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Speed regulation method of direct-current motor

A technology of DC motor and speed regulation method, applied in the direction of DC motor speed/torque control, electrical components, control system, etc., can solve problems such as smooth speed regulation, low efficiency, soft mechanical characteristics, etc., and achieve self-diagnosis function Effect

Inactive Publication Date: 2016-12-07
蔡启玲
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In the process of realizing the present invention, the inventors found that in the prior art at least there are defects such as low efficiency, soft mechanical characteristics, and inability to smooth speed regulation in a wide range in the DC speed control system

Method used

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Embodiment Construction

[0019] Preferred embodiments of the present invention are described below, and it should be understood that the preferred embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.

[0020] Specifically, a DC motor speed regulation method mainly includes:

[0021] a. system initialization;

[0022] b. At the same time, whether the sampling time of the current loop and the sampling time of the rotational speed are reached; if the sampling time of the current loop is arrived, then execute step c, otherwise continue sampling, if the sampling time of rotational speed arrives, execute step d, otherwise continue sampling;

[0023] c. Judging whether the feedback current is less than a set smaller value, if less, performing integral control on the current, otherwise performing digital proportional integral control, and performing step e after performing corresponding control on the current;

[002...

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Abstract

The invention discloses a speed regulation method of a direct-current motor. The method mainly comprises the following steps of: simultaneously judging whether a current loop sampling time and a rotation speed sampling time arrive or not; if the current loop sampling time arrives, judging whether a feedback current is smaller than a set relatively small value or not, if the judging result is positive carrying out integral control on the current, otherwise, carrying out digital proportional integral control on the current; if the rotation speed sampling time arrives, carrying out digital proportional integral control on a rotation speed; after corresponding controls are carried out, triggering a digital trigger and controlling the motor to regulate the speed; and diagnosing whether a rotation speed fault exists or not by a system, and displaying the rotation speed. The method disclosed by the invention can be used for overcoming the defect that the direct-current speed regulation systems in the prior art are low in efficiency and soft in mechanical characteristics and cannot carry out smooth speed regulation in a relatively wide range, and can be used for realizing a self-diagnosis function of the system at the same time.

Description

technical field [0001] The invention relates to the technical field of DC motor speed regulation, in particular to a DC motor speed regulation method. Background technique [0002] DC motor speed control system is widely used in current industrial production. For example, the reversible rolling mill in the steel rolling branch and the gantry bed in the machine repair branch require frequent forward and reverse running speed control systems, and the starting of the DC motor should be shortened as much as possible. The time of the braking process is an important factor in improving productivity. . The original DC speed control system uses a constant DC voltage to supply power to the DC motor armature, and realizes speed regulation by changing the resistance in the armature circuit. This method is simple and easy, the equipment is easy to manufacture, and the price is low. But the disadvantages are low efficiency, soft mechanical characteristics, and inability to smooth spee...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P7/00
CPCH02P7/00
Inventor 蔡启玲
Owner 蔡启玲
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