CONTROL APPARATUS FOR ELECTRIC ROTATING MACHINE
First Claim
1. A control apparatus for use with an electric power conversion system which is equipped with a dc/ac converter connected to an electric rotating machine and a capacitor joined to input terminals of the dc/ac converter, comprising:
- an energizing controlling circuit that controls energization of the electric rotating machine through the dc/ac converter to discharge the capacitor so as to have a charged voltage lower than a given value; and
a current vector change control circuit that controls a change in direction of a vector of current in a fixed coordinate system which flows through the electric rotating machine, the change arising from a change in rotation angle of the electric rotating machine during control of the energization of the electric rotating machine.
1 Assignment
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Accused Products
Abstract
A control apparatus for use with an electric power conversion system which is equipped with a dc/ac converter connected to an electric rotating machine and a capacitor joined to input terminals of the dc/ac converter. The control apparatus stores an angle of rotation (i.e., start angle θ0) of the electric rotating machine before start of control of energization of the electric rotating machine to discharge the capacitor and determines command currents idr and iqr which will result in zero (0) torque in the electric rotating machine. The control apparatus includes a command current correcting circuit which corrects the command currents idr and iqr by a difference between a current angle θ of rotation of the electric rotating machine and the start angle θ0, thereby avoiding constant rotation of the electric rotating machine when the capacitor is discharged.
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Citations
6 Claims
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1. A control apparatus for use with an electric power conversion system which is equipped with a dc/ac converter connected to an electric rotating machine and a capacitor joined to input terminals of the dc/ac converter, comprising:
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an energizing controlling circuit that controls energization of the electric rotating machine through the dc/ac converter to discharge the capacitor so as to have a charged voltage lower than a given value; and a current vector change control circuit that controls a change in direction of a vector of current in a fixed coordinate system which flows through the electric rotating machine, the change arising from a change in rotation angle of the electric rotating machine during control of the energization of the electric rotating machine. - View Dependent Claims (2, 3, 4, 5, 6)
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Specification