Abstract
This paper proposes the algorithm for the initial pole-position estimation of a surface permanent magnet linear synchronous motor (surface PM-LSM), which is carried out under the closed loop control without a pole sensor and is insensitive to the motor parameters. This algorithm is based on the principle that the initial pole-position (IPP) is calculated by the reverse trigonometric-function using the two reference currents, which are informed from the speed controller. The effectiveness of the proposed alogoritm is confirmed by testing a surface PM-LSM with large disturbance. IPP is well estimated within a satisfied moving-distance and a shorter estimation taken-time even if large disturbance such as cogging and friction are existed.
