40results about How to "Realize the soft start function" patented technology

The invention discloses a two-way boost-buck circuit for a storage battery energy-storage system and a digital control method thereof. The two-way boost-buck circuit consists of an energy storage inductor LP, a power tube Sbuck, a power tube Sboost, a snubber capacitor Cs, a resonant inductor Lr, a resonant capacitor Cr and a diode. A control device includes a control core, a drive circuit, a sampling circuit, an upper computer and an LCD display screen. The control core obtains the voltage, current, and output voltage of the storage battery set, the voltage of the snubber capacitor Cs, and the voltage of the power tube Sbuck by the sampling circuit; on the basis of a corresponding control algorithm, a drive wave form is outputted by the drive circuit so as to drive the power tube Sbuck and the power tube Sboost; the control core sends the voltage and the current of the storage set to the LCD display screen; the upper computer collects all variable values of the current working situation from the control core and the values are displayed by upper computer software; and the upper computer also can send a control command to the control core. According to the invention, the provided circuit and method can be applied to the storage battery energy storage system and two-way electric energy flowing can be realized well.

The invention relates to a mechanism transmission device, in particular to an interaxial permanent magnet coupling mechanism used for transmitting torque between two axes of rotation. The mechanism comprises a permanent magnet rotor and a conductor rotor, which are arranged coaxially, wherein permanent magnets and conductors are distributed on the permanent magnet rotor and the conductor rotor respectively; the permanent magnet rotor and the conductor rotor are of a disc structure; the end faces of the permanent magnet rotor and the conductor rotor are opposite and form an air gap; the permanent magnets on the permanent magnet rotor are distributed along the circumference; magnetizers made of permeability magnetic materials are put between the adjacent permanent magnets; the magnetic pole directions (directions of lines connecting S poles and N poles) of the permanent magnets are in the circumferential direction of the permanent magnet rotor; and the magnetic pole directions of the adjacent permanent magnets are opposite or reverse. The mechanism can transmit bigger torque, can adjust the transmitted torque, has compact structure and low requirement for installation precision and is stable in transmission and adjustment.

The invention discloses a soft starting valve which comprises a valve body with an inlet and an outlet; a valve port and a valve core which are opposite are arranged in the valve body, the upper surface of the valve core is connected with a valve rod which can slide up and down in a valve rod guide sleeve; a chamber is arranged in the valve body, a valve cover is arranged on the top of the valve body, the bottom surface of the valve cover is in sealed connection with the valve body and the valve rod guide sleeve; a piston cylinder is arranged in the valve cover, a piston with a piston rod is arranged in the piston cylinder, and the lower end of the piston rod is connected with the valve rod; a first throttling passage is communicated between the chamber and the inlet, a second throttling passage is communicated between the chamber and the top of the piston cylinder, and a third throttling passage is communicated between the top of the piston cylinder and the outlet. The valve body blank parts, the lower end cover, the valve core and other sealing components in the general pressure-reducing valve can be utilized for the soft starting valve product of the invention, therefore, new molds are not needed and the production cost is reduced greatly.

The invention relates to a mechanism transmission device, in particular to an interaxial permanent magnet coupling mechanism used for transmitting torque between two axes of rotation. The mechanism comprises an inner permanent magnet rotor and an outer permanent magnet rotor, which are arranged coaxially, wherein the outer permanent magnet rotor is shaped like a cylinder; the inner permanent magnet rotor is arranged in the inner cavity of the outer permanent magnet rotor; inner permanent magnets and outer permanent magnets are distributed on the inner permanent magnet rotor and the outer permanent magnet rotor respectively; an air gap is formed between the inner permanent magnet rotor and the outer permanent magnet rotor; a plurality of inner permanent magnets on the inner permanent magnet rotor are distributed along the circumference; inner magnetizers made of permeability magnetic materials are put between the adjacent inner permanent magnets; the magnetic pole directions of the inner permanent magnets are in the circumferential direction of the inner permanent magnet rotor; and the magnetic pole directions of the adjacent inner permanent magnets are opposite or reverse. The mechanism can transmit bigger torque, can adjust the transmitted torque, has compact structure and low requirement for installation precision and is stable and reliable in transmission and adjustment.

The invention discloses a PWM controller applied to a switching type voltage stabilizer, which comprises an error amplifier, a soft-start control circuit, a compensation load and a comparator, wherein, the error amplifier receives a voltage reference and a feedback voltage and outputs an error current signal hereby; the soft-start control circuit outputs a compensating current signal according toat least a soft-start control signal; the compensation load receives the error current signal and the compensating current signal and outputs a compensating signal; the comparator receives a ramp signal and the compensating signal and outputs a PWM signal; the error amplifier compensates according to the presetting soft-start compensating current when the power supply voltage is increased, and slowly charges a circuit common-ground VSS so as to lead the error signal to promote slowly until the soft-start control cycle comes to an end, thereby serving the soft-start function when the power supply voltage is increased.

The invention relates to a mechanism transmission device, in particular to an inter-shaft permanent magnet coupling mechanism used for transmitting torque between two rotating shafts. The mechanism comprises a permanent magnet rotor and a conductor rotor which are arranged coaxially, wherein permanent magnets and conductors are respectively distributed on the permanent magnet rotor and the conductor rotor; an air gap is formed between the permanent magnet rotor and the conductor rotor; the permanent magnets on the permanent magnet rotor are distributed along the circumference; magnetizers made of permeability magnetic materials are put between adjacent permanent magnets; the magnetic pole directions of the permanent magnets are positioned in the circumferential direction of the permanent magnet rotor; and the magnetic pole directions of adjacent permanent magnets are opposite or reverse. The mechanism can transmit large torque, can adjust the transmitted torque, has a compact structure, is convenient to install, and is stable and reliable in transmission and adjustment.

The invention provides a soft-start circuit and a DC-DC circuit which includes the soft-start circuit. In the DC-DC circuit, output of a pulse-width modulation comparator is controlled through an error amplifier so that a stable output voltage can be output at last. At the same time, in the soft-start circuit, a reference-source voltage output by the soft start is controlled through a switch capacitance-resistance circuit so that the reference-source voltage rises slowly and becomes stable as a reference voltage at last and a DC-DC output voltage is enabled to rise slowly with the reference-source voltage output by the soft start so that generation of an overshoot voltage in a start process is prevented and a soft-start function is realized and thus the circuit is protected better.

The invention relates to an inter-shaft permanent magnet coupling mechanism used for transmitting torque between two rotating shafts. The mechanism comprises two coaxial permanent magnet rotors in disk structures, wherein permanent magnets comprise main magnets and auxiliary magnets; a plurality of main magnets are distributed along the circumference, magnetizers made of permeability magnetic materials are put between adjacent main magnets, and one auxiliary magnet is arranged on the side, far from a gap, of each magnetizer; the magnetic pole directions of the main magnets are positioned on the circumferential directions of the permanent magnet rotors, and the magnetic pole directions of adjacent main magnets are opposite or reverse; the magnetic pole directions of the auxiliary magnets are vertical to the end faces of the permanent magnet rotors, and the magnetic pole directions of adjacent auxiliary magnets are opposite; and the magnetic poles on the sides on which two adjacent main magnets and one auxiliary magnet are in contact with the same magnetizer have the same polarity. The mechanism can transmit larger torque, can adjust the transmitted torque, has compact structure and low requirement for installation precision, and is stable and reliable in transmission and adjustment.

The present invention relates to a special-purpose cleaning machine for microporous ceramic filtering plate of ceramic filter. It includes shell body, cleaning channel set on said shell body, ultrasonic transducers and washing device. In the cleaning channel interior a ceramic filtering plate positioning frame is set, its bottom portion is equipped with fluid-discharging tube, the ultrasonic transducers are respectively mounted at two sides of said cleaning channel. The washing device is formed from internal circulating pipeline and circulating pump mounted on the internal circulating pipeline. Said invention utilizes ultrasonic wave and chemical cleaning agent to clean filtering plate, so that it can prolong the service life of ceramic filtering plate.

The invention discloses an intelligent motor power saver. The intelligent motor power saver comprises a direct-current voltage stabilizing circuit, a pulse width modulation circuit, a half-bridge driver circuit and a high-frequency isolation transformer circuit; the direct-current voltage stabilizing circuit comprises a transformer T1, a bridge rectifier circuit, a filter capacitor C1, a current-limiting resistor R2 and a voltage stabilizing diode D5; the pulse width modulation circuit comprises a chip TL494 CN; the pin 8 of the chip TL494 CN is connected to the anode of the voltage stabilizing diode D5; the pin 9 and the pin 10 of the chip TL494 CN serve as driving signal output ends; the half-bridge driver circuit comprises a field-effect tube Q1 and a field-effect tube Q2; the pole G of the field-effect tube Q1 is connected with the pin 9 of the chip TL494 CN, the pole G of the field-effect tube Q1 is connected with the pin 10 of the chip TL494 CN, and the pole D of the field-effect tube Q1 and the pole D of the field-effect tube Q2 are connected with the input end of the high-frequency isolation transformer circuit, respectively.

The invention belongs to the technical field of solar energy utilization, and particularly relates to a non-storage-battery portable photovoltaic direct-driven refrigerator system with the compressor rotation speed varying with irradiation. The non-storage-battery portable photovoltaic direct-driven refrigerator system comprises a photovoltaic cell panel, a solar irradiation sensor, a DC voltage transmitter and a DC variable-frequency refrigerator, wherein the photovoltaic cell panel is connected with a compressor controller; the solar irradiation sensor and the DC voltage transmitter are combined into a compressor speed adjusting signal generation module; after being connected with a temperature controller in series, the compressor speed adjusting signal generation module is connected with the compressor controller; and the output interface of the compressor controller is connected with a DC variable-frequency compressor. Compared with the prior art, the non-storage-battery portable photovoltaic direct-driven refrigerator system provided by the invention has the following advantages: the problem that a compressor frequently starts and stops when the solar irradiation strength varies relatively greatly can be solved; the compressor rotation speed can be adjusted according to the irradiation signal strength; the law of energy supply and demand in an independent photovoltaic system can be met; the energy utilization ratio and the refrigeration efficiency are higher; and the demand for rapid refrigeration by using a photovoltaic refrigerator in the open air can be met.

The invention belongs to the technical field of solar utilization, and particularly relates to a portable photovoltaic direct drive refrigerator system with a thermoelectric self-adaption cooling assembly. The portable photovoltaic direct drive refrigerator system comprises a photovoltaic power generation assembly, the thermoelectric self-adaption cooling assembly and a direct-current refrigerator assembly. The photovoltaic power generation assembly comprises a photovoltaic battery panel, a direct-current fuse and a maximum power tracing module. The thermoelectric self-adaption cooling assembly comprises a thermoelectric power generation piece and a direct-current fan which are mutually connected. The direct-current refrigerator assembly comprises a refrigerator body, a direct-current inverter compressor, a direct-current compressor controller and a temperature controller. By additionally arranging the thermoelectric self-adaption cooling assembly, the portable photovoltaic direct drive refrigerator system adjusts the rotating speed of the fan inside in a self-adaption manner to assist content in rapid cooling, cooling capacity can be transferred in time, and the scene requirements of outdoor use are met better. The system can use the maximum power for adjusting the rotating speed of the compressor according to the photovoltaic panel, the energy utilization rate of the system is higher, the refrigeration rate is higher, and the requirement for rapid refrigeration with the photovoltaic refrigerator outdoors is met.

The invention discloses an intelligent power saver for motors, comprising: a direct current voltage stabilizing circuit, a pulse width modulation circuit, a half-bridge drive circuit and a high frequency isolation transformer circuit. The direct current voltage stabilizing circuit contains a transformer, a bridge rectifier circuit, a filter capacitor, a current limiting resistor and Zener diode. The pulse width modulation circuit includes a chip TL494CN, whose pin 8 is connected with the anode of the Zener diode, and whose pin 9 and pin 10 serve as the output end of a drive signal. The half-bridge drive circuit includes a first field effect transistor and a second field effect transistor. The G pole of the first field effect transistor is connected with the pin 9 of the chip TL494CN, and the G pole of the field effect transistor Q2 is connected with the pin 10 of the chip TL494CN; the D poles of the first field effect transistor and the second field effect transistor are connected with the input end of the high frequency isolation transformer circuit respectively.

The invention relates to a self-anti-interference starting method for a permanent magnetic synchronous motor, and belongs to the technical field of motor driving. The method comprises the steps as follows: detecting and judging the bus current and counter-electromotive force of a permanent magnetic synchronous motor inverter in real time to enable the permanent magnetic synchronous motor inverter to execute waiting, compulsive stop instruction or to be switched into a pre-start mode; setting periodic start time Tn and restart times w to enable the permanent magnetic synchronous motor to be started at a time after the periodic start time Tn, the start times of the permanent magnetic synchronous motor is less than or equal to the restart times w, and fault information is sent to the permanent magnetic synchronous motor if the start fails; and as regards an initial position detection module, exerting a series of voltage pulse with the same size and different directions to a stator winding and detecting the corresponding current of the stator winding to acquire an initial position. The starting method improves the start reliability of the permanent magnetic synchronous motor, reduces damages to the motor caused by frequent controller start, increases the angle control precision of a wireless sensor, and improves the performances of a motor control system.

The invention discloses a soft start valve, which comprises a valve body with an inlet and an outlet. The valve body is provided with a relative valve port and a valve core. The upper surface of the valve core is connected with a valve stem. The sleeve slides up and down. There is also a chamber in the valve body. A valve cover is provided on the top of the valve body. The bottom surface of the valve cover is sealed with the valve body and the valve stem guide sleeve. There is a piston with a piston rod in the cylinder, the lower end of the piston rod is connected with the valve rod, the first throttling channel is communicated between the chamber and the inlet, and the chamber is communicated with the top of the piston cylinder with a The second throttling passage communicates with the third throttling passage between the top of the piston cylinder and the outlet. The soft start valve product of the present invention can utilize sealing components such as valve body rough parts, lower end caps and valve cores of conventional pressure reducing valves, and does not need to add new molds, which can greatly reduce the manufacturing cost.

The invention discloses a two-way boost-buck circuit for a storage battery energy-storage system and a digital control method thereof. The two-way boost-buck circuit consists of an energy storage inductor LP, a power tube Sbuck, a power tube Sboost, a snubber capacitor Cs, a resonant inductor Lr, a resonant capacitor Cr and a diode. A control device includes a control core, a drive circuit, a sampling circuit, an upper computer and an LCD display screen. The control core obtains the voltage, current, and output voltage of the storage battery set, the voltage of the snubber capacitor Cs, and the voltage of the power tube Sbuck by the sampling circuit; on the basis of a corresponding control algorithm, a drive wave form is outputted by the drive circuit so as to drive the power tube Sbuck and the power tube Sboost; the control core sends the voltage and the current of the storage set to the LCD display screen; the upper computer collects all variable values of the current working situation from the control core and the values are displayed by upper computer software; and the upper computer also can send a control command to the control core. According to the invention, the provided circuit and method can be applied to the storage battery energy storage system and two-way electric energy flowing can be realized well.

The invention relates to an inter-shaft permanent magnet coupling mechanism used for transmitting torque between two rotating shafts. The mechanism is characterized in that a permanent magnet rotor and a conductor rotor are of disk structures, and the end faces of the permanent magnet rotor and the conductor rotor are opposite and form an air gap; a plurality of main magnets on the permanent magnet rotor are distributed along the circumference, magnetizers made of permeability magnetic materials are put between adjacent main magnets, and auxiliary magnets are arranged on the sides, far from the conductor rotor, of the magnetizers; the magnetic pole directions of the main magnets are positioned on the circumferential direction of the permanent magnet rotor, and the magnetic pole directions of adjacent main magnets are opposite or reverse; the magnetic pole directions of the auxiliary magnets are vertical to the end face of the permanent magnet rotor, and the magnetic pole directions of adjacent auxiliary magnets are opposite; and the magnetic poles on the sides on which two adjacent main magnets and one auxiliary magnet are in contact with the same magnetizer have the same polarity. The mechanism can transmit larger torque, can adjust the transmitted torque, has compact structure and low requirement for installation precision, and is stable in transmission and adjustment.

The invention belongs to the technical field of solar energy utilization, and in particular relates to a portable photovoltaic direct drive refrigerator system with thermoelectric adaptive cooling components, including photovoltaic power generation components, thermoelectric adaptive cooling components and DC refrigerator components; photovoltaic power generation components include photovoltaic panels, A DC fuse and a maximum power tracking module; a thermoelectric adaptive cooling component includes interconnected thermoelectric power generation sheets and a DC fan; a DC refrigerator component includes a refrigerator box, a DC inverter compressor, a DC compressor controller, and a thermostat. By adding a thermoelectric self-adaptive cooling component, the present invention can self-adaptively adjust the speed of the internal fan to help the contents cool down quickly, which is conducive to the timely transfer of cooling capacity, and is more in line with the scene requirements for outdoor use. Moreover, the system adjusts the speed of the compressor according to the maximum power available from the photovoltaic panels. The energy utilization efficiency of the system is higher, and the cooling rate is faster, which meets the needs of rapid cooling for outdoor use of photovoltaic refrigerators.