CN112671216A - 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, and more particularly, to a multi-output power supply and a power distribution control method thereof.
Background
In recent years, consumer electronic products are more and more diversified and meet living needs, most users often carry more than one electronic product with them, and often include electronic products requiring larger output power, such as existing tablet computers or notebook computers, and the rated required power is, for example, 45W or more. Therefore, a power supply has a plurality of output ports, each of which can provide output power simultaneously, and a single output port with a larger total output power is one of the major products.
Referring to fig. 10, in response to the above requirement, 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 open, the first ac/dc converting unit a/D1 can output a first dc power to the first output port O/P1 through the first switch SW 1; when the second switch SW2 is turned on and the first switches SW1 and SW3 are open, the second AC/DC converting 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 open, or the second switch SW2 may be controlled to be turned on and the first switch SW1 may be controlled to be open, 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 converting unit a/D1 and the second ac/dc converting unit a/D2 are connected in parallel, their outputs are combined to achieve a larger total output power. In order to facilitate users not to select output ports intentionally, the first ac/dc conversion unit a/D1 and the second ac/dc conversion unit a/D2 are designed to have the same conversion power.
An application example of the multi-output power supply apparatus 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 (maximum 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 with a power-requiring device below 45W, the first switch SW1 and the second switch SW2 are conducted, the third switch SW3 is not conducted, 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 required power of 75W, the power device controls the first switch SW1 to be conductive, the second switch SW2 to be non-conductive, and the third switch SW3 to be non-conductive. Thus, 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 are both connected to the first output port O/P1 and power the first output port O/P1, so that the power supplied to the first output port O/P1 is sufficient to provide the 75W required power, while the power supplied to the second output port O/P2 is not provided.
That is, the first output port O/P1 and the second output port O/P2 can output power below 45W simultaneously or combine with one of the output ports to output power above 45W and below 90W. For example, when the power demand device is connected to the first output port O/P1 and the power demand is 20W, it receives the output power provided by the first AC/DC converting unit A/D1; when the required power is 50W, it receives the combined output power of the first AC/DC converting unit A/D1 and the second transformer, and since the second AC/DC converting 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 output power. However, the power supply device still has 40W idle power as a whole, which is wasted.
In other words, each output port 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 of the output ports is slightly higher than half of the total output power, the other output port cannot supply power, which causes inconvenience in use and limitations and waste in the design of converting the output. Therefore, the prior art multi-output power supply device needs to be further improved.
Disclosure of Invention
In view of the limitations of the conventional multi-output power supply device in the power output switching design, which easily causes the poor power conversion efficiency and the inconvenience in use, the present invention provides 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, a first output power supply is output by the first power supply output end, and a second output power supply is output by the second power supply output end;
a first switching module electrically connected between the first power output terminal and the first and second output ports for selectively connecting the first power output terminal to one of the first and second output ports or selectively connecting or disconnecting the first power output terminal to the first and second output ports;
a second switching module electrically connected between the second power output terminal and the first output port and the second output port for selectively connecting the second power output terminal to one of the first output port and the second output port or selectively connecting or disconnecting the second output terminal 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 present invention are respectively connected to the first power output terminal and the first output port, the second output port, and the second power output terminal and the first output port, 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 to the first output port or the second output port, and the second power output end can selectively provide a second output power to the first output port or the second output port. Therefore, the first power output end and the second power output end not only can simultaneously output to one output port to provide higher output power, but also can respectively output to any output port.
Because the first power output end and the second power output end can output to any output port respectively, even if the rated powers of the first power output end and the second power output end of the power supply are different, the using methods of the two output ports are the same for users, and the output ports are not required to be selected according to the required power of the electric 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 end to the first output port but not to the second output port, and conducting the second power output end 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 required power is smaller than the first rated power and larger than the second rated power, conducting the first power output end to the first output port but not to the second output port, and not conducting the second power output end to the first output port and the second output port;
if the first required power is smaller than the second rated power, the first power output end is 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 to the second output port.
In the method, because the first output power of the first power output end and the second output power of the second power output end can be randomly distributed to the first or the second output port, when one of the connection ports generates a first required power, the power supply provided by the first power output end, the second power output end or the combination of the first required power and the first rated power can be determined according to the comparison of the first required power and the second rated power, so as to achieve the optimal 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 power supply can be optimally designed according to the respective rated powers, and therefore, the overall conversion efficiency is better under different use situations. For example, the rated power of the first power output terminal is 60W, the rated power of the second power output terminal is 30W, and the total output power of the power supply is 90W. When a required power of one of the output ports is 20W, the output port provides a second output power of the second power output end; when the required power of one of the output ports is 50W, the output port will provide the first output power of the first power output end, and at this time, the other output port can still provide the power supply of the second power output end 30W of another power-requiring device; when the required power of one of the output ports is 75W, the output port provides 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, thereby providing better conversion efficiency of the power supply in different usage situations; for users, the power supply can also select an output port to connect with the power-requiring device, and obtain an output power supply with better efficiency, thereby improving the operation conversion efficiency of the power supply, improving the use convenience, and overcoming the problem of limited efficiency design and use of the multi-output power supply in the prior art.
Drawings
FIG. 1 is a block diagram of a multi-output power supply according to the present invention.
FIG. 2 is a block diagram of a multi-output power supply according to a preferred embodiment of the present invention.
FIG. 3 is a block diagram of a multi-output power supply according to a preferred embodiment of the present invention.
FIG. 4 is a block diagram of a multi-output power supply according to a preferred embodiment of the present invention.
FIG. 5 is a block diagram of a multi-output power supply according to a preferred embodiment of the present invention.
Fig. 6 and 7 are a flow chart illustrating a power allocation control method according to the present invention.
FIG. 8 is a block diagram of a multi-output power supply according to a preferred embodiment of the present invention.
FIG. 9 is a block diagram of a multi-output power supply according to a preferred embodiment of the present invention.
FIG. 10 is a 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 switch module 20 and a second switch module 30. The power conversion module 10 has a first power output terminal N1 and a second power output terminal 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 output power is outputted from the first power output terminal N1, and the second output power is outputted from the second power output terminal N2, and the rated powers of the first power output terminal N1 and the second power output terminal 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 electrically connected to the first output port O/P1 and the second output port O/P2, respectively, and the first switching module 20 selectively connects the first power output end N1 to one of the first output port O/P1 and the second output port O/P2, or selectively connects or disconnects 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 switch module 30 is electrically connected to the first power output end N1, two output ends of the second switch module 30 are electrically connected to the first output port O/P1 and the second output port O/P2, respectively, and the second switch module 30 selectively connects the second output end N2 to one of the first output port O/P1 and the second output port O/P2, or selectively connects or disconnects the second output end N2 to the first output port O/P1 and the second output port O/P2.
Preferably, the first switch module 20 and the second switch module 30 are respectively disposed with a controllable electronic switch between the first power output end N1, the second power output end N2, 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, the second output port O/P2, and between the second power output end N2 and the first output port O/P1, the second output port O/P2, respectively.
Referring to fig. 2, in more detail, the first switch module 20 includes a first switch SW1 and a second switch SW2, and the second switch module 30 includes a third switch SW3 and a fourth switch SW 4. 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 can be controlled to be conductive or non-conductive (i.e., open) respectively to control the first power output terminal N1 and the second power output terminal N2 to provide output power to the first output port O/P1 or the second output port O/P2 respectively.
Referring to the table I, the first output power P1 and the second output power P2 are controlled to be distributed to the first output port O/P1 and the second output port O/P2 by controlling the conducting and non-conducting (open) states of the first to fourth switches SW 1-SW 4, respectively. Wherein "O" in the columns of the first switch SW1 to the fourth switch SW4 indicates ON, "X" indicates OFF, "P1" in the columns of the first output port O/P1 and the second output port O/P2 indicates that the first output power is provided, "P2" indicates that the second output power is provided, "P1 + P2" indicates the combined output of the first and second output power, and NO indicates that NO output power is provided.
| 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 |
Watch 1
Referring to FIG. 3, preferably, the power supply further includes a control module 40, the control module 40 is electrically connected to the first output port O/P1, the second output port O/P2, the first switch module 20, and the second switch module 30. The control module 40 detects a first required power of the first output port O/P1 and a second required power of the second output port O/P2, and controls the first switching module 20 to selectively turn on/off 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 for the first power output terminal N1, and controls the second switching module 30 to selectively turn on/off one of the first output port O/P1 and the second output port O/P2 for the second power output terminal N2, 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. The control module 40 preferably communicates with a first Power demand device connected to the first output port O/P1 via a Power supply Protocol (PD Protocol) to detect the first demand Power, and also communicates with a second Power demand device connected to the second output port O/P2 via the PD Protocol to detect the first demand Power. The control module 40 can achieve the above-mentioned control by controlling the first to fourth switches SW 4. In an embodiment of the present invention, the control module 40 may be a control chip.
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 the following ways: the first output power P1 is provided to a first output port O/P1 and the second output power P2 is provided to a second output port O/P2, the first output power P1 is provided to a second output port O/P2 and the second output power P2 is provided to a first output port O/P1, the first output power P1 and the second output power P2 are both provided to a first output port O/P1, or the first output power P1 and the second output power P2 are both provided to a second output port O/P2, etc.
Referring to fig. 4, in an 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 converting unit 11 receives an AC input power AC, converts the AC input power AC into a dc power, the first dc voltage transforming unit 12 is electrically connected to the AC/dc converting unit 11 to receive the dc power, converts the dc power into the first output power P1, and outputs the first output power P1 from the first power output terminal N1, and the second dc voltage transforming unit 13 is electrically connected to the AC/dc converting unit 11 to receive the dc power, converts the dc power into the second output power P2, and outputs the second output power P2 from the second power output terminal N2.
As further shown in fig. 5, preferably, the ac/dc converting unit 11 includes a Flyback Converter, the first dc/dc converting unit 12 includes a first Buck Converter 121(Buck Converter) and a first controller 122, and the second dc/dc converting 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 dc power, the first dc transformation unit 12 and the second dc transformation unit 13 convert the dc power into the first output power P1 and the second output power P2, respectively, and the first switching module 20 and the second switching module 30 distribute the first and second output power P1 and P2 to the first and/or second output ports O/P1 and O/P2, respectively, in the power conversion module 10. Therefore, it is not necessary to separately provide an ac/dc conversion unit for each output port, so as to reduce the space added by the isolated converter, and the first dc voltage transforming unit 12 and the second dc voltage transforming unit 13 can be 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 provide better conversion efficiency, and provide a wider range of high conversion efficiency power as a whole. In this 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 the first controller 122 of the first dc voltage unit 12 and the second controller 132 of the second dc voltage unit 13. The first controller 122 is electrically connected to the first output port O/P1 for detecting a first required power of the first output port O/P1, and is electrically connected to the first switch module 20. The second controller 132 is electrically connected to the second output port O/P2 for detecting the second required power of the second output port O/P2, and is electrically connected to the second switch module 30. The first controller 122 and the second controller 132 are electrically connected to each other to communicate and exchange the first required power and the second required power. In this way, the first controller 122 and the second controller 132 both know the first required power and the second required power and respectively control the first switch module 20 and the second switch module 30 accordingly.
The control module 40 in this 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, 132 are directly communicated 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 to control the first and second switching modules 20, 30.
Preferably, the first rated power of the first power output terminal N1 is different from the second rated power of the second dc transforming unit 13. That is, the first dc transforming unit 12 and the second dc transforming unit 13 are optimally designed according to two output powers, so that the power supply has a wider optimal design range. That is, when the power demand device is connected to one of the output ports, such that the output port has a demanded power, the first switching module 20 and the second switching module 30 can select the output power with a rated power higher than and closer to the demanded power to be provided to the one of the output ports. The first rated power is greater than the second rated power, and the first output port O/P1 is connected to the first power demand device to provide a first power demand. It should be noted that when the second output port O/P2 has a second required power, the logic for selecting the output power with the rated power higher than and closer to the required power to provide to the output port is also used to determine and provide the output power to the second output port, which is not described herein again.
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 so, the control module 40 controls the first switch module 20R to conduct the first power output terminal N1 to the first output port O/P1, and controls the second switch 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 smaller than the first rated power and larger 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 not 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; if the first required power is smaller than the second rated power, the control module 40 controls the first switching module 20 to turn off the first power output terminal N1 to the first output port O/P1 and the second output port O/P2, and controls the second switching module 30 to turn on the second power output terminal N2 to the first output port O/P1, i.e. the first required power is provided by the second output power of the second power output terminal.
Referring to fig. 6, to sum up, the power allocation control method of the present invention includes the following steps:
when a first required power of the first output port O/P1 is detected (S101), determining whether the first required power is greater than the first rated power (S102);
if so, conducting the first power output terminal N1 to the first output port O/P1 but not to the second output port O/P2, and conducting the second power output terminal N2 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 larger than the second rated power of the second output end (S104);
if the first required power is less than the first rated power and greater than the second rated power, turning on the first power output terminal N1 to the first output port O/P1 but not to the second output port O/P2, and turning off the second power output terminal N2 to the first output port O/P1 and the second output port O/P2 (S105);
if the first required power is less than the second rated power, the first power output terminal N1 is turned off to the first output port O/P1 and the second output port O/P2, and the second power output terminal N2 is turned on to the first output port O/P1 but is turned off to the second output port O/P2 (S106).
It is assumed that the first power rating of the first power output terminal N1 is 60W, and the first power rating of the second power output terminal N2 is 30W.
In the first usage scenario, when a required power of the first output port O/P1 is less than the second rated power, for example, 20W, the power supply has three possible power distribution options: the first is to conduct the first power output N1 to the first output port O/P1, the second is to conduct the second power output N2 to the first output port O/P1, and the third is to conduct both the first power output N1 and the second power output N2 to the first output port O/P1. From 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 best power correction rate is provided by the second output power source P2. Therefore, the control module 40 controls the second switch module 30 to turn the second power output N2 to the first output port O/P1, and turn the first power output N1 to the first output port O/P1 or the second output port O/P2.
In a second usage scenario, when the first required power 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 options: the first is to conduct both the first power output N1 and the second power output N2 to the first output port O/P1, the second is to conduct only the first power output N1 to the first output port O/P1, while the second power output N2 is not conducted to the first output port O/P1. Since the first rated power of the first power output terminal N1 is sufficient to bear the required power, the simultaneous provision of the second output power P2 of the second power output terminal N2 to the first output port O/P1 results in power waste, which is the second preferred mode. 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 does 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-required device of the second output port O/P2.
Therefore, when the second output port O/P2 is additionally connected to another power-requiring 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, while the second power output terminal N2 and the first output port O/P1 are kept off, 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 switch module 20 and the second switch module 30 of the power supply of the present invention make the output powers of the first power output terminal N1 and the second power output terminal N2 be flexibly distributed, even when the required power of the power demand device connected to one of the output ports is greater than half of the total rated power of the power supply, as long as the required power is still less than one of the rated powers of the larger one of the first and second power output terminals N2, the control module 40 only needs to switch the output power sufficient to provide the required power to provide enough power to either one of the output ports, while the output power of the other power output terminal is still idle and can be used to provide power when the other power demand device is connected to the other output port.
In a third use scenario, when the required power of the first output port O/P1 is greater than the first rated power, for example, 75W, in order to provide sufficient output power, the control module 40 controls the first switch module 20 and the second switch module 30 to turn on the first output port O/P1 at 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 merged and output to the first output port O/P1.
Further, when the first output port O/P1 has a first power demand and the second output port O/P2 has a second power demand, the control module 40 determines whether the first power demand is greater than the second power rating. If so, the control module 40 controls the first switch module 20 to turn on the first power output N1 and the first output port O/P1, and controls the second switch module 30 to turn on the second power output N2 and the second output port O/P2; if not, the control module 40 controls the first switch module 20 to turn on the first power output terminal N1 and the second output port O/P2, and controls the second switch module 30 to turn on the second power output terminal N2 and the first output port O/P1.
Referring to fig. 7, that is, the control method of the present invention further includes 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, conducting the first power output N1 to the first output port O/P1 but not to the second output port O/P2, and conducting the second power output N2 to the second output port O/P2 but not to the first output port O/P1 (S203);
if not, the first power output terminal N1 is conducted to the second output port O/P2 but not to the first output port O/P1, 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 (S204).
In this embodiment, when the first output port O/P1 is connected to a power demand device to have the first demand power, and the second output port O/P2 is connected to another power demand device to have the second demand power, the control module 40 simply compares the first and second demand powers with the rated powers of the first and second power output terminals N1 and N2. Only when the first required power 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 to provide the second output power P2 to the first output port O/P1, so as to avoid the poor efficiency caused by the lower first required power being supplied by the first output power P1 with higher rated power. In other cases, a first output power P1 is provided to the first output port O/P1, and a 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 includes 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 connects the first power output terminal N1 to the second output port O/P2 but not to the first output port O/P1, and the second switch module 30 connects 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; when the first switch module 20 connects the first power output terminal N1 to the first output port O/P1 but not to the second output port O/P2, and the second switch module 30 connects 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 P2 into a basic output power and provides the basic output power to the first output port O/P1.
In the present embodiment, when the required power of one of the output ports is higher than the higher first rated power, and the first and second switching modules 20 and 30 turn on the first and second power output terminals N1 and N2 to supply the required power, the first and second basic power providing units 61 and 62 are used to additionally convert the first output power P1 or the second output power P2 into a lower basic output power, such as a 5V/1A basic output power, and provide the lower basic output power to the other output port, so that the other output port can also have a basic output power, thereby preventing the other output port from completely failing to supply power. That is, in the present embodiment, when one of the output ports has a required power higher than the first rated power, so that both the first and second output power sources P1, P2 are provided to the output port, even when the other output port is connected to another power requiring device, a basic output power is additionally provided to the other output port by the first basic power providing unit 61 or the second basic power providing unit 62 without readjusting the switching states of the first switch module 20 and the second switch 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 switch 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 third power output terminal N3, 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 switch 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 switch 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 switch module 20, the second switch module 30 and the third switch module 40 respectively include three switches electrically connected between the first to third power output terminals N3 and the first to third output ports O/P3, respectively, so as to control the connection or disconnection between the power output terminals and the output ports.
In addition, the power conversion module 10 includes the ac/dc conversion unit 11 and a dc transformation unit corresponding to each power output terminal. For example, in the preferred embodiment of the present invention, a third dc transforming unit 14 is further included. Preferably, the third dc transforming unit 14 includes a buck converter and a controller. The topology of the power converter according to the present invention enables the power conversion module 10 to flexibly expand the design according to the number of power outputs and the output power requirement. The voltage reduction converter has the advantages that the optimal design of each voltage reduction converter can be respectively carried out according to different rated powers of the power output ends, isolated alternating current-direct current conversion is not required to be additionally added, the space utilization is saved, and the overall power conversion efficiency under various different use situations is optimized.
Although the present invention has been described with reference to the preferred embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but may be embodied or carried out by various modifications, equivalents and changes without departing from the spirit and scope of the invention.
Claims (11)
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| WO2024066862A1 (en) * | 2022-09-26 | 2024-04-04 | 深圳市道通合创数字能源有限公司 | Switching method for power modules, and control apparatus and charging pile |
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