Motor speed overshoot control system

Abstract

The invention discloses a motor speed overshoot control system. The motor speed overshoot control system comprises a controller and a power conversion module which is connected with the controller andan external motor load; the controller modulates duty cycle signals according to the given speed v0 to control the power conversion module so as to drive the motor load to run. The motor speed overshoot control system is characterized in that a delay parameter t is preset on the controller, according to the delay parameter t, the controller delays the switch-on interval of the duty cycle signalsper phase by the delay parameter t to a braking interval so as to restrain the overshoot of the motor load. The braking effect caused by the system is automatically enhanced along with increasing of the motor speed, separate calculation of software is not required, accordingly, the speed overshoot is restrained, the performance requirements of the system for hardware are reduced, the complexity ofdebugging parameters is simplified, and under the working condition that the speed feedback response is very slow at a low speed, the effect is particularly obvious.

Description

technical field [0001] The invention relates to a motor control system, in particular to a control system for dealing with motor speed overshoot. Background technique [0002] In the traditional motor speed control system, it is generally composed of a controller and a power conversion module. The controller controls the power conversion module to drive the motor load to run according to the given speed v0 modulation duty ratio signal. According to the different control objects, it is generally divided into three types: A feedback control loop, namely position loop, speed loop, current loop (also called torque loop). When the control object is the output torque of the motor, only one current loop is needed; when the braking object is the motor speed, the loop can only have the speed loop or the current loop can be used as the inner loop, and the speed loop can be used as the outer loop. When the control object is the relative position of the stator and rotor of the motor, t...

AI Technical Summary

Problems solved by technology

[0007] If the performance level of the hardware platform is high and the system inertia is large, it has a good effect, but if the system is limited by the cost and the system inertia is small, the above method is difficult to achieve the expected performance and effect.

[0008] In the traditional control method, because the loop response speed is positively correlated with the hardware processing speed and feedback speed, in order to achieve a better effect, the cost of hardware needs to be increased, and more parameter calculations need to be performed. There are many combinations of loop parameters, and debugging is difficult. large, making the traditional control method very complicated and prone to control disorder

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