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Power supply voltage fluctuation improvement method based on motor driving circuit

A motor drive circuit, power supply voltage technology, applied in emergency protection circuit devices, circuit devices, emergency protection circuit devices for limiting overcurrent/overvoltage, etc. Life shortening and other problems, to increase product life, improve system stability, and solve the effect of power supply voltage increase

Active Publication Date: 2020-06-26
ZHEJIANG WEIXING INTELLIGENT METER STOCK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It may cause the power supply of the entire circuit board to be pulled high, causing the entire microcontroller to work abnormally, which may eventually lead to shortened product life

Method used

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  • Power supply voltage fluctuation improvement method based on motor driving circuit
  • Power supply voltage fluctuation improvement method based on motor driving circuit
  • Power supply voltage fluctuation improvement method based on motor driving circuit

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Embodiment Construction

[0016] In order to describe the technical content, structural features, and achieved effects of the present invention in detail, the present invention will be further described below in conjunction with the accompanying drawings.

[0017] Such as figure 1 As shown, a method for improving power supply voltage fluctuations based on a motor drive circuit, the motor drive circuit includes a single-chip microcomputer U1, a valve chip U2, a first filter capacitor C1, a second filter capacitor C2, a third filter capacitor C3, two wires Valve P1.

[0018] The P07 pin of the single-chip microcomputer U1 is connected to the VCC pin and the SLEEP pin of the valve chip U2, and is connected to one end of the third filter capacitor C3, and the other end of the third filter capacitor C3 is grounded. The P06 pin of the microcontroller U1 is connected to the IN1 pin of the valve chip U2. The P05 pin of the microcontroller U1 is connected to the IN2 pin of the valve chip U2. The VM pin of th...

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Abstract

The invention provides a power supply voltage fluctuation improvement method based on a motor driving circuit. According to the invention, an OPEN pin and a CLOSE pin are set to be at a high level after the forward rotation or reverse rotation of a motor is realized and the motor is in place (i.e., the valve opening and closing actions are completed), at the moment, an OUT1 pin of a valve chip outputs a high level, an OUT2 pin outputs a low level, and at the moment, the motor does not move. After 0.1s to 0.2s, the power supply of the valve chip is cut off, and a SLEEP pin, the OPEN pin and theCLOSE pin are set to be at a low level at the same time. According to the method, other components on the circuit board can be well protected, the system stability can be improved, the service life of the product is prolonged, and the problem that the power supply voltage rises after the motor stops rotating and is turned off is solved.

Description

technical field [0001] The invention belongs to the technical field of instrument intelligent control, and relates to a motor drive circuit and a motor control method. Background technique [0002] With the development of microprocessors and Internet of Things technology, many devices need the ability to control motors, such as electric vehicles, electric mixers and other equipment, and instrument electronics are no exception. Due to limited conditions, our products need to run for a long time under battery power. Because the motor (valve) does not need to move frequently, we will cut off the power supply of the valve chip after the motor (valve) has finished working. In this case, there will be a back electromotive force kickback in the action of the motor, causing the power supply voltage to rise instantaneously. At the beginning, this situation can be alleviated by capacitors, but after 3 or 5 years, capacitors will inevitably age. It may cause the power supply of the e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H9/04
CPCH02H9/045
Inventor 林扬宣王晓枫
Owner ZHEJIANG WEIXING INTELLIGENT METER STOCK
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