JP2010022165A5

JP2010022165A5 -

Info

Publication number: JP2010022165A5
Application number: JP2008182166A
Authority: JP
Filing date: 2008-07-14
Publication date: 2010-11-11
Anticipated expiration: 2028-07-14

Claims

AC motor having a plurality of windings for each phase, winding switching means for switching the plurality of windings, and an inverter device for driving the AC motor,
The inverter device has at least an integrator, calculates a current command value to the AC motor using a deviation between the limit voltage command based on the maximum output voltage and the output voltage, and corrects the constant output controller,
A current command correction value calculator configured to set a correction value calculated in advance by the constant output controller before winding switching to the integrator at winding switching timing . Line switching device.

The inverter device further includes a dq coordinate system in which the current command value is based on a magnetic flux direction of the AC motor as a d-axis current command value and a q-axis current command value based on a torque command and a motor constant of the AC motor. A current command calculator to calculate,
The output voltage is calculated so that the d-axis current command value and the q-axis current command value coincide with a d-axis current detection value and a q-axis current detection value, which are dq coordinate conversion values of the motor current flowing through the AC motor. And a current controller to
2. The AC motor winding switching apparatus according to claim 1 , wherein the correction by the constant output controller is performed on the d-axis current command value .

3. The AC motor winding switching apparatus according to claim 1, wherein the constant output controller sets zero when the correction value to the integrator is a positive value . 4.

The inverter device further includes a voltage feedforward calculator that adds a voltage feedforward value corresponding to the speed of the AC motor to the output voltage,
3. The AC motor winding switching apparatus according to claim 1, wherein the voltage feedforward value is calculated using at least an output of the current command correction value calculator .

The value calculated by the current command correction value calculator and calculated in advance before switching the winding is a value corresponding to the q-axis current command value and the speed of the AC motor. AC motor winding switching device.

The value calculated by the current command correction value calculator, which is calculated in advance before switching the winding, uses a correction value calculation table that receives the PN voltage detection value that is the converter unit voltage of the inverter and the torque command. The coil switching device for an AC motor according to claim 2 , wherein the winding switching device is an AC motor.

The value calculated in advance by the d-axis current command correction value calculator before switching the winding is calculated as an approximate d-axis current correction value using a correction value calculation table using the torque command as an input. The winding switching device for an AC motor according to claim 2 , wherein the winding switching device is a value calculated by correcting the approximate d-axis current correction value using a detected PN voltage that is a converter section voltage of the inverter device. .

It is connected to an AC motor equipped with a plurality of windings that can be switched by winding switching means for each phase,
A constant output controller that has at least an integrator, calculates a current command value to the AC motor using a deviation between the limit voltage command based on the maximum output voltage and the output voltage, and corrects the current command value;
A current command correction value calculator for setting a correction value calculated in advance by the constant output controller before winding switching to the integrator at the timing of winding switching;
An inverter device for driving the AC motor .

A current command calculator for calculating the current command value as a d-axis current command value and a q-axis current command value based on a torque command and a motor constant of the AC motor in a dq coordinate system with reference to the magnetic flux direction of the AC motor; ,
The output voltage is calculated so that the d-axis current command value and the q-axis current command value coincide with a d-axis current detection value and a q-axis current detection value, which are dq coordinate conversion values of the motor current flowing through the AC motor. And a current controller that
9. The inverter device according to claim 8 , wherein the correction by the constant output controller is performed on the d-axis current command value .

10. The inverter device according to claim 8, wherein the constant output controller sets a zero value when a correction value to the integrator is a positive value . 11.

AC motor having a plurality of windings for each phase, winding switching means for switching the plurality of windings, and an inverter device for driving the AC motor,
The inverter device includes a winding switching command signal generator that outputs a winding switching command signal;
A constant switching unit that switches a plurality of motor constants of the built-in AC motor according to the output of the winding switching command signal;
A winding switching device for an AC motor, comprising: a current detection value correction calculator that corrects a detected value of a motor current flowing through the AC motor according to a change in the motor constant.

The inverter device further calculates a current command value to the AC motor as a d-axis and q-axis current command value based on a torque command and the motor constant in a dq coordinate system based on a magnetic flux direction of the AC motor. A current command calculator,
A current controller that calculates an output voltage to the AC motor so that the d-axis and q-axis current command values match a d-axis and q-axis current detection value that is a dq coordinate conversion value of the motor current; The winding switching device for an AC motor according to claim 11, comprising:

The current detection value correction calculator uses the motor constant before and after switching of the windings, a current command value to the AC motor, a function of the motor current detection value, or a table, or a detection value of the motor current. 13. The AC motor winding switching device according to claim 11 or 12, wherein a correction value is calculated.

The AC motor winding switching device according to claim 11 or 12, wherein the motor constant includes at least an armature inductance.

The inverter device further includes a PWM controller that PWM-controls the output voltage in synchronization with a carrier signal and outputs the PWM voltage to the AC motor,
13. The AC motor winding switching apparatus according to claim 11 or 12, wherein the current detection value correction computing unit corrects the motor current to a detection value in synchronization with the carrier signal. .

The current detection value correction arithmetic unit performs correction to the detection value of the motor current in accordance with a ratio of the motor constant before and after switching of the windings. AC motor winding switching device.

It is connected to an AC motor equipped with a plurality of windings that can be switched by winding switching means for each phase,
A winding switching command signal generator for outputting a winding switching command signal;
A constant switching unit that switches a plurality of motor constants of the built-in AC motor according to the output of the winding switching command signal;
A current detection value correction calculator that corrects the detected value of the motor current flowing through the AC motor in accordance with a change in the motor constant;
An inverter device for driving the AC motor.

A current command calculator that calculates a current command value to the AC motor as a d-axis and q-axis current command value based on a torque command and the motor constant in a dq coordinate system based on the magnetic flux direction of the AC motor;
A current controller that calculates an output voltage to the AC motor so that the d-axis and q-axis current command values match a d-axis and q-axis current detection value that is a dq coordinate conversion value of the motor current; The inverter device according to claim 17 .

The current detection value correction computing unit uses the motor constant before and after switching of the windings, a current command value to the AC motor, a function of the motor current detection value, or a table, or a detection value of the motor current. The inverter device according to claim 17 or 18, wherein a correction value is calculated .

19. The detected current value correction arithmetic unit performs correction to the detected value of the motor current according to a ratio of the motor constant before and after switching of the windings. AC motor winding switching device.