Sensorless Pm - P0202 = 7 - WEG CFW-11 Programming Manual

PM Vector Control

21.2.1 Sensorless PM - P0202 = 7

The Sensorless PM control uses two rotor position estimation methods, the method for low speed injects a signal
with a frequency of ±1 kHz, which causes an increase in the acoustic noise, and the method for higher speeds
is based on the output voltages and currents. It allows the control of torque and speed down to 0 (zero) rpm;
with operation in a speed range of 1:1000 and fast dynamic response.
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21-2
Figure 21.1 - Sensorless PM vector control block diagram (P0202 = 7)