Single- and three-phase alternating current (AC) motor speed can be controlled by controlling the frequency of the voltage coming to it. Motor speed has a lot to do with the capacity of refrigeration ...

Utility power plant generators are usually designed for a power factor (PF) of .8 to .9. If demand-side PF is lower than the designed PF, the generator current will rise above the equipment's rated ...

Global demand for both energy and water conservation is having a tremendous impact on the home appliance market. The regulatory standards and recommendations are redefining a new generation of energy- ...

Designed for high-efficiency heat pump and air conditioning systems, the new Copeland Scroll® variable-speed compressor allows heat pumps to achieve 13 HSPF, 20-plus SEER efficiency, and 40 percent ...

QUESTION: I’ve been told that some technicians don’t like variable speed air conditioners due to their high maintenance costs. Is that true? ANSWER: A variable speed AC runs at a lower speed for ...

The SMVector drive has an input voltage range from 120-Vac, 1-phase to 600-Vac, 3-phase and has four modes of operation: V/Hz, enhanced V/Hz, vector speed, and torque. It has a power range up to 25 hp ...

The AC induction motor is often referred to as the workhorse of the industry because it offers users simple, rugged construction, easy maintenance, and cost-effective pricing. These factors have ...

A mini-split is a small, ductless, split-system air conditioner "Variable speed” refers to how the fan motor operates for the air handler With “zoning,” you can control the temperatures in individual ...