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Variable Speed Drive (VSD)
Variable Speed Drive (VSD)
Induction motors that typically used for compressors and fans in air conditioning systems are sized to handle maximum load under worst case conditions and then leaving them to run at full power. They are basically fixed-speed motors. Their speed is determined by the constant frequency of the power supply (typically 50 or 60 Hz).

Variable speed drives (VSD) or frequency inverters are solid-state devices and save energy whenever electric motors run at less than full power. VSD is actually a frequency converter in which 50Hz or 60Hz ac input voltage is first rectified into dc which is then converted back into variable-frequency ac voltage. It must be noted that the power demand of motor varies with the cube of the motor speed, i.e. power is proportional to (speed)3.

This means that a reduction of speed by 20% will result in reduction of power consumption by nearly a half, i.e. 50% saving. Since most HVAC equipment seldom runs at full power, significant energy savings can be made with these variable speed drives.
High Efficiency DC Inverter Compressor
 
High Efficiency DC Inverter Compressor
FUJIAIR VRF Air Conditioner achieves the industry's top class energy efficiency in cooling and heating by utilizing DC inverter compressor, DC fan motor, and high efficiency hect exchanger.
The DC inverter compressor adopts innovative design and numerous high performance key part which can reduce power consumption by 25%.
High Efficiency DC Fan Motor
 
High Efficiency DC Fan Motor
The syetem controls the speed of the fan motor according to the system pressure and system load achieving the minimum power consumption.
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