Method and apparatus for controlling hybrid excitation type permanent magnet synchronous motor

A method of controlling a hybrid excitation type synchronous motor, the hybrid excitation type synchronous motor having a field of a permanent magnet and a dc excitation coil, magnetic flux of the field being controlled by adjusting dc electric current of the dc excitation coil, said method comprising the steps of:

• dividing an electric current at an armature coil of the motor into a direct-axis component and a quadrature-axis component relative to the voltage induced in the armature coil;
• and
• adjusting the dc electric current of the dc excitation coil to vary the magnetic flux of the field and controlling electric current and voltage at the armature coil so that the quadrature-axis component of the armature voltage is zero.

A method of controlling a hybrid excitation type synchronous motor, the hybrid excitation type synchronous motor having a field of a permanent magnet and a dc excitation coil, magnetic flux of the field being controlled by adjusting dc electric current of the dc excitation coil, said method comprising the steps of:

• determining a current ratio of a direct-axis component and a quadrature-axis component, which components are obtained by dividing an electric current at an armature coil of the motor into the direct-axis component and the quadrature-axis component relative to the voltage induced in the armature coil, from a preset magnetic flux table and a current ratio table according to a torque command and a rotation speed of the motor;
• and
• adjusting the dc electric current of the dc excitation coil to vary the magnetic flux of the field and controlling current and voltage at the armature coil so as to keep said current ratio of the direct-axis component and the quadrature-axis component at the determined current ratio.

A method of controlling a motor having a field of a permanent magnet and a dc excitation coil, magnetic flux of the field being controlled by adjusting dc electric current of the dc excitation coil, said method comprising the steps of:

• determining a current ratio of a direct-axis component and a quadrature-axis component, which components are obtained by dividing an electric current at an armature coil of the motor into the direct-axis component and the quadrature-axis component relative to the voltage induced in the armature coil, from a preset current ratio table according to a torque command and a rotation speed of the motor;
• and
• adjusting the dc electric current of the dc excitation coil to vary the magnetic flux of the field and controlling current and voltage at the armature coil so as to keep said current ratio of the direct-axis component and the quadrature-axis component at the determined current ratio.

A method of controlling a hybrid excitation type synchronous motor, the hybrid excitation type synchronous motor including a field of a permanent magnet and a dc excitation coil, magnetic flux of the field being controlled by adjusting dc electric current of the dc excitation coil, said method comprising the steps of:

• determining a current ratio of a direct-axis component and a quadrature-axis component, which components are obtained by dividing an electric current at an armature coil of the motor into the direct-axis component and the quadrature-axis component relative to the voltage induced in the armature coil, from a preset magnetic flux table and a preset component current table of each component according to a torque command and a rotation speed of the motor;
• and
• adjusting the dc electric current of the dc excitation coil to vary the magnetic flux of the field and controlling current and voltage at the armature coil and the magnetic flux of the field so as to keep said current ratio of the direct-axis component and the quadrature-axis component at the determined current ratio.

A method of controlling a motor including a field of a permanent magnet and a dc excitation coil, magnetic flux of the field being controlled by adjusting dc electric current of the dc excitation coil, said method comprising the steps of:

• determining a current ratio of a direct-axis component and a quadrature-axis component, which components are obtained by dividing an electric current at an armature coil of the motor into the direct-axis component and the quadrature-axis component relative to the voltage induced in the armature coil, from a preset component current table according to a torque command and a rotation speed of the motor;
• and
• adjusting the dc electric current of the dc excitation coil to vary the magnetic flux of the field and controlling current and voltage at the armature coil so as to keep said current ratio of the direct-axis component and the quadrature-axis component at the determined current ratio.

A method of controlling a hybrid excitation type motor having a field of a permanent magnet and a dc excitation coil, magnetic flux of the field being controlled by adjusting dc electric current of the dc excitation coil, comprising the steps of:

• adjusting the dc electric current of the dc excitation coil to vary the magnetic flux of the field and controlling a current of a direct-axis component and a current of a quadrature-axis component, which components are obtained by dividing an electric current at an armature coil of the motor into the direct-axis component and the quadrature-axis component relative to the voltage induced in the armature coil;
• and
• implementing a feed-forward compensation of the current of each component by calculating an interference component relative to the current of each component from a current command value and a dc electric current command value.

A method of controlling a hybrid excitation type motor having a field of a permanent magnet and a dc excitation coil, magnetic flux of the field being controlled by adjusting dc electric current of the dc excitation coil, comprising the steps of:

• adjusting the dc electric current of the dc excitation coil to vary the magnetic flux of the field and controlling a current of a direct-axis component and a current of a quadrature-axis component, which components are obtained by dividing an electric current at an armature coil of the motor into the direct-axis component and the quadrature-axis component relative to the voltage induced in the armature coil;
• and
• implementing a feed-forward compensation of the current of each component by producing a voltage model from a voltage equation, a current command value and a dc electric current command value.

A control system for controlling a hybrid excitation type synchronous motor, the hybrid excitation type synchronous motor having a field of a permanent magnet and a dc excitation coil, magnetic flux of the field being controlled by adjusting dc electric current of the dc excitation coil, said control system comprising:

• dividing means for dividing an electric current to at armature coil of the motor into a direct-axis component and a quadrature-axis component relative to the voltage induced in the armature coil;
• and
• control means for adjusting the dc electric current of the dc excitation coil to vary the magnetic flux of the field and controlling electric current and voltage at the armature coil so that the quadrature-axis component of the armature voltage is zero.

A control system for controlling a hybrid excitation type synchronous motor, the hybrid excitation type synchronous motor having a field of a permanent magnet and a dc excitation coil, magnetic flux of the field being controlled by adjusting dc electric current of the dc excitation coil, said control system comprising:

• determining means for determining a current ratio of a direct-axis component and a quadrature-axis component, which components are obtained by dividing an electric current at an armature coil of the motor into the direct-axis component and the quadrature-axis component relative to the voltage induced in the armature coil, from a preset magnetic flux table and a current ratio table according to a torque command and a rotation speed of the motor;
• and
• control means for adjusting the dc electric current of the dc excitation coil to vary the magnetic flux of the field and controlling current and voltage at the armature coil and the magnetic flux of the field so as to keep said current ratio of the direct-axis component and the quadrature-axis component at the determined current ratio.

A control system for controlling a motor having a field of a permanent magnet and a dc excitation coil, magnetic flux of the field being controlled by adjusting dc electric current of the dc excitation coil, said control system comprising:

• determining means for determining a current ratio of a direct-axis component and a quadrature-axis component, which components are obtained by dividing an electric current at an armature coil of the motor into the direct-axis component and the quadrature-axis component relative to the voltage induced in the armature coil, from a preset current ratio table according to a torque command and a rotation speed of the motor;
• and
• control means for adjusting the dc electric current of the dc excitation coil to vary the magnetic flux of the field and controlling current and voltage at the armature coil so as to keep said current ratio of the direct-axis component and the quadrature-axis component at the determined current ratio.

A control system for controlling a hybrid excitation type synchronous motor, the hybrid excitation type synchronous motor including a field of a permanent magnet and a dc excitation coil, magnetic flux of the field being controlled by adjusting dc electric current of the dc excitation coil, said control system comprising:

• determining means for determining a current ratio of a direct-axis component and a quadrature-axis component, which components are obtained by dividing an electric current at an armature coil of the motor into the direct-axis component and the quadrature-axis component relative to the voltage induced in the armature coil, from a preset magnetic flux table and a preset component current table of each component according to a torque command and a rotation speed of the motor;
• and
• control means for adjusting the dc electric current of the dc excitation coil to vary the magnetic flux of the field and controlling current and voltage at the armature coil and the magnetic flux of the field so as to keep said current ratio of the direct-axis component and the quadrature-axis component at the determined current ratio.

A control system for controlling a motor including a field of a permanent magnet and a dc excitation coil, magnetic flux of the field being controlled by adjusting dc electric current of the dc excitation coil, said control system comprising:

• determining means for determining a current ratio of a direct-axis component and a quadrature-axis component, which components are obtained by dividing an electric current at an armature coil of the motor into the direct-axis component and the quadrature-axis component relative to the voltage induced in the armature coil, from a preset component current table according to a torque command and a rotation speed of the motor;
• and
• control means for adjusting the dc electric current of the dc excitation coil to vary the magnetic flux of the field and controlling current and voltage at the armature coil so as to keep said current ratio of the direct-axis component and the quadrature-axis component at the determined current ratio.

A control system for controlling a hybrid excitation type motor having a field of a permanent magnet and a dc excitation coil, magnetic flux of the field being controlled by adjusting dc electric current of the dc excitation coil, comprising:

• means for adjusting the dc electric current of the dc excitation coil to vary the magnetic flux of the field and controlling a current of a direct-axis component and a current of a quadrature-axis component, which components are obtained by dividing an electric current at an armature coil of the motor into the direct-axis component and the quadrature-axis component relative to the voltage induced in the armature coil;
• and
• means for implementing a feed-forward compensation of the current of each component by calculating an interference component relative to the current of each component from a current command value and a dc electric current command value.

A control system for controlling a hybrid excitation type motor having a field of a permanent magnet and a dc excitation coil, magnetic flux of the field being controlled by adjusting dc electric current of the dc excitation coil, comprising:

• means for adjusting the dc electric current of the dc excitation coil to vary the magnetic flux of the field and controlling a current of a direct-axis component and a current of a quadrature-axis component, which components are obtained by dividing an electric current at an armature coil of the motor into the direct-axis component and the quadrature-axis component relative to the voltage induced in the armature coil;
• and
• means for implementing a feed-forward compensation of the current of each component by producing a voltage model from a voltage equation, a current command value and a dc electric current command value.