CN218387298U - AC/DC power module power supply system - Google Patents
AC/DC power module power supply system Download PDFInfo
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- CN218387298U CN218387298U CN202222025467.4U CN202222025467U CN218387298U CN 218387298 U CN218387298 U CN 218387298U CN 202222025467 U CN202222025467 U CN 202222025467U CN 218387298 U CN218387298 U CN 218387298U
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Abstract
The application discloses AC/DC power module power supply system, it includes an at least module control panel, and each module control panel includes: a voltage conversion module comprising at least two AC/DC modules connected in parallel; the current sampling circuit is used for sampling the output current of each AC/DC module and converting the output current into a corresponding first voltage signal; the voltage sampling circuit is used for sampling the output voltage of the voltage conversion module and generating a second voltage signal; the current-sharing compensation circuit is used for generating differential voltage signals based on the first voltage signals and generating first reference voltage signals after processing the differential voltage signals; and the voltage compensation circuit is used for outputting a control voltage signal based on the second voltage signal or based on the second voltage signal and the first reference voltage signal and transmitting the control voltage signal to the main control unit in each AC/DC module, and the main control unit adjusts the direct-current output voltage of the voltage conversion module according to the control voltage signal. The utility model discloses power supply system has longe-lived, steady voltage, the advantage of flow equalizing.
Description
Technical Field
The application relates to the field of power supplies, in particular to an AC/DC power supply module power supply system for a bird-detecting vehicle.
Background
The general AC/DC switching power supply mainly comprises an input link, a power conversion circuit and a control drive circuit. As shown in fig. 1, the input link selects more than one device such as a fuse or a voltage dependent resistor and places the selected device at the input end, so as to protect the product or the subsequent circuit device to a certain extent; the power conversion circuit adopts an AC-DC converter and generally has circuit topologies of half-wave rectification, full-wave rectification, bridge rectification and the like; the main control mode for controlling the driving circuit part is PWM, the output of the error amplifier is compared with a given reference value, and the required output voltage is obtained through pulse width modulation. An RC filter circuit is usually designed at the output end of the power supply to process the output voltage.
However, current sharing processing is not performed in the existing AC/DC switching power supply products, the protection mechanism of the power supply products is incomplete, and the service life of the equipment is seriously influenced. In addition, the existing AC/DC switching power supply has the disadvantages of relatively large output ripple, single output port, unclear status indication, and the like.
SUMMERY OF THE UTILITY MODEL
In order to overcome the not enough of existence among the prior art, the utility model provides a AC/DC power module power supply system, it includes an at least module control panel, and each module control panel includes:
a voltage conversion module comprising at least two AC/DC modules connected in parallel, each AC/DC module for converting an alternating input voltage to a direct output voltage;
the current sampling circuit is used for sampling the output current of each AC/DC module and converting the output current into a corresponding first voltage signal;
the voltage sampling circuit is used for sampling the output voltage of the voltage conversion module and generating a second voltage signal;
the current-sharing compensation circuit is used for generating differential voltage signals based on the first voltage signals and generating first reference voltage signals after processing the differential voltage signals;
and the voltage compensation circuit is used for outputting a control voltage signal based on the second voltage signal or based on the second voltage signal and the first reference voltage signal and transmitting the control voltage signal to the main control unit in each AC/DC module, and the main control unit adjusts the direct-current output voltage of the voltage conversion module according to the control voltage signal.
According to the utility model discloses, compensate and carry out voltage compensation to voltage conversion module through a plurality of AC/DC modules to voltage conversion module, realize voltage conversion module's steady voltage, flow equalize, perfect power product's protection mechanism, the life of extension power.
Other features and advantages of the present invention will become apparent from the following detailed description of the embodiments of the invention, when read in conjunction with the accompanying drawings.
Drawings
FIG. 1 is a schematic diagram of a circuit block of a prior art AC/DC switching power supply;
fig. 2 is a schematic diagram illustrating an embodiment of an AC/DC power supply system according to the present invention;
FIG. 3 is a block diagram of a current sharing compensation circuit and a voltage compensation circuit in the power supply system of the AC/DC power module shown in FIG. 2;
fig. 4 is a schematic diagram of a working flow of the power supply system of the AC/DC power module shown in fig. 2.
For the sake of clarity, the figures are schematic and simplified drawings, which only show details which are necessary for understanding the invention and other details are omitted.
Detailed Description
Embodiments and examples of the present invention will be described in detail below with reference to the accompanying drawings.
The scope of applicability of the present invention will become apparent from the detailed description given hereinafter. It should be understood, however, that the detailed description and the specific examples, while indicating preferred embodiments of the invention, are given by way of illustration only.
Fig. 2 is a schematic diagram illustrating the configuration of an embodiment of the AC/DC power supply system according to the present invention. The power supply system of the AC/DC power supply module comprises a back plugboard, three module control boards (a module one control board, a module two control board and a module three control board) and a front panel.
The back plugboard is used as a bridge between the module control board and the input and output ends. After an external alternating current power supply such as a three-phase four-wire system is connected with an input connector on the back plug board through a protective tube, the protective tube can provide input electricity for a module in the whole power supply case, protect the internal devices of the case and prevent overload and overcurrent from damaging the important devices in the case. When the module is started, the voltage is output through the back plug board. The back insert plate is provided with three output connectors, here 1.7KW, 2.3KW and 7.4KW.
Each module control panel comprises a voltage conversion module, a current sampling circuit, a voltage sampling circuit, a current-sharing compensation circuit, a voltage compensation circuit, an anti-reverse circuit and an output filter.
The voltage conversion module comprises at least two parallel connected AC/DC modules, each for converting an alternating input voltage to a respective direct output voltage. In the embodiment of fig. 2, the voltage conversion module of the module one control board is a 1.7KW, 52V conversion module comprising two AC/DC modules of UHP-1000, 1KW model; the voltage conversion module of the module II control board is a 2.3KW and 52V conversion module, and comprises three AC/DC modules with UHP-1000 types and 1kW types; the voltage conversion module of the module three-control board is a 7.4KW and 52V conversion module, and comprises three AC/DC modules with models of UHP-2500 and 2.5 kW; so that each module outputs different powers, i.e. 1.7KW, 2.3KW and 7.4KW, respectively.
The current sampling circuit is used for sampling the output current of each AC/DC module and converting the output current into a corresponding first voltage signal. The current sampling circuit may take the form of a sampling resistor.
The voltage sampling circuit is used for sampling the output voltage of the voltage conversion module and generating a second voltage signal.
And the current-sharing compensation circuit is used for generating differential voltage signals based on the first voltage signals and generating first reference voltage signals after processing the differential voltage signals.
And the voltage compensation circuit is used for outputting a control voltage signal based on the second voltage signal or based on the second voltage signal and the first reference voltage signal and transmitting the control voltage signal to the main control unit in each AC/DC module, and the main control unit adjusts the direct current output voltage of the voltage conversion module according to the control voltage signal.
The anti-reverse circuit is arranged between the output of the voltage conversion module and the corresponding output connector and is used for preventing the AC/DC module from being burnt by current backflow. The anti-reverse circuit generally utilizes the characteristic of unidirectional conduction of the diode to realize anti-reverse protection, and has very high reliability and simplicity.
The passive filter circuit is arranged between the anti-reverse circuit and the output connector and used for filtering interference and noise and reducing output ripples. The passive filter circuit can be a passive filter which meets the conditions of size, current output capacity and the like.
In an embodiment, a block schematic diagram of the current share compensation circuit and the voltage compensation circuit is shown in fig. 3.
The voltage compensation circuit comprises an isolation optocoupler, a PI (proportional integral) regulator and a comparator. And the isolation optocoupler is used for resisting interference and outputs a third voltage signal VS based on a second voltage signal generated by the voltage sampling circuit. The PI regulator is configured to compare the third voltage signal VS with a voltage reference value and output a second reference voltage signal VCREF. The comparator is used for outputting a control voltage signal based on the second reference voltage signal VCREF or outputting the control voltage signal based on the first reference voltage signal VADJO and the second reference voltage signal VCREF.
The current-sharing compensation circuit comprises a first integrated operational amplifier U 1 A. Isolation optocoupler and second integrated operational amplifier U 1 B, and a current equalizing chip. The model of the current sharing chip is UCC39002. The first integrated operational amplifier is used for processing the first voltage signal sampled by the sampling resistor and then generating a corresponding fourth voltage signal, and has the effect of reducing the interference of an upper-level signal to a lower-level signal. And the isolation optocoupler is used for resisting interference and outputs a fifth voltage signal based on the fourth voltage signal. The second integrated operational amplifier is used for outputting a differential voltage signal based on the fifth voltage signal, the integrated operational amplifier comprises more than two independent operational amplifiers, peripheral circuits are respectively designed for the integrated operational amplifier, each independent operational amplifier outputs one voltage signal, and the output voltage signals are approximately regarded as the voltage of one differential signal and are transmitted to a rear-stage circuit because the output voltage signals are inconsistent. The current sharing chip is used for processing the differential voltage signal and then generating a first reference voltage signal VADKO.
When the output current is zero (namely the output end has no load), only voltage closed-loop control (namely a voltage compensation circuit) is acted, the collected voltage signal is transmitted to the primary side of the isolation optocoupler through terminal voltage sampling, due to the characteristics of an isolation optocoupler device, a voltage signal VS of 1.
When the output current is not zero (namely, the output end has a load), the current loop control (namely, the current sharing compensation circuit) is added at the moment. The current sampling resistor converts a current signal into a voltage signal, the converted voltage signal is processed by the first integrated operational amplifier, the isolation optocoupler and the second integrated operational amplifier to output a differential voltage signal to the current equalizing chip, the current equalizing chip processes the differential signal and outputs a first reference voltage signal VADKO to the comparator, the comparator processes the voltage signals output by the voltage ring and the current ring and outputs a control voltage signal PV, and the signal is finally transmitted to the main control unit inside the integrated module (UHP-1000/UHP-2500) to adjust the output voltage (current), so that the current equalizing and voltage stabilizing effects are realized.
In an embodiment, three rocker switches are disposed on the front panel, each rocker switch being configured to control activation of a corresponding voltage conversion module. Still be provided with three pilot lamp on the front panel, each pilot lamp is connected to the output of corresponding voltage conversion module and instructs the state of corresponding module control panel, if the pilot lamp extinguishes then explains the trouble in the module.
In an embodiment, the power supply further includes at least one temperature control device, each temperature control device is connected between the output of the corresponding voltage conversion module and the corresponding heat dissipation device, and the temperature control device is turned on when sensing that the temperature exceeds a set value, so that the corresponding heat dissipation device operates, and the temperature of the module is controlled.
FIG. 4 illustrates a schematic flow chart of the operation of the AC/DC power module power supply system of FIG. 2. When an alternating current input power supply is electrified, a rocker switch is used for controlling the starting of a voltage conversion module (an AC-DC module), when the AC-DC module is started, one path of the output end of the module is connected with a cooling fan, and the other path of the output end of the module enters a current-sharing control panel; meanwhile, an auxiliary power supply 12VAUX in the AC-DC module supplies power to the current-sharing control circuit; the current sampling circuit on the current-sharing control board feeds back the current sampling circuit to the AC/DC module, and the voltage at the output end is regulated through the regulating circuit inside the current-sharing control board; and finally, outputting through an anti-reflection circuit, a passive filter and the like.
The utility model discloses a AC/DC power module power supply system compares prior art and has following improvement and optimization:
(1) The voltage stabilization and current equalization of the voltage conversion module are realized by performing current equalization compensation on a plurality of AC/DC modules of the voltage conversion module and performing voltage compensation on the voltage conversion module, the protection mechanism of a power supply product is perfected, and the service life of the power supply is prolonged;
(2) To the single problem of delivery outlet, in hardware design, the utility model discloses AC/DC power module power supply system possesses a plurality of output connector to connect more consumer, the demand of more occasions also can be satisfied in this design. In addition, the output is subjected to filtering design on hardware, so that ripple voltage during output is greatly reduced, and the stability of output voltage and power is further guaranteed;
(3) Usually, the power supply product only has one status indicator lamp and cannot well indicate the working status of each part. To this case, the utility model discloses AC/DC power module power supply system has carried out further optimization on the basis of current product, has designed the operating condition indicator circuit of three routes output respectively, can observe the output condition of three routes more clearly and clearly. And the output loops of the three outputs are electrically isolated from each other. If one power supply module in the three modules has a problem, the power supply module can be timely disassembled and replaced, and the power supply module is more convenient and faster to use;
(4) For the output end of the power supply, only simple RC filtering processing is usually performed, for the power supply with larger power, the RC parameter will change correspondingly, the selection and the setting of the parameter are also very inconvenient, and finally the problem of output ripple cannot be solved well. Therefore, the utility model also designs a passive filter added at the output end, and simultaneously adds a design of an anti-reverse circuit, which can effectively prevent the device from being burnt by current recharging, thereby protecting the whole power supply and improving the safety and reliability of the power supply;
(5) For the protection mechanism in the power supply, the overheating protection is added from the traditional overvoltage and overcurrent protection, so that the reliability and the safety of the power supply are greatly improved.
The various embodiments described herein, or certain features, structures, or characteristics thereof, may be combined as suitable in one or more embodiments of the invention.
As used herein, the singular forms "a", "an" and "the" include plural references (i.e., have the meaning "at least one"), unless the context clearly dictates otherwise. It will be further understood that the terms "has," "includes" and/or "including," when used in this specification, specify the presence of stated features, elements, components, groups, and/or components, but do not preclude the presence or addition of one or more other features, operations, elements, components, groups, components, and/or groups thereof. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.
Some preferred embodiments of the invention have been described in the foregoing, but it should be emphasized that the invention is not limited to these embodiments, but can be implemented in other ways within the scope of the inventive subject matter. The present invention can be modified and modified by those skilled in the art without departing from the spirit and scope of the present invention, and these modifications and changes still fall into the protection scope of the present invention.
Claims (10)
1. The utility model provides a AC/DC power module power supply system which characterized in that, includes an at least module control panel, and each module control panel includes:
a voltage conversion module comprising at least two AC/DC modules connected in parallel, each AC/DC module for converting an AC input voltage to a DC output voltage;
the current sampling circuit is used for sampling the output current of each AC/DC module and converting the output current into a corresponding first voltage signal;
the voltage sampling circuit is used for sampling the output voltage of the voltage conversion module and generating a second voltage signal;
the current-sharing compensation circuit is used for generating differential voltage signals based on the first voltage signals and generating first reference voltage signals after processing the differential voltage signals;
and the voltage compensation circuit is used for outputting a control voltage signal based on the second voltage signal or based on the second voltage signal and the first reference voltage signal and transmitting the control voltage signal to the main control unit in each AC/DC module, and the main control unit adjusts the direct-current output voltage of the voltage conversion module according to the control voltage signal.
2. The AC/DC power module supply system of claim 1, wherein the voltage compensation circuit comprises:
the isolation optocoupler is used for outputting a third voltage signal based on the second voltage signal;
the PI regulator is used for comparing the third voltage signal with a voltage reference value and then outputting a second reference voltage signal;
a comparator for outputting a control voltage signal based on the second reference voltage signal or outputting a control voltage signal based on the first and second reference voltage signals.
3. The AC/DC power module power supply system of claim 1, wherein the current sharing compensation circuit comprises:
the first integrated operational amplifier is used for processing the first voltage signal and then generating a fourth voltage signal;
the isolation optocoupler is used for outputting a fifth voltage signal based on the fourth voltage signal;
a second integrated operational amplifier for outputting a differential voltage signal based on the fifth voltage signal;
and the current equalizing chip is used for processing the differential voltage signal and then generating a first reference voltage signal.
4. The AC/DC power module supply system of claim 1, further comprising at least one output connector, wherein an anti-back circuit is disposed between the output of the voltage conversion module and the corresponding output connector, and the anti-back circuit is configured to prevent current from flowing back to burn the AC/DC module.
5. The AC/DC power supply module power supply system of claim 4, wherein a passive filter circuit is arranged between the anti-reverse circuit and the output connector for filtering interference and noise and reducing output ripple.
6. The AC/DC power module supply system of claim 1, further comprising a front panel having at least one rocker switch disposed thereon, each rocker switch for controlling activation of a corresponding voltage conversion module.
7. The AC/DC power module supply system of claim 6, wherein said front panel further has at least one indicator light disposed thereon, each indicator light being connected to the output of a corresponding voltage conversion module and indicating the status of a corresponding module control board.
8. The AC/DC power module supply system of claim 1, further comprising at least one temperature control device, each temperature control device connected between the output of a corresponding voltage conversion module and a corresponding heat sink, the temperature control device being turned on when the temperature exceeds a set value.
9. The AC/DC power module supply system of claim 1, wherein the at least one module control board comprises first, second, and third module control boards, the output loops of the first, second, and third module control boards being electrically isolated from each other.
10. The AC/DC power module supply system of claim 9, wherein the first module control board output power is 1.7kW, the second module control board output power is 2.3kW, and the third module control board output power is 7.4kW.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222025467.4U CN218387298U (en) | 2022-08-02 | 2022-08-02 | AC/DC power module power supply system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222025467.4U CN218387298U (en) | 2022-08-02 | 2022-08-02 | AC/DC power module power supply system |
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| Publication Number | Publication Date |
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| CN218387298U true CN218387298U (en) | 2023-01-24 |
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| CN202222025467.4U Active CN218387298U (en) | 2022-08-02 | 2022-08-02 | AC/DC power module power supply system |
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