Electricity: motive power systems – Induction motor systems – Primary circuit control
Reexamination Certificate
2009-08-07
2011-12-20
Benson, Walter (Department: 2837)
Electricity: motive power systems
Induction motor systems
Primary circuit control
C318S720000, C318S400260, C361S016000, C180S053500, C180S060000, C180S065100, C180S065210
Reexamination Certificate
active
08080970
ABSTRACT:
A system and apparatus that allows the use of a 3-phase AC motor in a vehicle by associating a series capacitor with each phase winding. The capacitor can be charged through the motor winding and then switched to discharge through the winding in a resonant oscillatory mode. The capacitor values can be chosen so that the winding and capacitor in series resonates at approximately 60 Hz. Oscillations in each phase can be staggered by around 120 degrees. The charging and discharging is controlled by electronic SPDT switches that switch around 300 VAC/500 VDC at around 15 amps for each phase. With an average DC current of 20 amps from a 48 volt battery pack (four 12 volt batteries connected in series) and 75% discharge of the capacitors, the present invention can run a 7.5 HP, 3-phase, 240 VAC motor for approximately 3.5 hours or longer. A simple oscillator circuit can drive the switches at the resonant frequency.
REFERENCES:
patent: 3740629 (1973-06-01), Kohlhagen
patent: 4780619 (1988-10-01), Campbell et al.
patent: 4947053 (1990-08-01), Campbell et al.
patent: 5357181 (1994-10-01), Mutoh et al.
patent: 5481168 (1996-01-01), Mutoh et al.
patent: 5570279 (1996-10-01), Venkataramanan
patent: 5629603 (1997-05-01), Kinoshita
patent: 5831409 (1998-11-01), Lindberg et al.
patent: 5889428 (1999-03-01), Young
patent: 6278256 (2001-08-01), Aoyama
patent: 6333620 (2001-12-01), Schmitz et al.
patent: 6469469 (2002-10-01), Chambers et al.
patent: 6815934 (2004-11-01), Colley
patent: 2005/0127880 (2005-06-01), Colley
patent: 2008/0169138 (2008-07-01), Grand et al.
Benson Walter
Glass Erick
Kraft Clifford H.
LandOfFree
System and apparatus for use of a 3-phase motor in a vehicle does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with System and apparatus for use of a 3-phase motor in a vehicle, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and System and apparatus for use of a 3-phase motor in a vehicle will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4310288