CN113595419B - Relay protection device power panel and configuration method thereof - Google Patents
Relay protection device power panel and configuration method thereof Download PDFInfo
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- CN113595419B CN113595419B CN202110671783.6A CN202110671783A CN113595419B CN 113595419 B CN113595419 B CN 113595419B CN 202110671783 A CN202110671783 A CN 202110671783A CN 113595419 B CN113595419 B CN 113595419B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
- H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
- H02M7/12—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/21—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/217—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M7/23—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only arranged for operation in parallel
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/10—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers
- H02H7/12—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers
- H02H7/125—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers for rectifiers
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
- H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
- H02M7/12—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/21—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/217—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M7/219—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only in a bridge configuration
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Emergency Protection Circuit Devices (AREA)
- Dc-Dc Converters (AREA)
Abstract
The invention provides a power panel of a relay protection device and a configuration method thereof, wherein the power panel and the configuration method respectively receive first output signals of a power supply through 2 first filter units connected in parallel to the power supply, then the first output signals are transmitted to a transformer for voltage adjustment and then output, and finally the output signals are output to electric equipment after synchronous rectification or diode rectification. According to the relay protection device power panel and the configuration method thereof, the power panel and the configuration method thereof are used for doubly configuring the power panel, so that the fault rate of the panel is effectively reduced, and the reliability of the whole device is greatly improved.
Description
Technical Field
The invention relates to the field of power system protection and control, in particular to a power panel of a relay protection device and a configuration method thereof.
Background
In recent years, among defects of a relay protection device body, a defect part with the largest ratio is a CPU, and the second ratio is a power supply plug-in. With the implementation of dual configuration of the CPU, the drawbacks of the CPU are relatively greatly improved, but the problem of the power plug-in is highlighted in recent years compared to other chips. As one of the most core boards of the relay protection device, its stability and reliability greatly determine the stability and reliability of the overall device, but at present, the following disadvantages still exist: firstly, the failure rate of the power panel is high, secondly, after the power chip is domesticated, the performance reliability of the power panel is reduced, and the long-term operation stability is still to be practically checked.
Disclosure of Invention
In order to solve the technical problem of low stability of a complete machine device caused by high failure rate of a power plug-in unit in the prior art, the invention provides a power panel of a relay protection device, which comprises:
the 2 first filtering units are connected in parallel to the power supply and are used for receiving a first output signal of the power supply, generating a second output signal after EMI filtering and transmitting the second output signal to the first rectifying unit;
the 2 first rectifying units are respectively connected with one first filtering unit and are used for receiving the second output signals of the first filtering units, generating third output signals after full-bridge rectification and transmitting the third output signals to the second filtering units;
the 2 second filter units are respectively connected with one first rectifying unit and are used for receiving the third output signal of the first rectifying unit, generating a fourth output signal after capacitive filtering, and transmitting the fourth output signal to the transformer;
and the 2 transformers are respectively connected with one second filtering unit, wherein the primary side of the transformer receives the fourth output signal of the second filtering unit, generates a fifth output signal through the secondary side after transformation, and transmits the fifth output signal to electric equipment.
Further, the power supplies connected in parallel with the 2 first filtering units comprise 110V or 220V power supplies, and the power supplies are alternating current power supplies or direct current power supplies.
Further, the power panel further comprises a Y capacitor connected with the output end of the secondary side of the transformer, and the Y capacitor is grounded and used for reducing electromagnetic interference.
Further, the power panel further includes:
the quasi-resonance control chip and the MOS tube are respectively connected with the primary side of the transformer, the quasi-resonance control chip is connected with the MOS tube, the primary side quasi-resonance control chip is used for detecting a voltage waveform on the MOS tube connected with the primary side to determine the on time when a fourth output signal is input into the primary side of the transformer, and the secondary side generates a fifth output signal according to the on of the primary side MOS tube;
the second rectifying unit is connected with the secondary side of the transformer and is used for rectifying the fifth output signal to generate a sixth output signal and transmitting the sixth output signal to electric equipment, wherein the fifth output signal is subjected to synchronous rectification and then outputs a 5V voltage signal, and the fifth output signal is subjected to diode rectification and then outputs a 24V voltage signal.
Further, the power panel further comprises a feedback circuit and a protection circuit, the feedback circuit is connected with the output end of the second rectifying unit and is used for receiving a sixth output signal of the second rectifying unit, the feedback circuit outputs the sixth output signal to the primary quasi-resonance control chip, the quasi-resonance control chip generates a control instruction according to the received sixth output signal and transmits the control instruction to the protection circuit, and the protection circuit cuts off the sixth output signal according to the control instruction.
According to another aspect of the present invention, there is provided a method for configuring a power panel of a relay protection device, the method including:
the 2 first filter units connected in parallel to the power supply respectively receive first output signals of the power supply;
the first output signal is subjected to EMI filtering to generate a second output signal;
the second output signal is subjected to full-bridge rectification to generate a third output signal;
the third output signal is subjected to capacitive filtering to generate a fourth output signal;
the fourth output signal is input into the primary side of the transformer, the secondary side generates a fifth output signal after transformation, and the fifth output signal is transmitted to electric equipment.
Further, the power supplies connected in parallel with the 2 first filtering units comprise 110V or 220V power supplies, and the power supplies are alternating current power supplies or direct current power supplies.
Further, the fourth output signal is input to the primary side of the transformer, and the secondary side after transformation generates a fifth output signal, and then the fifth output signal is connected with a Y capacitor, where the Y capacitor is grounded and used for reducing electromagnetic interference.
Further, the fourth output signal is input to the primary side of the transformer, the transformed secondary side generates a fifth output signal, and the fifth output signal is transmitted to the electric device, which includes:
the fourth output signal is input to the primary side of the transformer, and the primary side quasi-resonance control chip detects the voltage waveform on the MOS tube connected with the primary side to determine the on time;
the secondary side generates a fifth output signal according to the opening of the primary side MOS tube;
the fifth output signal is rectified to generate a sixth output signal, and the sixth output signal is transmitted to electric equipment, wherein the fifth output signal is synchronously rectified to output a 5V voltage signal, and the fifth output signal is rectified by a diode to output a 24V voltage signal.
Further, before the sixth output signal is transmitted to the electric device, the method further includes:
outputting a sixth output signal to the feedback circuit and the protection circuit, and outputting the sixth output signal to the primary quasi-resonance control chip by the feedback circuit;
the quasi-resonance control chip generates a control instruction according to the received sixth output signal and transmits the control instruction to the protection circuit;
the protection circuit cuts off the sixth output signal according to the control instruction.
According to the relay protection device power panel and the configuration method thereof, the power supply 2 first filter units are connected in parallel to respectively receive first output signals of the power supply, then the first output signals are subjected to full-bridge rectification and capacitive filtering, are transmitted to the transformer to be subjected to voltage adjustment and output, and finally are subjected to synchronous rectification or diode rectification and output to electric equipment. According to the relay protection device power panel and the configuration method thereof, the power panel and the configuration method thereof are used for doubly configuring the power panel, so that the fault rate of the panel is effectively reduced, and the reliability of the whole device is greatly improved.
Drawings
Exemplary embodiments of the present invention may be more completely understood in consideration of the following drawings:
fig. 1 is a schematic structural view of a power panel of a relay protection device according to a preferred embodiment of the present invention;
fig. 2 is an example of a power panel to which a relay protection device is applied according to a preferred embodiment of the present invention;
fig. 3 is another example of a power panel to which a relay protection device is applied according to a preferred embodiment of the present invention;
fig. 4 is a schematic diagram illustrating still another example of a power panel to which the relay protection apparatus is applied according to the preferred embodiment of the present invention;
fig. 5 is a flowchart of a method of configuring a power strip of a relay protection device according to a preferred embodiment of the present invention;
Detailed Description
The exemplary embodiments of the present invention will now be described with reference to the accompanying drawings, however, the present invention may be embodied in many different forms and is not limited to the examples described herein, which are provided to fully and completely disclose the present invention and fully convey the scope of the invention to those skilled in the art. The terminology used in the exemplary embodiments illustrated in the accompanying drawings is not intended to be limiting of the invention. In the drawings, like elements/components are referred to by like reference numerals.
Unless otherwise indicated, terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art. In addition, it will be understood that terms defined in commonly used dictionaries should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense.
Fig. 1 is a schematic structural diagram of a power panel of a relay protection device according to a preferred embodiment of the present invention. As shown in fig. 1, a power panel 100 of a relay protection device according to the present preferred embodiment includes:
the 2 first filtering units 101 are connected in parallel to the power supply, and are used for receiving a first output signal of the power supply, generating a second output signal after being subjected to EMI filtering, and transmitting the second output signal to the first rectifying unit 102;
the 2 first rectifying units 102 are respectively connected with one first filtering unit 101, and are used for receiving the second output signal of the first filtering unit 101, generating a third output signal after full-bridge rectification, and transmitting the third output signal to the second filtering unit 103;
the 2 second filtering units 103 are respectively connected with one first rectifying unit 102, and are used for receiving the third output signal of the first rectifying unit 102, generating a fourth output signal after capacitive filtering, and transmitting the fourth output signal to the transformer 104;
and 2 transformers 104, which are respectively connected with one second filtering unit 103, wherein the primary side of the transformer receives the fourth output signal of the second filtering unit 103, generates a fifth output signal through the secondary side after transformation, and transmits the fifth output signal to the electric equipment.
And the Y capacitor 105 is connected with the output end of the secondary side of the transformer, and is grounded for reducing electromagnetic interference.
The quasi-resonance control chip 106 and the MOS tube 107, wherein the quasi-resonance control chip 106 and the MOS tube 107 are respectively connected with the primary side of the transformer 104, the quasi-resonance control chip 106 is connected with the MOS tube 107, the primary side quasi-resonance control chip 106 is used for detecting a voltage waveform on the MOS tube 107 connected with the primary side to determine the on time when a fourth output signal is input into the primary side of the transformer, and the secondary side generates a fifth output signal according to the on of the primary side MOS tube;
the second rectifying unit 108 is connected to the secondary side of the transformer, and is configured to rectify the fifth output signal to generate a sixth output signal, and transmit the sixth output signal to the electric device, where the fifth output signal is rectified by the synchronous rectifier to output a 5V voltage signal, and the fifth output signal is rectified by the diode to output a 24V voltage signal.
The feedback circuit 109 and the protection circuit 110 are connected to the output end of the second rectifying unit 108, and are configured to receive the sixth output signal of the second rectifying unit 108, and the feedback circuit 109 outputs the sixth output signal to the primary quasi-resonant control chip 106, the quasi-resonant control chip 106 generates a control instruction according to the received sixth output signal, and transmits the control instruction to the protection circuit 110, and the protection circuit 110 switches on the sixth output signal according to the control instruction.
The stability and reliability of the power protection are very important in the power supply of the device, and the reliability, service life and anti-interference capability of the protection circuit are higher than those of other devices of the power supply. For this reason, the protection circuit must be formed by discrete components, i.e., low-failure-rate devices such as resistors, capacitors, diodes, voltage regulators, transistors, optocouplers, etc.
Preferably, the power sources to which the 2 first filter units 101 are connected in parallel include 110V or 220V power sources, and the power sources are ac power sources or dc power sources.
Fig. 2 is an example of a power panel to which a relay protection device is applied according to a preferred embodiment of the present invention. In this embodiment, as shown in fig. 2, for the dual-configuration CPU, the power board of the relay protection device of the present invention includes two sets of circuits, one of which is powered by the output of the protection CPU board and the other of which is powered by the start CPU board.
Fig. 3 is another example of a power panel to which the relay protection device is applied according to the preferred embodiment of the present invention. In this embodiment, as shown in fig. 3, since the power panel of the relay protection device according to the present invention includes two sets of circuits, each set of circuits includes two outputs, one of which is 24V and one of which is 5V, the high-voltage on-off board may be supplied with power via the 24V output terminal of one set of circuits, and the low-voltage 5V board may be supplied with power via the 5V output terminal of the other set of circuits.
Fig. 4 is a schematic diagram of still another example of a power panel to which the relay protection apparatus is applied according to the preferred embodiment of the present invention. In this embodiment, as shown in fig. 5, the power panel of the relay protection device in the present invention includes two sets of circuits, where each set of circuits includes two outputs, one output is 24V, and the other output is 5V, so that, for any device board card needing power supply, the dual configuration of the power supply can be implemented by connecting two outputs with the same output voltage in parallel, so that when the output of one set of circuits fails, the output of the other set of circuits is used as a standby power supply in time, and long-term stability of the power supply operation is implemented.
Fig. 5 is a flowchart of a method of configuring a power strip of a relay protection device according to a preferred embodiment of the present invention. As shown in fig. 5, a method 500 for configuring a power panel of a relay protection device according to the preferred embodiment starts in step 501.
In step 501, 2 first filter units connected in parallel to the power supply respectively receive first output signals of the power supply.
In step 502, the first output signal is EMI filtered to generate a second output signal.
In step 503, the second output signal is subjected to full bridge rectification to generate a third output signal. The full-bridge rectification is adopted, so that alternating current power supply can be conveniently carried out, and the normal operation of the circuit is ensured under the condition of reverse input connection.
In step 504, the third output signal is capacitively filtered to generate a fourth output signal.
In step 505, the fourth output signal is input to the primary side of the transformer, and the transformed secondary side generates a fifth output signal, and the fifth output signal is transmitted to the electric device.
Preferably, the power supplies connected in parallel with the 2 first filtering units comprise 110V or 220V power supplies connected in parallel with two relay protection device power boards, and the power supplies are alternating current power supplies or direct current power supplies.
Preferably, the fourth output signal is input to the primary side of the transformer, and the secondary side after transformation generates the fifth output signal, and then the fifth output signal is connected to a Y capacitor, where the Y capacitor is grounded, so as to reduce electromagnetic interference.
Preferably, the fourth output signal is input to the primary side of the transformer, the transformed secondary side generates a fifth output signal, and the fifth output signal is transmitted to the electric device, which includes:
the fourth output signal is input to the primary side of the transformer, and the primary side quasi-resonance control chip detects the voltage waveform on the MOS tube connected with the primary side to determine the on time;
the secondary side generates a fifth output signal according to the opening of the primary side MOS tube;
the fifth output signal is rectified to generate a sixth output signal, and the sixth output signal is transmitted to electric equipment, wherein the fifth output signal is synchronously rectified to output a 5V voltage signal, and the fifth output signal is rectified by a diode to output a 24V voltage signal.
In the preferred embodiment, the method adopts a flyback circuit, the primary side of the transformer is composed of a quasi-resonance control chip and an MOS tube, and the quasi-resonance control chip determines the on time by detecting the voltage waveform on the MOS tube, so that the on loss on the MOS tube can be greatly reduced. The 5V output of the secondary side of the transformer adopts synchronous rectification technology. The 24V was rectified using a fast recovery diode. The highest efficiency of the flyback power supply can be achieved by adopting the combination of the quasi-resonant chip and the synchronous rectification chip.
Preferably, before the sixth output signal is transmitted to the electric device, the method further includes:
outputting a sixth output signal to the feedback circuit and the protection circuit, and outputting the sixth output signal to the primary quasi-resonance control chip by the feedback circuit;
the quasi-resonance control chip generates a control instruction according to the received sixth output signal and transmits the control instruction to the protection circuit;
the protection circuit cuts off the sixth output signal according to the control instruction.
The method for configuring the power panel of the relay protection device in the preferred embodiment has complete protection functions, wherein the protection functions comprise input starting and return protection, output overvoltage, undervoltage and short-circuit protection and over-power protection.
The invention has been described with reference to a few embodiments. However, as is well known to those skilled in the art, other embodiments than the above disclosed invention are equally possible within the scope of the invention, as defined by the appended patent claims.
Generally, all terms used in the claims are to be interpreted according to their ordinary meaning in the technical field, unless explicitly defined otherwise therein. All references to "a/an/the [ means, component, etc. ]" are to be interpreted openly as referring to at least one instance of said means, component, etc., unless explicitly stated otherwise. The steps of any method disclosed herein do not have to be performed in the exact order disclosed, unless explicitly stated.
It will be appreciated by those skilled in the art that embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
Finally, it should be noted that: the above embodiments are only for illustrating the technical aspects of the present invention and not for limiting the same, and although the present invention has been described in detail with reference to the above embodiments, it should be understood by those of ordinary skill in the art that: modifications and equivalents may be made to the specific embodiments of the invention without departing from the spirit and scope of the invention, which is intended to be covered by the claims.
Claims (6)
1. The utility model provides a relay protection device power strip which characterized in that, the power strip includes:
the 2 first filtering units are connected in parallel to the power supply and are used for receiving a first output signal of the power supply, generating a second output signal after EMI filtering and transmitting the second output signal to the first rectifying unit;
the 2 first rectifying units are respectively connected with one first filtering unit and are used for receiving the second output signals of the first filtering units, generating third output signals after full-bridge rectification and transmitting the third output signals to the second filtering units;
the 2 second filter units are respectively connected with one first rectifying unit and are used for receiving the third output signal of the first rectifying unit, generating a fourth output signal after capacitive filtering, and transmitting the fourth output signal to the transformer;
the transformers are respectively connected with one second filtering unit, wherein the primary side of each transformer receives a fourth output signal of the second filtering unit, and a fifth output signal is generated by the secondary side after transformation;
the quasi-resonance control chip and the MOS tube are respectively connected with the primary side of the transformer, the quasi-resonance control chip is connected with the MOS tube, the primary side quasi-resonance control chip is used for detecting a voltage waveform on the MOS tube connected with the primary side to determine the on time when a fourth output signal is input into the primary side of the transformer, and the secondary side generates a fifth output signal according to the on of the primary side MOS tube;
the second rectifying unit is connected with the secondary side of the transformer and is used for rectifying a fifth output signal to generate a sixth output signal and transmitting the sixth output signal to electric equipment, wherein the fifth output signal is subjected to synchronous rectification and then outputs a 5V voltage signal, and the fifth output signal is subjected to diode rectification and then outputs a 24V voltage signal;
the feedback circuit is connected with the output end of the second rectifying unit and is used for receiving a sixth output signal of the second rectifying unit, the feedback circuit outputs the sixth output signal to the primary quasi-resonance control chip, the quasi-resonance control chip generates a control instruction according to the received sixth output signal and transmits the control instruction to the protection circuit, and the protection circuit cuts off the sixth output signal according to the control instruction.
2. The power strip of claim 1, wherein the power sources to which the 2 first filter units are connected in parallel include a 110V or 220V power supply, and the power supply is an ac power source or a dc power source.
3. The power strip of claim 1, further comprising a Y capacitor connected to the output of the secondary side of the transformer, the Y capacitor being grounded for reducing electromagnetic interference.
4. A method of configuring a power strip of a relay protection device, the method comprising:
the 2 first filter units connected in parallel to the power supply respectively receive first output signals of the power supply;
the first output signal is subjected to EMI filtering to generate a second output signal;
the second output signal is subjected to full-bridge rectification to generate a third output signal;
the third output signal is subjected to capacitive filtering to generate a fourth output signal;
the fourth output signal is input to the primary side of the transformer, the secondary side generates a fifth output signal after transformation, and the fifth output signal is transmitted to the electric equipment, and the method comprises the following steps:
the fourth output signal is input to the primary side of the transformer, and the primary side quasi-resonance control chip detects the voltage waveform on the MOS tube connected with the primary side to determine the on time;
the secondary side generates a fifth output signal according to the opening of the primary side MOS tube;
the fifth output signal is rectified to generate a sixth output signal, wherein the fifth output signal is synchronously rectified to output a 5V voltage signal, and the fifth output signal is rectified by a diode to output a 24V voltage signal;
outputting a sixth output signal to the feedback circuit and the protection circuit, and outputting the sixth output signal to the primary quasi-resonance control chip by the feedback circuit;
the quasi-resonance control chip generates a control instruction according to the received sixth output signal and transmits the control instruction to the protection circuit;
the protection circuit cuts off a sixth output signal according to the control instruction;
and transmitting the sixth output signal to the electric equipment.
5. The method of claim 4, wherein the power source to which the 2 first filter units are connected in parallel includes a 110V or 220V power source, and the power source is an ac power source or a dc power source.
6. The method of claim 4, wherein the fourth output signal is input to a primary side of the transformer, and the secondary side is transformed to generate a fifth output signal, and further comprising connecting the fifth output signal to a Y capacitor, the Y capacitor being grounded for reducing electromagnetic interference.
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| CN106394538A (en) * | 2016-11-02 | 2017-02-15 | 中车株洲电力机车有限公司 | Locomotive brake control unit and locomotive |
| CN206650594U (en) * | 2017-04-19 | 2017-11-17 | 深圳Tcl数字技术有限公司 | Pfc circuit and supply unit |
| CN110995478A (en) * | 2019-11-21 | 2020-04-10 | 北京国科环宇科技股份有限公司 | Method for implementing redundant backup of board card in OpenVPX equipment |
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