Sprint Electric now offers drives
for slip ring motors. The new motor controllers will be introduced in November
at SPS/IPC/Drives, theinternational trade fair for electric automation, systems and
components, in Nuremberg, Germany.
A slip ring motor is a type of induction motor having a wound rotor
connected to slip rings. Typical applications for slip ring motors include
cranes, where the motors are used to control the hoist, as well as the X/Y
Sprint Electric's JL/X range of slip ring motor drives is a derivation of
the PL/X digital dc drive product range. It shares the same software and
hardware platforms and delivers the same precise digital control functionality
as the established PL/X range of dc drives. The main difference is that the
thyristor 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-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 1850 A and comes in three frame sizes with standard
supply voltage inputs up to 480V ac. Overload capability is 150 percent. For
high-duty applications, the JL/XHD range is available with an overload capability
of 250 percent. 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 3-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
Sprint Electric's full
range of products include analogue and digital dc drives from 12A up to 2,250A.
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