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Σ-7 Servo


Σ-7S Single-axis SERVOPACKs
Σ-7 Servomotors
  • Input voltage,V
  • 1PH 220V~240V
  • 3PH 380V~480V
  • Power range , kW
  • 850W~3.3kW
  • 850W~15kW


  • Created with the design concept of "seven ultimate e-motional solutions," the Σ-7 series delivers the world's highest performance while providing other features such as further improvements in safety and an environmentally friendly design to meet the changing needs of its users. This series offers solutions that are guaranteed to satisfy users in all kinds of scenarios in the life-cycle of systems.


    Ultimate system performance

    The high-performance of Σ-7 SERVOPACKs translates into ultra-high-speed and ultra-high-accuracy control, which maximizes system performance.


    Σ-7S Single-axis SERVOPACKs

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    Ripple compensation


    Σ-7 SERVOPACKs can reduce speed ripples caused by motor cogging, even for machines for which speed loop gains cannot be set high. This ensures smooth operation.

    Enhanced vibration suppression function

    ·Notch filter
    Suppresses high-frequency vibrations of 500 Hz or higher.

    ·  Number of filters increased from 2 to 5.

    Anti-resonance control adjustment
    Suppresses vibrations at frequencies ranging from several hundred Hz to 1 kHz.
    ⇒Vibrations can now be suppressed at two different frequencies (in comparison with one frequency in earlier models).

    Vibration suppression
    Suppresses vibrations at low frequencies (30 Hz and lower).
    ⇒Vibrations can now be suppressed at two different frequencies (in comparison with one frequency in earlier models).


    These functions can be adjusted automatically using the autotuning function.

    High-resolution, 24-bit encoder

    Σ-7 Servomotors (50 W or greater) use encoders with a resolution that are 16 times higher than those used in Σ-V Servomotors.


    High efficiency and low heat generation

    Σ-7 Servomotors use an optimized magnetic circuit that improves motor efficiency and reduces heat generation.
    (comparison with typical models.)


    Ultimately ease to use

    Yaskawa's original tuning-less function has undergone further development.

    Stable operations can be achieved without having to adjust gains.

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