| Abstract |
A novel position-sensorless drive with torque linear control for the interior permanent magnet
synchronous motor (IPMSM) is presented in this paper. The system has full speed-range drive
capabilities from zero to and over the base speed, which is a key requirement from the market. To
save energy and to reduce the capacity of IPMSM drive system, some methods have been reported.
However, it is difficult to realize these algorithms while controlling the torque, because of the
nonlinearity between torque and current due to the IPMSM’s saliency. To cope with this problem, we
propose a torque control method based on regulation of the load angle. The proposed control strategy
has been experimentally tested by using three types of IPMSM, each having a different base speed.
Stable sensorless operation over the whole speed range has been obtained, regardless of types of the
motor. The system can drive IPMSM until to 7200[r/min], which is very high speed. Therefore, the
system can be applied for wide uses. |
