Emerson E300 Series Design Manual page 214

Safety Product Mechanical
information information installation
is controlled by the elevator controller. This may be resolved by increasing the brake release time in the elevator controller, or reducing Brake Control
Apply Delay (D05), or reducing Motor Torque Ramp Time (D02). The motor torque ramp modifies the symmetrical current limit using a linear ramp
function over the time specified by Motor Torque Ramp Time (D02).
B33 Transient Inductance Ld
Mode Open-loop: RFC-A, RFC-S
Minimum 0.000
Default 0.000
Type 32 Bit User Save
Display Format Standard
Coding RW, RA
See Stator Resistance (B34).
B34 Stator Resistance
Mode Open-loop: RFC-A, RFC-S
Minimum 0.000000
Default 0.000000
Type 32 Bit User Save
Display Format Standard
Coding RW, RA
Open-Loop, RFC-A
The Stator Resistance (B34), Transient Inductance (B33) and Stator Inductance (B35) are derived from the star connected per phase equivalent
circuit of an induction motor shown below.
The steady state parameters are converted to equivalent transient model parameters:
R = R
s 1
L = L
m m
L = L + L
s 1 m
L = L + L
r 2 m
2
σL = L - (L / L )
s s m r
The equivalent drive parameters are:
Stator Resistance (B34) = R
s
Transient Inductance (B33) = σL
Stator Inductance (B35) = L
s
RFC-S
The motor parameters used by the drive are derived from the star connected per phase equivalent circuit of a permanent magnet motor shown below.
214
Electrical Getting
User Menu A Commissioning
installation started
R jwL
1
Steady state per phase star connected equivalent circuit
s
Advanced
Diagnostics Optimization CT MODBUS RTU Technical Data
Parameters
Maximum
Units
Update Rate
Decimal Places
Maximum
Units
Update Rate
Decimal Places
jwL
1 2
jwL
m
of an induction motor
500.000
mH
Background read
3
1000.000000
Ω
Background read
6
R / s
2
E300 Design Guide
Issue Number: 1