T5401WAC Tachsyn Transducer

Model T5401WAC Tachsyn Transducer from ServoTek Products, part of the Tachsyn tach/commutator family, are unique transducers that can be used as brushless dc tachometers or brushless dc motors. They provide a true tachometer signal and full-time analog commutation control. A miniature remote mounted circuit board (CT-4) provides as field excitation for the transducer as well as the required conditioning for the output signal.

  • Linear, low noise tach signal down to zero speed
  • High accuracy commutation as 6-step Hall-equivalent outputs
  • Elevated temperature operation up to 155 degree Celsius
  • Low inertia, passive rotor for high speeds and rapid acceleration

Contact customerRFQ@marshbellofram.com for pricing and ordering information.




Commutation Outputs      

  • Number of pole                      4
  • Number of phases                 3
  • Angle “on” each phase         180° ±2°
  • Angle between phases         120° ±2°
  • Output volts                          dc bus
  • Output impedance               1000 ohms


Tachometer Output

  • Linearity (entire range)       ±0.1%
  • Volts/1000 rpm                    1.0 Vdc ±10%
  • Ripple                                     ±2%
  • Max. output voltage            dc bus-1 Vdc
  • Min. load resistance            10 K ohms
  • Bandwidth to 45° shift        1000Hz (typ)
  • Offset volts                            2 mV
  • Temp. coefficient                 -0.05%°C (typ)


Power Supply

  • Max. current at ±12 Vdc      0.060 A
  • Max. current at ±15 Vdc      0.075 A


Moment Of Inertia

  • ½” Bore                           0.94 x 10-4  oz-in.-sec²