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US 2021/0281196 A1Published application
Air conditioner
AssigneeMitsubishi Electric Corporation
InventorsYuichi SHIMIZU, Kazunori HATAKEYAMA
Life of this patent
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Abstract
There are provided a single inverter to generate a three-phase alternating-current voltage from a direct-current voltage; n motors connected in series to an output side of the inverter to generate power, n being an integer not less than 2; a moving unit to receive the power to be driven; and a controller to perform sensorless control on the basis of an induced voltage caused by the n motors.
Claims12
An air conditioner comprising:
- a single inverter to generate a three-phase alternating-current voltage from a direct-current voltage;
- n motors connected in series to an output side of the inverter to generate power, n being an integer not less than 2;
- a moving unit to receive the power to be driven;
- and
- a controller to perform sensorless control on a basis of an induced voltage caused by the n motors.
2 more elements
An air conditioner comprising:
- a single inverter to generate a three-phase alternating-current voltage from a direct-current voltage;
- two motors to receive the three-phase alternating-current voltage to generate power;
- a switching unit to switch between a multiple connection in which the two motors are connected in series to an output side of the inverter and a single connection in which only one of the two motors is connected to the output side of the inverter;
- a moving unit to receive the power to be driven;
- and
- a controller to perform sensorless control on a basis of an induced voltage caused by the two motors in the multiple connection and on a basis of an induced voltage caused by the one motor in the single connection.
3 more elements
An air conditioner comprising:
- a single inverter to generate a three-phase alternating-current voltage from a direct-current voltage;
- n motors to receive the three-phase alternating-current voltage to generate power, n being an integer not less than 2;
- a switching unit to switch between a series connection in which the n motors are connected in series to an output side of the inverter and a parallel connection in which the n motors are connected in parallel to the output side of the inverter;
- a moving unit to receive the power to be driven;
- and
- a controller to perform sensorless control on a basis of an induced voltage caused by the n motors.
3 more elements
Dependencies are inferred from the claim text.