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Direct current electric motor control method and device

A technology of DC motors, control methods, applied in directions such as excitation or armature current control

Inactive Publication Date: 2016-12-21
刘华英
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, none of the above three modes can solve the problem of effectively adjusting the running speed and precision of the fan when the temperature of the DC fan motor is low.

Method used

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  • Direct current electric motor control method and device
  • Direct current electric motor control method and device

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Embodiment Construction

[0021] In order to make the purpose, technical solution and advantages of the present invention more clear, the method and device for controlling the DC motor of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0022] In the prior art, common control modes of DC motors include power-on control mode, temperature switch control mode, and gear-based speed regulation control mode. Among them, power-on start is the simplest control method, that is, after starting the controller, a constant amplitude DC voltage is passed to the fan motor to make the motor run at a constant speed; for the temperature switch control method, it is Add a switch on the basis of the temperature control switch on and off, when the temperature is too low, the switch is off, the fa...

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PUM

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Abstract

The invention discloses a method and device for controlling a DC motor, wherein the method includes the following steps: obtaining the temperature of the DC motor to be measured at a working speed state, and calculating the difference between the temperature and the preset temperature; The difference between the temperature and the preset temperature is used to calculate the first duty cycle of the pulse width modulation signal used to control the DC motor; the pulse width modulation signal of the first duty cycle obtained according to the calculation is used to control the DC motor in the working speed state run. Since the first duty cycle of the pulse width modulation signal can be accurately adjusted according to the temperature reference factor, the rotational speed of the DC motor can be adjusted with high precision through the pulse width modulation signal. Compared with the control method of dividing the detected temperature into intervals and controlling the operation of the DC motor in different gears in the traditional technology, it realizes the stepless control of the DC motor control.

Description

technical field [0001] The invention relates to the technical field of motor control, in particular to a method and device for controlling a DC motor. Background technique [0002] A direct current machine refers to a rotating electrical machine that can convert DC electrical energy into mechanical energy (DC motor) or convert mechanical energy into DC electrical energy (DC generator). It is a motor that can convert DC electric energy and mechanical energy into each other. When it operates as a motor, it is a DC motor, which converts electrical energy into mechanical energy; when it operates as a generator, it is a DC generator, which converts mechanical energy into electrical energy. [0003] Depending on the usage environment, DC fan motors are included in DC motors. The control of the DC fan motor is simple, and it only needs to provide a certain amount of DC voltage to start. It is often used as a terminal and is widely used in many industries such as industrial autom...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P7/29
Inventor 刘华英
Owner 刘华英
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