Method and apparatus for linearizing pulse width modulation by m

Details Method and apparatus for linearizing pulse width modulation by m Method and apparatus for linearizing pulse width modulation by m

1996-06-25

1998-04-07

Masih, Karen

Electricity: motive power systems

Positional servo systems

Pulse-width modulated power input to motor

318798815, 363 41, G05B 1128

Patent

active

057368252

ABSTRACT:
A method and/or apparatus for altering command voltages when a modulation index is greater than unity in order to maintain the linear relationship between the fundamental component of phase voltage and a sinusoidal command voltage in PWM inverter or converter usage. The method and/or apparatus calculates a command signal magnitude above which a command signal should be clamped to a peak carrier value in order to add volt-sec to an output phase voltage that are lost when the amplitude of the command signal exceeds that of a carrier signal. A modified command signal is provided which maintains said linear relationship.

REFERENCES:
patent: 5610806 (1997-03-01), Blasko et al.

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