Control Resources
Variable Frequency Drives

The off-the-shelf SmartFan Stratus II VFD (variable freqency drive) is designed to control single phase and three phase fractional HP motors via a DC voltage signal, current signal, thermistor, potentiometer, contact closure or Modbus RTU network. Each unit can be customized in minutes using the menu driven SmartFan Navigator handheld remote.

Control Resources also specializes in customizing off-the-shelf controls and designing all new custom variable frequency drives. Some of the features CRI has added to custom VFDs include power ratings up to 2 HP (single phase and 3 phase), power factor correction, programmable keypads, custom connections and enclosures.

Standard Variable Frequency Drive – SmartFan Stratus II VFD


SmartFan Stratus II Variable Frequency Drive Features:

  • Pricing as low as $126 each for 50+ piece orders, under $100 in higher volume
  • 6 programmable control schemes, 18 programmable variables
  • Available with or without a metal enclosure
  • Factory customization and programming for VFD orders as small as 50 pieces
  • Single phase input, single phase or 3 phase output
  • Two new simplified programming options
    • Windows PC USB using Modbus master application
    • Navigator handheld, menu driven, remote programmer
  • Made in the USA

Custom VFD Options Include

  • Power ratings up to 2 HP
  • 3 phase or single phase inputs and outputs
  • Power factor correction
  • Programmable keypad
  •  vfdul recogsmall4 and other safety agency approval services

Custom VFD Design Examples:

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Initially designed for our own engineering lab, CRI also offers versatile, low cost test equipment for test benches, laboratories, field work and repair facilities.