Four arrays of three MFC patches, glued onto a rotating shaft, were compared in laboratory research. The first array was based on delta circuit and equipped with one three-phase rectifier; the second star third parallel connection full-bridge rectifiers; fourth series rectifiers. generated highest value maximal electric power comparison to rest arrays. It experimentally observed that or circuit...

The invention of the Silicon Controlled Rectifier (SCR) in the late 1950s, today known as thyristor has led to the revolution in the control of electric power, i.e. in the field of power electronics. At present, about 70% of electric power is consumed by the process of power electronic equipments, and it is expected to grow up in the future. This paper is dedicated to the 50th anniversary of th...

We briefly introduce the source and harm of aircraft grid harmonic and summarise the common methods of harmonic reduction, such as passive filter, multi-pulse rectifier, power factor correction and active power filter. Then we introduce the disadvantages of the above methods, analyse the application status, advantages and deficiencies of active power filter in aircraft grid harmonic reduction, ...

The increasing energy demands of the world's population and the quickly diminishing fossil fuel reserves together suggest the urgent need to secure long-lasting alternative and renewable energy resources. Here, we present a THz antenna integrated with a rectifier (rectenna) for harvesting infrared energy. We demonstrate a resonant bowtie antenna that has been optimized to produce highly enhance...

A prototype Integrated Power System that is representative of advanced power systems of future warships is considered. This system is comprised of an AC Generation and Propulsion System as well as a DC Zonal Electrical Distribution System. Obtaining accurate average-value models of individual subsystems that can be used for extracting the input/output impedance as well as for increasing the sim...

The detection of acoustic signals is of relevance for a range of practical applications, for example in medical diagnostics. However, whereas rectification of electric current and other energy forms such as thermal flux has been demonstrated, acoustic rectification has not yet been achieved. Here, on the basis of the earlier theoretical proposal of an 'acoustic diode', we present the first expe...

How to deal with and use of electricity efficiently from the thermoacoustic power generation system, including the rectifier, inverter, storage, are another question faced with. The reason was analyzed based on thermal acoustic instability and the oscillation amplitude difference. The idea was put forward how to solve thermoacoustic wave instability or oscillatory amplitude difference. If power...

ABSTRACT: In this paper a bridgeless Cuk rectifier is used for Power factor correction (PFC) for a BLDC motor. Bridgeless Cuk converter has only two semiconductor switches in the current flowing path. During each interval of the switching cycle it result in less conduction losses and an improved thermal management compared to the conventional Cuk PFC rectifier. To achieve almost unity power fac...

This paper presents a self-powered piezoelectric energy harvesting circuit using frequency conversion. A vibration energy harvesting principle is introduced. Due to a capacitive characteristic of the piezoelectric vibration transducer, an energy harvesting circuit is proposed for matching the capacitive impedance. The energy harvesting circuit consists of a matching circuit with up-conversion, ...