| 摘要 |
Provided is a sensorless vector control apparatus for an induction motor capable of enhancing sensorless vector control performance by estimating a change in a parameter of an induction motor in real time. The sensorless vector control apparatus for an induction motor comprises a current controller; a first phase converting unit; an inverter; a second phase converting unit; a rotor speed and position estimator configured to measure a rotor speed and a rotor magnetic flux of the induction motor using a motor phase current measured by using an output voltage of the inverter and an output value of the first phase converting unit, and to estimate a rotor position using the values; and a stator resistance and angle error estimator configured to calculate a stator resistance and an angle error of the induction motor by receiving d, q axis current commands on a synchronous reference frame inputted from the current controller and d, q voltages on the synchronous reference frame outputted from the current controller, and to provide the stator resistance to the rotor speed and position estimator. |
