Low-power-consumption isolation type remote communication power supply system

Abstract

The utility model relates to a low power consumption isolation type remote communication power supply system, which comprises an electric energy sending end and a power utilization terminal which are arranged on a communication bus, the power utilization terminal comprises a data sending module, a data receiving module, a rectification filtering module and a second isolation transformer, the primary side of the second isolation transformer is connected to the communication bus, and the secondary side of the second isolation transformer is connected to the communication bus. The secondary side is connected to the output end of the data transmitting module, the input end of the data receiving module and the input end of the rectifying and filtering module, the electric energy transmitting end comprises a power switch circuit and a switch control circuit, the input end of the power switch circuit is connected to a direct-current power supply, and the control signal input end is connected to the switch control circuit; the electric energy transmitting end comprises a first isolation transformer and a low-pass filter, the output end of the power switch circuit is connected to the primary side of the isolation transformer through the low-pass filter, and the secondary side of the isolation transformer is connected to the communication bus. Compared with the prior art, the electric energy is transmitted based on the communication bus, and the communication window time and the like can be reported when more electric terminals are supported.

Description

TECHNICAL FIELD

[0001] The utility model relates to communication line power supply scheme especially, relate to a kind of low-power consumption isolated remote communication power supply system. BACKGROUND

[0002] Internet of Things networking relies on communication between devices, at present, the networking of Internet of Things mainly relies on wired or wireless, in addition, Internet of Things devices also need power supply, and the power supply of Internet of Things devices is the main problem at present, and there are two main solutions:

[0003] 1, adopt power line,

[0004] 2, adopt battery;

[0005] For the power supply using power line, each Internet of Things device needs to be configured with an AC / DC module, which will increase the cost and increase energy consumption, and for the battery power supply mode, it will lead to frequent maintenance to replace the battery.

[0006] For this, some prior art chooses to adopt the way of communication line power-on, that is, POE power supply technology, but POE power supply technology also has problems, because POE power supply technology can provide limited power, and cannot support multiple devices to be powered simultaneously, generally only the upper gateway powers the individual devices of the lower, so some prior art tries to combine with communication bus, introduces independent power supply, for example, Chinese patent CN101383084A discloses an isolated bus power supply communication system, which specifically includes a power module, the power module includes power switch circuit and switch control circuit, through switch control circuit, power switch circuit is full-bridge inverter circuit composed of power MOS tube, switch control circuit is composed of microcontroller and driver of power MOS tube, the input end of power switch circuit is connected to direct-current power supply, and the output end is connected to communication bus, on the receiving side, it simultaneously includes signal receiving module and signal sending module, and rectifier voltage stabilizing circuit, the three are connected to communication bus through same isolation transformer, in this way, the power problem of POE power-on is solved by introducing power module.

[0007] However, in this way, the signal outputted by the power switch circuit is a square wave, because the square wave actually contains multiple sine waves of different orders, which will interfere with the communication signal on the communication bus at the receiving end. In order to solve this problem and improve the communication quality, Chinese patent CN101383084A adopts a time-division power supply mode, as shown in its Figure 5, which includes a positive power supply stage, a negative power supply stage, a magnetic reset stage and a data communication stage in each cycle. Although this solves the problem of communication quality, it actually causes the problem of too short communication time window, because only in the data communication stage can communication be carried out. Therefore, if the cycle is too long, the data cannot be sent in time, and if the cycle is short, although the immediacy of data transmission can be ensured, the time window allocated to a single device is not enough to send all the data by using the time-division multiplexing mode. In addition, the power supply module of the above-mentioned power supply communication system is not isolated when connected to the communication bus, which is also easy to cause harmonic impact on subsequent devices. Practical new type content

[0008] The purpose of the present utility model is to provide a low-power consumption isolation type remote communication power supply system.

[0009] The purpose of the present utility model can be realized by the following technical solutions:

[0010] A low-power consumption isolation type remote communication power supply system, comprising an electric energy sending end and a power consumption terminal arranged on a communication bus, the power consumption terminal comprising a data sending module, a data receiving module, a rectification filtering module and a second isolation transformer, the primary side of the second isolation transformer being connected to the communication bus, the secondary side being connected to the output end of the data sending module, the input end of the data receiving module and the input end of the rectification filtering module respectively, the electric energy sending end comprising a power switch circuit and a switch control circuit, the input end of the power switch circuit being connected to a direct current power supply, and the control signal input end being connected to the switch control circuit; the electric energy sending end comprising a first isolation transformer and a low-pass filter, the output end of the power switch circuit being connected to the primary side of the isolation transformer through the low-pass filter, and the secondary side of the isolation transformer being connected to the communication bus.

[0011] The power switch circuit comprises a first MOS switch tube, a second MOS switch tube, a third MOS switch tube, a fourth MOS switch tube and a second capacitor, one end of the second capacitor being connected to the positive pole of the direct current power supply, and the other large end being connected to the negative pole of the direct current power supply, the gates of the first MOS switch tube, the second MOS switch tube, the third MOS switch tube and the fourth MOS switch tube being connected to the switch control circuit.

[0012] The input end source of the first MOS switch tube is connected to the first end of the primary side of the first isolation transformer, and the drain is connected to the negative pole of the direct current power supply; the source of the second MOS switch tube is connected to the positive pole of the direct current power supply, and the drain is connected to the first end of the primary side of the first isolation transformer; the source of the third MOS switch tube is connected to the second end of the primary side of the first isolation transformer, and the drain is connected to the positive pole of the direct current power supply; and the source of the fourth MOS switch tube is connected to the negative pole of the direct current power supply, and the drain is connected to the second end of the primary side of the first isolation transformer.

[0013] The first MOS switch tube, the second MOS switch tube, the third MOS switch tube and the fourth MOS switch tube are N-channel MOS tubes.

[0014] A low-power-consumption isolated remote communication power supply system comprises an electric energy sending end and a power consumption terminal arranged on a communication bus, wherein the power consumption terminal comprises a data sending module, a data receiving module, a rectification filtering module and a second isolation transformer, the primary side of the second isolation transformer is connected to the communication bus, and the secondary side is connected to the output end of the data sending module, the input end of the data receiving module and the input end of the rectification filtering module respectively; the electric energy sending end comprises an input end connected to a main power supply and an output end connected to the communication bus.

[0015] The electric energy sending end comprises a step-down transformer, a low-pass filter and a first isolation transformer, the main power supply is an alternating current power supply, the primary side of the step-down transformer is connected to the main power supply, the secondary side is connected to the primary side of the first isolation transformer through the low-pass filter, and the secondary side of the first isolation transformer is connected to the communication bus.

[0016] The rectification filtering module comprises a first rectification circuit and a second filtering circuit.

[0017] The first rectification circuit is a full-bridge rectification circuit, and the second filtering circuit comprises a first capacitor.

[0018] The power consumption terminal is provided with a plurality of power consumption terminals.

[0019] The low-pass filter is a passive filter circuit or an active filter circuit.

[0020] The step-down transformer is a multi-tap transformer.

[0021] Compared with the prior art, the low-power-consumption isolated remote communication power supply system has the following beneficial effects:

[0022] 1. The sinusoidal AC power is obtained by a low-pass filter or a transformer, so that the power provided to the communication bus is in the form of a sinusoidal wave, containing less high-frequency components, based on which, the high-frequency communication signal will not be disturbed, and the data receiving module can filter the power by frequency division, so that power supply and communication can be realized at the same time in the whole cycle, and the communication bus can report the communication window time while transmitting power, so as to support more power-consuming terminals.

[0023] 2. The power switch circuit is used for inverting, so that it is suitable for the case that the power supply is DC power, and can be separated from the lighting circuit without affecting each other.

[0024] 3. The step-down transformer is used, so that it can be directly connected to the lighting circuit, and the arrangement efficiency is higher.

[0025] 4. The second capacitor is configured, so that the high-order harmonic component can be reduced, and the power-consuming terminal is protected. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 It is a structural schematic diagram of the utility model;

[0027] Figure 2 It is a schematic diagram of the power transmitting end in the embodiment 1 of the utility model;

[0028] Figure 3 It is a schematic diagram of the power-consuming terminal of the utility model;

[0029] Figure 4 It is a schematic diagram of the power transmitting end in the embodiment 2 of the utility model;

[0030] 1, the power transmitting end, 2, the power-consuming terminal, T1, the first isolation transformer, T2, the second isolation transformer, U1, the low-pass filter, Q1, the first MOS switch tube, Q2, the second MOS switch tube, Q3, the third MOS switch tube, Q4, the fourth MOS switch tube, C1, the first capacitor, C2, the second capacitor, VCC, the DC power supply, E2, the AC power supply, VT1, the first rectifier circuit, VDD1, the power output positive pole, T3, the step-down transformer. DETAILED DESCRIPTION

[0031] The utility model will be described in detail in combination with the drawings and specific embodiments. The embodiment is implemented on the premise of the technical scheme of the utility model, and detailed implementation mode and specific operation process are given, but the protection scope of the utility model is not limited to the following embodiments.

[0032] It should be noted that: similar signs and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0033] In the description of the utility model, it needs to explain that, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "internal", "external" and so on indicate the orientation or position relation based on the orientation or position relation shown in the drawing, only for the convenience of describing the utility model and simplifying the description, and not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, therefore, it cannot be understood as a limitation on the utility model. In addition, the terms "proximal end", "distal end", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance. The physical quantities in the formula, such as no separate marking, should be understood as the basic quantity of the international system of units, or the derived quantity derived from the basic quantity by multiplication, division, differentiation or integration and other mathematical operations.

[0034] In addition, the terms "horizontal", "vertical", "overhanging" and other terms do not mean that the component must be absolutely horizontal or overhanging, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0035] In the description of the utility model, it also needs to explain that, unless otherwise specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0036] Some embodiments of the utility model will be described in detail below in combination with the drawings. In the case of no conflict, the following examples and the features in the examples can be combined with each other.

[0037] Example 1

[0038] A low-power consumption isolation type remote communication power supply system, as shown in Figure 1 Similar to the prior art, it comprises an electric energy sending end 1 and a power consumption terminal 2 arranged on a communication bus, the power consumption terminal 2 comprises a data sending module, a data receiving module, a rectification filtering module and a second isolation transformer T2, the primary side of the second isolation transformer T2 is connected to the communication bus, V+ and V- in the figure are the positive line and the negative line of the communication bus respectively, the secondary side is connected to the output end of the data sending module, the input end of the data receiving module and the input end of the rectification filtering module respectively, the electric energy sending end 1 comprises a power switch circuit and a switch control circuit, the input end of the power switch circuit is connected to a direct current power supply VCC, and the control signal input end is connected to the switch control circuit;

[0039] In particular, such as Figure 2 As shown, in this embodiment, the power transmitting end 1 also includes a first isolation transformer T1 and a low-pass filter U1. The output end of the power switching circuit is connected to the primary side of the isolation transformer through the low-pass filter U1, and the secondary side of the isolation transformer is connected to the communication bus. In this way, sinusoidal AC power is obtained through the low-pass filter U1, so the power supplied to the communication bus is in the form of a sine wave, containing fewer high-frequency components. Based on this, it will not interfere with high-frequency communication signals. The data receiving module can filter the power through frequency division, thereby realizing simultaneous power supply and communication throughout the entire cycle. While transmitting power based on the communication bus, the communication window time can be reported when supporting more power-consuming terminals 2.

[0040] Since the power supply signal is generally 50Hz, the frequencies of the communication signal and the power supply signal differ greatly. How the data receiving module filters the sinusoidal signal of the power supply through frequency division has been mastered by those skilled in the art. Therefore, in order to avoid obscuring the purpose of this application, it will not be described in detail here.

[0041] It uses a power switching circuit for inversion, making it suitable for DC power supply situations. It can be separated from the lighting circuit and will not affect each other.

[0042] In this embodiment, the power switching circuit includes a first MOS switch Q1, a second MOS switch Q2, a third MOS switch Q3, a fourth MOS switch Q4, and a second capacitor C2. One end of the second capacitor C2 is connected to the positive terminal of the DC power supply VCC, and the other end is connected to the negative terminal of the DC power supply VCC. The gates of the first MOS switch Q1, the second MOS switch Q2, the third MOS switch Q3, and the fourth MOS switch Q4 are all connected to the switching control circuit. By configuring the second capacitor C2, the components of high-order harmonics can be reduced, thus protecting the power terminal 2.

[0043] Generally, the source of the first MOS switch Q1 is connected to the first terminal of the primary side of the first isolation transformer T1, and the drain is connected to the negative terminal of the DC power supply VCC. The source of the second MOS switch Q2 is connected to the positive terminal of the DC power supply VCC, and the drain is connected to the first terminal of the primary side of the first isolation transformer T1. The source of the third MOS switch Q3 is connected to the second terminal of the primary side of the first isolation transformer T1, and the drain is connected to the positive terminal of the DC power supply VCC. The source of the fourth MOS switch Q4 is connected to the negative terminal of the DC power supply VCC, and the drain is connected to the second terminal of the primary side of the first isolation transformer T1.

[0044] The first MOS switch Q1, the second MOS switch Q2, the third MOS switch Q3, and the fourth MOS switch Q4 are all N-channel MOS transistors.

[0045] In this embodiment, the rectification and filtering module includes a first rectification circuit VT1 and a second filtering circuit, as shown in Figure 3 The first rectification circuit VT1 is a full-bridge rectification circuit, and the second filtering circuit includes a first capacitor C1, as shown in Figure 1 As shown in

[0046] In addition, in most embodiments, the low-pass filter U1 is an active filter circuit, so that the quality of filtering can be improved, of course, in other embodiments, a passive filter can also be used.

[0047] Embodiment 2

[0048] This embodiment is basically the same as embodiment 1, so the same will not be described, only the different, the significant difference between this embodiment and embodiment 1 is that the main power supply connected to the power transmitting end 1 in this embodiment is an alternating current power supply E2, and the power transmitting end 1 uses a step-down transformer T3 as the main component, specifically, a low-power isolated remote communication power supply system, as shown in Figure 1 The power transmitting end 1 and the power consuming terminal 2 arranged on the communication bus, the power consuming terminal 2 includes a data transmitting module, a data receiving module, a rectification and filtering module and a second isolation transformer T2, the primary side of the second isolation transformer T2 is connected to the communication bus, the secondary side is connected to the output end of the data transmitting module, the input end of the data receiving module and the input end of the rectification and filtering module respectively, the power transmitting end 1 includes an input end connected to the main power supply and an output end connected to the communication bus;

[0049] As shown in Figure 4 The power transmitting end 1 includes a step-down transformer T3, a low-pass filter U1 and a first isolation transformer T1, the main power supply is an alternating current power supply E2, the primary side of the step-down transformer T3 is connected to the main power supply, the secondary side is connected to the primary side of the first isolation transformer T1 through the low-pass filter U1, and the secondary side of the first isolation transformer T1 is connected to the communication bus.

[0050] In some embodiments, the step-down transformer T3 is a multi-tap transformer, so that the supply voltage can be adjusted.

Claims

1. A low-power consumption isolated remote communication power supply system, comprising a power transmitting end and a power consuming end arranged on a communication bus, the power consuming end comprising a data transmitting module, a data receiving module, a rectification and filtering module and a second isolation transformer, a primary side of the second isolation transformer being connected to the communication bus, a secondary side of the second isolation transformer being connected to an output end of the data transmitting module, an input end of the data receiving module and an input end of the rectification and filtering module respectively, the power transmitting end comprising a power switch circuit and a switch control circuit, an input end of the power switch circuit being connected to a direct current power supply, a control signal input end being connected to the switch control circuit; characterized in that, The power transmitting end comprises a first isolation transformer and a low-pass filter, an output end of the power switch circuit is connected to a primary side of the isolation transformer through the low-pass filter, and a secondary side of the isolation transformer is connected to the communication bus.

2. The low power isolated remote power supply system of claim 1, wherein, The power switch circuit comprises a first MOS switch tube, a second MOS switch tube, a third MOS switch tube, a fourth MOS switch tube and a second capacitor, one end of the second capacitor is connected to a positive pole of the direct-current power supply, the other end is connected to a negative pole of the direct-current power supply, and gates of the first MOS switch tube, the second MOS switch tube, the third MOS switch tube and the fourth MOS switch tube are connected to the switch control circuit.

3. A low power isolated remote power supply system according to claim 2, wherein, An input end source of the first MOS switch tube is connected to a first end of the primary side of the first isolation transformer, a drain is connected to the negative pole of the direct-current power supply, a source of the second MOS switch tube is connected to the positive pole of the direct-current power supply, a drain is connected to the first end of the primary side of the first isolation transformer, a source of the third MOS switch tube is connected to a second end of the primary side of the first isolation transformer, a drain is connected to the positive pole of the direct-current power supply, and a source of the fourth MOS switch tube is connected to the negative pole of the direct-current power supply, a drain is connected to the second end of the primary side of the first isolation transformer.

4. The low power isolated remote power supply system of claim 2, wherein, The first MOS switch tube, the second MOS switch tube, the third MOS switch tube and the fourth MOS switch tube are N-channel MOS tubes.

5. A low-power-consumption isolated remote communication power supply system, comprising a power transmitting end and a power consuming terminal arranged on a communication bus, the power consuming terminal comprising a data transmitting module, a data receiving module, a rectification and filtering module and a second isolation transformer, a primary side of the second isolation transformer is connected to the communication bus, a secondary side is connected to an output end of the data transmitting module, an input end of the data receiving module and an input end of the rectification and filtering module respectively, and the power transmitting end comprises an input end connected to a main power supply and an output end connected to the communication bus. characterized in that The power transmitting end comprises a step-down transformer, a low-pass filter and a first isolation transformer, the main power supply is an alternating-current power supply, a primary side of the step-down transformer is connected to the main power supply, a secondary side is connected to a primary side of the first isolation transformer through the low-pass filter, and a secondary side of the first isolation transformer is connected to the communication bus.

6. A low power consumption isolated remote communication power supply system according to claim 1 or 5, characterized in that, The rectification and filtering module comprises a first rectification circuit and a second filtering circuit.

7. A low power consumption isolated remote communication power supply system according to claim 6, wherein, The first rectification circuit is a full-bridge rectification circuit, and the second filtering circuit comprises a first capacitor.

8. The low power consumption isolated remote communication power supply system according to claim 1 or 5, wherein, The power consuming terminal is provided with a plurality of power consuming terminals.

9. The low power consumption isolated remote communication power supply system according to claim 1 or 5, wherein, The low-pass filter is a passive filter circuit or an active filter circuit.

10. The low power isolated remote power supply system of claim 5, wherein, The step-down transformer is a multi-tap transformer.

Images