CN110854991A - Power supply control circuit - Google Patents
Power supply control circuit Download PDFInfo
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- CN110854991A CN110854991A CN201911203755.0A CN201911203755A CN110854991A CN 110854991 A CN110854991 A CN 110854991A CN 201911203755 A CN201911203755 A CN 201911203755A CN 110854991 A CN110854991 A CN 110854991A
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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
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/165—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
- G01R19/16533—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values characterised by the application
- G01R19/16538—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values characterised by the application in AC or DC supplies
- G01R19/16547—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values characterised by the application in AC or DC supplies voltage or current in AC supplies
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/02—Details
- H02H3/06—Details with automatic reconnection
- H02H3/066—Reconnection being a consequence of eliminating the fault which caused disconnection
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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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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Protection Of Static Devices (AREA)
Abstract
The embodiment of the invention discloses a power supply control circuit, which comprises a power supply input end, a load output end, a switch sub-circuit, an alternating current sampling sub-circuit, a comparison sub-circuit and a control sub-circuit, wherein the switch sub-circuit is used for receiving a control signal of the control sub-circuit and controlling the on-off state of the switch sub-circuit according to the control signal; the alternating current sampling sub-circuit is used for collecting an analog current signal or an analog voltage signal and outputting the analog current signal or the analog voltage signal to the comparison sub-circuit; the comparison sub-circuit is used for converting the analog current signal or the analog voltage signal into a digital voltage signal, comparing the digital voltage signal with a preset voltage threshold value to obtain a first comparison result and outputting the first comparison result to the control sub-circuit; the control sub-circuit is used for outputting a first control signal to the switch sub-circuit according to the first comparison result. The embodiment of the invention realizes the detection of the current and voltage abnormal condition of the standby power system, enables the standby power system to have the self-recovery function after the failure is relieved, and improves the safety and the reliability of the standby power system.
Description
Technical Field
The embodiment of the invention relates to the field of electronic technology, in particular to a power supply control circuit.
Background
In order to ensure the reliability of power supply, the standby power system gradually becomes an indispensable part of some important power supply systems, and when a main power supply fault caused by the interruption of mains supply and the like occurs, the system is automatically switched to be supplied with power by the standby power system, so that the equipment can reliably work.
However, the existing backup power system generally uses only a fuse as a protection scheme of the whole backup power system, so that the safety is low, and the existing backup power system does not have a function of self-recovery after the fault is relieved.
Disclosure of Invention
The embodiment of the invention provides a power supply control circuit which can improve the safety and reliability of a standby power system.
In order to solve the above technical problem, an embodiment of the present invention provides a power control circuit, which includes a power input terminal, a load output terminal, a switch sub-circuit, an ac sampling sub-circuit, a comparator sub-circuit, and a control sub-circuit, wherein: the switch sub-circuit is respectively connected with the power input end, the alternating current sampling sub-circuit and the control sub-circuit and is used for receiving the control signal of the control sub-circuit and controlling the on-off state of the switch sub-circuit according to the control signal; the alternating current sampling sub-circuit is respectively connected with the switch sub-circuit, the comparison sub-circuit and the load output end, and is used for collecting an analog current signal or an analog voltage signal and outputting the analog current signal or the analog voltage signal to the comparison sub-circuit; the comparison sub-circuit is respectively connected with the alternating current sampling sub-circuit and the control sub-circuit and is used for converting the analog current signal or the analog voltage signal into a digital voltage signal, comparing the digital voltage signal with a preset voltage threshold value to obtain a first comparison result and outputting the first comparison result to the control sub-circuit; the control sub-circuit is respectively connected with the comparison sub-circuit and the switch sub-circuit and is used for outputting a first control signal to the switch sub-circuit according to the first comparison result.
Optionally, the switch sub-circuit comprises a first relay comprising a first control coil and a first control switch, wherein: the first control coil is connected with the control sub-circuit, and the first control switch is respectively connected with the voltage input end and the alternating current sampling sub-circuit.
Optionally, the ac sampling sub-circuit includes a sampling resistor, a programmable gain amplifier, and an analog filter, wherein: the sampling resistor is arranged on a line connecting the switch sub-circuit and the load output end; two input ends of the programmable gain amplifier are connected to two ends of the sampling resistor, and an output end of the programmable gain amplifier is connected to an input end of the analog filter; the output end of the analog filter is connected to the input end of the comparison sub-circuit.
Optionally, the comparison sub-circuit comprises an analog-to-digital converter, a comparator and a reference voltage generation unit circuit, wherein: the input end of the analog-to-digital converter is connected to the output end of the comparison sub-circuit, and the output end of the analog-to-digital converter is connected to the first input end of the comparator; the second input end of the comparator is connected to the reference voltage generating unit circuit, and the output end of the comparator is connected to the control sub-circuit.
Optionally, the power control circuit further includes: a delay protection sub-circuit, wherein: and the time delay protection sub-circuit is respectively connected with the switch sub-circuit and the alternating current sampling sub-circuit and is used for protecting during power-on buffering.
Optionally, the power control circuit further comprises: a relay switching sub-circuit, wherein: the relay switching sub-circuit comprises a second relay and a fuse, the second relay comprises a second control coil and a second control switch, the second control coil is connected with the control sub-circuit, and the second control switch is connected with the fuse in series and then connected to two ends of the time delay protection sub-circuit in parallel; and the control sub-circuit is also used for outputting a second control signal to the relay switching sub-circuit according to the first comparison result.
Optionally, the power control circuit further comprises: a temperature sampling sub-circuit, wherein: the temperature sampling sub-circuit is connected with the comparison sub-circuit and is used for collecting a system temperature value and outputting the system temperature value to the comparison sub-circuit; the comparison sub-circuit is also used for receiving the system temperature value, comparing the system temperature value with a preset temperature threshold value, and outputting a second comparison result to the control sub-circuit; the control sub-circuit is specifically configured to output a first control signal to the switch sub-circuit according to the first comparison result and the second comparison result, and output a second control signal to the relay switching sub-circuit according to the first comparison result and the second comparison result.
Optionally, the control sub-circuit comprises a controller and an upper computer, wherein: the controller is respectively connected with the upper computer, the switch sub-circuit and the comparison sub-circuit and used for receiving the control parameters sent by the upper computer, controlling the working states of the switch sub-circuit and the relay switching sub-circuit according to the control parameters and starting the timer, and when the timer reaches preset time, adjusting the working states of the switch sub-circuit and the relay switching sub-circuit according to the first comparison result and the second comparison result of the comparison sub-circuit and sending the current working states of the switch sub-circuit and the relay switching sub-circuit to the upper computer.
Compared with the prior art, the power supply control circuit of the embodiment of the invention acquires the analog current signal or the analog voltage signal through the alternating current sampling sub-circuit, the comparison sub-circuit performs analog-to-digital conversion and compares the analog current signal or the analog voltage signal with the preset voltage threshold, and the control sub-circuit adjusts the on-off state of the switch sub-circuit according to the comparison result, so that the current and voltage abnormal condition of the standby power system is detected, the standby power system has the self-recovery function after the fault is relieved, and the safety and the reliability of the standby power system are improved.
Additional features and advantages of embodiments of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of embodiments of the invention. Further advantages of embodiments of the invention may be realized and attained by the instrumentalities and/or instrumentalities shown in the specification and/or shown in the drawings.
Drawings
The accompanying drawings are included to provide an understanding of the embodiments of the present invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the embodiments of the invention serve to explain the principles of the invention and not to limit the invention.
FIG. 1 is a schematic diagram of a power control circuit according to a first embodiment of the present invention;
FIG. 2 is a schematic diagram of a power control circuit according to a second embodiment of the present invention;
FIG. 3 is a schematic diagram of a power control circuit according to a third embodiment of the present invention;
fig. 4 is a schematic structural diagram of a power control circuit according to a fourth embodiment of the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that the embodiments and features of the embodiments of the present invention may be arbitrarily combined with each other without conflict.
Unless defined otherwise, technical or scientific terms used in the disclosure of the embodiments of the present invention should have the same meaning as commonly understood by one of ordinary skill in the art to which the present invention belongs. The use of "first," "second," and similar language in the embodiments of the present invention does not denote any order, quantity, or importance, but rather the terms "first," "second," and similar language are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that a particular element or item appears in front of the word or is detected by mistake, and that the word or item appears after the word or item and its equivalents, but does not exclude other elements or misdetections.
The embodiment of the invention provides a power supply control circuit, which aims to solve the problems that the existing standby power system is low in safety and does not have a self-recovery function after a fault is relieved. In practical use, the power supply control circuit of the embodiment of the invention can be used for a main power supply system and can also be used for a standby power supply system.
The power control circuit of the embodiment of the invention comprises: the switching sub-circuit is respectively connected with the power input end, the alternating current sampling sub-circuit and the control sub-circuit and is used for receiving a control signal of the control sub-circuit and controlling the on-off state of the switching sub-circuit according to the control signal; the alternating current sampling sub-circuit is respectively connected with the switch sub-circuit, the comparison sub-circuit and the load output end, and is used for collecting an analog current signal or an analog voltage signal and outputting the analog current signal or the analog voltage signal to the comparison sub-circuit; the comparison sub-circuit is respectively connected with the alternating current sampling sub-circuit and the control sub-circuit and is used for converting the analog current signal or the analog voltage signal into a digital voltage signal, comparing the digital voltage signal with a preset voltage threshold value, and outputting a first comparison result to the control sub-circuit; the control sub-circuit is respectively connected with the comparison sub-circuit and the switch sub-circuit and is used for outputting a first control signal to the switch sub-circuit according to a first comparison result.
Compared with the prior art, the power supply control circuit provided by the embodiment of the invention has the advantages that the analog current signal or the analog voltage signal is acquired through the alternating current sampling sub-circuit, the comparison sub-circuit performs analog-to-digital conversion and is compared with the preset voltage threshold, the control sub-circuit adjusts the on-off state of the switch sub-circuit according to the comparison result, the detection of the current and voltage abnormal condition of the standby power system is realized, the standby power system has the self-recovery function after the fault is relieved, and the safety and the reliability of the standby power system are improved.
The power supply control circuit of the embodiment of the application can be realized through various schemes. The technical solutions of the embodiments of the present application are described in detail below with specific examples.
First embodiment
Fig. 1 is a schematic structural diagram of a power control circuit according to a first embodiment of the present application, and as shown in fig. 1, the power control circuit according to the present embodiment includes: the circuit comprises a power input end Vin, a load output end Vout, a switch sub-circuit 101, an alternating current sampling sub-circuit 102, a comparison sub-circuit 103 and a control sub-circuit 104.
The switch sub-circuit 101 is respectively connected with the power input end Vin, the alternating current sampling sub-circuit 102 and the control sub-circuit 104, and is used for receiving a control signal of the control sub-circuit 104 and controlling the on-off state of the switch sub-circuit according to the control signal; the alternating current sampling sub-circuit 102 is respectively connected with the switch sub-circuit 101, the comparison sub-circuit 103 and the load output terminal Vout, and is used for collecting an analog current signal or an analog voltage signal and outputting the analog current signal or the analog voltage signal to the comparison sub-circuit 103; the comparison sub-circuit 103 is respectively connected to the ac sampling sub-circuit 102 and the control sub-circuit 104, and is configured to convert the analog current signal or the analog voltage signal into a digital voltage signal, compare the digital voltage signal with a preset voltage threshold, and output a first comparison result to the control sub-circuit 104; the control sub-circuit 104 is respectively connected to the comparison sub-circuit 103 and the switch sub-circuit 101, and is configured to output a first control signal to the switch sub-circuit 101 according to the first comparison result.
The existing backup power system usually only uses a fuse as a protection scheme of the whole backup power system, and the existing backup power system does not have a function of self-recovery after the fault is relieved. According to the power supply control circuit provided by the embodiment, the alternating current sampling sub-circuit 102 is used for collecting an analog current signal or an analog voltage signal, the comparison sub-circuit 103 is used for performing analog-to-digital conversion and comparing the analog current signal or the analog voltage signal with a preset voltage threshold value, and the control sub-circuit 104 is used for adjusting the on-off state of the switch sub-circuit 101 according to a comparison result, so that the current and voltage abnormal condition of the standby power system is detected, the standby power system has a self-recovery function after the fault is removed, and the safety and the reliability of the standby power system are improved.
In this embodiment, the switch sub-circuit 101 includes a first relay, and the first relay includes a first control coil and a first control switch, and the first control coil is connected with the control sub-circuit 104, and the first control switch is connected with the voltage input terminal and the ac sampling sub-circuit 102, respectively.
Those skilled in the art will readily appreciate that the implementation of the switch sub-circuit 101 is not limited thereto as long as its function can be achieved.
In this embodiment, the ac sampling sub-circuit 102 includes a sampling resistor, a programmable gain amplifier, and an analog filter, where the sampling resistor is disposed on a line connecting the first control switch and the load output terminal Vout; two input ends of the programmable gain amplifier are connected to two ends of the sampling resistor, an output end of the programmable gain amplifier is connected to an input end of the analog filter, and an output end of the analog filter is connected to an input end of the comparison sub-circuit 103.
Those skilled in the art will readily appreciate that the implementation of the ac sampling sub-circuit 102 is not limited thereto, as long as its functionality is achieved.
In this embodiment, the comparison sub-circuit 103 includes an analog-to-digital converter, a comparator and a reference voltage generation unit circuit, an input terminal of the analog-to-digital converter is connected to an output terminal of the analog filter, and an output terminal of the analog-to-digital converter is connected to a first input terminal of the comparator; a second input terminal of the comparator is connected to the reference voltage generating unit circuit, and an output terminal of the comparator is connected to the control sub-circuit 104.
In this embodiment, the analog-to-digital converter is configured to convert the analog current signal or the analog voltage signal into a digital voltage signal, and output the digital voltage signal to the comparator; the comparator is used for comparing the digital voltage signal transmitted by the analog-to-digital converter with a preset voltage threshold value to obtain a first comparison result and outputting the first comparison result to the control sub-circuit 104; the reference voltage generating unit circuit may include an adjustable varistor, and the reference voltage of the comparator may be adjusted by adjusting a resistance value of the adjustable varistor.
Those skilled in the art will readily appreciate that the implementation of the comparison sub-circuit 103 is not limited thereto as long as its function can be achieved.
In this embodiment, the control sub-circuit 104 may include a controller and an upper computer, the controller is connected to the upper computer, the switch sub-circuit 101, and the comparison sub-circuit 103, the controller is configured to receive a control parameter sent by the upper computer, control the operating state of the switch sub-circuit 101 according to the control parameter, start a timer, adjust the operating state of the switch sub-circuit 101 according to a first comparison result of the comparison sub-circuit 103 when the timer reaches a predetermined time, and send the current operating state of the switch sub-circuit 101 to the upper computer.
In this embodiment, the controller may be implemented by a single chip and a peripheral Circuit, and the peripheral Circuit may be composed of a minimum system, an I2C (Inter-Integrated Circuit) communication and IO (Input/Output) port control system. The power supply control circuit of the embodiment can report the working state of the current standby power system to the upper computer in time so as to facilitate the upper computer to monitor and control the standby power system.
Those skilled in the art will readily appreciate that the implementation of the control sub-circuit 104 is not so limited, so long as its functionality is achieved.
In the present embodiment, the comparison sub-circuit 103 and the control sub-circuit 104 may be a separate structure or an integrated structure. Preferably, the comparison sub-circuit 103 and the control sub-circuit 104 are in a separate structure, the comparison sub-circuit 103 is implemented by an analog circuit, and the control sub-circuit 104 is implemented by a digital chip, because the response speed of the analog circuit is faster than that of the digital chip, in this embodiment, the analog circuit performs analog-to-digital conversion and first-stage comparison processing on the acquired analog signal, and then the digital chip performs second-stage comparison processing, so that the response speed of the whole power control circuit can be increased, and the safety and reliability of the standby power system can be further improved.
Second embodiment
Fig. 2 is a schematic structural diagram of a power control circuit according to a second embodiment of the present application. This embodiment is an extension of the first embodiment, and the main structure is substantially the same as that of the first embodiment, except that the power control circuit of this embodiment includes a delay protection sub-circuit. As shown in fig. 2, the power control circuit provided in this embodiment includes: the circuit comprises a power input end Vin, a load output end Vout, a switch sub-circuit 101, a time delay protection sub-circuit 105, an alternating current sampling sub-circuit 102, a comparison sub-circuit 103 and a control sub-circuit 104.
The switch sub-circuit 101 is respectively connected with the power input terminal Vin, the delay protection sub-circuit 105 and the control sub-circuit 104, and is used for receiving a control signal of the control sub-circuit 104 and controlling the on-off state of the switch sub-circuit according to the control signal; the delay protection sub-circuit 105 is respectively connected with the switch sub-circuit 101 and the alternating current sampling sub-circuit 102 and is used for protection during power-on buffering; the alternating current sampling sub-circuit 102 is respectively connected with the delay protection sub-circuit 105, the comparison sub-circuit 103 and the load output end Vout, and is used for collecting an analog current signal or an analog voltage signal and outputting the analog current signal or the analog voltage signal to the comparison sub-circuit 103; the comparison sub-circuit 103 is respectively connected to the ac sampling sub-circuit 102 and the control sub-circuit 104, and is configured to convert the analog current signal or the analog voltage signal into a digital voltage signal, compare the digital voltage signal with a preset voltage threshold, and output a first comparison result to the control sub-circuit 104; the control sub-circuit 104 is respectively connected to the comparison sub-circuit 103 and the switch sub-circuit 101, and is configured to output a first control signal to the switch sub-circuit 101 according to the first comparison result.
Illustratively, the delay protection sub-circuit 105 may comprise a voltage dependent resistor.
The voltage dependent resistor is a resistor device with nonlinear volt-ampere characteristics, and is mainly used for clamping voltage when a circuit bears overvoltage and absorbing redundant current to protect a sensitive device. Those skilled in the art will readily appreciate that the implementation of the delay protection sub-circuit 105 is not limited thereto as long as its functionality is achieved.
The embodiment also achieves the technical effects of the first embodiment, including achieving the detection of the current and voltage abnormal condition of the standby power system, enabling the standby power system to have the self-recovery function after the failure is removed, and improving the safety and reliability of the standby power system. Meanwhile, the delay protection sub-circuit 105 is arranged to buffer the voltage spike at the moment of circuit conduction, so that the effect of protecting equipment is achieved.
Third embodiment
Fig. 3 is a schematic structural diagram of a power control circuit according to a third embodiment of the present application. This embodiment is an extension of the second embodiment, and the main structure is substantially the same as that of the second embodiment, except that the power control circuit of this embodiment includes a relay switching sub-circuit. As shown in fig. 3, the power control circuit provided in this embodiment includes: the circuit comprises a power input end Vin, a load output end Vout, a switch sub-circuit 101, a time delay protection sub-circuit 105, a relay switching sub-circuit 106, an alternating current sampling sub-circuit 102, a comparison sub-circuit 103 and a control sub-circuit 104.
The switch sub-circuit 101 is respectively connected with the power input terminal Vin, the delay protection sub-circuit 105, the relay switching sub-circuit 106 and the control sub-circuit 104, and is used for receiving a control signal of the control sub-circuit 104 and controlling the on-off state of the switch sub-circuit according to the control signal; the delay protection sub-circuit 105 is respectively connected with the switch sub-circuit 101, the relay switching sub-circuit 106 and the alternating current sampling sub-circuit 102 and is used for protection during power-on buffering; the alternating current sampling sub-circuit 102 is respectively connected with the delay protection sub-circuit 105, the relay switching sub-circuit 106, the comparison sub-circuit 103 and the load output end Vout, and is used for collecting an analog current signal or an analog voltage signal and outputting the analog current signal or the analog voltage signal to the comparison sub-circuit 103; the comparison sub-circuit 103 is respectively connected to the ac sampling sub-circuit 102 and the control sub-circuit 104, and is configured to convert the analog current signal or the analog voltage signal into a digital voltage signal, compare the digital voltage signal with a preset voltage threshold, and output a first comparison result to the control sub-circuit 104; the control sub-circuit 104 is respectively connected with the comparison sub-circuit 103, the relay switching sub-circuit 106 and the switch sub-circuit 101, and is configured to output a first control signal to the switch sub-circuit 101 according to the first comparison result, and output a second control signal to the relay switching sub-circuit 106 according to the first comparison result; the relay switching sub-circuit 106 is connected in parallel to two ends of the delay protection sub-circuit 105, and is connected to the control sub-circuit 104, for short-circuiting the delay protection sub-circuit 105 after the circuit is turned on.
In this embodiment, the relay switching sub-circuit 106 may include a second relay and a fuse, the second relay includes a second control coil and a second control switch, the second control coil is connected to the control sub-circuit 104, and the second control switch is connected in series with the fuse and then connected in parallel to two ends of the delay protection sub-circuit 105. Those skilled in the art will readily appreciate that the implementation of the relay switching sub-circuit 106 is not limited thereto as long as its functionality is achieved.
The present embodiment also achieves the technical effects of the foregoing second embodiment, including achieving the current and voltage abnormal condition detection of the backup power system, enabling the backup power system to have the function of self-recovery after the failure is resolved, improving the safety and reliability of the backup power system, and buffering the voltage spike at the moment of circuit conduction through the delay protection sub-circuit 105, thereby playing the role of protecting the device. Meanwhile, by arranging the relay switching sub-circuit 106, after the circuit is conducted, the short-circuit delay protection sub-circuit 105 is connected to the circuit through the relay switching sub-circuit 106, and equipment is protected.
Fourth embodiment
Fig. 4 is a schematic structural diagram of a fourth embodiment of the power control circuit of the present application. This embodiment is an extension of the first, second, or third embodiment, and the main structure is substantially the same as that of the first, second, or third embodiment, except that the power control circuit of this embodiment includes a temperature sampling sub-circuit. As shown in fig. 4, the power control circuit provided in this embodiment includes: the circuit comprises a power input end Vin, a load output end Vout, a switch sub-circuit 101, a time delay protection sub-circuit 105, a relay switching sub-circuit 106, an alternating current sampling sub-circuit 102, a comparison sub-circuit 103, a temperature sampling sub-circuit 107 and a control sub-circuit 104.
The switch sub-circuit 101 is respectively connected with the power input terminal Vin, the delay protection sub-circuit 105, the relay switching sub-circuit 106 and the control sub-circuit 104, and is used for receiving a control signal of the control sub-circuit 104 and controlling the on-off state of the switch sub-circuit according to the control signal; the delay protection sub-circuit 105 is respectively connected with the switch sub-circuit 101, the relay switching sub-circuit 106 and the alternating current sampling sub-circuit 102 and is used for protection during power-on buffering; the alternating current sampling sub-circuit 102 is respectively connected with the delay protection sub-circuit 105, the relay switching sub-circuit 106, the comparison sub-circuit 103 and the load output end Vout, and is used for collecting an analog current signal or an analog voltage signal and outputting the analog current signal or the analog voltage signal to the comparison sub-circuit 103; the temperature sampling sub-circuit 107 is connected with the comparison sub-circuit 103, and is used for collecting a system temperature value and outputting the system temperature value to the comparison sub-circuit 103; the comparison sub-circuit 103 is respectively connected to the ac sampling sub-circuit 102, the temperature sampling sub-circuit 107, and the control sub-circuit 104, and is configured to convert an analog current signal or an analog voltage signal into a digital voltage signal, compare the digital voltage signal with a preset voltage threshold, obtain a first comparison result, output the first comparison result to the control sub-circuit 104, compare the system temperature value with the preset temperature threshold, obtain a second comparison result, and output the second comparison result to the control sub-circuit 104; the control sub-circuit 104 is respectively connected with the comparison sub-circuit 103, the relay switching sub-circuit 106 and the switch sub-circuit 101, and is configured to output a first control signal to the switch sub-circuit 101 according to the first comparison result and the second comparison result, and output a second control signal to the relay switching sub-circuit 106 according to the first comparison result and the second comparison result; the relay switching sub-circuit 106 is connected in parallel to two ends of the delay protection sub-circuit 105, and is connected to the control sub-circuit 104, for short-circuiting the delay protection sub-circuit 105 after the circuit is turned on.
In this embodiment, the temperature sampling sub-circuit 107 may include a plurality of temperature measuring elements or infrared temperature measuring modules, and the temperature measuring elements may be thermistors or any other types of temperature measuring elements. The temperature measuring element or the infrared temperature measuring module can be arranged on the surface of a power supply of the standby power system or at the air outlet of the standby power system.
Those skilled in the art will readily appreciate that the implementation of the temperature sampling sub-circuit 107 is not so limited, so long as its functionality is achieved.
The present embodiment also achieves the technical effects of the first, second, or third embodiments, including achieving the current and voltage abnormal condition detection of the backup power system, and making the backup power system have the self-recovery function after the failure is resolved, thereby improving the safety and reliability of the backup power system, buffering the voltage spike at the moment of circuit conduction through the delay protection sub-circuit 105, and playing a role of protecting the device, after the circuit conduction through the relay switching sub-circuit 106, the short-circuit delay protection sub-circuit 105 is accessed to the circuit through the relay switching sub-circuit 106, protecting the device, and meanwhile, by setting the temperature sampling sub-circuit 107, further enhancing the safety and reliability of the backup power system.
The following points need to be explained:
the drawings of the embodiments of the invention only relate to the structures related to the embodiments of the invention, and other structures can refer to common designs.
Without conflict, features of embodiments of the present invention, that is, embodiments, may be combined with each other to arrive at new embodiments.
Although the embodiments of the present invention have been described above, the above description is only for the convenience of understanding the present invention, and is not intended to limit the present invention. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (8)
1. The utility model provides a power control circuit which characterized in that, includes power input end, load output, switch sub-circuit, exchanges sample sub-circuit, comparison sub-circuit and control sub-circuit, wherein:
the switch sub-circuit is respectively connected with the power input end, the alternating current sampling sub-circuit and the control sub-circuit and is used for receiving the control signal of the control sub-circuit and controlling the on-off state of the switch sub-circuit according to the control signal;
the alternating current sampling sub-circuit is respectively connected with the switch sub-circuit, the comparison sub-circuit and the load output end, and is used for collecting an analog current signal or an analog voltage signal and outputting the analog current signal or the analog voltage signal to the comparison sub-circuit;
the comparison sub-circuit is respectively connected with the alternating current sampling sub-circuit and the control sub-circuit and is used for converting the analog current signal or the analog voltage signal into a digital voltage signal, comparing the digital voltage signal with a preset voltage threshold value to obtain a first comparison result and outputting the first comparison result to the control sub-circuit;
the control sub-circuit is respectively connected with the comparison sub-circuit and the switch sub-circuit and is used for outputting a first control signal to the switch sub-circuit according to the first comparison result.
2. The power control circuit of claim 1, wherein the switch sub-circuit comprises a first relay comprising a first control coil and a first control switch, wherein:
the first control coil is connected with the control sub-circuit, and the first control switch is respectively connected with the voltage input end and the alternating current sampling sub-circuit.
3. The power control circuit of claim 1, wherein the ac sampling sub-circuit comprises a sampling resistor, a programmable gain amplifier, and an analog filter, wherein:
the sampling resistor is arranged on a line connecting the switch sub-circuit and the load output end;
two input ends of the programmable gain amplifier are connected to two ends of the sampling resistor, and an output end of the programmable gain amplifier is connected to an input end of the analog filter;
the output end of the analog filter is connected to the input end of the comparison sub-circuit.
4. The power control circuit of claim 1, wherein the comparison sub-circuit comprises an analog-to-digital converter, a comparator, and a reference voltage generation unit circuit, wherein:
the input end of the analog-to-digital converter is connected to the output end of the comparison sub-circuit, and the output end of the analog-to-digital converter is connected to the first input end of the comparator;
the second input end of the comparator is connected to the reference voltage generating unit circuit, and the output end of the comparator is connected to the control sub-circuit.
5. The power control circuit of claim 1, further comprising: a delay protection sub-circuit, wherein:
and the time delay protection sub-circuit is respectively connected with the switch sub-circuit and the alternating current sampling sub-circuit and is used for protecting during power-on buffering.
6. The power control circuit of claim 5, further comprising: a relay switching sub-circuit, wherein:
the relay switching sub-circuit comprises a second relay and a fuse, the second relay comprises a second control coil and a second control switch, the second control coil is connected with the control sub-circuit, and the second control switch is connected with the fuse in series and then connected to two ends of the time delay protection sub-circuit in parallel;
and the control sub-circuit is also used for outputting a second control signal to the relay switching sub-circuit according to the first comparison result.
7. The power control circuit of claim 6, further comprising: a temperature sampling sub-circuit, wherein:
the temperature sampling sub-circuit is connected with the comparison sub-circuit and is used for collecting a system temperature value and outputting the system temperature value to the comparison sub-circuit;
the comparison sub-circuit is also used for receiving the system temperature value, comparing the system temperature value with a preset temperature threshold value, and outputting a second comparison result to the control sub-circuit;
the control sub-circuit is specifically configured to output a first control signal to the switch sub-circuit according to the first comparison result and the second comparison result, and output a second control signal to the relay switching sub-circuit according to the first comparison result and the second comparison result.
8. The power control circuit of claim 7, wherein the control sub-circuit comprises a controller and an upper computer, wherein:
the controller is respectively connected with the upper computer, the switch sub-circuit and the comparison sub-circuit and used for receiving the control parameters sent by the upper computer, controlling the working states of the switch sub-circuit and the relay switching sub-circuit according to the control parameters and starting the timer, and when the timer reaches preset time, adjusting the working states of the switch sub-circuit and the relay switching sub-circuit according to the first comparison result and the second comparison result of the comparison sub-circuit and sending the current working states of the switch sub-circuit and the relay switching sub-circuit to the upper computer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911203755.0A CN110854991A (en) | 2019-11-29 | 2019-11-29 | Power supply control circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911203755.0A CN110854991A (en) | 2019-11-29 | 2019-11-29 | Power supply control circuit |
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| CN110854991A true CN110854991A (en) | 2020-02-28 |
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| CN201911203755.0A Pending CN110854991A (en) | 2019-11-29 | 2019-11-29 | Power supply control circuit |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111537907A (en) * | 2020-05-15 | 2020-08-14 | 北京小米移动软件有限公司 | Power on-off detection circuit, method and device and storage medium |
| CN114333656A (en) * | 2021-12-10 | 2022-04-12 | 北京镁伽科技有限公司 | Power supply self-checking system, adjustable voltage source and image signal generator |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56108965A (en) * | 1980-02-01 | 1981-08-28 | Hitachi Ltd | Overcurrent detecting system |
| US5933305A (en) * | 1998-06-02 | 1999-08-03 | Eaton Corporation | Arc fault detector comparing integrated interval to interval filtered load current and circuit breaker incorporating same |
| CN204205545U (en) * | 2014-09-30 | 2015-03-11 | 深圳中兴力维技术有限公司 | Power overcurrent protection circuit |
| CN105811776A (en) * | 2016-03-16 | 2016-07-27 | 阳光电源股份有限公司 | Switching power supply circuit |
| CN206379765U (en) * | 2016-12-21 | 2017-08-04 | 苏州格远电气有限公司 | The charging device of wind power pitch-controlled system back-up source |
| CN107134758A (en) * | 2017-05-08 | 2017-09-05 | 哈尔滨工业大学 | Cmos device single event latch-up effect protector under a kind of space environment |
| CN207234697U (en) * | 2017-07-10 | 2018-04-13 | 广东芬尼克兹节能设备有限公司 | A kind of wind turbine SS (soft start) control circuit |
| CN108199452A (en) * | 2018-02-09 | 2018-06-22 | 重庆长安汽车股份有限公司 | The circuit and its control method that a kind of anti-battery pack is poured in down a chimney |
| CN208044448U (en) * | 2018-05-04 | 2018-11-02 | 浙江德力西电器有限公司 | A kind of AC voltage regulator |
| CN208158100U (en) * | 2018-04-24 | 2018-11-27 | 广州金升阳科技有限公司 | A kind of output overvoltage protection circuit and the power supply comprising the circuit |
| CN209516620U (en) * | 2018-12-14 | 2019-10-18 | 厦门高瑞特电气自动化有限公司 | A kind of output protection circuit of DC power supply |
-
2019
- 2019-11-29 CN CN201911203755.0A patent/CN110854991A/en active Pending
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56108965A (en) * | 1980-02-01 | 1981-08-28 | Hitachi Ltd | Overcurrent detecting system |
| US5933305A (en) * | 1998-06-02 | 1999-08-03 | Eaton Corporation | Arc fault detector comparing integrated interval to interval filtered load current and circuit breaker incorporating same |
| CN204205545U (en) * | 2014-09-30 | 2015-03-11 | 深圳中兴力维技术有限公司 | Power overcurrent protection circuit |
| CN105811776A (en) * | 2016-03-16 | 2016-07-27 | 阳光电源股份有限公司 | Switching power supply circuit |
| CN206379765U (en) * | 2016-12-21 | 2017-08-04 | 苏州格远电气有限公司 | The charging device of wind power pitch-controlled system back-up source |
| CN107134758A (en) * | 2017-05-08 | 2017-09-05 | 哈尔滨工业大学 | Cmos device single event latch-up effect protector under a kind of space environment |
| CN207234697U (en) * | 2017-07-10 | 2018-04-13 | 广东芬尼克兹节能设备有限公司 | A kind of wind turbine SS (soft start) control circuit |
| CN108199452A (en) * | 2018-02-09 | 2018-06-22 | 重庆长安汽车股份有限公司 | The circuit and its control method that a kind of anti-battery pack is poured in down a chimney |
| CN208158100U (en) * | 2018-04-24 | 2018-11-27 | 广州金升阳科技有限公司 | A kind of output overvoltage protection circuit and the power supply comprising the circuit |
| CN208044448U (en) * | 2018-05-04 | 2018-11-02 | 浙江德力西电器有限公司 | A kind of AC voltage regulator |
| CN209516620U (en) * | 2018-12-14 | 2019-10-18 | 厦门高瑞特电气自动化有限公司 | A kind of output protection circuit of DC power supply |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111537907A (en) * | 2020-05-15 | 2020-08-14 | 北京小米移动软件有限公司 | Power on-off detection circuit, method and device and storage medium |
| CN114333656A (en) * | 2021-12-10 | 2022-04-12 | 北京镁伽科技有限公司 | Power supply self-checking system, adjustable voltage source and image signal generator |
| CN114333656B (en) * | 2021-12-10 | 2023-12-12 | 北京镁伽科技有限公司 | Power self-checking system, adjustable voltage source and image signal generator |
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Application publication date: 20200228 |