Lenze MDFQA Operating Instructions - Manual (Page 20)

Technical data
General data and operating conditions
Setting the switching frequency to the rated motor data
4
EN
20 Lenze ¯ BA 33.0006 ¯ 3.0
4.1.1 Setting the switching frequency to the rated motor data
The rated data are valid for operation on an inverter with a switching frequency of at
least 8 kHz. If operated at a switching frequency of f
ch
=4 kHz, the following
consequences must be observed.
Motor type Consequences
MDFQA 160 ¯ At f
ch
= 4 kHz, the motor continuously reaches only approx. 95 %
of its rated torque.
¯ Strongly increased noise emission
MQA 20, 22, 26
MCA 20, 22, 26 ¯ At f
ch
= 4 kHz, the motor continuously reaches only approx. 95 %
of its rated torque.
¯ Increased noise emission
MCS
MCA 10, 13, 14, 17, 19, 21
MD
LKS
¯ All published rated data remain valid if f
ch
= 4 kHz.