Latest generation compact unit for excitation of synchronous generators and motors with integrated power section

Compact unit with integrated power section for excitation of brushless synchronous machines or synchronous machines with excitation machine

The XD3S DC exciter is an exciter with integrated power section for DC currents for excitation of synchronous generators and motors. It is designed for the operation of synchronous machines with low excitation current or auxiliary excitation current requirements.





Operating voltage: 3 x 250 V AC 

Control deviation: 0,25 %

Redundant operating voltage supply

Direct current: 25 A continuously, 40 A for 30 s

Suitable for:  Synchronous machines






Parameterization is performed via the powerful EM3000 Engineering Manager, which is available as PC application software and is connected to the controller via the Ethernet service interface.



Operating modes

Voltage control (PID)

Excitation current control (PID)

Uf-controller / open loop operation

Bumpless switching between all operating modes

Reactive power statics

Active power stabilization

Operating modes and setpoints controllable via galvanic inputs or Modbus

Power factor correction (PID) at machine or grid transfer point




Limiters and additional functions


Armature current limitation for mains and short-circuit operation (AMZ with maximum current stage)


Reactive power statics, reactive current compensation control for parallel synchronous machines

Under-excitation limitation, definition via straight line segments

Excitation current limitation (AMZ with maximum current stage)

Active power stabilization PSS2A, B, C

Excitation control, overshoot-free (soft start)

Static voltage maintenance / reactive power provision according to VDE-AR-N 4110 / 4120:2018-11 (section 10.2.2)

V/f reduction

Setpoint synchronization for redundant systems

 Grid synchronization



Machine monitoring and control

Stator voltage monitoring UMZ, 3-stage

Diode fault detection in brushless operation

Stator current monitoring UMZ, 3-stage