Frequency converters are a special type of transducer that converts large amounts of power from one distribution standard to another. They are electronic or electromechanically controlled devices that are able to convert AC (alternating current) of a certain frequency to another frequency.
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Frequency converters are composed of a rectifier stage that is inverted to become AC and used in motor generators, rotary converters and they are also sometimes solid state electronics. They save on both power and energy, and sometimes may alter the power supply's voltage as well, although that is more of a side effect than an intentional modification. Frequency convertors are used to control the speed and torque of AC motors, as well as to control the speed of pumps and fans. They are mostly found within industrial applications that use an AC motor or power supply and are rarely if ever used in commercial or residential applications. They have capacities ranging from a few watts to many megawatts, and their frequency ranges change as well. There are two main types of frequency convertors, each of which are employed for very different applications.
Often, frequency converters will use batteries to improve their demand performance during short input power outages or brown outs. They come in many sizes and are sometimes small enough to be considered portable. These specialized transducers are also able to convert periodic signals into their digital or analog equivalents that are shown on the power supply's monitoring screen. There are many different types of frequency converters, which mostly differ in their output characteristics, including grid voltage and current. The conversion is accomplished either directly or through an intermediate circuit. Rotary power frequency converters are employed to use input power that runs a motor. That motor powers a generator, thus producing the desired amount of output power. They can be belt driven, coupled inline or single shaft. The other type of frequency converter is called a solid state unit. This kind converts AC into DC power, and then converts the DC power into the desired voltage. They are simpler than rotary frequency converters, and have few moving parts, including a cooling fan. They are low maintenance, easy to manufacture and are easy to repair if needed. They use gate bipolar transistor inverters as the output stage and use a microcontroller to generate frequency and voltage, to provide dampening and regulate and compensate voltage in a brown out or power outage.
