SOLO Communication Manual - UART and USB
www.solomotorcontrollers.com
September 2021 - Revision V_1.0.1 Copyright © 2021, All right Reversed. SOLO motor controllers.
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0x21 : Sensorless Observer Gain for Normal BLDC-PMSM Motors
Sensorless Observer Gain for Normal Brushless Motor
Description:
This command sets the observer gain for the Non-linear observer that estimates the speed and
angle of a BLDC or PMSM once the motor type is selected as normal BLDC-PMSM. This
Observer Gain basically deals with the Motor Back EMF Estimation, and normally it has a value
from 0.01 to 1.0 for regular operations. In General, the Motors with higher Electrical time
constant need less values for this observer gain, Electrical Time constant can be driven from
division of Inductance over Resistance of the Motor’s phases. This observer gain will be used
both in Analogue and Digital Mode for Sensor-less operations and the gain can be modified
dynamically in run-time.
0x22 : Sensorless Observer Gain for Ultra-fast BLDC-PMSM Motors
Sensorless Observer Gain for Ultra-fast BLDC-PMSM Motors
Description:
This command sets the observer gain for the Non-linear observer that estimates the speed and
angle of a BLDC or PMSM once the motor type is selected as ultra-fast BLDC-PMSM. This
Observer Gain basically deals with the Motor Back EMF Estimation, and normally it has a value
from 0.01 to 1.0 for regular operations. In General, the Motors with higher Electrical time
constant need less values for this observer gain, Electrical Time constant can be driven from
division of Inductance over Resistance of the Motor’s phases. This observer gain will be used
both in Analogue and Digital Mode for Sensor-less operations and the gain can be modified
dynamically in run-time.
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