Shenzhen Tianxiaming Power Co., Ltd. announced that its LED driver and control method has been authorized by the US Patent and Trademark Office (patent number: 728530 release date: June 1, 2010), this patent is authorized by the Chinese in the United States. A patent for LED drive control methods.
When the off time of the power switch is modulated with an input voltage, the turn-off time of the power switch becomes longer when the input voltage is low, and the turn-off time of the power switch becomes shorter when the input voltage is high; When the power switch sets a fixed off time, the off time of the power switch can be preset.
This patent has the following advantages:
1. It is possible to provide a pulse current with a constant rms value, and the current and pulse frequency and duty ratio can be adjusted.
2, small size, high efficiency, high power factor. The drive circuit can be small enough to be directly loaded into a common lamp head, so that the LED lamp can directly replace the current lamp. Since the turn-off time is modulated with the input voltage, the power factor is higher than 0.95 and its efficiency can exceed 95%.
3. It can enhance the luminous intensity of LED and extend the life of LED. Since the constant current provided by the present invention is sufficiently controllable, the maximum current flowing through the LED can be adjusted according to the performance of the LED so that the amount of luminescence of the LED is increased. Due to the pulsed power supply, the LED is in an intermittent operation, so the life is extended. For example, with a duty cycle of 0.5, the lifetime of the LED is doubled accordingly. Moreover, the driving circuit is a high-frequency operation, which fully utilizes the afterglow effect of the fluorescent powder in the LED, not only does not have the phenomenon of light flicker, but also improves the energy-saving luminous ratio of the LED.
XLPE insulated electrical Power Cable consists of below major components: one or more high quality stranded copper or aluminum conducts, XLPE insulation, fixed tape and filler, optional protective armour, overall PVC sheath.
These cables are with simple structure, light weight and high heat resistance. With the development of our technology, our factory is able to manufacturing our products more lighter, durable and flexible for international requirements.
It could be classified into 3 type as below:
Non-armoured XLPE Power Cable(Cu or Al /XLPE/PVC)
Steel Tape Armoured Power Cable(Cu or Al/XLPE/STA/PVC)
Steel Wire Armoured Power Cable(Cu or Al/XLPE/STA/PVC)
Manufacture Standard
This cable is manufactured according to the standard of GB12706-2008(The Same as IEC60502).It can also be manufactured according to IEC,BS,UL as request.
Using features
l Max. permissible continuous operating temperature of conductor is 90℃.
l Max. temperature of conductor during short circuit (5s maximum duration ) shall not exceed 250℃.
l The ambient temperature under installation should not below 0℃.
l The bending radius of a single-core cable: not less than 20
times of cable`s OD
The bending radius of a three-core cable: not less
than 15 times of cable`s OD
Why choose XLPE Insulated Power Cable?
l Heat resistant performance-With XLPE special structure, it will not be decomposed and carbonized up to 300℃ with at most 40 years life time.
l Insulating Performance-Same insulation characteristic as PE, higher electrical resistance and less impact by temperature.
l Mechanical Performance-Higher hardness, stiffness, abrasion resistance and shock resistance.
l Chemical performance-XLPE has higher resistance to acid and alkaline. It only produce water and carbon dioxide, it shows more environmental friendly which could satisfy modern requirements of fire safety.
Application:
This product is suitable for transmission and distribution of electrical power with AC rated voltage 0.6/1Kv,1.8/3 kV,3.6/6 kV,6/10 kV,8.7/10 kV,8.7/15 kV,12/20 kV,26/35kV kV. Such as power distributing systems, industrial plant and others.
You are always welcome to contact us if you have any questions about XLPE electrical power cables. We will offer you professional solutions as you required with attractive price.
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