CN214255823U - High-power direct-current power supply system - Google Patents
High-power direct-current power supply system Download PDFInfo
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- CN214255823U CN214255823U CN202022652849.0U CN202022652849U CN214255823U CN 214255823 U CN214255823 U CN 214255823U CN 202022652849 U CN202022652849 U CN 202022652849U CN 214255823 U CN214255823 U CN 214255823U
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Abstract
The utility model discloses a high-power direct current power supply system, including host system, the AC input module, zero cross detection module, throw the ware of cutting, exchange changes direct current module, direct current output module and communication module, the output of AC input module passes through the flinger and connects the input to exchanging the direct current module, the output that exchanges to change direct current module is connected with direct current output module's input, the output that the AC input module passes through zero cross detection module and is connected to host system's first input, throw the ware of cutting, it all is connected with host system to exchange to change direct current module and communication module. The utility model discloses a zero cross detection module real-time detection alternating current zero crossing point and transmission to host system, and then control throw and cut the ware and break off for zero time, the voltage switches on when zero at alternating current to realized no arc switching, improved DC power supply system's stability and consumer's life, provide the guarantee for user's safe power consumption, but wide application in DC power supply technical field.
Description
Technical Field
The utility model belongs to the technical field of the DC power supply technique and specifically relates to a high-power DC power supply system.
Background
Dc switching power supplies are generally classified into linear control switching power supplies and phase control switching power supplies. The linear switching power supply has high output stability, small ripple and no ripple interference and noise, but the required transformer and filter capacitor have large volume and weight, and in addition, if the linear switching power supply is used for high-power direct current output, the current flowing through the adjusting tube is increased, so that the power consumption of the adjusting tube is increased, the heat production is increased, and the conversion efficiency is reduced; the phase-controlled switching power supply can realize output of different voltages through duty ratio, and conversion efficiency is higher.
The existing phase-control switching power supply only comprises a basic filter, a rectifying circuit, a control circuit and the like, when alternating current is converted into direct current, an alternating current side can generate electric arcs to impact a power supply and a load, particularly a high-power switching power supply, and the power supply and the load can be burnt out or even cause fire when the power supply and the load are serious; and the existing switching power supply generally only has basic leakage protection and overcurrent protection, and cannot ensure the power utilization safety of users.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model aims to provide a: provided is a high-power DC power supply system with higher safety.
The utility model adopts the technical proposal that:
a high-power direct-current power supply system comprises a main control module, an alternating-current input module, a zero-crossing detection module, a switching device, an alternating-current to direct-current conversion module, a direct-current output module and a communication module, wherein the output end of the alternating-current input module is connected to the input end of the alternating-current to direct-current conversion module through the switching device, the output end of the alternating-current to direct-current conversion module is connected with the input end of the direct-current output module, the output end of the alternating-current input module is further connected to a first input end of the main control module through the zero-crossing detection module, and the switching device, the alternating-current to direct-current conversion module and the communication module are all connected with the main control module.
Further, it includes control circuit, input electric wire netting wave filter, exchanges and changes direct current circuit and output rectifier filter to exchange direct current module, exchange input module's output passes through the switch is connected to input electric wire netting wave filter's input, input electric wire netting wave filter's output passes through exchange changes direct current circuit and is connected to output rectifier filter's input, output rectifier filter's output with direct current output module's input is connected, master control module input electric wire netting wave filter exchange change direct current circuit with output rectifier filter all with control circuit connects.
Further, the ac-dc conversion module further includes a protection circuit, and the protection circuit is connected in series between the output rectifier filter and the dc output module.
Further, the protection circuit includes at least one of a leakage protection switch and an air circuit breaker.
Furthermore, the high-power direct-current power supply system further comprises an alternating-current side acquisition module, wherein the input end of the alternating-current side acquisition module is connected with the output end of the alternating-current input module, and the output end of the alternating-current side acquisition module is connected with the second input end of the main control module.
Further, the alternating current side acquisition module comprises a first voltage acquisition circuit, a first current acquisition circuit and a voltage and current processing circuit, the output end of the alternating current input module is connected to the first input end of the voltage and current processing circuit through the first voltage acquisition circuit, the output end of the alternating current input module is connected to the second input end of the voltage and current processing circuit through the first current acquisition circuit, and the output end of the voltage and current processing circuit is connected with the second input end of the main control module.
Furthermore, the high-power direct-current power supply system further comprises a direct-current side acquisition module, wherein the input end of the direct-current side acquisition module is connected with the output end of the alternating-current to direct-current conversion module, and the output end of the direct-current side acquisition module is connected with the third input end of the main control module.
Further, the direct current side collection module comprises a second voltage collection circuit, a second current collection circuit and a comparator circuit, the output end of the alternating current to direct current module is connected to the first input end of the comparator circuit through the second voltage collection circuit, the output end of the alternating current to direct current module is connected to the second input end of the comparator circuit through the second current collection circuit, and the output end of the comparator circuit is connected with the third input end of the main control module.
Further, the high-power direct-current power supply system also comprises an I/O input/output module, and the I/O input/output module is connected with the main control module.
Further, the communication module includes at least one of a 485 communication module, a WIFI communication module, a CAT1 communication module, and an NB-IoT communication module.
The utility model has the advantages that: the utility model discloses an alternating current input module input alternating current, through throw cut ware and exchange and change direct current module, at last by direct current output module output direct current, simultaneously through zero crossing point and transmission to host system of zero cross detection module real-time detection alternating current, throw by host system control and cut the ware and break off for zero at alternating current electric current, switch on when alternating current voltage is zero, thereby realized the no electric arc switching, the stability of DC power supply system and consumer's life has been improved, guarantee is provided for user's safe power consumption.
Drawings
Fig. 1 is a schematic structural diagram of a high-power dc power supply system according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of an ac-side acquisition module according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a dc side acquisition module according to an embodiment of the present invention;
fig. 4 is a schematic circuit connection diagram of a main control module according to an embodiment of the present invention;
fig. 5 is a schematic diagram of an ac-dc converter circuit according to an embodiment of the present invention;
fig. 6 is a schematic diagram of a voltage-current processing circuit according to an embodiment of the present invention;
fig. 7 is a schematic diagram of a first voltage acquisition circuit according to an embodiment of the present invention;
fig. 8 is a schematic diagram of a first current collecting circuit according to an embodiment of the present invention;
fig. 9 is a schematic diagram of a comparator circuit according to an embodiment of the present invention.
Reference numerals:
VCC, circuit supply voltage; GND and a ground terminal; AGND, analog signal ground.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.
In the description of the present invention, the meaning of a plurality is two or more, if there is a description that the first and the second are only used for distinguishing the technical features, but not understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the precedence of the indicated technical features.
In the description of the present invention, unless explicitly defined otherwise, the words such as setting, connecting and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in the present invention by combining the specific contents of the technical solutions.
Referring to fig. 1, the embodiment of the utility model provides a high-power direct current power supply system, include host system, exchange input module, zero cross detection module, throw and cut the ware, exchange and change direct current module, direct current output module and communication module, exchange input module's output passes through the switching ware is connected to exchange changes direct current module's input, exchange change direct current module's output with direct current output module's input is connected, exchange input module's output still passes through zero cross detection module is connected to host system's first input, throw and cut the ware exchange change direct current module with communication module all with host system connects.
Specifically, the utility model discloses host system adopts STM32F103 singlechip, as shown in FIG. 4 do the utility model discloses host system's that the embodiment provides a circuit connection schematic diagram, the utility model discloses host system can pass through the zero crossing point of the voltage and the zero crossing point of electric current of zero crossing detection module real-time detection input alternating current, and then control the switching ware action, still can carry out data interaction with external communication equipment through communication module, realize remote control.
The embodiment of the utility model provides a through alternating current input module input alternating current, through throw cut ware and exchange and change direct current module, be the consumer power supply by direct current output module output direct current at last, simultaneously through zero crossing point and transmission to host system of zero cross detection module real-time detection alternating current, throw cut ware by host system control and break off when alternating current is zero, switch on when alternating current voltage is zero, thereby realized the no electric arc switching, direct current power supply system's stability and consumer's life have been improved, guarantee is provided for user's safe power consumption.
Optionally, the switch includes a relay, an IGBT (insulated gate bipolar transistor), a thyristor, and an action time measuring circuit.
Specifically, since the relay has a certain operation time during actual operation, it is necessary to control the relay operation in advance (the advance amount is the operation time of the relay) according to a voltage zero-crossing point (i.e., a time when the voltage is zero) and a current zero-crossing point (i.e., a time when the current is zero).
The embodiment of the utility model provides an in, measure and transmit to host system relay action time through action time measuring circuit, by host system according to voltage zero crossing point, electric current zero crossing point and relay action time control relay disconnection in advance and switch on, further guaranteed not have the arc switching, improved consumer's life and DC power supply system's stability.
Referring to fig. 1, as a further optional implementation manner, the ac-to-dc conversion module includes a control circuit, an input grid filter, an ac-to-dc conversion circuit, and an output rectifier filter, an output end of the ac input module is connected to an input end of the input grid filter through the switch, an output end of the input grid filter is connected to an input end of the output rectifier filter through the ac-to-dc conversion circuit, an output end of the output rectifier filter is connected to an input end of the dc output module, and the main control module, the input grid filter, the ac-to-dc conversion circuit, and the output rectifier filter are all connected to the control circuit.
As shown in fig. 5, the embodiment of the present invention provides a schematic diagram of an ac-to-dc converter circuit, which converts the input ac into dc output to supply power to the electric equipment through processing such as rectification and filtering.
Optionally, the embodiment of the utility model provides a send PWM signal through host system, control CMOS pipe periodicity on, break to control direct current output duty cycle, and then realize that output voltage, electric current are controllable.
Referring to fig. 1, as a further alternative implementation, the ac-to-dc module further includes a protection circuit, and the protection circuit is connected in series between the output rectifier filter and the dc output module.
Specifically, the protection circuit is used for disconnecting the direct-current power supply system to protect the power supply and the electric equipment when the direct-current power supply system generates electric leakage, overcurrent or short circuit.
Further in an alternative embodiment, the protection circuit includes at least one of a leakage current protection switch and an air circuit breaker.
Specifically, the earth leakage protection switch is used for automatically switching off when the direct current power supply system generates electric leakage so as to realize earth leakage protection, and the air circuit breaker is used for automatically switching off when the current output by the direct current power supply system exceeds a rated value so as to realize overcurrent protection.
Referring to fig. 1, as a further optional implementation manner, the high-power dc power supply system further includes an ac-side acquisition module, an input end of the ac-side acquisition module is connected to an output end of the ac input module, and an output end of the ac-side acquisition module is connected to the second input end of the main control module.
Specifically, the alternating current side acquisition module is used for acquiring relevant parameters of the input alternating current and transmitting the parameters to the main control module.
Referring to fig. 2, as a further optional implementation manner, the ac-side collecting module includes a first voltage collecting circuit, a first current collecting circuit, and a voltage-current processing circuit, an output end of the ac input module is connected to a first input end of the voltage-current processing circuit through the first voltage collecting circuit, an output end of the ac input module is further connected to a second input end of the voltage-current processing circuit through the first current collecting circuit, and an output end of the voltage-current processing circuit is connected to a second input end of the main control module.
The utility model discloses voltage electric current processing circuit adopts BL6522B chip, shown as in FIG. 6 does the utility model discloses the schematic diagram of the voltage electric current processing circuit who provides, shown as in FIG. 7 does the utility model discloses the schematic diagram of the first voltage acquisition circuit who provides, shown as in FIG. 8 does the utility model provides a schematic diagram of the first electric current acquisition circuit who provides.
Specifically, the BL6522B chip can measure total active power and energy, fundamental active power and energy, reactive power and energy, apparent power and energy of each phase and the combined phase of three phases, and can provide parameters such as each phase current, voltage, power factor and the like. The embodiment of the utility model provides a gather the real-time voltage and the real-time current of input alternating current through first voltage acquisition circuit and first current acquisition circuit, then through BL6522B chip processing back alternating current parameter transmission to host system that will obtain, host system accessible communication module transmits alternating current parameter to external communication equipment, and the managers of being convenient for look over.
Referring to fig. 1, as a further optional implementation manner, the high-power dc power supply system further includes a dc-side acquisition module, an input end of the dc-side acquisition module is connected to an output end of the ac-to-dc conversion module, and an output end of the dc-side acquisition module is connected to a third input end of the main control module.
Specifically, the direct current side acquisition module is used for acquiring direct current parameters output by the direct current power supply system and transmitting the direct current parameters to the main control module.
Referring to fig. 3, as a further optional implementation manner, the dc-side collecting module includes a second voltage collecting circuit, a second current collecting circuit, and a comparator circuit, an output end of the ac-to-dc module is connected to a first input end of the comparator circuit through the second voltage collecting circuit, an output end of the ac-to-dc module is further connected to a second input end of the comparator circuit through the second current collecting circuit, and an output end of the comparator circuit is connected to a third input end of the main control module.
Specifically, the comparator circuit of the embodiment of the present invention adopts an LM393 comparator chip, as shown in fig. 9, which is a schematic diagram of the comparator circuit provided by the embodiment of the present invention. The embodiment of the utility model provides a preset has the undervoltage protection threshold value, overvoltage protection threshold value and current protection threshold value in host system, host system passes through second voltage acquisition circuit and second current acquisition circuit and gathers the direct current's of DC power supply system output real-time voltage and real-time current after, rethread comparator circuit with the gathering result with corresponding threshold value of predetermineeing carry out the comparison to with comparative result feedback to host system, send corresponding control command according to the comparative result by host system. For example, when the collected direct-current voltage output by the direct-current power supply system is lower than a set undervoltage protection threshold value or higher than a set overvoltage protection threshold value, the main control module issues a control instruction to disconnect the alternating-current to direct-current conversion module; when the collected direct current output by the direct current power supply system is higher than the current protection threshold value, the main control module can also send a control instruction to disconnect the alternating current-to-direct current module. The embodiment of the utility model provides a through the setting of direct current side collection module, realized excessive pressure, overflow and undervoltage protection, further promoted DC power supply system's stability.
Optionally, the embodiment of the utility model provides a still include temperature detection module, temperature detection module with host system connects. The temperature detection module collects temperature signals and the temperature signals are processed by the main control module to realize high-temperature protection.
Referring to fig. 1, as a further optional implementation manner, the high-power dc power supply system further includes an I/O input/output module, and the I/O input/output module is connected to the main control module.
In particular, the I/O input output module may serve as a signal input interface and a signal output interface for communicating with an external communication device.
Optionally, an optical coupling isolation circuit is further disposed between the I/O input/output module and the main control module to shield the abnormal signal.
Further as an optional embodiment, the communication module includes at least one of a 485 communication module, a WIFI communication module, a CAT1 communication module, and an NB-IoT communication module.
Specifically, the CAT, i.e., UE-Category, is divided into 10 classes, where CAT1 refers to internet of things communication connected to objects with an uplink speed of 5Mbps and a downlink speed of 10 Mbps; the NB-IoT is based on a cellular network narrowband Internet of things, only needs 180KHZ bandwidth, but has high connection efficiency and low power consumption.
The embodiment of the utility model provides an adopt CAT1 communication module and external communication equipment to communicate, guaranteed stable, reliable of signal when speed transmission data in the realization, reduced the network deployment cost.
Optionally, the embodiment of the utility model provides a connect the high in the clouds through CAT1 communication module and can realize remote monitoring, look over equipment power consumption situation etc. the user can look over through cell-phone APP connection high in the clouds, has promoted user's experience and has felt.
While the preferred embodiments of the present invention have been described in detail, it will be understood by those skilled in the art that the foregoing and various other changes, omissions and deviations in the form and detail thereof may be made without departing from the scope of this invention.
Claims (10)
1. A high-power direct current power supply system is characterized in that: the intelligent switching device comprises a main control module, an alternating current input module, a zero-crossing detection module, a switching device, an alternating current-to-direct current module, a direct current output module and a communication module, wherein the output end of the alternating current input module is connected to the input end of the alternating current-to-direct current module through the switching device, the output end of the alternating current-to-direct current module is connected with the input end of the direct current output module, the output end of the alternating current input module is further connected to a first input end of the main control module through the zero-crossing detection module, and the switching device, the alternating current-to-direct current module and the communication module are all connected with the main control module.
2. A high power dc power supply system according to claim 1, wherein: the AC-to-DC conversion module comprises a control circuit, an input power grid filter, an AC-to-DC conversion circuit and an output rectifier filter, wherein the output end of the AC input module is connected to the input end of the input power grid filter through the switch, the output end of the input power grid filter is connected to the input end of the output rectifier filter through the AC-to-DC conversion circuit, the output end of the output rectifier filter is connected with the input end of the DC output module, and the main control module is connected with the input power grid filter, the AC-to-DC conversion circuit and the output rectifier filter are connected with the control circuit.
3. A high power dc power supply system according to claim 2, wherein: the alternating current-to-direct current module further comprises a protection circuit, and the protection circuit is connected in series between the output rectifying filter and the direct current output module.
4. A high power dc power supply system according to claim 3, wherein: the protection circuit includes at least one of a leakage protection switch and an air circuit breaker.
5. A high power dc power supply system according to claim 1, wherein: the high-power direct-current power supply system further comprises an alternating-current side acquisition module, wherein the input end of the alternating-current side acquisition module is connected with the output end of the alternating-current input module, and the output end of the alternating-current side acquisition module is connected with the second input end of the main control module.
6. The high power dc power supply system according to claim 5, wherein: the alternating current side acquisition module comprises a first voltage acquisition circuit, a first current acquisition circuit and a voltage and current processing circuit, the output end of the alternating current input module is connected to the first input end of the voltage and current processing circuit through the first voltage acquisition circuit, the output end of the alternating current input module is connected to the second input end of the voltage and current processing circuit through the first current acquisition circuit, and the output end of the voltage and current processing circuit is connected with the second input end of the main control module.
7. A high power dc power supply system according to claim 1, wherein: the high-power direct-current power supply system further comprises a direct-current side acquisition module, wherein the input end of the direct-current side acquisition module is connected with the output end of the alternating-current to direct-current conversion module, and the output end of the direct-current side acquisition module is connected with the third input end of the main control module.
8. A high power dc power supply system according to claim 7, wherein: the direct current side acquisition module comprises a second voltage acquisition circuit, a second current acquisition circuit and a comparator circuit, the output end of the alternating current to direct current module is connected to the first input end of the comparator circuit through the second voltage acquisition circuit, the output end of the alternating current to direct current module is connected to the second input end of the comparator circuit through the second current acquisition circuit, and the output end of the comparator circuit is connected with the third input end of the main control module.
9. A high power dc power supply system according to claim 1, wherein: the high-power direct-current power supply system further comprises an I/O input/output module, and the I/O input/output module is connected with the main control module.
10. A high power dc power supply system according to any one of claims 1 to 9, wherein: the communication module comprises at least one of a 485 communication module, a WIFI communication module, a CAT1 communication module and an NB-IoT communication module.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202022652849.0U CN214255823U (en) | 2020-11-16 | 2020-11-16 | High-power direct-current power supply system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202022652849.0U CN214255823U (en) | 2020-11-16 | 2020-11-16 | High-power direct-current power supply system |
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| CN214255823U true CN214255823U (en) | 2021-09-21 |
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| CN202022652849.0U Active CN214255823U (en) | 2020-11-16 | 2020-11-16 | High-power direct-current power supply system |
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