Control apparatus of rotary electric machine and electric power steering apparatus using the same
First Claim
1. An apparatus for controlling a rotary electric machine provided with a first winding group and a second winding group, the apparatus comprising:
- a first inverter connected to the first winding group, the first inverter including a plurality of first switching elements;
a second inverter connected to the second winding group, the second inverter including a plurality of second switching elements;
a first voltage detector that detects a first inverter input voltage entering the first inverter;
a second voltage detector that detects a second inverter input voltage entering the second inverter;
a first control unit that controls ON/OFF operation of the first switching elements; and
a second control unit that controls ON/OFF operation of the second switching elements,whereinthe first control unit limits a first current command value related to a current flowing through the first winding group, when both of the first inverter input voltage and the second inverter input voltage are in a normal condition, and a first differential value, which is obtained by subtracting the first inverter input voltage from the second inverter input voltage, is larger than a determination threshold; and
the second control unit limits a second current command value related to a current flowing through the second winding group, when both of the first inverter input voltage and the second inverter input voltage are in a normal condition, and a second differential value, which is obtained by subtracting the second inverter input voltage from the first inverter input voltage, is larger than the determination threshold.
1 Assignment
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Accused Products
Abstract
An apparatus for controlling a rotary electric machine includes: first and second inverters corresponding to first and second winding groups; first and second voltage detectors; and first and second control units. Each of the first and second inverters includes plurality of switching elements. The first and second voltage detectors each detects input voltage of corresponding inverter. The first control unit limits a first current command value of the first winding group, when both of the first and second inverter input voltages are in normal, and a first differential value is larger than a determination threshold, and the second control unit limits a second current command value of the second winding group, when both of the first and second inverter input voltages are normal, and a second differential value is larger than the determination threshold.
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Citations
7 Claims
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1. An apparatus for controlling a rotary electric machine provided with a first winding group and a second winding group, the apparatus comprising:
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a first inverter connected to the first winding group, the first inverter including a plurality of first switching elements; a second inverter connected to the second winding group, the second inverter including a plurality of second switching elements; a first voltage detector that detects a first inverter input voltage entering the first inverter; a second voltage detector that detects a second inverter input voltage entering the second inverter; a first control unit that controls ON/OFF operation of the first switching elements; and a second control unit that controls ON/OFF operation of the second switching elements, wherein the first control unit limits a first current command value related to a current flowing through the first winding group, when both of the first inverter input voltage and the second inverter input voltage are in a normal condition, and a first differential value, which is obtained by subtracting the first inverter input voltage from the second inverter input voltage, is larger than a determination threshold; and the second control unit limits a second current command value related to a current flowing through the second winding group, when both of the first inverter input voltage and the second inverter input voltage are in a normal condition, and a second differential value, which is obtained by subtracting the second inverter input voltage from the first inverter input voltage, is larger than the determination threshold. - View Dependent Claims (2, 3, 4, 5, 6)
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7. An electric power steering apparatus comprising:
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a rotary electric machine provided with a first winding group and a second winding group, the rotary electric machine outputting an auxiliary torque that assists a steering operation of a driver; an apparatus for controlling the rotary electric machine, including; a first inverter connected to the first winding group, the first inverter including a plurality of first switching elements; a second inverter connected to the second winding group, the second inverter including a plurality of second switching elements; a first voltage detector that detects a first inverter input voltage entering the first inverter; a second voltage detector that detects a second inverter input voltage entering the second inverter; a first control unit that controls ON/OFF operation of the first switching elements; and a second control unit that controls ON/OFF operation of the second switching elements, wherein the first control unit limits a first current command value related to a current flowing through the first winding group, when both of the first inverter input voltage and the second inverter input voltage are in a normal condition, and a first differential value, which is obtained by subtracting the first inverter input voltage from the second inverter input voltage, is larger than a determination threshold; and the second control unit limits a second current command value related to a current flowing through the second winding group, when both of the first inverter input voltage and the second inverter input voltage are in a normal condition, and a second differential value, which is obtained by subtracting the second inverter input voltage from the first inverter input voltage, is larger than the determination threshold; and a power transmission member that transmits a rotation of the rotary electric machine to a driving object.
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Specification