Method for controlling motor

Abstract

The invention relates to a method for controlling a motor, comprising the following steps: initializing an MCU (micro controller unit), including initialization of pulse timing timers and motor rotating speed timers; computing interrupt times of pulse timing timers corresponding to N feedback pulses, wherein interrupt routines of the pulse timing timer record the number of the feedback pulses of the motor; recording the actual interrupt times of the pulse timing timers corresponding to the N feedback pulses in the Kth sampling period; computing the conduction time of the next bidirectional triode thyristor; setting the time interval that the bidirectional triode thyristor controls the output of pulse high levels; and respectively setting high levels or low levels output by a control end of the bidirectional triode thyristor. The method is utilized to conveniently design a control program of a PG motor in an electrical product especially an air conditioner and divide supply air from the air conditioner into multiple gears of air volume levels. The air volume at each gear can be adjusted freely, thus solving the problems that the PG motor is slow in speed regulation and unstable in overshooting.

Description

Technical field [0001] The present invention relates to a control method of a motor, specifically, a control method of a PG motor. Background technique [0002] For household air conditioners, especially wall-mounted air conditioners, the indoor air supply device is generally a tap motor or a PG motor. The operation of the fan is controlled by an MCU (microprocessor) to realize the automatic air supply of the indoor fan. [0003] Among them, the air supply of the tapped motor is generally divided into several levels, such as high wind, medium wind, and low score. Different leads are drawn from the inside of the motor. The MCU controls the opening and closing of the relay connected to it to realize the air supply of different air volumes, and the control is simple. When system engineers debug the refrigeration system, they often change the size, length, and air output of the capillary tube to make it meet the national standards while also meeting the cooling capacity and heating cap...

AI Technical Summary

Problems solved by technology

[0006] The invention provides a motor control method, which can conveniently design the control program of the PG motor in electrical products, especially air conditioners, and can divide the air supply of the air conditioner into gears with more air volume levels, and the wind speed of each gear can be changed arbitrarily , the air volume of each gear can be adjusted arbitrarily, solving the problems of slow speed regulation and unstable overshoot of the PG motor, and realizing fast and stable control of the PG motor

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