Motor driver and refrigeration cycle equipment
AssigneeMitsubishi Electric Corporation
InventorsShinya TOYODOME, Kazunori HATAKEYAMA, Yuichi SHIMIZU
Life of this patent
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Abstract
There are provided an inverter connected to n (n being as integer not less than 2) motors each including a rotor having a permanent magnet and capable of driving the n motors, and a connection switching device to switch a connection state of at least one motor of the n motors and the inverter between connection and disconnection. While the n motors are connected to the inverter and driven by the inverter, when an abnormality is detected in the at least one motor, the connection switching device switches the connection state to the disconnection and the inverter drives the n motors except the at least one motor.
Claims16
A motor driver comprising:
- an inverter connected to n motors each including a rotor having a permanent magnet and capable of driving the n motors, n being an integer not less than 2;
- and
- a connection switching device to switch a connection state of at least one of the n motors and the inverter between connection and disconnection,
- wherein while the n motors are connected to the inverter and driven by the inverter, when an abnormality is detected in the at least one motor, the connection switching device switches the connection state to the disconnection and the inverter drives the n motors except the at least one motor, and
- wherein when the inverter drives the n motors except the at least one motor, the inverter increases a rotational frequency compared to when the inverter drives the n motors.
(canceled)
Dependencies are inferred from the claim text.