Method for commutating an electronically commutated DC...

Details Method for commutating an electronically commutated DC... Method for commutating an electronically commutated DC...

2005-09-06

2005-09-06

Ip, Paul (Department: 2837)

Electricity: motive power systems

Limitation of motor load, current, torque or force

C318S254100, C318S434000

Reexamination Certificate

active

06940243

ABSTRACT:
An improved method of commutating an electronically commutated DC motor shuts off application of power between the end of one current pulse and the beginning of the subsequent current pulse. Based upon the instantaneous rotation speed, one calculates at what instant to shut off the power. During the power interruption, the disconnected winding is operated in short-circuit mode using two MOSFET transistors, and the decay of the current is monitored. When the current reaches a predetermined reduced value, the terminals of the winding are switched to a high-resistance state, until the subsequent current pulse is started. This has the advantage that less reactive power occurs during operation, and one need not install as bulky a storage capacitor as the capacitors used heretofore.

REFERENCES:
patent: 4542323 (1985-09-01), Doemen
patent: 4581565 (1986-04-01), Van Pelt et al.
patent: 4677356 (1987-06-01), Tsuneda et al.
patent: 4924158 (1990-05-01), Kelley et al.
patent: 4933621 (1990-06-01), MacMinn et al.
patent: 5202830 (1993-04-01), Tsurumiya et al.
patent: 5296787 (1994-03-01), Albrecht et al.
patent: 5444622 (1995-08-01), Takeshima et al.
patent: 5537015 (1996-07-01), Karwath
patent: 5642247 (1997-06-01), Giordano
patent: 5708578 (1998-01-01), Stoddard et al.
patent: 5732373 (1998-03-01), Endo
patent: 5784270 (1998-07-01), Permuy
patent: 5801504 (1998-09-01), Endo et al.
patent: 5814957 (1998-09-01), Yoshida
patent: 5894206 (1999-04-01), Noro et al.
patent: 5903128 (1999-05-01), Sakakibara et al.
patent: 5912539 (1999-06-01), Sugitani et al.
patent: 5920174 (1999-07-01), Kawada et al.
patent: 6212447 (2001-04-01), Kohge et al.
patent: 6226580 (2001-05-01), Noro et al.
patent: 6249094 (2001-06-01), Zeh et al.
patent: 6390064 (2002-05-01), Marumoto et al.
patent: 6497303 (2002-12-01), Nishimura et al.
patent: 6559689 (2003-05-01), Clark
patent: 6563284 (2003-05-01), Teutsch et al.
patent: 6678177 (2004-01-01), Asano et al.
patent: 2001/0048278 (2001-12-01), Young et al.
patent: 41 24 240 (1993-01-01), None
patent: 0 397 514 (1990-11-01), None
patent: 0 831 580 (1998-03-01), None
patent: 9-271 198 (1997-10-01), None
Patent Abstracts of Japan, English abstract of unexamined publication JP 9-271 198-A, Obayashi, based on application JP 9-010 601 filed Jan. 23, 1997.
Derwent English Abstract of EP 0 831 580, Zeh, no date.

Affiliated with

Also associated with

Rating

Method for commutating an electronically commutated DC... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method for commutating an electronically commutated DC..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for commutating an electronically commutated DC... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3424757