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A linear power supply typically has a rectifier, filter, and regulator. The rectifier/filter provides pulsating DC that is regulated by the regulator. The trade off is that heat is generated by the regulator and there is often a transformer, making the power supply large and heavy.
A switching power supply still has a rectifier and filter, but it often runs directly off of the input AC, without a transformer, saving the weight of a transformer, but generating 160 to 320 volts DC, that must be regulated.
The trick in a switching power supply is that a high speed switch supplies power to an inductor. The input of the inductor is also grounded through a high speed, often schottky diode so that, when the switch is off, the inductor has a reverse EMF path to ground. The input of the switch is pulse width modulated, using a regulation scheme that is dependent on output voltage.
This works because an inductor resists a change in current, and if the output voltage is stable, it is assumed that the current is stable. The input voltage of the inductor is switching, but the output is fairly stable, requiring only a little bit of noise filtering.
The advantage of the switched power supply is that there are no linear drop devices between the filter and the output, i.e. the switch is always fully on or fully off, which means that power dissipation across the switch is much smaller than the equivalent linear regulator. The downside is complexity, but there are fully integrated IC's available today that will do nearly everything, requiring only a few external components.
With few, or maybe no, exceptions, most computer power supplies are of the switching regulator style, because you can build them very small, with very little weight, yet provide a lot of power in comparison to a linear power support.
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Difference between linear power supply and switch mode power supply?
a linear power supply the noise or ripple can be reduced to mv. However it is bulky heavy and inefficient A switching power supply it is easier to filter its output but the hi frequency noise and spikes are not that ease to get rid off. The weight and size can be greatly reduced and the efficiency greatly improved
Is transistor linear or non linear?
A transistor can function in both linear and non-linear modes. In the linear mode, it can amplify small signals with a linear relationship between input and output. In the non-linear mode, the transistor operates as a switch, turning on or off based on the input signal.
What is linear mime?
linear mime is when you draw somwthing the use it. e.g. i draw a tv then switch it on linear mime is when you draw somwthing the use it. e.g. i draw a tv then switch it on
What does switch mode power supply mean in computer applications?
A switch mode power supply is chosen for an application when its weight, efficiency, size, or wide input range tolerance make it preferable to linear power supplies. Initially the cost of semiconductors made switch mode supplies a premium cost alternative, but current production switch mode supplies are nearly always lower in cost.
How does a change over switch works?
When the supply from GEB is cut away, at that time the consumer is required to change over from the main supply to the private generator, so that he cut the supply from mains and switches to Generator with a change over switch.
What is differential pressure switch?
A pressure differential switch, is a switch that reacts to pressure difference of two points, usually your supply & return side. If the pressure between these points are high, it then "reacts" notifying of pressure problem on the system.
How to wire in a generator for backup power supply?
To wire in a generator for backup power supply, you will need to install a transfer switch to safely connect the generator to your electrical system. This switch will allow you to easily switch between utility power and generator power. Make sure to follow all safety guidelines and local building codes when installing the transfer switch.
How do you hook up a 3 way with power 2-12 light 2-12 and switch 3-12 all together in the second switch box?
There are lots of diagrams on web under 3-way switch. However, the general principle is as follows. There are three terminals on each switch. One is the common and the other two can be used interchangeably. You connect the others together one for one between two switches. Then one switch common goes to supply voltage (Whichever box has the supply) and the other switch common goes to the load. Connect the supply white wire to the white wire in the light. If supply and load are in different boxes you will have to use one of the wires to connect together the neutrals between boxes. If they are both in same box you have to use extra wire to extend the common to the box where the supply and load do not exist.
How to wire your house for a generator to ensure seamless power supply during outages?
To wire your house for a generator, you need to install a transfer switch to safely connect the generator to your electrical system. This switch will allow you to easily switch between utility power and generator power during outages, ensuring a seamless power supply to your home.
What different between fuse switch and switch fuse?
I believe that an isolator should only be used to isolate supplies that are not under load, while a switch fuse can isolate the supply that the fuse protects. A fused switch can isolate a three phase supply where a switch fuse might not in fault conditions.This is because three phase faults can occur with only one phase going down and larger currents occurring ?? ian malone.
Can the 12 GB PlayStation 3 console work on either 110V or 220V?
If there is a switch on the power supply that allows you to switch between the two voltages then the answer is yes. If there is no switch then you will need to use a travel voltage adapter to convert one voltage to the other.
What is the difference between iron clad double pole switch and double pole single throw switch?
Answer for USA, Canada and countries running a 60 Hz supply service.The difference between a double pole switch and a single pole switch is the use of the switch in the installation or equipment. A double pole switch is used when the voltage from two circuits has to be broken. An example of this is a 240 volt supply. A single pole switch is used where there is only a single supply voltage that has to be broken.
