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Two-side current hardware protection circuit device suitable for brushless direct current motor driver

A brushed DC motor and hardware protection technology, which is applied in the direction of emergency protection circuit devices, electrical components, and structural parts of electrical equipment, etc. It can solve problems such as inability to convert high and low electric frequencies, circuit parameter analysis, poor comparison ability, and impact protection. , to achieve the effect of easy implementation, fast response and low cost

Pending Publication Date: 2019-09-20
GUIZHOU AEROSPACE LINQUAN MOTOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the existing brushless DC motors only use simple circuit comparators to participate in the protection, and cannot realize the conversion of high and low electric frequencies during the implementation period, and the ability to analyze and compare circuit parameters is poor, which affects the actual protection.

Method used

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  • Two-side current hardware protection circuit device suitable for brushless direct current motor driver
  • Two-side current hardware protection circuit device suitable for brushless direct current motor driver

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Embodiment

[0022] Such as figure 1 , figure 2 The shown double-sided current hardware protection circuit device suitable for brushless DC motor drivers includes a current sensor 1 , which is different in that: the communication port of the current sensor 1 is provided with a signal follower amplifier circuit 2 . At the same time, the output end of the signal follower amplifier circuit 2 is connected with a current protection comparison circuit 3 , and the input end of the current protection comparison circuit 3 is also connected with a current-limiting reference voltage. Moreover, the output end of the current protection comparator circuit 3 is connected to the control module 5 .

[0023] As far as a preferred embodiment of the present invention is concerned, in order to improve the current protection effect, a current limiting upper limit module and a current limiting lower limit module are installed between the current protection comparison circuit 3 and the current limiting referenc...

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Abstract

The present invention relates to a two-side current hardware protection circuit device suitable for a brushless direct current motor driver, which comprises a current sensor. A communication port of the current sensor is provided with a signal following amplification circuit; an output terminal of the signal following amplification circuit is connected with a current protection comparison circuit; an input terminal of the current protection comparison circuit is also connected with a current-limiting reference circuit; and an output terminal of the current protection comparison circuit is connected with a control module. As a result, through the current two-side protection, protection can be triggered by either the maximum value or the minimum value; the stability is high; and the safe reliability is high. The protection circuit adopts the driver to output the maximum value and minimum value of current in real time to trigger protection, and the protection response speed is fast. The circuit structure is simple, low in cost and easy to implement.

Description

technical field [0001] The invention relates to a double-side current hardware protection circuit device suitable for a brushless DC motor driver. Background technique [0002] As brushless DC motors are used in a wide range of fields, brushless DC motor drive related technologies and products are getting more and more attention. Safety and reliability are the focus of the new energy industry, so it must be reflected in the drive to make it a Technical advantages. [0003] However, the existing brushless DC motors only use a simple circuit comparator to participate in the protection, and cannot realize the conversion of high and low electric frequencies during the implementation period, and the ability to analyze and compare the circuit parameters is poor, which affects the actual protection. Contents of the invention [0004] The purpose of the present invention is to solve the above-mentioned problems in the prior art, and provide a double-side current hardware protecti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H7/08H05K7/20
CPCH02H7/0833H05K7/20136
Inventor 周峰李成泉
Owner GUIZHOU AEROSPACE LINQUAN MOTOR CO LTD