Technical Analysis: LED Power Inductive DC-DC Boost Principle
Inductance is a component we use for a long time in transformer design. Its main function is to convert electrical energy into magnetic energy and store it. It should be noted that although the structure of the inductor is similar to a transformer, it has only one winding. This article mainly introduces the inductive DC-DC booster principle, and this article is a basic nature, suitable for those who do not understand the characteristics of the inductor, but at the same time interested in the booster. Some of the theoretical knowledge in the text can be found online, so there is not much to say here.
To fully understand the inductive boosting principle, we must first know the characteristics of the inductor, including electromagnetic conversion and magnetic energy storage. These two points are very important because all the parameters we need are derived from these two characteristics.
First, let's first look at the following diagram:
As you all know, the picture above is an electromagnet, and one battery is energized for one coil. Some people may wonder why such a simple graph has a good analysis? We are going to use this simple diagram to analyze what happened at the moment of power-on and power-off.
The coil (hereafter called "inductance") has a characteristic - electromagnetic conversion, electricity can become magnetic, and magnetic can also be converted back to electricity. When energized, the electricity becomes magnetic and is stored in the inductor in the form of magnetism. The power-off transient will turn into electricity and be released from the inductor.
Now let's take a look at the picture below, what happened in the moment of power failure:
As I said before, the magnetic energy in the inductor will be re-energized when the inductor is de-energized. However, the problem is: the loop has been disconnected, the current is nowhere, and how can the magnet be converted into a current? Very simple, high voltage will appear at both ends of the inductor! How high is the voltage? Infinity high until it breaks through any medium that blocks the flow of current.
Here we understand the second characteristic of the inductor - the boost characteristic. When the loop is broken, the energy in the inductor will be converted back to electricity in the form of an infinitely high voltage, and the voltage can rise as much as possible, depending only on the dielectric breakdown voltage.
Now let's summarize the above:
Below is the positive pressure generator, you can constantly pull the switch, you can get an infinite high positive voltage from the input. How high the voltage rises depends on what you have at the other end of the diode to get the current to go. If nothing is connected, the current has nowhere to go, so the voltage will rise high enough to break the switch and the energy is dissipated as heat.
Hengstar designs and develops various industrial LCD displays for industrial control systems. There are multiple installation methods including: desktop installation, universal VESA mount, panel mount, flush mount and rack mount, making our monitors suitable for different types of industrial control and factory automation.
Industrial Monitors,Industrial Touch Monitor,Industrial Lcd Monitor,Industrial Touch Screen Monitor
Shenzhen Hengstar Technology Co., Ltd. , https://www.angeltondal.com