Computer power supply
Computer power supply is one of the key components for the normal operation of the computer. Its function is to provide stable power support for various components of the computer. However, many people do not know the function and working principle of pc power supply when using the computer. This article will introduce the pc power supplies in detail from the basic concepts, functions, principles, maintenance and other aspects.
Concept
Power supply for pc is a power supply that can convert ac power into dc power. It is one of the most important components in the computer. It can provide stable power support for various components of the computer and ensure the normal operation of the computer.
Function
The main function of the atx12v power supplies is to convert ac power into dc power and provide stable power support for various components of the computer. It can convert high-voltage ac power into low-voltage dc power to meet the operating requirements of various components of the computer.
Working principle
The pc power supply is a four-way switching voltage-stabilized power supply without an industrial frequency transformer. Its working principle is: After the 220v ac power input, it is first filtered by a low-pass filter and rectified by a bridge rectifier to become a 300v dc peak high voltage. The dc high voltage is sent to the pulse width modulator and the conversion oscillator (power conversion circuit) to become a 300v rectangular wave or sine wave, and then it is transformed by high-frequency transformation and rectification and filtering to output +12v, +5v dc stable voltage for system use.
The power supply adopts the feedback voltage stabilization working principle of adjusting the duty ratio of the 300v rectangular wave to adjust the dc output value, and adopts direct rectification, high-frequency conversion and pulse width modulation technology, thus omitting the bulky transformer, and has the characteristics of small size, light weight, high efficiency and over-current and over-voltage protection. In addition, the power supply component also generates a power signal - power good signal, which indicates that the power supply status is normal, and is provided to the host to generate a hardware reset reset signal to enable the system to start normally.
The working principle of the pc power supply is mainly divided into four steps:
Input: The power supply receives 220v ac.
Rectification: The power supply converts ac into pulsating dc through a rectifier bridge. Filtering: The power supply filters the pulsating dc into smooth dc through components such as capacitors and inductors.voltage stabilization: The power supply stabilizes the smooth dc to a voltage value suitable for each component of the computer through a voltage stabilization chip.
Maintenance
In order to ensure the performance and life of the quality pc power supply , we need to do the following maintenance:
Avoid excessive load: Do not let the power supply run at high load for a long time, otherwise it will cause the power supply to heat up, age or even burn out.regular cleaning: Regularly clean the dust and debris inside the power supply to avoid affecting heat dissipation and circuit stability.
Avoid electromagnetic interference: Avoid the influence of electromagnetic interference on the power supply, such as staying away from electrical appliances such as induction cookers and microwave ovens. In short, the pc power supplies
Is one of the key components for the normal operation of the computer. Its function is to provide stable power support for various components of the computer. Understanding the function and working principle of the computer power supply and doing a good job of maintenance can ensure the normal operation of the computer and extend the service life of the power supply.
