Sprint Electric's Slip Ring Motor Drives

DN Staff

September 27, 2010

2 Min Read
Sprint Electric's Slip Ring Motor Drives

Sprint Electric now offers drivesfor slip ring motors. The new motor controllers will be introduced in Novemberat SPS/IPC/Drives, the international trade fair for electric automation, systems andcomponents, in Nuremberg, Germany.

A slip ring motor is a type of induction motor having a wound rotorconnected to slip rings. Typical applications for slip ring motors includecranes, where the motors are used to control the hoist, as well as the X/Ymovement.

Sprint Electric's JL/X range of slip ring motor drives is a derivation ofthe PL/X digital dc drive product range. It shares the same software andhardware platforms and delivers the same precise digital control functionalityas the established PL/X range of dc drives. The main difference is that thethyristor stack configuration has been designed to provide a 3-phase output (U,V, W) suitable for controlling slip ring motors in either 2- or 4-quadrantmodes. All the fieldbus options including Profibus,DeviceNet, CC-Link, EtherNet/IP, Modbus and CANopen, and configuration software packages used with thePL/X, are also available for the JL/X range.

The JL/X range of slip ring motors coversoutput currents from 100 to 1850 A and comes in three frame sizes with standardsupply voltage inputs up to 480V ac. Overload capability is 150 percent. Forhigh-duty applications, the JL/XHD range is available with an overload capabilityof 250 percent. There is also the option of high-voltage units that areable to accept ac supply voltages up to 690V ac for higher-voltage applications.All models have the high-current 3-phase supply terminals in standard topentry, with the motor connections being bottom entry. The JL/X is suppliedconfigured for crane control as standard with joystick or analogue demand inputsand outputs needed to control up to four external slip ring resistors,together with dedicated outputs for super-synchronous regenerative lowering andbrake control.

Sprint Electric's fullrange of products include analogue and digital dc drives from 12A up to 2,250A.

Sprint Electric's Slip Ring Motor Drives

Sprint Electric's Slip Ring Motor Drives_A

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