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Active discharge circuit and device

A discharge circuit and discharge resistor technology, applied in battery circuit devices, circuit devices, charging/discharging current/voltage regulation, etc., can solve the problems of overheating, burning out of the discharging resistor, and affecting the safety of the motor controller, so as to avoid burning out, The effect of ensuring safety

Pending Publication Date: 2022-04-22
MIDEA GRP (SHANGHAI) CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if the signal tube is open and fails (that is, it cannot be turned on), the discharge resistor will continue to discharge the DC support capacitor, and the discharge resistor will overheat and burn out, seriously affecting the safety of the motor controller

Method used

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  • Active discharge circuit and device
  • Active discharge circuit and device
  • Active discharge circuit and device

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Embodiment Construction

[0026] In order to understand the characteristics and technical contents of the embodiments of the present application in more detail, the implementation of the embodiments of the present application will be described in detail below in conjunction with the accompanying drawings. The attached drawings are only for reference and description, and are not intended to limit the embodiments of the present application.

[0027] figure 1 It is a schematic diagram of the composition and structure of the active discharge circuit in the prior art, such as figure 1 As shown, the active discharge circuit in the prior art includes: a triode NPN tube, a field effect transistor NPN tube, resistors R00, R01, R02, R03, a capacitor C0, and a voltage source VDC; wherein, the base of the NPN tube is connected in series with R03 as an enabling The input terminal of the signal EN0, the emitter of the NPN tube is grounded, the collector of the NPN tube is connected to VDC through R01, the collector ...

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PUM

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Abstract

The invention discloses an active discharge circuit and equipment, and the active discharge circuit receives a first enable signal in a discharge stopping process, and is used for controlling the discharge circuit to be disconnected, so that a first discharge device stops discharging to an energy storage device; and the second control circuit receives the second enable signal and is used for controlling the discharge circuit to be disconnected, so that the first discharge device stops discharging the energy storage device. Therefore, the first control circuit and the second control circuit are used for controlling the discharging circuit to be in a disconnected state, so that the purpose of controlling the first discharging device to stop discharging to the energy storage device by the other control circuit when one control circuit fails in control is prevented, and the first discharging device is prevented from being burnt out in a discharging state for a long time; and the safety of the motor controller is ensured.

Description

technical field [0001] The present application relates to active discharge technology, in particular to an active discharge circuit and equipment. Background technique [0002] After the existing motor controller is cut off from the power supply to control the discharge, there is still a high voltage inside the motor controller due to the DC support capacitor and other energy storage devices inside the motor controller. To prevent personal injury, after the motor controller is cut off from the power supply, it needs to Cut into a special active discharge circuit to quickly release the power stored in the DC support capacitor in the motor controller to below the safe power. [0003] The existing active discharge circuit generally includes a discharge process and a discharge stop process. When the discharge stop process is executed, the gate voltage of the MOS transistor is pulled down by controlling the signal transistor to be turned on, so that the discharge resistor stops ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J7/00H02M1/32H02P29/02
CPCH02J7/007H02J7/00712H02M1/32H02P29/02H02J2207/20H02J2207/50
Inventor 莫宝争
Owner MIDEA GRP (SHANGHAI) CO LTD