Electricity: motive power systems – Open-loop stepping motor control systems
Patent
1989-05-12
1990-06-12
Shoop, Jr., William M.
Electricity: motive power systems
Open-loop stepping motor control systems
363 98, 363132, 363 64, 318701, 318685, 312163, H02P 800
Patent
active
049336215
ABSTRACT:
A method and apparatus are provided for controlling the switching devices in a switched reluctance machine bridge inverter having at least two switching devices per phase. One switching device is used for hysteresis band current chopping to regulate phase current magnitude, while the other switching device, in combination with a flyback diode, provides a circulating path for phase current. Alternatively, current chopping and circulating are alternated between both switching devices during each conduction interval of the corresponding machine phase. Ripple current is decreased, thereby reducing the required size of the DC link capacitor. Switching losses are also reduced.
REFERENCES:
patent: 4325095 (1982-04-01), Hart
patent: 4424557 (1984-01-01), Steigherwald
patent: 4672521 (1987-06-01), Rienes
patent: 4682093 (1987-07-01), Murphy et al.
patent: 4684867 (1987-08-01), Miller
patent: 4739240 (1988-04-01), MacMinn et al.
patent: 4835408 (1989-05-01), Ray et al.
Miller, T. J. E., Switched Reluctance Motor Drives, Intertec Communications, Inc., 1988, pp. 53-62.
MacMinn Stephen R.
Turnbull Fred G.
Bergmann Saul M.
Breedlove Jill M.
Davis Jr. James C.
General Electric Company
Shoop Jr. William M.
LandOfFree
Current chopping strategy for switched reluctance machines does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Current chopping strategy for switched reluctance machines, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Current chopping strategy for switched reluctance machines will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-619351