Definitions - Danfoss VLT AutomationDrive FC 301 Series Design Manual

Introduction
1 1
min
ms
msb
η
VLT
nF
NLCP
Nm
n
s
Online/Offline
Parameters
P
br,cont.
PCB
PCD
PELV
P
m
P
M,N
PM motor
Process PID
R
br,nom
RCD
Regen
R
min
RMS
RPM
R
rec
s
SFAVM
STW
SMPS
THD
T
LIM
TTL
U
M,N
V
VT
plus
VVC
Table 1.1 Abbreviations
10
Design Guide
Minute
Millisecond
Most significant bit
Efficiency of the adjustable frequency drive
defined as ratio between power output and
power input
Nanofarad
Numerical Local Control Panel
Newton Meters
Synchronous Motor Speed
Changes to online parameters are activated
immediately after the data value is changed.
Rated power of the brake resistor (average
power during continuous braking)
Printed Circuit Board
Process Data
Protective Extra Low Voltage
Adjustable frequency drive nominal output
power as HO
Nominal motor power
Permanent Magnet motor
The PID regulator maintains the desired speed,
pressure, temperature, etc.
The nominal resistor value that ensures a
braking energy on motor shaft of 150/160%
for 1 minute
Residual Current Device
Regenerative terminals
Minimum permissible brake resistor value by
adjustable frequency drive
Root Mean Square
Revolutions Per Minute
Resistor value and resistance of the brake
resistor
Second
Stator Flux-oriented Asynchronous Vector
Modulation
Status Word
Switch Mode Power Supply
Total Harmonic Distortion
Torque limit
TTL encoder (5 V) pulses - Transistor Transistor
Logic
Nominal motor voltage
Volts
Variable Torque
Voltage Vector Control
Rev. 2014-04-04 All rights reserved.
The following symbols are used in this document:
WARNING
Indicates a potentially hazardous situation which could
result in death or serious injury.
CAUTION
Indicates a potentially hazardous situation which could
result in minor or moderate injury. It may also be used
to alert against unsafe practices.
NOTICE!
Indicates important information, including situations that
may result in damage to equipment or property.

1.4 Definitions

Coast
The motor shaft is in free mode. No torque on motor.
Brake Resistor
The brake resistor is a module capable of absorbing the
braking energy generated in regenerative braking. This
regenerative braking energy increases the intermediate
circuit voltage and a brake chopper ensures that the
power is transmitted to the brake resistor.
CT Characteristics
Constant torque characteristics used for all applications
such as conveyor belts, displacement pumps and cranes.
Initializing
If initialization is carried out (14-22 Operation Mode), the
adjustable frequency drive returns to the default setting.
Intermittent Duty Cycle
An intermittent duty rating refers to a sequence of duty
cycles. Each cycle consists of an on-load and an off-load
period. The operation can be either periodic duty or non-
periodic duty.
Set-up
Save parameter settings in four set-ups. Change between
the four parameter set-ups and edit one set-up, while
another set-up is active.
Slip Compensation
The adjustable frequency drive compensates for the motor
slip by giving the frequency a supplement that follows the
measured motor load, keeping the motor speed almost
constant.
Smart Logic Control (SLC)
The SLC is a sequence of user-defined actions executed
when the associated user-defined events are evaluated as
true by the Smart Logic Controller. (Parameter group 13-**
Smart Logic.
MG33BF22