6.8.1 Sensorless control synchronous motor
NOTE
Sensorless control with an expanded Kalman filter requires the
following firmware versions:
o
MSD Servo Drive: V3.25-95 or higher
o
MSD Single-Axis Servo Drive Compact: V1.30-98
Value
Value replacement text
Description
0
READY
Waits for input
1
TAKEOVER_ENC CH1
Switches to encoder channel 1 in
real-time
2
TAKEOVER_ENC CH4
Switches to encoder channel 4 in
real-time
3
PRESET
General initialization for encoder
channel 4 with sensorless control;
the following are carried out
during this initialization routine:
The test signal generator
is configured
The Q matrix, R matrix are
calculated
Initializing the Kalman
filter
Table 6.28: ENC_CH4_Ctrl (P783) control word
MOOG
ID
No.:
CB40859-001
Date:
02/2018
MSD Servo Drive - Device Help
89
6 Encoder
Value
Value replacement text
Description
4
START_ KAL
Starts and initializes the Kalman
filter without determining the
noise covariance matrices and
without configuring the test signal
generator
5
STOP _KAL
Stop encoder module CH4
6
CALC_RQ
Calculates noise covariance
matrices R and Q based on the
configured motor parameters
Table 6.28: ENC_CH4_Ctrl (P783) control word (continue)
P No.
Index Name
Unit Description
339
CON_SCON_Kalman
Kalman: Setting
0
Tf_Kalman
ms
Kalman: Integral time
1
KpScale_Kalman
%
Kalman: Gain
350
CON_SCALC_SEL
Used to select the speed calculation method
0
SEL_ObserverMethod
Selection of speed calculation method
508
0
ENC_CH4_Sel
Selection of encoder type
783
0
ENC_CH4_Ctrl
Control
790
0
ENC_CH4_Kalman_R
Sensorless control: R matrix
791
ENC_CH4_Kalman_Q
Sensorless control: Q matrix
791
0
Q[0,0]
Sensorless control: Q matrix (id)
791
1
Q[1,1]
Sensorless control: Q matrix (iq)
791
2
Q[2,2]
Sensorless control: Q matrix (omega)
791
3
Q[3,3]
Sensorless control: Q matrix (epsilon)
791
4
Q[4,4]
Sensorless control: Q matrix (T load)
792
ENC_CH4_Kalman_
SigInj
Sensorless control: Test signal generator
792
0
Signal
SC test signal: Signal calculation selection
792
1
Frequency
Hz
SC test signal: Sinusoidal signal frequency
Table 6.29: “Sensorless synchronous motor control” parameters