Electricity: motive power systems – Switched reluctance motor commutation control
Patent
1982-08-18
1985-01-01
Truhe, J. V.
Electricity: motive power systems
Switched reluctance motor commutation control
318138, 318439, H02P 706, H02P 602
Patent
active
044917708
ABSTRACT:
In a brushless DC motor having a magnet (i.e.--a field flux generating means) and multiphase coils, a current is distributed from a DC voltage source to the multiphase coils by selectively activating a plurality of output transistors according to a set of output signals of a position detector. A distributor selectively activates the output transistors according to the output signals of the position detector. A command signal generator generates a command signal, and a low-pass filter is connected between the command signal generator and the distributor. A voltage detector detects voltage drops across the output transistors during each activated period and changes its output signal corresponding to the detected voltage drops when at least one of the voltage drops across the output transistors is smaller than a predetermined voltage. The input signal of the low-pass filter is corrected according to the output signal of the voltage detector, and the current supplied to the multiphase coils is decreased so as to prevent the output transistors from saturating. Thus, a current ripple which causes mechanical vibration and sounds can be effectively reduced.
REFERENCES:
patent: 3751676 (1973-08-01), Igarshi
patent: 3911338 (1975-10-01), Igarshi
patent: 4039911 (1977-08-01), Tanikoshi
patent: 4070606 (1978-01-01), Morozumi
patent: 4197489 (1980-04-01), Dunn
patent: 4292573 (1981-09-01), Ebert
patent: 4446406 (1984-05-01), Uzuka
Keane Patrick
Matsushita Electric - Industrial Co., Ltd.
Truhe J. V.
LandOfFree
Brushless DC motor does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Brushless DC motor, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Brushless DC motor will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-578922