Motor control device
First Claim
1. A motor control device configured to drive a first motor that rotates a first rotation body and a second motor that rotates a second rotation body, the motor control device comprising:
- a power supply unit;
inverters configured to convert an output from the power supply unit to an alternating current and supply the output to the first motor and the second motor; and
a control unit configured to drive the second motor using rotor position sensorless control,the control unit being further configuredto not start up the second motor during a predetermined operation in which a large current flowing through the first motor is being performed, andsuch that a startup abnormality of the second motor is avoided by not starting up the second motor when the predetermined operation in which the large current flows through the first motor is being performed, wherein the startup abnormality is caused by a noise due to the large current flowing.
3 Assignments
0 Petitions
Accused Products
Abstract
A motor control device is configured to drive a first motor that rotates a first rotation body and a second motor that rotates a second rotation body. The motor control device includes a power supply unit, inverters configured to convert an output from the power supply unit to an alternating current and supply the output to the first motor and the second motor, and a control unit configured to drive the second motor using rotor position sensorless control. The control unit may be configured to not start up the second motor during a predetermined operation in which a large current flowing through the first motor is being performed.
10 Citations
16 Claims
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1. A motor control device configured to drive a first motor that rotates a first rotation body and a second motor that rotates a second rotation body, the motor control device comprising:
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a power supply unit; inverters configured to convert an output from the power supply unit to an alternating current and supply the output to the first motor and the second motor; and a control unit configured to drive the second motor using rotor position sensorless control, the control unit being further configured to not start up the second motor during a predetermined operation in which a large current flowing through the first motor is being performed, and such that a startup abnormality of the second motor is avoided by not starting up the second motor when the predetermined operation in which the large current flows through the first motor is being performed, wherein the startup abnormality is caused by a noise due to the large current flowing. - View Dependent Claims (5, 11, 14)
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2. A motor control device configured to drive a first motor that rotates a first rotation body and a second motor that rotates a second rotation body, the motor control device comprising:
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a power supply unit; inverters configured to convert an output from the power supply unit to an alternating current and supply the output to the first motor and the second motor; and a control unit configured to drive the second motor using rotor position sensorless control, the control unit including a determination unit configured to determine whether the second motor is in an abnormal state or not, and the control unit being further configured to cancel the determination of the determination unit even if the determination unit has determined that the inverter for the second motor is in an abnormal state when the second motor is in operation and the first motor performs a predetermined operation, and such that an unwanted abnormal shutdown of the second motor is prevented by canceling the determination that the inverter for the second motor is in an abnormal state and continuing operation of the second motor. - View Dependent Claims (6, 7, 8, 12, 15)
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3. A motor control device configured to drive a first motor that rotates a first rotation body and a second motor that rotates a second rotation body, the motor control device comprising:
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a power supply unit; inverters configured to convert an output from the power supply unit to an alternating current and supply the output to the first motor and the second motor; a control unit configured to drive the second motor using rotor position sensorless control; and a collective control unit configured to collectively control two or more control units including the control unit, the control unit including a determination unit configured to determine whether the second motor is in an abnormal state or not, and the control unit being further configured to perform a retry action of an operation of the inverter without notifying the collective control unit of an abnormal state even if the determination unit has determined that the inverter for the second motor is in an abnormal state when the second motor is in operation and the first motor performs a predetermined operation, and such that an unwanted abnormal shutdown of the second motor is prevented by not determining as abnormal and by retrying detection of an inverter current and the operation of the inverter for the second motor. - View Dependent Claims (4, 9, 10, 13, 16)
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Specification