H - Electricity – 02 – K
Patent
H - Electricity
02
K
H02K 29/06 (2006.01) H02K 16/00 (2006.01) H02K 21/12 (2006.01) H02K 29/00 (2006.01)
Patent
CA 2083270
2083270 9120120 PCTABS00009 A dual voltage direct current permanent magnet brushless motor operated by sequential and alternate pulses to two rows of stator coils (3, 9) radially and equally positioned in the stator (5) assembly to interact with two rows of permanent magnets (7, 10) equally spaced on the rotor (1). All the permanent magnets in one row are poled opposite to all the permanent magnets in the other row and total one less than the number of stator coils in each row. The reversal of poles of one row of permanent magnets on the rotor (1), along with the equal and opposite voltage permits the back electromotive force from a de-energizing stator coil in the first row to feed energy to the next stator coil positioned on the opposite site of the rotor (and vice versa) which interact with the reverse poled permanent magnet to produce only useful torque. Additional energy will be drawn from the battery as required to maintain the speed and torque requirement of the motor. The pulse to each stator is controlled by individual photocell detectors or Hall effect devices. The arrangement and control of the stator coils also permits power generation in the braking mode. The dual equal and opposite drive voltage permits the use of identical solid state switching devices in each side of the circuitry as well as utilization of the lowest possible peak inverse voltage rated devices as a result of the connection used between the stator coils.
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