MOTOR CURRENT CALCULATION DEVICE AND AIR CONDITIONING APPARATUS
First Claim
1. A motor current calculation device comprising:
- a first wire configured and arranged to carry flow ofa motor current that has been passed through a motor anda drive current that has been passed through a motor drive unit to drive the motor;
a current detecting unit configured and arranged to detect a sum of the motor current and the drive current flowing through the first wire;
a decision unit configured and arranged to determine a first detection result of the current detecting unit when the motor is not rotating as the drive current; and
a calculation unit configured to calculate the motor current by subtracting the drive current determined by the decision unit from a second detection result of the current detecting unit when the motor is rotating.
1 Assignment
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Accused Products
Abstract
A motor current calculation device includes a first wire, a current detecting unit, a decision unit, and a calculation unit. The first wire is configured and arranged to carry flow of a motor current that has been passed through a motor and a drive current that has been passed through a motor drive unit to drive the motor. The current detecting unit is configured and arranged to detect a sum of the motor current and the drive current flowing through the first wire. The decision unit is configured and arranged to determine a first detection result of the current detecting unit when the motor is not rotating as the drive current. The calculation unit is configured to calculate the motor current by subtracting the drive current determined by the decision unit from a second detection result of the current detecting unit when the motor is rotating.
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Citations
12 Claims
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1. A motor current calculation device comprising:
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a first wire configured and arranged to carry flow of a motor current that has been passed through a motor and a drive current that has been passed through a motor drive unit to drive the motor; a current detecting unit configured and arranged to detect a sum of the motor current and the drive current flowing through the first wire; a decision unit configured and arranged to determine a first detection result of the current detecting unit when the motor is not rotating as the drive current; and a calculation unit configured to calculate the motor current by subtracting the drive current determined by the decision unit from a second detection result of the current detecting unit when the motor is rotating. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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Specification