VF1A Doesa Variable Frequency Drives


The line of VF1A Doesa variable frequency drives (VFDs) provide versatile control and efficient operation of electrical motors for a wide range of applications. They are suitable for speed control of variable and constant torque applications ranging from fans and pumps to specialized equipment. The VFD is capable of driving an induction motor or a permanent magnet synchronous motor.


The product family features a compact form factor in a UL open-type construction, with nickel and tin-plated bus bars and conformal coatings for corrosion protection. The VFD is designed for a long operating life and provides a maintenance alarm signal.


Electrical input is nominally rated as three-phase low voltage AC 400V (with an allowable input voltage range of 380 to 480V AC), and the VFDs come in 14 models with a capacity range of up to 139A. Each VFD is quadruple rated for varying duties so users can minimize the number of models needed to handle a wide range of applications.


Other advanced functionality includes control of mechanical brakes, a built-in braking transistor, regeneration avoidance, and low-voltage ride through. Safe torque off capability ensures the VFD fulfills functional safety standard requirements while eliminating the need for external circuit breakers.


Logic programming with 55 functions, different calculations and sequences, and fast processing intervals lets designers eliminate other small controllers and adapt the VFD to meet special requirements. The VFD also includes seven digital inputs, two analog inputs, three digital outputs, and two analog outputs for added control functionality.


  • Customizable logic
  • Functional safety
  • Flexibility
  • Built-in advanced features
  • Durable design
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