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Sprint Electric’s drives for slip ring motors – which will be launched at SPS/IPS/Drives in Nuremberg, Germany, in November – can be used to control the hoist and X/Y movement in cranes.

The JL/X range of slip ring motor drives is a derivation of the PL/X digital DC drive product range, sharing the same software and hardware platforms and delivering the same digital control functionality.

The main difference is that the thyristor stack configuration has been designed to provide a three-phase output (U, V, W) suitable for controlling slip ring motors in two- or four-quadrant modes.

All the fieldbus options, including Profibus, Devicenet, CC-Link, Ethernet/IP, Modbus and CANopen, and configuration software packages used with the PL/X are also available for the JL/X range.

The JL/X range of slip ring motors covers output currents from 100 to 1,850A and comes in three frame sizes with standard supply voltage inputs up to 480V AC.

Overload capability is 150 per cent, or 250 per cent for high-duty applications.

There is also the option of high-voltage units that are able to accept AC supply voltages up to 690V AC for higher-voltage applications.

All models have the high-current three-phase supply terminals in standard top entry, with the motor connections being bottom entry.

The JL/X is supplied configured for crane control as standard with joystick or analogue demand inputs and outputs needed to control up to four external slip ring resistors, together with dedicated outputs for super-synchronous regenerative lowering and brake control.

Sprint Electric’s full range of products include analogue and digital DC drives from 12A up to 2,250A.

Whether in retrofits or original equipment, DC drives from Sprint Electric can be used in metal processing, the pulp and paper industry, rubber and plastic processing, lifting equipment, food processing and the leisure industries.

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