H - Electricity – 02 – P
Patent
H - Electricity
02
P
318/108
H02P 27/02 (2006.01)
Patent
CA 1214206
SPEED REDUCING CONTROL SYSTEM FOR A POLYPHASE ELECTRIC MOTOR ABSTRACT OF THE DISCLOSURE A variable speed 3-phase a-c motor is connected to a 3-phase source of alternating voltage via five controllable bidirectional solid state switches which are so arranged and controlled that motor speed can be reduced by skipping selected cycles of the source voltage. For example, for half speed operation three of the switches are arranged respectively to connect phases A, B and C of the source to phases A, C and B of the motor, and over two consecutive periods of the source voltage three separate, uniformly spaced "firing windows" are selected during which the conducting states of these switches are initiated in a predetermined pattern that results in the phase A-to-phase B source voltage being applied to the motor during the first window, the phase C-to-phase A source voltage being applied during the next window, and the phase B-to-phase C source voltage being applied during the last window.
464173
Company General Electric
Eckersley Raymond A.
LandOfFree
Speed reducing control system for a polyphase electric 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 Speed reducing control system for a polyphase electric motor, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Speed reducing control system for a polyphase electric motor will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-1331567