Alternating-current brushless voltage regulating and stabilizing digital power-supply unit

Abstract

The invention discloses an alternating-current brushless voltage regulating and stabilizing digital power-supply unit, belonging to the technical field of power electron, and comprising an alternating-current power supply, a power conversion main circuit module, a driving circuit module, a control signal generation module, a detect module and an auxiliary power module. The alternating-current power supply is respectively connected with the power conversion main circuit module and the auxiliary power module, the power conversion main circuit module is connected with the driving circuit module that is connected with the control signal generation module, the detect module is connected with the control signal generation module and the power conversion main circuit module, and the auxiliary power module is respectively connected with the driving circuit module, the control signal generation module and the detect module. The alternating-current brushless voltage regulating and stabilizing digital power-supply unit directly generates four paths of PWM control signals, has the advantages of simple equipment, low cost and easy implementation, has a function of over-current protection, and can keep the output voltage stable when the input voltage fluctuates.

Description

technical field [0001] The invention relates to a device in the technical field of power electronics, in particular to an AC brushless voltage regulating and stabilizing digital power supply device. Background technique [0002] AC voltage regulating and stabilizing devices are widely used in many fields of industrial production. At present, AC voltage regulating and stabilizing devices can be divided into two categories. The first type is a brush contact voltage regulating device, but when the device is in high current, the voltage drop of the brush is large and the calorific value is high. When running at high speed, the brush generates electric sparks and electromagnetic interference; The reason is that the brushed voltage regulator is not suitable for operating in dusty, muddy, and humid environments; due to the wear and tear of the carbon brush after long-term work, the service life of the brushed voltage regulator is greatly limited, and the maintenance cost of the sys...

AI Technical Summary

Problems solved by technology

The first type is a brush contact voltage regulating device, but when the device is in high current, the voltage drop of the brush is large and the calorific value is high. When running at high speed, the brush generates electric sparks and electromagnetic interference; The reason is that the brushed voltage regulator is not suitable for operating in dusty, muddy, and humid environments; due to the wear and tear of the carbon brush after long-term work, the service life of the brushed voltage regulator is greatly limited, and the maintenance cost of the system higher

The second category is the non-contact AC voltage regulating device based on power electronic technology. This type of device uses power electronic devices to realize the non-contact regulation of AC voltage, which overcomes the shortcomings of brushed voltage regulating devices, such as large loss, large interference, and easy wear and tear.

[0003] After searching the existing literature, it is found that the Chinese patent publication number is CN101364117, and the patent name is: non-complementary chopping control type intelligent AC voltage regulation method and device. The application adopts the AC chopping control technology, but the PWM (pulse Width modulation) signal division and generation scheme design is more complex and costly; the reliability of the device is poor, when the input voltage fluctuates or the load is switched, the output voltage will be unstable, and it is suitable for some sensitive devices that require high input voltage stability load, unstable output voltage may cause malfunction or even equipment damage

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