Lenze MDFQA Operating Instructions Manuel d'utilisateur télécharger pdf (Page 20)

Technical data

General data and operating conditions

Setting the switching frequency to the rated motor data

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

=4 kHz, the following

consequences must be observed.

Motor type Consequences

MDFQA 160 ¯ At f

= 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

= 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KS

¯ All published rated data remain valid if f

= 4 kHz.

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Lenze MDFQA Operating Instructions Manuel d'utilisateur Page 20