CN-117220526-B - Ultra-wide input voltage power supply and control method thereof

CN117220526BCN 117220526 BCN117220526 BCN 117220526BCN-117220526-B

Abstract

The application provides an ultra-wide input voltage power supply and a control method thereof, the ultra-wide input voltage power supply comprises a power supply input end, a rectifying module, a PFC boost control module and a power supply output module which are connected in sequence, a partial pressure comparison control module is connected between the power input end and the PFC boost control module, and a dimming control module is connected between the partial pressure comparison control module and the power output module. The PFC boost control module selects the boosted voltage threshold value through the high and low levels output by the voltage division comparison control module, the dimming control module adjusts the voltage output from the voltage threshold value to the power output module, the voltage output by the power output module can meet the condition that the power grid voltage is input from 90V-520V, the power grid input condition is perfectly compatible with the application condition of two-phase power or three-phase power grid input, the full coverage in corresponding power is realized, more market requirements and applications are met, and the problem that the traditional power supply cannot directly supply power to industrial power products is solved.

Inventors

XIAO LIANG
ZHANG ANHUI
FENG WEI

Assignees

东莞市倍祺电子科技有限公司

Dates

Publication Date: 20260505
Application Date: 20231024

Claims (9)

1. The ultra-wide input voltage power supply is characterized by comprising a power supply input end, a rectifying module, a PFC boost control module, a partial pressure comparison control module, a dimming control module and a power supply output module, wherein the power supply input end is respectively connected with the input end of the rectifying module and the input end of the partial pressure comparison control module, the output end of the rectifying module is connected with the input end of the PFC boost control module, the output end of the PFC boost control module is respectively connected with the output end of the partial pressure comparison control module and the input end of the power supply output module, the output end of the partial pressure comparison control module is connected with the input end of the dimming control module, and the output end of the dimming control module is respectively connected with the power supply output module and the PFC boost control module; The PFC boost control module comprises a second voltage division sub-module, a PFC main control sub-module and a boost sub-module, wherein the input end of the second voltage division sub-module is connected with the output end of the voltage division comparison control module, the second voltage division sub-module is connected with the input end of the PFC main control sub-module, the output end of the PFC main control sub-module is connected with the boost sub-module, the second voltage division sub-module comprises a second switch tube and a voltage division resistor assembly, the third end of the second switch tube is connected with the output end of the voltage division comparison control module, the first end of the second switch tube is connected with the voltage division resistor assembly, the voltage division resistor assembly is further connected with the PFC main control sub-module, the second end of the second switch tube is grounded, the boost sub-module comprises a transformer, the input end of the transformer is connected with the PFC main control sub-module, the output end of the transformer is connected with the input end of the power output module, and the PFC main control sub-module is further connected with the dimming control module.
2. The ultra-wide input voltage power supply of claim 1, wherein the voltage division comparison control module comprises a first voltage division sub-module and a comparator, wherein an input end of the first voltage division sub-module is connected with the power input end, an output end of the first voltage division sub-module is connected with an input end of the comparator, an output end of the comparator is connected with the input end of the dimming control module and the PFC boost control module, the first voltage division sub-module comprises an eleventh resistor, a twelfth resistor, a sixteenth resistor and an eighteenth resistor which are connected in series, and a second capacitor connected in parallel with the eighteenth resistor, the eleventh resistor is connected with the power input end through a voltage stabilizing tube, a first end of the eighteenth resistor and a first end of the second capacitor are both connected with the input end of the comparator, a second end of the eighteenth resistor and a second end of the second capacitor are both grounded, an output end of the comparator is connected with the PFC boost control module through a fourteenth resistor, and an output end of the comparator is connected with the seventeenth resistor through the seventeenth resistor.
3. The ultra-wide input voltage power supply of claim 1, wherein the dimming control module comprises an optocoupler device comprising an optocoupler diode and an optocoupler switching tube.
4. The ultra-wide input voltage power supply according to claim 1, wherein the power output module comprises a rectifying and filtering output sub-module and an output power adjustable sub-module, wherein the input end of the rectifying and filtering output sub-module is connected with the output end of the PFC boost control module, the output end of the rectifying and filtering output sub-module is connected with the input end of the output power adjustable sub-module, the output power adjustable sub-module and the rectifying and filtering output sub-module are also connected with the dimming control module, the output power adjustable sub-module comprises a third switching tube, the third end of the third switching tube is connected with the dimming control module, the first end of the third switching tube is connected with a first power interface, and the second end of the third switching tube is connected with a second electrolytic capacitor in series; The rectifying and filtering output submodule comprises a thirty-third voltage stabilizing tube and a sixth electrolytic capacitor connected with the thirty-third voltage stabilizing tube in parallel; Or the rectifying and filtering output submodule comprises a thirty-third voltage stabilizing tube, a thirty-fourth voltage stabilizing tube, a filtering inductor and a sixth electrolytic capacitor, wherein the thirty-third voltage stabilizing tube is connected with the thirty-fourth voltage stabilizing tube in parallel and then connected with the first end of the filtering inductor, the second end of the filtering inductor is connected with the positive electrode of the sixth electrolytic capacitor, and the negative electrode of the sixth electrolytic capacitor is respectively connected with the anode of the thirty-fourth voltage stabilizing tube and the dimming control module.
5. The ultra-wide input voltage power supply of claim 1, comprising an a/D signal input module coupled to the dimming control module.
6. A control method of an ultra-wide input voltage power supply, applied to the ultra-wide input voltage power supply as claimed in claims 1-5, characterized in that the control method comprises the following steps: Acquiring power supply voltage data required by a user connected with the power supply output module and power supply voltage data input by the power supply input end; And carrying out voltage division, comparison, boosting and power regulation on the power supply voltage data by adopting a PFC voltage boosting control module, a voltage division comparison control module and a dimming control module according to the power supply voltage data so as to enable a power supply output module to output a power supply matched with the power supply voltage data.
7. The method of claim 6, wherein the step-up control module, the step-up comparison control module, and the dimming control module are configured to perform the step-up, comparison, step-up, and power regulation processing on the power supply voltage data according to the power supply voltage data, so that the power supply output module outputs a power supply matched with the power supply voltage data, comprising: If the power supply voltage data is smaller than a first voltage threshold, dividing the power supply voltage data by a first voltage dividing submodule of a voltage dividing comparison control module to obtain a first divided voltage; Inputting the first divided voltage into a comparator of the divided comparison control module for comparison, wherein the comparator outputs a low-level signal; controlling a second switching tube in the PFC boost control module to be cut off according to the low-level signal and boosting the power supply voltage data to the first voltage threshold value through a boosting submodule of the second switching tube; And regulating the first voltage threshold through a resistance value in a second voltage division sub-module of the PFC boost control module, a duty ratio of an optocoupler in the dimming control module or a duty ratio of a third switching tube in the power supply output module, so that the power supply output module outputs a power supply matched with the power supply voltage data.
8. The method of claim 7, wherein the step-up control module, the step-up comparison control module, and the dimming control module are configured to perform the step-up, comparison, step-up, and power regulation processing on the power supply voltage data according to the power supply voltage data, so that the power supply output module outputs a power supply matched with the power supply voltage data, comprising: If the power supply voltage data is larger than a first voltage threshold, dividing the power supply voltage data by a first voltage dividing submodule of a voltage dividing comparison control module to obtain a second divided voltage; inputting the second voltage division into a comparator of the voltage division comparison control module for comparison, wherein the comparator outputs a high-level signal; controlling a second switching tube in the PFC boost control module to be conducted according to the high-level signal, and dividing the power supply voltage data through a second voltage dividing sub-module of the PFC boost control module to obtain a third divided voltage; According to the fact that the third partial voltage is lower than an internal reference voltage set by a PFC main control sub-module in the PFC boost control module, boosting the power supply voltage data to a second voltage threshold through a boost sub-module of the PFC boost control module; the second voltage threshold value is adjusted through a resistance value in a second voltage division sub-module of the PFC boost control module, a duty ratio of an optical coupler device in the dimming control module or a duty ratio of a third switching tube in the power supply output module, so that the power supply output module outputs a power supply matched with the power supply voltage data; wherein the second voltage threshold is greater than the first voltage threshold, and the second voltage threshold is greater than 400V.
9. The method for controlling an ultra-wide input voltage power supply according to claim 8, wherein the step of adjusting the duty ratio of the optocoupler in the dimming control module to enable the power supply output module to output the power supply matched with the power supply voltage data comprises the steps of obtaining a regulating signal input by the A/D signal input module, and controlling the duty ratio of the optocoupler according to the regulating signal so as to enable the power supply output module to output 0-100% of the first voltage threshold or the second voltage threshold.

Description

Ultra-wide input voltage power supply and control method thereof Technical Field The application belongs to the technical field of voltage power supplies, and particularly relates to an ultra-wide input voltage power supply and a control method thereof. Background The general input voltage of the traditional power supply is 90-264 Vac or 120-347 Vac, the industrial electric product needs 480Vac, so that the traditional power supply cannot be used for the industrial electric product, the traditional power supply is adopted to provide power for the industrial electric product, the industrial electric product can be normally used only by reducing the voltage of a transformer or changing a power supply circuit, the power supply cost is increased, the universality and practicability of the product are reduced, meanwhile, the flyback topology has the advantages of low cost, fewer peripheral elements and suitability for wide voltage input, and is widely applied to the field with smaller output current in the conventional power supply, but is not applicable to the aspect of low voltage and large current. Disclosure of Invention An embodiment of the application provides an ultra-wide input voltage power supply and a control method thereof, which are used for solving the problem that the traditional power supply cannot directly supply power to industrial electric products. In a first aspect, an embodiment of the present application provides an ultra-wide input voltage power supply, including a power input end, a rectifying module, a PFC boost control module, a voltage division comparison control module, a dimming control module, and a power output module, where the power input end is connected to the input end of the rectifying module and the input end of the voltage division comparison control module, the output end of the rectifying module is connected to the input end of the PFC boost control module, the output end of the PFC boost control module is connected to the output end of the voltage division comparison control module and the input end of the power output module, the output end of the voltage division comparison control module is connected to the input end of the dimming control module, and the output end of the dimming control module is connected to the power output module and the PFC boost control module. Optionally, the voltage division comparison control module comprises a first voltage division sub-module and a comparator, wherein the input end of the first voltage division sub-module is connected with the power input end, the output end of the first voltage division sub-module is connected with the input end of the comparator, the output end of the comparator is connected with the input end of the dimming control module and the PFC boost control module, the first voltage division sub-module comprises an eleventh resistor, a twelfth resistor, a sixteenth resistor and an eighteenth resistor which are connected in series and a second capacitor connected in parallel with the eighteenth resistor, the eleventh resistor is connected with the power input end through a voltage stabilizing tube, the first end of the eighteenth resistor and the first end of the second capacitor are both connected with the input end of the comparator, the second end of the eighteenth resistor and the second end of the second capacitor are both grounded, the output end of the comparator is connected with the boost control module through a fourteenth resistor, and the output end of the comparator is connected with the input end of the dimming control module through a seventeenth resistor. Optionally, the PFC boost control module includes a second voltage division sub-module, a PFC main control sub-module and a boost sub-module, where an input end of the second voltage division sub-module is connected with an output end of the voltage division comparison control module, the second voltage division sub-module is connected with an input end of the PFC main control sub-module, an output end of the PFC main control sub-module is connected with the boost sub-module, the second voltage division sub-module includes a second switching tube and a voltage division resistor assembly, a third end of the second switching tube is connected with an output end of the voltage division comparison control module, a first end of the second switching tube is connected with the voltage division resistor assembly, the voltage division resistor assembly is further connected with the PFC main control sub-module, a second end of the second switching tube is connected with the boost sub-module, an input end of the transformer is connected with the PFC main control sub-module, an output end of the transformer is connected with an input end of the power output module, and the PFC main control sub-module is further connected with the dimming control module. Optionally, the dimming control module includes an optocoupler device, and the optocoupler device include