Lenze i550 - Switching Frequencies; Enclosures

•
Single driv
es with high starng duty
•
Sensorless speed control of three-phase AC motors
Switching frequencies
On an inverter, the term "switching frequency" is understood to mean the frequency with
which the input and outputs of the output module (in
verter) are switched. On an inverter, the
switching frequency can generally be set to values between 2 and 16 kHz, whereby the selec-
on is based on the respecve power output
As switching the modules cause heat losses, the inverter can provide higher output currents at
low switching frequencies than at high frequencies. Addionally, it is disnguished between
the operaon at a permanently set switching frequency and a variably set switching fre-
quency. Here, the switching frequency is automacally reduced as a funcon of the device
ulisaon.
At a higher switching frequency, the noise generaon is less.
Features Versions
Switching frequencies
•
2 kHz
•
4 kHz
•
8 kHz
•
16 kHz
•
v
ariable (automac adjustment)
Enclosures
The degree of protecon indicates the suitability of a motor for specic ambient condions
with regard to humidity as well as the protecon against contact and the ingress of foreign
parcles. The degrees of
protecon are classied by EN 60529.
The rst code number aer the code leers IP indicates the protecon against the ingress of
foreign parcles and dust.The second code number refers to the protecon against the ingress
of humidity.
Code number 1 Degree of protecon Code number 2 Degree of protecon
0 No
protecon 0 No protecon
1 Protecon against the ingress of foreign parcles d >
50 mm. No protecon in case of deliberate access.
1 Protecon against vercally dripping water (dripping
water).
2 Protecon against medium-sized foreign parcles,
d > 12 mm, keeping away ngers or similar.
2 Protecon against diagonally falling water (dripping
water), 15 ° compared to normal service posion.
3 Protecon against small foreign parcles d > 2.5 mm.
Keeping away tools, wires or similar.
3 Protecon against spraying water, up to 60 ° to the ver-
cal
4 Protecon against granular foreign parcles, d > 1 mm,
keeping away tools, wire or similar.
4 Protecon against spraying water from all direcons.
5 Protecon against dust deposits (dust-protected), com-
plete protecon against contact.
5 Protecon against water jets from all direcons.
6 Protecon against the ingress of dust (dust-proof),
complete protecon against contact.
6 Protecon against choppy seas or heavy water jets
(ood protecon).
Appendix
Good t
o know
Switching frequencies
140