CN112970334A - Power supply for a lamp - Google Patents
Power supply for a lamp Download PDFInfo
- Publication number
- CN112970334A CN112970334A CN201880099175.9A CN201880099175A CN112970334A CN 112970334 A CN112970334 A CN 112970334A CN 201880099175 A CN201880099175 A CN 201880099175A CN 112970334 A CN112970334 A CN 112970334A
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- Prior art keywords
- power supply
- controller
- signal
- adjustment signal
- processed
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/30—Driver circuits
- H05B45/37—Converter circuits
- H05B45/3725—Switched mode power supply [SMPS]
- H05B45/382—Switched mode power supply [SMPS] with galvanic isolation between input and output
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/30—Driver circuits
- H05B45/32—Pulse-control circuits
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/30—Driver circuits
- H05B45/37—Converter circuits
- H05B45/3725—Switched mode power supply [SMPS]
- H05B45/39—Circuits containing inverter bridges
Landscapes
- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
The invention provides a power supply for a lamp. The adjustment signal is detected and processed by a first controller (101) located on the primary side, and the processed adjustment signal is transmitted via an isolator (103) to a second controller (102) located on the secondary side. Therefore, the quality of the adjustment signal is ensured in transmission, and the output state of the power supply can be accurately adjusted by the second controller (102) located on the secondary side. Furthermore, no additional circuitry for converting and encoding or decoding the signal is required.
Description
Technical Field
Embodiments of the present disclosure relate generally to the field of electrical devices, and more particularly to power supplies for lamps.
Background
Aspects described in this section can facilitate a better understanding of the disclosure. Accordingly, the statements in this section are to be read in this light and are not to be construed as admissions of prior art or not.
Today, power supplies for lamps are becoming more and more intelligent and secure. For example, the power supply isolates the input side (primary side) and the output side (secondary side), and is therefore safer for the user to use. In addition, some power supplies have a dimming function so that a user can change the output state of the power supply according to various applications.
In the existing isolated type power supply, an electrical signal can be transmitted between the primary side and the secondary side by using the coupling characteristic of the isolation member.
In order to change the output state of the power supply, there are two existing solutions. The first solution is as follows: the feedback signal is detected by a detection circuit located on the secondary side and transmitted to a control circuit located on the primary side via an isolator. The control circuit adjusts the operating state according to the feedback signal until the output state of the power supply matches the state of the input adjustment signal.
The second solution is as follows: the feedback signal on the secondary side is encoded by a modulator and transmitted to the control circuit on the primary side with a preferably electrically isolated signal converter. The signal is then decoded by a demodulator and transmitted to a control circuit via a filter or frequency discriminator. The control circuit then outputs a regulation signal to the main circuit in accordance with the feedback signal. By detecting the operating state of the secondary side and coupling a feedback signal to the primary side, the main control circuit then adjusts the operating state in accordance with the feedback signal so that the operating state of the power supply is satisfactory.
Disclosure of Invention
The inventors of the present disclosure found that in the above prior art solution, the operating state of the power supply is regulated on the primary side. Therefore, the control of the output state of the power supply is not very accurate.
Generally, embodiments of the present disclosure provide a power supply for a lamp. In an embodiment, the adjustment signal is detected and processed by a first controller located on the primary side, and the processed adjustment signal is transmitted via an isolator to a second controller located on the secondary side. Therefore, the quality of the adjustment signal is ensured in transmission, and the output state of the power supply can be accurately adjusted by the second controller located on the secondary side. Furthermore, no additional circuitry for converting and encoding or decoding the signal is required.
In a first aspect, there is provided a power supply for a lamp, the power supply comprising: a first controller located on a primary side of the power supply; a second controller on a secondary side of the power supply; and an isolator between the primary side and the secondary side, the first controller detecting and processing the adjustment signal and transmitting the processed adjustment signal to the second controller via the isolator.
In one embodiment, the second controller adjusts the output state of the power supply in accordance with the adjustment signal.
In one embodiment, the first controller converts and encodes the adjustment signal to obtain a processed adjustment signal, and the second controller decodes and converts the processed adjustment signal to obtain the adjustment signal.
In one embodiment, the isolator includes an optical coupler.
In one embodiment, the input voltage and the output voltage of the optocoupler are square waves having the same frequency and different duty cycles.
In one embodiment, the isolator includes a capacitor.
In one embodiment, the input voltage and the output voltage of the capacitor are square waves with different frequencies and the same duty cycle.
In one embodiment, the first controller comprises a first MCU (microcontroller unit).
In one embodiment, the second controller includes a second MCU.
In one embodiment, the adjustment signal is a variable signal, a digital signal such as a DALI (digital addressable lighting interface) signal, or an analog signal such as a 0V to 10V signal.
In one embodiment, the lamp is an LED lamp.
According to various embodiments of the present disclosure, the adjustment signal is detected and processed by a first controller located on the primary side, and the processed adjustment signal is transmitted to a second controller located on the secondary side via an isolator. Therefore, the quality of the adjustment signal is ensured in transmission, and the output state of the power supply can be accurately adjusted by the second controller located on the secondary side. Furthermore, no additional circuitry for converting and encoding or decoding the signal is required.
Drawings
The above and other aspects, features and benefits of various embodiments of the present disclosure will become more apparent by way of example from the following detailed description with reference to the accompanying drawings, wherein like reference numerals or letters are used to designate like or equivalent elements. The drawings are shown to facilitate a better understanding of embodiments of the disclosure and are not necessarily drawn to scale, wherein:
fig. 1 is a diagram of a power supply for a lamp according to an embodiment of the present disclosure;
fig. 2 is another illustration of a power supply for a lamp according to an embodiment of the present disclosure;
FIG. 3 is a graphical representation of the voltage of the processed conditioning signal prior to input into and output from the optocoupler according to an embodiment of the disclosure;
FIG. 4 is another illustration of a power supply for a lamp according to an embodiment of the present disclosure;
FIG. 5 is a graphical representation of the voltage of the processed conditioned signal prior to input into and output from the capacitor according to an embodiment of the present disclosure;
fig. 6 is another illustration of a power supply for a lamp according to an embodiment of the present disclosure.
Detailed Description
The present disclosure will now be discussed with reference to several exemplary embodiments. It should be understood that these embodiments are discussed only to enable those skilled in the art to better understand the disclosure and to practice the disclosure accordingly, and are not intended to suggest any limitation as to the scope of the disclosure.
As used herein, the terms "first" and "second" refer to different elements. The singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. As used herein, the terms "comprising," "including," "having," and/or "containing" specify the presence of stated features, elements, and/or components, etc., but do not preclude the presence or addition of one or more other features, elements, components, and/or groups thereof. The term "based on" is to be understood as "based at least in part on". The terms "one embodiment" and "an embodiment" are to be understood as "at least one embodiment". The term "another embodiment" is to be understood as "at least one other embodiment". Other explicit and implicit definitions may be included below.
First embodiment
In a first embodiment, a power supply for a lamp is provided.
Fig. 1 is an illustration of a power supply for a lamp according to an embodiment of the present disclosure. As shown in fig. 1, the power supply 100 includes:
a first controller 101 located on the primary side of the power supply;
a second controller 102 located on the secondary side of the power supply; and
an isolator 103 between the primary side and the secondary side,
the first controller 101 detects and processes the adjustment signal, and transmits the processed adjustment signal to the second controller 102 via the isolator 103.
In one embodiment, power supply 100 may be any type of dimmable power supply. For example, the power supply 100 may utilize PWM (pulse width modulation) or amplitude modulation or a combination of PWM and amplitude modulation for dimming.
In one embodiment, the power supply 100 may also include a rectifier 104 and a flyback circuit 105.
As shown in fig. 1, the rectifier 104 may be a Bridge Rectifier (BR) that includes a diode D1.
As shown in fig. 1, the flyback circuit 105 may include a switch S1, a transformer T, capacitors C1 and C2, and a diode D2.
In one embodiment, other configurations and functions of the rectifier 104 and the flyback circuit 105 may be similar to those in the related art, and further details of these components will not be described further herein.
In one embodiment, the lamp 10 may be any type of lamp. For example, the lamp 10 is an LED lamp.
In one embodiment, the first controller 101 and the second controller 102 may be any type of controller.
For example, the first controller 101 includes a first MCU (microcontroller unit), and the second controller 102 includes a second MCU.
In one embodiment, the adjustment signal is detected by a first controller 101 located on the primary side.
The adjustment signal may be various types of signals. For example, the adjustment signal is a variable signal, a digital signal such as a DALI (digital addressable lighting interface) signal, or an analog signal such as a 0V to 10V signal. The conditioning signal may also be sent over the AC power line of the power supply 100.
When the adjustment signal is a variable signal, the voltage of the variable signal may vary in a range of 0V to 10V.
When the first controller 101 detects the adjustment signal, the first controller 101 may convert and encode the adjustment signal to obtain a processed adjustment signal. The processed adjustment signal is then transmitted to the second controller 102 via the isolator 103.
Upon receiving the processed adjustment signal, the second controller may decode and convert the processed adjustment signal to obtain the adjustment signal.
Thus, the conditioning signal can be transmitted from the primary side to the secondary side with good quality and without any additional circuitry for converting and encoding or decoding the signal.
When the processed adjustment signal is decoded and converted, the adjustment signal is collected by the second controller 102, and the second controller 102 may adjust the output state of the power supply according to the adjustment signal.
The second controller 102 may use existing methods to adjust the output state of the power supply.
As can be seen from the above embodiments, the adjustment signal is detected and processed by a first controller located on the primary side, and the processed adjustment signal is transmitted via an isolator to a second controller located on the secondary side. Therefore, the quality of the adjustment signal is ensured in transmission, and the output state of the power supply can be accurately adjusted by the second controller located on the secondary side. Furthermore, no additional circuitry for converting and encoding or decoding the signal is required.
Second embodiment
In a second embodiment, a power supply for a lamp is provided.
Fig. 2 is another illustration of a power supply for a lamp according to an embodiment of the present disclosure.
As shown in fig. 2, the power supply 200 includes:
a first MCU 201 on the primary side of the power supply;
a second MCU 202 located on the secondary side of the power supply; and
an optocoupler 203 located between the primary side and the secondary side,
the first MCU 201 detects and processes the adjustment signal, and transmits the processed adjustment signal to the second MCU 202 via the optical coupler 203.
In one embodiment, the optical coupler 203 acts as an isolator.
The functions of the first MCU 201, the second MCU 202, and the optocoupler 203 may be similar to the functions of the first controller 101, the second controller 102, and the isolator 103 in the first embodiment, and will not be further described herein.
In one embodiment, the construction and function of the other components of the power supply 200 may be similar to those in the related art and will not be described further herein.
As shown in fig. 2, the adjustment signal is input and detected by the first MCU 201, and the processed adjustment signal is output by the first MCU 201. Vp1 is the voltage of the conditioned signal processed and input into optocoupler 203. Vs1 is the voltage of the processed adjustment signal output from optocoupler 203.
Fig. 3 is a graphical representation of the voltage of the processed conditioning signal prior to input into and output from the optocoupler according to an embodiment of the disclosure.
As shown in fig. 3, Vp1 and Vs1 are square waves with the same frequency and different duty cycles.
For example, the duty cycle of Vp1 may be in the range of 1% to 100%.
As can be seen from the above embodiments, the adjustment signal is detected and processed by a first controller located on the primary side, and the processed adjustment signal is transmitted via an isolator to a second controller located on the secondary side. Therefore, the quality of the adjustment signal is ensured in transmission, and the output state of the power supply can be accurately adjusted by the second controller located on the secondary side. Furthermore, no additional circuitry for converting and encoding or decoding the signal is required.
Third embodiment
In a third embodiment, a power supply for a lamp is provided.
Fig. 4 is another illustration of a power supply for a lamp according to an embodiment of the present disclosure.
As shown in fig. 4, the power supply 300 includes:
a first MCU 301 located on the primary side of the power supply;
a second MCU 302 located on the secondary side of the power supply; and
a capacitor 303 between the primary side and the secondary side,
the first MCU 301 detects and processes the adjustment signal and transmits the processed adjustment signal to the second MCU 302 via the capacitor 303.
In one embodiment, capacitor 303 acts as an isolator.
The functions of first MCU 301, second MCU 302, and capacitor 303 may be similar to the functions of first controller 101, second controller 102, and isolator 103 in the first embodiment, and will not be further described herein.
In one embodiment, the construction and function of the other components of the power supply 300 may be similar to those in the related art and will not be described further herein.
As shown in fig. 4, the adjustment signal is input and detected by the first MCU 301, and the processed adjustment signal is output by the first MCU 301. Vp2 is the voltage of the conditioned signal processed and input into capacitor 303. Vs2 is the voltage of the processed regulation signal output from capacitor 303.
Fig. 5 is a graphical representation of the voltage of the processed conditioning signal prior to input into and output from the capacitor, according to an embodiment of the present disclosure.
As shown in fig. 5, Vp2 and Vs2 are square waves with different frequencies and the same duty cycle.
For example, the duty cycle of Vp2 and Vs2 may be 50%.
As can be seen from the above embodiments, the adjustment signal is detected and processed by a first controller located on the primary side, and the processed adjustment signal is transmitted via an isolator to a second controller located on the secondary side. Therefore, the quality of the adjustment signal is ensured in transmission, and the output state of the power supply can be accurately adjusted by the second controller located on the secondary side. Furthermore, no additional circuitry for converting and encoding or decoding the signal is required.
Fourth embodiment
In a fourth embodiment, a power supply for a lamp is provided.
Fig. 6 is another illustration of a power supply for a lamp according to an embodiment of the present disclosure.
As shown in fig. 6, the power supply 400 includes:
a first MCU 401 located on the primary side of the power supply;
a second MCU 402 located on the secondary side of the power supply; and
an optical coupler 403 between the primary side and the secondary side,
the first MCU 401 detects and processes the adjustment signal, and transmits the processed adjustment signal to the second MCU 402 via the optical coupler 403.
In one embodiment, the optical coupler 403 functions as an isolator.
The functions of the first MCU 401, the second MCU 402, and the optocoupler 403 may be similar to the functions of the first controller 101, the second controller 102, and the isolator 103 in the first embodiment, and will not be further described herein.
As shown in FIG. 6, a switching regulator (e.g., a half-bridge converter) is powered by a DC voltage VDCPower supply, wherein a high switch HS and a low switch LS are connected in the half bridge. The switches of the half bridge may be transistors, such as FETs or MOSFETs.
Starting from the midpoint between the half-bridge switches HS, LS, the LLC is connected in series with a capacitance Cr, followed by an inductance Lr (forming a resonant LC circuit) and a primary side inductance Lm of the transformer.
On the secondary side, the secondary side inductance Lt of the transformer is shown connected to diodes Dl and D2, providing a DC LED current I to the lighting device (in this case an LED)LED. LED Current ILEDVia a shunt resistor RsnsShunted to ground.
In one embodiment, the other configurations and functions of these components may be similar to those in the related art, and further details will not be described herein.
As can be seen from the above embodiments, the adjustment signal is detected and processed by a first controller located on the primary side, and the processed adjustment signal is transmitted via an isolator to a second controller located on the secondary side. Therefore, the quality of the adjustment signal is ensured in transmission, and the output state of the power supply can be accurately adjusted by the second controller located on the secondary side. Furthermore, no additional circuitry for converting and encoding or decoding the signal is required.
Generally, while operations are shown in a particular order, this should not be understood as requiring that such operations be performed in the particular order shown or in sequential order, or that all illustrated operations be performed, to achieve desirable results. In some cases, multitasking and parallel processing may be advantageous. Also, while several specific implementation details are included in the above discussion, these should not be construed as limitations on the scope of the disclosure, but rather as descriptions of features that may be specific to particular embodiments. Certain features that are described in the context of separate embodiments can also be implemented in combination in a single embodiment. Conversely, various features that are described in the context of a single embodiment can also be implemented in multiple embodiments separately or in any suitable subcombination.
Although the disclosure has been described in language specific to structural features and/or methodological acts, it is to be understood that the disclosure defined in the appended claims is not necessarily limited to the specific features or acts described above. Rather, the specific features and acts described above are disclosed as example forms of implementing the claims.
Claims (12)
1. A power supply for a lamp, comprising:
a first controller on a primary side of the power supply;
a second controller on a secondary side of the power supply; and
an isolator between the primary side and the secondary side,
the first controller detects and processes the adjustment signal and transmits the processed adjustment signal to the second controller via the isolator.
2. The power supply of claim 1,
the second controller adjusts an output state of the power supply according to the adjustment signal.
3. The power supply of claim 2,
the first controller converts and encodes the adjustment signal to obtain a processed adjustment signal,
the second controller decodes and converts the processed adjustment signal to obtain the adjustment signal.
4. The power supply of claim 1,
the isolator includes an optical coupler.
5. The power supply of claim 4,
the input voltage and the output voltage of the optocoupler are square waves with the same frequency and different duty cycles.
6. The power supply of claim 1,
the isolator includes a capacitor.
7. The power supply of claim 6,
the input voltage and the output voltage of the capacitor are square waves with different frequencies and the same duty cycle.
8. The power supply of any of claims 1-7,
the first controller includes a first MCU (micro controller unit).
9. The power supply of any of claims 1-8,
the second controller includes a second MCU.
10. The power supply of any of claims 1-9,
the adjustment signal is a variable signal, a digital signal or an analog signal.
11. The power supply of claim 10,
the digital signal is a DALI (digital addressable lighting interface) signal,
the analog signal is a 0V to 10V signal.
12. The power supply of any of claims 1-11,
the lamp is an LED lamp.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2018/112333 WO2020087199A1 (en) | 2018-10-29 | 2018-10-29 | Power supply for lamp |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112970334A true CN112970334A (en) | 2021-06-15 |
| CN112970334B CN112970334B (en) | 2023-09-29 |
Family
ID=70462301
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201880099175.9A Active CN112970334B (en) | 2018-10-29 | 2018-10-29 | Power supply for lamp |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP3900494B1 (en) |
| CN (1) | CN112970334B (en) |
| WO (1) | WO2020087199A1 (en) |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN112970334B (en) | 2023-09-29 |
| EP3900494A1 (en) | 2021-10-27 |
| WO2020087199A1 (en) | 2020-05-07 |
| EP3900494A4 (en) | 2022-05-18 |
| EP3900494B1 (en) | 2023-09-20 |
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