Control apparatus for rotating electric machine
First Claim
1. A control apparatus for a rotating electric machine that is electrically connected to an inverter, the control apparatus comprising:
- a phase calculating unit that calculates a voltage phase that is a phase of a voltage vector of a voltage applied to the rotating electric machine, as a manipulated variable for performing feedback control to control a torque of the rotating electric machine to a command torque;
an amplitude calculating unit that calculates a voltage amplitude that is a magnitude of the voltage vector, as a manipulated variable for performing feedback control to control a current flowing to the rotating electric machine to a command current corresponding to the command torque;
a control unit that controls the torque to the command torque by operating the inverter based on the voltage phase and the voltage amplitude;
a phase gain setting unit that sets a phase feedback gain used for feedback control of the phase calculating unit such that a first condition and a second condition are met, the first condition being that a gain margin and a phase margin in frequency characteristics of a first loop transfer function are ensured, the second condition being that a gain intersection angular frequency in frequency characteristics of the first loop transfer function is lower than respective resonance angular frequency in frequency characteristics of a first transfer function and a second transfer function,the first loop transfer function being a loop transfer function of which an input is the voltage phase and an output is the torque or a value obtained by a high frequency component being removed from the torque, the loop transfer function including a transfer function for feedback control of the phase calculating unit and a phase-side transfer function,the phase-side transfer function being a transfer function that expresses frequency characteristics of the rotating electric machine of which an input is the voltage phase and an output is the torque, the transfer function including the first transfer function and the second transfer function,the first transfer function being a transfer function that expresses frequency characteristics of the rotating electric machine of which an input is the voltage phase and an output is the torque,the second transfer function being a transfer function that expresses frequency characteristics of the rotating electric machine of which an input is the voltage amplitude and an output is the torque; and
an amplitude gain setting unit that sets an amplitude feedback gain used for feedback control of the amplitude calculating unit such that a third condition and a fourth condition are met, the third condition being that a gain margin and a phase margin in frequency characteristics of a second loop transfer function are ensured, the fourth condition being that a gain intersection angular frequency in frequency characteristics of a second loop transfer function is lower than respective resonance angular frequency in frequency characteristics of a third transfer function and a fourth transfer function,the second loop transfer function being a loop transfer function of which an input is the voltage amplitude and an output is the command current or a value obtained by a high frequency component being removed from the command current, the loop transfer function including a transfer function for feedback control of the amplitude calculating unit and an amplitude-side transfer function,the amplitude-side transfer function being a transfer function that expresses frequency characteristics of the rotating electric machine of which an input is the phase amplitude and an output is the command current, the transfer function including the third transfer function and the fourth transfer function,the third transfer function being a transfer function that expresses frequency characteristics of the rotating electric machine of which an input is the voltage phase and an output is the command current,the fourth transfer function being a transfer function that expresses frequency characteristics of the rotating electric machine of which an input is the voltage amplitude and an output is the command current.
1 Assignment
0 Petitions
Accused Products
Abstract
In a control apparatus for a rotating electric machine, a phase feedback gain is set such that first and second conditions are met. The first condition is that gain margin and phase margin in frequency characteristics of a first loop transfer function are ensured. The second condition is that a gain intersection angular frequency in frequency characteristics of the first loop transfer function is lower than respective resonance angular frequency in frequency characteristics of first and second transfer functions. An amplitude feedback gain is set such that third and fourth conditions are met. The third condition is that gain margin and phase margin in frequency characteristics of a second loop transfer function are ensured. The fourth condition is that a gain intersection angular frequency in frequency characteristics of a second loop transfer function is lower than respective resonance angular frequency in frequency characteristics of third and fourth transfer functions.
6 Citations
17 Claims
-
1. A control apparatus for a rotating electric machine that is electrically connected to an inverter, the control apparatus comprising:
-
a phase calculating unit that calculates a voltage phase that is a phase of a voltage vector of a voltage applied to the rotating electric machine, as a manipulated variable for performing feedback control to control a torque of the rotating electric machine to a command torque; an amplitude calculating unit that calculates a voltage amplitude that is a magnitude of the voltage vector, as a manipulated variable for performing feedback control to control a current flowing to the rotating electric machine to a command current corresponding to the command torque; a control unit that controls the torque to the command torque by operating the inverter based on the voltage phase and the voltage amplitude; a phase gain setting unit that sets a phase feedback gain used for feedback control of the phase calculating unit such that a first condition and a second condition are met, the first condition being that a gain margin and a phase margin in frequency characteristics of a first loop transfer function are ensured, the second condition being that a gain intersection angular frequency in frequency characteristics of the first loop transfer function is lower than respective resonance angular frequency in frequency characteristics of a first transfer function and a second transfer function, the first loop transfer function being a loop transfer function of which an input is the voltage phase and an output is the torque or a value obtained by a high frequency component being removed from the torque, the loop transfer function including a transfer function for feedback control of the phase calculating unit and a phase-side transfer function, the phase-side transfer function being a transfer function that expresses frequency characteristics of the rotating electric machine of which an input is the voltage phase and an output is the torque, the transfer function including the first transfer function and the second transfer function, the first transfer function being a transfer function that expresses frequency characteristics of the rotating electric machine of which an input is the voltage phase and an output is the torque, the second transfer function being a transfer function that expresses frequency characteristics of the rotating electric machine of which an input is the voltage amplitude and an output is the torque; and an amplitude gain setting unit that sets an amplitude feedback gain used for feedback control of the amplitude calculating unit such that a third condition and a fourth condition are met, the third condition being that a gain margin and a phase margin in frequency characteristics of a second loop transfer function are ensured, the fourth condition being that a gain intersection angular frequency in frequency characteristics of a second loop transfer function is lower than respective resonance angular frequency in frequency characteristics of a third transfer function and a fourth transfer function, the second loop transfer function being a loop transfer function of which an input is the voltage amplitude and an output is the command current or a value obtained by a high frequency component being removed from the command current, the loop transfer function including a transfer function for feedback control of the amplitude calculating unit and an amplitude-side transfer function, the amplitude-side transfer function being a transfer function that expresses frequency characteristics of the rotating electric machine of which an input is the phase amplitude and an output is the command current, the transfer function including the third transfer function and the fourth transfer function, the third transfer function being a transfer function that expresses frequency characteristics of the rotating electric machine of which an input is the voltage phase and an output is the command current, the fourth transfer function being a transfer function that expresses frequency characteristics of the rotating electric machine of which an input is the voltage amplitude and an output is the command current. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
-
-
17. A control method for a rotating electric machine that is electrically connected to an inverter, the control method comprising:
-
calculating, by a control apparatus provided in the rotating machine, a voltage phase that is a phase of a voltage vector of a voltage applied to the rotating electric machine, as a manipulated variable for performing feedback control to control a torque of the rotating electric machine to a command torque; calculating, by the control apparatus, a voltage amplitude that is a magnitude of the voltage vector, as a manipulated variable for performing feedback control to control a current flowing to the rotating electric machine to a command current corresponding to the command torque; controlling, by the control apparatus, the torque to the command torque by operating the inverter based on the voltage phase and the voltage amplitude; setting, by the control apparatus, a phase feedback gain such that a first condition and a second condition are met, the first condition being that a gain margin and a phase margin in frequency characteristics of a first loop transfer function are ensured, the second condition being that a gain intersection angular frequency in frequency characteristics of the first loop transfer function is lower than respective resonance angular frequency in frequency characteristics of a first transfer function and a second transfer function, the first loop transfer function being a loop transfer function of which an input is the voltage phase and an output is the torque or a value obtained by a high frequency component being removed from the torque, the loop transfer function including a transfer function for feedback control of the phase calculating unit and a phase-side transfer function, the phase-side transfer function being a transfer function that expresses frequency characteristics of the rotating electric machine of which an input is the voltage phase and an output is the torque, the transfer function including the first transfer function and the second transfer function, the first transfer function being a transfer function that expresses frequency characteristics of the rotating electric machine of which an input is the voltage phase and an output is the torque, the second transfer function being a transfer function that expresses frequency characteristics of the rotating electric machine of which an input is the voltage amplitude and an output is the torque; and setting, by the control apparatus, an amplitude feedback gain such that a third condition and a fourth condition are met, the third condition being that a gain margin and a phase margin in frequency characteristics of a second loop transfer function are ensured, the fourth condition being that a gain intersection angular frequency in frequency characteristics of a second loop transfer function is lower than respective resonance angular frequency in frequency characteristics of a third transfer function and a fourth transfer function, the second loop transfer function being a loop transfer function of which an input is the voltage amplitude and an output is the command current or a value obtained by a high frequency component being removed from the command current, the loop transfer function including a transfer function for feedback control of the amplitude calculating unit and an amplitude-side transfer function, the amplitude-side transfer function being a transfer function that expresses frequency characteristics of the rotating electric machine of which an input is the phase amplitude and an output is the command current, the transfer function including the third transfer function and the fourth transfer function, the third transfer function being a transfer function that expresses frequency characteristics of the rotating electric machine of which an input is the voltage phase and an output is the command current, the fourth transfer function being a transfer function that expresses frequency characteristics of the rotating electric machine of which an input is the voltage amplitude and an output is the command current.
-
Specification