Motor control device
AssigneeSanyo Electric Co., Ltd.
InventorYoshio Tomigashi
Life of this patent
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Abstract
A motor control device includes a current detecting portion that detects current flowing between an inverter for driving a three-phase motor and a DC power supply for supplying DC voltage to the inverter, a current estimator that estimates a current vector of the motor on a rotating coordinate that rotates along with rotation of a rotor of the motor. The motor control device detects motor current flowing in the motor by using one of a detecting result of the current detecting portion and an estimation result of the current estimator, so as to control the motor via the inverter based on the detected motor current. The current estimator estimates the current vector based on the motor current detected in the past and a specified voltage value, for example.
Claims8
A motor control device comprising:
- a current detecting portion that detects current flowing between an inverter for driving a three-phase motor and a DC power supply, as detected current;
- and
- a current estimator that estimates a current vector of the motor on a rotating coordinate that rotates along with rotation of a rotor of the motor,
- wherein
- the motor control device detects motor current flowing in the motor by using one of a detecting result of the current detecting portion and an estimation result of the current estimator, so as to control the motor via the inverter based on the detected motor current, and
- the current estimator estimates, by using the motor current detected at a first timing, the current vector at a second timing later than the first timing.
Dependencies are inferred from the claim text.