Title :
A unified analysis of DC link current in space-vector PWM drives
Author :
Chan, C.C. ; Chau, K.T. ; Li, Y. ; Chan, D.T.W.
Author_Institution :
Dept. of Electr. & Electron. Eng., Hong Kong Univ., Hong Kong
Abstract :
A unified analysis of the DC link current in space-vector PWM drives, comprising induction motor, inverter and space-vector PWM scheme, is presented. The DC link current is investigated in a unified way, whether the inverter is operating at normal or dead-time switching modes. The key is to introduce a dead-time vector, which is mathematically similar to the well-known space voltage vector, to express the DC link current and inverter output voltages into a unified form. Moreover, the formation of positive and negative spikes on the DC link current is discussed. In particular, the occurrence of negative spikes is mathematically formulated. The proposed unified approach is verified by means of both computer simulation and experimental results. The occurrence of positive and negative spikes is also verified by using circuit-oriented and device-oriented computer simulations as well as experimental results
Keywords :
PWM invertors; digital simulation; induction motor drives; simulation; switching circuits; DC link current; circuit-oriented computer simulation; computer simulation; dead-time switching mode; dead-time vector; device-oriented computer simulation; induction motor; inverter; inverter output voltages; negative spikes; normal switching mode; positive spikes; space-vector PWM drives; unified analysis; AC motors; Circuits; Computer simulation; Equations; Functional analysis; Pulse width modulation; Pulse width modulation inverters; Space vector pulse width modulation; Steady-state; Voltage;
Conference_Titel :
Power Electronics and Drive Systems, 1997. Proceedings., 1997 International Conference on
Print_ISBN :
0-7803-3773-5
DOI :
10.1109/PEDS.1997.627466
