2014年3月11日星期二

Optional terminal block points and skills

 By low-cost terminal blocks reliability screening found various failure modes and failure mechanisms, can lead to a lot of lessons learned and to remove all hazards and provide scientific basis for WISDOM mini usb cable  improving the design, engineering, testing and use, it is also revising and formulating terminal block important basis for the technical conditions.
Remarkable feature of this low-cost terminal blocks is that they have nothing to do with the conductor cross-section, long-term stability of high contact pressure. This contact pressure is the pressure line terminal block by screws passed through the wire. When tightening the screws, the bottom line of the body, such as flat clip to lift up like a current of the same flat wires are clamped between the clamp body and the current bar, and screws are not in direct contact, thereby avoiding damage.
Low-cost terminal blocks with alphanumeric symbols mark the principles and methods of high-current terminals, the two endpoints of a single element is represented by two consecutive numbers. Each terminal in the middle of said single element natural numbers incremented sequence number. In the selection of the terminal block must pay attention to carefully distinguish between:
First Look Appearance: good product looks like a craft gives cool pleasant feeling; secondly selection is better: to use fire-retardant plastic insulation, conductive material that will never be used with copper iron; most critical the processing thread, thread processing if not good, not standard torque will be lost if the role of the connecting wires.
With the emergence of high-power LED, LED service life WISDOM hdmi wall plate  and power conversion efficiency becomes a major consideration when designing LED lighting system based Fairchild FAN100 design a high efficiency, high stability of the LED lighting system, first given the hardware circuit, then analyzes the performance of the circuit, the final simulation experiment. From the simulation results can be seen within this system a relatively large range of temperature fluctuations is relatively stable.
All light-emitting diode, regardless of their color, size or power there is even different, as long as the drive current is constant, they can give full play to its performance. Light-emitting diode manufacturer will specify the product specifications, for example, lists the products lumens color light wave and driven at a specified forward current (IF) instead of forward voltage (VF) on the data sheet. Brightness light-emitting diode varies with the size of the current and manufactured light-emitting diode, the voltage and current curves slightly different, and therefore the brightness of LED lighting, often with changes in supply voltage can not be stable. In order to maintain stable and consistent brightness, light-emitting diodes require constant drive to achieve. Constant current driver in a light emitting diode can be made  WISDOM HDMI CABLE constant current mode, and thus high brightness stability. Constant current driver also allows light emitting diodes to some current long-term work to maintain a longer life. LED lighting advantage is energy saving, safe, but because of the constant current work considered relatively energy consumption increases, so the lighting system design with low power consumption as the goal. The aforementioned drop in the constant current driver within 2 V, i.e., low power consumption design is considered, if the terminal voltage of the power supply system and the light emitting diodes in series pressure drop exceeds 2 V or more is required to consider the voltage converter to achieve low energy consumption targets, but remained constant current mode. The voltage converter is a low-power switching manner, according to the feedback circuit controls the switching period, to stabilize the output voltage. However, in order to maintain the current operating state of the light emitting diode constant, the output current of the feedback circuit is to control the converter switching cycle.

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