13results about How to "Suppress surge current" patented technology

This invention discloses a boost DC bus voltage matching system for a motor inverter with dual high-voltage battery packs, comprising a battery management system, battery pack A, battery pack B, main negative contactor R2, main positive contactor R3, main negative contactor R4, a first voltage sensor, a first current sensor, a second voltage sensor, a second current sensor, a third voltage sensor, a vehicle control unit, a generator control module, an inverter, a generator, a relay Rb, current sensors a1, b1, and c1, a DC link capacitor bank CDC, a power inverter module, a motor controller, current sensors a2, b2, and c2, and a traction motor. The invention features a highly integrated hardware architecture, effectively reducing system cost and space occupation, enabling seamless battery pack switching during driving, effectively suppressing surge current, protecting high-voltage components and ensuring power stability, improving system fault tolerance, and enhancing the operational reliability of the high-voltage system.

The utility model discloses a bus pre-charging circuit and a power supply system. The bus pre-charging circuit comprises a signal input module, the input end of which is used for receiving a bus pre-charging control signal, and the signal input module is used for outputting a corresponding current signal according to the bus pre-charging control signal; the flyback control module is connected with the output end of the signal input module, and the flyback control module is used for outputting a PWM signal according to the current signal; the isolation transformer module is connected with an input power supply, and the isolation transformer module is used for being connected to a bus to be pre-charged; and the pre-charging PWM driving module is respectively connected with the PWM signal output end of the flyback control module and the isolation transformer module, and the pre-charging PWM driving module is used for controlling the on-off of an internal switching tube according to the PWM signal. According to the utility model, the bus pre-charging circuit is arranged to charge the capacitor on the bus in advance, thereby effectively suppressing the surge impact when the subsequent main power circuit is powered on.

The utility model provides a high-power LED light source driving circuit, which comprises a direct-current power supply, an LED driver, a charging control circuit, a current sampling resistor, a capacitor bank and a discharging control circuit, a direct-current power supply is input to the LED driver, and the LED driver is connected with the current sampling resistor and the capacitor bank in series. The capacitor bank is connected with the anode of the LED light source; the charging control circuit comprises a voltage division circuit I and a voltage comparator I, and the voltage division circuit I samples the voltage output by the LED driver; the voltage comparator I is connected with the LED driver; the LED driver judges whether the capacitor bank is charged or not; the discharge control circuit comprises a controller and a switching device, the switching device is connected to the controller, and the controller controls on and off of the switching device; when the switching device is switched on, the capacitor bank releases electricity to the light source, and the light source is turned on; large current is provided for the light source through energy storage of the capacitor bank, smooth starting of the large-power light source is guaranteed, and the problems of power consumption increase and transmission cable heating are avoided.

The invention discloses a current surge control device and power starting equipment with a surge suppression function. The power starting equipment comprises a power supply device and the current surge control device. The power supply device generates an alternating current signal which changes periodically. The current surge control device comprises a rectifier, a voltage detector, a time sequence control module and a switching device. The rectifier rectifies the AC signal to generate a rectified voltage. The voltage detector generates a trigger signal according to a magnitude relationship between a voltage value of the rectified voltage and a critical voltage. The sequential control module generates a starting signal with a rising positive edge corresponding to a voltage zero point of the AC signal according to the trigger signal, and the switching device receives the AC signal and generates an output voltage according to the starting signal. The voltage detector enables the time sequence control module to generate a starting signal at the time point when the voltage of the alternating current signal is zero according to the relation between the divided voltage and the critical voltage so as to start the switching device, and therefore the effect of restraining the surge current is achieved.

The invention relates to a soft start and overcurrent protection system and module for a magnetic drive conveying line and a control method. The system mainly comprises a soft start and overcurrent protection module, and the soft start and overcurrent protection module is connected in series between a switching power supply and a magnetic drive line driver. The soft start and overcurrent protection module comprises a main power module, a sampling and processing module, a control logic module and a state indication module, and the control logic module is respectively connected with the main power module, the sampling and processing module and the state indication module. Surge current of parallel power-on of multiple drivers is effectively suppressed, impact on a switching power supply and a capacitor is reduced, and the service life of key components of a system is prolonged.

The application relates to the technical field of tube control, and discloses a filament controller for a power tube, a control system and a power supply regulation method, which comprises a first input switching module, a programmable control module, a first output switching module and a power regulation module; the first input switching module is used for receiving and converting external on-off signals and analog signals; the programmable control module is used for receiving signals and generating regulation instruction signals based on internal preset control logic; the first output switching module is used for receiving and converting the regulation instruction signals; the power regulation module is used for receiving the converted regulation instruction signals and outputting a power supply voltage to a filament power supply loop; wherein the power regulation module adjusts the conduction angle of internal power devices based on the regulation instruction signals to change the conduction duration in an alternating voltage half cycle, thereby regulating the effective value of the power supply voltage. The application can realize continuous control of the power supply voltage and reduce filament damage.

The application discloses a phase change memory and a control method thereof, and belongs to the technical field of memories. The phase change memory comprises a plurality of local word lines and a plurality of local bit lines; a storage unit array comprising a plurality of array-arranged storage units, each storage unit being coupled between a local word line and a local bit line; a plurality of storage units comprising a target storage unit; a first current mirror structure coupled to the target storage unit through a local bit line; and a second current mirror structure coupled to the target storage unit through a local bit line. The first current mirror structure is configured to apply a first current signal to the target storage unit in a first time period; the first current signal is greater than a holding current of the target storage unit. The second current mirror structure is configured to apply a second current signal to the target storage unit in a second time period; the second current signal is greater than the first current signal. The above scheme can reduce the inrush current during the RESET operation.

This invention relates to a bridgeless PFC circuit structure and power supply device. The circuit includes a first switching transistor, a first energy storage inductor, a first EC charging module, a second EC charging module, and a charging control module. One end of the first energy storage inductor is connected to the live wire terminal of the power supply device, one end of the first EC charging module, and one end of the second EC charging module. The other end of the first energy storage inductor is connected to the first terminal of the first switching transistor, the other end of the first EC charging module, and the other end of the second EC charging module. The second terminal of the first switching transistor is connected to the neutral wire terminal of the power supply device. The charging control module is connected to the third terminal of the first switching transistor, the first EC charging module, and the second EC charging module, respectively, to control the conduction or cutoff of the first switching transistor, the first EC charging module, and the second EC charging module. This reduces circuit losses caused by the rectifier bridge, improves circuit efficiency, and reduces circuit size.

A power supply device includes an input terminal, a power conversion module, and an inductor. The input terminal is connected to a power supply bus to receive an input voltage. The power conversion module includes a port proximate to the input terminal, and the port exhibits capacitive impedance characteristics. The inductor is connected in series between the input terminal and the port of the power conversion module. When the input terminal is connected to the power supply bus, a surge current flowing into the power conversion module is suppressed by the inductor.

The invention belongs to the technical field of electronic circuits, and particularly relates to a voltage feedback type controllable time constant capacitor charging circuit based on a PMOS (P-channel Metal Oxide Semiconductor) switch. Comprising a PMOS switch circuit, an ideal diode is formed by two PMOS switch tubes Q1 to Q2 in a back-to-back mode, the drain electrode of the PMOS switch tube Q1 is connected to a power supply bus, the drain electrode of the PMOS switch tube Q2 is connected to the positive electrode of an energy storage capacitor bank, and an optocoupler N1 receives a PWM signal from an FPGA to control the grid potential of the PMOS switch tube Q2; the voltage sampling feedback circuit comprises an isolation type delta-sigma modulator GLa3316; the PWM generation circuit comprises an FPGA (Field Programmable Gate Array); and the soft start control circuit prestores a soft start control program, and dynamically generates and outputs a PWM control signal with an adjustable duty ratio through a PWM generator in the soft start control circuit according to the real-time voltage value transmitted by the voltage sampling feedback circuit and a preset soft start curve. The circuit aims at achieving linear and programmable control over the charging process of the high-capacity energy storage capacitor and effectively restraining the power-on surge current.

The application discloses a control assembly and a server, relates to the technical field of circuits, and can realize power control of a plurality of disks and a single disk of a server system through timing control of a backboard controller, and reduces hardware cost; the control assembly comprises a backboard controller, a switch unit, a plurality of hard disk connectors and a plurality of hard disks; a power supply end of the backboard controller is electrically connected with a first power supply end, a control end of the backboard controller is connected with an enable end of the switch unit, and one output end of the backboard controller is connected with an input end of one hard disk connector; an input end of the switch unit is electrically connected with a second power supply end, and an output end of the switch unit is used for connecting a power supply end of the hard disk; at least two output ends of the hard disk connector are used for respectively connecting a power supply end and a control end of the hard disk; the backboard controller is configured to output a first control signal through the control end to control the switch unit to be turned on, and output a second control signal to the hard disk connector through the output end to control power-on and power-off of the hard disk.

This invention discloses a power-type composite thermistor for suppressing surge current, comprising an NTC thermistor chip and a PTC thermistor chip encapsulated in a resin layer with their two electrodes in contact. A common pin is fixed to the contact electrode of the NTC and PTC thermistor chips, and NTC and PTC thermistor pins are fixed to the non-contact electrode of the NTC and PTC thermistor chips, respectively. The contact NTC and PTC thermistor chips are connected in parallel in a circuit for suppressing surge current. This invention uses a soldered encapsulation method, facilitating mass production, and offers advantages such as low-temperature start-up, surge suppression, and adaptability to frequent power-on / off cycles. Its novel structure has promising application prospects.

This application discloses a power supply circuit and system, and a mobile device, belonging to the field of electronic technology. The circuit includes a pre-charging unit and multiple power distribution branches. The positive input terminal of each power distribution branch is connected to the input terminal of the pre-charging unit, and the positive output terminal of each power distribution branch is connected to the respective output terminal of the pre-charging unit. The input terminal of the pre-charging unit is also used to connect to the positive power supply terminal of a power source, and the positive output terminals of each power distribution branch are used to connect to loads. The pre-charging unit outputs pre-charge energy to the target load when pre-charging is required for the target load corresponding to the target power distribution branch. The target power distribution branch remains off when the voltage corresponding to the target load is less than a preset threshold, and turns on when the voltage of the target load is greater than or equal to the preset threshold, to supply power to the target load. This application can effectively suppress surge currents or inrush currents that may occur when capacitive loads are powered on, thereby improving the safety and reliability of power supply.