Startup control method and startup control system for PG speed regulating motor

Abstract

The invention discloses a startup control system for a PG speed regulating motor. The startup control system comprises a rotating speed detector, a rotating speed feedback module, a motor drive conversion module and a controller, wherein the rotating speed detector is used for detecting the rotating speed of the PG speed regulating motor in real time; the rotating speed feedback module is connected with the rotating speed detector; the motor drive conversion module is connected with the PG speed regulating motor and a positive electrode of inputted alternating current; the controller is used for outputting a control signal to the motor drive conversion module so as to enable the PG speed regulating motor to be started after first effective voltage is obtained; the controller is respectively connected with the rotating speed feedback module and the motor drive conversion module; when the rotating speed of the PG speed regulating motor is larger than first preset rotating speed, the controller is used for regulating the control signal to adjust the rotating speed of the PG speed regulating motor. According to the startup control system, the low-frequency electromagnetic noise can be reduced in the quick startup of the PG speed regulating motor, and the overshoot phenomenon in the startup process of the PG speed regulating motor is prevented. The invention further discloses a startup control system for the PG speed regulating motor.

Description

Technical field [0001] The present invention relates to the technical field of motor control, in particular to a start control method of a PG speed regulating motor and a start control system of a PG speed regulating motor. Background technique [0002] High-power (for example, 60-120 watts) plastic-encapsulated PG speed-regulating motors have a larger structure than small-power (15-60 watts) plastic-encapsulated motors. In this way, the motor manufacturer is difficult to control the distance between the motor shaft and the motor bearing due to the limitation of the production process, and the large size of the motor also affects the concentricity of the motor, which makes many high-power PG speed-regulating motors on the market run at low speed ( Less than 300 rpm), the motor itself emits unpleasant low-frequency electromagnetic noise, which affects the comfort of users. Summary of the invention [0003] The purpose of the present invention is to at least solve the above technic...

AI Technical Summary

Problems solved by technology

In this way, it is difficult for the motor manufacturer to control the distance between the motor shaft and the motor bearing due to the limitation of the production process, and the large size of the motor also affects the concentricity of the motor. less than 300 rpm), the motor itself emits unpleasant low-frequency electromagnetic noise, which affects the comfort of users

Images