A novel position estimation technique for interior permanent magnet synchronous motor control
- Resource Type
- Conference
- Authors
- Pesse, G.; Paga, T.; Gimenez, M.I.; Guzman, V.
- Source
- Proceedings of the 1998 Second IEEE International Caracas Conference on Devices, Circuits and Systems. ICCDCS 98. On the 70th Anniversary of the MOSFET and 50th of the BJT. (Cat. No.98TH8350) Devices, circuits and systems Devices, Circuits and Systems, 1998. Proceedings of the 1998 Second IEEE International Caracas Conference on. :358-360 1998
- Subject
- Components, Circuits, Devices and Systems
Permanent magnets
Rotors
Permanent magnet motors
Impedance
Magnetic sensors
Synchronous motors
Testing
Machine vector control
Costs
Frequency
- Language
A new sensorless position estimation technique for interior permanent magnet synchronous motor (IPM) is presented. Permanent magnet synchronous motors generally require a rotor position sensor to achieve the vector control; however, this sensor increases product cost and maintenance. From these backgrounds, position sensorless schemes have received wide interest for industrial applications. The phase impedance of IPM motors varies appreciably as function of rotor position. This fact is used for the estimation of the rotor position. The scheme is based on injection of a high frequency current explorer signal by means of a current delta modulation controlled inverter. A signal processing technique is used to estimate the phase impedance. A previous knowledge of impedance angular position relation permits the estimation of rotor position. The technique was tested by simulation of a 5 HP 460 V IPM motor. The test results have been found satisfactory in both steady and transient states.