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VT Characteristics
Variable torque characteristics used for pumps and fans.
60° AVM
Switching pattern called 60°Asynchronous Vector Modulation (par. F-37
Adv. Switching Pattern
).
Power Factor
The power factor is the relation between I
1
and I
RMS
.
Power
factor
=
3
x
U
x
I
1
cos
ϕ
3
x
U
x
IRMS
The power factor for 3-phase control:
=
I
1
x
cos
ϕ
1
IRMS
=
I
1
IRMS
since
cos
ϕ
1 = 1
The power factor indicates to which extent the frequency converter imposes
a load on the mains supply.
The lower the power factor, the higher the I
RMS
for the same kW performance.
IRMS
=
I
1
2 +
I
5
2 +
I
7
2 + .. +
In
2
In addition, a high power factor indicates that the different harmonic currents are low.
All frequency converters have built-in DC link reactor in the DC link to have a high power factor and to reduce the THD on the main supply.
AF-650 GP Design Guide
10
1
Summary of Contents for AF-650 GP Series
Page 5: ...AF 650 GP Design Guide 4 1...
Page 53: ...AF 650 GP Design Guide 52 4...
Page 97: ...Please note airflow directions 6 1 5 Mechanical Dimensions AF 650 GP Design Guide 96 6...
Page 98: ...Please note airflow directions AF 650 GP Design Guide 97 6...
Page 99: ...Please note airflow directions AF 650 GP Design Guide 98 6...
Page 100: ...Please note airflow directions AF 650 GP Design Guide 99 6...
Page 173: ...Max cable length 150 m AF 650 GP Design Guide 172 9...
Page 179: ...AF 650 GP Design Guide 178 9...