CN218449592U - Power supply parallel operation control circuit and device - Google Patents
Power supply parallel operation control circuit and device Download PDFInfo
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- CN218449592U CN218449592U CN202221658102.9U CN202221658102U CN218449592U CN 218449592 U CN218449592 U CN 218449592U CN 202221658102 U CN202221658102 U CN 202221658102U CN 218449592 U CN218449592 U CN 218449592U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/20—End-user application control systems
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Abstract
The utility model discloses a power supply parallel operation control circuit and a device, which relate to the technical field of power supply control, wherein the power supply parallel operation control circuit comprises a power supply switching module, outputs a first switching signal according to a received switching control signal, and outputs a second switching signal after a preset time; the first switching module controls the self to be cut off according to the second switching signal; the second switch module controls the one-way conduction of the second switch module according to the first switching signal; the third switching module is used for controlling self conduction according to the first switching signal; and the fourth switching module controls the self-conduction according to the second switching signal. The utility model discloses the power supply of load is switching to the in-process of second power from first power, through the state of two switch module in the power of power switching module difference control every group, remains power supply throughout and does not fall the electricity, has realized that the power falls the electricity and switches, has solved many powers and has given the load power supply in-process, how to realize the zero technical problem who falls the electricity and switch.
Description
Technical Field
The utility model relates to a power control technology field especially relates to a power parallel operation control circuit and device.
Background
At present, the control mode of the power supply parallel operation in the market is as follows: when a main power supply is powered off or the voltage is insufficient, the standby power supply is switched to supply power, but the power is lost for about 100ms at the switching moment, so that the problem of how to realize zero power failure switching of the power supply needs to be solved urgently.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a main aim at: the utility model provides a power supply parallel operation control circuit and device, aims at solving the technical problem of how to realize zero power down switching in the process of multi-power supply supplying power to a load.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
in a first aspect, the utility model provides a power supply parallel operation control circuit, power supply parallel operation control circuit includes:
the power supply switching module is used for outputting a first switching signal according to the received switching control signal and outputting a second switching signal after preset time;
the first switch module is respectively connected with the first power supply and the power supply switching module and is used for controlling the self-stop according to the second switching signal;
the second switch module is respectively connected with the first switch module, the power supply switching module and the load and is used for controlling the unidirectional conduction of the second switch module according to the first switching signal;
the third switch module is respectively connected with the second power supply and the power supply switching module and is used for controlling the self conduction according to the first switching signal;
and the fourth switch module is respectively connected with the third switch module, the power supply switching module and the load and used for controlling the self conduction according to the second switching signal.
Optionally, the power supply parallel operation control circuit further includes:
and the switching control module is connected with the power switching module and used for generating a switching control signal according to any one of the working temperature of the first power supply, the output voltage of the first power supply, manual switching operation or a preset period and outputting the switching control signal.
Optionally, the power switching module includes:
the micro control unit is used for outputting a first switching signal according to the switching control signal and outputting a second switching signal after preset time;
the first driving unit is respectively connected with the micro control unit, the first switch module and the second switch module and is used for controlling the second switch module to be in one-way conduction according to the first switching signal and controlling the first switch module to be cut off according to the second switching signal;
and the second driving unit is respectively connected with the micro control unit, the third switch module and the fourth switch module and is used for controlling the conduction of the third switch module according to the first switching signal and controlling the conduction of the fourth switch module according to the second switching signal.
Optionally, the first drive unit comprises:
the input end of the first driving circuit is connected with the micro control unit, and the output end of the first driving circuit is connected with the first switch module and used for controlling the first switch module to be cut off according to a second switching signal;
and the input end of the second driving circuit is connected with the micro control unit, and the output end of the second driving circuit is connected with the second switch module and used for controlling the second switch module to be in one-way conduction according to the first switching signal.
Optionally, the micro control unit comprises a microcontroller U3;
and a sixth pin of the microcontroller U3 is connected with the second drive circuit, and a nineteenth pin of the microcontroller U3 is connected with the first drive circuit.
Optionally, the first driving circuit and the second driving circuit each include any one of a photocoupler, a driver, a field effect transistor, or a triode.
Optionally, the first drive circuit comprises a photo coupler U1;
the first pin of photoelectric coupler U1 passes through resistance R1 and is connected with microcontroller U3's nineteenth pin, and the second pin ground connection, the third pin is connected with diode D1's positive pole, and the fourth pin is connected with first power, and diode D1's negative pole passes through resistance R3 and is connected with first switch module.
Optionally, the first switching module comprises a first switching element, and the second switching module comprises a second switching element and a diode connected in parallel;
one end of the first switch element is connected with the anode of the first power supply, the other end of the first switch element is respectively connected with one end of the second switch element and the anode of the diode, and the other end of the second switch element and the cathode of the diode are connected with the anode of the load;
or one end of the first switch element is connected with the negative electrode of the first power supply, the other end of the first switch element is respectively connected with one end of the second switch element and the negative electrode of the diode, and the other end of the second switch element and the positive electrode of the diode are connected with the negative electrode of the load.
Optionally, the first switch module includes a field effect transistor Q1, and the second switch module includes a field effect transistor Q2;
the grid electrode of the field effect transistor Q1 is connected with the first driving circuit, the source electrode is connected with the negative electrode of the first power supply, the grid electrode of the field effect transistor Q1 is connected with the grid electrode of the field effect transistor Q1 through the resistor R5, the positive electrode of the voltage stabilizing diode D3 is connected with the negative electrode of the voltage stabilizing diode D3, the grid electrode of the field effect transistor Q1 is connected with the drain electrode of the field effect transistor Q1 through the capacitor C1, and the drain electrode of the field effect transistor Q1 is connected with the source electrode of the field effect transistor Q1 and the second switch module.
The grid electrode of the field effect transistor Q2 is connected with the second driving circuit, the source electrode is connected with the negative electrode of the load, the grid electrode of the field effect transistor Q2 is connected with the grid electrode of the load through a resistor R6, the negative electrode of the voltage stabilizing diode D4 is connected with the positive electrode of the voltage stabilizing diode D4, the negative electrode of the voltage stabilizing diode D4 is connected with the grid electrode of the field effect transistor Q2, the positive electrode of the load is connected with the positive electrode of the first power supply, and the drain electrode of the field effect transistor Q2 is connected with the source electrode of the field effect transistor Q2 through a capacitor C2 and is also connected with the drain electrode of the field effect transistor Q1.
In a second aspect, the utility model provides a power parallel operation controlling means still, power parallel operation controlling means includes:
at least two sets of power supplies;
the parallel operation control circuit of the power supplies is connected with at least two groups of power supplies.
The utility model provides a power supply parallel operation control circuit and device, through the power switching module, firstly, according to received switching control signal, export first switching signal, control second switch module one-way switch-on, make first power continuously for the load power supply, control third switch module and switch on, fourth switch module one-way switch-on this moment, make the second power begin for the load power supply, then, after the preset time, export second switching signal, control first switch module and cut off, first switch module is cut off this moment, break off first power and load, control fourth switch module and switch on, third switch module and fourth switch module all switch on this moment, supply power for the load by the second power; the power supply of the load is switched to the second power supply from the first power supply, the states of the two switch modules in each group of power supplies are respectively controlled through the power supply switching module, the power supply is always kept not to be powered down, zero power failure switching of the power supplies is realized, the technical problem of how to realize zero power failure switching in the process of supplying power to the load by multiple power supplies is solved, and the power supply switching efficiency is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a parallel operation control circuit of a power supply according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a part of a circuit according to an implementation manner of a parallel operation control circuit of the present invention;
fig. 3 is a schematic diagram of a part of a circuit of another embodiment of a parallel operation control circuit of the present invention;
fig. 4 is a schematic diagram of a micro control unit circuit according to a first embodiment of the power supply parallel operation control circuit of the present invention;
fig. 5 is a schematic diagram of a part of a circuit of a second embodiment of the power parallel control circuit of the present invention.
The objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.
In the present invention, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a device or method that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such device or method. Without further limitation, an element defined by the phrases "comprising 8230; \8230;" 8230; "does not exclude the presence of additional like elements in a device or method that comprises the element.
In addition, in the present invention, unless expressly stated or limited otherwise, the terms "connected" and "fixed" are to be construed broadly, e.g., "connected" may be a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be interconnected within two elements or in a relationship where two elements interact with each other unless otherwise specifically limited. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art. If there is a description in an embodiment of the present invention referring to "first", "second", etc., the description of "first", "second", etc. is for descriptive purposes only and is 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 at least one such feature.
In the present invention, suffixes such as "module", "part", or "unit" used to denote elements are used only for facilitating the description of the present invention, and have no specific meaning by themselves. Thus, "module", "component" or "unit" may be used mixedly. The specific meaning of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art. In addition, the technical solutions of the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent, and is not within the protection scope of the present invention.
In view of many powers among the prior art for load power supply in-process, how to realize the technical problem that the zero falls the electricity and switches, the utility model provides a power supply parallel operation control circuit and device, the general thinking is as follows:
the power supply parallel operation control circuit comprises: the power supply switching module is used for outputting a first switching signal according to the received switching control signal and outputting a second switching signal after preset time; the first switch module is respectively connected with the first power supply and the power supply switching module and is used for controlling the self-stop according to the second switching signal; the second switch module is respectively connected with the first switch module, the power supply switching module and the load and is used for controlling the unidirectional conduction of the second switch module according to the first switching signal; the third switch module is respectively connected with the second power supply and the power supply switching module and is used for controlling the self conduction according to the first switching signal; and the fourth switch module is respectively connected with the third switch module, the power supply switching module and the load and used for controlling the self conduction according to the second switching signal.
The utility model provides a power supply parallel operation control circuit and device, through the power switching module, firstly, according to received switching control signal, export first switching signal, control second switch module one-way switch-on, make first power continuously for the load power supply, control third switch module and switch on, fourth switch module one-way switch-on this moment, make the second power begin for the load power supply, then, after the preset time, export second switching signal, control first switch module and cut off, first switch module is cut off this moment, break off first power and load, control fourth switch module and switch on, third switch module and fourth switch module all switch on this moment, supply power for the load by the second power; in the process of switching a power supply of a load from a first power supply to a second power supply, the states of two switch modules in each group of power supplies are respectively controlled through a power supply switching module, the power supply is always kept not to be powered down, zero power-down switching of the power supplies is realized, the technical problem of how to realize zero power-down switching in the process of supplying power to the load by multiple power supplies is solved, and the power supply switching efficiency is improved; in addition, in the process of switching the first power supply to the second power supply, when the first power supply and the second power supply simultaneously supply power, the currents of the first power supply and the second power supply cannot flow backwards mutually due to the unidirectional conduction state of the second switch module and the fourth switch module, and the technical problem that the currents of a plurality of power supplies flow backwards mutually in the power supply switching process is solved.
The following detailed description of the parallel operation control circuit and the parallel operation control device applied to the technical implementation of the present invention is made with reference to the accompanying drawings and the detailed description:
example one
Referring to fig. 1 to 5, fig. 1 is a schematic structural diagram of a power supply parallel operation control circuit according to a first embodiment of the present invention, fig. 2 is a schematic partial circuit diagram of an implementation manner in a first embodiment of the power supply parallel operation control circuit according to the present invention, fig. 3 is a schematic partial circuit diagram of another implementation manner in a first embodiment of the power supply parallel operation control circuit according to the present invention, fig. 4 is a schematic circuit diagram of a micro control unit according to a first embodiment of the power supply parallel operation control circuit according to the present invention, and fig. 5 is a schematic partial circuit diagram according to a second embodiment of the power supply parallel operation control circuit according to the present invention; the utility model provides a power parallel operation control circuit, power parallel operation control circuit includes:
the power supply switching module is used for receiving the switching control signal, outputting a first switching signal and outputting a second switching signal after preset time;
the first switch module is respectively connected with the first power supply and the power supply switching module and is used for controlling the self-stop according to the second switching signal;
the second switch module is respectively connected with the first switch module, the power supply switching module and the load and is used for controlling the unidirectional conduction of the second switch module according to the first switching signal;
the third switch module is respectively connected with the second power supply and the power supply switching module and is used for controlling the self conduction according to the first switching signal;
and the fourth switch module is respectively connected with the third switch module, the power supply switching module and the load and used for controlling the self conduction according to the second switching signal.
Specifically, the power supply parallel operation control circuit further includes:
and the switching control module is connected with the power switching module and used for generating a switching control signal according to any one of the working temperature of the first power supply, the output voltage of the first power supply, manual switching operation or a preset period and outputting the switching control signal.
In this embodiment, the first power supply is sequentially connected to the first switch module, the second switch module and the load, the second power supply is sequentially connected to the third switch module, the fourth switch module and the load, and both the first power supply and the second power supply can supply power to the load; the switching control module comprises any one of a temperature detection circuit, a voltage detection circuit, a manual switching circuit or an automatic switching circuit; the temperature detection circuit can detect the working temperature of the first power supply, and when the working temperature of the first power supply exceeds a preset temperature threshold, the temperature detection circuit outputs a switching control signal to control the power supply switching module to switch the power supply of the load from the first power supply to the second power supply; the voltage detection circuit can detect the output voltage of the first power supply, and when the output voltage of the first power supply is lower than a preset voltage threshold, the voltage detection circuit outputs a switching control signal to control the power supply switching module to switch the power supply of the load from the first power supply to the second power supply; the temperature detection circuit or the voltage detection circuit detects the working temperature or the output voltage of the power supply supplying power to the load, the first power supply is not limited, when the working temperature of the power supply supplying power exceeds a preset temperature threshold value or the output voltage is less than a preset voltage threshold value, another power supply needs to be connected to supply power to the load, and the temperature detection circuit or the voltage detection circuit outputs a switching control signal at the moment. In addition, the manual switching circuit can output a switching control signal according to the manual switching operation of a user, and control the power supply switching module to switch the power supply of the load from the first power supply to the second power supply, and the manual switching operation can be the operation performed when the user judges that the power supply of the load needs to be switched from the first power supply to the second power supply or from the second power supply to the first power supply according to the actual requirement; the automatic switching circuit may generate the switching control signal according to a preset period, and the preset period may be set according to a power level of the power supply.
In addition, the preset time is set according to the type selection of the first switch module, the second switch module, the third switch module and the fourth switch module, and the preset time may be set to 500ms in this embodiment.
In specific implementation, the power switching module outputs a first switching signal according to a received switching control signal, controls the second switching module to be in one-way conduction, enables the first power supply to continuously supply power to the load, controls the third switching module to be in conduction, keeps the fourth switching module in one-way conduction at the moment, enables the second power supply to start supplying power to the load, outputs a second switching signal after a preset time, controls the first switching module to be off, stops the first switching module at the moment, disconnects the first power supply from the load, controls the fourth switching module to be in conduction, at the moment, both the third switching module and the fourth switching module are in conduction, and supplies power to the load through the second power supply.
Specifically, as an option of this embodiment, the power supply switching module includes:
the micro control unit is used for outputting a first switching signal according to the switching control signal and outputting a second switching signal according to the first switching signal;
the first driving unit is respectively connected with the micro control unit, the first switch module and the second switch module and is used for controlling the second switch module to be in one-way conduction according to the first switching signal and controlling the first switch module to be cut off according to the second switching signal;
and the second driving unit is respectively connected with the micro control unit, the third switch module and the fourth switch module and is used for controlling the conduction of the third switch module according to the first switching signal and controlling the conduction of the fourth switch module according to the second switching signal.
Specifically, the first driving unit includes:
the input end of the first driving circuit is connected with the micro control unit, and the output end of the first driving circuit is connected with the first switch module and used for controlling the first switch module to be cut off according to the second switching signal;
and the input end of the second driving circuit is connected with the micro control unit, and the output end of the second driving circuit is connected with the second switch module and used for controlling the second switch module to be in one-way conduction according to the first switching signal.
In this embodiment, the first and second driving circuits are respectively used for controlling the first and second switch modules of the first power supply, and the circuit structures of the first and second driving circuits may be the same or different.
It is understood that the second driving unit in the present embodiment includes:
the input end of the third driving circuit is connected with the micro control unit, and the output end of the third driving circuit is connected with the third switch module and used for controlling the third switch module to be conducted according to the first switching signal;
and the input end of the fourth driving circuit is connected with the micro control unit, and the output end of the fourth driving circuit is connected with the fourth switching module and used for controlling the fourth switching module to be conducted according to the second switching signal.
In the specific implementation, when a first power supply supplies power to a load, a micro control unit outputs a first switching signal according to a received switching control signal, controls a first driving circuit to drive a second switching module of the first power supply to be in one-way conduction, at the moment, the first power supply continuously supplies power to the load, and controls a third driving circuit to drive a third switching module of the second power supply to be in conduction, so that the second power supply starts to supply power to the load, then, after a preset time, the micro control unit outputs a second switching signal, controls a second driving circuit to drive a first switching module of the first power supply to be off, at the moment, the first switching module of the first power supply is off, so that the first power supply stops supplying power to the load, controls a fourth driving circuit to drive a fourth switching module of the second power supply to be on, at the moment, the third switching module and the fourth switching module of the second power supply are both on, and the second power supply supplies power to the load.
Specifically, as shown in fig. 4, the micro control unit includes a microcontroller U3;
the sixth pin 6 of the microcontroller U3 is connected to the second drive circuit, and the nineteenth pin 19 of the microcontroller U3 is connected to the first drive circuit.
In this embodiment, the micro control unit may be a microcontroller such as a single chip microcomputer, the single chip microcomputer U3 of the type LQF48 (Low-profile cold Flat Package) may be selected in this embodiment, the first switching signal OUT-ON2 and the second switching signal OUT-ON2 are output by two pins of the single chip microcomputer respectively, after receiving the switching control signal, the single chip microcomputer U3 outputs the first switching signal OUT _ ON2 first, and then outputs the second switching signal OUT-ON1 after a preset time; the first driving unit is used for respectively controlling a second switch module and a first switch module of a first power supply according to a first switching signal OUT-ON2 and a second switching signal OUT-ON2, the second driving unit is used for respectively controlling a third switch module and a fourth switch module of a second power supply according to a first switching signal OUT-ON2 and a second switching signal OUT-ON1, the structure of the first driving unit and the structure of the second driving unit can be the same or different, and the embodiment is described in detail by taking the same structure as the first driving unit and the second driving unit as an example.
In the specific implementation, when a first power supply supplies power to a load, the microcontroller U3 outputs a first switching signal according to a received switching control signal, controls the first driving circuit to drive the second switch module of the first power supply to be in one-way conduction, at this time, the first power supply continuously supplies power to the load, controls the third driving circuit to drive the third switch module of the second power supply to be in conduction, at this time, the fourth switch module keeps in one-way conduction, so that the second power supply starts to supply power to the load, then, the microcontroller U3 outputs a second switching signal after a preset time, controls the second driving circuit to drive the first switch module of the first power supply to be off, controls the fourth driving circuit to drive the fourth switch module of the second power supply to be on, at this time, the first switch module of the first power supply is off, so that the first power supply stops supplying power to the load, and both the third switch module and the fourth switch module of the second power supply are on, and the second power supply supplies power to the load.
Specifically, the first driving circuit and the second driving circuit each include any one of a photocoupler, a driver, a field effect transistor, or a triode.
Specifically, as shown in fig. 5, the first driving circuit includes a photo coupler U1;
a first pin 1 of the photoelectric coupler U1 is connected with the micro control unit through a resistor R1, a second pin 2 is grounded, a third pin 3 is connected with the anode of a diode D1, a fourth pin 4 is connected with a first power supply, and the cathode of the diode D1 is connected with a first switch module through a resistor R3.
In this embodiment, the photocoupler is an electric-to-optical-to-electric conversion device that transmits an electric signal using light as a medium; it is composed of a luminous source and a light receiver; the luminous source and the light receiver are assembled in the same closed shell and are isolated from each other by a transparent insulator; the pin of the luminous source is an input end, the pin of the light receiver is an output end, the common luminous source is a light emitting diode, and the light receiver is a photosensitive diode, a phototriode and the like; the model of the photocoupler U1 is selected according to actual needs, and the photocoupler U1 with the model of PC817C is selected in the embodiment. The first power supply can provide power supply voltage for the load and also can provide driving voltage VCC for the photoelectric coupler U1, and the voltage value of the driving voltage VCC is set according to actual needs.
It can be understood that, in the present embodiment, the second driving circuit, the third driving circuit and the fourth driving circuit have the same circuit structure as the first driving circuit, and as shown in fig. 2, the second driving circuit includes: photoelectric coupler U2, photoelectric coupler U2's first pin 1 is connected with little the control unit through resistance R2, second pin 2 ground connection, third pin 3 is connected with diode D2's positive pole, fourth pin 4 is connected with first power, diode D2's negative pole is connected with second switch module through resistance R4, third drive circuit's structure and first drive circuit structure are the same, fourth drive circuit's structure and second drive circuit's structure are the same, for the succinct of description, the repeated description is no longer repeated here.
In the specific implementation, when a first power supply supplies power to a load, a micro control unit outputs a first switching signal OUT-ON2 according to a received switching control signal, controls a photoelectric coupler U2 to be turned off, disconnects a driving voltage VCC from a second switching module, and enables the second switching module of the first power supply to be unidirectionally turned ON, at this time, the first power supply continuously supplies power to the load, controls a photoelectric coupler of a third driving circuit to be turned ON, connects the driving voltage VCC to the third switching module of the second power supply, and drives the third switching module of the second power supply to be turned ON, so that the second power supply starts to supply power to the load, then, the micro control unit outputs a second switching signal OUT-ON1 according to the first switching signal OUT-ON2, controls the photoelectric coupler U1 to be turned off, disconnects the driving voltage VCC from the first switching module of the first power supply, at this time, the first switching module of the first power supply stops supplying power to the load, controls a photoelectric coupler of a fourth driving circuit to be turned ON, connects a fourth switching module of the driving voltage VCC to the second power supply, and the fourth switching module of the first power supply and the fourth switching module turns ON the load, and the fourth switching module turns ON the second switching module.
Specifically, the first switch module comprises a first switch element or a first field effect transistor;
the second switching module comprises a second switching element and a diode, or a field effect transistor, connected in parallel.
Specifically, as shown in fig. 2 and 3, the first switch module includes a first switch element S1-1, and the second switch module includes a second switch element S2-1 and a diode D2 connected in parallel;
one end of a first switch element S1-1 is connected with the anode of a first power supply, the other end of the first switch element S1-1 is respectively connected with one end of a second switch element S2-1 and the anode of a diode D2, and the other end of the second switch element S2-1 and the cathode of the diode D2 are connected with the anode of a load;
or, one end of the first switching element S1-1 is connected to a negative electrode of the first power supply, the other end of the first switching element S1-1 is connected to one end of the second switching element S2-1 and a negative electrode of the diode D2, respectively, and the other end of the second switching element S2-1 and an anode of the diode D2 are connected to a negative electrode of the load.
In this embodiment, the first switching element and the second switching element may include a semiconductor switch or a relay switch, and the semiconductor switch includes a transistor, a thyristor, an insulated gate bipolar transistor, and the like. As shown in fig. 2 and 3, the third switching module is a third switching element S1-2, and the fourth switching module is a fourth switching element S2-2 and a diode D4 connected in parallel; one end of a third switching element S1-2 is connected with the anode of the second power supply, the other end of the third switching element S1-2 is respectively connected with one end of a fourth switching element S2-2 and the anode of a diode D4, and the other end of the fourth switching element S2-2 and the cathode of the diode D4 are connected with the anode of the load; or one end of the third switching element S1-2 is connected to the negative electrode of the second power supply, the other end of the third switching element S1-2 is connected to one end of the fourth switching element S2-2 and the negative electrode of the diode D2, and the other end of the fourth switching element S2-2 and the positive electrode of the diode D4 are connected to the negative electrode of the load.
In specific implementation, when a first power supply supplies power to a load, a switch of a first switch module and a switch of a second switch module are both closed, a power supply switching module outputs a first switching signal according to a received switching control signal to control a switch in the second switch module of the first power supply to be opened, at this time, the first power supply continuously supplies power to the load through diodes in the first switch module and the second switch module and controls a switch of a third switch module of the second power supply to be closed, at this time, the second power supply starts to supply power to the load through the diodes in the third switch module and a fourth switch module, and due to the unidirectional conduction characteristic of the diodes, the current of the first power supply cannot flow to the second power supply, and the current of the second power supply cannot flow to the first power supply; then, after the power supply switching module outputs a second switching signal after the preset time, the switch of the first switch module of the first power supply is controlled to be switched off, the switch of the fourth switch module of the second power supply is controlled to be switched on, at the moment, the diode in the first switch module of the first power supply stops supplying power to the load, the switch of the third switch module and the switch of the fourth switch module of the second power supply are controlled to be switched on, and the second power supply supplies power to the load.
The embodiment provides a power supply parallel operation control circuit, which includes a power supply switching module, a first switching signal is output according to a received switching control signal, switching-off of a switch of a second switch module of a first power supply is controlled, at the moment, the first power supply continuously supplies power to a load through diodes of the first switch module and the second switch module, switching-on of a switch of a third switch module of the second power supply is controlled, at the moment, the fourth switch module keeps unidirectional conduction, so that the second power supply starts to supply power to the load, then, the power supply switching module outputs a second switching signal after a preset time, switching-off of the switch of the first switch module of the first power supply is controlled, at the moment, the first switch module stops supplying power to the load, switching-on of a fourth switch module of the second power supply is controlled, at the moment, the third switch module and the fourth switch module are both on, and the second power supply supplies power to the load; in the process of switching a power supply of a load from a first power supply to a second power supply, the states of two switch modules in the power supply are respectively controlled, so that the power supply is always kept not to be powered down, zero power failure switching of the power supply is realized, the technical problem of how to realize zero power failure switching in the process of supplying power to the load by multiple power supplies is solved, and the power supply switching efficiency is improved; in addition, in the process of switching the first power supply to the second power supply, when the first power supply and the second power supply power simultaneously, due to the one-way conduction characteristics of the diode in the second switch module and the diode in the fourth switch module, the currents of the first power supply and the second power supply cannot flow backwards mutually, and the technical problem that the currents of a plurality of power supplies flow backwards mutually in the power supply switching process is solved.
Example two
Further, referring to fig. 5, fig. 5 is a schematic diagram of a partial circuit of a second embodiment of the power parallel control circuit of the present invention, and this embodiment provides a power parallel control circuit, where the first switch module includes a field effect transistor Q1, and the second switch module includes a field effect transistor Q2;
the grid of the field effect transistor Q1 is connected with the first driving circuit, the source electrode is connected with the negative electrode of the first power supply, the grid of the field effect transistor Q1 is connected with the resistor R5, the positive electrode of the voltage stabilizing diode D3 is connected, the negative electrode of the voltage stabilizing diode D3 is connected with the grid of the field effect transistor Q1, the drain electrode of the field effect transistor Q1 is connected with the source electrode of the field effect transistor Q1 through the capacitor C1, and the drain electrode of the field effect transistor Q1 is connected with the second switch module.
The grid of the field effect transistor Q2 is connected with the second driving circuit, the source electrode is connected with the negative electrode of the load, the grid of the field effect transistor Q2 is connected with the grid of the load through a resistor R6, the grid of the voltage stabilizing diode D4 is connected with the positive electrode of the voltage stabilizing diode D4, the negative electrode of the voltage stabilizing diode D4 is connected with the grid of the field effect transistor Q2, the positive electrode of the load is connected with the positive electrode of the first power supply, and the drain electrode of the field effect transistor Q2 is connected with the source electrode of the field effect transistor Q2 through a capacitor C2 and is also connected with the drain electrode of the field effect transistor Q1.
In this embodiment, the first switch module and the second switch module are respectively connected to the negative electrode of the first power source and the negative electrode of the load, the third switch module and the fourth switch module are respectively connected to the negative electrode of the second power source and the negative electrode of the load, and the voltage value of the driving voltage VCC may be 12V, where the structure of the third switch module may be the same as that of the first switch module, the structure of the fourth switch module may be the same as that of the second switch module, and for simplicity of the description, details are not repeated here.
In the specific implementation, when a first power supply supplies power to a load, a micro control unit outputs a first switching signal OUT-ON2 according to a received switching control signal, controls a photoelectric coupler U2 to be turned off, disconnects a 12V driving voltage VCC from a field effect tube Q2, enables the field effect tube Q2 of the first power supply to be turned ON in a single direction, at the moment, the first power supply continuously supplies power to the load through diodes in the field effect tube Q1 and the field effect tube Q2, controls a photoelectric coupler of a third driving circuit to be turned ON, connects the driving voltage VCC to a third switch module of a second power supply, drives the field effect tube of the third switch module to be turned ON, enables the second power supply to start supplying power to the load, then, after a preset time, the micro control unit outputs a second switching signal OUT-ON1, controls the photoelectric coupler U1 to be turned off, disconnects the 12V driving voltage VCC from the field effect tube Q1 of the first power supply, enables the field effect tube Q1 of the first power supply to be turned off, at the field effect tube Q1 of the first power supply is turned off, the first power supply and controls a fourth driving voltage VCC to be connected to the second switch module, and the second switch module is connected to the second switch module, and the fourth switch module is connected to the load.
The embodiment provides a power supply parallel operation control circuit, which includes a power supply switching module, a field effect transistor Q2, a field effect transistor Q1, a diode in the field effect transistor Q2, a third switching module, a field effect transistor Q1, a fourth switching module, a power supply control module and a power supply control module, wherein the power supply switching module outputs a first switching signal according to a received switching control signal, the field effect transistor Q2 is unidirectionally switched on according to the first switching signal, the field effect transistor Q1 is switched on according to the first switching signal, the second power supply starts to supply power to a load, the power supply switching module outputs a second switching signal after a preset time, the field effect transistors of the field effect transistor Q1 and the fourth switching module are switched off and on according to the second switching signal, the field effect transistor Q1 is switched off at the moment, the first power supply is disconnected from the load, the field effect transistor of the third switching module and the field effect transistor of the fourth switching module are switched on at the moment, the second power supply is connected to the load, and supplies power to the load; in the process of switching a power supply of a load from a first power supply to a second power supply, the states of two field effect transistors in each group of power supplies are respectively controlled through a power supply switching module, the power supply is always kept not to be powered down, zero power-down switching of the power supplies is realized, the technical problem of how to realize zero power-down switching in the process of supplying power to the load by multiple power supplies is solved, and the power supply switching efficiency is improved; in addition, in the process of switching the first power supply to the second power supply, when the first power supply and the second power supply power simultaneously, due to the unidirectional conduction characteristic of the diode in the field effect transistor, the currents of the first power supply and the second power supply cannot flow backwards mutually, and the technical problem that the currents of a plurality of power supplies flow backwards mutually when the power supplies are switched is solved.
EXAMPLE III
Based on same design, the embodiment of the utility model provides a still provide a power parallel operation controlling means, power parallel operation controlling means includes:
at least two sets of power supplies;
the parallel operation control circuit of the power supplies is connected with at least two groups of power supplies.
In the embodiment, the number of the power supplies can be set according to actual conditions, and the parallel operation control circuit of the power supplies can realize the switching of any two groups of power supplies to supply power to the load; the number of the switch modules is twice of the number of the power supplies, at least two groups of power supplies can be respectively arranged in independent power supply boxes, and two switch modules are arranged in each power supply box.
It should be noted that, the specific structure of the power parallel operation control circuit refers to any one of the first or second embodiments, and since this embodiment adopts all technical solutions of all the embodiments, at least all the beneficial effects brought by the technical solutions of the embodiments are achieved, and details are not repeated here.
The above is only the preferred embodiment of the present invention, and the patent scope of the present invention is not limited thereby, and all the equivalent structures or equivalent flow changes made by the contents of the specification and the drawings of the present invention, or directly or indirectly applied to other related technical fields, are included in the same way in the patent protection scope of the present invention.
Claims (10)
1. A power supply parallel operation control circuit, comprising:
the power supply switching module is used for outputting a first switching signal according to the received switching control signal and outputting a second switching signal after preset time;
the first switch module is respectively connected with the first power supply and the power supply switching module and is used for controlling the self-stop according to the second switching signal;
the second switch module is respectively connected with the first switch module, the power supply switching module and the load and is used for controlling the unidirectional conduction of the second switch module according to the first switching signal;
the third switch module is respectively connected with the second power supply and the power supply switching module and is used for controlling the self conduction according to the first switching signal;
and the fourth switch module is respectively connected with the third switch module, the power supply switching module and the load and is used for controlling the self conduction according to the second switching signal.
2. The power supply parallel operation control circuit according to claim 1, further comprising:
and the switching control module is connected with the power switching module and used for generating the switching control signal according to any one of the working temperature of the first power supply, the output voltage of the first power supply, manual switching operation or a preset period and outputting the switching control signal.
3. The power supply parallel operation control circuit according to claim 1, wherein the power supply switching module includes:
the micro control unit is used for outputting a first switching signal according to the switching control signal and outputting a second switching signal after the preset time;
the first driving unit is respectively connected with the micro control unit, the first switch module and the second switch module and is used for controlling the second switch module to be in one-way conduction according to the first switching signal and controlling the first switch module to be in cut-off according to the second switching signal;
and the second driving unit is respectively connected with the micro control unit, the third switch module and the fourth switch module and is used for controlling the third switch module to be conducted according to the first switching signal and controlling the fourth switch module to be conducted according to the second switching signal.
4. The power parallel control circuit of claim 3, wherein the first drive unit comprises:
the input end of the first driving circuit is connected with the micro control unit, and the output end of the first driving circuit is connected with the first switch module and used for controlling the first switch module to be switched off according to the second switching signal;
and the input end of the second driving circuit is connected with the micro control unit, and the output end of the second driving circuit is connected with the second switch module and used for controlling the second switch module to be in one-way conduction according to the first switching signal.
5. The power parallel control circuit of claim 4, wherein the micro control unit comprises a microcontroller U3;
and a sixth pin of the microcontroller U3 is connected with the second drive circuit, and a nineteenth pin of the microcontroller U3 is connected with the first drive circuit.
6. The power parallel operation control circuit according to claim 5, wherein the first driving circuit and the second driving circuit each comprise any one of a photocoupler, a driver, a field effect transistor, or a triode.
7. The power parallel operation control circuit according to claim 6, wherein the first driving circuit includes a photocoupler U1;
the first pin of the photoelectric coupler U1 is connected with the nineteenth pin of the microcontroller U3 through a resistor R1, the second pin is grounded, the third pin is connected with the anode of a diode D1, the fourth pin is connected with the first power supply, and the cathode of the diode D1 is connected with the first switch module through a resistor R3.
8. The power parallel control circuit of claim 1, wherein the first switching module comprises a first switching element and the second switching module comprises a second switching element and a diode connected in parallel;
one end of the first switching element is connected with the anode of the first power supply, the other end of the first switching element is respectively connected with one end of the second switching element and the anode of the diode, and the other end of the second switching element and the cathode of the diode are connected with the anode of the load;
or, one end of the first switching element is connected to a negative electrode of the first power source, the other end of the first switching element is connected to one end of the second switching element and a negative electrode of the diode, and the other end of the second switching element and a positive electrode of the diode are connected to a negative electrode of the load.
9. The power supply parallel operation control circuit according to claim 4, wherein the first switch module comprises a field effect transistor Q1, and the second switch module comprises a field effect transistor Q2;
the grid electrode of the field effect transistor Q1 is connected with the first driving circuit, the source electrode of the field effect transistor Q1 is connected with the negative electrode of the first power supply, the grid electrode of the field effect transistor Q1 is connected with a resistor R5, the positive electrode of a voltage stabilizing diode D3 is connected with the positive electrode of the voltage stabilizing diode D3, the negative electrode of the voltage stabilizing diode D3 is connected with the grid electrode of the field effect transistor Q1, the drain electrode of the field effect transistor Q1 is connected with the source electrode of the field effect transistor Q1 through a capacitor C1, and the drain electrode of the field effect transistor Q1 is also connected with the second switch module;
the grid electrode of the field effect transistor Q2 is connected with the second driving circuit, the source electrode is connected with the negative electrode of the load, the grid electrode of the field effect transistor Q2 is connected with the grid electrode of the load through a resistor R6, the positive electrode of a voltage stabilizing diode D4 is connected with the positive electrode of the voltage stabilizing diode D4, the positive electrode of the load is connected with the positive electrode of the first power supply, and the drain electrode of the field effect transistor Q2 is connected with the source electrode of the field effect transistor Q2 through a capacitor C2 and is also connected with the drain electrode of the field effect transistor Q1.
10. A power supply parallel operation control device, characterized by comprising:
at least two sets of power supplies;
the power supply parallel operation control circuit according to any one of claims 1 to 9 connected to the at least two sets of power supplies.
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| CN202221658102.9U CN218449592U (en) | 2022-06-29 | 2022-06-29 | Power supply parallel operation control circuit and device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202221658102.9U CN218449592U (en) | 2022-06-29 | 2022-06-29 | Power supply parallel operation control circuit and device |
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