Electricity: motive power systems – Switched reluctance motor commutation control
Patent
1986-03-19
1987-06-09
Shoop, Jr., William M.
Electricity: motive power systems
Switched reluctance motor commutation control
318138, 318439, H02P 602
Patent
active
046722742
ABSTRACT:
A cylinder drive motor includes a magnetized annular member having a series of equally spaced apart alternating pole elements and an additional pole element located within an interval between successive ones of the pole elements of the series. The pole elements are detected by a single sensor and a sinusoidal signal is generated having a series of higher-amplitude peaks successively occurring in correspondence with the pole elements of the series and a lower-amplitude peak occurring within an interval between successive ones the higher-amplitude peaks in correspondence with the additional pole element. The sinusoidal signal is compared with first and second reference levels to generate a speed-related pulse signal representative of the frequency at which the higher-amplitude peaks cross the first reference level and a phase-related pulse signal representative of the timing at which said lower-amplitude peak crosses the second reference level. The speed-related pulse signal is converted to a voltage signal and combined with a phase error signal derived from the phase-related pulse signal. A current proportional to the combined signals is generated and sequentially supplied to the coils in response to the speed-related pulse signal.
REFERENCES:
patent: 4430603 (1984-02-01), Muller
patent: 4501997 (1985-02-01), Muller
patent: 4531079 (1985-07-01), Muller
Ro Bentsu
Shoop Jr. William M.
Victor Company of Japan Ltd.
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