30results about How to "With soft start function" patented technology

The invention discloses a digital program-control constant current source, and belongs to the technical field of electronic equipment. The digital program-control constant current source structurally comprises an output module (9) and a front panel (11), and is characterized by further structurally comprising a single chip microcomputer module (1), a display module (2), an indicator lamp module (3), a key module (4), an encoder module (5), a program control (PC) module (6), a soft starting module (7), a digital-to-analog conversion module (8) and a sampling monitoring module (10). The digital program-control constant current source is based on single chip microcomputer control, and has the advantages of being rich in function, convenient to upgrade, capable of achieving program control and the like; in addition, the digital program-control constant current source has the functions of over-temperature alarming, low-pressure alarming, soft starting and the like, and is high in safety and wide in application range.

The invention discloses a capacitor charge pump, which comprises a booster loop consisting of flying capacitors and a switch, wherein the booster loop has a input end, an output end and a grounding end. The capacitor charge pump is characterized in that: the booster loop comprises a first flying capacitor, a second flying capacitor, a third flying capacitor and a switching program; and after the input end of the booster loop is connected with an input voltage, the flying capacitors and the switch circularly operate according to a four-step switching program, and an output voltage is 1.2 times that the input voltage is obtained at the output end. The booster loop of the 1.2-time boosting capacitor charge pump is simple and only needs three flying capacitor, and when the capacitor charge pump is used in light emitting diode backlight drive, the efficiency of the capacitor charge pump is high.

The invention provides an over-current protection system for satellite load input terminal. The system includes an over-current protection circuit connected with the satellite load input terminal andused for cutting off current output and then performing delayed restoration of current output if detecting the input current of the load terminal surpasses a predetermined value when the satellite load terminal meets faults including short circuit, over-current or the like, and cutting off current output permanently if the input current of the load terminal still surpasses the predetermined valueif the above process is repeated for a preset number of times. According to the invention, the current does not surpasses the predetermined value when short circuit occurs at the load terminal and interference to a bus is avoided and the integral satellite safety is not affected; bus stability can be ensured when a load meets short circuit, over-current or the like and no interference is generatedto other electricity using loads and the integral satellite safety is ensured. The system provided by the invention has a function of soft starting. Besides, current input can be restored through commands. According to the invention, soft starting and over-current protection are integrated together, power devices are not increased and only a part of control circuits is added.

The invention discloses a transmission system with a permanent magnet speed regulation clutch. The transmission system comprises a motor, a clutch and load equipment. A driving disk of the clutch is connected with an output shaft of the motor, a driven disk of the clutch is connected with an input shaft of the load equipment, a conductor disk is fixedly installed on the front side of the driving disk, a permanent magnet is fixedly installed on the driven disk, a magnetic pole of the permanent magnet is positioned on the front side of the driven disk, the front side of the driving disk and the front side of the driven disk are coaxially and oppositely arranged and are not contacted, a gap is positioned between the conductor disk and the magnetic pole of the permanent magnet, and the motor or the load equipment is positioned on the adjustable slide base. The transmission system ahs the advantages of being soft-start, capable of prevent rotation plug, capable of reducing vibration, capable of regulating speed, simple in structure, easy to install and the like.

The invention provides a quick response loop compensation circuit, a loop compensation chip and a switching power supply. The quick response loop compensation circuit comprises a variable output slew rate differential amplifier, a dynamic current induction operational amplifier, a resistor R1, a resistor R2 and a capacitor CC. When the input voltage of the variable output slew rate differential amplifier is in a small signal interval, the current fed back by the dynamic current induction operational amplifier is zero or very small, and the output slew rate of the variable output slew rate differential amplifier is not changed. When the variable output slew rate differential amplifier is out of the small signal interval, the dynamic current induction operational amplifier outputs dynamic response current to the variable output slew rate differential amplifier, so that the slew rate of the variable output slew rate differential amplifier is increased, and the output impedance of the variable output slew rate differential amplifier is reduced. Under the condition that the loop stability and the dynamic performance are not sacrificed, loop normalization of switching power supplies of different specifications is achieved, and manpower and material resources needed by loop debugging are saved. When the switching power supply is started, the stress is reduced, and the output voltage overshoot phenomenon is avoided.

The invention discloses a torque limiting coupler with a soft start function. The torque limiting coupler comprises a rotor, wherein an inner rotor is arranged at a driving end in a sleeving manner; an outer ring is connected with a load end; a plurality of first transmission devices and a plurality of second transmission devices are arranged on the inner rotor; the first transmission devices areuniformly distributed along the outer circumference of the inner rotor; first thrust rods are arranged on the inner side, opposite to the first transmission devices, of the outer ring; each second transmission device comprises a thrust end and a counterweight end; the thrust ends are positioned on the outer circumference of the inner rotor; the thrust ends are uniformly distributed along the outercircumference of the inner rotor and are crossed with the first transmission devices; and second thrust rods are arranged on the inner side, opposite to the end parts of the second transmission devices, of the outer ring. According to the torque limiting coupler, the torque of the driving end is transmitted to the load end through the transmission devices arranged on the inner rotor; when a rotating shaft of a motor rotates, the torque of the load end can be smoothly increased, and rigid impact is avoided; and after the load end conducts normal operation, enough large torque can be transmitted, and equipment and mechanisms of a transmission chain can be protected.

The invention relates to a soft starting switch circuit and an electronic apparatus. The soft starting switch circuit comprises an input end, an output end, a first transistor, a second transistor, a third transistor, a charge energy storage unit, a first resistor and a second resistor. When the input voltage received on the input end changes into high potential from low potential, the second transistor is connected to provide a charging path so that the charge energy storage unit can store electric energy. The voltage on the control end of the first transistor gradually decreases, so that the first transistor is connected gradually to send the input voltage of the input end to the output end to serve as output voltage. When the input voltage received on the input end changes into low potential from high potential, the third transistor is connected to provide a discharging path so that the charge energy storage unit can release the stored electric energy.

A switching power converting apparatus includes a voltage conversion module, a detecting unit, and a switching signal generating unit. The voltage conversion module converts an input voltage into an output voltage associated with a secondary side current, which flows through a secondary winding of a transformer and is generated based on a switching signal. The detecting unit generates a detecting signal based on the output voltage and a predetermined reference voltage. The switching signal generating unit generates the switching signal based on the detecting signal and an adjusting signal so that the secondary side current is gradually increased during a start period of the switching power converting apparatus.

The invention discloses a half hydraulic coupler. The half hydraulic coupler comprises an outer shell, an input shaft, an output shaft, an outer rotor and an inner rotor, wherein the outer end of the input shaft and the outer end of the output shaft extend outside the outer shell, the outer rotor is installed in the outer shell and fixedly connected with the output shaft, and the inner rotor is sleeved with the outer rotor and fixedly connected with the input shaft; the inner wall of the outer rotor is a round reducing hook face which is equally divided into a plurality of equally-divided hook face bodies, the reducing size and the direction of the equally-divided hook face bodies are the same, a plurality of movable tooth grooves are formed in the outer wall of the inner rotor, movable teeth are embedded into the corresponding movable tooth grooves in a one-to-one manner, the bottoms of the movable tooth grooves are communicated with a high-pressure oil inlet, and outer ends of the movable teeth face the hook face of the outer rotor. The half hydraulic coupler has the beneficial effects of being wide in speed regulating scope, high in efficiency, small in size and small in weight; the rotating-speed difference is avoided during full-power output power, and meanwhile the soft starting function and outer load impact isolation performance are achieved; as the working efficiency of the half hydraulic coupler is high, the heating amount during working is less, and the half hydraulic coupler has the beneficial effect of being small in number of additional device, high in reliability, low in cost and the like.

The invention discloses a magnetic isolation signal feedback device for space power supply control, which belongs to the technical field of space power supplies, and is characterized in that a feedback signal generation circuit realizes sampling and signal conversion of secondary side output voltage and load current of an isolation power supply, generates characteristic signals reflecting the output voltage and current, and realizes an auxiliary source self-lifting function of the circuit; after reference comparison of output characteristic signals is achieved, the output characteristic signals are converted into error signals reflecting topological secondary side output voltage and load current of the isolated power supply, and signal transmission from the secondary side characteristic signals to the primary side in an isolated mode is achieved through a magnetic isolation circuit. The magnetic isolation circuit controls the conduction time and energy storage of a secondary winding of the signal isolation transformer, transmits an error signal to a main winding end of the signal isolation transformer, and completes the signal isolation transmission of the secondary side output voltage and load current characteristics of the isolation power supply. The feedback signal demodulation circuit demodulates the error signal, and the generated error signal is directly proportional to the output voltage and the load current of the isolated power supply.

The invention relates to the field of portal crane swing equipment, in particular to a portal crane swing mechanism driving system which comprises a motor. And the motor is connected with the speed reducer through a torque-limiting permanent magnet coupling. According to the invention, a limit torque limiter is replaced by the torque-limiting permanent magnet coupling; the whole driving system ismore sensitive in protection action, meanwhile, automatic recovery can be achieved, damage to parts is reduced or avoided, meanwhile, a novel torque limiting type permanent magnet coupler is adopted,the driving system can have the soft start function, and the stability of the whole system is better guaranteed.