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Description: The vector control, also known as the field-oriented control
(FOC), of a permanent magnet synchronous motor (PMSM) is
the algorithm often used in today’s advanced motor control
drives. Such advanced motor control algorithms require the
setting of motor electrical parameters for its proper
functionality. This application note deals with the
measurement of electrical parameters needed for vector
control of PMSM. The electrical parameters are needed to set
the current PI controller gains to get the desired closed-loop
performance and for BEMF observer constants. The proposed
measurement techniques determine a number of pole pairs, a
stator resistance, synchronous inductances, and an electrical
constant with common measurement equipment. A summary
of PMSM sensorless control and explanation of motor control
terms can be found in [1 ].
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