Electricity: motive power systems – Synchronous motor systems – Hysteresis or reluctance motor systems
Reexamination Certificate
2007-10-30
2007-10-30
Donovan, Lincoln (Department: 2837)
Electricity: motive power systems
Synchronous motor systems
Hysteresis or reluctance motor systems
C318S432000
Reexamination Certificate
active
11024520
ABSTRACT:
An electrical machine is controlled without using a physical rotor position detector. When more than one phase is used simultaneously to produce sufficient torque for the application, the increased leakage flux and the reduced permeability of parts of the magnetic circuit distort the information gleaned from diagnostic pulses. By storing sets of characterizing data appropriate to the number of phases in use, the control system is able to determine the rotor position more accurately.
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McClelland Michael Leo
Norman Rosemary Anne
Donovan Lincoln
Haynes and Boone LLP
Paul Antony
Switched Reluctance Drives Limited
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