A TMS32010 based near optimized pulse width modulated waveform generator

A description is given of a system for dynamically calculating optimized pulsewidth-modulated (PWM) waveforms for use with voltage-source-inverter-fed induction motor drives in railway traction applications. A TMS32010 signal processing microprocessor, capable of fast arithmetic, is interfaced to novel random-access memory-based waveform-generating hardware. This provides the capability of control line waveform detail that is impossible with more conventional microprocessor-based systems. Although the authors concentrate on the implementation of a particular algorithm, the design can implement variable pulse widths in multiphase systems and in real time. An important aspect of this work is the role played by microprocessor simulation in testing the design.<>