Start-Up Method - Renesas RA6T2 Application Note

Sensorless vector control for permanent magnetic
synchronous motor - 1shunt current detection

3.1.5 Start-up method

Figure 3-2 shows startup control of sensorless vector control software. Each mode is controlled by flags
managing each reference of the d-axis current, q-axis current, and speed.
I reference status
d
I reference status
q
Speed reference status
I reference [A]
d
I reference during
d
open-loop control
I reference [A]
q
Speed reference [rad/s]
Target speed reference
Reference speed threshold
for sensorless switch control
Figure 3-2 Startup Control of Sensorless Vector Control Software
R01AN6840EJ0100 Rev.1.00
May 23, 2023
MOTOR_SPEED_ID_CONST
MOTOR_SPEED_ID
_UP (0)
MOTOR_SPEED_IQ_ZERO_CONST
(0)
MOTOR_SPEED_SPE
ED_ZERO_CONST (0)
0
0
0
For Renesas Flexible Motor Control Series
MOTOR_SPEED
(1) _ID_DOWN (2)
MOTOR_SPEED_IQ_
AUTO_ADJ (2)
MOTOR_SPEED_SPEED_CHANGE
(2)
Sensorless Switching Transition
MOTOR_SPEED_ID
_ZERO_CONST (3)
MOTOR_SPEED_IQ_SPEED
_PI_OUTPUT (1)
I =0 control
d
t [s]
speed PI output
t [s]
t [s]
Page 36 of 73