Methods, systems and apparatus for adjusting duty cycle of pulse width modulated (PWM) waveforms
Patent
·
OSTI ID:1083973
Embodiments of the present invention relate to methods, systems and apparatus for controlling operation of a multi-phase machine in a vector controlled motor drive system when the multi-phase machine operates in an overmodulation region. The disclosed embodiments provide a mechanism for adjusting a duty cycle of PWM waveforms so that the correct phase voltage command signals are applied at the angle transitions. This can reduce variations/errors in the phase voltage command signals applied to the multi-phase machine so that phase current may be properly regulated thus reducing current/torque oscillation, which can in turn improve machine efficiency and performance, as well as utilization of the DC voltage source.
- Research Organization:
- NETL (National Energy Technology Laboratory, Pittsburgh, PA, and Morgantown, WV (United States))
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- FC26-07NT43123
- Assignee:
- GM Global Technology Operations LLC (Detroit, MI)
- Patent Number(s):
- 8,446,117
- Application Number:
- 12/983,669
- OSTI ID:
- 1083973
- Country of Publication:
- United States
- Language:
- English
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