Frequency converter or frequency is an electronic or electromechanical device that converts alternating current of one frequency to alternating current of another frequency. Frequency conversion may refer to different processes affecting frequency of physical phenomena, for example variable frequency drive is a frequency converter.
Demand for frequency converters is expected to rise in future due to automation of the automotive industry. The ongoing research and testing on autonomous vehicles also requires frequency converters, leading to a rise in their demand. Hybrid vehicles are equipped with frequency converters to manage the transmission of alternating current.
Frequency converters can be categorized based on type, component variation, number of phases, end users, vehicle type, and region.
Based on type, frequency converters can be categorized as static frequency converter and rotary frequency converter. Static frequency converter is a device which alters the frequency of the input signal according to input set point and consists of solid switching devices which act according to the input control signal. Static frequency converters have less installation cost and occupy lesser space. Rotary frequency converters were used for conversion of AC current into DC current before the advent of solid state power rectification and inverting. Rotary converters were made obsolete by the semiconductor rectifiers in the 1960s.
Frequency converters consist of rectifier, DC bus, and inverter. Rectifier and inverter are present in all the frequency converters whereas the DC bus is present only in high quality rectifiers. DC bus converter does not directly contribute to the variable frequency operation.
In terms of the number of phases, frequency converters can be categorized as single phase frequency converter and three phase frequency converter. In single phase frequency converter, the power transmission is in the form of single phase and is generally used in home appliances like refrigerators, washing machines, and hair dryers. In three phase frequency converters, the power transmission is in the form of three phase and each phase can constitute a single phase circuit with neutral point to provide electrical energy for users. Three phase frequency converters are cheaper than the single phase frequency converters.
On the basis of end users, frequency converter can be used at different places in automobiles such as charging the battery of the vehicle and for actuation of the vehicle components. To charge the battery of the vehicle, bi-directional DC-DC type frequency converter is used. To empower the vehicle components for their motion unidirectional DC frequency converter is used.
On the basis of vehicle type, frequency converter can be categorized as passenger vehicles and commercial vehicles. Passenger vehicles are further classified as hatchbacks, sedans, and multi utility vehicles. Commercial vehicles can be further categorized as light commercial vehicles and heavy duty commercial vehicles.
On the basis of geography, the frequency converter automotive market can be segmented into Asia Pacific, North America, Latin America, Europe, and Middle East & Africa. Due to increasing developments in the automotive industry, the frequency converter market is expected to expand in Asia Pacific at a significant pace. Currently, Europe dominates the global frequency converter market due to extensive investments in countries such as Germany, France, and the United Kingdom in the development of aerospace & defense, manufacturing, energy infrastructures, and marine/offshore. The second largest market across the globe is North America.
Key players of in the frequency converter market are Piller Group GmbH, ABB Ltd, Power Systems & Controls Inc., Danfoss, Aplab Ltd., General Electric Company, Sinepower, Siemens, and Magnus Power Pvt. Ltd.
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