Rotation speed control circuit and method for motor

Abstract

The invention belongs to the field of control over a motor, and provides a rotation speed control circuit and method for the motor. The rotation speed control circuit comprises a detection circuit used for obtaining the work currents of the motor, a single-chip microcomputer used for controlling the pulse frequency according to a current frequency table and the work currents to output pulse signals to a driving circuit of the motor, and the driving circuit used for controlling the rotation speed of the motor according to the pulse signals. According to the rotation speed control circuit and method for the motor, the detection circuit detects the work currents fed back by a motor end, after the work currents are analyzed and processed by the single-chip microcomputer, the single-chip microcomputer outputs the pulse signals to the driving circuit of the motor by controlling the pulse frequency, real-time control over the rotation speed of the motor is achieved, the utilization rate of the motor is effectively improved, the service life of the motor is prolonged, energy consumption is effectively saved, and meanwhile the noise of the motor is lowered.

Description

technical field [0001] The invention belongs to the field of motor control, and in particular relates to a motor speed control circuit and method. Background technique [0002] At present, motors have been widely used in the field of control or in daily work. Whether the motor is no-load or in normal operation, the traditional motor runs at a fixed single speed; or, it is necessary to manually adjust the speed of the motor. In some industrial or control systems, it is necessary to intelligently adjust the motor speed. For example, when the motor is in the no-load state, the motor needs to work at a low speed to save energy consumption; noise. Contents of the invention [0003] The purpose of the embodiments of the present invention is to provide a motor speed control circuit and method to solve the problem of intelligently controlling the speed of the motor. [0004] The embodiment of the present invention is achieved in this way, a motor speed control circuit, the moto...

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Problems solved by technology

[0003] The purpose of the embodiments of the present invention is to provide a motor speed control circuit and method to solve the problem of intelligently controlling the speed of the motor

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