Rotor-Flux Vector Based Observer of Interior Permanent Synchronous Machine
The sensorless control system of the interior permanent magnet machine (IPMSM) is considered in this paper. The control system is based on classical linear controllers. In IPMSM, there occurs non-sinusoidal distribution of rotor flux together with the slot harmonics, these are treated as control system disturbances. In this case, the classical observer structure in the (d-q) is unstable for the low range of rotor speed resulting in disturbances. This negative effect can be minimized by using the observer structure which is based on the rotor flux vector in (α-β) stationary frame together with the classical rotor speed and position law of estimation. The performance of the observer structure is validated by simulation and experimental results in the sensorless control system with field-oriented control
There are two movies attached, which presenting the IPMSM work under the sensorless control system with the proposed observer structure:
1. Drive is turned on and off
2. Standstill of IPMSM
In the movie "1. Drive is turn on and off" the electric drive is turned on and off (in the sensorless control system without using the initial position estimation).
In the movie "2. Standstill of IPMSM" after a few seconds IPMSM comes to a standstill and starts up.