CN112039313B - Auxiliary power supply device, control method of auxiliary power supply device, and converter - Google Patents
Auxiliary power supply device, control method of auxiliary power supply device, and converter Download PDFInfo
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- CN112039313B CN112039313B CN202010738708.2A CN202010738708A CN112039313B CN 112039313 B CN112039313 B CN 112039313B CN 202010738708 A CN202010738708 A CN 202010738708A CN 112039313 B CN112039313 B CN 112039313B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
- H02J9/062—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems for AC powered loads
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/0083—Converters characterised by their input or output configuration
Abstract
The application provides an auxiliary power supply device, includes: the power supply comprises a first power supply module, a second power supply module and a switch module; the first power supply module and the second power supply module comprise first input ends; the first power supply module comprises a second input end; the first power supply module and the second power supply module comprise first output ends which are connected with the first necessary load and the second necessary load through the switch module; at least one of the first and second output terminals; the switch module conducts a path between a first output end of the second power supply module and a first necessary load and a second necessary load when a first input end of the second power supply module is powered on and the first power supply module is powered off; when the first power supply module and the second power supply module are powered on, the paths between the first power supply module and the second power supply module and between the first necessary load and the second necessary load are adjusted, so that the necessary loads and the unnecessary loads are powered on. The application also provides a corresponding control method and a converter, and the technical scheme provided by the application is favorable for realizing the high power density of the converter.
Description
Technical Field
The present disclosure relates to power supply technologies, and in particular, to an auxiliary power supply device, a control method of the auxiliary power supply device, and a converter.
Background
The converter needs to be provided with an auxiliary power supply during operation, and the auxiliary power supply is mainly used for supplying power to power-requiring devices (such as a fan, a front-stage and rear-stage control circuit, a relay and the like) in the converter. The loaded power of the auxiliary power supply is closely related to the volume of the auxiliary power supply, and particularly for a circuit of the auxiliary power supply with an isolation transformer, the output power is doubled, and the volume is increased by more than one time.
The high power density of the converter is a trend, on the premise of high power density, a plurality of converters, especially the transformer of the auxiliary power supply, are originally in a power critical state, at the moment, if the power of the auxiliary power supply needs to be increased, the power required by the auxiliary power supply is multiplied at this moment, especially when the power of the existing product in a company is improved and upgraded, or when the auxiliary power supply is designed aiming at a customer in a customized manner, the volume of the auxiliary power supply is multiplied when the power of the existing auxiliary power supply is directly increased, the high power density is not facilitated, and if the auxiliary power supply is redesigned, the development period is lengthened, and the market competition is not facilitated.
Disclosure of Invention
The present application provides an auxiliary power supply device, an auxiliary power supply device control method, and a converter, which are advantageous for realizing high power density of the converter and shortening development cycle.
In order to achieve the above technical effect, a first aspect of the present invention provides an auxiliary power supply device applied to a converter, the auxiliary power supply device including:
the power supply comprises a first power supply module, a second power supply module and a switch module;
the first power supply module and the second power supply module respectively comprise first input ends which are respectively used for being connected to a first power supply and a second power supply; the first power supply module further comprises a second input end which is connected to the converter, and the second input end is powered after the converter is started;
the first power supply module and the second power supply module both comprise first output ends, and the first output ends are connected to a first necessary load and a second necessary load through the switch module; at least one of the first power module and the second power module includes a second output terminal for connecting to an unnecessary load, wherein the first necessary load and the second necessary load are necessary loads necessary for starting the converter, and the unnecessary load is an additional load required for stable operation of the converter;
when the first input end of the second power supply module is powered on and the first power supply module is powered off, the switch module conducts a path between the first output end of the second power supply module and the first necessary load and the second necessary load, so that the necessary load of the converter is powered on; and when the first power supply module and the second power supply module are both powered on, the switch module adjusts a path between the first power supply module and the second power supply module and between the first necessary load and the second necessary load according to the connection condition of the second output end, so that both the necessary load and the unnecessary load of the converter are powered on.
Optionally, the adjusting the paths between the first power module and the second power module and the first necessary load and the second necessary load specifically includes: and turning on a path between the first output terminal of the first power module and the first necessary load, and a path between the first output terminal of the second power module and the second necessary load, and turning off a path between the first output terminal of the first power module and the second necessary load, and a path between the first output terminal of the second power module and the first necessary load.
Optionally, the second power module further includes a second input terminal for connecting to the converter; and the switch module conducts a path between the first output end of the first power supply module and the first and second necessary loads when the first input end of the first power supply module is powered on and the second power supply module is powered off.
Optionally, the converter includes a preceding stage conversion module and a subsequent stage conversion module, the preceding stage conversion module and the subsequent stage conversion module are connected by a dc bus, the second input terminal of the first power supply module is connected to the dc bus, the first necessary load is a load necessary for starting the preceding stage conversion module, and the second necessary load is a load necessary for starting the subsequent stage conversion module.
Optionally, the preceding stage conversion module is a DC/DC module, the subsequent stage conversion module is a DC/AC module, the converter further includes an AC input source, a DC input source and a bypass module, the AC input source is connected to the output terminal of the DC/AC module through the bypass module and serves as the output terminal of the converter, and the DC input source is connected to the DC/AC module sequentially through the DC/DC module and the DC bus;
the first input end of the first power supply module is connected with the alternating current input source, and the first input end of the second power supply module is connected with the direct current input source.
Optionally, the switch module includes:
a first switch, a second switch and a third switch;
a first output end of the first power supply module is connected with the first necessary load through a first switch;
a first output end of the second power supply module is connected with the second necessary load through a third switch;
one end of the second switch is connected to one end of the first switch, and the other end of the second switch is connected to one end of the third switch, where one end of the first switch or the third switch is any one end of the switch.
Optionally, the switch module includes:
a first diode, a second diode, a third diode and a fourth diode;
an anode of the first diode is connected to a first output terminal of the first power module, and a cathode of the first diode is connected to an anode of the second diode, a cathode of the third diode, and the first necessary load, respectively;
an anode of the third diode is connected to the first output terminal of the second power module and an anode of the fourth diode, respectively;
a cathode of the fourth diode is connected to a cathode of the second diode and the second necessary load, respectively;
the third diode and the fourth diode are turned on when the first input end of the second power module is powered on and the first power module is powered off, and the first diode and the second diode are turned off when the first input end of the second power module is powered on and the first power module is powered off;
the first diode and the fourth diode are both turned on when the first power module and the second power module are both powered on, and the second diode and the third diode are both turned off when the first power module and the second power module are both powered on.
A second aspect of the present application provides an auxiliary power supply device control method for controlling an auxiliary power supply to which a converter is applied, the auxiliary power supply device including:
the power supply comprises a first power supply module, a second power supply module and a switch module;
the first power supply module and the second power supply module respectively comprise first input ends which are respectively used for being connected to a first power supply and a second power supply; the first power supply module further comprises a second input end which is connected to the converter, and the second input end is electrified after the converter is started;
the first power supply module and the second power supply module both comprise first output ends, and the first output ends are connected to a first necessary load and a second necessary load through the switch module; at least one of the first power module and the second power module includes a second output terminal for connecting to an unnecessary load, wherein the first necessary load and the second necessary load are necessary loads necessary for starting the converter, and the unnecessary load is an additional load required for stable operation of the converter;
the auxiliary power supply device control method includes:
respectively detecting the power-on states of the first power supply module and the second power supply module;
when the first input end of the second power supply module is powered on and the first power supply module is powered off, controlling the switch module to conduct a path between the first output end of the second power supply module and the first necessary load and the second necessary load, so that the necessary load of the converter is powered on;
when the first power module and the second power module are both powered on, the switch module is controlled to adjust the paths between the first power module and the second power module and the first necessary load and the second necessary load according to the connection condition of the second output end, so that the necessary load and the unnecessary load of the converter are both powered on.
Optionally, the controlling the switch module to adjust a path between the first power module and the second power module and between the first necessary load and the second necessary load specifically includes: and controlling the switch module to conduct a path between the first output end of the first power module and the first necessary load and a path between the first output end of the second power module and the second necessary load, and to disconnect the paths between the first output end of the first power module and the second necessary load and between the first output end of the second power module and the first necessary load.
Optionally, the second power module further includes a second input terminal for connecting to the converter;
the auxiliary power supply device control method further includes: and when the first input end of the first power supply module is powered on and the second power supply module is powered off, controlling the switch module to conduct a path between the first output end of the first power supply module and the first necessary load and the second necessary load.
A third aspect of the present application provides a converter including the auxiliary power supply device of the first aspect or any one of the alternatives of the first aspect.
It can be seen from the above that, the auxiliary power supply device provided in the present application includes a first power module, a second power module and a switch module, where the first power module and the second power module include first output ends, and the first output ends are connected to a first necessary load and a second necessary load through the switch module, and at least one of the first power module and the second power module includes a second output end for connecting to an unnecessary load. When the first input end of the second power supply module is powered on and the first power supply module is powered off, the switch module conducts a path between the first output end of the second power supply module and the first necessary load and the second necessary load, so that the necessary loads of the converter are powered on; when the first power supply module and the second power supply module are both powered on, the paths between the first power supply module and the second power supply module and between the first necessary load and the second necessary load are adjusted according to the connection condition of the second output end, so that the necessary loads and the unnecessary loads of the converter are both powered on, and the high power density and the development period of the converter are favorably realized.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
Fig. 1 is a schematic structural diagram of an auxiliary power supply device according to an embodiment of the present disclosure;
FIG. 2 is a schematic diagram of a converter according to an embodiment of the present application;
fig. 3 is a schematic structural diagram of an auxiliary power supply device according to an embodiment of the present disclosure;
fig. 4 is a schematic structural diagram of an auxiliary power supply device according to an embodiment of the present disclosure;
fig. 5 is a flowchart of a control method of an auxiliary power supply device according to an embodiment of the present application;
fig. 6 is a schematic structural diagram of an electronic device according to an embodiment of the present application.
Detailed Description
In the following description, for purposes of explanation and not limitation, specific details are set forth, such as particular system structures, techniques, etc. in order to provide a thorough understanding of the embodiments of the present application. It will be apparent, however, to one skilled in the art that the present application may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present application with unnecessary detail.
It will be understood that the terms "comprises" and/or "comprising," when used in this specification and the appended claims, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
It is also to be understood that the terminology used in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in the specification of the present application and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
It should be further understood that the term "and/or" as used in this specification and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.
As used in this specification and the appended claims, the term "if" may be interpreted contextually as "when …" or "upon" or "in response to a determination" or "in response to a detection". Similarly, the phrase "if it is determined" or "if a [ described condition or event ] is detected" may be interpreted depending on the context to mean "upon determining" or "in response to determining" or "upon detecting [ described condition or event ]" or "in response to detecting [ described condition or event ]".
The technical solutions in the embodiments of the present application are clearly and completely described below with reference to the drawings of the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
In the embodiments of the present application, the same or similar reference numerals denote the same or similar modules or modules having the same or similar functions throughout. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application, but the present application may be practiced in other ways than those described herein, and it will be apparent to those of ordinary skill in the art that the present application is not limited by the specific embodiments disclosed below.
As shown in fig. 1, a first aspect of the embodiments of the present application provides an auxiliary power supply device 1 applied to an inverter (not shown in the drawings), where the auxiliary power supply device 1 includes: a first power module 11, a second power module 12 and a switch module 13. The first power module 11 and the second power module 12 each include a first input terminal for connecting to a first power supply (not shown) and a second power supply (not shown), respectively. In this embodiment, the first input end 111 of the first power module 11 is configured to be connected to the first power supply, and the first input end 121 of the second power module 12 is configured to be connected to the second power supply. The first power module 11 further comprises a second input terminal 112 for connecting to the inverter, and the second input terminal is powered 112 after the inverter is started.
The first power module 11 and the second power module 12 each include a first output terminal, and the first output terminals are connected to the first necessary load 2 and the second necessary load 3 through the switch module 13; at least one of the first power module 11 and the second power module 12 includes a second output terminal for connecting to an unnecessary load 4, wherein the first necessary load 2 and the second necessary load 3 are necessary loads necessary for starting the inverter, and the unnecessary load 4 is an additional load required for stable operation of the inverter. In this embodiment, the second power module 12 includes a second output terminal for connecting to the unnecessary load 4. Optionally, the first power module 11 and the power module 12 both include a second output terminal for connecting to different ones of the unnecessary loads 4, respectively.
When the first input terminal 121 of the second power module 12 is powered on and the first power module 11 is powered off, the switch module 13 turns on a path between the first output terminal of the second power module 12 and the first and second essential loads 2 and 3, so that the essential load of the inverter is powered on; therefore, when the first power supply module 11 is powered down, the second power supply module 12 is used for charging necessary loads, and the converter can still be started.
When the first power module 11 and the second power module 12 are both powered on, the switch module 13 adjusts the paths between the first power module 11 and the second power module 12 and the first necessary load 2 and the second necessary load 3 according to the connection condition of the second output terminal, so that both necessary loads and unnecessary loads of the inverter are powered on.
In an application scenario, the adjusting the paths between the first power module 11 and the second power module 12 and the first necessary load 2 and the second necessary load 3 specifically includes: the first output terminal of the first power module 11 is connected to the first necessary load 2, and the first output terminal of the second power module 12 is connected to the second necessary load 3, and the first output terminal of the first power module 11 is connected to the second necessary load 3, and the first output terminal of the second power module 12 is connected to the first necessary load 2. When both the first power module 11 and the second power module 12 are powered, the first power module 11 supplies power to the first necessary load 2, and the second power module 12 supplies power to the second necessary load 3. Compared with the prior art, the output power required to be provided by the first ends of the first power module 11 and the second power module 12 is reduced under the condition of maintaining the normal start and operation of the converter, thereby being beneficial to high power density.
In another application scenario, the adjusting the paths between the first power module 11 and the second power module 12 and the first necessary load 2 and the second necessary load 3 includes: the first output terminal of the first power module 11 and the second necessary load 3 are turned on, and the first output terminal of the second power module 12 and the first necessary load 2 are turned off, and the first output terminal of the first power module 11 and the first necessary load 2, and the first output terminal of the second power module 12 and the second necessary load 3 are turned off.
In this embodiment, the second power module 12 further includes a second input terminal 122 for connecting to the inverter; the switch module 13 turns on a path between the first output terminal of the first power module 11 and the first and second loads 2 and 3 when the first input terminal of the first power module 11 is powered on and the second power module 12 is powered off; therefore, when the second power supply module 12 is powered off, the first power supply module 11 supplies power to necessary loads, and the converter can still be started.
A schematic configuration diagram of an inverter provided in this embodiment is shown in fig. 2, the inverter includes a preceding-stage inverter module 51 and a succeeding-stage inverter module 52, the preceding-stage inverter module and the succeeding-stage inverter module are connected via a dc bus 53, a second input terminal 112 of the first power module 11 is connected to the dc bus 53, the first necessary load 2 is a load necessary for starting the preceding-stage inverter module 51, and the second necessary load 3 is a load necessary for starting the succeeding-stage inverter module 52. The former stage conversion module is a DC/DC module, and the latter stage conversion module is a DC/AC module. In this embodiment, the inverter further includes an AC input source 54, a DC input source 55, and a bypass module 56, the AC input source 54 is connected to an output terminal of the DC/AC module through the bypass module 56 and serves as an output terminal of the inverter, and the DC input source 55 is connected to the DC/AC module through the DC/DC module and the DC bus 53 in this order. The first input terminal of the first power module 11 is connected to the ac input source 54, and the first input terminal of the second power module 12 is connected to the dc input source 55.
Further, the first stage conversion module 51 includes a first necessary load 2 necessary for starting and an unnecessary load 4 necessary for stable operation, and the second stage conversion module 52 also includes a second necessary load 3 necessary for starting and an unnecessary load 4 necessary for stable operation, and the unnecessary loads 4 of the first stage conversion module 51 and the second stage conversion module 52 are connected to the first power supply module 11 and the second power supply module 12, respectively. Thus, when the first power module 11 and the second power module 12 are powered on at the same time, the first power module 11 and the second power module 12 independently supply power to the DC/DC module and the DC/DA module, respectively, which is beneficial to realizing high power density of the converter. When only one of the first power module 11 and the second power module 12 is powered, the DC/DC module and the DC/AC module are powered by the powered power module, so that the converter can be started. When the first power module 11 is powered off and the inverter is started, the dc bus 53 is powered on, so that the first power module 11 is powered on through the second input terminal 112, and the first power module 11 can run normally.
Optionally, the unnecessary load 4 includes a fan, an isolation sampling module, and a relay module in the converter, and may further include other loads that are unnecessary when the converter is started but require additional loads when the relay is stably operated, which is not specifically limited herein.
In an application scenario, as shown in fig. 3, the switch module 13 includes: a first switch 131, a second switch 132, and a third switch 133; a first output terminal of the first power module 11 is connected to the first necessary load 2 through a first switch 131; a first output terminal of the second power module 12 is connected to the second necessary load 3 through a third switch 133; one end of the second switch 132 is connected to one end of the first switch 131, and the other end of the second switch 132 is connected to one end of the third switch 133, where one end of the first switch 131 or the third switch 133 is any one end of the switch. When the first input terminal of the second power module 12 is powered on and the first power module 11 is powered off, the switch module 13 turns on the second switch 132 and the third switch 133 to power on the necessary load of the inverter; when both the first power module 11 and the second power module 12 are powered on, the switch module 13 turns off the second switch 132 and turns on the first switch 131 and the second switch 132, so that both the necessary load and the unnecessary load of the inverter are powered on.
Alternatively, both ends of the second switch 132 may be connected to a connection point between the first switch 131 and the first output terminal of the first power module 11, and a connection point between the third switch 133 and the second necessary load, respectively; may be connected to a connection point between the first switch 131 and the first necessary load, and a connection point between the third switch 133 and the first output terminal of the second power module 12; a connection point between the first switch 131 and the first output terminal of the first power module 11, and a connection point between the third switch 133 and the first output terminal of the second power module 12 may be connected; the switch module 13 may further include other switches to implement the same function corresponding to other connection modes, and is not limited herein.
In another application scenario, as shown in fig. 4, the switch module 13 includes: a first diode 134, a second diode 135, a third diode 136, and a fourth diode 137; an anode of the first diode 134 is connected to a first output terminal of the first power module 11, and a cathode of the first diode 134 is connected to an anode of the second diode 135, a cathode of the third diode 136, and the first required load 2, respectively; an anode of the third diode 136 is connected to the first output terminal of the second power module 12 and an anode of the fourth diode 137, respectively; a cathode of the fourth diode 137 is connected to a cathode of the second diode 135 and the second necessary load 3, respectively. The third diode 136 and the fourth diode 137 are turned on when the first input terminal of the second power module 12 is powered on and the first power module 11 is powered off, and the first diode 134 and the second diode 135 are turned off when the first input terminal of the second power module 12 is powered on and the first power module 11 is powered off. The first diode 134 and the fourth diode 137 are both turned on when both the first power module 11 and the second power module 12 are powered, and the second diode 135 and the third diode 136 are both turned off when both the first power module 11 and the second power module 12 are powered. Optionally, when the first power module 11 and the second power module 12 are both powered on, an absolute value of a voltage difference between the first output terminal of the first power module 11 and the first output terminal of the second power module 12 is smaller than a preset voltage threshold, where the preset voltage threshold is smaller than turn-on voltages of the second diode 135 and the third diode 136. In this embodiment, when the first power module 11 and the second power module 12 are both powered on, a voltage difference between the first output terminal of the first power module 11 and the first output terminal of the second power module 12 is set to be 0. In addition, a second diode 135 and a third diode 136 having different conduction voltage drops may be selected, or a plurality of second diodes 135 or a plurality of third diodes 136 may be connected in series, so that both the second diode 135 and the third diode 136 are turned off when both the first power module 11 and the second power module 12 are powered on.
Alternatively, the switch module 13 may also have other implementation manners, such as using a suitable switch tube to replace the diode and controlling the switch tube to implement the above function, which is not limited herein.
As can be seen from the above, the auxiliary power supply device 1 provided in the present application includes a first power module 11, a second power module 12 and a switch module 13, wherein the first power module 11 and the second power module 12 each include a first output end, the first output ends are connected to the first necessary load 2 and the second necessary load 3 through the switch module 13, and at least one of the first power module 11 and the second power module 12 includes a second output end for connecting to the unnecessary load 4.
On the one hand, when the first input terminal of the second power module 12 is powered on and the first power module 11 is powered off, the switch module 13 turns on the path between the first output terminal of the second power module 12 and the first and second necessary loads 2 and 3, so that the necessary load of the converter is powered on, and the converter can be started successfully.
On the other hand, when the first power module 11 and the second power module 12 are both powered on, the switch module 13 adjusts the paths between the first power module 11 and the second power module 12 and the first necessary load 2 and the second necessary load 3 according to the connection condition of the second output terminal, so that the necessary loads and the unnecessary loads of the converter are both powered on, and the converter can normally operate.
Compared with the prior art, the auxiliary power supply device provided by the application can reasonably distribute input sources for necessary loads and unnecessary loads in the converter under different power-on conditions of the auxiliary power supply device, and is favorable for realizing high power density of the converter. And the secondary development can be carried out on the existing power supply, which is beneficial to shortening the development period.
A second aspect of the embodiments of the present application provides a control method for an auxiliary power supply apparatus, which is used for controlling the auxiliary power supply apparatus, the auxiliary power supply apparatus being applied to a converter, and the auxiliary power supply apparatus including: the power supply comprises a first power supply module, a second power supply module and a switch module;
the first power supply module and the second power supply module respectively comprise first input ends which are respectively used for being connected to a first power supply and a second power supply; the first power supply module further comprises a second input end which is connected to the converter, and the second input end is electrified after the converter is started;
the first power supply module and the second power supply module both comprise first output ends, and the first output ends are connected to a first necessary load and a second necessary load through the switch module; at least one of the first power module and the second power module includes a second output terminal for connecting to an unnecessary load, wherein the first necessary load and the second necessary load are necessary loads necessary for starting the inverter, and the unnecessary load is an additional load required for stable operation of the inverter. Optionally, the first power module and the power module each include a second output terminal for connecting to different ones of the unnecessary loads, respectively.
As shown in fig. 5, the auxiliary power supply device control method includes:
In an application scenario, in step 503, the controlling the switch module to adjust a path between the first power module and the second power module and the first necessary load and the second necessary load specifically includes: and controlling the switch module to conduct a path between the first output end of the first power module and the first necessary load and a path between the first output end of the second power module and the second necessary load, and to disconnect the paths between the first output end of the first power module and the second necessary load and between the first output end of the second power module and the first necessary load. When the first power module and the second power module are powered on, the first power module supplies power to the first necessary load, and the second power module supplies power to the second necessary load. Compared with the prior art, under the condition of maintaining normal starting and operation of the converter, the output power required to be provided by the first ends of the first power supply module and the second power supply module is reduced, so that high power density is facilitated.
In another application scenario, in step 503, the controlling the switch module to adjust a path between the first power module and the second power module and the first necessary load and the second necessary load specifically includes: and controlling the switch module to turn on the paths between the first output terminal of the first power module 11 and the second necessary load 3 and between the first output terminal of the second power module 12 and the first necessary load 2, and turn off the paths between the first output terminal of the first power module 11 and the first necessary load 2 and between the first output terminal of the second power module 12 and the second necessary load 3.
Optionally, the second power module further includes a second input terminal for connecting to the converter; the auxiliary power supply device control method further includes: when the first input end of the first power supply module is powered on and the second power supply module is powered off, controlling the switch module to conduct a path between the first output end of the first power supply module and the first necessary load and the second necessary load; therefore, when the second power supply module is powered off, the first power supply module supplies power to a necessary load, and the converter can still be started.
The converter provided in this embodiment includes a preceding-stage conversion module and a succeeding-stage conversion module, the preceding-stage conversion module and the succeeding-stage conversion module are connected by a dc bus, a second input terminal of the first power supply module is connected to the dc bus, the first necessary load is a load necessary for starting the preceding-stage conversion module, and the second necessary load is a load necessary for starting the succeeding-stage conversion module. The former stage conversion module is a DC/DC module, and the latter stage conversion module is a DC/AC module. In this embodiment, the converter further includes an AC input source, a DC input source, and a bypass module, the AC input source is connected to the output terminal of the DC/AC module through the bypass module and serves as the output terminal of the converter, and the DC input source is connected to the DC/AC module through the DC/DC module and the DC bus in sequence. The first input end of the first power supply module is connected with the alternating current input source, and the first input end of the second power supply module is connected with the direct current input source.
In the control method of the auxiliary power supply device, when the first power supply module and the second power supply module are powered on simultaneously, the first power supply module and the second power supply module are controlled to independently supply power to the DC/DC module and the DC/DA module respectively, so that the high power density of the converter is favorably realized. When only one of the first power supply module and the second power supply module is electrified, the electrified power supply module is controlled to simultaneously supply power to the DC/DC module and the DC/AC module, and the converter can be started. And when the first power supply module is powered off, the converter is started, and then the direct current bus is powered on, so that the first power supply module is powered on through the second input end, and the first power supply module can normally run.
Optionally, the unnecessary load includes the fan, the isolation sampling module and the relay module in the converter, and may further include other loads that are unnecessary when the converter is started but require additional load when the relay operates stably, which is not specifically limited herein.
In this embodiment, the switch module includes: a first switch, a second switch and a third switch; a first output end of the first power supply module is connected with the first necessary load through a first switch; a first output end of the second power supply module is connected with the second necessary load through a third switch; one end of the second switch is connected to one end of the first switch, and the other end of the second switch is connected to one end of the third switch, where one end of the first switch or the third switch is any one end of the switch. The control method of the auxiliary power supply device is specifically configured to control the switch module to turn on the second switch and the third switch when the first input terminal of the second power supply module is powered on and the first power supply module is powered off, so that a necessary load of the converter is powered on; and controlling the switch module to disconnect the second switch and to conduct the first switch and the second switch when the first power supply module and the second power supply module are both powered on, so that the necessary load and the unnecessary load of the converter are both powered on. As can be seen from the above, the control method of an auxiliary power supply device provided in the present application is used for controlling an auxiliary power supply device, where the auxiliary power supply device is applied to a converter and includes a first power supply module, a second power supply module, and a switch module, where the first power supply module and the second power supply module both include first output ends, the first output ends are both connected to a first necessary load and a second necessary load through the switch module, and at least one of the first power supply module and the second power supply module includes a second output end for connecting to a non-necessary load.
Optionally, two ends of the second switch may be connected to a connection point between the first switch and the first output terminal of the first power module, and a connection point between the third switch and the second necessary load, respectively; the third switch may be connected to a connection point of the first switch and the first necessary load and a connection point of the third switch and the first output terminal of the second power module, respectively; the first switch may be connected to a connection point of the first switch and the first output terminal of the first power supply module, and the third switch may be connected to a connection point of the first switch and the first output terminal of the second power supply module; the switch module may further include other switches, which correspond to other connection modes to achieve the same function, and is not limited specifically herein.
On one hand, the control method of the auxiliary power supply device controls the switch module to conduct a path between the first output end of the second power supply module and the first necessary load and the second necessary load when the first input end of the second power supply module is powered on and the first power supply module is powered off, so that the necessary load of the converter is powered on, and the converter can be started successfully.
On the other hand, the control method of the auxiliary power supply device controls the switch module to adjust the paths between the first power supply module and the second power supply module and the first necessary load and the second necessary load according to the connection condition of the second output end when the first power supply module and the second power supply module are both powered on, so that the necessary load and the unnecessary load of the converter are both powered on, and the converter can normally operate.
Compared with the prior art, the control method of the auxiliary power supply device can reasonably distribute the input sources for necessary loads and unnecessary loads in the converter under different power-on conditions of the auxiliary power supply device, and is favorable for realizing high power density of the converter. And the auxiliary power supply device can be developed for the second time on the existing power supply, thereby being beneficial to shortening the development period.
A third aspect of the embodiments of the present application provides a converter including any one of the auxiliary power supply apparatuses provided in the first aspect of the embodiments of the present application. The auxiliary power supply device comprises a first power supply module, a second power supply module and a switch module. The first power supply module and the second power supply module both comprise first input ends which are respectively used for being connected to a first power supply and a second power supply. The first power supply module further comprises a second input end, and the second input end is powered after the converter is started.
The first power supply module and the second power supply module both comprise first output ends, and the first output ends are connected to a first necessary load and a second necessary load through the switch module; at least one of the first power module and the second power module includes a second output terminal for connecting to an unnecessary load, wherein the first necessary load and the second necessary load are necessary loads necessary for starting the inverter, and the unnecessary load is an additional load required for stable operation of the inverter. In this embodiment, the second power module includes a second output terminal for connecting to the unnecessary load. Optionally, the first power module and the power module each include a second output terminal for connecting to different ones of the unnecessary loads, respectively.
When the first input end of the second power supply module is powered on and the first power supply module is powered off, the switch module conducts a path between the first output end of the second power supply module and the first necessary load and the second necessary load, so that the necessary load of the converter is powered on; therefore, when the first power supply module is powered off, the second power supply module is used for charging necessary loads, and the converter can still be started.
And when the first power supply module and the second power supply module are both powered on, the switch module adjusts a path between the first power supply module and the second power supply module and between the first necessary load and the second necessary load according to the connection condition of the second output end, so that both the necessary load and the unnecessary load of the converter are powered on.
Other specific details of the auxiliary power supply device in the converter may correspond to those of the auxiliary power supply device provided in the first aspect of the present application, and are not described herein again.
From the above, the converter provided by the present application includes an auxiliary power supply device. The auxiliary power supply device comprises a first power supply module, a second power supply module and a switch module, wherein the first power supply module and the second power supply module respectively comprise a first output end, the first output ends are connected to a first necessary load and a second necessary load through the switch module, and at least one of the first power supply module and the second power supply module comprises a second output end which is used for being connected to a non-necessary load. When the first input end of the second power supply module is powered on and the first power supply module is powered off, the switch module conducts a path between the first output end of the second power supply module and the first necessary load and the second necessary load, so that the necessary loads of the converter are powered on; when the first power supply module and the second power supply module are both powered on, the paths between the first power supply module and the second power supply module and between the first necessary load and the second necessary load are adjusted according to the connection condition of the second output end, so that the necessary loads and the unnecessary loads of the converter are both powered on, and the high power density and the development period of the converter are favorably realized.
A fourth aspect of the present embodiment provides an electronic device, as shown in fig. 6, where the electronic device includes a memory 601 and a processor 602, the memory 601 and the processor 602 are connected by a bus 603, the memory 601 stores a computer program, and the processor 602 implements any one of the steps of the auxiliary power supply device control method when executing the computer program.
A fifth aspect of embodiments of the present application provides a computer-readable storage medium, on which a computer program is stored, the computer program, when executed by a processor, implementing any of the above-described steps applied to a control method of an auxiliary power supply device.
It should be understood that the execution sequence of each process in the above embodiments should be determined by the function and the inherent logic thereof, and should not constitute any limitation to the implementation process of the embodiments of the present application.
It will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-mentioned division of the functional units and modules is illustrated, and in practical applications, the above-mentioned functions may be distributed as different functional units and modules according to needs, that is, the internal structure of the apparatus may be divided into different functional units or modules to implement all or part of the above-mentioned functions. Each functional unit and module in the embodiments may be integrated in one processing unit, or each unit may exist alone physically, or two or more units are integrated in one unit, and the integrated unit may be implemented in a form of hardware, or in a form of software functional unit. In addition, specific names of the functional units and modules are only for convenience of distinguishing from each other, and are not used for limiting the protection scope of the present application. The specific working processes of the units and modules in the system may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the above embodiments, the descriptions of the respective embodiments have respective emphasis, and reference may be made to the related descriptions of other embodiments for parts that are not described or illustrated in a certain embodiment.
Those of ordinary skill in the art would appreciate that the elements and algorithm steps of the examples described in connection with the embodiments disclosed herein may be implemented as electronic hardware, or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.
In the embodiments provided in the present application, it should be understood that the disclosed apparatus/terminal device and method may be implemented in other ways. For example, the above-described embodiments of the apparatus/terminal device are merely illustrative, and for example, the division of the above modules or units is only one logical division, and the actual implementation may be implemented by another division, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed.
The integrated modules/units described above, if implemented in the form of software functional units and sold or used as separate products, may be stored in a computer readable storage medium. Based on such understanding, all or part of the flow in the method of the embodiments described above may be implemented by a computer program, which may be stored in a computer-readable storage medium and can implement the steps of the embodiments of the methods described above when the computer program is executed by a processor. The computer program includes computer program code, and the computer program code may be in a source code form, an object code form, an executable file or some intermediate form. The computer readable medium may include: any entity or device capable of carrying the above-mentioned computer program code, recording medium, usb disk, removable hard disk, magnetic disk, optical disk, computer Memory, Read-Only Memory (ROM), Random Access Memory (RAM), electrical carrier wave signal, telecommunication signal, software distribution medium, etc. It should be noted that the contents contained in the computer-readable storage medium can be increased or decreased as required by legislation and patent practice in the jurisdiction.
The above-mentioned embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art; the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the embodiments of the present application, and they should be construed as being included therein.
Claims (8)
1. An auxiliary power supply device applied to a converter, the auxiliary power supply device comprising:
the power supply comprises a first power supply module, a second power supply module and a switch module;
the first power supply module and the second power supply module respectively comprise first input ends which are respectively used for being connected to a first power supply and a second power supply; the first power supply module further comprises a second input end which is connected to the converter, and the second input end is powered after the converter is started;
the first power supply module and the second power supply module both comprise first output ends, and the first output ends are connected to a first necessary load and a second necessary load through the switch module; at least one of the first power supply module and the second power supply module comprises a second output end for connecting to an unnecessary load, wherein the first necessary load and the second necessary load are necessary loads necessary for starting the converter, and the unnecessary load is an additional load required for stable operation of the converter;
when the first input end of the second power supply module is powered on and the first power supply module is powered off, the switch module conducts a path between the first output end of the second power supply module and the first necessary load and the second necessary load, so that the necessary loads of the converter are powered on; when the first power supply module and the second power supply module are powered on, the switch module adjusts paths between the first power supply module and the second power supply module and between the first necessary load and the second necessary load according to the connection condition of the second output end, so that the necessary loads and the unnecessary loads of the converter are powered on;
the adjusting the paths between the first power module and the second power module and the first necessary load and the second necessary load specifically includes: and turning on a path between the first output end of the first power supply module and the first necessary load, and a path between the first output end of the second power supply module and the second necessary load, and turning off a path between the first output end of the first power supply module and the second necessary load, and a path between the first output end of the second power supply module and the first necessary load.
2. The auxiliary power supply apparatus of claim 1, wherein said second power module further comprises a second input for connection to said converter; and the switch module conducts a path between the first output end of the first power supply module and the first necessary load and the second necessary load when the first input end of the first power supply module is electrified and the second power supply module is powered off.
3. An auxiliary power supply apparatus according to claim 1 or 2, wherein the inverter includes a preceding-stage inverter module and a succeeding-stage inverter module, the preceding-stage inverter module and the succeeding-stage inverter module are connected by a dc bus, the second input terminal of the first power supply module is connected to the dc bus, the first necessary load is a load necessary for starting the preceding-stage inverter module, and the second necessary load is a load necessary for starting the succeeding-stage inverter module.
4. An auxiliary power supply unit as claimed in claim 3, wherein said preceding stage conversion module is a DC/DC module and said succeeding stage conversion module is a DC/AC module, and said converter further comprises an AC input source, a DC input source, and a bypass module, said AC input source being connected to an output terminal of said DC/AC module through said bypass module and serving as an output terminal of said converter, said DC input source being connected to said DC/AC module sequentially through said DC/DC module and said DC bus;
the first input end of the first power supply module is connected with the alternating current input source, and the first input end of the second power supply module is connected with the direct current input source.
5. The auxiliary power supply apparatus as claimed in claim 1, wherein the switching module includes:
a first switch, a second switch and a third switch;
a first output end of the first power supply module is connected with the first necessary load through a first switch;
the first output end of the second power supply module is connected with the second necessary load through a third switch;
one end of the second switch is connected with one end of the first switch, and the other end of the second switch is connected with one end of the third switch, wherein one end of the first switch or the third switch is any end of the switch.
6. The auxiliary power supply apparatus as claimed in claim 1, wherein the switching module includes:
a first diode, a second diode, a third diode and a fourth diode;
the anode of the first diode is connected with the first output end of the first power supply module, and the cathode of the first diode is respectively connected with the anode of the second diode, the cathode of the third diode and the first necessary load;
the anode of the third diode is respectively connected with the first output end of the second power supply module and the anode of the fourth diode;
a cathode of the fourth diode is connected to a cathode of the second diode and the second necessary load, respectively;
the third diode and the fourth diode are conducted when the first input end of the second power supply module is powered on and the first power supply module is powered off, and the first diode and the second diode are cut off when the first input end of the second power supply module is powered on and the first power supply module is powered off;
the first diode and the fourth diode are both turned on when the first power supply module and the second power supply module are both powered on, and the second diode and the third diode are both turned off when the first power supply module and the second power supply module are both powered on.
7. An auxiliary power supply device control method for controlling an auxiliary power supply device applied to a converter, the auxiliary power supply device comprising:
the power supply comprises a first power supply module, a second power supply module and a switch module;
the first power supply module and the second power supply module respectively comprise first input ends which are respectively used for being connected to a first power supply and a second power supply; the first power supply module further comprises a second input end which is connected to the converter, and the second input end is electrified after the converter is started;
the first power supply module and the second power supply module both comprise first output ends, and the first output ends are connected to a first necessary load and a second necessary load through the switch module; at least one of the first power supply module and the second power supply module comprises a second output end for connecting to an unnecessary load, wherein the first necessary load and the second necessary load are necessary loads necessary for starting the converter, and the unnecessary load is an additional load required for stable operation of the converter;
the auxiliary power supply device control method includes:
respectively detecting the power-on states of the first power supply module and the second power supply module;
when the first input end of the second power supply module is powered on and the first power supply module is powered off, controlling the switch module to conduct a path between the first output end of the second power supply module and the first necessary load and the second necessary load, so that the necessary loads of the converter are powered on;
when the first power supply module and the second power supply module are powered on, controlling the switch module to adjust the paths between the first power supply module and the second power supply module and between the first necessary load and the second necessary load according to the connection condition of the second output end, so that the necessary loads and the unnecessary loads of the converter are powered on;
the controlling the switch module to adjust paths between the first power supply module and the second power supply module and between the first essential load and the second essential load specifically includes: and controlling the switch module to conduct the paths between the first output end of the first power supply module and the first necessary load and between the first output end of the second power supply module and the second necessary load, and to disconnect the paths between the first output end of the first power supply module and the second necessary load and between the first output end of the second power supply module and the first necessary load.
8. A converter, characterized by comprising an auxiliary power supply device according to any one of claims 1 to 6.
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| CN113241751B (en) * | 2021-04-20 | 2023-03-28 | 青岛易来智能科技股份有限公司 | Power supply circuit |
| CN117810949A (en) * | 2022-09-30 | 2024-04-02 | 深圳海翼智新科技有限公司 | Power supply control circuit and equipment |
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