What is the PF power factor value of LED tube?
The LED tube power supply is a very important component in the tube, also known as the driver. The quality of the power supply directly affects the service life of the LED tube. If the LED tube is compared to a human being, then the power source is the human heart. It can be seen the importance of the power supply, so the power supply is also called the soul of the LED tube by industry insiders. One of the parameters is called the power factor or PF value. What is the significance of the power supply?
Power factor: Power factor is the cosine value of the phase difference between voltage and current. Because both current and voltage are wave graphs, one is a sine graph and the other is a cosine graph; because the two waveform graphs differ by 1/4 period (ie: 90 degrees), the PF value is formed. In order to increase the PF value, it is necessary A correction circuit is added to the power supply, so the cost of a power supply with a high PF value is relatively higher. The PF value without a PF correction circuit is generally around 0.6, and the PF value with a PF circuit can basically reach around 0.9 or even higher. What is the specific performance in led fluorescent lamps? Look at the power meter, under the same power, the PF value is high, the current consumption is low, on the contrary, the PF value is low, the current consumption is high. This means that the PF value is also an energy-saving indicator. Some cheap LED tubes with a power factor of less than 0.5, we call it no PF. Of course, the energy-saving effect will be discounted. When the PF value is low, it will produce the power grid of the entire power supply system. Pollution, when the PF value is low, the utilization rate of power generation from the power grid by electrical equipment becomes lower. Therefore, the state has PF value requirements for some high-power electrical equipment.
