Driving power supply circuit

Abstract

The utility model discloses a driving power supply circuit, comprising a main control chip, a sampling module and a driving module, the sampling module is electrically connected with the main control chip, and the main control chip is electrically connected with the driving module; an electric energy metering database is stored in the main control chip, and the electric energy metering database comprises a plurality of input signals and a plurality of groups of first electric energy parameters in one-to-one correspondence with the input signals; the sampling module can sample a real-time input signal of the input end of the driving power supply circuit and feed back the real-time input signal to the main control chip, and the main control chip finds the corresponding first electric energy parameter from the electric energy metering database according to the real-time input signal. And the main control chip controls the output signal of the driving module at the same time.

Description

Technical Field

[0001] The utility model relates to the technical field of driving power supply, in particular to a driving power supply circuit. Background Art

[0002] The functions of LED driver power supplies currently on the market are relatively simple, and are generally only used to drive LED loads. If you want to monitor the current, voltage, power, active energy, and reactive energy of the input and output terminals, you need to connect an energy metering IC or set an energy metering module in the driver power supply. However, the energy metering IC is relatively expensive and large in size, making it difficult to apply to most driver power supplies. In addition, for isolated power supplies, a relatively complex isolation module is provided between the primary and secondary of the transformer, the main control chip is provided on the secondary side, and the dimming circuit of the rear stage is electrically connected to the main control chip. In the prior art, the energy metering module and the main control chip are both provided on the primary side, and the subsequent dimming circuit needs to add a lot of isolation devices, and the circuit structure is complex. Therefore, for the isolated driver power supply that has been maturely applied, if you want to collect the energy parameters of the input and output terminals in the driver power supply circuit, if the above-mentioned solutions are adopted, it is necessary to make major adjustments to the circuit of the existing driver power supply circuit, which is not convenient for modification, has a complex structure, and is costly. Utility Model Content

[0003] The purpose of the utility model is to solve at least one of the technical problems existing in the prior art, and to provide a driving power supply circuit which has a simple structure, low cost and is easy to be modified on the basis of the original driving power supply circuit to realize electric energy metering.

[0004] According to the driving power supply circuit of the embodiment of the utility model, it includes a main control chip, a sampling module and a driving module, the sampling module is electrically connected to the main control chip, and the main control chip is electrically connected to the driving module; the main control chip stores an electric energy metering database, and the electric energy metering database includes multiple input signals and multiple groups of first electric energy parameters corresponding to the input signals one by one; the sampling module can sample the real-time input signal of the input end of the driving power supply circuit and feed back the real-time input signal to the main control chip, the main control chip finds the corresponding first electric energy parameter from the electric energy metering database according to the real-time input signal, and the main control chip simultaneously controls the output signal of the driving module.

[0005] According to the driving power supply circuit of the embodiment of the utility model, the electric energy metering database includes multiple output signals and multiple groups of second electric energy parameters corresponding to the output signals one by one. The main control chip can sample the real-time output signal of the driving module, and the main control chip finds the corresponding second electric energy parameter from the electric energy metering database according to the real-time output signal.

[0006] According to the driving power supply circuit of the embodiment of the utility model, the first electric energy parameter and the second electric energy parameter respectively include input voltage, input current, power factor, active power, apparent power, reactive power, apparent energy, active energy, and reactive energy.

[0007] According to the driving power supply circuit of the embodiment of the utility model, it also includes a display module, and the display module is electrically connected to the main control chip to display the corresponding first power parameter and the second power parameter.

[0008] According to the driving power supply circuit of the embodiment of the utility model, the sampling module includes an analog signal sampling unit and an analog-to-digital conversion unit, the input end of the analog signal sampling unit is used to sample the input signal of the driving power supply circuit, the output end of the analog signal sampling unit is electrically connected to the input end of the analog-to-digital conversion unit, and the output end of the analog-to-digital conversion unit is electrically connected to the main control chip.

[0009] According to the driving power supply circuit of the embodiment of the utility model, it also includes an isolation module, one end of the isolation module is electrically connected to the sampling module, and the other end of the isolation module is electrically connected to the main control chip.

[0010] The driving power supply circuit according to the embodiment of the utility model further includes a rectifier module, the input end of the rectifier module is electrically connected to the mains, and the input end of the sampling module is electrically connected to the output end of the rectifier module.

[0011] According to the driving power supply circuit of the embodiment of the utility model, it also includes a step-down isolation module, the input end of the step-down isolation module is electrically connected to the output end of the rectifier module, and the output end of the step-down isolation module is electrically connected to the driving module.

[0012] The driving power supply circuit according to the embodiment of the utility model has at least the following beneficial effects: an electric energy metering database is established in advance outside the driving power supply, and the electric energy metering database can calculate the corresponding first electric energy parameter according to the input signal, and then the electric energy metering database is stored in the main control chip, and the main control chip obtains the corresponding first electric energy parameter from the electric energy metering database in combination with the real-time input signal obtained by sampling; for the existing mature driving power supply circuit, there is no need to make major adjustments to the existing driving power supply circuit, and the main control chip is still set on the secondary side. It is only necessary to set a sampling module on the basis of the existing driving power supply to sample the input signal, and then load the established electric energy metering database into the main control chip. The structure is simple and easy to modify, and the electric energy metering database can be applied to driving power supply circuits of various specifications, has good versatility, and saves costs.

[0013] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The specific implementation of the utility model is further described below in conjunction with the accompanying drawings;

[0015] Figure 1 It is the structural block diagram of the driving power supply circuit;

[0016] Figure 2 It is the schematic diagram of the driving power supply circuit. DETAILED DESCRIPTION

[0017] This section will describe in detail the specific embodiments of the utility model. The preferred embodiments of the utility model are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the utility model, but it cannot be understood as a limitation on the protection scope of the utility model.

[0018] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0019] In the description of the present utility model, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0020] Reference Figure 1 and Figure 2The utility model discloses a driving power supply circuit, comprising a rectifier module 40, a sampling module 10, an isolation module 30, a step-down isolation module 50, a main control chip U1 and a driving module 20. The input end of the sampling module 10 is electrically connected to the rectifier module 40 to sample the input signal, the output end of the sampling module 10 is electrically connected to one end of the isolation module 30, and the other end of the isolation module 30 is electrically connected to the main control chip U1. The input signal sampled by the sampling module 10 is transmitted to the main control chip U1 after isolation. The rectifier module 40 is electrically connected to the step-down isolation module 50, and the step-down isolation module 50 is electrically connected to the driving module 20. The main control chip U1 stores an electric energy metering database, which includes multiple input signals and multiple groups of first electric energy parameters corresponding to the input signals one by one. The sampling module 10 can sample the real-time input signal of the input end of the driving power supply circuit and feed the real-time input signal back to the main control chip U1. The main control chip U1 finds the corresponding first electric energy parameter from the electric energy metering database according to the real-time input signal, and the main control chip U1 controls the output signal of the driving module 20 at the same time.

[0021] In some embodiments, the electric energy metering database includes multiple output signals and multiple groups of second electric energy parameters corresponding to the output signals. The sampling end of the main control chip U1 is electrically connected to the output end of the driving module 20 to sample the real-time output signal of the driving module 20. The main control chip U1 finds the corresponding second electric energy parameter from the electric energy metering database according to the real-time output signal. The first electric energy parameter and the second electric energy parameter respectively include input voltage, input current, power factor, active power, apparent power, reactive power, apparent energy, active energy, and reactive energy.

[0022] The acquisition principle of the electric energy metering database is as follows: first, the data of all test points within the full working range of the existing driving power supply are obtained, and then a complete data model is established through these data (such as power factor, input voltage, input current and other parameters). It can also be called establishing a database containing the data of all test points within the full working range. The electric energy metering database can be stored in the host computer, and then downloaded to the existing main control chip U1 through the host computer.

[0023] In a general driving power supply circuit, the input signal is sampled by the sampling module, and the main control chip U1 obtains the corresponding first electric energy parameter in combination with the electric energy metering database. In some embodiments, when the driving power supply has a power factor correction function, since the PF value will have a sudden change in the low load range, it is impossible to filter out the parameter changes of the PF value mutation part by analyzing the input signal. Therefore, when the load is low, we use the corresponding relationship between the output signal and the input signal to establish an electric energy metering database to obtain the corresponding second electric energy parameter to avoid the PF value mutation problem. At this time, the main control chip U1 samples the output signal of the driving module 20 and obtains the corresponding second electric energy parameter in combination with the electric energy metering database.

[0024] The sampling module 10 includes an analog signal sampling module and an analog-to-digital conversion unit. The input end of the analog signal sampling module is used to sample the input signal of the driving power circuit. The output end of the analog signal sampling module is electrically connected to the input end of the analog-to-digital conversion unit. The output end of the analog-to-digital conversion unit is electrically connected to the main control chip U1. Figure 2 The analog signal sampling module uses an operational amplifier U2, and the analog-to-digital conversion unit uses a chip U3. The operational amplifier U2 samples the voltage signal, current signal and periodic signal output by the rectifier module 40, and then converts these signals into digital signals through the chip U3 to input into the main control chip U1.

[0025] The isolation module 30 may be an isolation device such as an optocoupler isolator, a transformer, a digital isolator, etc. The step-down isolation module 50 mainly uses a transformer to achieve step-down and isolation. The driving module 20 may be an existing LED driving circuit.

[0026] In some embodiments, a display module is further included. The display module is electrically connected to the main control chip U1 to display the corresponding first power parameter and second power parameter. The display module can sample an existing display device.

[0027] By establishing an electric energy metering database outside the driving power supply in advance, and then storing the electric energy metering database in the main control chip U1, the main control chip U1 combines the sampled input signal or output signal with the electric energy metering model to obtain the corresponding electric energy parameters; for the existing mature driving power supply circuit, there is no need to make major adjustments to the existing driving power supply circuit, the main control chip U1 is still set on the secondary side, and it is only necessary to set a sampling module 10 on the basis of the existing driving power supply to sample the input signal, and then load the established electric energy metering model into the main control chip U1. The structure is simple and easy to modify, and the electric energy metering model can be applied to driving power supply circuits of various specifications, has good versatility, and saves costs.

[0028] It is easy for those skilled in the art to understand that the above preferred embodiments can be freely combined and superimposed without conflict.

[0029] The above are only preferred embodiments of the present invention, and are not intended to limit the patent scope of the present invention. All equivalent structural changes made using the contents of the present invention specification and drawings under the utility model concept, or directly or indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A driving power supply circuit, characterized in that: include: A main control chip U1, a sampling module (10) and a driving module (20), wherein the sampling module (10) is electrically connected to the main control chip U1, and the main control chip U1 is electrically connected to the driving module (20); The main control chip U1 stores an electric energy metering database, which includes a plurality of input signals and a plurality of groups of first electric energy parameters corresponding to the input signals one by one; The sampling module (10) is capable of sampling a real-time input signal at the input end of the driving power supply circuit and feeding back the real-time input signal to the main control chip U1. The main control chip U1 finds the corresponding first electric energy parameter from the electric energy metering database according to the real-time input signal. The main control chip U1 simultaneously controls the output signal of the driving module (20).

2. The driving power supply circuit according to claim 1, characterized in that: The electric energy metering database includes a plurality of output signals and a plurality of groups of second electric energy parameters corresponding one to one with the output signals. The main control chip U1 is capable of sampling the real-time output signal of the driving module (20). The main control chip U1 finds the corresponding second electric energy parameter from the electric energy metering database according to the real-time output signal.

3. The driving power supply circuit according to claim 2, characterized in that: The first electric energy parameter and the second electric energy parameter respectively include input voltage, input current, power factor, active power, apparent power, reactive power, apparent energy, active energy, and reactive energy.

4. The driving power supply circuit according to claim 2, characterized in that: It also includes a display module, which is electrically connected to the main control chip U1 to display the corresponding first power parameter and the second power parameter.

5. The driving power supply circuit according to claim 1, characterized in that: The sampling module (10) comprises an analog signal sampling unit and an analog-to-digital conversion unit, wherein the input end of the analog signal sampling unit is used to sample the input signal of the driving power supply circuit, the output end of the analog signal sampling unit is electrically connected to the input end of the analog-to-digital conversion unit, and the output end of the analog-to-digital conversion unit is electrically connected to the main control chip U1.

6. The driving power supply circuit according to claim 1, characterized in that: It also comprises an isolation module (30), one end of the isolation module (30) being electrically connected to the sampling module (10), and the other end of the isolation module (30) being electrically connected to the main control chip U1.

7. The driving power supply circuit according to claim 1, characterized in that: It also comprises a rectifier module (40), the input end of the rectifier module (40) being electrically connected to the mains, and the input end of the sampling module (10) being electrically connected to the output end of the rectifier module (40).

8. The driving power supply circuit according to claim 7, characterized in that: It also comprises a step-down isolation module (50), the input end of the step-down isolation module (50) being electrically connected to the output end of the rectifier module (40), and the output end of the step-down isolation module (50) being electrically connected to the drive module (20).

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