7results about How to "Avoid Inrush Current" patented technology

The switching power supply protection circuit and power supply system proposed in this application include: a control module; a charging circuit, the input terminal of which is connected to the switching power supply, the output terminal of which is connected to a capacitor, and the charging circuit is communicatively connected to the control module; and a parallel switch, the first terminal of which is connected to the output terminal of the charging circuit, the second terminal of which is connected to both the output terminal of the charging circuit and the load output terminal, the switching power supply being connected to the load output terminal, and the parallel switch being communicatively connected to the control module. When the switching power supply is powered on, the control module controls the parallel switch to be in the open state and starts the charging circuit to charge the capacitor. When the voltage of the capacitor is detected to reach a preset voltage threshold, the control module also controls the parallel switch to be closed, so that the switching power supply and the supercapacitor supply power to the load output terminal in parallel, significantly improving the safety, reliability, and stability of the entire power supply system.

This application discloses a pre-start control circuit, method, device, and auxiliary lamp for a lamp module. The application relates to the field of auxiliary lamp control technology. The pre-start control circuit includes: a drive voltage supply circuit connected to the drive switch of the lamp module, used to provide drive voltage to the drive switch; a current sampling circuit connected to the drive switch, used to collect the operating current of the drive switch; and a main control module connected to both the drive voltage supply circuit and the current sampling circuit, used to gradually output control signals after receiving the lamp module's turn-on signal, so that the drive voltage supply circuit gradually increases the drive voltage according to the control signals until the operating current of the drive switch reaches a target current; the target current is less than or equal to the maximum current that the drive switch can withstand. This application can improve the reliability of lamp module control.

The embodiment of the invention relates to the technical field of power electronics, and discloses an energy storage system. The system comprises at least one first energy storage unit, the first energy storage unit is connected to an alternating current bus of an energy storage system through a first power conversion system, and a direct current bus bar of the first energy storage unit is connected to a direct current bus of the energy storage system through a direct current-direct current converter and a first switching device in sequence; the second energy storage unit is connected to the alternating current bus through a second power conversion system, and a direct current bus bar of the second energy storage unit is connected to the direct current bus through a second switching device; and the controller is configured to control the DC-DC converter, the first switching device and the second switching device to realize electric quantity balance between the first energy storage unit and the second energy storage unit. The problems of low reliability and limited flexibility of electric quantity equalization among different energy storage units in the prior art are solved.

The invention discloses a function safety protection circuit of a motor controller, and the circuit comprises an operator which is used for generating a communication signal and a trigger signal; the motor driver comprises an MCU, a safety protection circuit and a driving circuit, and the MCU is used for receiving a communication signal and sending out a PWM signal after obtaining the communication signal; the safety protection circuit is arranged between the MCU and the driving circuit and is used for closing the safety protection circuit after receiving the trigger signal, so that the driving circuit can receive the PWM signal; and the driving circuit is used for receiving the PWM signal and driving the circuit to drive the motor to work after obtaining the PWM signal. The safety protection circuit is independently arranged between the MCU and the driving circuit and does not depend on normal execution of MCU software, unexpected operation of the motor is prevented from the physical level, single fault safety is truly achieved, and the intrinsic safety level of motor control is remarkably improved.

This application discloses a soft-start control circuit, method, device, and auxiliary lamp for a lamp module. The soft-start control circuit relates to the field of auxiliary lamp control technology. The soft-start control circuit includes: a switching transistor drive circuit; a switching transistor circuit including at least one switching transistor, with its input connected to the drive circuit and its output connected to the control terminal of the lamp module; and a main control module, whose output is connected to the drive circuit. The main control module receives the lamp module's on / off signal and outputs a control signal, causing the drive circuit to periodically control the switching transistor in the drive circuit to turn on and off according to the control signal until the duration of the main control module's output control signal reaches a target time. This application improves the reliability of lamp module control.

The invention provides a converter control method and device, control equipment and a converter, and belongs to the technical field of power supplies. The converter comprises at least one inversion module, and the inversion module comprises a negative direct current switch and a first buffer unit; the first buffer unit comprises a first buffer switch and a first buffer resistor which are connected in series; the left and right sides of the first buffer unit and the left and right sides of the negative DC switch are respectively provided with a first grounding branch and a second grounding branch, and the first grounding branch and the second grounding branch are provided with Y capacitors and are connected with the same reference ground. The method comprises the following steps: when an inversion module is controlled to work, controlling a negative direct current switch to be closed; and after the negative direct-current switch is detected to be closed, the first buffer switch is controlled to be closed. According to the invention, generation of large impact current can be avoided, reference ground voltage bounce caused by the large impact current can be avoided, stable and reliable starting of the inversion module can be realized, and the safety of each device in the inversion module is protected.

This invention discloses a battery emergency power supply system for power systems. The system includes a charging module, a dispatching module, an energy storage management module, a circuit breaker module, and a battery detection module. It achieves multi-level fault protection through mirrored redundancy links and an intelligent dispatching mechanism. The energy storage management module consists of multiple energy storage cabinets. Each cabinet's backup battery pack within its power supply module forms mirror redundancy with adjacent cabinets. The intelligent dispatching unit dynamically executes individual or unified power supply modes based on load level and grid status, and achieves seamless switching through a pre-synchronization module. The battery detection module, combined with a health assessment unit, monitors battery status in real time, pre-marks potential faults, and activates a hot standby mechanism, significantly improving the reliability and response speed of emergency power supply in power systems. This effectively solves the problems of large switching impact and slow response in traditional systems, making it suitable for critical scenarios with extremely high power supply continuity requirements, such as substation monitoring and communication base stations.