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If your Refu, Rexroth Bosch Group or Rexroth Indramat drive is badly damaged or you would just prefer a new, more reliable unit, we can provide a new replacement drive which may in many cases improve your application.


Typical improvements are:

- better overall reliability of the drive and of the whole machine

- lower motor losses (heat) resulting in longer bearing and winding life

- short circuit protection on output, protecting the drive even with repeated shorts

- better control of the process (speed and load).

Our experience with Refu, Rexroth Bosch Group and Rexroth Indramat drives enables us to provide replacement drives which satisfy all special requirements for your application. Our drives are designed with typical Refu, Rexroth Bosch Group and Rexroth Indramat applications in mind and are well suited to replace old  drive units including 316 and RS51.

For more information on our SPINDEL Master™ or AV Series™ line of drives please visit us at our home page,

  • Best solution for very high speed AC motors and motorized spindles

  • Motor frequency up to 6,000 Hz as standard (360,000 RPM for a 2 pole motor)

  • PAM control with active output filter eliminates low order current harmonics

  • No need for motor inductors

  • Very low motor losses

  • Low voltage peaks and dv/dt

  • Suited for induction (asynchronous) motors

  • Very fast and accurate load measurement and programmable load thresholds

  • Two programmable temperature sensor inputs (PTC style, KTY 84, PT 1000)

  • Dynamic braking with internal resistors

  • Various serial interface options



  • 380-460 V, 6-68 Amps

  • 100-240 V, 11-38 Amps

  • ​Universal high frequency PWM drives with synchronized carrier

  • Suited for variety of applications, from 50 Hz to 3,200 Hz rated motors

  • Output filter included

  • Suited primarily for induction (asynchronous) motors

  • Fast and accurate load signal for process optimization (torque and power)

  • Thermistor (PTC) sensing circuit for monitoring of motor temperature

  • Dynamic braking with internal resistors

  • Many programmable control inputs and outputs

  • Simple operation of multiple motors connected in parallel

  • Long list of available options and modifications



  • 380-460 V, 3-250 Amps

  • 208-240 V, 5-80 Amps

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