UM-YROTATE-IT-RX62T datasheet(31/54 Pages) RENESAS

31 / 54 page

RX62T

YROTATE-IT-RX62T Motor Control Kit

UM-YROTATE-IT-RX62T Rev.1.00

Page 31 of 51

Jan 15, 2014

Furthermore idmea and iqmea begin to be similar to the real flux and torque components of the current. The

real components are supposed to be id0 and iq0 (those values are obtained applying a low-pass filter to idmea

and iqmea).

The interval (t2-t1) is the start-up time, and it is supposed to be large enough to allow the estimation algorithm to

reach the complete alignment with the real phase of the system.

d) At t = t2, the phase estimation process is supposed to be aligned. At this point a reference system change is

performed: from the arbitrary (da, qa) reference to the (d, q) reference based on the estimated phase

est.

The current references are changed to the values id0 and iq0, and all the PI controllers are initialized with these new

values. The speed PI integral memory is initialized with the value iq0, while the current PI integral memories are

initialized with the analogous voltage values vd0 and vq0, obtained from vdmea and vqmea.

e) After t > t2 , the normal control is performed, based on the estimated phase

est; the speed reference is

increased with the classical ramp; the id current reference is decreased with a ramp, till it reaches the value

zero at the moment t3; then it is maintained to zero; the iq current reference is obtained as output of the

speed PI controller.

UM-YROTATE-IT-RX62T Datasheet(PDF) 31 Page - Renesas Technology Corp