A receiving end series-parallel switching circuit for a multipolarity transmitting device

Abstract

The present invention relates to the field of dynamic wireless power supply technology, and more particularly to a receiving-end series-parallel switching circuit for a multipolarity transmitting device. The circuit comprises a first transmitting module, a second transmitting module, a first receiving module, a second receiving module, and a series-parallel switching circuit. The first transmitting module and the second transmitting module transmit energy to the first receiving module and the second receiving module via wireless transmission. The first receiving module and the second receiving module are electrically connected to the series-parallel switching circuit. The present invention provides a receiving-end series-parallel switching circuit for a multipolarity transmitting device. The circuit has a simple circuit structure. By combining multiple switching switches and diodes, the circuit can effectively alleviate the problem of power reduction near the junction of segmented transmitting coils at the receiving end, while also enabling flexible series-parallel switching at the receiving end.

Description

Technical Field

[0001] The present invention relates to the technical field of dynamic wireless power supply, and in particular to a receiving end series-parallel switching circuit for a multi-polarity transmitting device. Background Art

[0002] Currently, the primary transmitting coil structure of dynamic wireless power transmission systems mostly adopts a segmented track structure. In segmented guide-rail dynamic wireless charging systems, conventional unipolar transmitting coils and unipolar receiving coils are often used as the system's coupling device. Traditional unipolar receiving devices output a single power source, making it difficult to meet the varying power demands of loads in different scenarios and with fixed load types. The unipolar transmitting coils, where the currents flowing in opposite directions at the intersection of the track segments, weaken the magnetic field near the primary coil intersection, resulting in a significant drop in the mutual inductance between the transmitting and receiving coils, affecting the system's stable operation.

[0003] Various solutions have been proposed to reduce the mutual inductance of coil coupling and output a single electrical energy problem, but the circuit structure is complex, the control is difficult, and the loss is large. Summary of the Invention

[0004] To address the shortcomings of existing algorithms, the present invention provides a series-parallel switching circuit for the receiving end of a multi-polarity transmitting device. The circuit structure is simple. By combining multiple switching tubes and diodes, the circuit can effectively improve the problem of power reduction near the intersection of segmented transmitting coils at the receiving end, while also realizing flexible series-parallel switching at the receiving end.

[0005] The technical solution adopted by the present invention is: a receiving-end series-parallel switching circuit for a multi-polarity transmitting device includes: a first transmitting module, a second transmitting module, a first receiving module, a second receiving module and a series-parallel switching circuit, the first transmitting module and the second transmitting module transmit energy to the first receiving module and the second receiving module through wireless transmission, and the first receiving module and the second receiving module are electrically connected to the series-parallel switching circuit.

[0006] Furthermore, the first transmitting module and the second transmitting module are connected in anti-parallel via S4 and S5 to the AC power supply U AC At both ends, two adjacent coils L p1 and L p2 The phase difference of the currents is 180°.

[0007] Furthermore, the series-parallel switching circuit includes: switching tubes S1-S3, diodes D1-D7, S1-S3 are MOS tubes with parasitic diodes; the cathode of D7 is connected to L s1 The upper end of D7 is connected to the anode of C s2 The source of S3 is connected to the upper end of C s1 The lower end is connected to the drain and L s2The lower end of S1 is connected to the source of C s1 The lower end is connected to the drain of S2; the source of S2 is connected to C s2 The upper end of D1 is connected to the common end of the cathode of D4 and the upper end of D1 is connected to the common end of L s1 The common end of the anode of D2 and the cathode of D5 is connected to the drain of S1 and S2; the common end of the anode of D3 and the cathode of D6 is connected to L s2 The lower end is connected.

[0008] Furthermore, the operating mode of the series-parallel switching circuit includes: the first transmitting module or the second transmitting module works alone, and the switching switch tube S4 or the switching switch tube S5 is turned on; when the first receiving module and the second receiving module simultaneously receive energy from the first transmitting module or the first receiving module and the second receiving module simultaneously receive energy from the second transmitting module, S1 and S2 are turned on, and S3 is turned off, so that the first receiving module and the second receiving module are connected in series to supply energy to the load end.

[0009] Furthermore, the operating mode of the series-parallel switching circuit also includes: the first transmitting module or the second transmitting module works alone, and the switching switch tube S4 or the switching switch tube S5 is turned on; when the first receiving module and the second receiving module simultaneously receive energy from the first transmitting module or the first receiving module and the second receiving module simultaneously receive energy from the second transmitting module, S3 is turned on, S1 and S2 are turned off, so that the first receiving module and the second receiving module are connected in parallel to supply energy to the load end.

[0010] Furthermore, the operating mode of the series-parallel switching circuit also includes: the first transmitting module and the second transmitting module work simultaneously, and the switching switch tube S4 and the switching switch tube S5 are turned on; when the first receiving module receives the energy of the first transmitting module and the second receiving module receives the energy of the second transmitting module, S1 is turned off, S2 and S3 are turned on, so that the first receiving module and the second receiving module are connected in series to supply energy to the load end.

[0011] Furthermore, the operating mode of the series-parallel switching circuit also includes: the first transmitting module and the second transmitting module work simultaneously, and the switching switch tube S4 and the switching switch tube S5 are turned on; when the first receiving module receives the energy of the first transmitting module and the second receiving module receives the energy of the second transmitting module, S1 and S2 are turned on, and S3 is turned off, so that the first receiving module and the second receiving module are connected in parallel to supply energy to the load end.

[0012] Beneficial effects of the present invention:

[0013] Aiming at the reduction of receiving end output energy due to the reverse magnetic field generated by the reverse current flowing into adjacent transmitting coils, a series-parallel switching output circuit for the receiving end is proposed. The output current can be increased by parallel connection, and the output voltage can be increased by series connection to meet the power requirements of the load in different occasions. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a series-parallel switching circuit diagram of a receiving end for a multipolarity transmitting device of the present invention;

[0015] Figure 2 This is a schematic diagram of the positive cycle current flow at the receiving end in working mode 1 of the present invention;

[0016] Figure 3 This is a schematic diagram of the negative periodic current flow at the receiving end in working mode 1 of the present invention;

[0017] Figure 4 This is a schematic diagram of the positive cycle current flow at the receiving end in working mode 2 of the present invention;

[0018] Figure 5 This is a schematic diagram of the negative periodic current flow at the receiving end in working mode 2 of the present invention;

[0019] Figure 6 This is a schematic diagram of the positive cycle current flow at the receiving end of working mode 3 of the present invention;

[0020] Figure 7 This is a schematic diagram of the negative periodic current flow at the receiving end of the working mode 3 of the present invention;

[0021] Figure 8 This is a schematic diagram of the positive cycle current flow at the receiving end of working mode 4 of the present invention;

[0022] Figure 9 This is a schematic diagram of the negative periodic current flow at the receiving end in working mode 4 of the present invention. DETAILED DESCRIPTION

[0023] The present invention will be further described below in conjunction with the accompanying drawings and embodiments. This figure is a simplified schematic diagram, which only illustrates the basic structure of the present invention in a schematic manner, and therefore only shows the components related to the present invention.

[0024] like Figure 1 As shown, a receiving end series-parallel switching circuit for a multi-polarity transmitting device includes:

[0025] The first transmitting module, the second transmitting module, the first receiving module, the second receiving module and the series-parallel switching circuit, the first transmitting module and the second transmitting module transmit energy to the first receiving module and the second receiving module through wireless transmission, and the first receiving module and the second receiving module are electrically connected to the series-parallel switching circuit.

[0026] The energy transmitting end includes: a first transmitting module and a second transmitting module, and the energy receiving end includes: a first receiving module and a second receiving module;

[0027] The energy transmitter is used to transmit power energy. The circuit topology specifically includes an AC power supply U AC The first transmitting module includes a transmitting coil L p1 , switch tube S4, resonant compensation capacitor C p1 and the transmitting coil internal resistance R p1 The second transmitting module includes a transmitting coil L p2 , switch tube S5, resonant compensation capacitor C p2 and the transmitting coil internal resistance R p2 The first transmitting module and the second transmitting module are connected in anti-parallel via S4 and S5 in the AC power supply U AC At both ends, two adjacent coils L p1 and L p2 The phase difference of the currents is 180°, and the switching tubes S4 and S5 are MOSFET tubes;

[0028] The energy receiving end is used to receive power supply energy. The circuit topology specifically includes: the first receiving module includes a receiving coil L s1 , resonant compensation capacitor C s1 The second receiving module includes a receiving coil L s2 , resonant compensation capacitor C s2 ;

[0029] The series-parallel switching circuit includes: switching tubes S1-S3, diodes D1-D7, S1-S3 are MOS tubes with parasitic diodes; the cathode of D7 is connected to L s1 The upper end of D7 is connected to the anode of C s2 The source of S3 is connected to the upper end of C s1 The lower end is connected to the drain and L s2 The lower end of S1 is connected to the source of C s1 The lower end is connected to the drain of S2; the source of S2 is connected to C s2 The upper end of D1 is connected to the common end of the cathode of D4 and the upper end of D1 is connected to the common end of L s1 The common end of the anode of D2 and the cathode of D5 is connected to the drain of S1 and S2; the common end of the anode of D3 and the cathode of D6 is connected to L s2 The lower end is connected.

[0030] The load end includes the filter capacitor C d And the load R, the load is supplied with energy through the receiving coil.

[0031] The energy receiving end is in a mobile state and can be p1 and the transmitting coil L p2 Move upward;

[0032] The resonance condition formula that the circuit needs to meet is:

[0033] L p1 =L p2 ;L s1 =L s2 ; C p1 =C p2 ; C s1 =C s2 ;

[0034]

[0035] Where ω is the angular frequency of the alternating current.

[0036] The power supply track adopts segmented power supply. According to the switching state of the primary side transmitting module, the dynamic wireless power supply system has four working modes according to different power supply requirements in the whole cycle:

[0037] Mode 1: When only coil L p1 or coil L p2 When used as a transmitting coil, S4 or S5 is turned on; the receiving coil L s1 and L s2 Both are used to receive L p1 or L p2 The energy transmitted, S1 and S2 are turned on, S3 is turned off, so that the two receiving coils are connected in series to supply energy to the load;

[0038] like Figure 2 Under the condition of mode 1 shown, when the receiving end is in the positive cycle current flow direction, the current passes through the loop formed by the energy receiving end, S1, S2, D1 and D6, and the energy receiving end is connected in series to supply energy to the load R;

[0039] like Figure 3 Under the condition of mode 1 shown, when the receiving end is in the negative cycle current flow direction, the current passes through the loop formed by the energy receiving end, S1, S2, D3 and D4, so that the energy receiving end supplies energy to the load R in series.

[0040] Mode 2: When only coil L p1 or coil L p2 When used as a transmitting coil, S4 or S5 is turned on; the receiving coil L s1 and L s2 Both are used to receive L p1 or L p2 The energy transmitted, S3 is turned on, S1 and S2 are turned off, so that the two receiving coils are connected in parallel to supply energy to the load;

[0041] like Figure 4 Under the condition of mode 2 shown, when the receiving end is in the positive cycle current flow direction, the current passes through the loop formed by the energy receiving end, S3, D1, D6 and D7, realizing the energy receiving end supplying energy to the load R in parallel;

[0042] like Figure 5 Under the condition of mode 2 shown, when the receiving end is in the negative cycle current flow direction, the current passes through the loop formed by the energy receiving end, the parasitic diode of S2, S3, D3, D5 and D7, so that the energy receiving end can supply energy to the load R in parallel.

[0043] Mode 3: When coil L p1 and coil L p2 When used as a transmitting coil, S4 and S5 are always turned on, and the receiving coil L s1 and L s2 Used to receive L p1 and L p2 The emitted energy, i.e. L s1 Receive L p1 , L s2 Receive L p2 ; S1 is turned off, S2 and S3 are turned on, so that the two receiving coils are connected in series to supply energy to the load;

[0044] like Figure 6 Under the condition of mode 3 shown, when the receiving end is in the positive cycle current flow direction, the current passes through the loop formed by the energy receiving end, S2, S3, D1 and D5, and the energy receiving end is connected in series to supply energy to the load R;

[0045] like Figure 7 Under the condition of mode 3 shown, when the receiving end is in the negative cycle current flow direction, the current passes through the loop formed by the energy receiving end, S2, S3, D2 and D4, so that the energy receiving end can supply energy to the load R in series.

[0046] Mode 4: When coil L p1 and coil L p2 When used as a transmitting coil, S5 and S6 are always turned on, and the receiving coil L s1 and L s2 Used to receive L p1 and L p2 The emitted energy, i.e. L s1 Receive L p1 , L s2 Receive L p2 ; S1 and S2 are turned on, and S3 is turned off, so that the two receiving coils are connected in parallel to supply energy to the load;

[0047] like Figure 8 Under the condition of mode 4 shown, when the receiving end is in the positive cycle current flow direction, the current passes through the loop formed by the energy receiving end, S1, S2, D1, D3 and D5, realizing the energy receiving end supplying energy to the load R in parallel;

[0048] like Figure 9Under the conditions of mode 4 shown, when the receiving end is in the negative cycle current flow direction, the current passes through the loop formed by the energy receiving end, S1, S2, D2, D4 and D6, realizing the energy receiving end supplying energy to the load R in parallel.

[0049] The present invention effectively suppresses the drastic changes in the magnetic field near the intersection of adjacent coils in a segmented dynamic wireless power supply system. Through an anti-parallel structure, reverse currents are passed through two adjacent coils, suppressing the mutual inductance drop between the transmitting and receiving coils. A corresponding series-parallel switching circuit is proposed to solve the problem of reduced output power due to the reverse induced electromotive force generated at the receiving end by the reverse magnetic field generated by adjacent transmitting ends.

[0050] With the above-described preferred embodiments of the present invention as a guide, and with reference to the above description, relevant personnel are fully capable of making various changes and modifications without departing from the technical scope of this invention. The technical scope of this invention is not limited to the contents of the specification and must be determined according to the scope of the claims.

Claims

1. A receiving end series-parallel switching circuit for a multi-polarity transmitting device, characterized in that: include: a first transmitting module, a second transmitting module, a first receiving module, a second receiving module, and a series-parallel switching circuit, wherein the first transmitting module and the second transmitting module transmit energy to the first receiving module and the second receiving module via wireless transmission, and the first receiving module and the second receiving module are electrically connected to the series-parallel switching circuit; The first transmitting module and the second transmitting module are connected by switching the switch tube and switching tube Anti-parallel connection in AC power supply At both ends, two adjacent coils and The phase difference of the current ; The first receiving module includes a receiving coil , resonant compensation capacitor ; The second receiving module includes a receiving coil , resonant compensation capacitor ; The series-parallel switching circuit includes: switching tubes S1-S3 and diodes - ; The cathode and The upper end is connected, The anode and The upper end is connected; The source and The lower end is connected to the drain The lower end is connected; The source and The lower end is connected to the drain The drain is connected; The source and The upper end is connected; The anode and The cathode common terminal and The upper end is connected; The anode and The cathode common terminal and and The drain is connected; The anode and The cathode common terminal and The lower end is connected; The lower end of The upper end connection; The upper end of The lower end connection; 、 、 Common cathode; D 4. 、 Common anode.

2. The receiving end series-parallel switching circuit for a multi-polarity transmitting device according to claim 1, characterized in that: The working modes of the series-parallel switching circuit include: the first transmitting module or the second transmitting module works alone, or When the first and second receiving modules simultaneously receive energy from the first transmitting module or the first and second receiving modules simultaneously receive energy from the second transmitting module, and conduction, The first and second receiving modules are connected in series to supply energy to the load end.

3. The receiving end series-parallel switching circuit for a multi-polarity transmitting device according to claim 1, characterized in that: The operation mode of the series-parallel switching circuit also includes: the first transmitting module or the second transmitting module works alone, or When the first and second receiving modules simultaneously receive energy from the first transmitting module or the first and second receiving modules simultaneously receive energy from the second transmitting module, conduction, 、 Turn off, so that the first and second receiving modules are connected in parallel to supply energy to the load end.

4. The receiving end series-parallel switching circuit for a multi-polarity transmitting device according to claim 1, characterized in that: The operation mode of the series-parallel switching circuit also includes: the first and second transmitting modules operate simultaneously, and When the first receiving module receives energy from the first transmitting module and the second receiving module receives energy from the second transmitting module, Shutdown, and The first receiving module and the second receiving module are connected in series to supply energy to the load end.

5. The receiving end series-parallel switching circuit for a multi-polarity transmitting device according to claim 1, characterized in that: The operation mode of the series-parallel switching circuit also includes: the first and second transmitting modules operate simultaneously, and When the first receiving module receives energy from the first transmitting module and the second receiving module receives energy from the second transmitting module, 、 conduction, The first receiving module and the second receiving module are connected in parallel to supply energy to the load end.

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