Electricity: motive power systems – Switched reluctance motor commutation control
Patent
1999-05-12
2000-06-27
Nappi, Robert E.
Electricity: motive power systems
Switched reluctance motor commutation control
318439, 318145, 322 20, 322 22, 322 24, H02P 506
Patent
active
06081084&
ABSTRACT:
An alternator having a sensorless power angle control includes a three phase stator winding and three stator winding outputs connected to a controlled full wave rectifier bridge with a dc output. The controlled full wave rectifier bridge includes upper MOSFET switches and lower MOSFET switches with body diodes. Operation of the alternator results in a three phase back EMF generated in the stator windings and phase voltages across each of the stator windings. The output of the alternator is increased by introducing a phase shift between the back EMF and the phase voltages, resulting in an optimized power angle. In order to provide a reference for the phase of the back EMF, a zero crossing detector is provided which monitors the zero voltage crossings across the body diodes of the lower MOSFET switches. The negative to positive zero voltage crossings across the body diodes of the lower MOSFET devices correspond to the negative to positive zero crossings of the three phase back EMF. With an indication of the zero crossings of the back EMF, the MOSFET switches of the controlled full wave rectifier bridge may be controlled to introduce a desired phase delay in each of the phase voltages. A phase delay between the back EMF and each of the phase voltages results in an optimized power angle and increased alternator output.
REFERENCES:
patent: 4399397 (1983-08-01), Kleinschmidt, Jr.
patent: 4791341 (1988-12-01), Brown et al.
patent: 5168207 (1992-12-01), Follmer
patent: 5294879 (1994-03-01), Freeman et al.
patent: 5378979 (1995-01-01), Lombardi
patent: 5384527 (1995-01-01), Rozman et al.
patent: 5510696 (1996-04-01), Naidu et al.
patent: 5625276 (1997-04-01), Scott et al.
patent: 5648705 (1997-07-01), Sitar et al.
patent: 5739652 (1998-04-01), Sriram
patent: 5764021 (1998-06-01), Gutsche
patent: 5773964 (1998-06-01), Peter
patent: 5793167 (1998-08-01), Liang et al.
Delco Remy America, Inc.
Fowler, II Russell E.
Leykin Rita
Nappi Robert E.
Taylor Jay G.
LandOfFree
Sensorless power angle control for a vehicle alternator does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Sensorless power angle control for a vehicle alternator, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Sensorless power angle control for a vehicle alternator will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1787217