T4421WAB Tachsyn Transducer 1/2″ Bore

Model T4421WAB Tachsyn Transducer 1/2″ Bore, part of the Tachsyn tach/commutator series from ServoTek Products, 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

 

 


 

   

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