Emerson unidrive sp User Manual

Menu 4
Parameter
structure
Keypad and
display
Parameter
x.00
Parameter
description format
Advanced parameter
descriptions
Macros
Serial comms
protocol
Electronic
nameplate
Performance RFC mode
98 Unidrive SP Advanced User Guide
www.controltechniques.com Issue Number: 10
Open-loop
The torque demand is the sum of the torque reference (Pr 4.08) and the torque offset (Pr 4.09), if enabled. The units of the torque demand are % of
rated torque. 100% rated torque is defined as the torque produced by 100% rated active current.
Closed-loop vector
The torque demand can be derived from the speed controller and/or the torque reference and offset. The units of the torque demand are % of rated
torque. 100% rated torque is defined as the torque produced by 100% rated active current.
Open-loop
The current demand is derived from the torque demand. Provided the motor is not field weakened the torque and current demands are the same. In
field weakening the current demand is increased with reduced flux:
Pr 4.04 = Pr 4.03 x frequency / rated frequency
The current demand is subject to the current limits.
Closed-loop vector and Servo
The current demand is derived from the torque demand. Provided the motor is not field weakened the torque and current demands are the same. In
the field weakening range the current demand is increased with reduced flux unless Pr 5.28 = 1. The level of flux is derived from the motor model
within the drive controllers.
Pr 4.04 = Pr 4.03 x flux / rated flux
Regen
The current demand is the output of the voltage controller in Menu 3 subject to the current limits.
4.03 Torque demand
Drive modes Open-loop, Closed-loop vector, Servo
Coding
Bit SP FI DE Txt VM DP ND RA NC NV PT US RW BU PS
111111
Range Open-loop, Closed-loop vector, Servo ±TORQUE_PROD_CURRENT_MAX %
Update rate 4ms write
4.04 Current demand
Drive modes Open-loop, Closed-loop vector, Servo, Regen
Coding
Bit SP FI DE Txt VM DP ND RA NC NV PT US RW BU PS
111111
Range
Open-loop, Closed-loop vector, Servo,
Regen
±TORQUE_PROD_CURRENT_MAX %
Update rate 4ms write
4.05 Motoring current limit
Drive modes Open-loop, Closed-loop vector, Servo,Regen
Coding
Bit SP FI DE Txt VM DP ND RA NC NV PT US RW BU PS
11 1 111
Range
Open-loop, Closed-loop vector,
Servo,Regen
0 to MOTOR1_CURRENT_LIMIT_MAX %
Default
Open-loop
Closed-loop vector, Servo,Regen
165.0*
175.0*
Second motor
parameter
Open-loop, Closed-loop vector,
Servo,Regen
Pr 21.27
Update rate Background read
4.06 Regen current limit
Drive modes Open-loop, Closed-loop vector, Servo,Regen
Coding
Bit SP FI DE Txt VM DP ND RA NC NV PT US RW BU PS
11 1 111
Range Open-loop, Closed-loop vector, Servo 0 to MOTOR1_CURRENT_LIMIT_MAX %
Default
Open-loop
Closed-loop vector, Servo,Regen
165.0*
175.0*
Second motor
parameter
Open-loop, Closed-loop vector,
Servo,Regen
Pr 21.28
Update rate Background read

Emerson unidrive sp Specifications

General

Brand	Emerson
Model	unidrive sp
Category	Controller
Language	English