Power supply عرض1 week ago - ملابس وموضة - تبوك - 22 الآراء
What is AC and DC Power Supply?
A power supply is an electrical device that converts the electric current that comes in from a power source, such as the power mains, to the voltage and current values necessary for powering a load, such as a motor or electronic device.The objective of a power supply is to power the load with the proper voltage and current. The current must be supplied in a controlled manner — and with an accurate voltage — to a wide range of loads, sometimes simultaneously, all without letting changes in the input voltage or in other connected devices affect the output.A power supply can be external, often seen in devices such as laptops and phone chargers, or internal, such as in larger devices such as desktop computers. A power supply can either be regulated or unregulated. In a regulated power supply, the changes in the input voltage do not affect the output. On the other hand, in an unregulated power supply, the output depends on any changes in the input. The one thing all power supplies have in common is that they take electric power from the source at the input, transform it in some way, and deliver it to the load at the output. The power at the input and output can be either alternating current (AC) or direct current (DC):
An LED driver is an electrical device that regulates power to an LED or a string of LEDs. It is a crucial piece to an LED circuit and to operate without one will result in system failure. Using one is very important in preventing damage to your LEDs as the forward voltage (Vf) of a high-power LED changes with temperature. Forward Voltage is the amount of volts the light emitting diode requires to conduct electricity and light up. As temperature increases, the forward voltage of the LED decreases, causing the LED to draw more current. The LED will continue to get hotter and draw more current until the LED burns itself out, this is also known as Thermal Runaway. The LED driver is a self-contained power supply which has outputs that are matched to the electrical characteristics of the LED(s). This helps avoid thermal runaway as the constant current LED driver compensates for the changes in the forward voltage while delivering a constant current to the LED. here are some things you should consider about it:
In order to transfer control data to all building management components (or smart home devices/functions), a system is required that avoids the problem of having isolated devices speaking 'different languages'. KNX devices can manage lighting, blinds and shutters, HVAC, security systems, energy management, audio video, white goods, displays, remote control, etc. KNX is also the world’s only open standard for home and building control and is compliant to EN 50090, EN 13321-1 and ISO/ IEC 14543, and has been submitted for Australian standards approval.
A solar inverter is a device that converts the DC power from solar panels into AC electricity. It usually has multiple DC inputs that allow the connection of solar PV strings into the inverter’s DC side. The AC side of an on-grid type inverter (a.k.a. grid-tie solar inverter) directly connects to the local utility grid through the electrical mains of a building. It uses the electrical utility parameters such as voltage and frequency as a grid reference. This enables the inverter to synchronize to the grid and pump power to the connected load. A string inverter is simply an inverter that requires a higher level of DC input voltage to operate. It is designed to take 5 to 22 solar panels, connected in series, as its input. Additionally, to learn how to operate and and to switch off an inverter will also be essential. There are a lot of factors to be considered when choosing the best inverter. Although the end-users’ needs might vary, few aspects are commonly desired for the grid-tie inverters to have. Here is a list of important features for an inverter to be considered in the top tier:
Let’s first begin with what an inverter is. An inverter performs the direct current power generated by a solar energy panel to alternating current. It is AC power that our homes and offices receive from an electrical grid. A bidirectional inverter, in a DC-distribution system, is a device that is used to regulate and monitor the flow of power between a DC bus and an AC grid and to restrict the voltage expanse at the former to only a certain permissible range of voltages. In other words, a bi-directional inverter is the one that not only performs the DC to AC conversion, but also performs the conversion of AC power to DC. The major advantage of using a bidirectional inverter is that their use provides users—typically homeowners and business owners—with additional flexibility in terms of the ability to decide when to buy power from an electrical grid and when to sell so as to make the maximum profit based on the price of electricity at a particular point in time.