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Low-voltage system passive discharge circuit and using method thereof

A discharge circuit and low-voltage system technology, applied in electrical components, output power conversion devices, etc., can solve the problems of heat generation, increase standby power consumption, large layout space, etc., to reduce power consumption, optimize power consumption, The effect of optimizing design requirements

Pending Publication Date: 2021-03-26
格至控智能动力科技(上海)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] This method can realize the control requirement of passive discharge after the relay is disconnected, but the battery voltage is directly loaded on the discharge resistor. Power consumption; due to high power consumption, larger packages and more discharge resistors are required, the layout space is larger, and it is also accompanied by problems such as heat generation

Method used

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  • Low-voltage system passive discharge circuit and using method thereof

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Embodiment 1

[0020] A low-voltage system passive discharge circuit, including a DC power supply 1, an energy storage capacitor 2, a pull-up resistor 31, a pull-down resistor 32, a discharge resistor 33, a field effect transistor 4 and a dynamic break contact 5, as shown in the figure, the specific structure is :

[0021] One end of the energy storage capacitor 2, one end of the pull-up resistor 31 and the drain of the field effect transistor 4 are connected to each other, and then connected to the positive pole of the DC power supply 1 through the control bus 6 connected in series with the movable contact 5;

[0022] The other end of the energy storage capacitor 2 is connected to the negative pole of the DC power supply 1;

[0023] The other end of the pull-up resistor 31 is respectively connected to the gate of the field effect transistor 4 and one end of the pull-down resistor 32, and the source of the field effect transistor 4 is connected to one end of the discharge resistor 33;

[00...

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Abstract

The invention relates to the field of devices for protecting converters, in particular to a low-voltage system passive discharge circuit and a using method thereof. Thelow-voltage system passive discharge circuit comprises a direct-current power supply (1), and is characterized by further comprising an energy storage capacitor (2), a pull-up resistor (31), a pull-down resistor (32), a discharge resistor (33), a field effect transistor (4) and a normally-closed contact (5), wherein three nodes of one end of the energy storage capacitor (2), one end of the pull-up resistor (31) and the drain electrode of the field effect transistor (4) are connected with the positive electrode of the direct-current power supply (1) through a control bus (6) connected in series with the normally-closed contact (5); and the other end of the energy storage capacitor (2) is connected with the cathode of the direct-current power supply (1). The using method of the low-voltage system passive discharge circuitis characterized by being implemented according to the following steps in sequence of (1) closing, and (2), disconnection. The circuit has the advantages of compact structure, reduced power consumption, flexible configuration, safety and reliability.

Description

technical field [0001] The invention relates to the field of devices for protecting converters, in particular to a low-voltage system passive discharge circuit and a method for using the same. Background technique [0002] At present, the passive discharge circuit of the low-voltage system mainly releases energy by connecting multiple discharge resistors in parallel. When the main circuit is powered on, all power supplies are loaded on the discharge resistor, and the discharge resistor continues to operate with high power consumption; when the main circuit switch is turned off, the energy of the DC-Link energy storage capacitor is released through the discharge resistor, and the bus voltage on the controller side drops rapidly , to ensure that the fault of relay adhesion is falsely reported after the power is disconnected. [0003] This method can realize the control requirement of passive discharge after the relay is disconnected, but the battery voltage is directly loaded...

Claims

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Application Information

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IPC IPC(8): H02M1/32
CPCH02M1/32
Inventor 李辉林茂锋管博殷浩
Owner 格至控智能动力科技(上海)有限公司