Braking units

Braking units overview

An electronic motor braking device works on the principle of feeding direct current into the stator winding of three-phase induction motors. This generates a standing magnetic field which inhibits the movement of the squirrel-cage rotor. The braking effect depends on the size of the braking current. This is generated by rectifying the supply voltage. The use of thyristors with phase control allows the braking torque to be set over a wide range. DC braking causes a heating up of the motor.

In soft start and braking units or combi units, soft start and DC braking are represented in one unit. This enables very compact, universally applicable solutions.

Applications:
* Electronic braking

LEKTROMIK^® B1

Braking units 2,2 – 7,5 kW

Features	Applications
AC 230 V, AC 400 V, AC 480 V Single-pulse or partially or semi-controlled rectification with truncated half-wave Braking torque and braking time-out separately adjustable Mounting on 35 mm DIN rails Side-by-side mounting Easily retrofitted Can be used without braking contactors Suitable as a combined soft start and brake using the soft start SoftCompact	Woodworking machines Grinding machines Conveyor belts with long running down times Vibration sources Centrifuges Test rigs

Special versions, e.g. 480 V, please inquire

LEKTROMIK^® B4

Braking units 15 – 200 kW

Features	Applications
AC 220 – 500 V Two-pulse or fully controlled rectification with truncated full-wave Braking torque and braking time-out Separately adjustable Detection of zero-speed Operation without braking contactor possible Suitable as a combined soft start and brake using the electronic soft start LEKTROMIK® S2 / SD2 Limiting of maximum braking current	Woodworking machines Vibration motors Roller-table drives in steel plants Machines with high inertia, e.g. mills, compactors, centrifuges

Up to 90 kW UL-certified for the USA and Canada.

Braking units overview

LEKTROMIK® B1

LEKTROMIK® B4

LEKTROMIK^® B1

LEKTROMIK^® B4