H - Electricity – 02 – P
Patent
H - Electricity
02
P
H02P 8/22 (2006.01) G04C 3/14 (2006.01) H02P 8/16 (2006.01) H02P 8/34 (2006.01)
Patent
CA 2302171
The method consists in subdividing each driving pulse into a certain number of elementary periods of the same duration, in calculating directly or indirectly, at each elementary period, the value of an effective chopping rate He such that He = n1/n2 where n1 is the number of elementary periods during which the coil of the motor was connected to an electric power source from the beginning of the driving pulse and n2 is the total number of these elementary periods from the beginning of the driving pulse, in comparing this effective chopping rate He to the desired chopping rate Hc and, according to whether He ~ Hc or He > Hc, in connecting or not connecting the motor coil to the power source from the beginning of the following elementary period. The device includes the means necessary for implementing this method. This method and this device allow the number of distinct rates available for chopping the driving pulses to be increased in a much simpler way than with known methods and devices.
Eta Sa Fabriques D'ebauches
Gowling Lafleur Henderson Llp
LandOfFree
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