Method for open-loop and closed-loop control of an electromagnetic machine

摘要

Electromagnetic state variables of an electromagnetic machine are represented by space vectors. A setpoint value for the vector of a manipulated voltage at the stator is preset and an actual value of the vector of the current at the stator is measured. A vector of an induced voltage is determined from the setpoint value and the actual value of the vector of the current. A value of a vector of the magnetic flux is estimated from a preset correction voltage and the induced voltage. A phase angle and a rotating field frequency are estimated from the vector of the magnetic flux. A factor is multiplied into the vector of the correction voltage when a torque-forming component of a current at the stator has an opposite mathematical sign to the estimated value of the rotating field frequency.

主权项

1. A method for controlling an electromagnetic machine having a rotor and a stator, the method comprising:
determining electromagnetic state variables of the machine by way of a mathematical model with a space vector representation; presetting a setpoint value for a vector of a manipulated voltage at the stator; measuring an actual value of a vector of a current at the stator; determining a vector of an induced voltage from the setpoint value for the vector of the manipulated voltage and the actual value of the vector of the current at the stator; presetting a vector of a correction voltage; determining an estimated value of a vector of a magnetic flux from the vectors of the correction voltage and the induced voltage; and determining an estimated value of a phase angle and an estimated value of a rotating field frequency from the estimated value of the vector of the magnetic flux; determining a torque-forming component of the current at the stator from the measured actual value of the vector of the current and the estimated value of the phase angle; and if the torque-forming component of the current at the stator has an opposite mathematical sign to the estimated value of the rotating field frequency, multiplying the vector of the correction voltage by a factor.