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Diagnostics Optimization CT MODBUS RTU Technical Data
E300 Design Guide 215
Issue Number: 1
Stator Resistance (B34) = R
Transient Inductance Ld (B33) = L in the d (flux) axis
No Load Lq (B37) = L in the q (torque) axis with no current in the motor
Lq At The Defined Iq Test Current (B40) = L in the q axis with Id = 0 and Iq = Lq At The Defined Iq Test Current (B40)
Lq At The Defined Id Test Current (B42) = L in the q axis with Id = Lq At The Defined Id Test Current (B42) and Iq = 0.
See Stator Resistance (B34).
Most permanent magnet motors include some saliency due to saturation and physical construction. Torque is normally produced by interaction
between the magnet flux and the stator current, but any saliency can be exploited to produce additional torque, which can increase the torque per
Amp produced by the motor. If Saliency Torque control (B36) = 0 (disabled) torque is only produced from the magnet flux. If Saliency Torque control
(B36) is set to a value of 1 or 2, and Rated Torque Angle is non-zero, the saliency of the motor will be used to produce additional torque. If the motor
has low saliency, i.e. Lq < Lq x 1.5 then Saliency Torque control (B36) should be set to 1 otherwise it should be set to 2.
See Rated Torque Angle (AS89) for a list of parameters that should be set up correctly for the motor to derive this value and allow saliency torque to
be exploited correctly.
Lq At The Defined Id Test Current (B42) = L in the q axis with Id = Lq At The Defined Id Test Current (B42) and Iq = 0.
B35 Stator Inductance
Mode Open-loop: RFC-A
Minimum 0.00 Maximum 500.00
Default 0.00 Units mH
Type 32 Bit User Save Update Rate Background read
Display Format Standard Decimal Places 2
Coding RW, RA
B36 Saliency Torque Control
Mode RFC-S
Minimum 0 Maximum 2
Default 0 Units
Type 8 Bit User Save Update Rate Background read
Display Format Standard Decimal Places 0
Coding RW, TE
Value Text
0 Disabled
1 Low
2High
E
f
jwLR
Star connected equivalent circuit of a
permanent magnet
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