Electricity: motive power systems – Synchronous motor systems – Hysteresis or reluctance motor systems
Patent
1995-06-07
1997-07-29
Masih, Karen
Electricity: motive power systems
Synchronous motor systems
Hysteresis or reluctance motor systems
318715, 318721, 318560, 318613, 318254, 318138, 318439, H02P 146
Patent
active
056524943
ABSTRACT:
A circuit and method for controlling a switched reluctance drive having at least one phase winding and a rotor position encoder that provides a set of signals corresponding to the absolute position of the rotor relative to the stator. The circuit monitors the set of signals and generates a high frequency clock signal having a frequency substantially proportional to the frequency at which the set of signals changes state. The high frequency clock signal comprises a number of digital pulses for each rotor revolution that is an integral multiple of the number of digital pulses from the rotor position transducer for each rotor revolution and corresponds to the incremental position of the rotor. The high frequency clock signal is applied to a counter that is reset upon each change in state of the set of signals. The output of the counter is compared to predetermined values and the at least one phase winding is energized and de-energized in response to the results of the comparison.
REFERENCES:
patent: 4870559 (1989-09-01), Hyatt
patent: 4980939 (1991-01-01), Souji et al.
patent: 5013988 (1991-05-01), Sakano
patent: 5457371 (1995-10-01), Gordon
patent: 5491391 (1996-02-01), Bahr et al.
Stephenson and Blake, The Characteristics, Design and Applications of Switched Reluctance Motors and Drives, (Jun. 1993, Nuremberg, Germany).
Chappell et al., Microprocessor Control of a Variable Reluctance Motor, Mar. 1984, pp. 51-60, vol. 131, No. 2., IEE Proceedings.
Masih Karen
Switched Reluctance Drives Ltd.
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