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Piezoceramics란?
압전세라믹스는 전계를 가했을 때 일어나는 기계적인 변형과 가해지는 압력에 의해 전압이 발생하는 현상을 띠는 재료로 전기적 에너지와 기계적에너지를 상호 변환하는 변환효율이 매우 높은 재료입니다.
 
Principle of Piezoelectric Transformers
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Principle    
CeraTrans, piezoelectric transformer, transfers electrical energy by electro-mechanical coupling rather than electro-magnetic coupling as in conventional magnetic transformer.
When an alternating voltage is applied to the input section for a frequency corresponding to the mechanical resonance of the piezoelectric transformer, a strong resonant vibration develops across the piezoelectric transformer from reverse piezoelectric effect and then surface charges build up in the output electrode from piezoelectric effect. Voltage transfer ratio is determined by the magnitude of the surface charge generated and the rate of charge drained by a load. The magnitude of surface charge depends on a design of piezoelectric transformer, piezoelectric constants of material and input voltage.
 
 
Clamping and Lead Wire Connection    
CeraTrans is continuously vibrating at resonant frequency microscopically during operation. Therefore, clamping for mounting or connection of lead wires is preferred to be made at nodal points of mechanical vibration as in Fig. 2. Otherwise, it introduces mechanical damping reducing conversion efficiency and increases possibility of connection failure of lead wires.
CeraTrans“ can also be supplied with a package for your convenience.
 
Equivalent circuit
Equivalent circuit of piezoelectric transformer can be described as in Fig. 3 near resonant frequency. C01 and C02 are important parameters for setting inductance of choke coil in the driving circuit and for matching load impedance, respectively.
 
 
Types and Connection Diagram of CeraTrans
Cautions
CeraTrans“ may be damaged if operated with a load open.
The surface of CeraTrans should be kept as clean as possible, especially in the output section.
If dirty, electrical leakage may occur due to a high voltage.
Soldering temperature and time of lead wires should be conformed to the application guide.
Otherwise, CeraTrans may be depolarized or external electrode may be damaged.
 
 
 
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