The key features of our SMW7 servodrive are as follows:

  • Amplifier in rugged housing for DC- and BL-servo motors
  • Various voltage ranges: 12 to 60Vdc, 12 to 350Vdc or 24 to 650Vdc
  • Low voltage version with continuous current up to 100Arms
  • +/-10V analog interface for torque or speed control
  • Compact, enclosed housing with Sub-D connectors
  • High-bandwidth, linear current control (16 bit-resolution)
  • High-efficiency PWM (20/40kHz) with parallel modulation
  • Up to 24kW continuous power
  • Sine-wave or block commutation using hall-effect, resolver or encoder feedback
  • Velocity feedback via DC-tach, resolver, encoder or hall-effect devices
  • Standard feedback (-R): hall-effects, digital encoder and resolver, optional (-E): sine-encoder, absolute encoders (EnDat/Hiperface)
  • Industrial (-CT), extended (-ET) temperature versions and MIL-types (-MT) available
  • Parameter monitoring and configuration from a PC via the RS232-interface (USB soon available) -> no potentiometer, no switches.
  • Custom versions available, also to military standards (option -MT) for MIL-STD electronics requirements.
  • Communications via CANbus. We can implement the customer's own CAN profile in the SWM7 servodrive.


Supported motor feedback formats

The SWM7 supports the following motor feedback formats:

  • Digital Hall sensors
  • Resolver
  • Encoder incremental digital (TTL)
  • Encoder incremental analog (1Vpp sin/cos)
  • EnDAT 2.2
  • SSI
  • BiSS
  • DC-Tacho
  • AMR-Encoder (Anisotropic MagnetoResistive)

On request, the SENT-Protokoll (Single Edge Nibble Transmission) can be implemented.

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Typical projects for the SWM7 servodrive

Our SWM7 servodrives are used for projects typically of the following type:

  • Motor test benches: especially for motors in the Automotive industry with 12Vdc and high currents
  • Motor test benches: especially for Automotive motors using the AMR-sensor (magnetoresistive principle)
  • Pre-development projects in the automotive industry e.g. to drive newly developed PMSM motors in 12Vdc or 48Vdc applications
  • Defence projects e.g. for mobile applications in a harsh environment, using 24-48Vdc power supply
  • Projects, whereby the customer needs special functionality e.g. proprietary control algorithms which require a special servodrive firmware
  • A product related to SWM7 is the LWM7. The "L" stands for "linear". The LWM7 is a linear amplifier which is non-switching i.e. it does not use PWM (pulse-width modulation). This type of drive produces no current ripple and is therefore often used for high-precision or ultra-slow speed applications. Another benefit of a non-switching amplifier is superior EMI/EMC characteristics, as there is no power being continuously switched, which would produce electromagnetic interference. Link to LWM7 family here.

Contact us by email or telephone for technical advice. You can find our contact details here.

Data table SWM7

Modelnominal voltagenominal currentpeak currentL x W x HTemp.

* at base plate