18.3 Glossary
Variables used in calculations:
f
JOG
The motor frequency when the jog function is activated
(via digital terminals).
f
M
The motor frequency.
f
MAX
The maximum motor frequency.
f
MIN
The minimum motor frequency.
f
M,N
The rated motor frequency (nameplate data).
I
M
The motor current.
I
M,N
The rated motor current (nameplate data).
I
VLT,MAX
The maximum output current.
I
VLT,N
The rated output current supplied by the frequency
converter.
n
M,N
The rated motor speed (nameplate data).
P
M,N
The rated motor power (nameplate data).
T
M,N
The rated torque (motor).
U
M
The instant motor voltage.
U
M,N
The rated motor voltage (nameplate data).
U
VLT, MAX
The maximum output voltage.
η
VLT
The efficiency of the frequency converter is defined as the
ratio between the power output and the power input.
Breakaway torque
n
s
= 2 × par . 1 − 23 × 60 s
par . 1 − 39
175ZA078.10
Pull-out
rpm
Torque
Illustration 18.1 Breakaway Torque Chart
General terms and abbreviations:
60
°
AVM
Switching pattern called 60
°
Asynchronous Vector
Modulation (See
parameter 14-00 Switching Pattern
).
Advanced Vector Control
If compared with standard voltage/frequency ratio control,
Advanced Vector Control improves the dynamics and the
stability, both when the speed reference is changed and in
relation to the load torque.
Analog inputs
The analog inputs are used for controlling various
functions of the frequency converter. There are 2 types of
analog inputs:
•
Current input, 0–20 mA, and 4–20 mA
•
Voltage input, 0–10 V DC.
Analog outputs
The analog outputs can supply a signal of 0–20 mA, 4–20
mA, or a digital signal.
Automatic Motor Adaptation, AMA
AMA algorithm determines the electrical parameters for
the connected motor at standstill.
Analog reference
A signal transmitted to the 53 or 54, can be voltage or
current.
Binary reference
A signal applied to the serial communication port (RS485
terminal 68–69).
Brake resistor
The brake resistor is a module capable of absorbing the
brake power generated in regenerative braking. This
regenerative brake power increases the DC-link voltage
and a brake chopper ensures that the power is transmitted
to the brake resistor.
Bus reference
A signal transmitted to the serial communication port (FC
port).
Appendix
VLT
®
Parallel Drive Modules
160
Danfoss A/S © 6/2016 All rights reserved.
MG37N102
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