Electricity: motive power systems – Positional servo systems – Pulse-width modulated power input to motor
Patent
1999-02-23
2000-10-24
Ip, Paul
Electricity: motive power systems
Positional servo systems
Pulse-width modulated power input to motor
318138, 318254, 318439, H02P 700, H02P 608, H02P 614
Patent
active
061372536
ABSTRACT:
A method is for driving a multiphase brushless motor with N windings connected in a star or in a polygonal configuration. The windings are driven according to a certain periodic voltage profile. The method includes cyclically keeping for a certain time interval at least one of the N windings in a fixed state of low or high saturation and applying to the other phase windings instantaneous voltages according to a predefined different periodic voltage profile such that the resultant voltages on the windings are coherent with the certain periodic voltage profile. The number of intervals, in an entire electrical period, in which the fixed high or low saturation state of one winding is produced, depends on the predefined driving profile and upon the number N of windings of the motor.
REFERENCES:
patent: 5283510 (1994-02-01), Tamaki et al.
patent: 5296796 (1994-03-01), Clower
patent: 5589746 (1996-12-01), Lewis
patent: 5793180 (1998-08-01), Maiocchi et al.
Patent Abstracts of Japan, vol. 096, No. 004, Apr. 30, 1996 and JP 07 327393A (Sanyo Electric Co., Ltd.), Dec. 12, 1995.
Boscolo Michele
Galbiati Ezio
Viti Marco
Galanthay Theodore E.
Ip Paul
STMicroelectronics S.r.l.
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