초록 ▼

A device for controlling a 4-phase 8-stator pole/6 rotor pole switched reluctance machine includes a microcontroller, a converter circuit for energizing the stator windings of the switched reluctance machine, four Hall sensors adapted to detect rotor position to a resolution of 15 mechanical degrees

A device for controlling a 4-phase 8-stator pole/6 rotor pole switched reluctance machine includes a microcontroller, a converter circuit for energizing the stator windings of the switched reluctance machine, four Hall sensors adapted to detect rotor position to a resolution of 15 mechanical degrees, a phase current sensor, and a phase voltage sensor. The controller is programmed to implement a rotor position estimator for generating an estimated rotor position signal corresponding to the position of the rotor. The estimator is implemented using an observer-based state variable motor model, and is responsive to the measured phase voltage, the measured phase current, and the transitions generated by the Hall sensors. The estimated rotor position signal is determined by running the observer model in parallel with the physical motor. The observer uses a phase current error signal, and a position error signal generated using the low resolution position transitions, to force the estimated rotor position state variable to converge. The generated estimated rotor position signal is substantially continuously-valued and is used by a commutation means programmed in the controller for controlling commutation of the machine phases.

대표청구항 ▼

A device for determining a position of a rotor associated with a switched reluctance machine of the type having a plurality of stator windings forming a plurality of corresponding machine phases, said device comprising: sensor means for generating a direct rotor position signal corresponding to an a

A device for determining a position of a rotor associated with a switched reluctance machine of the type having a plurality of stator windings forming a plurality of corresponding machine phases, said device comprising: sensor means for generating a direct rotor position signal corresponding to an actual position of said rotor; a rotor position estimator responsive to at least one measured machine operating characteristic, and said direct rotor position signal for substantially continuously generating an estimated rotor position signal indicative of the position of said rotor; and, wherein said rotor has a first predetermined number of poles, said machine has a second predetermined number of phases, and wherein said sensor means is operative to detect said rotor position and generate said direct rotor position signal at no finer resolution than one stroke angle, said stroke angle being determined as follows: stroke angle=(360/(said first predetermined number)*(said second predetermined number)).