Motor controller and method

Abstract

The invention relates to a motor controller and a method. The motor controller comprises a single-chip microcomputer circuit, a photoelectric isolation circuit, an amplifying circuit, a switch circuit, a feedback circuit and a brushless motor. The single-chip microcomputer circuit generates a pwm direct-current signal, and adjusts the output of the pwm direct-current signal according to a positionsignal and a steering signal. The photoelectric isolation circuit is used for carrying out optoelectronic isolation on the pwm direct-current signal. The amplifying circuit is used for amplifying thepwm direct-current signal. The switch circuit is used for carrying out the conduction according to the pwm direct-current signal, and generating a pwm three-phase square wave signal. The brushless motor generates a circular magnetic field in the brushless motor according to the pwm three-phase square wave signal so as to control the operation of the rotor of the brushless motor. The feedback circuit detects the input current of the brushless motor in real time, acquires the position and the steering of the rotor, generates current, position and steering signals and transmits the signals to the single-chip microcomputer circuit. Compared with the prior art, the safety of the single-chip microcomputer circuit can be effectively ensured. Meanwhile, the anti-interference capability is high, and the circular magnetic field is synthesized. The direct-current voltage utilization rate is improved, and the cost is reduced.

Description

technical field [0001] The invention relates to the field of motor technology, in particular to a motor controller and method. Background technique [0002] Brushless DC motor is a new type of motor that has matured with the development of new power electronic devices and permanent magnet materials, and belongs to the category of synchronous motors. Although the development time of brushless DC motor in our country is short, it has developed rapidly with the increasing maturity and perfection of technology, and has been widely used in many fields such as medical equipment, household appliances, electric vehicles and so on. However, in the prior art, a brushless DC motor controller is often used, and the controller has a complex structure, low utilization rate of the DC voltage, and high cost. Contents of the invention [0003] The object of the present invention is to provide a motor controller and method, and the technical problems to be solved are: the controller has a ...

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