Moeller - Frequency inverters DF, DV - Features of DF frequency inverters

Features of DF frequency inverters [t-head1-first]

Infinitely variable speed control through voltage/frequency control (U/f)

High starting and acceleration torque

Constant torque in motor’s rated range

EMC measures (optional: radio interference filter, screened motor cable)

Additional features of sensorless vector control for frequency inverters DV51 and DV6 [t-head3]

Infinitely variable torque control, also at zero speed

Low torque control time

Increased concentricity and constancy of speed

Internal brake chopper

Speed control (options for DV6: control module, pulse generator)

General [t-head3]

The DF and DV frequency inverters are factory-preset for their assigned motor rating, allowing drives to be started immediately after installation.

Individual settings can be made with an optional keypad. Various control modes can be selected and configured in a number of layers.

For applications with pressure and flow control, all devices contain a built-in PID controller that can be matched to any system.

A further advantage of the frequency inverters is that they eliminate the need for external components for monitoring and motor protection. On the mains side, only a fuse or circuit-breaker (PHKZ) is needed for line and short-circuit protection. The frequency inverter’s inputs and outputs are monitored internally by measurement and control circuits, such as overtemperature, earth fault, short-circuit, motor overload, motor blockage and drive belt monitoring. Temperature measurement in the motor winding can also be incorporated in the frequency inverter’s control circuit through a thermistor input.