Electricity: motive power systems – Switched reluctance motor commutation control
Patent
1987-09-08
1988-04-26
Ro, Bentsu
Electricity: motive power systems
Switched reluctance motor commutation control
318138, H02P 602
Patent
active
047407344
ABSTRACT:
A control apparatus for a brushless dc motor comprises: a parallel connection circuit including a plurality of series circuits connected in parallel; each series circuit having one armature coil and one field-effect transistor, one end of the parallel connection circuit being connected to one end of a dc power source; a free-wheeling diode connected across the parallel connection circuit; first semiconductor switch means connected between the other end of the parallel connection circuit and the other end of the dc power source; a plurality of second semiconductor switch means connected between respective gates of the field-effect transistors; and the one end of the dc power source; a plurality of reverse current blocking elements for preventing reverse currents from flowing into the second semiconductor switch means from the gates of the field-effect transistors; a plurality of comparators for detecting induced voltages developed across the armature coils; a drive circuit responsive to detection output signals from the comparators for sequentially driving the second semiconductor switch means so that the field-effect transistors are turned on and off to sequentially control the energization of the armature coils; and a rotor comprising a permanent magnet having a plurality of magnetic poles which is driven by magnetic fields produced by the sequential energization of the armature coils.
REFERENCES:
patent: 4250435 (1981-02-01), Alley et al.
patent: 4409524 (1983-10-01), Nielsen et al.
patent: 4455513 (1984-06-01), Fulton et al.
patent: 4495450 (1985-01-01), Tokizaki et al.
"Brushless Motor Drive for In-Tank Fuel Pump", General Motors Research Laboratories, 840445, pp. 57-63.
"P.M. Brushless Motor Drives", Proc. Annu. Symp. Incremental Motion Control System Devices, 9th., pp. 315-312.
"Microcomputer-Controlled Brushless Motor Without a Shaft-Mounted Position Sensor", Ipec-Tokyo 1983 pp. 1477-1488.
Nagata Masami
Takeuchi Kanji
Nippondenso Co. Ltd.
Ro Bentsu
LandOfFree
Control apparatus for brushless dc motors does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Control apparatus for brushless dc motors, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Control apparatus for brushless dc motors will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-821928