The invention relates to a sheet-type micro refrigerator applying a lead-free ferroelectric material. The micro refrigerator comprises a multi-layer structure which is composed of a ferroelectric dialectric layer and a metal electrode layer alternatively; the ferroelectric dielectric layer is made o.....
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The invention discloses a reactive power compensator, aiming at solving the problem of weak power factor in a power distribution system, which comprises: a DC capacitor used for imitating an AC capacitor or a reactor to generate reactive power compensation current; a solid-state switch and a high-fr.....
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A method for testing the mechanical properties of rock true three-dimensional test system, comprising: a test chamber, which is filled with liquid in a closed chamber; a loading device provided in the test chamber, the loading device for the folder Soil samples of applied load support; dynamometer, .....
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The invention provides a voltage regulation circuit of illuminating lights, which is suitable for an illumination system which is serially composed of a main power source and an illumination load. The single-phase illumination system comprises the main power source which outputs sine alternating cur.....
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The present invention provides a simple and effective compensation for voltage transients of the reference signal generator, which consists of the relay, and the Butterworth filter, linking together, the input signal passes through the reference signal generator to generate a total low harmonic dist.....
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