Compact drives promise energy-efficient control
A
Moeller Electric product story
Edited by the Engineeringtalk editorial team
Dec 5, 2005
Building on the success of its popular DF5 and DV5 families of inverter drives, Moeller Electric has launched two new models.
Building on the success of its popular DF5 and DV5 families of inverter drives, Moeller Electric has launched two new models.
The DF51 is designed specifically to provide energy-efficient speed control for fans, pumps and similar variable torque loads, and the DV51 combines high starting torque with accurate sensorless speed control for constant torque applications such as mechanical handling and hoists.
Both of the new drives, which are available with ratings up to 7.5kW, have integral Modbus communication facilities, making them easy to integrate with factory or building automation systems.
Requiring up to 40% less space in the control panel than its immediate predecessor in the Moeller Electric range, the new DF51 V/f drive has built-in PID functionality, making it particularly easy to use in applications requiring flow control.
Its integrated keypad provides straightforward set-up options, as well as keys for manually increasing and decreasing speed.
A 0-10V analogue output is available to allow easy external monitoring of either motor speed or current.
To maximise cost-effectiveness in multi-drive applications, the DV51 sensorless vector drives in the new range have removable keypads, which means that a single keypad can be used to set up many drives.
Removing the keypad also protects the drive very effectively against unauthorised tampering.
Capable of providing starting torque in excess of 200% at 1Hz, DV51 drives feature a completely new auto-tuning system which means that it is no longer necessary to enter detailed motor parameters during set up.
Dynamic current limit and overvoltage stop functions provide enhanced protection for the drive and motor under fault conditions.
To ensure compatibility with modern automation systems, DV51 drives can be fitted with optional cards which supplement the built-in Modbus connectivity by providing facilities for direct connection to Profibus and CANopen fieldbus systems.
The drives also have five programmable inputs and two programmable outputs, allowing simple local control functions to be implemented without the use of additional components.
For applications needing drives with higher power ratings than the 7.5kW offered by the new DF51 and DV51 units, Moeller Electric's established DF6 and DV6 ranges are available.
Between them, these ranges provide efficient and cost-effective V/f and sensorless vector drive solutions for motors up to 132kW.
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