Frequency Converters Manufacturers

Frequency changer or frequency converter is an electronic device that converts alternating current (AC) of one frequency to alternating current of another frequency. These devices are built out of electromechanical components such as motor-generator sets or rotary converters. They usually consist of a rectifier stage, which is then inverted to produce AC of the desired frequency. The inverter may use thyristors or IGBTs. A battery is also added to the DC circuitry to improve the converter's ride-through of brief outages in the input power. Frequency changers vary in power-handling capability from a few watts to megawatts. They are used to control the speed and torque of the AC motors. In this application, the most typical frequency converter topology is the three-phase two-level voltage source inverter. The phase voltages are controlled using the power semiconductor switches and pulse width modulation (PWM). These converters are typically used to control the speed of pumps and fans. Frequency converter also refers to a much-lower-powered circuit that converts radio frequency signals at one frequency to another frequency. The circuit usually consists of a local oscillator and frequency mixer.