High-power output piezoelectric power converter

Abstract

The invention discloses a high-power output piezoelectric power converter, applying to the AC-DC or AC-AC piezoelectric power converter. In the invention, at least one third piezoelectric component replaces a capacitor arranged between a rectifying circuit and a power factor correcting circuit; at least one first piezoelectric component replaces a capacitor arranged in a resonance circuit; and at least one second piezoelectric component replaces a capacitor arranged on an output terminal of the rectifying circuit. The piezoelectric components have the advantages of small leakage current, high pressure resistance, good conversion efficiency, small volume and the like, thus reducing the danger of low pressure resistance and ignition owing to overheat in the common capacitor.

Description

【Technical field】 [0001] The invention relates to a high-power output piezoelectric power converter, in particular to a power converter that utilizes piezoelectric components to increase power output. 【Background technique】 [0002] Currently, more and more portable devices provide color screens, stereo audio, and advanced features such as connectivity, such as GPRS, wireless networking, and Bluetooth, as well as video and camera capture. Compared with bloated and bulky portable devices, consumers expect product design that is not only thin and light, easy to operate, but also has a long battery life. Consumer preferences have created a dilemma for circuit design engineers: they must provide more power to the system and generate more banks of voltage, but at the same time, the space and battery capacity available for power supplies in portable products But it is decreasing day by day. [0003] In order to meet these technical requirements, designers must use higher efficie...

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Problems solved by technology

[0003] In order to meet these technical requirements, designers must use higher efficiency power supplies. However, in the circuit of general power converters, general capacitors are used in series or in parallel with inductors for resonance effect. However, the capacitance of general capacitors is low. If the input voltage If the signal is too large, it will cause a large leakage current, the efficiency of power output is not high, and the voltage resistance of the capacitor is insufficient, the failure mode will cause the capacitor to explode, which may easily lead to the danger of fire

In addition, the general power supply will use a coil-type step-up transformer to increase the output power. However, if it is to provide high power, the capacity of the coil-type transformer itself must be very large, in addition to the efficiency loss and cost increase of the magnetic core. , the weight and large volume are also contrary to the requirements of thinness and shortness

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