Motor rotating speed control method and device and computer readable storage medium

Abstract

The invention provides a motor rotating speed control method and device and a computer readable storage medium. The method comprises the steps of detecting the current rotating speed of a motor; judging whether the current rotating speed is greater than a preset highest safe rotating speed; and when the current rotating speed is greater than the preset highest safe rotating speed, reducing the duty ratio of the excitation voltage of the motor and the corresponding advance angle until the current rotating speed reaches the preset highest safe rotating speed. The duty ratio and the corresponding advance angle of the excitation voltage of the motor are adjusted in time after the motor reaches the highest safe rotating speed, then the rotating speed of the motor is controlled, the motor is prevented from entering an operation state with an overhigh rotating speed, and adjustment of the rotating speed of the motor is stopped when the current rotating speed of the motor reaches the preset highest safe rotating speed. Therefore, the function of the motor is not affected, and the service life of the motor is prolonged.

Description

technical field [0001] The invention relates to the technical field of motor control, in particular to a motor speed control method, device and computer-readable storage medium. Background technique [0002] The current home appliances tend to be intelligent and miniaturized. As the core component of many home appliances, the motor can only be miniaturized and intelligent if the motor is miniaturized and intelligent. While the size of the motor is reduced, the output power of the motor can only be guaranteed by maintaining a high speed of the motor. However, when high-speed motors are used in household appliances with air outlets and air inlets, such as vacuum cleaners and hair dryers, the air inlets or outlets of these electrical appliances are often blocked, which will cause the air intake or outlet volume of the entire household appliances to change. If the motor is in an abnormal working state with too high speed for a long time, it will cause damage to the motor and e...

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Problems solved by technology

[0003] In view of this, the embodiment of the present invention provides a motor speed control method and device to overcome the situation in the prior art that when the air inlet or outlet of an electrical appliance is blocked, the motor is in an operating state of excessively high speed, which affects the speed of the motor. And the function and service life of household electrical appliances

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