LED Lights, fluorescent or incandescent lamps, we have to understand one of the important parameters - power factor (PFC).
1, power factor of LED High Bay Lights
The power factor characterizes the ability of the lamp output active power. Power is a measure of the energy transfer rate in the DC circuit voltage V and current A and the product (t8 high bay fixtures). In the exchange system is far more complex: that part of the AC current in the loop where the load does not transmit power, it is called reactance current or harmonic current, it makes multiplied by current in the power (voltage Volt Amps) is greater than the actual power.
2, the apparent power of LED Flood Lights
As the product of power: AC voltage and AC current. Formula is expressed as: S = the UI. Where S is the rated output power (t8 high bay fixtures), the unit is VA (voltammetry); U is the rated output voltage, the unit is V, 220V, 380V, etc.; I is the rated output current, the unit is A Apparent power includes two parts: the active power (P) and reactive power (Q).
(3) reactive power
Lamps and all other electronic rely on the DC voltage circuit, leaving the reactive power does not work. General users that the lamps and the like devices will require the active power, without the need for reactive power. Since the reactive power is not acting, you want it and where to use! So of course they think that the power factor is one of the lamp. Because it gives the maximum output power. However, the reality is not the case.
Lamps and all other electronic rely on the DC voltage circuit, leaving the reactive power does not work. General users that the lamps and the like devices will require the active power, without the need for reactive power. Since the reactive power is not acting, you want it and where to use! So of course they think that the power factor is one of the lamp. Because it gives the maximum output power. However, the reality is not the case.
A lamp when the AC mains input rectifier, pulsating DC voltage, if the ripple voltage of any processing, it is provided directly to the lamp, no doubt, the circuit did not work. When the lamp (t8 high bay fixtures) power factor close to 1, but this is what to use it. In order for the lighting circuit to work properly, must provide a smooth DC voltage. "Smoothing" must be performed by the filter capacitor connected to the lamp rectifier behind to complete. This filter is like a reservoir capacitor which must be stored a sufficient number of charge, when the gap between the half-wave rectifier circuit voltage remains uninterrupted, able to maintain a normal level.
没有评论:
发表评论