In an electric circuit, a power supply is a device that provides electrical energy, which converts other forms of energy into electrical energy; an appliance is a device that consumes electrical energy, which converts electrical energy into other forms of energy.
The power supply is the device that provides power to the electronic equipment, also known as the power supply, which provides all the components in the computer needs electrical energy. The size of the power supply power, current and voltage stability, will directly affect the computer's performance and service life.
Dry batteries, etc. are called power supplies. Through the transformer and rectifier, the alternating current into direct current device is called rectifier power supply. Electronic devices that provide signals are called signal sources. A crystal triode amplifies the signal sent from the front and transmits the amplified signal to the circuit behind it. The crystal transistor can also be regarded as a signal source for the circuit behind it. Rectifier power supply, signal source is sometimes called power supply.
Expanded:
Commonly used power sources are dry cell batteries (DC) and household 110V -220V AC power source.
Power supply products are widely used in industrial automation control, military equipment, scientific research equipment, industrial control equipment, computers and computers, communication equipment, power equipment, instrumentation, medical equipment, semiconductor refrigeration heating and other fields.
Power industry distribution: According to the latest news of the power supply network of talent, the latest statistics in 2011 show that the distribution of power supply companies are mainly distributed in South China and East China, the two regions, occupying the vast majority of the domestic power supply industry enterprises, especially in the Pearl River Delta region
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