Definitions; Frequency Converter; Input; Motor - Danfoss VLT AutomationDrive FC 360 Design Manual

Introduction
1 1

1.2 Definitions

1.2.1 Frequency Converter

Coast
The motor shaft is in free mode. No torque on the motor.
I
VLT, MAX
Maximum output current.
I
VLT,N
Rated output current supplied by the frequency converter.
U
VLT,MAX
Maximum output voltage.

1.2.2 Input

Control commands
Start and stop the connected motor with LCP and digital
inputs.
Functions are divided into 2 groups.
Functions in group 1 have higher priority than functions in
group 2.
Group 1
Group 2
Table 1.1 Function Groups

1.2.3 Motor

Motor running
Torque generated on the output shaft and speed from
0 RPM to maximum speed on the motor.
f
JOG
Motor frequency when the jog function is activated (via
digital terminals).
f
M
Motor frequency.
f
MAX
Maximum motor frequency.
f
MIN
Minimum motor frequency.
f
M,N
Rated motor frequency (nameplate data).
I
M
Motor current (actual).
I
M,N
Rated motor current (nameplate data).
6
Reset, coasting stop, reset and coasting stop,
quick-stop, DC braking, stop, and [OFF].
Start, pulse start, reversing, start reversing, jog,
and freeze output.
Danfoss A/S © 09/2014 All rights reserved.
Design Guide
n
M,N
Rated motor speed (nameplate data).
n
s
Synchronous motor speed
2 × par . 1 − 23 × 60 s
ns =
par . 1 − 39
n
slip
Motor slip.
P
M,N
Rated motor power (nameplate data in kW or hp).
T
M,N
Rated torque (motor).
U
M
Instantaneous motor voltage.
U
M,N
Rated motor voltage (nameplate data).
Breakaway torque
Torque
Illustration 1.1 Breakaway Torque
η
VLT
The efficiency of the frequency converter is defined as the
ratio between the power output and the power input.
Start-disable command
A stop command belonging to the group 1 control
commands. See chapter 1.2.2 Input for more details.
Stop command
A stop command belonging to the group 1 control
commands. See chapter 1.2.2 Input for more details.

1.2.4 References

Analog reference
A signal transmitted to the analog inputs 53 or 54, can be
voltage or current.
Binary reference
A signal transmitted to the serial communication port.
Pull-out
rpm
MG06B402