Generators can convert mechanical energy into electrical energy, and dry batteries can convert chemical energy into electrical energy. Generators and batteries themselves are not charged, their poles have positive and negative charges respectively, and the positive and negative charges generate voltage (current is formed by the directional movement of charges under the action of voltage). It is only necessary to add voltage. When the two poles of the battery are connected to the conductor, the positive and negative charges are released in order to generate current. Dry batteries, etc. are called power sources. A device that converts alternating current into direct current through a transformer and a rectifier is called a rectifier power supply. An electronic device that provides a signal is called a signal source. The transistor can amplify the signal sent in front, and transmit the amplified signal to the circuit behind. For the following circuits, the transistor can also be regarded as a signal source. Rectified power supplies and signal sources are sometimes called power supplies.
A power supply is a device that provides power to electronic equipment, also known as a power supply, which provides the electrical energy required by all components in a computer. The size of the power supply, whether the current and voltage are stable, will directly affect the working performance and service life of the computer.
The computer power supply is a closed independent component installed in the main box. Its function is to change the AC power to 5V, -5V, 12V, -12V, 3.3V and other stable DC power through a switching power transformer to supply the main box. Internal system version, floppy disk, hard disk drive and various adapter expansion cards and other system components are used. In layman's terms, when one power supply fails, another backup power supply replaces its power supply. Hardware availability can be enhanced by providing battery backup for nodes and disks. An HP-supported uninterruptible power supply (UPS), such as HP PowerTrust, guards against momentary power outages. The disks are connected to the power supply circuit in such a way that the mirror copies are connected to different power sources. The root disk and its corresponding node should be powered by the same power circuit. In particular, the cluster lock disk (used as an arbiter when reorganizing the cluster) should have redundant power, or it can be powered by a power source other than the nodes in the cluster. An HP representative can provide detailed information on the power, disk, and LAN hardware layout of the cluster. Many disk arrays and other rack-mounted systems contain multiple power inputs, and they should be deployed as different power inputs on the device connected to separate circuit devices with two or three power inputs so that, in general, as long as a failure occurs The system can continue to operate normally without more than one circuit. Therefore, if all hardware in the cluster has 2 or 3 power inputs, at least three independent circuits are required to ensure that there is no single point of failure in the circuit design of the cluster. Generators can convert mechanical energy into electrical energy, and dry batteries can convert chemical energy into electrical energy. Generators and batteries themselves are not charged, their poles have positive and negative charges respectively, and the positive and negative charges generate voltage (current is formed by the directional movement of charges under the action of voltage). It is only necessary to add voltage. When the two poles of the battery are connected to the conductor, the positive and negative charges are released in order to generate current. Dry batteries, etc. are called power sources. A device that converts alternating current into direct current through a transformer and a rectifier is called a rectifier power supply. An electronic device that provides a signal is called a signal source. The transistor can amplify the signal sent in front, and transmit the amplified signal to the circuit behind. For the following circuits, the transistor can also be regarded as a signal source. Rectified power supplies and signal sources are sometimes called power supplies.
The working process of the switching power supply is quite easy to understand. In the linear power supply, the power transistor is operated in the linear mode. Unlike the linear power supply, the PWM switching power supply makes the power transistor work in the on and off states. In the state, the volt-ampere product applied to the power transistor is very small (when it is turned on, the voltage is low and the current is large; when it is turned off, the voltage is high and the current is small) / The volt-ampere product on the power device is the power semiconductor losses on the device.
Compared with the linear power supply, the more effective working process of the PWM switching power supply is realized by "chopping", that is, the input DC voltage is chopped into a pulse voltage whose amplitude is equal to the input voltage amplitude. The duty cycle of the pulse is adjusted by the controller of the switching power supply. Once the input voltage is chopped into an AC square wave, its amplitude can be stepped up or down through a transformer. The output voltage value can be increased by increasing the number of secondary windings of the transformer. Finally, these AC waveforms are rectified and filtered to obtain a DC output voltage.
The main purpose of the controller is to keep the output voltage stable, and its working process is very similar to the linear form of the controller. That is to say, the functional blocks of the controller, the voltage reference and the error amplifier, can be designed to be the same as those of the linear regulator. The difference between them is that the output of the error amplifier (error voltage) goes through a voltage/pulse width conversion unit before driving the power tube. There are two main working modes of switching power supply: forward conversion and boost conversion. Although the layout of their various parts differs little, the working process varies greatly, and each has its own advantages in specific applications
