PMSM Electrical Parameters

Measurement-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 ].