CN112671216B - Multi-output power supply and power distribution control method thereof - Google Patents
Multi-output power supply and power distribution control method thereof Download PDFInfo
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Abstract
本发明提供了多输出的电源供应器及其功率分配控制方法，本发明的电源供应器包含电源转换模组及二切换模组，该电源转换模组的二电源输出端分别通过该二切换模组选择性的导通或不导通二个对外的输出埠。因此，该电源供应器可以根据该二输出埠的需求功率及二电源输出端的额定功率，控制由哪一电源输出端供电至哪一电源输出埠，或者由二电源输出端合并输出；如此一来，该电源转换模组的二电源输出端可以分别针对不同的额定功率进行最佳化设计，增加最佳转换效率的设计范围，对使用者而言亦不须根据不同的额定功率选择不同的输出埠，同时达到提升使用便利性的目的。
The present invention provides a multi-output power supply and a power distribution control method thereof. The power supply of the present invention comprises a power conversion module and two switching modules. The two power output ends of the power conversion module selectively conduct or do not conduct two external output ports through the two switching modules. Therefore, the power supply can control which power output end supplies power to which power output port according to the required power of the two output ports and the rated power of the two power output ends, or combine the two power output ends for output; in this way, the two power output ends of the power conversion module can be optimized for different rated powers, increase the design range of the best conversion efficiency, and users do not need to select different output ports according to different rated powers, thereby achieving the purpose of improving the convenience of use.
Description
Technical Field
A power supply and a power distribution control method thereof, in particular to a multi-output power supply and a power distribution control method thereof.
Background
In recent years, consumer electronic products are more and more popular and are close to life demands, and most users often carry more than one electronic product with them, and often include electronic products with a larger output power, such as existing tablet computers or notebook computers, with a rated required power of 45W or more. Therefore, a power supply has a plurality of output ports, each of which can simultaneously provide output power, and a single output port having a larger total output power is one of the main required products.
Referring to fig. 10, in response to the above-mentioned requirements, the conventional multi-output power supply device includes a first ac/dc conversion unit a/D1, a second ac/dc conversion unit a/D2, a first switch SW1, a second switch SW2, a third switch SW3, a first output port O/P1 and a second output port O/P2. The first AC/dc conversion unit a/D1 and the second AC/dc conversion unit a/D2 both receive an AC input power AC, and the first AC/dc conversion unit a/D1 has a first output terminal P1, and the second AC/dc conversion unit a/D2 has a second output terminal P2. The first switch SW1 is electrically connected between the first output terminal P1 and the first output port O/P1, the second switch SW2 is electrically connected between the second output terminal P2 and the second output port O/P2, and the third switch SW3 is electrically connected between the first output terminal P1 of the first ac/dc converting unit a/D1 and the second output terminal P2 of the second ac/dc converting unit a/D2.
When the first switch SW1 is turned on and the second switch SW2 and the third switch SW3 are turned on, the first ac/dc conversion unit a/D1 can output a first dc power to the first output port O/P1 through the first switch SW1, and when the second switch SW2 is turned on and the first switch SW1 and the third switch SW3 are turned on, the second ac/dc conversion unit a/D2 can output a second dc power to the second output port O/P2 through the second switch SW 2. When the third switch SW3 is turned on, the first switch SW1 may be controlled to be turned on and the second switch SW2 may be controlled to be turned on, or the second switch SW2 may be controlled to be turned on and the first switch SW1 may be controlled to be turned on, so as to connect the first ac/dc converting unit a/D1 and the second ac/dc converting unit a/D2 in parallel to the first output port O/P1 or the second output port O/P2. Therefore, when the first AC/DC conversion unit A/D1 and the second AC/DC conversion unit A/D2 are connected in parallel, the first AC/DC conversion unit A/D1 and the second AC/DC conversion unit A/D2 are combined to output so as to achieve larger total output power. In order to facilitate the user not to select the output port intentionally, the first ac/dc conversion unit a/D1 and the second ac/dc conversion unit a/D2 are generally designed to have the same conversion power.
An example of application of the multi-output power supply device is illustrated below.
Assuming that the rated conversion power of the first ac/dc conversion unit a/D1 and the second ac/dc conversion unit a/D2 is 45W, the rated total output power (highest output power) of the power supply device is 90W. When the first output port O/P1 and the second output port O/P2 are respectively connected to a power-requiring device below 45W, the first switch SW1 and the second switch SW2 are turned on, the third switch SW3 is turned off, and the first ac/dc conversion unit a/D1 and the second ac/dc conversion unit a/D2 respectively supply power to the first output port O/P1 and the second output port O/P2. However, when the first output port O/P1 is connected to a power-requiring device with a power requirement of 75W, the power supply device controls the first switch SW1 to be turned on, the second switch SW2 to be turned off, and the third switch SW3 to be turned off. Thus, the first output terminal P1 of the first ac/dc conversion unit a/D1 and the second output terminal P2 of the second ac/dc conversion unit a/D2 are both connected to the first output port O/P1 and supply power to the first output port O/P1, so that the power supply of the first output port O/P1 is sufficient to provide the 75W of the required power, and the second output port O/P2 is not supplied.
That is, the first output port O/P1 and the second output port O/P2 can only output power of 45W or less simultaneously, or can be combined with one of the output ports to output power of 45W to 90W. For example, when the power-required device is connected to the first output port O/P1 and the power-required device is 20W, it receives the output power provided by the first ac/dc conversion unit a/D1, and when the power-required device is 50W, it receives the combined output power of the first ac/dc conversion unit a/D1 and the second voltage transformer, and the second ac/dc conversion unit a/D2 is connected to the first output port O/P1 through the third switch SW3, the second output port O/P2 does not provide the output power. However, the power supply device has 40W of idle power as a whole, which is wasteful.
In other words, each of the output ports of the power supply can only output half or less of the total output power at the same time. When the required power of one output port is slightly higher than half of the total output power, the other output port cannot be powered, which causes inconvenience in use and limitation and waste in switching output design. Therefore, the multi-output power supply device of the prior art must be further improved.
Disclosure of Invention
In view of the problems of poor power supply conversion efficiency and inconvenience in use caused by the limitation of the conventional multi-output power supply device in the power output switching design, the present invention provides a multi-output power supply device comprising:
A first output port;
A second output port;
the power supply conversion module is provided with a first power supply output end and a second power supply output end, wherein the first power supply output end outputs a first output power supply, and the second power supply output end outputs a second output power supply;
A first switching module electrically connected between the first power output end and the first output port and the second output port, and selectively connecting the first power output end to one of the first output port and the second output port, or selectively connecting the first power output end to the first output port and the second output port;
The second switching module is electrically connected between the second power output end and the first output port and the second output port, and selectively conducts the second power output end to one of the first output port and the second output port or selectively conducts or does not conduct the second output end to the first output port and the second output port.
The first switching module and the second switching module of the power supply of the invention are respectively connected with the first power output end, the first output port and the second output port, and the second power output end, the first output port and the second output port. By the first switching module and the second switching module, the first power output end of the power conversion module can selectively provide a first output power for the first output port or the second output port, and the second power output end can simultaneously selectively provide a second output power for the first output port or the second output port. Therefore, the first power output end and the second power output end not only can combine and output one of the output ports at the same time to provide higher output power, but also can output any one of the output ports.
Because the first power output end and the second power output end can output any output port respectively, even if the rated power of the first power output end and the rated power of the second power output end of the power supply are different, the use methods of the two output ports are the same for users, and the output port does not need to be selected deliberately according to the required power of the power-requiring device.
The invention also provides an output power supply power distribution control method, which comprises the following steps:
when detecting that the first output port has a first required power, judging whether the first required power is larger than a first rated power of the first power output end;
if so, conducting the first power output terminal to the first output port but not to the second output port, and conducting the second power output terminal to the first output port but not to the second output port;
If not, further judging whether the first required power is larger than a second rated power of the second output end;
If the first power demand is smaller than the first rated power and larger than the second rated power, the first power output end is conducted to the first output port but not to the second output port, and the second power output end is not conducted to the first output port and the second output port;
if the first power requirement is smaller than the second rated power, the first power output end is not conducted to the first output port and the second output port, and the second power output end is conducted to the first output port but not conducted to the second output port.
In the method, since the first output power of the first power output end and the second output power of the second power output end can be distributed to the first output port or the second output port at will, when one of the connection ports generates first required power, the power can be provided by the first power output end, the second power output end or the combination of the first power output end and the second power output end according to the comparison of the first required power with the first rated power and the second rated power, so as to achieve the best output efficiency.
Furthermore, since the rated powers of the first power output terminal and the second power output terminal can be set to be different, the optimal design can be performed according to the respective rated powers, and thus the overall conversion efficiency is better under different use situations. For example, the rated power of the first power output end is 60W, the rated power of the second power output end is 30W, and the total output power of the power supply is 90W. When the required power of one output port is 20W, the output port will provide the second output power of the second power output end, when the required power of one output port is 50W, the output port will provide the first output power of the first power output end, and at the same time, the other output port can still provide the power of the second power output end 30W of the other power-requiring device, and when the required power of one output port is 75W, the output port will provide the combined output power of the first power output end and the second power output end.
As can be seen from the above description, the power conversion module in the power supply of the present invention can be optimally designed according to a plurality of different rated powers, so as to provide better conversion efficiency of the power supply in different use situations; the power supply device has the advantages that a user can also select an output port to be connected with the power-requiring device at will, an output power supply with better efficiency is obtained, the operation conversion efficiency of the power supply is improved, the use convenience is improved, and the problems of the prior art that the performance design and the use of the multi-output power supply are limited are solved.
Drawings
FIG. 1 is a schematic block diagram of a multi-output power supply according to the present invention.
FIG. 2 is a circuit block diagram of a preferred embodiment of the multi-output power supply of the present invention.
FIG. 3 is a circuit block diagram of a preferred embodiment of the multi-output power supply of the present invention.
FIG. 4 is a circuit block diagram of a preferred embodiment of the multi-output power supply of the present invention.
FIG. 5 is a circuit block diagram of a preferred embodiment of the multi-output power supply of the present invention.
Fig. 6 and 7 are flow diagrams of the power distribution control method of the present invention.
FIG. 8 is a circuit block diagram of a preferred embodiment of the multi-output power supply of the present invention.
FIG. 9 is a circuit block diagram of a preferred embodiment of the multi-output power supply of the present invention.
FIG. 10 is a schematic circuit block diagram of a conventional multi-output power supply.
Detailed Description
Referring to fig. 1, the multi-output power supply of the present invention includes a first output port O/P1, a second output port O/P2, a power conversion module 10, a first switching module 20 and a second switching module 30. The power conversion module 10 has a first power output end N1 and a second power output end N2, and the power conversion module 10 converts an AC input power AC to generate a first output power and a second output power, the first power output end N1 outputs the first output power, the second power output end N2 outputs the second output power, and the rated power of the first power output end N1 and the rated power of the second power output end N2 are preferably different. An input end of the first switching module 20 is electrically connected to the first power output end N1, two output ends of the first switching module 20 are respectively electrically connected to the first output port O/P1 and the second output port O/P2, and the first switching module 20 selectively conducts the first power output end N1 to one of the first output port O/P1 and the second output port O/P2, or selectively conducts or does not conduct the first power output end N1 to the first output port O/P1 and the second output port O/P2. An input end of the second switching module 30 is electrically connected to the first power output end N1, two output ends of the second switching module 30 are respectively electrically connected to the first output port O/P1 and the second output port O/P2, and the second switching module 30 selectively conducts the second output end N2 to one of the first output port O/P1 and the second output port O/P2, or selectively conducts or does not conduct the second output end N2 to the first output port O/P1 and the second output port O/P2.
Preferably, the first switching module 20 and the second switching module 30 are respectively provided with a controllable electronic switch between the first power output end N1, the second power output end N2 and the first output port O/P1 and the second output port O/P2, so as to achieve the purpose of selectively conducting or not conducting between the first power output end N1 and the first output port O/P1 and the second output port O/P2, and between the second power output end N2 and the first output port O/P1 and the second output port O/P2.
Referring to fig. 2, in more detail, the first switching module 20 includes a first switch SW1 and a second switch SW2, and the second switching module 30 includes a third switch SW3 and a fourth switch SW4. The first switch SW1 is electrically connected between the first power output terminal N1 and the first output port O/P1, the second switch SW2 is electrically connected between the first power output terminal N1 and the second output port O/P2, the third switch SW3 is electrically connected between the second power output terminal N2 and the first output port O/P1, and the fourth switch SW4 is electrically connected between the second power output terminal N2 and the second output port O/P2. The first to fourth switches SW4 may be controlled to be conductive or non-conductive (i.e., open circuit) respectively to control the first power output terminal N1 and the second power output terminal N2 to provide the output power to the first output port O/P1 or the second output port O/P2 respectively.
Referring to the following table (table one), by controlling the conducting and non-conducting (open) states of the first to fourth switches SW1 to SW4, respectively, the states of the first output power P1 and the second output power P2 allocated to the first output port O/P1 and the second output port O/P2 are controlled. Wherein "O" in the columns of the first switch SW1 to the fourth switch SW4 indicates conduction, "X" indicates non-conduction, and "P1" in the columns of the first output port O/P1 and the second output port O/P2 indicates supply of the first output power source, "P2" indicates supply of the second output power source, "P1+P2" indicates combined output of the first and second output power sources, and NO indicates NO supply of the output power source.
| SW1 | SW2 | SW3 | SW4 | O/P1 | O/P2 |
| X | X | X | X | NO | NO |
| O | X | X | X | P1 | NO |
| X | O | X | X | NO | P1 |
| X | X | O | X | P2 | NO |
| O | O | X | X | P1 | P1 |
| X | X | O | O | P2 | P2 |
| O | X | X | O | P1 | P2 |
| X | O | O | X | P2 | P1 |
| O | X | O | X | P1+P2 | NO |
| X | O | X | O | NO | P1+P2 |
List one
Referring to fig. 3, the power supply preferably further includes a control module 40, and the control module 40 is electrically connected to the first output port O/P1, the second output port O/P2, the first switching module 20, and the second switching module 30. The control module 40 detects a first required power of the first output port O/P1 and detects a second required power of the second output port O/P2, and controls the first switching module 20 to selectively turn on one of the first output port O/P1 and the second output port O/P2 or both of the first output port O/P1 and the second output port O/P2 according to the first required power and the second required power, and controls the second switching module 30 to selectively turn on one of the first output port O/P1 and the second output port O/P2 or both of the first output port O/P1 and the second output port O/P2. The control module 40 preferably communicates with a first power-requiring device connected to the first output port O/P1 via a power supply Protocol (Power Delivery Protocol; PD Protocol) to detect the first power requirement, and also communicates with a second power-requiring device connected to the second output port O/P2 via the power supply Protocol to detect the first power requirement. The control module 40 can achieve the above control purpose by controlling the first to fourth switches SW 4. In one embodiment of the present invention, the control module 40 may be a control chip.
As can be seen from the above table (Table one), the first output power P1 and the second output power P2 are distributed to the first output port O/P1 and the second output port O/P2 in at least several ways, wherein the first output power P1 is provided to the first output port O/P1 and the second output power P2 is provided to the second output port O/P2, the first output power P1 is provided to the second output port O/P2 and the second output power P2 is provided to the first output port O/P1, the first output power P1 and the second output power P2 are provided to the first output port O/P1, or the first output power P1 and the second output power P2 are provided to the second output port O/P2.
Referring to fig. 4, in one embodiment, the power conversion module 10 includes an ac/dc conversion unit 11, a first dc voltage transformation unit 12, and a second dc voltage transformation unit 13. The AC-dc conversion unit 11 receives an AC input power AC, converts the AC input power AC into a dc power, the first dc-dc conversion unit 12 is electrically connected to the AC-dc conversion unit 11 to receive the dc power and convert the dc power into the first output power P1, which is output from the first power output terminal N1, and the second dc-dc conversion unit 13 is electrically connected to the AC-dc conversion unit 11 to receive the dc power and convert the dc power into the second output power P2, which is output from the second power output terminal N2.
As further shown in fig. 5, the ac/dc conversion unit 11 preferably includes a flyback Converter (Flyback Converter), the first dc/dc conversion unit 12 includes a first Buck Converter 121 (Buck Converter) and a first controller 122, and the second dc/dc conversion unit 13 includes a second Buck Converter 131 and a second controller 132.
After the AC-dc conversion unit 11 converts the AC output power AC into a dc power, the first dc voltage converting unit 12 and the second dc voltage converting unit 13 convert the dc power into a first output power P1 and a second output power P2, respectively, and the first switching module 20 and the second switching module 30 distribute the first output power P1 and the second output power P2 to the first output port O/P1 and the second output port O/P2. In this way, an ac/dc conversion unit is not required to be separately disposed for each output port, so as to reduce the space increased by the isolated converter, and the first dc voltage transformation unit 12 and the second dc voltage transformation unit 13 can be respectively optimally designed according to the first rated power of the first power output terminal N1 and the second rated power of the second power output terminal N2, so as to respectively provide better conversion efficiency and provide a wider range of high conversion efficiency power supply as a whole. In the present embodiment, the first rated power of the first power output terminal N1 is the optimal conversion power of the first dc voltage transforming unit 12, and the second rated power of the second power output terminal N2 is the optimal conversion power of the second dc voltage transforming unit 13.
In the present embodiment, the control module 40 includes a first controller 122 of the first dc voltage unit 12 and a second controller 132 of the second dc voltage unit 13. The first controller 122 is electrically connected to the first output port O/P1 to detect a first power requirement of the first output port O/P1, and is electrically connected to the first switching module 20. The second controller 132 is electrically connected to the second output port O/P2 to detect a second power requirement of the second output port O/P2, and is electrically connected to the second switching module 30. The first controller 122 and the second controller 132 are electrically connected to each other to communicate and exchange the first demand power and the second demand power. Thus, the first controller 122 and the second controller 132 both know the first required power and the second required power, and control the first switching module 20 and the second switching module 30 respectively.
The control module 40 in the present embodiment includes the first controller 122 of the first dc voltage unit 12 and the second controller 132 of the second dc voltage unit 12, and the first and second controllers 122 and 132 directly communicate with each other to cooperatively obtain the first required power and the second required power, so that an additional processor is not required to be provided as the control module 40 for controlling the first and second switching modules 20 and 30.
Preferably, the first rated power of the first power output terminal N1 is different from the second rated power of the second dc voltage transforming unit 13. That is, the first dc voltage transforming unit 12 and the second dc voltage transforming unit 13 are respectively designed in an optimized manner according to two output powers, so that the power supply has a wider optimized design range. That is, when the electrical device is connected to one of the output ports so that the output port has a required power, the first switching module 20 and the second switching module 30 can select the output power source with the rated power higher than and closer to the required power to be provided to the one of the output ports. The first output port O/P1 is connected to the first power-requiring device and has a first power requirement, which will be described below. It should be noted that when the second output port O/P2 has a first required power, the logic of selecting the output power source with the rated power higher than and closer to the required power to provide the output port is used to determine and provide the output power source to the second output port.
In a preferred embodiment, when the control module 40 detects that the first output port O/P1 has a first required power, the control module 40 determines whether the first required power is greater than the first rated power. If yes, the control module 40 controls the first switching module 20R to conduct the first power output terminal N1 to the first output port O/P1 and controls the second switching module 30 to conduct the second power output terminal N2 to the first output port O/P1, if not, the control module 40 further determines whether the first required power is greater than the second rated power, if the first required power is less than the first rated power and greater than the second rated power, the control module 40 controls the first switching module 20 to conduct the first power output terminal N1 to the first output port O/P1 and controls the second switching module 30 to conduct the second power output terminal N2 to the first output port O/P1 and the second output port O/P1, i.e. the first required power is provided by the first output power of the first power output terminal N1, and if the first required power is less than the second required power, the control module 40 controls the first switching module 20 to conduct the first power output terminal N1 to the first output port O/P1 and the second power output port O/P1 and controls the second switching module 30 to conduct the second power output terminal N2 to the first output port O/P1 and the second output port O/P1.
As shown in fig. 6, the power allocation control method of the present invention includes the following steps:
When detecting that the first output port O/P1 has a first required power (S101), determining whether the first required power is greater than the first rated power (S102);
If so, the first power output terminal N1 is conducted to the first output port O/P1 but not to the second output port O/P2, and the second power output terminal N2 is conducted to the first output port O/P1 but not to the second output port O/P2 (S103);
if not, further judging whether the first required power is greater than the second rated power of the second output end (S104);
If the first power requirement is smaller than the first rated power and larger than the second rated power, the first power output end N1 is conducted to the first output port O/P1 but not to the second output port O/P2, and the second power output end N2 is not conducted to the first output port O/P1 and the second output port O/P2 (S105);
If the first power requirement is less than the second power rating, the first power output N1 is not conducted to the first output port O/P1 and the second output port O/P2, and the second power output N2 is conducted to the first output port O/P1 but not to the second output port O/P2 (S106).
The first power rating of the first power output N1 is assumed to be 60W, and the first power rating of the second power output N2 is assumed to be 30W.
Under the first usage situation, when a required power of the first output port O/P1 is smaller than the second rated power, for example, 20W, the power supply has three possible power distribution modes, namely, the first power output end N1 is conducted to the first output port O/P1, the second power output end N2 is conducted to the first output port O/P1, and the third power output end N1 and the second power output end N2 are both conducted to the first output port O/P1. According to the general knowledge of the buck conversion efficiency, since the second rated power (30W) of the second power output terminal N2 is closest to the first required power (20W), the second power output power P2 has an optimal power calibration. Therefore, the control module 40 controls the second switching module 30 to turn on the second power output terminal N2 to the first output port O/P1, and the first power output terminal N1 is not turned on to the first output port O/P1 or the second output port O/P2.
In a second use case, when the first power requirement of the first output port O/P1 is between the first rated power and the second rated power, for example, 50W, the power supply has two possible power distribution modes, namely, the first mode is to conduct both the first power output end N1 and the second power output end N2 to the first output port O/P1, the second mode is to conduct only the first power output end N1 to the first output port O/P1, and the second power output end N2 is not to conduct to the first output port O/P1. The second preferred method is that the first power output terminal N1 has a first rated power enough to load the required power, and the second power output terminal N2 has a second power output P2 supplied to the first output port O/P1 at the same time, which results in power waste. Therefore, the control module 40 controls the first switching module 20 to conduct the first power output terminal N1 to the first output port O/P1, and the second switching module 30 to not conduct the second power output terminal N2 to the first output port O/P1 and the second output port O/P2, so as to provide the first output power P1 of the first power output terminal N1 to the power-requiring device of the second output port O/P2.
In this way, when the second output port O/P2 is additionally connected to another power device, the control module 40 controls the second switching module 30 to switch on the second power output terminal N2 and the second output port O/P2, and maintains the second power output terminal N2 and the first output port O/P1 to be non-conductive, so as to provide the second output power P2 of the second power output terminal N2 to the second output port O/P2.
Since the first switching module 20 and the second switching module 30 of the power supply of the present invention enable the output power of the first power output terminal N1 and the second power output terminal N2 to be flexibly distributed, even when the required power of the power-requiring device connected to one of the output ports is greater than half of the total rated power of the power supply, the control module 40 only needs to switch the output power sufficient to provide the required power to the one of the output ports as long as the required power is still less than the larger one of the first power output terminal N2 and the second power output terminal N2, and the output power of the other power output terminal is still idle at the moment and can be used for supplying power when the other power-requiring device is connected to the other output port.
In a third usage scenario, when the required power of the first output port O/P1 is greater than the first rated power, for example, 75W, the control module 40 controls the first switching module 20 and the second switching module 30 to turn on the first output port O/P1 to both the first power output terminal N1 and the second power output terminal N2 so that the first output power P1 and the second output power P2 of the first power output terminal N1 and the second power output terminal N2 are combined and output to the first output port O/P1.
Further, when the first output port O/P1 has a first power requirement and the second output port O/P2 has a second power requirement, the control module 40 determines whether the first power requirement is greater than the second rated power. If yes, the control module 40 controls the first switching module 20 to conduct the first power output terminal N1 and the first output port O/P1 and controls the second switching module 30 to conduct the second power output terminal N2 and the second output port O/P2, and if not, the control module 40 controls the first switching module 20 to conduct the first power output terminal N1 and the second output port O/P2 and controls the second switching module 30 to conduct the second power output terminal N2 and the first output port O/P1.
Referring to fig. 7, the control method of the present invention further comprises the following steps:
When it is further detected that the second output port O/P2 has a second required power (S201), determining whether the first required power is greater than the second rated power (S202);
If so, the first power output terminal N1 is conducted to the first output port O/P1 but not to the second output port O/P2, and the second power output terminal N2 is conducted to the second output port O/P2 but not to the first output port O/P1 (S203);
if not, the first power output N1 is conducted to the second output port O/P2 but not to the first output port O/P1, and the second power output N2 is conducted to the first output port O/P1 but not to the second output port O/P2 (S204).
In this embodiment, when the first output port O/P1 is connected to one power-requiring device and has the first power requirement, and the second output port O/P2 is connected to another power-requiring device and has the second power requirement, the control module 40 simply compares the first power requirement and the second power requirement with the rated powers of the first power output end N1 and the second power output end N2. Only when the first power requirement is smaller than the smaller second rated power, the control module 40 controls the second switching module 30 to turn on the second power output terminal N2 and the first output port O/P1, and provides the second power output P2 to the first output port O/P1, so as to avoid the inefficiency caused by the higher rated power of the first power output P1. In other cases, the first output power P1 is provided to the first output port O/P1, and the second output power P2 is provided to the second output port O/P2.
Referring to fig. 8, in another preferred embodiment of the present invention, the power supply further comprises a first basic power supply unit 61 and a second basic power supply unit 62. The first basic power supply unit 61 is electrically connected between the first power output terminal N1 and the first output port O/P1, and the second basic power supply unit 62 is electrically connected between the first power output terminal N1 and the first output port O/P1. When the first switch module 20 conducts the first power output terminal N1 to the second output port O/P2 but not to the first output port O/P1, the second switch module 30 conducts the second power output terminal N2 to the second output port O/P2 but not to the first output port O/P1, the first basic power supply unit 61 receives the first output power P1, converts the first output power P1 into a basic output power and provides the basic output power to the first output port O/P1, and when the first switch module 20 conducts the first power output terminal N1 to the first output port O/P1 but not to the second output port O/P2, the second switch module 30 conducts the second power output terminal N2 to the first output port O/P1 but not to the second output port O/P2, the second basic power supply unit 62 receives the second output power P2, converts the second output power to the basic output power and provides the first output power to the first output port O/P1.
In this embodiment, when the required power of one output port is higher than the higher first rated power and the first switching module 20 and the second switching module 30 turn on the output port with the first power output terminal N1 and the second power output terminal N2 to supply the required power, the first basic power supply unit 61 and the second basic power supply unit 62 are used for additionally converting the first output power P1 or the second output power P2 into a lower basic output power, for example, a basic output power of 5V/1A, and providing the basic output power to the other output port, so that the other output port can also have a basic output power, and the other output port is prevented from being completely unpowered. That is, in the present embodiment, when one of the output ports has a power demand higher than the first rated power so that both the first and second output power sources P1 and P2 are provided to the output port, even when the other output port is connected to another power-requiring device, the first basic power source providing unit 61 or the second basic power source providing unit 62 additionally provides a basic output power source to the other output port without readjusting the switching states of the first switching module 20 and the second switching module 30.
Referring to fig. 9, in a third preferred embodiment of the present invention, the power supply further includes a third output port O/P3 and a third switching module 40, and the power conversion module 10 further includes a third power output terminal N3, and outputs a third output power P3 from the third power output terminal. The third switching module 40 is electrically connected between the third power output terminal N3 and the first output port O/P1, the second output port O/P2, and the third output port O/P3, and selectively connects the third power output terminal N3 to one or two of the first output port O/P1, the second output port O/P2, and the third output port O/P3, or selectively connects or disconnects the third power output terminal N3 to the first output port O/P1, the second output port O/P2, and the third output port O/P3. The first switching module 20 is also electrically connected between the first power output terminal N1 and the third output port O/P3 and selectively connects or disconnects the first power output terminal N1 to the third output port O/P3, and the second switching module 30 is also electrically connected between the second power output terminal N2 and the third output port O/P3 and selectively connects or disconnects the second power output terminal N2 to the third output port O/P3.
When the power supply has three output ports, the power conversion module 10 further includes a third power output terminal N3, and the first switching module 20, the second switching module 30 and the third switching module 40 include three switches respectively and electrically connected between the first to third power output terminals N3 and the first to third output ports O/P3, so as to control conduction or non-conduction between the power output terminals and the output ports respectively.
In addition, the power conversion module 10 includes the ac/dc conversion unit 11 and a dc transforming unit corresponding to each power output terminal. For example, in the preferred embodiment of the present invention, a third dc voltage transformation unit 14 is further included. Preferably, the third dc voltage transforming unit 14 comprises a buck converter and a controller. The power converter topology according to the present invention enables the power conversion module 10 to flexibly augment the design according to the number of power outputs and output power requirements. The power supply has the advantages that the optimal design of each buck converter can be respectively carried out according to different rated powers of the power supply output ends, the isolated AC/DC conversion is not required to be additionally added, the space utilization is saved, and the overall power supply conversion efficiency under various different use situations is optimized.
The above description is only of the preferred embodiments of the present invention, and is not intended to limit the present invention in any way, although the present invention has been described in the preferred embodiments, it is not intended to limit the present invention, and any person skilled in the art will not depart from the scope of the present invention, while the above disclosure is directed to various equivalent embodiments, which are capable of being modified or varied in several ways, any simple modification, equivalent changes and variation of the above embodiments according to the technical principles of the present invention will still fall within the scope of the technical aspects of the present invention.
Claims (10)
1. A multi-output power supply, comprising:
A first output port;
A second output port;
the power supply conversion module is provided with a first power supply output end and a second power supply output end, wherein the first power supply output end outputs a first output power supply, and the second power supply output end outputs a second output power supply;
A first switching module electrically connected between the first power output end and the first output port and the second output port, and selectively connecting the first power output end to one of the first output port and the second output port, or selectively connecting the first power output end to the first output port and the second output port;
A second switching module electrically connected between the second power output end and the first output port, the second output port, and selectively connecting the second power output end to one of the first output port and the second output port, or selectively connecting or disconnecting the second output end to the first output port and the second output port;
a control module electrically connected to the first output port, the second output port, the first switching module, and the second switching module,
The control module detects a first required power of the first output port and a second required power of the second output port, and controls the first switching module and the second switching module according to the first required power and the second required power.
2. The multi-output power supply of claim 1, wherein the power conversion module comprises:
An AC/DC conversion unit for receiving an AC input power and converting the AC input power into a DC power;
The first direct current voltage converting unit is electrically connected with the alternating current-direct current converting unit to receive the direct current power supply, converts the direct current power supply into the first output power supply and outputs the first output power supply through the first power supply output end;
The second direct current transformation unit is electrically connected with the alternating current-direct current conversion unit to receive the direct current power supply, and converts the direct current power supply into a second output power supply which is output by the second power supply output end.
3. The multi-output power supply of claim 2, wherein,
The first DC voltage transformation unit comprises a first voltage reduction converter and a first controller, the second DC voltage transformation unit comprises a second voltage reduction converter and a second controller, the control module comprises the first controller and the second controller,
The first controller is electrically connected with the first output port to detect the first required power of the first output port, and is electrically connected with the first switching module to control the first switching module;
The second controller is electrically connected to the second output port to detect the second power requirement of the second output port and electrically connected to the second switching module to control the second switching module, and
The first controller and the second controller are electrically connected with each other to communicate the first demand power and the second demand power, and the first controller controls the first switching module according to the first demand power and the second demand power, and the second controller controls the second switching module according to the first demand power and the second demand power.
4. The multi-output power supply of claim 1, wherein,
The first switching module comprises:
a first switch electrically connected between the first power output terminal and the first output port;
A second switch electrically connected between the first power output terminal and the second output port;
the second switching module comprises:
A third switch electrically connected between the second power output terminal and the first output port;
a fourth switch electrically connected between the second power output terminal and the second output port.
5. The multi-output power supply of claim 1, further comprising:
When the first switching module conducts the first power supply output end to the second output port but does not conduct the first power supply output end to the first output port, and the second switching module conducts the second power supply output end to the second output port but does not conduct the second power supply output end to the first output port, the first basic power supply unit receives the first output power supply, converts the first output power supply into a basic output power supply and provides the basic output power supply to the first output port;
And when the first switching module conducts the first power output end to the first output port but does not conduct the first power output end to the second output port, the second switching module conducts the second power output end to the first output port but does not conduct the second power output end to the second output port, and the second basic power supply unit receives the second output power, converts the second output power into the basic output power and provides the basic output power to the first output port.
6. The multi-output power supply of any one of claims 1 to 3, wherein the first power output has a first power rating, the second power output has a second power rating, and the first power rating is greater than the second power rating;
when the control module detects that the first output port has the first required power, the control module judges whether the first required power is larger than the first rated power;
If yes, the control module controls the first switching module to conduct the first power output end to the first output port but not to the second output port, and controls the second switching module to conduct the second power output end to the first output port but not to the second output port;
If not, the control module further judges whether the first required power is greater than the second rated power;
If the first power demand is smaller than the first rated power and larger than the second rated power, the control module controls the first switching module to conduct the first power output end to the first output port but not to the second output port, and controls the second switching module to not conduct the second power output end to the first output port and the second output port;
if the first power requirement is smaller than the second rated power, the control module controls the first switching module to conduct the first power output end to the first output port and the second output port, and controls the second switching module to conduct the second power output end to the first output port but not to the second output port.
7. The multi-output power supply of claim 6, wherein,
When the control module detects that the first output port has the first required power and the second output port has the second required power, the control module judges whether the first required power is larger than the second rated power;
if yes, the control module controls the first switching module to conduct the first power output end to the first output port, and controls the second switching module to conduct the second power output end to the second output port but not to the first output port;
If not, the control module controls the first switching module to conduct the first power output end to the second output port but not to the first output port, and controls the second switching module to conduct the second power output end to the first output port but not to the second output port.
8. The multi-output power supply of claim 1, further comprising:
a third output port;
a third switching module, wherein,
The power conversion module further comprises a third power output end, wherein the third switching module is electrically connected between the third power output end and the first output port, the second output port and the third output port of the third power output end, and selectively conducts the third power output end to one or two of the first output port, the second output port and the third output port, or selectively conducts or does not conduct the third power output end to the first output port, the second output port and the third output port;
The first switching module is also electrically connected between the first power output end and the third output port and selectively conducts or does not conduct the first power output end to the third output port, and the second switching module is also electrically connected between the second power output end and the third output port and selectively conducts or does not conduct the second power output end to the third output port.
9. A multi-output power supply power distribution control method, characterized by being executed by the multi-output power supply of claim 1:
when detecting that the first output port has a first required power, judging whether the first required power is larger than a first rated power of the first power output end;
if so, conducting the first power output terminal to the first output port but not to the second output port, and conducting the second power output terminal to the first output port but not to the second output port;
If not, further judging whether the first required power is larger than a second rated power of the second output end;
If the first power demand is smaller than the first rated power and larger than the second rated power, the first power output end is conducted to the first output port but not to the second output port, and the second power output end is not conducted to the first output port and the second output port;
if the first power requirement is smaller than the second rated power, the first power output end is not conducted to the first output port and the second output port, and the second power output end is conducted to the first output port but not conducted to the second output port.
10. The method of claim 9, wherein when a second power requirement is detected in the second output port, determining whether the first power requirement is greater than the second rated power;
If so, conducting the first power output terminal to the first output port but not to the second output port, and conducting the second power output terminal to the second output port but not to the first output port;
If not, the first power output terminal is conducted to the second output port but not to the first output port, and the second power output terminal is conducted to the first output port but not to the second output port.
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