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Motor drive circuit

A motor drive and drive circuit technology, applied in the direction of DC motor rotation control, etc., can solve the problems of large volume, large circuit size, and not suitable for installation in reflectors, etc., to improve motor drive capability, reduce heat generation, and reduce size. Effect

Pending Publication Date: 2020-07-14
上海谭慕半导体科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The folding of the car rearview mirror is usually realized by a motor. In the prior art, such as the patent publication number: KR100900581B1, the disclosed folding drive circuit of the vehicle side mirror uses a microprocessor. way, to control, the circuit of the above-mentioned existing structure has a large volume, therefore, it is not suitable to be contained in the housing of the reflector. In addition, even if an integrated circuit is used, due to the use of 4 high-power drive elements, the volume is still relatively large, resulting in lots of heat

Method used

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Embodiment 1

[0017] Such as figure 1 As shown, the present invention proposes a motor drive circuit 30, including a first input terminal IN1, a second input terminal IN2, a rectifier circuit 10, a direction discrimination terminal 20 and a drive circuit 30; the first input terminal IN1 and the second input terminal IN1 The two input terminals IN2 are connected to the input terminals of the rectification circuit 10, the output terminals of the rectification circuit 10 are respectively connected to the direction discrimination terminal 20 and the drive circuit 30, and the output terminals of the drive circuit 30 are connected to the motor 40 , the motor 40 is connected to the first input terminal IN1 or the second input terminal IN2. In this application, the rectifier circuit 10 is a bridge rectifier circuit 10 whose structure is not repeated in this application, and is used for converting AC to DC.

[0018] It should be noted that: the driving circuit 30 includes two high-power driving ele...

Embodiment 2

[0026] In this embodiment, the difference from Embodiment 1 is that the other end of the motor 40 is connected to the first input terminal IN1, and the principle is the same as that of Embodiment 1, so it will not be described again.

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PUM

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Abstract

The invention provides a motor drive circuit which comprises a first input end, a second input end, a rectifying circuit, a direction judging end and a drive circuit. The first input end and the second input end are connected with the input end of the rectifying circuit; the output end of the rectification circuit is connected with the direction discrimination end and the drive circuit. The outputend of the driving circuit is connected with a motor, the motor is connected with the first input end or the second input end, one end of the motor is directly connected with one input end, contactsof a pair of driving elements connected in series are connected with the other end of the motor, and therefore the number of the driving elements is reduced, and the size of the driving elements is reduced. After the number of driving elements is reduced, the voltage at two ends of the motor is reduced slightly, the motor driving capability is improved, power consumption is reduced, heat productivity is reduced, and individual driving elements are reduced.

Description

technical field [0001] The invention relates to the field of drive circuits, in particular to motor drive circuits. Background technique [0002] The folding of the car rearview mirror is usually realized by a motor. In the prior art, such as the patent publication number: KR100900581B1, the disclosed folding drive circuit of the vehicle side mirror uses a microprocessor. way, to control, the circuit of the above-mentioned existing structure has a large volume, therefore, it is not suitable to be contained in the housing of the reflector. In addition, even if an integrated circuit is used, due to the use of 4 high-power drive elements, the volume is still relatively large, resulting in Lots of heat. Contents of the invention [0003] In order to solve the above-mentioned technical problems, the present invention proposes a motor drive circuit, including a first input terminal, a second input terminal, a rectifier circuit, a direction discrimination terminal and a driving ...

Claims

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Application Information

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IPC IPC(8): H02P7/03
CPCH02P7/05
Inventor 李东澈
Owner 上海谭慕半导体科技有限公司