The device that controls the fan speed is called a variable speed drive. Variable frequency drives are also used on pumps and cooling towers to match the demand of the space with the proper energy ...

announced today the expansion of its variable speed technology platform, integrating compressors, drives, and controllers for heating, cooling and refrigeration systems. This integrated solution ...

The performance of the system was evaluated considering operating efficiency and stability and the scientists found that a device relying on a variable-speed compressor and an MPPT controller ...