Electricity: motive power systems – Battery-fed motor systems
Reexamination Certificate
2007-05-31
2009-08-18
Ro, Bentsu (Department: 2837)
Electricity: motive power systems
Battery-fed motor systems
C388S820000, C701S022000, C180S312000
Reexamination Certificate
active
07576500
ABSTRACT:
Methods and systems for operating a motor coupled to an electrical bus in a vehicle are provided. Selected resonant frequencies of the electrical bus are determined. The selected resonant frequencies include a low resonant frequency and a high resonant frequency. Power is provided to the motor through at least one switch operating at a switching frequency. The switching frequency is controlled as a function of a rate of operation of the motor. The function is characterized by one of a first substantially linear portion having a first slope when the switching frequency is less than or equal to a selected switching frequency and a second substantially linear portion having a second slope if the switching frequency is greater than the selected frequency, the selected switching frequency being greater than the low resonant frequency and a substantially linear portion having a y-intercept being greater than the low resonant frequency.
REFERENCES:
patent: 5332061 (1994-07-01), Majeed et al.
patent: 5694304 (1997-12-01), Telefus et al.
patent: 6840341 (2005-01-01), Fujikawa
patent: 7126299 (2006-10-01), Jackson
patent: 7292917 (2007-11-01), Kuang et al.
Anwar Mohammad N.
Hiti Silva
Patel Nitinkumar R.
Schulz Steven E.
Talarico Lisa M.
GM Global Technology Operations Inc.
Luo David S
Ro Bentsu
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