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High-power driving protection circuit and method and electronic equipment

A drive protection circuit and power drive technology, applied in the field of circuits, can solve problems affecting the reliability of the high-power drive system, inaccurate sampling results, and wrong shutdown of the power drive unit, so as to avoid wrong turn off and improve reliability , to meet the effect of circuit requirements

Pending Publication Date: 2022-03-04
天津航空机电有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing technology has the following problems. The sampling resistor is connected in series to the high-power load circuit. Since the resistance value of the sampling resistor changes due to factors such as changes in ambient temperature and excessive use time, the sampling result is inaccurate, and the overcurrent misjudgment will cause The power drive unit is turned off by mistake, which affects the reliability of the high-power drive system

Method used

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  • High-power driving protection circuit and method and electronic equipment
  • High-power driving protection circuit and method and electronic equipment
  • High-power driving protection circuit and method and electronic equipment

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Embodiment 1

[0031] figure 1 Structure diagram of an embodiment of a power driver to provide a protection circuit embodiment of the invention, the present embodiment is applicable to the embodiment of the Hall sensor by the multiplexed load circuit power flow scenarios been sampled. Wherein the current power load circuit may be over 50A of the large current.

[0032] Such as figure 1 , The protection circuit 00 of the power driver comprising: a control module 110, multiplexer module 120, the at least one power circuit 130 and at least one current pickup module 140, a current detection circuit 130 of the power module 140 is provided correspondence, current detection module 140 comprises a Hall sensor, a Hall sensor for acquiring a power circuit 130 of the current parameters, and the sampled signal is converted to a current parameter, wherein the sampling signal may be a small analog voltage signal; at least one current collecting module 140 via a multi- sampling end module 120 and the channel ...

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Abstract

The invention discloses a high-power driving protection circuit and method and electronic equipment, the circuit comprises a control module, a multi-way switch module, at least one power loop and at least one current acquisition module, the current acquisition module comprises a Hall sensor, the Hall sensor is used for acquiring current parameters of the power loop, and the Hall sensor is connected with the multi-way switch module; the current parameter is converted into a sampling signal; the at least one current acquisition module is connected with the sampling end of the control module through the multi-way switch module; and the control module is used for outputting a gating control signal to the multi-way switch module, controlling the multi-way switch module to gate any current acquisition module, judging whether an overcurrent fault occurs or not according to at least one sampling signal acquired by the current acquisition module, and outputting a driving signal according to a fault judgment result to drive the power loop to be switched on or switched off. Large current collection is carried out through the Hall sensor, overcurrent protection is realized through a plurality of sampling values, the circuit structure is simple, and the reliability of the power driving system is improved.

Description

Technical field [0001] Technical Field The present invention relates particularly to a driving power protection circuit, a method and an electronic device. Background technique [0002] With the development of the aviation industry, the operation of the power system load current protection reliability requirements gradually improved. [0003] In the conventional power-driven system, typically performed by a mining current sampling resistor, the overcurrent comparator determines the current power recovery circuit based on whether, when an overcurrent occurs, the control power MOSFET is turned off, cutting off the load current. The following problems of the prior art, the sampling resistor connected in series with the load circuit power, since the sampling resistor resistance by environmental temperature changes and prolonged use and other factors vary, resulting in inaccurate sampling result, the overcurrent may cause misjudgment power drive unit mistakenly turned off, power-drive...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H3/05H02H3/08H02H3/087
CPCH02H3/05H02H3/08H02H3/087H02H1/0007
Inventor 李相斌刘义国郑晓康赫世栋詹京景刘素捧
Owner 天津航空机电有限公司
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