subject: What Is A Variable Speed Dc Electric Motor? [print this page] Variable speed DC electric motors are combinations of efficient motors and special frequency inverters. The purpose of the inverter is to convert the current being fed to the machine from one frequency to another. These devices are highly adaptable and can be used for a number of different services. Successful variable speed machines have perfectly matched parts which allow the whole device to work at maximum performance and efficiency. High quality variable speed DC electric machines are able to significantly improve mechanical handling systems and reduce the costs involved in fan and pump systems.
Despite the more complex construction of variable speed drives, many models are available in compact forms which can be fixed into place with the same mounting as standard models of the same calibre. Like all good pieces of vital machinery, variable speed DC motors should be flexible and safe to use. This is also aided by close coupling systems to the inverter which negate the need for extra cabling and extended troubleshooting processes.
Because of this multi-part construction, the difference between high and low quality variable speed drives can be quite large. Many cheap manufacturers use low quality parts to cut costs, which will end up disintegrating once the variable speed system is used with a full loading. It is important, of course, to select a variable speed drive range that is suited to your purpose and will not overheat under a heavy loading or produce an unnecessary amount of energy for a light application.
In domestic applications, variable speed drives are commonly used in controlling the power supplied to furnace systems. The adjustable drive is able to determine the amount of heated or cooled air the furnace blower delivers to a space. This allows the furnace to heat your home to exactly the right temperature without wasting any energy in the process. The intelligent design of the variable speed drive means that the furnace can respond to changes in the surrounding environment, such as an opened window or cooling weather outside, and alter its air delivery accordingly.
Variable speed DC electric motors are therefore essential to saving electricity consumption in the home and can be used for a similar purpose across a wide number of industries. They allow for a high degree of control over power and mechanical distribution as well as energy efficiency. With variable speed drives, this control is also incredibly easy to attain, as the system works intuitively to conserve energy and adapt to its environment.
by: Harrie Dadhwal
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