Emerson E300 Series - Page 214

Safety
information
Product
information
Mechanical
installation
Electrical
installation
Getting
started
User Menu A Commissioning
Advanced
Parameters
Diagnostics Optimization CT MODBUS RTU Technical Data
214 E300 Design Guide
Issue Number: 1
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).
See Stator Resistance (B34).
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
s
= R
1
L
m
= L
m
L
s
= L
1
+ L
m
L
r
= L
2
+ L
m
σL
s
= L
s
- (L
m
2
/ L
r
)
The equivalent drive parameters are:
Stator Resistance (B34) = R
s
Transient Inductance (B33) = σL
s
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.
B33 Transient Inductance Ld
Mode Open-loop: RFC-A, RFC-S
Minimum 0.000 Maximum 500.000
Default 0.000 Units mH
Type 32 Bit User Save Update Rate Background read
Display Format Standard Decimal Places 3
Coding RW, RA
B34 Stator Resistance
Mode Open-loop: RFC-A, RFC-S
Minimum 0.000000 Maximum 1000.000000
Default 0.000000 Units Ω
Type 32 Bit User Save Update Rate Background read
Display Format Standard Decimal Places 6
Coding RW, RA
jwL
2
jwL
1
R
1
jwL
m
R
2
/s
Steady state per phase star connected equivalent circuit
of an induction motor