CN110944430A - Power supply circuit - Google Patents
Power supply circuit Download PDFInfo
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- CN110944430A CN110944430A CN201910588246.8A CN201910588246A CN110944430A CN 110944430 A CN110944430 A CN 110944430A CN 201910588246 A CN201910588246 A CN 201910588246A CN 110944430 A CN110944430 A CN 110944430A
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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
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]
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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
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
Abstract
The application provides a power supply circuit, including alternating current-direct current converting circuit, at least one drive circuit and bypass protection circuit. The alternating current-direct current conversion circuit is used for receiving electric energy output by the alternating current power supply and converting the electric energy into first driving voltage. The bypass protection circuit is connected in parallel with two ends of the alternating current-direct current conversion circuit. The bypass protection circuit is used for receiving the electric energy and converting the electric energy into a second driving voltage. The input end of each driving circuit is electrically connected with the output end of the alternating current-direct current conversion circuit. The output end of each driving circuit is electrically connected with a luminous load. The driving circuit receives and works according to the first driving voltage or the second driving voltage. The alternating current power supply can output the electric energy provided by the alternating current power supply to the luminous load on line in real time, so that the alternating current and direct current switching process is ensured to have no time delay, and the reliability is greatly improved.
Description
Technical Field
The application relates to the technical field of lighting, in particular to a power supply circuit.
Background
In the existing dc lighting system, most methods convert a three-phase 380Vac or a single-phase 220Vac into a dc output through an ac-to-dc conversion device, and then the dc output is used as a power supply and transmitted to each lamp through a cable. Wherein the lamp has three kinds which are only suitable for ac input, only suitable for dc input and suitable for both ac and dc input. Because the alternating current-to-direct current device is connected in series in the whole lighting system, if the alternating current-to-direct current device fails, the whole lighting system fails, and the lamp cannot be normally lightened. Therefore, the reliability of the AC-DC conversion device is the most important of the DC lighting system.
In the existing lighting system, the reliability of the whole system is ensured by trying to improve the reliability of an alternating current to direct current device through various mechanisms. On one hand, the reliability of the AC-DC conversion device is high, and the AC-DC conversion device is only close to the original AC lighting system; on the other hand, the reliability of the ac-to-dc apparatus is improved, which often means more complicated design and higher cost.
Therefore, it is necessary to provide a device with simple design, low cost and high reliability to ensure that the reliability of the whole dc lighting system is not lower than that of the original ac lighting system.
Disclosure of Invention
In view of this, it is necessary to provide a power supply circuit for solving the problem of low reliability of the conventional dc lighting system.
A power supply circuit comprising:
the alternating current-direct current conversion circuit is used for receiving electric energy output by the alternating current power supply and converting the electric energy into first driving voltage;
the bypass protection circuit is connected in parallel to two ends of the alternating current-direct current conversion circuit and used for receiving the electric energy and converting the electric energy into a second driving voltage; and
the input end of each driving circuit is electrically connected with the output end of the alternating current-direct current conversion circuit, and the output end of each driving circuit is electrically connected with a luminous load;
the driving circuit is used for receiving the first driving voltage or the second driving voltage and working according to the first driving voltage or the second driving voltage.
In one embodiment, each of the driving circuits receives the first driving voltage when the first driving voltage is greater than or equal to a peak value of the second driving voltage; or
When the first driving voltage is smaller than the peak value of the second driving voltage, each driving circuit alternately receives the first driving voltage and the second driving voltage.
In one embodiment, each of the driving circuits receives the second driving voltage when the ac-dc conversion circuit fails.
In one embodiment, when the ac-dc conversion circuit recovers to normal operation from a fault and the first driving voltage is greater than or equal to the peak value of the second driving voltage, each driving circuit receives the first driving voltage; or
When the first driving voltage is smaller than the peak value of the second driving voltage, each driving circuit alternately receives the first driving voltage and the second driving voltage.
In one embodiment, the bypass protection circuit includes:
the input end of the rectifier bridge is electrically connected with the input end of the alternating current-direct current conversion circuit, the output end of the rectifier bridge is electrically connected with the output end of the alternating current-direct current conversion circuit, and the rectifier bridge is used for receiving the electric energy and outputting the second driving voltage after the electric energy is rectified.
In one embodiment, the bypass protection circuit further comprises:
the input end of the first switch unit is electrically connected with the input end of the alternating current-direct current conversion circuit, and the output end of the first switch unit is electrically connected with the input end of the rectifier bridge.
In one embodiment, the bypass protection circuit further comprises:
the input end of the second switch unit is electrically connected with the output end of the rectifier bridge, and the input end of each driving circuit and the output end of each alternating current-direct current conversion circuit are electrically connected with the output end of the second switch unit;
when the first driving voltage is smaller than the peak value of the second driving voltage and the second switching unit receives a preset dimming command, the second switching unit is in a disconnected state within a preset time.
In one embodiment, the ac power source comprises a single-phase ac line and a single-phase ac neutral;
the bypass protection circuit comprises a first input end and a second input end, wherein the first input end is electrically connected with the single-phase alternating current live wire, and the second input end is electrically coupled with the single-phase alternating current zero wire.
In one embodiment, the ac power source includes a first phase line, a second phase line, and a third phase line;
the bypass protection circuit comprises a first input end and a second input end, the first input end is electrically connected with the first phase line, and the second input end is electrically connected with the second phase line or the third phase line; or
The first input end is electrically connected with the second phase line, and the second input end is electrically connected with the third phase line.
In one embodiment, the ac power source includes a first phase line, a second phase line, and a third phase line;
the bypass protection circuit comprises a first input end, a second input end and a third input end, wherein the first input end is electrically connected with the first phase line, the second input end is electrically connected with the second phase line, and the third input end is electrically connected with the third phase line.
In one embodiment, the alternating current power source comprises a first phase line, a second phase line, a third phase line and a zero line;
the bypass protection circuit comprises a first input end and a second input end, the first input end is electrically connected with the first phase line, the second phase line or the third phase line, and the second input end is electrically connected with the zero line.
In one embodiment, the power supply circuit further includes:
and the input end of the one-way conduction circuit is electrically connected with the output end of the alternating current-direct current conversion circuit, and the output end of the bypass protection circuit and the input end of each driving circuit are electrically connected with the output end of the one-way conduction circuit.
In one embodiment, the driving circuit is an AC/DC conversion circuit or a DC/DC conversion circuit.
Compared with the prior art, above-mentioned supply circuit will bypass protection circuit connect in parallel in alternating current-direct current conversion circuit's both ends utilize alternating current-direct current conversion circuit bypass protection circuit and drive circuit's cooperation can be online in real time will the electric energy output that alternating current power supply provided extremely luminous load can guarantee simultaneously that alternating current-direct current conversion circuit and bypass protection circuit's switching process does not have the time delay, right luminous load's illumination does not have any influence, has improved supply circuit's reliability greatly, and this application still has with low costs, simple structure's advantage simultaneously.
Drawings
Fig. 1 is a circuit block diagram of a power supply circuit according to an embodiment of the present application;
fig. 2 is a first schematic diagram illustrating an input voltage waveform of a driving circuit according to an embodiment of the present disclosure;
fig. 3 is a schematic diagram illustrating an input voltage waveform of a driving circuit according to another embodiment of the present application;
fig. 4 is a first circuit schematic diagram of a power supply circuit according to an embodiment of the present application;
fig. 5 is a second circuit schematic diagram of a power supply circuit according to another embodiment of the present application;
fig. 6 is a third circuit schematic diagram of a power supply circuit according to another embodiment of the present application;
fig. 7 is a fourth schematic circuit diagram of a power supply circuit according to another embodiment of the present application.
10 supply circuit
100 AC-DC conversion circuit
101 ac power supply
102 single-phase AC live line
103 single-phase AC zero line
104 first phase line
105 second phase line
106 third phase line
107 zero line
200 driving circuit
201 light emitting load
300 bypass protection circuit
310 first switch unit
320 rectifier bridge
330 second switch unit
340 unidirectional conducting circuit
341 diode
Detailed Description
In order to make the aforementioned objects, features and advantages of the present application more comprehensible, embodiments accompanying the present application are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. This application is capable of embodiments in many different forms than those described herein and those skilled in the art will be able to make similar modifications without departing from the spirit of the application and it is therefore not intended to be limited to the embodiments disclosed below.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Referring to fig. 1, an embodiment of the present disclosure provides a power supply circuit 10, which can be applied to lighting systems, such as tunnel lighting, subway lighting, and lighting for important city road sections. The power supply circuit 10 includes: the ac-dc conversion circuit 100, at least one driving circuit 200 and a bypass protection circuit 300. When in use, the input end of the ac/dc conversion circuit 100 is electrically connected to the ac power supply 101. The ac-dc conversion circuit 100 is configured to receive electric energy output by an ac power source 101, and convert the electric energy into a first driving voltage. The bypass protection circuit 300 is connected in parallel to two ends of the ac-dc conversion circuit 100. The bypass protection circuit 300 is configured to receive the electric energy and convert the electric energy into a second driving voltage.
The input end of each driving circuit 200 is electrically connected to the output end of the ac-dc converting circuit 100. The output end of each driving circuit 200 is electrically connected to a light emitting load 201. The driving circuit 200 is configured to receive the first driving voltage or the second driving voltage, and operate according to the first driving voltage or the second driving voltage. Specifically, the driving circuit 200 receives the first driving voltage and outputs a corresponding driving signal to drive the light emitting load 201 to operate, or the driving circuit 200 receives the second driving voltage and outputs a corresponding driving signal to drive the light emitting load 201 to operate.
It is understood that the specific circuit structure of the ac-dc conversion circuit 100 is not limited as long as the function of converting the electric energy into the first driving voltage is provided. The specific circuit structure of the ac-dc conversion circuit 100 can be selected according to actual requirements. In one embodiment, the ac to dc conversion circuit 100 may be formed by a bridge rectifier, and in one embodiment, the ac to dc conversion circuit 100 may be formed by a half-wave rectifier or a full-wave rectifier. The ac-dc conversion circuit 100 converts the electric energy output by the ac power source 101 into a first driving voltage, such as a dc voltage, to drive each of the driving circuits 200 to operate.
It is understood that the specific circuit structure of the bypass protection circuit 300 is not limited as long as it has the function of receiving the electric energy and converting the electric energy into the second driving voltage (e.g., a direct current voltage). The specific circuit structure of the bypass protection circuit 300 can be selected according to actual requirements. In one embodiment, the bypass protection circuit 300 may be formed from a three-phase rectifier with a null switch. In one embodiment, the bypass protection circuit 300 may also be formed from a single phase rectifier mating contactor. When the ac-dc conversion circuit 100 fails, the bypass protection circuit 300 converts the electric energy into a second driving voltage in real time, so as to ensure that each driving circuit 200 can receive the second driving voltage without delay and normally operate according to the second driving voltage. The reliability of the power supply circuit 10 is further improved, no time delay is caused in the switching process between the ac-dc conversion circuit 100 and the bypass protection circuit 300, no influence is caused on the illumination of the light-emitting load 201, and the power supply circuit has the advantages of simple structure and low cost.
It is to be understood that the specific structure of the driving circuit 200 is not limited as long as it has a function of receiving and operating according to the first driving voltage or the second driving voltage. The specific structure of the driving circuit 200 can be selected according to actual requirements. In one embodiment, the driving circuit 200 may be a conventional AC/DC conversion circuit or a DC/DC conversion circuit. In one embodiment, the driving circuit 200 may also be a driver compatible with ac/dc power. The driving circuit 200 is used for receiving the first driving voltage or the second driving voltage, and driving the light emitting load 201 to operate according to the first driving voltage or the second driving voltage.
In one embodiment, at least one light emitting load 201 may be electrically connected to an output terminal of each of the driving circuits 200. That is, one of the driving circuits 200 may simultaneously drive at least one of the light emitting loads 201 to operate. In one embodiment, the number of the light emitting loads 201 driven by each of the driving circuits 200 may be set according to actual requirements. The number of the light emitting loads 201 driven by each of the driving circuits 200 may be one or more.
In one embodiment, the first driving voltage output by the ac-dc conversion circuit 100 may be replaced by outputting a first driving current or other driving signals, as long as the driving circuit 200 transmits the electric energy to the driving circuit 200 and the driving circuit 200 drives the light emitting load 201 to operate. Similarly, the second driving voltage output by the bypass protection circuit 300 may be replaced by a second driving current or another driving signal. In one embodiment, the lighting load 201 may be constituted by at least one LED lamp. The lighting load 201 may also be other lighting fixtures.
In one embodiment, the driving circuit 200 receives and operates according to the first driving voltage or the second driving voltage by: when the ac-dc conversion circuit 100 normally operates, if the first driving voltage is greater than or equal to the peak value of the second driving voltage, each driving circuit 200 receives the first driving voltage, and drives the light emitting load 201 to operate according to the first driving voltage (as shown in fig. 2). If the first driving voltage is smaller than the peak value of the second driving voltage, each of the driving circuits 200 may alternately receive the first driving voltage and the second driving voltage and alternately drive the light emitting load 201 to operate according to the first driving voltage and the second driving voltage (as shown in fig. 3).
In one embodiment, when the ac-dc conversion circuit 100 fails, the first driving voltage rapidly drops to approximately 0V. That is, the first driving voltage is smaller than the second driving voltage at this time. In this case, each of the driving circuits 200 only receives the second driving voltage, and drives the light emitting load 201 to operate according to the second driving voltage (as shown in fig. 2 and 3). That is, the bypass protection circuit 300 can output the electric energy provided by the ac power source to the lighting load on line and in real time. Meanwhile, the process of switching from the alternating current-direct current conversion circuit 100 to the bypass protection circuit 300 can be ensured to have no time delay, so that the lighting of the luminous load 201 is not influenced, and the reliability of the power supply circuit is greatly improved.
In one embodiment, after the ac-dc conversion circuit 100 recovers from a fault to a normal operation, if the first driving voltage is greater than or equal to the peak value of the second driving voltage after the fault is recovered, each of the driving circuits 200 receives the first driving voltage and drives the light emitting load 201 to operate according to the first driving voltage (as shown in fig. 2). Similarly, if the first driving voltage is smaller than the peak value of the second driving voltage after the failure is recovered, each driving circuit 200 alternately receives the first driving voltage and the second driving voltage, and alternately drives the light emitting load 201 to operate according to the first driving voltage and the second driving voltage (as shown in fig. 3).
That is, the bypass protection circuit 300 is always in operation, i.e., the bypass protection circuit 300 is always in an online state, regardless of whether the ac-dc conversion circuit 100 fails. When the operating states of the ac/dc conversion circuit 100 are sequentially switched from normal, failed, and recovered from failure, the driving voltage of the driving circuit 200 is always present. That is, the light-emitting load 201 is always working, and there is no interruption therebetween, so that no time delay is caused in the switching process between the ac-dc conversion circuit 100 and the bypass protection circuit 300, and thus, no influence is caused on the illumination of the light-emitting load 201, and the reliability of the power supply circuit 10 is greatly improved.
In this embodiment, the bypass protection circuit 300 is connected in parallel to the two ends of the ac-dc conversion circuit 100, and the ac-dc conversion circuit 100, the bypass protection circuit 300 and the driving circuit 200 are used in cooperation, so that the electric energy provided by the ac power source 101 can be output to the light-emitting load 201 on line in real time, and meanwhile, no time delay in the switching process between the ac-dc conversion circuit 100 and the bypass protection circuit 300 can be ensured, no influence is caused on the illumination of the light-emitting load 201, and the reliability of the power supply circuit 10 is greatly improved.
Referring to fig. 4, in one embodiment, the bypass protection circuit 300 includes: a rectifier bridge 320. The input end of the rectifier bridge 320 is electrically connected to the input end of the ac-dc conversion circuit 100. The output end of the rectifier bridge 320 is electrically connected to the output end of the ac-dc conversion circuit 100 and the input end of each of the driving circuits 200. The rectifier bridge 320 is configured to receive the electric energy, rectify the electric energy, and output the second driving voltage.
The rectifier bridge 320 is utilized to rectify the electric energy output by the ac power supply 101, and then output the second driving voltage, where the rectified second driving voltage is a forward voltage, so that the driving circuit 200 and the ac-dc conversion circuit 100 can both work normally. Meanwhile, when the ac-dc conversion circuit 100 fails, the second driving voltage output by the rectifier bridge 320 may be used to drive each driving circuit 200, so that the light-emitting load 201 operates normally.
In one embodiment, the bypass protection circuit 300 further comprises: a first switching unit 310. The input terminal of the first switch unit 310 is electrically connected to the input terminal of the ac-dc conversion circuit 100. The output terminal of the first switch unit 310 is electrically connected to the input terminal of the rectifier bridge 320.
In one embodiment, the first switching unit 310 may be an air switch. In one embodiment, the first switching unit 310 may also be a contactor. The first switch unit 310 can control the operation or non-operation of the bypass protection circuit 300; on the other hand, when each of the driving circuits 200 or the light emitting loads 201 fails, a protection operation is automatically performed, so that the bypass protection circuit 300 stops operating, thereby improving the reliability of the power supply circuit 10.
In one embodiment, the bypass protection circuit 300 further comprises: a second switching unit 330. The input terminal of the second switch unit 330 is electrically connected to the output terminal of the rectifier bridge 320. The input terminal of each of the driving circuits 200 and the output terminal of the ac-dc conversion circuit 100 are electrically connected to the output terminal of the second switch unit 330. When the first driving voltage is less than the peak value of the second driving voltage and the second switching unit 330 receives a preset dimming command, the second switching unit 330 is in an off state within a preset time, and after the preset time, the second switching unit 330 is turned on again.
In one embodiment, the second switching unit 330 may be a contactor. In one embodiment, the second switch unit 330 may also be an electronic switch, such as an IGBT (Insulated Gate Bipolar Transistor), a MOSFET (Metal-Oxide-Semiconductor Field Effect Transistor), and the like. In one embodiment, the preset dimming command may come from a controller (not shown), and in one embodiment, the preset dimming command may be a manual operation. The source of the preset dimming command is not limited herein. In an embodiment, the specific time of the preset time may be selected according to actual requirements, which is also not an example. In one embodiment, if the first driving voltage is always greater than or equal to the peak value of the second driving voltage, the second switching unit 330 may be omitted, thereby further saving cost.
In one embodiment, the output voltage of the bypass protection circuit 300 (i.e., the second driving voltage) is cut off within the preset time by switching on and off the second switching unit 330, so as to facilitate normal transmission of a control command of a controller (not shown). Specifically, when dimming is required, the controller controls the second switching unit 330 to be turned off to perform dimming operation, so as to eliminate the influence of the second driving voltage output after the bypass protection circuit 300 rectifies the input voltage of the driving circuit 200, thereby avoiding the influence on the dimming function; when dimming is not required, the controller controls the second switching unit 330 to be closed.
In one embodiment, the ac power source 101 includes a single-phase ac live line 102 and a single-phase ac neutral line 103. The bypass protection circuit 300 includes a first input terminal and a second input terminal. The first input terminal is electrically connected to the single-phase ac live line 102. The second input end is electrically connected with the single-phase alternating current zero line 103. In one embodiment, if the ac-dc converter circuit 100 fails, the bypass protection circuit 300 may transmit the electric energy output by the ac power source 101 to each of the driving circuits 200, so that the light-emitting load 201 operates normally, thereby improving the reliability of the power supply circuit 10.
Referring to fig. 5, in one embodiment, the ac power source 101 includes a first phase line 104, a second phase line 105, and a third phase line 106. The bypass protection circuit 300 includes a first input terminal and a second input terminal. The first input end is electrically connected to the first phase line 104, and the second input end is electrically connected to the second phase line 105 or the third phase line 106. Or, the first input end is electrically connected to the second phase line 105; the second input end is electrically connected to the third phase line 106. In one embodiment, the first input terminal and the second input terminal may be electrically connected to any two of the three phase lines of the ac power source 101.
Referring to fig. 6, in one embodiment, the ac power source 101 includes a first phase line 104, a second phase line 105, and a third phase line 106. The bypass protection circuit 300 includes a first input terminal, a second input terminal, and a third input terminal. The first input terminal is electrically connected to the first phase line 104. The second input terminal is electrically connected to the second phase line 105. The third input end is electrically connected to the third phase line 106. In one embodiment, with the connection manner of this embodiment, the second driving voltage output by the bypass protection circuit 300 is three times that of the single-phase driving, and it needs to be noticed during design whether the input voltage of the driving circuit 200 meets the requirement.
In one embodiment, the first input terminal may also be electrically connected to the second phase line 105; the second input terminal is electrically connected to the third phase line 106; the third input terminal is electrically connected to the first phase line 104. In one embodiment, the first input terminal may also be electrically connected to the third phase line 106; the second input terminal is electrically connected to the first phase line 104; the third input terminal is electrically connected to the second phase line 105. In one embodiment, the connection manner between the first phase line 104, the second phase line 105, and the third phase line 106 and the first input end, the second input end, and the third input end may be selected according to actual requirements.
Referring to fig. 7, in one embodiment, the ac power source 101 includes a first phase line 104, a second phase line 105, a third phase line 106, and a neutral line 107. The bypass protection circuit 300 includes a first input terminal and a second input terminal. The first input end is electrically connected to the first phase line 104, the second phase line 105, or the third phase line 106. The second input end is electrically connected to the neutral line 107. In one embodiment, if the power distribution margin is sufficient, the first input end may be electrically connected to any phase line of the ac power source 101, and the second input end is electrically connected to the neutral line 107.
In one embodiment, the power supply circuit 10 further includes: a unidirectional conducting circuit 340. The input end of the unidirectional circuit 340 is electrically connected to the output end of the ac/dc conversion circuit 100. The output terminal of the unidirectional circuit 340 is electrically connected to the output terminal of the bypass protection circuit 300. In one embodiment, the unidirectional conducting circuit 340 may be a diode 341, and the diode 341 is used to prevent the second driving voltage rectified by the bypass protection circuit 300 from flowing backward into the ac-dc conversion circuit 100, so as to protect the power supply circuit 10 from being damaged.
To sum up, this application will bypass protection circuit 300 connect in parallel in alternating current-direct current conversion circuit 100's both ends utilize alternating current-direct current conversion circuit 100 bypass protection circuit 300 and drive circuit 200's cooperation can be online real-time will the electric energy output that alternating current power supply 101 provided extremely luminous load 201, can guarantee simultaneously that the switching process between alternating current-direct current conversion circuit 100 and the bypass protection circuit 300 does not have the time delay, thereby it is right luminous load 201's illumination does not have any influence, has improved greatly supply circuit 10's reliability, this application still has simultaneously with low costs, simple structure's advantage.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (13)
1. A power supply circuit, comprising:
the alternating current-direct current conversion circuit (100) is used for receiving electric energy output by an alternating current power supply (101) and converting the electric energy into first driving voltage;
the bypass protection circuit (300) is connected in parallel to two ends of the alternating current-direct current conversion circuit (100) and used for receiving the electric energy and converting the electric energy into a second driving voltage; and
the input end of each driving circuit (200) is electrically connected with the output end of the alternating current-direct current conversion circuit (100), and the output end of each driving circuit (200) is electrically connected with a light-emitting load (201);
the driving circuit (200) is used for receiving the first driving voltage or the second driving voltage and working according to the first driving voltage or the second driving voltage.
2. The power supply circuit of claim 1, wherein each of said driver circuits (200) receives said first drive voltage when said first drive voltage is greater than or equal to a peak value of said second drive voltage; or
When the first driving voltage is smaller than the peak value of the second driving voltage, each of the driving circuits (200) alternately receives the first driving voltage and the second driving voltage.
3. The power supply circuit according to claim 1, wherein each of said driver circuits (200) receives said second driving voltage when said ac-dc converter circuit (100) fails.
4. The power supply circuit according to claim 3, wherein each of the driving circuits (200) receives the first driving voltage when the first driving voltage is greater than or equal to a peak value of the second driving voltage after the AC/DC conversion circuit (100) recovers from a fault to a normal operation; or
When the first driving voltage is smaller than the peak value of the second driving voltage, each of the driving circuits (200) alternately receives the first driving voltage and the second driving voltage.
5. The supply circuit of claim 1, wherein the bypass protection circuit (300) comprises:
the input end of the rectifier bridge (320) is electrically connected with the input end of the alternating current-direct current conversion circuit (100), the output end of the rectifier bridge (320) is electrically connected with the output end of the alternating current-direct current conversion circuit (100), and the rectifier bridge (320) is used for receiving the electric energy and outputting the second driving voltage after the electric energy is rectified.
6. The supply circuit of claim 5, wherein the bypass protection circuit (300) further comprises:
the input end of the first switch unit (310) is electrically connected with the input end of the alternating current-direct current conversion circuit (100), and the output end of the first switch unit (310) is electrically connected with the input end of the rectifier bridge (320).
7. The supply circuit of claim 6, wherein the bypass protection circuit (300) further comprises:
the input end of the second switch unit (330) is electrically connected with the output end of the rectifier bridge (320), and the input end of each driving circuit (200) and the output end of the alternating current-direct current conversion circuit (100) are electrically connected with the output end of the second switch unit (330);
when the first driving voltage is less than the peak value of the second driving voltage and the second switching unit (330) receives a preset dimming command, the second switching unit (330) is in an off state within a preset time.
8. The supply circuit according to claim 1, characterized in that said alternating current source (101) comprises a single-phase alternating current live line (102) and a single-phase alternating current neutral line (103);
the bypass protection circuit (300) comprises a first input end and a second input end, wherein the first input end is electrically connected with the single-phase alternating current live wire (102), and the second input end is electrically connected with the single-phase alternating current zero wire (103).
9. The supply circuit according to claim 1, characterized in that said alternating current source (101) comprises a first phase line (104), a second phase line (105) and a third phase line (106);
the bypass protection circuit (300) comprises a first input electrically connected to the first phase line (104) and a second input electrically connected to the second phase line (105) or the third phase line (106); or
The first input end is electrically connected with the second phase line (105), and the second input end is electrically connected with the third phase line (106).
10. The supply circuit according to claim 1, characterized in that said alternating current source (101) comprises a first phase line (104), a second phase line (105) and a third phase line (106);
the bypass protection circuit (300) comprises a first input end, a second input end and a third input end, wherein the first input end is electrically connected with the first phase line (104), the second input end is electrically connected with the second phase line (105), and the third input end is electrically connected with the third phase line (106).
11. The power supply circuit according to claim 1, characterized in that said alternating current source (101) comprises a first phase line (104), a second phase line (105), a third phase line (106) and a neutral line (107);
the bypass protection circuit (300) comprises a first input end and a second input end, the first input end is electrically connected with the first phase line (104), the second phase line (105) or the third phase line (106), and the second input end is electrically connected with the zero line (107).
12. The power supply circuit of claim 1, further comprising:
the input end of the unidirectional conduction circuit (340) is electrically connected with the output end of the alternating current-direct current conversion circuit (100), and the output end of the bypass protection circuit (300) and the input ends of the driving circuits (200) are electrically connected with the output end of the unidirectional conduction circuit (340).
13. Supply circuit according to any of claims 1-12, characterized in that the driver circuit (200) is an AC/DC converter circuit or a DC/DC converter circuit.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113316284A (en) * | 2021-04-14 | 2021-08-27 | 厦门普为光电科技有限公司 | LED lamp with residual light preventing function |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5532638A (en) * | 1992-09-21 | 1996-07-02 | Hitachi, Ltd. | Superconducting energy storage apparatus |
| US5815387A (en) * | 1995-12-13 | 1998-09-29 | Mitsubishi Denki Kabushiki Kaisha | Transformer protective apparatus having semiconductor and mechanical bypass means |
| CN2904558Y (en) * | 2006-03-16 | 2007-05-23 | 重庆巴城机电有限公司 | Intelligent control electricity saver |
| CN101754536A (en) * | 2010-01-27 | 2010-06-23 | 深圳市世纪新泰达电子有限公司 | Power-supply system and power-supply method for providing power for illuminating system |
| CN102710009A (en) * | 2012-05-15 | 2012-10-03 | 浪潮电子信息产业股份有限公司 | Design method for supplying power to core data center |
| CN103096561A (en) * | 2011-10-31 | 2013-05-08 | 英飞特电子（杭州）股份有限公司 | Constant current driver of light emitting diode (LED) light source |
| CN103095099A (en) * | 2011-10-31 | 2013-05-08 | 英飞特电子（杭州）股份有限公司 | Load drive circuit |
| CN103139992A (en) * | 2013-02-26 | 2013-06-05 | 上海大学 | Light-emitting diode (LED) dimming driving system with silicon controlled bypass dimming circuit |
| CN103441569A (en) * | 2013-09-10 | 2013-12-11 | 国家电网公司 | Device and method for monitoring electrical network voltage instant jittering |
| CN203707824U (en) * | 2013-12-31 | 2014-07-09 | 东莞市澳星通信设备有限公司 | Integrated UPS |
| CN104578389A (en) * | 2015-01-08 | 2015-04-29 | 华为技术有限公司 | Electric control method, device and system |
| CN204598398U (en) * | 2015-04-29 | 2015-08-26 | 宁波奥克斯高科技有限公司 | Road lamp energy-saving system |
-
2019
- 2019-07-02 CN CN201910588246.8A patent/CN110944430B/en active Active
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5532638A (en) * | 1992-09-21 | 1996-07-02 | Hitachi, Ltd. | Superconducting energy storage apparatus |
| US5815387A (en) * | 1995-12-13 | 1998-09-29 | Mitsubishi Denki Kabushiki Kaisha | Transformer protective apparatus having semiconductor and mechanical bypass means |
| CN2904558Y (en) * | 2006-03-16 | 2007-05-23 | 重庆巴城机电有限公司 | Intelligent control electricity saver |
| CN101754536A (en) * | 2010-01-27 | 2010-06-23 | 深圳市世纪新泰达电子有限公司 | Power-supply system and power-supply method for providing power for illuminating system |
| CN103096561A (en) * | 2011-10-31 | 2013-05-08 | 英飞特电子（杭州）股份有限公司 | Constant current driver of light emitting diode (LED) light source |
| CN103095099A (en) * | 2011-10-31 | 2013-05-08 | 英飞特电子（杭州）股份有限公司 | Load drive circuit |
| CN102710009A (en) * | 2012-05-15 | 2012-10-03 | 浪潮电子信息产业股份有限公司 | Design method for supplying power to core data center |
| CN103139992A (en) * | 2013-02-26 | 2013-06-05 | 上海大学 | Light-emitting diode (LED) dimming driving system with silicon controlled bypass dimming circuit |
| CN103441569A (en) * | 2013-09-10 | 2013-12-11 | 国家电网公司 | Device and method for monitoring electrical network voltage instant jittering |
| CN203707824U (en) * | 2013-12-31 | 2014-07-09 | 东莞市澳星通信设备有限公司 | Integrated UPS |
| CN104578389A (en) * | 2015-01-08 | 2015-04-29 | 华为技术有限公司 | Electric control method, device and system |
| CN204598398U (en) * | 2015-04-29 | 2015-08-26 | 宁波奥克斯高科技有限公司 | Road lamp energy-saving system |
Non-Patent Citations (1)
| Title |
|---|
| 张文平: "不间断电源系统可靠性若干关键问题研究", 《中国博士学位论文全文数据库 信息科技辑》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113316284A (en) * | 2021-04-14 | 2021-08-27 | 厦门普为光电科技有限公司 | LED lamp with residual light preventing function |
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