A motor speed overshoot control system

Abstract

The invention discloses a motor speed overshoot control system, which includes a controller and a power conversion module, the power conversion module is respectively connected with the controller and an external motor load, and the controller controls the power conversion by modulating a duty cycle signal according to a given speed v0 The module drives the motor load to run; it is characterized in that: the controller is preset with a delay parameter t, and the controller delays the delay parameter t from the energization interval of each phase duty ratio signal to the braking interval according to the delay parameter t In order to suppress the overshoot of the motor load, the braking effect caused by this design is automatically enhanced with the increase of the motor speed, without separate calculation and processing by software, thereby suppressing the overshoot of the speed, reducing the performance requirements of the system on the hardware, and simplifying the complexity of debugging parameters , at low speed, the speed feedback response is particularly slow, and 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...

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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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