DocumentCode :
1624012
Title :
Sensorless speed and position control of synchronous machines using alternating carrier injection
Author :
Linke, Marco ; Kennel, Ralph ; Holtz, Joachim
Author_Institution :
Wuppertal Univ., Germany
Volume :
2
fYear :
2003
Firstpage :
1211
Abstract :
High frequency carrier injection is a promising approach solving high performance sensorless drive demands. Position control at low and zero speed is only possible using anisotropic effects considered in high-frequency models. The usually open loop carrier signal injection is impacted by nonlinear inverter properties like the dead-time effect. This paper discusses the influence of the dead time effect on the carrier signal excitation comparing alternating and revolving injection principles. To overcome disturbing effects an alternating injection procedure is proposed using a predefined injection angle. The approach reduces the effects of the inverter distortion voltages. As a result it is possible to track even small saliencies typical for surface mounted permanent magnet synchronous machines. For processing the high frequency current for position estimation, there is no additional hardware necessary within a standard drives with field oriented control. The paper presents theoretical analysis and experimental results.
Keywords :
DC-AC power convertors; control system analysis; control system synthesis; invertors; machine testing; machine theory; machine vector control; parameter estimation; position control; synchronous motor drives; velocity control; alternating carrier injection; anisotropic effects; dead-time effect; high frequency current; high-frequency models; inverter distortion voltages; nonlinear inverter properties; open loop carrier signal injection; position estimation; predefined injection angle; sensorless motor drive; sensorless position control; sensorless speed control; synchronous machines; Anisotropic magnetoresistance; Frequency estimation; Hardware; Inverters; Magnetic analysis; Nonlinear distortion; Permanent magnet machines; Position control; Synchronous machines; Voltage;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Electric Machines and Drives Conference, 2003. IEMDC'03. IEEE International
Print_ISBN :
0-7803-7817-2
Type :
conf
DOI :
10.1109/IEMDC.2003.1210394
Filename :
1210394
Link To Document :
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