Rotating-electric-machine control apparatus

1. A rotating-electric-machine control apparatus comprising:

a voltage applying device that converts a DC voltage outputted. from a DC power source into an AC voltage and then applies the AC voltage converted to a rotating electric machine;

a rotation speed detector that detects a rotation speed of the rotating electric machine and then output the rotation speed detected, as a detection rotation speed;

a current detector that detects a current flowing in the rotating electric machine and then outputs the current detected, as a detection current;

a torque controller that generates a second torque command, based on a first torque command provided from the outside and the detection rotation speed, and then outputs the second torque command generated; and

a current controller that generates a voltage command, based on the second torque command and the detection current, and then outputs the voltage command generated,

wherein based on the voltage command outputted from the current controller, the voltage applying device is controlled,

wherein the voltage applying device converts the DC voltage into the AC voltage by use of any one of two or more different control methods, and switches the control method utilized in the conversion from one of the two or more control methods to another control method, based on a rotation speed of the rotating electric machine,

wherein the torque controller includes

two or more torque compensation amount maps that each store a torque compensation amount corresponding to the detection rotation speed and the first torque command; and

a torque compensation amount map selector that selects a single torque compensation amount map from the two or more torque compensation amount maps, based on at least one of the detection rotation speed and control information indicating the control method, utilized by the voltage applying device in the conversion, and

wherein the torque compensation amount stored in the torque compensation amount map selected by the torque compensation amount map selector is added to the first torque command and is outputted as the second torque command.

2. The rotating-electric-machine control apparatus according to claim 1 ,

wherein each of the two or more torque compensation amount maps outputs a compensated torque command generated by adding the torque compensation amount stored therein to the first torque command, and

wherein the torque compensation amount map selector outputs, as the second torque command, the compensated torque command outputted by the torque compensation amount map selected based on control information indicating the control method that is utilize in the conversion by the voltage applying device.

3. The rotating-electric-machine control apparatus according to claim 1 ,

wherein the voltage applying device is controlled through PWM control, and

wherein the two or more different control methods are two or more different, control methods in the PWM control.

4. The rotating-electric-machine control apparatus according to claim 1 , wherein the two or more different control methods in the PWM control include at least any two control methods out of a first control method for controlling a carrier frequency of a carrier wave to be utilized in the PWM control, a second control method for controlling the ratio of the carrier frequency to the detection rotation speed, a third control method based on a three-phase modulation method in which the respective modulation of the three phase output voltages of the voltage applying device are the same, and a fourth control method based on a two-phase modulation method in which two of the three-phase output voltages are modulated.

5. The rotating-electric-machine control apparatus according to claim 1 ,

wherein the number of the torque compensation amount maps is the same as at least the number of the two or more control methods, wherein the two or more torque compensation amount maps are provided in such a way as to correspond to the respective two or more control methods, and

wherein based on control information indicating the control method that is utilized in the conversion by the voltage applying device, the torque compensation amount map selector selects a single torque compensation amount map from the two or more torque compensation amount maps.

6. The rotating-electric-machine control apparatus according to claim

wherein a rotation speed range of the rotating electric machine that operates through the single control method of the two or more control methods is preliminarily determined, and

wherein one of the two or more torque compensation amount maps has a torque compensation amount corresponding to the single control method that corresponds to the rotation speed range.

7. The rotating-electric-machine control apparatus according to claim 6 ,

wherein the two or more torque compensation amount maps have at least a first torque compensation amount map and a second torque compensation amount map,

wherein the first torque compensation amount map has torque compensation amounts corresponding to two or more predetermined control methods that correspond to the respective two or more predetermined rotation speed ranges, and

wherein the second torque compensation amount map has torque compensation amounts corresponding to two or more predetermined control methods that correspond to other two or more predetermined rotation speed ranges different from the two or more predetermined rotation speed ranges and that are different from the two or more predetermined control methods.

8. The rotating-electric-machine control apparatus according to claim 1 ,

wherein in the case where while the rotation speed of the rotating electric machine rises and a predetermined detection rotation speed is reached, the voltage applying device switches the control method to be utilized in the conversion from one of the control methods out of the two or more control methods to another control method; in the case where while the rotation speed of the rotating electric machine falls, another predetermined detection rotation speed that is different from, said predetermined detection rotation speed is reached, the voltage applying device switches the control method from said another control method to said one control method,

wherein the predetermined detection rotation speed at a time when the rotation speed rises is set to be higher than said another predetermined rotation speed at a time when the rotation speed falls, and

wherein when the rotation speed rises and has not reached the predetermined detection rotation speed, the torque controller selects one torque compensation amount map including a torque compensation amount corresponding to said one control method; when the rotation speed is the same as or higher than the predetermined detection rotation speed, the torque controller selects another torque compensation amount map including a torque compensation amount corresponding to said another control method; when the rotation speed falls and has not reached said another predetermined detection rotation speed, the torque controller selects said another torque compensation amount map including a torque compensation amount corresponding to said another control method; when the rotation speed is the same as or lower than said another predetermined detection rotation speed, the torque controller selects said one torque compensation amount map including a torque compensation amount corresponding to said one control method.

9. The rotating-electric-machine control apparatus according to claim 8 , wherein the upper limit of a torque compensation amount setting region including the torque compensation amount is set in accordance with said predetermined detection rotation speed at a time when the rotation speed rises; the lower limit of the torque compensation amount setting region including the torque compensation amount is set in accordance with said another predetermined detection rotation speed at a time when the rotation speed falls.

10. The rotating-electric-machine control apparatus according to claim 8 , wherein the upper limit of a torque compensation amount setting region including the torque compensation amount is set in accordance with a detection rotation speed higher than said predetermined detection rotation speed at a time when the rotation speed rises; the lower limit of the torque compensation amount setting region including the torque compensation amount is set in accordance with a detection rotation speed lower than said another predetermined detection rotation speed at a time when the rotation speed falls.

11. A rotating-electric-machine control apparatus comprising:

a voltage applying device that converts a DC voltage outputted from a DC power source into an AC voltage and then applies the AC voltage converted to a rotating electric machine;

a rotation speed detector that detects a rotation speed of the rotating electric machine and then output the rotation speed detected, as a detection rotation speed;

a current detector that detects a current flowing in the rotating electric machine and then outputs the current detected, as a detection current;

a torque controller that generates a second torque command, based on a first torque command provided from the outside and the detection rotation speed, and then outputs the second torque command generated; and

a current, controller that generates a voltage command, based on the second torque command and the detection current, and then outputs the voltage command generated,

wherein based on the voltage command outputted from the current controller, the voltage applying device is controlled,

wherein there is provided a voltage detector that detects a DC voltage outputted from the DC power source and then outputs a detection DC voltage,

wherein the voltage applying device converts the DC voltage into the AC voltage by use of any one of two or more different control methods, and switches the control method utilized in the conversion from one of the two or more control methods to another control method, based on a rotation speed of the rotating electric machine,

wherein the torque controller includes

two or more torque compensation amount map groups including two or more respective torque compensation amount maps that each store a torque compensation amount corresponding to the detection rotation speed, the first torque command, and detection DC voltage; and

a torque compensation amount map selector that selects a single torque compensation amount map group from the two or more torque compensation amount map groups, based on at least one of the detection rotation speed and control information indicating the control method, utilized in the conversion by the voltage applying device, and that selects, based on the detection DC voltage, a single torque compensation amount map from two or more torque compensation amount maps included in the selected torque compensation amount map group,

wherein the two or more torque compensation amount maps included in the torque compensation amount map group are two or more torque compensation amount maps that are provided in such a way as to correspond to respective different values of the detection DC voltage and store respective different torque compensation amounts, and wherein the torque compensation amount stored in the torque compensation amount map selected by the torque compensation amount map selector is added to the first torque command and is outputted as the second torque command.

12. The rotating-electric-machine control apparatus according to claim 11 ,

wherein each of the two or more torque compensation amount maps outputs a compensated torque command generated by adding the torque compensation amount stored therein to the first torque command, and

wherein the torque compensation amount map selector outputs, as the second torque command, the compensated torque command outputted by the torque compensation amount map selected based on the detection DC voltage.

13. The rotating-electric-machine control apparatus according to claim 11 ,

wherein the voltage applying device is controlled through PWM control, and

wherein the two or more different control methods are two or more different control methods in the PWM control.

14. The rotating-electric-machine control apparatus according to claim 11 , wherein the two or more different control methods in the PWM control include at least any two control methods out of a first control method for controlling a carrier frequency of a carrier wave to be utilized in the PWM control, a second control method for controlling the ratio of the carrier frequency to the detection rotation speed, a third control method based on a three-phase modulation method in which the respective modulation of the three-phase output voltages of the voltage applying device are the same, and a fourth control method based on a two-phase modulation. method in which two of the three-phase output voltages are modulated.

15. The rotating-electric-machine control apparatus according to claim 11 ,

wherein the number of the two or more torque compensation amount map groups is the same as at least the number of the two or more control methods,

wherein the two or more torque compensation amount map groups are provided in such a way as to correspond to the respective two or more control methods, and

wherein based on control information indicating the control method that is utilized in the conversion by the voltage applying device, the torque compensation amount map selector selects a single torque compensation amount map group from the two or more torque compensation amount map groups.

16. The rotating-electric-machine control apparatus according to claim 11 ,

wherein a rotation speed range of the rotating electric machine that operates through the single control method of the two or more control methods is preliminarily determined, and

wherein one of the respective two or more torque compensation amount maps included in the two or more torque compensation amount map groups has a torque compensation amount corresponding to the single control method that corresponds to the rotation speed range.

17. The rotating-electric-machine control apparatus according to claim 16 ,

wherein each of the respective two or more torque compensation amount maps included in the two or more torque compensation amount map groups has at least a first torque compensation amount map and a second torque compensation amount map,

wherein the first torque compensation amount map has torque compensation amounts corresponding to two or more predetermined control methods that correspond to the respective two or more predetermined rotation speed ranges, and

wherein the second torque compensation amount map has torque compensation amounts corresponding to two or more predetermined control methods that correspond to other two or more predetermined rotation speed ranges different from the two or more predetermined rotation speed ranges and that are different from the two or more predetermined control methods.

18. The rotating-electric-machine control apparatus according to claim 11

rotating electric machine rises and a predetermined detection rotation speed is reached, the voltage applying device switches the control method to be utilized in the conversion from one of the control methods out of the two or more control methods to another control method; in the case where while the rotation speed of the rotating electric machine falls, another predetermined detection rotation speed that is different from said predetermined detection rotation speed is reached, the voltage applying device switches the control method from said another control method to said one control method,

wherein the predetermined detection rotation speed at a time when the rotation speed rises is set to be higher than said another predetermined rotation speed at a time when the rotation speed falls, and

wherein when the rotation speed rises and has not reached the predetermined detection rotation speed, the torque controller selects one torque compensation amount map group including a torque compensation amount corresponding to said one control method; when the rotation speed is the same as or higher than the predetermined detection rotation speed, the torque controller selects another torque compensation amount map group including a torque compensation amount corresponding to said another control method; when the rotation speed falls and has not reached said another predetermined detection rotation speed, the torque controller selects said another torque compensation amount map group including a torque compensation amount corresponding to said another control method; when the rotation speed is the same as or lower than said another predetermined detection rotation speed, the torque controller selects said one torque compensation amount map group including a torque compensation amount corresponding to said one control method.

19. The rotating-electric-machine control apparatus according to claim 18 , wherein the upper limit of a torque compensation amount setting region including the torque compensation amount is set in accordance with said predetermined detection rotation speed at a time when the rotation speed rises; the lower limit of the torque compensation amount setting region including the torque compensation amount is set in accordance with said another predetermined detection rotation speed at a time when the rotation speed falls.

20. The rotating-electric-machine control apparatus according to claim 18 , wherein the upper limit of a torque compensation amount setting region including the torque compensation amount is set in accordance with a detection rotation speed higher than said predetermined detection rotation speed at a time when the rotation speed rises; the lower limit of the torque compensation amount setting region including the torque compensation amount is set in accordance with a detection rotation speed lower than said another predetermined detection rotation speed at a time when the rotation speed falls.