Control device of AC rotating machine and electric power steering device
First Claim
1. A control device of an AC rotating machine estimating, as an estimated rotational position, a rotational position of the AC rotating machine having N sets of three-phase windings, where N is a natural number equal to or greater than 2,the control device comprising:
- a current detector that detects and outputs N sets of currents respectively flowing in N sets of three-phase windings;
a controller that calculates and outputs respective N sets of voltage commands for the N sets of three-phase windings on the basis of a control command for the AC rotating machine and the N sets of currents input from the current detector; and
a power converter that applies AC voltage to the N sets of three-phase windings on the basis of the input N sets of voltage commands, whereinthe controller hasa voltage sum calculator that calculates and outputs a voltage sum from the input N sets of voltage commands;
a current sum calculator that calculates and outputs a current sum from the input N sets of currents; and
a rotational position estimator that calculates the estimated rotational position on the basis of the input voltage sum and the input current sum,wherein the voltage sum calculator calculates, as the voltage sum, a value resulting from multiplying, by N, any one of the N sets of voltage commands; and
the current sum calculator calculates, as the current sum, a value resulting from adding each of the N sets of currents.
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Abstract
This invention is concerning a control device of an AC rotating machine that estimates, as an estimated rotational position, a rotational position of an AC rotating machine having N sets of three-phase windings where N is a natural number equal to or greater than 2, the device being made up of: a voltage sum calculator that calculates a voltage sum from N sets of voltage commands for applying AC voltage to the N sets of three-phase windings; a current sum calculator that calculates a current sum from N sets of currents respectively flowing in the N sets of three-phase windings; and a rotational position estimator that calculates an estimated rotational position on the basis of calculation results of the voltage sum calculator and the current sum calculator.
67 Citations
9 Claims
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1. A control device of an AC rotating machine estimating, as an estimated rotational position, a rotational position of the AC rotating machine having N sets of three-phase windings, where N is a natural number equal to or greater than 2,
the control device comprising: -
a current detector that detects and outputs N sets of currents respectively flowing in N sets of three-phase windings; a controller that calculates and outputs respective N sets of voltage commands for the N sets of three-phase windings on the basis of a control command for the AC rotating machine and the N sets of currents input from the current detector; and a power converter that applies AC voltage to the N sets of three-phase windings on the basis of the input N sets of voltage commands, wherein the controller has a voltage sum calculator that calculates and outputs a voltage sum from the input N sets of voltage commands; a current sum calculator that calculates and outputs a current sum from the input N sets of currents; and a rotational position estimator that calculates the estimated rotational position on the basis of the input voltage sum and the input current sum, wherein the voltage sum calculator calculates, as the voltage sum, a value resulting from multiplying, by N, any one of the N sets of voltage commands; and the current sum calculator calculates, as the current sum, a value resulting from adding each of the N sets of currents. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A control device of an AC rotating machine estimating, as an estimated rotational position, a rotational position of the AC rotating machine having N sets of three-phase windings, where N is a natural number equal to or greater than 2,
the control device comprising: -
a current detector that detects and outputs N sets of currents respectively flowing in N sets of three-phase windings; a controller that calculates and outputs respective N sets of voltage commands for the N sets of three-phase windings on the basis of a control command for the AC rotating machine and the N sets of currents input from the current detector; and a power converter that applies AC voltage to the N sets of three-phase windings on the basis of the input N sets of voltage commands, wherein the controller has a voltage sum calculator that calculates and outputs a voltage sum from the input N sets of voltage commands; a current sum calculator that calculates and outputs a current sum from the input N sets of currents; and a rotational position estimator that calculates the estimated rotational position on the basis of the input voltage sum and the input current sum, wherein the voltage sum calculator calculates, as the voltage sum, a value resulting from adding each of the N sets of voltage commands; and the current sum calculator calculates, as the current sum, a value resulting from multiplying, by N, any one of the N sets of currents.
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8. A control device of an AC rotating machine estimating, as an estimated rotational position, a rotational position of the AC rotating machine having N sets of three-phase windings, where N is a natural number equal to or greater than 2,
the control device comprising: -
a current detector that detects and outputs N sets of currents respectively flowing in N sets of three-phase windings; a controller that calculates and outputs respective N sets of voltage commands for the N sets of three-phase windings on the basis of a control command for the AC rotating machine and the N sets of currents input from the current detector; and a power converter that applies AC voltage to the N sets of three-phase windings on the basis of the input N sets of voltage commands, wherein the controller has a voltage sum calculator that calculates and outputs a voltage sum from the input N sets of voltage commands; a current sum calculator that calculates and outputs a current sum from the input N sets of currents; and a rotational position estimator that calculates the estimated rotational position on the basis of the input voltage sum and the input current sum, wherein the controller has a current coordinate converter that calculates and outputs N sets of d-axis currents and N sets of q-axis currents respectively flowing in the N sets of three-phase windings, by coordinate conversion of the input N sets of currents into two rotating axes on the basis of the estimated rotational position; a current controller that calculates and outputs N sets of d-axis voltage commands and N sets of q-axis voltage commands, as the N sets of voltage commands, on the basis of the control command for the AC rotating machine, and on the basis of the input N sets of d-axis currents and N sets of q-axis currents; and a voltage coordinate converter that calculates and outputs N sets of three-phase voltage commands by coordinate conversion into two rotating axes of the input N sets of d-axis voltage commands and N sets of q-axis voltage commands on the basis of the estimated rotational position, and wherein the voltage sum calculator calculates, as the voltage sum, a d-axis voltage sum from the N sets of d-axis voltage commands and a q-axis voltage sum from the N sets of q-axis voltage commands, respectively; and the current sum calculator calculates, as the current sum, a d-axis current sum from the N sets of d-axis currents and a q-axis current sum from the N sets of q-axis currents, respectively. - View Dependent Claims (9)
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Specification