A control device includes an estimation module configured to repeatedly calculate an angle estimation value correlated with a magnetic pole position of a rotating electric machine, and a storage module configured to store the angle estimation value. The estimation module includes a response information calculation module configured to calculate response information indicating a current change resulting from a change in an output voltage to the rotating electric machine or a voltage change resulting from a change in an output current to the rotating electric machine, a coefficient calculation module configured to calculate an interference coefficient correlated with electromagnetic mutual interference between coordinate axes of an orthogonal coordinate system of the rotating electric machine based on a past angle estimation value stored in the storage module, and an angle calculation module configured to calculate an angle estimation value based on the response information and the interference coefficient.

A control device includes an estimation module configured to repeatedly calculate an angle estimation value correlated with a magnetic pole position of a rotating electric machine, and a storage module configured to store the angle estimation value. The estimation module includes a response information calculation module configured to calculate response information indicating a current change resulting from a change in an output voltage to the rotating electric machine or a voltage change resulting from a change in an output current to the rotating electric machine, a coefficient calculation module configured to calculate an interference coefficient correlated with electromagnetic mutual interference between coordinate axes of an orthogonal coordinate system of the rotating electric machine based on a past angle estimation value stored in the storage module, and an angle calculation module configured to calculate an angle estimation value based on the response information and the interference coefficient.

The electric brake device includes a control device for performing follow-up control such that a braking force estimated value estimated by a braking force estimator follows a given braking force command value. The control device includes an angle-sensorless control function section for determining a phase of phase current of an electric motor irrespective of an actual angle of the electric motor and controlling the electric motor to have a current value that is based on the determined phase of the phase current. The angle-sensorless control function section includes a current phase determination section for determining a current phase that is the phase of the phase current of the electric motor on the basis of a deviation between the braking force command value and the braking force estimated value.

The electric brake device includes a control device for performing follow-up control such that a braking force estimated value estimated by a braking force estimator follows a given braking force command value. The control device includes an angle-sensorless control function section for determining a phase of phase current of an electric motor irrespective of an actual angle of the electric motor and controlling the electric motor to have a current value that is based on the determined phase of the phase current. The angle-sensorless control function section includes a current phase determination section for determining a current phase that is the phase of the phase current of the electric motor on the basis of a deviation between the braking force command value and the braking force estimated value.

A device according to an embodiment including a command generator that generates a current command value; a detector that detects a current value to be outputted from an inverter to an motor; a generator that generates a gate command to the inverter, and obtains an output voltage target vector of the inverter based on the gate command; an estimator that obtains a rotary phase angle estimated value of the motor based on the detected current value and the output voltage target vector; and a polarity determination part that, with supply of a current in synchronism with a rotor frequency of the motor, performs determination of a magnet magnetic pole using a generated magnetic flux or voltage in synchronism with the generated rotor frequency or both of them, and outputs a correction value for the rotary phase angle estimated value based on a result of the determination.

A device according to an embodiment including a command generator that generates a current command value; a detector that detects a current value to be outputted from an inverter to an motor; a generator that generates a gate command to the inverter, and obtains an output voltage target vector of the inverter based on the gate command; an estimator that obtains a rotary phase angle estimated value of the motor based on the detected current value and the output voltage target vector; and a polarity determination part that, with supply of a current in synchronism with a rotor frequency of the motor, performs determination of a magnet magnetic pole using a generated magnetic flux or voltage in synchronism with the generated rotor frequency or both of them, and outputs a correction value for the rotary phase angle estimated value based on a result of the determination.

A control device for a power conversion device according to an embodiment includes a drive control unit controlling a current that is caused to flow through a stator winding of a motor, a drive quantity adjustment unit calculating a drive quantity command value defining a drive quantity of the motor, a magnetic flux observer calculating calculates a first estimated value of a stator magnetic flux of the motor and a first estimated value of a rotor magnetic flux of the motor, a current observer calculating a first estimated value of the current flowing through the stator winding of the motor, and an average correction unit performing calculation on the first estimated values of the stator magnetic flux of the motor. The drive quantity adjustment unit calculates a control quantity defining the drive quantity of the motor on the basis of the first estimated values of the stator magnetic flux of the motor.

A control device for a power conversion device according to an embodiment includes a drive control unit controlling a current that is caused to flow through a stator winding of a motor, a drive quantity adjustment unit calculating a drive quantity command value defining a drive quantity of the motor, a magnetic flux observer calculating calculates a first estimated value of a stator magnetic flux of the motor and a first estimated value of a rotor magnetic flux of the motor, a current observer calculating a first estimated value of the current flowing through the stator winding of the motor, and an average correction unit performing calculation on the first estimated values of the stator magnetic flux of the motor. The drive quantity adjustment unit calculates a control quantity defining the drive quantity of the motor on the basis of the first estimated values of the stator magnetic flux of the motor.

A control device for a power conversion device according to an embodiment includes a drive control unit outputting a control signal based on a drive quantity command value, a drive quantity adjustment unit calculating the drive quantity command value based on a torque command for the motor, an estimated value of a stator magnetic flux of the motor, and a reference value of the stator magnetic flux of the motor, a magnetic flux observer calculating the estimated value of the stator magnetic flux of the motor, and a current observer smoothing the estimated value of the stator magnetic flux on the basis of time history data of the calculated estimated value of the stator magnetic flux, and calculating an estimated value of a current flowing through a stator winding of the motor.

A control device for a power conversion device according to an embodiment includes a drive control unit outputting a control signal based on a drive quantity command value, a drive quantity adjustment unit calculating the drive quantity command value based on a torque command for the motor, an estimated value of a stator magnetic flux of the motor, and a reference value of the stator magnetic flux of the motor, a magnetic flux observer calculating the estimated value of the stator magnetic flux of the motor, and a current observer smoothing the estimated value of the stator magnetic flux on the basis of time history data of the calculated estimated value of the stator magnetic flux, and calculating an estimated value of a current flowing through a stator winding of the motor.