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US 12,119,770 B2Granted
Motor apparatus and method for driving motor apparatus
AssigneesOsaka University, Kabushiki Kaisha A.H.Motorlab
InventorsNoboru Niguchi, Nozomu Takemura
Life of this patent
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Abstract
A motor apparatus and a method for driving the motor apparatus capable of reducing the number of switches while individually controlling each phase of a switched reluctance motor having two systems of three-phase windings provided to one rotor.
Claims17
A motor apparatus comprising:
- a motor unit including a rotor that is rotatably disposed about an axis of rotation and a stator having an inner periphery on which a plurality of teeth parts is formed;
- a switch inverter unit configured to supply electric power to the motor unit;
- and
- a switch control unit configured to control each switch included in the switch inverter unit;
- wherein the rotor is formed of a ferromagnetic material and is a switched reluctance motor,
- wherein a three-phase winding of a first system and a three-phase winding of a second system are wound around the plurality of teeth parts,
- wherein the switch inverter unit includes three switch groups connected in parallel, each of which having an upper switch, a middle switch, and a lower switch that are connected in series between a first potential and a second potential,
- wherein the switch control unit has a vector control mode for sending a control signal to each of the first system and the second system of the switch inverter unit based on three-phase vector control,
- wherein the vector control mode is configured to generate a pulsed signal by comparing signal waves and carrier waves and perform modulation control on each of the switches by way of PWM (Pulse Width Modulation),
- wherein the signal waves have same phases for the first system and the second system and have amplitudes that are offset from one another, and
- wherein an amount of the offset is within a range of the amplitudes of one another.
8 more elements
A method for driving a motor apparatus that rotates by an output from an inverter switch unit having first and second systems of three-phase windings provided to one rotor, the rotor being formed of a ferromagnetic material and being a switched reluctance motor, the method comprising:
- a current value acquisition step that acquires an electric current value of each phase of the first and second systems;
- a command voltage calculation step that calculates a first command voltage with respect to the first system and a second command voltage with respect to the second system based on the electric current value of each phase;
- a gate signal determination step that determines a gate signal with respect to the first system and the second system by comparing a voltage of a carrier wave with the first command voltage and the second command voltage;
- and
- an inverter switch control step that determines an on signal/off signal of the inverter switch unit based on the gate signal;
- wherein the first command voltage and the second command voltage have a same phase and have amplitudes that are offset from one another;
- and
- wherein an amount of the offset is within a range of the amplitudes of one another.
5 more elements
Dependencies are inferred from the claim text.