Method and apparatus for controlling switched reluctance motor and compressor
AssigneeKabushiki Kaisha Toyota Jidoshokki
InventorShoichi Ieoka
Life of this patent
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Abstract
A method for controlling a switched reluctance motor includes controlling an applied voltage to supply constant current to each of the coils of the switched reluctance motor in order of rotation; and determining a switching timing for switching the phases of the coils such that the switching to an exited phase occurs when the variation amount of the applied voltage to the coil having the exited phase is substantially zero.
Claims17
A method for controlling a switched reluctance motor having a plurality of coils, each of which cycles through a cycle of phases including an excited phase, the method comprising the steps of:
- controlling an applied voltage to supply constant current to each of the coils of the switched reluctance motor in order of rotation;
- and
- determining a switching timing for switching the phases of the coils such that the switch to the exited phase occurs when the variation amount of the applied voltage to the coil having the exited phase is substantially zero.
A controller located in a switched reluctance motor having a plurality of phases, wherein the switched reluctance motor has a plurality of coils, each of which cycles through a cycle of phases including an excited phase, the controller comprising:
- a first detector for detecting the current supplied to the coils;
- a second detector for detecting the voltage applied to the coils;
- an inverter for generating the current supplied to the coils;
- and
- an inverter controlling device, wherein the inverter controlling device controls the inverter such that the current value is constant, and wherein the inverter controlling device controls the inverter to switch the excited phases when the applied voltage is less than or equal to a predetermined value that is determined based on the product of the resistance of the coil corresponding to the applied voltage and the current value detected by the first detector.
A compressor including a switched reluctance motor having a plurality of phases, wherein the switched reluctance motor has a plurality of coils, each of which cycles through a cycle of phases including an excited phase, and wherein the switched reluctance motor includes a controller, the controller comprising:
- a first detector for detecting the current supplied to the coils;
- a second detector for detecting the voltage applied to the coils;
- an inverter for generating the current supplied to the coils;
- and
- an inverter controlling device wherein the inverter controlling device controls the inverter such that the current value is constant, and wherein the inverter controlling device controls the inverter to switch the excited phases when the applied voltage is less than or equal to a predetermined value that is determined based on the product of the resistance of the coil corresponding to the applied voltage and the current value detected by the first detector, wherein the compressor forms a part of a refrigeration circuit of a vehicular air-conditioner, and wherein the switched reluctance motor is incorporated in a pulley, which transmits power from a vehicular engine to a drive shaft of the compressor.
Dependencies are inferred from the claim text.