Lenze MDSLS Servo spindle motor Bedienungsanleitung PDF herunterladen (Seite 17)

Technical data

Rated data

Holding b rak e (option)



BA 33.0003 EN 1.0

3.3 Holding brake (option)

The MDXLS servo motors can optionally be fitted with a spring-operated brake.

The brakes used are not fail-safe brakes in the sense that a torque reduction cannot occur

through uncontrollable interference factors, such as through the entrance of oil.

With long motor supply cables, the ohmic voltage drop along the cable must be observed

and compensated for by a higher voltage at the cable entry.

The following app lies to Lenze system cables:

[

]

[

]

(





⋅

[

]

⋅

[

]

)

U* Resulting supply voltage

[

]

[

]

(



m ⋅ A



⋅

[

]

⋅

[

]

)

Rated voltage of the brake

L Length of cable

Rated current of the brake



Stop!

If no suitable voltage (incorrect size, incorrect polarity) is applied to the brake,

the brake is applied and can overheat and be destroyed by the motor which

continues to run.

Theshortestoperatingtimes of the brakes are achieved by switchingthe voltageon theDC

sideanda suppressor circuit (varistor orspark suppressor).Without suppressorcircuit,the

operating times may increase. A varistor/spark suppressor limits the breaking voltage

peaks. It must be observed that the power limit of the suppressor circuit is not exceeded.

It is dependent on the brake current, brake voltage, disengagement time and the

switchings per time unit.

Thesuppressor circuitis also required for radio interference supp ress i on and for increasing

the service life of the relay contacts (external, not integrated in the motor).

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