Principle of High Frequency Switching Power Supply Module
Today I want to share with you the characteristics of high-frequency switching power supply module Principle of high-frequency switching power supply module, next I will be from the characteristics of high-frequency switching power supply module, the principle of high-frequency switching power supply module, high-frequency switching power supply module parameters, high-frequency switching power supply module dustproof measures, high-frequency switching power supply module of the direction of the development of the development of the direction of the module, which is a few aspects of this to introduce.
High-frequency switching power supply module is composed of a large number of resistors, capacitors, power electronic devices, etc. in accordance with certain circuitry, in the process of power conversion, always produce a certain amount of power loss, and power loss is usually emitted in the form of heat, so that the temperature of the power module rises. Excessive temperature rise on the life of the module has a great impact, the higher the operating temperature of the module, the lower the performance and reliability, the shorter the service life. Therefore, in addition to taking a high reliability of the circuit approach, but also must choose the appropriate heat dissipation method, effectively reduce the temperature rise of high-frequency switching power supply module to ensure that the service life. Currently used in electric power DC system of high-frequency switching power supply module, the main use of forced air-cooled and natural cooling two heat dissipation methods.
Frequency switching power supply module features
1, high efficiency: fully realize the full load range of zero-voltage zero-current switching, to ensure that the switching tube does not have any shutdown spike, the current is a pure sinusoidal wave, switching loss is very small; output rectifier voltage stress is very low, no reverse current.
2, small size: high efficiency of the converter, compared with the traditional pWM switching power supply topology program, the heat sink volume can be reduced by half.
3, high reliability: through the use of domestic leading process optimization design, perfect protection and alarm measures and the selection of high-quality and highly reliable imported devices, to achieve the perfect combination of low electromagnetic interference in this.
4, long life: due to the low temperature, can significantly delay the aging speed of components, thus improving the product life cycle;
High frequency
Principle of switching power supply module
High-frequency switching module adopts passive pFC technology and advanced pulse width modulation control technology (pWM), which makes the module efficiency further improved and harmonics reduced. The module adopts AC three-phase, three-wire 380VAC balanced input mode, there is no mid-wire current loss. Module AC input through the spike suppression circuit and EMI absorption circuit, the full-bridge rectifier filter circuit to rectify the three-phase AC voltage into a pulsating DC voltage, by the high-frequency pulse width modulation converter into a high-frequency square-wave voltage, and then by the output rectifier filter circuit, to get a stable output voltage and current, in the grid voltage and load changes feedback adjustment circuit to control the pulse width modulation circuit, to adjust the pulse width, to make the output voltage and current remain stable, to make the output voltage and current remain stable, to make the output voltage and current remain stable. When the grid voltage and load change, the feedback adjustment circuit controls the pulse width modulation circuit and adjusts the width of pulse width to keep the output voltage and current stable.
