Overload protection method and overload protection system for direct-current (DC) motor

A DC motor and overload protection technology, applied in the direction of emergency protection circuit devices, electrical components, etc., can solve the problems of energy waste, power consumption, and high production costs, and achieve the effects of reducing production costs, fast response speed, and reliable control

Inactive Publication Date: 2013-05-15
深圳怡化时代智能自动化系统有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

These protective devices are independent of each other, not only troublesome to install, high overall production cost, but also consume a certain amount of electric energy during the normal operation of the motor, resulting in energy waste

Method used

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  • Overload protection method and overload protection system for direct-current (DC) motor
  • Overload protection method and overload protection system for direct-current (DC) motor
  • Overload protection method and overload protection system for direct-current (DC) motor

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Embodiment Construction

[0037] Such as figure 1 As shown, the present invention discloses a DC motor overload protection method, comprising the following steps: in step S1, obtain the PWM value of the DC motor in real time; in step S2, store all the obtained PWM values; in step S3 In, judge whether the quantity of the obtained PWM value reaches the preset value, if so, execute step S4, otherwise, execute step S1; Compare with a predetermined threshold, and judge whether the comparison result meets the regulations. If it meets the regulations, then the DC motor runs normally, otherwise, the DC motor stops rotating; in step S5, step S1 is executed.

[0038] In the step S2, all the acquired PWM values ​​are summed and stored.

[0039] Such as figure 2 As shown, the present invention discloses an embodiment of an overload protection method of a DC motor. In step Q1, the PWM value of the DC motor is obtained in real time; in step Q2, the PWM value is written into the write pointer of the circular buffe...

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PUM

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Abstract

The invention provides an overload protection method for a direct-current (DC) motor. The overload protection method for the DC motor comprises several steps, wherein a step A is that pulse-width modulation (PWM) values of the DC motor are obtained in real time; a step B is that the obtained PWM values are stored; a step C is that whether the obtained PWM values reach a preset value is judged, and if the obtained PWM values reach the preset value, a step D is executed, otherwise the step A is executed again; the step D is that a result value is obtained from the PWM values in the step B and compared with a preset threshold to obtain a comparison result, then whether the comparison result meets a specification is judged, if the comparison result meets the specification, the DC motor runs normally, otherwise the DC motor stops running; and a step E is executing the step A. The invention further provides an overload protection system for the DC motor. The overload protection method and the overload protection system for the DC motor have the advantages that under the circumstance that no additional hardware circuit is arranged, through the overload protection method and the overload protection system, the situation that the DC motor runs in an overload mode can be timely judged, the response speed is high, the control is reliable, and the production cost is greatly lowered.

Description

technical field [0001] The invention relates to the field of motors, in particular to an overload protection method and system for DC motors. Background technique [0002] Motors are widely used in people's production, life, scientific research and other fields, so various types of motor protection devices have emerged, such as undervoltage protection, overvoltage protection and overcurrent protection. These protection devices are independent of each other, not only troublesome to install, but also high overall production cost, and also consume a certain amount of electric energy during the normal operation of the motor, resulting in energy waste. Contents of the invention [0003] In order to solve the problems in the prior art, the invention provides an overload protection method for a DC motor. [0004] The invention provides an overload protection method for a DC motor, comprising the following steps: [0005] A. Obtain the PWM value of the DC motor in real time; ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H7/085
Inventor 张北青胡钦惠王应建
Owner 深圳怡化时代智能自动化系统有限公司
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