0
Transformers change the numbers of volts, watts, and amperes of the electrical current, from those in the power source to those needed for the mechanism.
Generally, transformers are used to change the input voltage to a desired value of output voltage. Typically, transformers step up (increase) the voltage, or step down (decrease) the voltage. There are many applications and uses for transformers - most of these embed the transformer in another device, so you do not see (or even know about) the transformer.
A computer power supply, for example, has a transformer embedded in it that converts the incoming 120 volts into both 12 and 5 volts. As another example, when travelling from North America to Europe, travelers often take with them an adapter that includes a step-down transformer that converts the European 220 volts into the 120 volts that the North American appliances require. Note that the transformer cannot change the frequency of alternating current, and so some 60 Hz North American appliances will not work properly in Europe, even with a proper step-down transformer, because European power is distributed at 50 Hz. Similarly, some 50 Hz European appliances will not work properly with 60 Hz North America power, even with a proper step-up transformer.
Transformers are also included in adapters for electronics, such as for a cell phone charger. A transformer inside the adapter reduces the incoming 120 volts into a lower voltage (sometimes, 3, 5, 6, 9, 12 or some other value of volts) that the cell phone can accommodate. Such electronic adapters (and the computer power supply, noted in the example above) often include a rectifier that also converts the alternating current (AC) into direct current (DC), which reduces peak-to-peak voltage without affecting RMS (root mean square) voltage.
Most transformers have fixed ratios, meaning the output voltage is always a constant fraction of the input voltage. The output of these fixed ratio transformers will fluctuate in proportion to the fluctuation of the input voltage. Some transformers are variable ratio, meaning you can adjust (either manually or automatically) the ratio of output to input voltages. Automatic variable ratio transformers are typically used to output a constant voltage, regardless of how much the input voltage fluctuates.
Also to destroy the decepticons.
What else can I help you with?
What difference's between potential transformer and voltage transformer?
Both are same. This is an instrument transformer used for metering & protections.
What is the name of the transformer that reduces the voltage?
a step down transformer is used to lower the voltage from the powerlines into your home. a common slang term for this type of transformer is a pole pig.
A transformer is a device used to increase or decrease dc voltage?
The answer below this is not correct, a transformer can only be used on AC not DC. So the statement, "A transformer is a device used to increase or decrease DC voltage" is false The above comment relates to an entry which was obviously deleted. However, the above comment is also false. The ignition coil in of a petrol engine is a transformer, a pulse transformer. It's d.c. which passes through the primary, not a.c. <<>> A: this is a passive component as opposed to a device that is active answer is yes it does that but more importantly it isolates and match in/out impedance's
How do you reduce 12 volts to 3.7 volts?
If the voltage is AC a transformer can be used.
How a transformer can be used as impedance matching?
If the line impedance is Z0 and the load is ZL then connect the load using a transformer with N turns ration. N=sqrt(Z0/ZL)
Why transformer is used?
A transformer used to step up or down the value of voltage.
What is the transformer used in ups?
simple step up transformer
Oil filled transformer is usually used indoor or outdoor?
An oil filled transformer is usually used outdoors and a dry core transformer is usually used indoors.
What is the difference between power transformer and instrument transformer?
A power transformer is used to provide power (to your home, for example), an instrument transformer is used to measure voltage or current (for metering, for example).
What is the difference between control transformer and Potential transformer?
Control transformer used only for control supply 110,220, 24,12V AC. But Potential transformer used voltage measurement purpose.
Where is the use of earth transformer?
It is used in where the transformer are connected in star delta.
How is a transformer utilized?
Transformer is used for stepping up or down the voltage.
What difference's between potential transformer and voltage transformer?
Both are same. This is an instrument transformer used for metering & protections.
When is a step up transformer used in relationship as to when a step down transformer is used?
If the voltage needs to be increased from a lower voltage to a higher voltage a step up transformer is used. If the voltage needs to be lowered from a higher voltage to a lower voltage a step down transformer is used.
What is linear transformer?
The Linear Variable Differential Transformer is a type of electrical transformer used for measuring linear displacement. A counterpart to this device that is used for measuring rotary displacement is called a Rotary Variable Differential Transformer.
Difference between potential transformer and current trasnformer?
The difference between current transformer and potential transformer is that the secondary of a current transformer can not be open circuited while under service whereas that of the potential transformer an be open circuited without any damage to the transformer.
Can you use transformer with your 110 aircon?
A transformer can be used to change the voltage to an appliance. The voltage rating of the transformer should be right for the voltages used, and the current rating of the transformer should not be less than the current drawn by the equipment.
