Electrical power converter and control method
First Claim
1. An electrical power converter comprising:
- a first direct current line connected to a first direct current source;
a second direct current line connected to a second direct current source;
an alternating current line connected to an alternating current motor;
a motor torque controller that generates current command values for the alternating current motor and generates compensating voltage commands values that correspond to charge target values from a source power command value that commands the charge amount from the first direct current source to the second direct current source, a motor torque command value and a motor rotation speed;
a motor current controller that determines motor voltage commands values according to the current command values;
a distributed voltage command value generator that determines command values of voltage that the first direct current source and the second direct current source from a power distributed target value that corresponds respectively to the first direct current source and the second direct current source and the motor voltage command values output to the alternating current motor;
a voltage command value compensator that determines compensating distributed voltage command values by calculating the compensating voltage command values from the distributed voltage command values; and
a pulse generator that generates an output voltage at the alternating current output according to the compensating distributed command values.
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Accused Products
Abstract
An electrical power converter comprises a first direct current line connected to a first direct current source, a second direct current line connected to a second direct current source, an alternating current line connected to an alternating current motor, a controller, and a pulse generator. The controller determines a required torque of the alternating current motor. The controller also determines a voltage command value that substantially minimizes a copper loss of the alternating current motor while providing the required torque of the alternating current motor. The pulse generator generates an output voltage according to the voltage command value at the alternating current output.
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Citations
17 Claims
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1. An electrical power converter comprising:
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a first direct current line connected to a first direct current source;
a second direct current line connected to a second direct current source;
an alternating current line connected to an alternating current motor;
a motor torque controller that generates current command values for the alternating current motor and generates compensating voltage commands values that correspond to charge target values from a source power command value that commands the charge amount from the first direct current source to the second direct current source, a motor torque command value and a motor rotation speed;
a motor current controller that determines motor voltage commands values according to the current command values;
a distributed voltage command value generator that determines command values of voltage that the first direct current source and the second direct current source from a power distributed target value that corresponds respectively to the first direct current source and the second direct current source and the motor voltage command values output to the alternating current motor;
a voltage command value compensator that determines compensating distributed voltage command values by calculating the compensating voltage command values from the distributed voltage command values; and
a pulse generator that generates an output voltage at the alternating current output according to the compensating distributed command values. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. An electrical power converter comprising:
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a first direct current line connected to a first direct current source;
a second direct current line connected to a second direct current source;
an alternating current line that drives an alternating current motor;
a motor torque control means that generates current command values for the alternating current motor and generates compensating voltage commands values that correspond to charge target values from a source power command value that commands the charge amount from the first direct current source to the second direct current source, a motor torque command value and a motor rotation speed;
a motor current control means that determines motor voltage commands values according to the current command values;
a distributed voltage command value calculate means that generates command values of voltage that the first direct current source and the second direct current source from a power distributed target value that corresponds respectively to the first direct current source and the second direct current source and the motor voltage command values output to the alternating current motor;
a voltage command value compensate means that determines compensating distributed voltage command values by calculating the compensating voltage command values from the distributed voltage command values; and
a pulse generate means that generates an output voltage at the alternating current output according to the compensating distributed command values.
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13. A method of controlling an electrical power converter comprising:
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generating current command values for an alternating current motor;
generating compensating voltage commands values that correspond to charge target values from a source power command value that commands the charge amount from one direct current source to other direct current sources, a motor torque command value and a motor rotation speed;
determining motor voltage commands values according to the current command values;
generating command values of voltage that a first direct current source and a second direct current source from a power distributed target value that corresponds respectively to the first direct current source and the second direct current source and the motor voltage command values output to the alternating current motor;
determining compensating distributed voltage command values by calculating compensating voltage command values from the distributed voltage command values; and
generating an output voltage to power the alternating current motor according to the compensating distributed command values. - View Dependent Claims (14)
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15. An electrical power converter comprising:
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a first direct current line connected to a first direct current source;
a second direct current line connected to a second direct current source;
an alternating current line connected to an alternating current motor;
a controller, wherein the controller determines a required torque of the alternating current motor, wherein the controller determines a voltage command value that substantially minimizes a power loss of the alternating current motor while providing the required torque of the alternating current motor; and
a pulse generator that generates an output voltage according to the voltage command value at the alternating current output. - View Dependent Claims (16, 17)
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Specification