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DC motor driving circuit

A DC motor and drive circuit technology, which is applied in the direction of excitation or armature current control, can solve the problems of narrow voltage range, complex circuit structure, limited motor model, etc., and achieve the effect of wide application

Inactive Publication Date: 2019-04-19
FOSHAN ZHONGGEWEI ELECTRONICS
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, there are many ways to control the speed of the motor, one of which is to control the speed of the motor through the control output of the single-chip microcomputer. The cost of components is high, so the overall cost of the product is relatively high, and it needs to be developed and designed on a relatively complete development platform; 2) It is only suitable for use in some high-precision occasions, and is not suitable for promotion and use in occasions with low requirements
[0003] Secondly, fans (DC motors) have been widely used in the existing home appliance application fields (such as air conditioners and other refrigeration equipment), and the existing single-chip microcomputer directly drives the DC motor with a voltage range of 0-5V, and the voltage range is relatively narrow. Driven motor models are limited

Method used

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  • DC motor driving circuit

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Embodiment Construction

[0011] The present invention will be further described below in conjunction with specific examples.

[0012] See attached figure 1 As shown, in this embodiment, a DC motor drive circuit includes a single chip microcomputer (1), NPN transistor Q1 (2), PNP transistor Q2 (3), a first current limiting resistor R1 (4), a first branch Piezoresistor R2 (5), second voltage dividing resistor R3 (6), first variable resistor R4 (7), second variable resistor R5 (8), second current limiting resistor R6 (9) and capacitor C1 ( 10), wherein the IDE DC motor drive circuit of this embodiment is used to control the fan in the air conditioner, that is, it is also equipped with an external +15V power supply (11) and a DC motor, so as to realize the adjustment of the speed of the DC motor.

[0013] In this embodiment, the IO port of the microcontroller (1) is connected to one end of the first current limiting resistor R1 (4) and the other end of the first current limiting resistor R1 (4) is connec...

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PUM

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Abstract

The invention discloses a DC motor driving circuit. The DC motor driving circuit comprises a single chip microcomputer, an NPN transistor Q1, a PNP transistor Q2, a first current limiting resistor R1,a first voltage dividing resistor R2, a second voltage dividing resistor R3, a first variable resistor R4, a second variable resistor R5, a second current limiting resistor R6 and a capacitor C1. Thesingle chip microcomputer controls on-off of a DC motor control port through an IO port, wherein the resistance values between the first variable resistor R4 and the second variable resistor R5 are employed for adaptive regulation to achieve regulation of the voltage of the DC motor control port so as to achieve the 0-15V control voltage range and facilitate adapt to different types of DC motors,and therefore, the application surface is wider.

Description

technical field [0001] The present invention relates to the technical field of home appliance application fields (such as air conditioners, heaters, etc.), in particular to a DC motor drive circuit. Background technique [0002] At present, there are many ways to control the speed of the motor, one of which is to control the speed of the motor through the control output of the single-chip microcomputer. The cost of components is high, so the overall cost of the product is high, and it needs to be developed and designed on a relatively complete development platform; 2) It is only suitable for use in some high-precision occasions, and it is not suitable for popularization and use in occasions with low requirements. [0003] Secondly, fans (DC motors) have been widely used in the existing home appliance application fields (such as air conditioners and other refrigeration equipment), and the existing single-chip microcomputer directly drives the DC motor with a voltage range of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P7/28
CPCH02P7/28
Inventor 胡梦真卓秀波向小军林崐朱定林尚亚浩钟保仁
Owner FOSHAN ZHONGGEWEI ELECTRONICS
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