数字矢量控制和直接力矩控制调速系统中的电压模型

Voltage Model of Digital Vector Control and Direct Torque Control Systems

一种新的观测交流电动机磁链幅值和位置角的电压模型,它能解决传统电压模型中纯积分漂移问题及由数字控制引起的滞后问题,直接输出磁链幅值和瞬时角度,方便矢量控制和直接力矩控制使用,并可用于同步电动机的初始定位。

A new voltage model(VM) which can accurately measure amplitude and instantaneous position angle of flux linkage vector of an AC motor is introduced. The features of the new VM are that it can suppress the drift of pure integrator and compensate the lag caused by digital control in a traditional VM. It is easy to be used to vector control systems and direct torque control systems since the amplitude and position angle of the flux vector instead of its a and b components are outputs of the VM. Besides,the new VM can be used for initial orientation of a synchronous motor.