Abstract
How to automatically correct controller para- metric mismatch and improve motor current closed-loop bandwidth in gain scheduling is an important issue for general motor drives. This paper firstly introduces the frequency domain tuning method of current controller. Then, the time delay identification and model parameters self-correction method based on frequency sweep is introduced to avoid the influence caused by parameter mismatch between plant and controller model. On this basis, phase lead module combined with active resistance term, is designed as a prefilter for current regulator, so as to achieve faster current dynamic response and improve disturbance rejection. Finally, the parameter setting for proposed current regulator is introduced to better practice. Experiments for different permanent magnet synchronous machines are carried out on a miniature drive system, the results fully verify the effectiveness of proposed scheme.
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