• Industrial
  • Commercial & Residential
  • Food Retail
  • Refrigeration Racks
  • Heat Pumps
  • Chillers
  • Air Handling Units

High efficiency, high performance cooling capacity control

Installation of Optidrive™ variable frequency drives to control refrigeration compressors can significantly reduce energy consumption.

  • F-gas Regulation

  • Ecodesign Directive

Optidrive™ Compressor Control

Variable Frequency Drives for HVAC-R Systems

  • Improved System Performance

  • Reduced Energy Costs

  • Free Cooling Capacity

Improved System Performance, Reduced Energy Costs, Free Cooling Capacity

Compressors are used in a wide range of HVAC-R systems, providing cooled liquid or gases for industrial, commercial & food retail applications. In the past, this was delivered by running the compressor at full speed, to meet the load demand, and then turning it off when the desired cooling or pressure had been reached. This method of “on-off” control is still used today but is very inefficient. The introduction of AC variable frequency drive technology allows the user to vary the output capacity of the compressor by changing the speed to match the changing system demand. This provides improved system stability, extended compressor life, and lower energy costs.

20% additional cooling capacity

Cooling capacity can be increased on a fixed speed compressor simply by installing an Optidrive™ variable frequency drive. The Optidrive™ allows maximum output speed of the compressor to be increased from 50Hz to 60Hz. Compressor output capacity increases proportionally to output speed so moving from 50Hz to 60Hz creates an additional cooling capacity of 20% – for free. If the compressor being controlled by the variable frequency drive is the lead compressor on a rack system then this increased cooling capacity means the second fixed speed compressor on the rack is required to operate less often. This results in lower energy costs, and extended compressor life.

Optidrive™ is ideal for OEMs and retrofit applications

Optidrive™ variable frequency drives provide a cost effective, energy efficient solution to directly control the output capacity of the compressor to match the changing system demand. It can be supplied enclosed to IP20, for OEMs to install in their electrical control panel, or IP66, ideal for retrofit applications. This allows the contractor and installer to mount Optidrive™ on the wall, inside the electrical switch room, or directly on the compressor rack. This eliminates the need for an electrical control panel.

Sensorless Vector Control for all Motor Types

Precise and reliable control for IE2, IE3 & IE4 motors.

  • Induction Motors (IM)
  • Permanent Magnet Motors (PM)
  • Brushless DC Motors (BLDC)
  • Synchronous Reluctance Motors (SynRM)
  • Line Start PM Motors (LSPM)

Save Energy, Reduce Costs, Improve Safety

Save Energy

  • Improved system control, less stop-starts
  • Soft starting, reducing peak current tariffs
  • Fewer compressors, 20% free cooling capacity

Reduced Maintenance Costs

  • Less stop-starts, extends compressor life
  • Soft starting, reduces the mechanical stress, extending machine life

Motor Technology & Safety

  • STO input, safe torque off, compressor protection
  • PTC input, motor thermal protection
  • Low harmonics, EN61000-3-12 reducing input fuses & cable sizes

Multiple Compressor Rack Control

Multiple cmpressor rack control diagram

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