Motor control method and control device

Abstract

The invention discloses a motor control method, which comprises the steps of (S2) detecting a rotating speed of the motor, judging whether the rotating speed of the motor reaches a corresponding standard rotating speed or not according to a standard curve of the motor startup time and a standard rotating speed, if so, entering the step (S2), and or else, entering the step (S3); (S2) making the motor continuously run for first scheduled time and then returning to the step (S1); and (S3) making the motor continuously run for second scheduled time and stop, restarting the motor after stopping for third scheduled time and returning to the sep (S1). The invention further discloses a motor control device. The motor control device comprises a memory module, a detection module, a judgment module and a control module. Through the motor control method and the motor control device, the application range of a small motor can be expanded, and the limit of the temperature is avoided.

Description

technical field [0001] The invention relates to the field of motor control, in particular to a motor control method and a control device. Background technique [0002] The motor parameters determined during motor production are only valid within a certain temperature range, and when the temperature difference of the motor’s operating environment changes greatly, especially at low temperatures, some motor parameters (such as stator resistance, rotor resistance, etc.) There will be a large change, generally speaking, the change range can reach about 20%). For large motors, because the current and back electromotive force are large, in the calculation process of the motor torque and other results, due to the current and back electromotive force The difference of motor parameters such as relative stator and rotor resistance values ​​is large, and a certain range of changes in motor parameters will not have a significant impact on the results. Therefore, large motors rarely have ...

AI Technical Summary

Problems solved by technology

[0004] However, the cost and benefit of the first method are poor. In addition, in practical applications, small motors are often used in low temperature environments, so the applicability is also poor.

For the second method, because it is necessary to mark the motor parameters at different temperatures, and to use these parameters in practice, it is also necessary to monitor the motor temperature in real time, which is time-consuming and laborious

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