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DC motor control method and device

A DC motor and control device technology, applied in the field of motors, can solve problems such as insufficient torque of DC motors

Active Publication Date: 2015-09-30
ELITE SEMICON MEMORY TECH INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, reducing the number of turns of the coil may cause insufficient torque of the DC motor at low speed, such as figure 1 As shown, the torque corresponding to the curve C2 is lower than the torque corresponding to the curve C1 at low speed

Method used

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  • DC motor control method and device
  • DC motor control method and device

Examples

Experimental program
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Embodiment Construction

[0039] [Example of DC Motor Control Method]

[0040] Please refer to Figure 2A , Figure 2A It is a flow chart of the DC motor control method provided by the embodiment of the present invention. The aforementioned DC motor may be, for example, a DC brushed motor, a DC brushless motor or a stepping motor. The DC motor can be applied to, for example, a drive motor of a printer, an electric fan for heat dissipation, a motor of a hard disk of a computer, etc., but the present invention is not limited thereto. The DC motor control method of this embodiment is used to control the DC motor, and the method includes the following steps.

[0041] In step S110, a reference signal is obtained, and the reference signal represents the rotational speed of the DC motor. Step S110 may be realized by using a rotational speed sensing unit to sense the rotational speed of the DC motor, for example, by sensing the magnetic pole position of the rotor of the DC motor to obtain the rotational sp...

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PUM

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Abstract

An embodiment of the invention provides a DC motor control method and device used for controlling a DC motor. The method includes steps of acquiring a reference signal representing rotation speed or current of the DC motor; and changing driving voltage of the DC motor according to the reference signal when the rotation, current or motor temperature rise of the DC motor changes. Therefore, the drive voltage can be changed according to the rotation speed or current condition of the DC motor, so that coil current can be adjusted and torque of the DC motor can be adjusted. According to the invention, the drive voltage can be changed according to the rotation speed or current of the DC motor without changing coil turns, and therefore the current of the DC motor can be adjusted.

Description

technical field [0001] The invention relates to a motor, and in particular to a DC motor control method and device thereof. Background technique [0002] Please refer to figure 1 , figure 1 is the torque-speed curve of a conventional DC motor. The torque-rotational speed curve of a traditional DC motor is curve C1, and when the rotational speed of the DC motor increases gradually, the torque of the DC motor decreases gradually. In detail, the equation of the armature coil of the DC motor can be expressed as, V=i·R+k e ω, where V is the voltage of the armature coil, i is the current of the armature coil, R is the resistance of the armature coil, k e Is the back electromotive force constant, ω is the angular velocity (corresponding to the rotational speed of the motor). Traditionally, the driving voltage of the DC motor is fixed, that is, the voltage V of the armature coil is fixed. e Multiplied by the angular velocity ω) also increases accordingly, so that the coil curr...

Claims

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Application Information

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IPC IPC(8): H02P7/06H02P8/12
Inventor 王世杰林登财
Owner ELITE SEMICON MEMORY TECH INC
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