The main functions of a power supply include the following:
- Convert AC to DC
- Provide DC voltage to the motherboard, adapters, and peripheral devices
- Provide cooling and facilitate air flow through the case
What is the purpose of a power supply?
Apr 30, 2020 · The main functions of a power supply include the following: Convert AC to DC. Provide DC voltage to the motherboard, adapters, and peripheral devices. Provide cooling and facilitate air flow through the case.
What is the primary function of the power supply?
Power supplies have essential functions found in all models with additional operations added depending on the device type. Power supplies may need to change voltage up or down, convert power to direct current, or regulate power for smoother outcoming voltage. These functions will help you choose which supply you need for your electrical needs.
What is power supply and its function?
May 24, 2013 · The main functions of a power supply include the following: Convert AC to DC Provide DC voltage to the motherboard, adapters, and peripheral devices Provide cooling and facilitate air flow through the case
What does a power supply do in a circuit?
A power supply is an electrical device that supplies electric power to an electrical load. The main purpose of a power supply is to convert electric current from a source to the correct voltage, current, and frequency to power the load. As a result, power supplies are sometimes referred to as electric power converters. Some power supplies are separate standalone pieces of …
What is the power supply on a computer?
The power supply’s fan circulates air throughout the computer. Most computer cases have air vents on one side, on both sides, or in the rear of the computer. The ATX-style power supply blows air inside the case instead of out the back. This is known as reverse flow cooling.
What are the two types of power supplies?
Power supplies in general come in two types: linear and switching. Computers use switching power supplies. The main functions of a power supply include the following: One purpose of a power supply is to convert AC to DC so the computer has proper power to run its components.
What is the first device in a power supply?
The first device in a power supply is the transformer . Its purpose is to step up or step down alternating source voltage to values needed for radio, TV, computer, or other electronic circuit use. Most transformers do not have any electrical connection between the secondary and primary windings. See Figure 3.
What voltage does a battery use?
This power comes out of an outlet at 115-volt ac, with a frequency of 60 Hertz. Different voltages are needed to operate some equipment.
Can you use a center tapped transformer for full wave rectification?
It is not always necessary to use a center-tapped transformer for full-wave rectification. Full secondary voltage can be rectified by using four diodes in a circuit called a bridge rectifier, Figure 13 and 14. Two circuits are shown so that the current can be observed in each half cycle.
What is an isolation transformer?
Isolation in a transformer. An isolation transformer is a transformer that has the specific purpose of isolating the primary circuit from the secondary circuit.
What happens when you connect an oscilloscope to a bridge rectifier?
Connecting an oscilloscope directly to a line-operated bridge rectifier will result in a dead ground when the oscilloscope ground is connected to the line voltage bridge. An isolation transformer with a 1 to 1 ratio must be used to prevent the ground lead on the scope from being connected to the hot conductor.
Can a half wave rectifier be filtered?
However, the half-wave rectifier uses only one half of the input ac wave. A better filtering action can be obtained by using two diodes. With this setup, both half cycles of the input wave can be used.
What is the function of a power supply?
The primary function of a power supply is to convert electric current from a source to the correct voltage, current, and frequency to power the load. As a result, power supplies are sometimes referred to as electric power converters. Some power supplies are separate standalone pieces of equipment, while others are built into ...
How to determine power supply?
The suitability of a particular power supply for an application is determined by various attributes of the power supply, which are typically listed in the power supply's specification. Commonly specified attributes for a power supply include: 1 Input voltage type (AC or DC) and range 2 Efficiency of power conversion 3 The amount of voltage and current it can supply to its load 4 How stable its output voltage or current is under varying line and load conditions 5 How long it can supply energy without refueling or recharging (applies to power supplies that employ portable energy sources) 6 Operating and storage temperature ranges
How does a switched mode power supply work?
In a switched-mode power supply (SMPS), the AC mains input is directly rectified and then filtered to obtain a DC voltage. The resulting DC voltage is then switched on and off at a high frequency by electronic switching circuitry, thus producing an AC current that will pass through a high-frequency transformer or inductor. Switching occurs at a very high frequency (typically 10 kHz — 1 MHz), thereby enabling the use of transformers and filter capacitors that are much smaller, lighter, and less expensive than those found in linear power supplies operating at mains frequency. After the inductor or transformer secondary, the high frequency AC is rectified and filtered to produce the DC output voltage. If the SMPS uses an adequately insulated high-frequency transformer, the output will be electrically isolated from the mains; this feature is often essential for safety.
Where does power come from?
The source power may come from the electric power grid, such as an electrical outlet, energy storage devices such as batteries or fuel cells, ...
What is an adjustable regulated power supply?
An adjustable regulated power supply is one that is both adjustable and regulated. An isolated power supply has a power output that is electrically independent of its power input; this is in contrast to other power supplies that share a common connection between power input and output.
How does an AC power supply work?
An AC power supply typically takes the voltage from a wall outlet ( mains supply) and uses a transformer to step up or step down the voltage to the desired voltage. Some filtering may take place as well. In some cases, the source voltage is the same as the output voltage; this is called an isolation transformer.
What is ripple in battery charging?
For example, in some battery charging applications, the power supply consists of just a transformer and a diode, with a simple resistor placed at the power supply output to limit the charging current.
What is the function of a power supply?
One of the important but forgotten functions of a power supply is to ensure a safe segregation of the low-voltage circuitry, which may be accessible to the user, from the high-voltage input, which must be inaccessible.
What is a power supply?
A power supply is a device that converts one voltage to another more convenient voltage while delivering power. Power supplies are designed from the output back to the input. Since they are designed after the amplification stages, it is tempting to think of them as an afterthought; indeed, some commercial products reflect this attitude. It is most important to realize that an amplifier is merely a modulator and controls the flow of energy from the power supply to the load. If the power supply is poor and has insufficient energy to meet the amplifier's peak demands, then the most beautifully designed amplifier will be junk. Valve amplifiers need a DC High Tension (HT) supply and one or more heater, or Low Tension (LT) supplies, which may be AC or DC. Often, the supplies for the pre-amplifier and power amplifier will be derived from the same power supply, which is frequently integral to the power amplifier, but this need not be so. The advent of Power Supply Unit Designer Version 2 freeware in 2003 has transformed the design of linear supplies, but an understanding of the underlying principles enables much faster convergence to an optimum design.
Why is a transformer important?
This is an important contribution to the electrical safety of the user.
What is reservoir capacitor?
A capacitor, called the reservoir capacitor is used as the reservoir of energy. This may be used on its own or as part of a circuit which provides further energy storage. Such a circuit is, in fact, a low-pass filter (see also Section 10.5 ). The low-pass filter reduces the variation of voltage.
What is the difference between linear and switching regulators?
1. Linear regulators exhibit efficiency of 20%–60%, whereas switching regulators have a much higher efficiency, typically 70%–95%. 2. Linear regulators can only be used as a step-down regulator, whereas switching regulators can be used in both step-up and step-down operations.
The Functions of Uninterrupted Power Supply (UPS)
Power failures and power surges are the unseen enemy in this day and age where data is of utmost importance. The threat of a loss of data could cause unthinkable damage to your business and equipment.
Mapletree
We provided the UPS System for Mapletree, Singapore which was mainly for CCTV Cameras and CCTV cameras were also provided by Keydence Systems Pte ltd.
GlaxoSmithKline (GSK)
We provided the supply of the UPS System together with CCTV Surveillance cameras for GSK based in Singapore, a British multinational pharmaceutical company headquartered in Brentford, London.
