein the A / D converter, the preset value storage unit, the automatic water adding control circuit, the displayer and the power source are connected with the central processor; the water level sensor is connected with the A / D converter; the solenoid valve is connected with the automatic water adding control circuit; the rectifier and filter circuit is connected in series between the power source and the water level sensor; and the power source voltage regulator circuit is connected in series between the power source and the automatic water adding control circuit. The automatic water adding control system is not only simple in structure, but also low in cost; the water supply solenoid valve can be opened through the automatic water adding control circuit when the water in the humidifier is not sufficient enough, so that automatic water adding is realized, and fault and waste of electrical energy due to working of the humidifier under no water condition are prevented; and the system is suitable for wide application.

The invention discloses a zinc air battery. The zinc air battery comprises a first case, a second case and a battery main body, wherein the first case is provided with a hollow cavity for accommodating the battery main body, the second case is connected with the first case in a sealing manner to seal the battery main body; an opening part is formed in at least one side surface of the first case and is provided with a semipermeable membrane, and a gas molecule can permeate the semipermeable membrane, but a water molecule cannot permeate the semipermeable membrane. The provided zinc air battery is provided with the semipermeable membrane, the semipermeable membrane allows the gas molecule to get through but stops the water molecule, water in the first case is prevented from permeating through the first case, or the water molecule in the air is prevented from entering the first case, so that the safety performance of the zinc air battery and the quality are improved; and the zinc air battery is simple in structure, convenient in installation and convenient in use.

The invention discloses an oscillation suppression method and a system based on a selective virtual harmonic resistor, and the method comprises the following steps: constructing an instability suppression system based on the selective virtual harmonic resistor according to a selective virtual harmonic resistor suppression strategy and a direct-current side equivalent circuit of a subway traction transmission system; according to the constructed characteristic equation based on the instability suppression system based on the selective virtual harmonic resistor, and a system asymptotic stabilitycriterion, calculating to obtain a voltage compensation parameter under a synchronous rotating coordinate system meeting a stability criterion condition; and inputting the calculated voltage compensation parameters under the synchronous rotating coordinate system into a compensation link of the subway traction transmission system, thereby suppressing the instability oscillation of the direct current side. According to the method, a vibration suppression strategy based on the selective virtual harmonic resistor is adopted, compensation parameters are introduced, and the compensation parametersenable the system to just meet the stability criterion condition of a characteristic equation, so that instability oscillation can be effectively suppressed, and the stability of the system is improved.

The invention discloses an energy-saving type waste tire cutting device which comprises a first motor box, a second motor box, a fixing device, a cutting device and energy-saving control boxes, wherein the second motor box is arranged above the first motor box; energy-saving control boxes are arranged on the first motor box and the second motor box; the energy-saving control boxes are internally provided with variable voltage stabilizers, microprocessors, programming units, electromagnetic voltage regulation balancers and power supplies; the power supplies are used for supplying power to the motor boxes; the fixing device is arranged on the right side of the first motor box and is used for fixing a tire; the cutting device is arranged on the right side of the second motor box and is used for cutting the tire. The energy-saving type waste tire cutting device can cut two surfaces of the tire simultaneously, so that the working efficiency is greatly improved; the energy-saving type waste tire cutting device is applicable to the tires of different models and is relatively wide in application range; due to the energy-saving control boxes, the current and the voltage of the motors can be stabilized, the cutting device can cut at a uniform set speed, the electric energy is saved, and the production security is improved.

The invention discloses a novel sound box. The novel sound box comprises a box body. A power supply driving circuit, an audio playing circuit, a control circuit and an LED lamp circuit are arranged in the box body. The power supply driving circuit comprises an electromagnetic filtering circuit. The electromagnetic filtering circuit is successively connected with a bridge rectifying circuit, an inverting circuit, an output rectifying circuit and an output filtering circuit. A high frequency voltage transformation circuit is connected with a sampling circuit. The output filtering circuit is connected with the LED lamp circuit. The audio playing circuit comprises an audio power amplifying circuit connected with the output filtering circuit. The audio power amplifying circuit is connected with a loudspeaking circuit. The control circuit comprises a controller. The controller is connected with the bridge rectifying circuit controlled through a feedback signal of the sampling circuit, the LED lamp circuit and an audio power amplifier. According to the invention, the damage of the sound box in an operating process is reduced effectively, and the service life of the controlled through a feedback signal of the sampling circuit box is prolonged.

The invention relates to an emergency charger of a dry battery Usb jack mobile phone, comprising a shell, a dry battery, a circuit board and a charging jack; the dry battery and the circuit board are arranged in the shell, and the input end of the circuit board is connected with the anode and cathode of the dry battery, and the output end thereof is connected with the anode and cathode of the charging jack; the circuit board is provided with a voltage boosting chip, and the charging jack is a standard Usb jack. In the invention, the charging current is stable, and the charging effect is good, thus being completely in accordance with the charging requirements of the mobile phone battery; the usage of the Usb jack is in accordance with the unity requirement of future mobile phone interface; the charger has simple structure and low cost and is suitable for being emergently charged by various mobile phones.

The invention discloses a double closed loop control direct-current speed regulation system based on linear driving. The double closed loop control direct-current speed regulation system based on linear driving is characterized by being composed of a transformer T, a rectification filter circuit, a double closed loop control circuit connected with the output end of the rectification filter circuit, a fine adjustment circuit connected with the double closed loop control circuit, a linear driving circuit connected with the secondary side of the transformer T, a voltage stabilizing circuit connected with the linear driving circuit, an operational amplification circuit connected with the output end of the voltage stabilizing circuit, and an output circuit connected with the output end of the operational amplification circuit, both the double closed loop control circuit and the fine adjustment circuit are connected with the primary side of the transformer T, the liner driving circuit is composed of a driving chip U2, a triode VT3, a triode VT4, a triode VT5, a triode VT6, a polar capacitor C10 and the like, the positive electrode of the polar capacitor C10 is connected with a dotted terminal of an inductance coil L of the secondary side of the transformer T, and the negative electrode of the polar capacitor C10 passes through a resistor R16 and then is connected with an IN1 pin of the driving chip U2. According to the double closed loop control direct-current speed regulation system based on linear driving, due to the fact that the linear driving circuit is adopted, the speed regulation system is made more stable.

The invention discloses an electric vehicle controller and an electric vehicle, belongs to the technical field of electric vehicles, and aims to solve the problems that a flexible rubber piece in an existing controller is inconvenient to machine and the like. The electric vehicle controller comprises a heat dissipation shell with a containing cavity, wherein a base plate, a control assembly, a soft rubber piece and a fixed bottom plate are sequentially arranged in the containing cavity, the fixed bottom plate is connected to the heat dissipation shell through a fastener, a columnar or frustum-shaped jacking boss is arranged on the soft rubber piece, the jacking boss comprises a boss top surface protruding out of the upper surface of the soft rubber piece and a boss bottom surface protruding out of the lower surface of the soft rubber piece, the boss top surface abuts against the control assembly, the boss bottom surface abuts against the fixed bottom plate, and the fixed bottom plate can push and press the jacking boss to enable the control assembly to be tightly attached to the heat dissipation shell after installation. According to the electric vehicle controller and the electricvehicle, the heat dissipation efficiency of the control assembly is improved, and the heat dissipation effect of the whole controller is good.

The invention relates to the field of electrode foil, and discloses a current sharing control device and method for formation of corroded aluminum foil. The current sharing control device for formation of the corroded aluminum foil comprises a rack; a guide assembly, a conductive roller rotatably installed on the rack, and a conductive frame which is installed on the rack and connected with a negative electrode of a formation power supply are sequentially arranged on the rack; the conductive roller is connected with a positive electrode of the formation power supply, and the bottom end of the conductive frame extends into formation liquid in a formation tank; and an electric adjusting assembly used for adjusting vertical lifting of the conductive roller is installed on the rack, a current detection module connected between the conductive roller and the formation power source and a controller electrically connected with the current detection module are further arranged on the rack, the current detection module detects current signals, and transmits the current signals to the controller, and the controller is used for driving the electric adjusting assembly according to change of the received current signals. The current sharing control device and method for formation of the corroded aluminum foil have the effect of stabilizing currents during electrolytic formation of the aluminum foil.

The invention discloses a wind power generating device and method. The wind power generating device comprises wind blades, a gearbox, an air compressor, a compressed air storage tank and a generator unit. The wind blades are connected to the gearbox through a connecting shaft, the gearbox drives the air compressor to compress the air, the air compressor comprises an air outlet connected to the compressed air storage tank, and the compressed air supplied by the compressed air storage tank is used for power generation through the generator unit. By the aid of the wind power generating device and method, continuous power generation can be implemented, the voltage is stable, and cost is low.

The invention relates to a switching power supply circuit capable of detecting a current. The circuit comprises a current detection circuit, a logic control circuit and a switching power supply main circuit. The input end of the current detection circuit is electrically connected with the output end of the switching power supply main circuit; the output end of the current detection circuit is electrically connected with one signal input end of the logic control circuit, a CPU control signal is accessed to the other signal input end of the logic control circuit, and the output end of the logiccontrol circuit is electrically connected with the input end of the switching power supply main circuit. According to the invention, the current detection circuit collects a current signal outputted by the switching power supply main circuit, and logic comparison is carried out on the current signal and a CPU control signal through a logic control circuit; therefore, a logic level signal is outputas a control signal for controlling the switching power supply main circuit so as to control the working state of the switching power supply main circuit, thereby avoiding the overvoltage and overcurrent phenomena of the whole switching power supply circuit. The whole circuit is low in energy consumption, high in detection precision and stable in power supply.

The invention discloses a pulse detection sensor based on linear driving. The pulse detection sensor based on linear driving is mainly composed of a sensor body, a main control chip K, a rectifying circuit connected with the main control chip K, and a pulse detection circuit connected with the sensor body. The pulse detection sensor based on linear driving is characterized in that a linear driving circuit is arranged between the pulse detection circuit and the rectifying circuit and is composed of a driving chip U, a triode VT3, a triode VT4, a triode VT5, a triode VT6, a polar capacitor C6, a resistor R10 and the like, the positive electrode of the polar capacitor C6 is connected with the pulse detection circuit, the negative electrode of the polar capacitor C6 passes through a resistor R9 and then is connected with an IN1 pin of the driving chip U, one end of the resistor R10 is connected with the collector electrode of the triode VT6, and the other end of the resistor R10 passes through a resistor R11 and then is connected with the base electrode of the triode VT3. According to the pulse detection sensor based on linear driving, due to the fact that the linear driving circuit is arranged, it can be guaranteed that the sensor is prevented from being disturbed when used for detecting pulse error signals.

The invention discloses a power grid energy-saving constant current drive control system based on emitter coupled amplification. The system is composed of an EMI single-phase filter, a silicon controlled rectifier, a boosting type power factor correcting circuit, a single-phase high-frequency frequency converter, a sampling protection circuit connected with the single-phase high-frequency frequency converter, a single-chip microcomputer, a band-pass filtering low-distortion oscillating circuit and a boosting type constant current driving circuit. The system is characterized in that an emitter coupled amplification circuit is also connected between the sampling protection circuit and the single-chip microcomputer in series; the boosting type constant current driving circuit is adopted, has the functions of under-voltage locking protection, over-voltage protection and over-temperature protection, has extremely high driving stability, and can effectively improve the accuracy of the control system; meanwhile, the emitter coupled amplification circuit is adopted and has a stable quiescent operating point, stable output current and high input resistance, and the energy-saving effect of the system is effectively improved.

A micropower generator includes two bases, a housing, a power generating assembly and a rotating shaft disposed within the housing, the two bases are respectively sealingly connected with the upper and lower ends of the shell, The power generation assembly comprises a magnetic rotating assembly and an induction power generation assembly. The magnetic rotating assembly is arranged at one end of therotating shaft and can rotate together with the rotating shaft. The induction power generation assembly is arranged at a center position of the corresponding motor assembly close to the correspondingbase side, and the induction power generation assembly is fixedly connected with the corresponding base inner wall. A micro power generation device according to the present invention, A magnetic rotate assembly is powered by an external power supply to form a rotating magnetic field, so that rotational torque is generated, The rotating shaft drives the whole magnetic rotating assembly to rotate relative to the induction power generation assembly, the induction power generation assembly generates induced current and outputs to the outside, and only a small starting current voltage can drive the magnetic rotating assembly to rotate, the whole device is small in volume and large in power, and the over-excitation phenomenon generated when the generator transmits energy externally is solved.

The invention discloses a linear drive based two-stage low-pass filtering and amplification LED voltage stabilizing system. The linear drive based two-stage low-pass filtering and amplification LED voltage stabilizing system mainly comprises a voltage transformation circuit, a two-stage low-pass filtering and amplification circuit connected with the voltage transformation circuit, a voltage stabilizing circuit connected with the two-stage low-pass filtering and amplification circuit and an output circuit connected with the output end of the voltage stabilizing circuit and is characterized by further comprising a linear drive circuit connected with the voltage transformation circuit and the two-stage low-pass filtering and amplification circuit simultaneously. The linear drive circuit consists of a drive chip U1, an audion VT5, an audion VT6, an audion VT7, an audion VT8, a polar capacitor C13 and the like, wherein the positive pole of the polar capacitor C13 is connected with the voltage transformation circuit, the negative pole of the polar capacitor C13 is connected with the IN1 tube pin of the drive chip U1 through a resistor R12. The output power of the linear drive based two-stage low-pass filtering and amplification LED voltage stabilizing system can be amplified by means of the linear drive circuit, and the system can meet more LED simultaneous usage demands.

The invention relates to an independent system circulating power generation and energy storage device which has the connecting way of a storage battery (1)- a charge-discharge controller unit (2)- a driving motor (3)- a connector (4)- a reduction gear (5)- a connector (6)- a speed-increasing gearbox (7)- a connector (8)- a cross planetary connecting shaft (9)- an electric generator (10)- a voltage rectifier control unit (11)- a grid connection terminal and user terminal (12). The device has wide application scope, can be merged into power network and can directly and independently supply power for the user; the device shows the essence of green electricity in deed, does not need to select geographical environment, is low in manufacturing cost and easy to manage and maintain, and also can be installed on various land and water vehicles to be taken as a power source; the generated voltage is stable and reliable without flash and harmonic wave phenomena, and the device has the remarkable advantage of constant speed synchronous power generation.

The invention discloses a control platform for automatic detection, and the structure of the control platform comprises a human-computer interface, a data display meter, a voltmeter panel, an industrial control console, an integrated control cabinet, an angular distance relay wheel seat, and a start-stop button plate. According to the invention, theintegrated control cabinet is cooperated with the angular distance relay wheel seat, a relay base and a disc rack frame shell can be manually and automatically clamped and cushioned through a power-on regulation terminal of the integrated control cabinet, so that the hoisted and rotated rack is matched with electric signal control, and an annular surface adaptive counterweight armature rack and shock insulator cap rib rack pressure jacking and rotating operation effect is achieved; the pull rod angular distance is pulled to form an included angle of a coordinate axis to operate and hoist a mechanical support stretching molding material in a matched mode, the automatic hardness linkage detection and ductility turning operation effect is guaranteed, a worker has the true mechanical regulation operation hand feeling, a synchronous regulation effect is achieved through power distribution conveying, autonomy and manual shearing of a machine body are flexible, and the strcict operation effect of the automatic detection assembly line on the whole molding material is improved.

The invention discloses an MOS transistor radiating structure and an electric vehicle controller. The MOS transistor radiating structure comprises a radiating shell, a PCB, a snap spring elastic sheet and an insulating layer, wherein the radiating shell adopts a hollow structure; a polygonal cavity formed by multiple mounting planes is formed in the radiating shell; the PCB is arranged in the cavity of the radiating shell; the PCB is set to be polygonal for being matched with the cavity of the radiating shell; at least an MOS transistor is arranged on the edge of each side of the PCB; the snap spring elastic sheet is arranged on the inner sides of the MOS transistors and is set to be a polygonal structure for being matched with a region encircled by all the MOS transistors, wherein an opening is formed in the polygonal structure of the snap spring elastic sheet; multiple elastic sides are arranged on each side of the snap spring elastic sheet at intervals; and the insulating layer is arranged between the MOS transistors and the mounting planes. The MOS transistor radiating structure and the electric vehicle controller have the advantages of compact structure, small volume, convenient installation, high radiating efficiency and the like.

The invention discloses a three-level signal amplified power voltage stabilizing type automatic control air changing system. The three-level signal amplified power voltage stabilizing type automatic control air changing system is characterized by being mainly composed of a programmable controller, a voltage stabilization rectifier circuit, an A / D converter, a memorizer, an air changing control circuit, a power source, a three-level signal amplifier circuit, an air quality sensor and an air changing device, wherein the voltage stabilization rectifier circuit, the A / D converter, the memorizer and the air changing control circuit are connected with the programmable controller, the power source is connected with the voltage stabilization rectifier circuit, the output end of the three-level signal amplifier circuit is connected with the A / D converter, the air quality sensor is connected with the input end of the three-level signal amplifier circuit, and the air changing device is connected with the air changing control circuit. The three-level signal amplified power voltage stabilizing type automatic control air changing system is simple in structure and low in cost, the programmable controller can judge whether the air changing device needs to be started or not according to indoor air quality signals collected by the air quality sensor, and therefore the air changing device can stop working when the indoor air quality is good, the purpose of automatic air changing according to the environment peculiar smell production situation can be achieved, and the three-level signal amplified power voltage stabilizing type automatic control air changing system is suitable for application and popularization.

The invention discloses an energy-saving current voltage stabilization auxiliary system for an oxyhydrogen machine. The energy-saving current voltage stabilization auxiliary system for the oxyhydrogen machine comprises a standby battery, a charge voltage stabilization circuit, a detection switching circuit and an output voltage stabilization circuit. The energy-saving current voltage stabilization auxiliary system is reasonable in structure layout, and is capable of simultaneously charging and discharging; excessive generating capacity of a running equipment generator is supplied to a hydrogen-oxygen generator and replenished to the standby battery with stable current voltage; when the generating capacity is not enough, a working power supply is lastingly provided for the hydrogen-oxygen generator by automatically switching into the standby battery, and the power supply current voltage is stable, so that the working stability of the hydrogen-oxygen generator is effectively ensured; hydrogen and oxygen with constant flow are provided for an engine of running equipment; the reliability is high; the power of the engine is effectively improved; fuel oil is saved; the energy-saving current voltage stabilization auxiliary system is energy-saving and environment-friendly; meanwhile, the service life of a built-in battery of the running equipment is prolonged; normal operation of the running equipment is ensured; the energy-saving current voltage stabilization auxiliary system is wide in application range, can be applied to running equipment, such as saloon cars, buses, trucks and steamships with fuel oil, natural gas and the like.

The invention discloses an automatic water adding control system for a humidifier based on a rectifier type differential amplification circuit. The automatic water adding control system is characterized by mainly comprising a central processing unit, an A / D converter, a preset value storage unit, an automatic water adding control circuit, a display, a power supply, the differential amplification circuit, a water level sensor, a rectifying and filtering circuit and an electromagnetic valve, wherein the A / D converter, the preset value storage unit, the automatic water adding control circuit, the display and the power supply are connected with the central processing unit; the differential amplification circuit is connected with the A / D converter; the water level sensor is connected with the differential amplification circuit; the rectifying and filtering circuit is serially connected between the power supply and the water level sensor; and the electromagnetic valve is connected with the automatic water adding control circuit. The automatic water adding control system not only is simple in structure, but also is low in cost; the water supply electromagnetic valve further can be opened through the automatic water adding control circuit when water in the humidifier is insufficient, so that automatic water adding is realized, the circumstance that the humidifier works under an condition of running out of water in the humidifier to cause faults and meanwhile waste electrical energy is prevented, and the automatic water adding control system is suitable to be popularized and used.

The invention relates to a motor energy-saving rectification overheating delay protection self-locking device, belongs to the technical field of motor energy-saving rectification overheating delay protection self-locking devices, and provides a motor energy-saving rectification overheating delay protection self-locking device capable of stably supplying power and accurately controlling the stop and self-locking of a motor due to overheating. A technical solution for solving the technical problem is characterized in that the other end of a stop button TA1 is successively connected in parallel with one end of the normally open contact CJ1.3 of an AC contactor CJ1, one end of the delayed closed contact SJ1.2 of a time relay SJ1, one end of the normally open contact ZJ1.3 of an intermediate relay ZJ1, and one end of the normally closed contact CJ1.4 of an AC contactor CJ1, and then is connected with one end of a start button QA1; the other end of the start button QA1 is successively connected in parallel with the other end of the normally open contact CJ1.3 of the AC contactor CJ1, one end of an indicator lamp XHD1, and one end of the normally open contact RJ1.2 of a thermal relay RJ1,and then is connected with one end of the coil CJ1.1 of the AC contactor CJ1. The motor energy-saving rectification overheating delay protection self-locking device is installed and used in a motor control protection device.

The invention discloses an emitter coupling type amplification-based oscillation drive control system of an energy-saving power grid. The system comprises an EMI single-phase filter, a silicon controlled rectifier connected with the EMI single-phase filter, a boost-type power factor correcting circuit connected with the silicon controlled rectifier, a single-phase high-frequency inverter connected with the boost-type power factor correcting circuit, a sampling protection circuit connected with the single-phase high-frequency inverter, a single-chip microcomputer connected with the sampling protection circuit, and a band-pass filtering low-distortion oscillating circuit in tandem connection between the boost-type power factor correcting circuit and the sampling protection circuit. The system is characterized in that a loss suppression circuit is in tandem connection between the sampling protection circuit and the single-chip microcomputer. The loss suppression circuit is capable of preventing the current intensity from being weakened during the current transmission process. Meanwhile, the band-pass filtering low-distortion oscillating circuit is strong in controllability, and stable in current and other performances. Therefore, the energy-saving effect and the security of the system are effectively improved.