Recently industry experts have witnessed a surge in the demand for frequency converter or frequency charger. The reason is quite obvious, industries all over the world need energy saving devices in a range of industrial applications and frequency converters are of immense help in resolving the problem to a great extent. The market for frequency converter is expected to enhance by four fold its current size in a couple of years, with reputed suppliers such as Siemens, Groupe Schneider maintaining a major place in the market.
Frequency converter refers to an electronic device that converts AC of one frequency to AC of another frequency. They can also change the voltage, but if it does, that is secondary to its primary purpose. Conventionally a frequency changer is made out of electromechanical components like motor-generator sets or rotary converters. But with the introduction of solid state electronics, you can build totally electronic frequency changers. A frequency converter generally consists of a rectifier stage (producing direct current) which is then reversed to generate AC of the preferred frequency.
If there is a need for voltage conversion, a transformer is generally incorporated in either the ac input or output circuitry and this transformer often gives galvanic isolation between the input and output ac circuits. You can also add a battery to the dc circuitry to improve the converter’s ride-through brief outages in the input power. Frequency changers differ in power-handling potential from a few watts to megawatts.
A frequency changer is widely used for export testing, operating equipment manufactured in a foreign country and avionic applications. They are also used in manufacturing industries and research laboratories where higher frequencies are required for special testing.
Source by Janet Jhon