Abstract
The major purpose of this thesis is to establish a PMSM drive equipped with front-end switch-mode rectifier (SMR) and to perform its driving performance study. First, the structure, governing equations, and equivalent circuit parameter estimation of a PMSM are studied. Then a DSP-based experimental PMSM drive is established with a robust ramp-comparison CCPWM control scheme being properly designed to yield excellent winding current tracking performance. And the normal operation of the established PMSM drive is verified experimentally. In the development of SMRs, a low-frequency (LF) SMR with suitable digital feedback control is first developed. Other related topics concerning the LF-SMR include IC-based analog control circuit, the switching control for reducing the current harmonic with acoustic noise frequencies, the soft switching control, etc. In addition, a hard- and a soft-switching HF-SMRs are also designed and implemented. Some measured key waveforms are provided to evaluate their normal operations and performances. Having established the PMSM drive equipped with front-end SMRs, the comparative performance studies are made for the whole drive system under PWM and PWM/PAM controls. The experimental results confirm that the front-end SMR may facilitate the PAM/PWM hybrid switching control to yield compromised performance requirements in wide speed range. These requirements include efficiency, torque ripple, drawn power quality, etc. And moreover, the HF-SMR yields better line drawn power quality compared with the LF-SMR.