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RAJ306101 RSSK User's Manual
3.2.2
Board Settings
In sensorless vector control, the motor position is inferred from the current flowing in each phase.
The phase currents can be sensed by connecting both ends of the shunt resistors (SR1, SR2, and SR3) of
each phase to the built-in differential amplifiers of the smart gate driver or the external current sense circuit. In
the sample program, the built-in differential amplifiers are disabled, and the external current sense circuit is
used for the phase current sensing.
Align the board connection settings on the Evaluation Board with Figure 3-3.
For details on the circuit diagram of the Evaluation Board, refer to the Schematic (R12TU0224EJ).
Note.1: This setting is factory default setting. The sensorless vector control can be evaluated without changing the board connection
setting from factory default setting.
SR4
U
V
W
R162
R161
R164
R163
R166
R165
R336
R21
R337
R22
0
0
0
0
R338
0
R339
0
R340
0
R341
0
0
： Short (0[Ω] resistor or solder)
： Mount register
： Not mount (open)
： Short (jumper pin)
Figure 3-3 Board Connection Settings (Sensorless Vector Control)
R12UZ0129EJ0100
Rev.1.00
Nov 1, 2023
SR1
SR2
SR3
0
0
0
0
0
0
R26
R27
R351 R360
R34
0
R35
0
R36
0
R37
0
R354 R361
R357 R362
C12
C13
R24
Chapter 3. Usage
Note.1
R150
R126
R148
R124
JP302
C14
JP303
R25
JP301
Page 18 of 55
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