An AC motor drive with power factor control for low cost applications

In this work, a new concept of integrating motor and power factor controls, by using a single-phase to three-phase DSP based six-switch converter topology, is presented. Unlike other configurations which use extra switch(es) and/or extra boost inductor, in the proposed topology the boost action, for input current shaping, is done by the motor leakage inductances. The power factor control and inverter operation are performed by applying two modulating signals to the SPWM control logic of the converter. In this paper, the converter operation and its accompanying control strategy are explained. Simulation and experimental results for a DSP based induction motor drive are provided, as proof of concept. Furthermore, the practicability and potential of this configuration for AC motor drive applications are established. The impact of this scheme on the machine operation is also discussed.

[1]  Prasad Enjeti,et al.  Economic single-phase to three-phase converter topologies for fixed and variable frequency output , 1993 .

[2]  P. Enjeti,et al.  A new single phase to three phase converter with active input current shaping for low cost AC motor drives , 1990, Conference Record of the 1990 IEEE Industry Applications Society Annual Meeting.

[3]  Jacobus Daniel van Wyk,et al.  A Comparative Investigation of a Three-Phase Induction Machine Drive with a Component Minimized Voltage-Fed Inverter under Different Control Options , 1984 .

[4]  J.-I. Itoh,et al.  Novel unity power factor circuits using zero-vector control for single-phase input system , 1999, APEC '99. Fourteenth Annual Applied Power Electronics Conference and Exposition. 1999 Conference Proceedings (Cat. No.99CH36285).

[5]  J. Itoh,et al.  Novel unity power factor circuits using zero-vector control for single-phase input systems , 2000 .

[6]  V.T. Ranganathan,et al.  A high switching frequency IGBT PWM rectifier/inverter system for AC motor drives operating from single phase supply , 1990, 21st Annual IEEE Conference on Power Electronics Specialists.

[7]  Deepak Divan,et al.  A novel single phase to three phase converter , 1991, [Proceedings] APEC '91: Sixth Annual Applied Power Electronics Conference and Exhibition.

[8]  H. van der Broeck,et al.  Analytical analysis of the harmonic effects of a PWM AC drive , 1988 .

[9]  Ramesh Oruganti,et al.  A unity power factor converter using half-bridge boost topology , 1998 .

[10]  Ned Mohan,et al.  Sinusoidal line current rectification with a 100kHZ B-SIT step-up converter , 1984, 1984 IEEE Power Electronics Specialists Conference.

[11]  A. W. Green,et al.  Current-forced single-phase reversible rectifier , 1989 .

[12]  W. Baumann,et al.  Nonlinear modelling of the PWM switch , 1988, PESC '88 Record., 19th Annual IEEE Power Electronics Specialists Conference.

[13]  Thomas G. Habetler,et al.  A space vector-based rectifier regulator for AC/DC/AC converters , 1993 .

[14]  R. Wu,et al.  A PWM AC to DC converter with fixed switching frequency , 1988, Conference Record of the 1988 IEEE Industry Applications Society Annual Meeting.