Sensorless Vector Control of Permanent Magnet Synchronous Machine Using High-Frequency Rotating Injection

The Authors in this paper present the sensorless vector control of an interior permanent magnet synchronous machine using high-frequency rotating injection. In this type of sensorless approach a high-frequency, symmetric voltage system is injected into the machine in the stationary reference frame. The mathematical model of the injection will be detailed along with the heterodyne filter-based signal processing method, which is used for the common coordinate system's angle estimation. Parameter sensitivity analysis will be carried out and its results will be used in an additional compensation algorithm to obtain more precise estimation over the whole range of operation. Simulation results will be presented using an off-the-shelf permanent magnet machine's parameters.