LED driver power supply currently has insufficient reasons:
The technicians of the company producing LED lighting and related products have insufficient understanding of the switching power supply, and the power supply can work normally, but some key evaluations and electromagnetic compatibility considerations are not enough, and there are certain hidden dangers;
Most of the LED power supply manufacturers are transforming from ordinary switching power supplies to do LED power supply, and the characteristics and use of LEDs are not enough;
There are almost no standards for LEDs, most of which are standards for reference switching power supplies and electronic rectifiers;
Most LED power supplies are not uniform now, so most of them are relatively small. The purchase volume is small, the price is high, and the component suppliers are not very cooperative;
The stability of the LED power supply: wide voltage input, high temperature and low temperature operation, over temperature, over voltage protection and other issues are not solved one by one;
The first is the overall cycle of the driver circuit, especially the key components such as: the cycle of the capacitor at high temperature directly affects the cycle of the power supply;
LED drivers should challenge higher conversion efficiency, especially when driving high-power LEDs, because all power that is not used as light output is dissipated as heat, and the power conversion efficiency is too low, which affects the energy-saving effect of LEDs. Play
At present, in the application of low power (1-5W), the proportion of constant current driving power supply has been close to 1/3, which is close to the cost of the light source, which has affected the market to some extent.
Piezoelectric Ceramic Ring
Applications: ultrasonic vibration tranducer for inkjet printer
Vibration mechanism of inkjet printer:
Generally, it is composed of piezoelectric ceramics and driving rods. By high-frequency electric excitation, piezo ceramics produce high-frequency ultrasonic vibration (above 60 kHz or higher), which is transmitted to the driving rod and generates high-frequency micro-displacement (back and forth expansion) at its front end.
Piezo ceramics components features :
1. High vibration amplitude and can withstand higher power.
2. The product has high reliability, strong maintainability, and is not easy to break down or off-line.
3. The frequency can be adjusted in a wide range, generally within the range of 10KHz.
Yuhai support all the new developping transducer, Welcome the customized elements inquiry.
The present Piezoelectric Elements For Inkjet Piezo Transducer is following :
Piezo rings OD4*ID2*2.5mm price USD1.20/pc, 2000pcs
Material: PBaS-4
Fr.: 694 KHz ±5KHz
K33: ≥0.55
Tg loss <0.5%
Ct 60pF ±12.5%
Piezo rings OD4*ID2*2.5mm price USD1.20/pc, 2000pcs
Material: PSnN-5
Fr.: 626KHz ±5KHz
K33: ≥0.57
Tg loss < 2%
Ct 53pF ±12.5%
Piezo rings OD6*ID2.5*2mm price USD1.50/pc, 2000pcs
Material: PZT-41
Fr.: 785 KHz ±5KHz
K33: >0.53
Tg loss < 0.5%
Ct 107 pF ±12.5%
Piezo Rod OD3*7mm price USD1.20/pc, 2000pcs
Material: PLiS-51
Fr.: 192 KHz ± 3KHz
K33: >0.62
Tg loss < 2%
Ct 18.7 pF ±12.5%
Piezoelectric Elements For Inkjet Piezo Transducer
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Zibo Yuhai Electronic Ceramic Co., Ltd. , https://www.yhpiezo.com