Characteristics of piezoelectric ceramic transformer
Piezoelectric ceramic transformers have the following characteristics:
(1) The output voltage of a piezoelectric ceramic transformer is not only related to length, thickness, and number of layers, but also directly related to frequency. For a step-up transformer, only one input voltage frequency is near the resonant frequency fr (within ±1 kHz), the output voltage can reach the maximum value, and the winding transformer does not have this problem, and can be used in a wide range. Working in the frequency range.
(2) The resonant frequency of the piezoelectric ceramic transformer will shift with temperature. In application, the drive circuit must have frequency tracking capability to keep the output voltage stable.
(3) Piezoelectric ceramic transformer When the input voltage is constant, the output voltage will decrease with the decrease of the load impedance, and the voltage adjustment performance is poor. Therefore, compensation measures must be taken when applying.
(4) The input impedance of the electromagnetic transformer is proportional to the load resistance, and the piezoelectric ceramic transformer is reversed. When the load is short-circuited, it will automatically be powered off without being burned.
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