Figure 6-2 Fixed And Variable V/F Characteristics - Emerson unidrive sp User Manual

Safety Product Mechanical
Information Information Installation

Figure 6-2 Fixed and variable V/f characteristics

Motor
voltage
AC supply
voltage
0.09 {3.12} Speed controller differential feedback gain
RW Uni
CL 0.00000 to 0.65535(s)
Closed-loop
Pr 0.09 (3.12) operates in the feedback path of the speed-control loop in
the drive. See Figure 11-4 on page 176 for a schematic of the speed
controller. For information on setting up the speed controller gains, refer
to Chapter 8 Optimization on page 137.
6.2.5 Monitoring
0.10 {5.04} Estimated motor speed
RO Bit FI
OL ±180,000 rpm
Open-loop
Pr 0.10 (5.04) indicates the value of motor speed that is estimated from
the following:
0.12 Post-ramp frequency reference
0.42 Motor - no. of poles
0.10 {3.02} Motor speed
RO Bi FI
VT ±Speed_max rpm
Closed-loop
Pr 0.10 (3.02) indicates the value of motor speed that is obtained from
the speed feedback.
0.11 {5.01} Drive output frequency
RO Bi FI
OL ±SPEED_FREQ_MAX Hz
VT ±1250.0 Hz
Open-loop & closed loop vector
Pr 0.11 displays the frequency at the drive output.
0.11 {3.29} Drive encoder position
RO Uni FI
0 to 65,535
SV
16
1/2 ths of a revolution
Servo
Pr 0.11 displays the position of the encoder in mechanical values of 0 to
65,535. There are 65,536 units to one mechanical revolution.
114
Electrical Getting Basic
installation Started parameters
I
MOTOR
Frequency
US
0.00000
NC PT
NC PT
NC PT
NC PT
www.controltechniques.com
Running SMARTCARD
Optimization
the motor operation
0.12 {4.01} Total motor current
RO Uni FI
0 to Drive_current_max A
Pr 0.12 displays the rms value of the output current of the drive in each
of the three phases. The phase currents consist of an active component
and a reactive component, which can form a resultant current vector as
shown in the following diagram.
Active
current
The active current is the torque producing current and the reactive
current is the magnetizing or flux-producing current.
0.13 {4.02} Motor active current
RO Bi FI
OL
±Drive_current_max A
VT
Open-loop & closed loop vector
When the motor is being driven below its rated speed, the torque is
proportional to [0.13].
0.13 {7.07} Analog input 1 offset trim
RW Bi
SV ±10.000 %
Servo
Pr 0.13 can be used to trim out any offset in the user signal to analog
input 1.
6.2.6 Jog reference, Ramp mode selector, Stop and
torque mode selectors
Pr 0.14 is used to select the required control mode of the drive as follows:
0.14 {4.11} Torque mode selector
RW Uni
OL
CL
Setting Open-Loop
0 Frequency control
1 Torque control
2
3
4
Onboard Advanced Technical
PLC parameters Data
NC
Total current
Magnetising current
NC
0 to 1
Speed control (0)
0 to 4
Closed-Loop
Speed control
Torque control
Torque control with speed override
Coiler/uncoiler mode
Speed control with torque feed-
forward
Unidrive SP User Guide
UL Listing
Diagnostics
Information
PT
PT
US
0.000
US
Issue Number: 13