A wide range input and output voltage equalization resonant circuit

Abstract

A wide range input and output voltage-equalizing resonant circuit includes a transformer module, a primary input module, a first secondary rectifier unit, a second secondary rectifier unit, a first switch unit, a second switch unit and a secondary output unit; the transformer module includes a primary winding, a first secondary winding and a second secondary winding; the primary input module is connected to the primary winding; the opposite end of the first secondary winding is connected to the voltage-equalizing end of the secondary output unit or the input end of the second secondary rectifier unit via the first switch unit, and the same end of the second secondary winding is connected to the voltage-equalizing end of the secondary output unit or the input end of the first secondary rectifier unit via the second switch unit. The wide range input and output voltage-equalizing resonant circuit implementing the present invention can work in different modes, thereby realizing series load voltage equalization in a specific mode and realizing wide range input and output in another specific mode.

Description

Technical Field

[0001] The present invention relates to the field of new energy vehicles, in particular to the field of power modules of new energy vehicles, and more specifically to a wide range input and output voltage equalization resonant circuit. Background Art

[0002] Bidirectional power supplies are increasingly used in new energy systems, electric vehicle systems, outdoor power supplies, integrated charging and discharging machines, home storage systems, and other fields. LLC resonant circuits are widely used due to their excellent soft switching characteristics. However, when LLC resonant circuits are applied to wide input and output voltage scenarios, the resonant cavity parameter design is difficult and full soft switching cannot be achieved. There are large switching losses and low efficiency at non-resonant points. With the widespread application of SICMOSFET, LLC resonant circuits generally use full-bridge rectifier circuits. Figure 1 FIG. 2 shows a circuit diagram of a full-bridge LLC resonant circuit of the prior art. Figure 1 As shown, when the output is a series load R1, R2 and the resistance values ​​are inconsistent (such as UPS output, energy storage off-grid inverter connected to an unbalanced load), the voltage on the resistors R1, R2 will be uneven, making the circuit unable to work normally. When the input and output are in a wide range, the voltage equalization problem caused by the unbalanced load is more prominent, which may eventually cause the entire circuit to fail. Summary of the invention

[0003] The technical problem to be solved by the present invention is that, in view of the above-mentioned defects of the prior art, a wide-range input-output voltage-equalizing resonant circuit is provided, which can operate in different modes, thereby realizing series load voltage equalization in a specific mode and realizing a wide range of input and output in another specific mode, and the entire circuit is exquisitely designed, simple in structure, and does not require additional devices, so the cost is low.

[0004] The technical solution adopted by the present invention to solve the technical problem is: construct a wide range input and output voltage-equalizing resonant circuit, including a transformer module and a primary input module arranged on the primary side of the transformer module, the transformer module includes a primary winding, a first secondary winding and a second secondary winding; the primary input module is connected to the primary winding;

[0005] The wide range input-output voltage-balanced resonant circuit further comprises a first secondary-side rectifying unit, a second secondary-side rectifying unit, a first switch unit, a second switch unit and a secondary-side output unit;

[0006] The same-name end of the first secondary winding is connected to the input end of the first secondary rectifier unit, and the opposite-name end is connected to the voltage-equalizing end of the secondary output unit or the input end of the second secondary rectifier unit via the first switch unit; the same-name end of the second secondary winding is connected to the voltage-equalizing end of the secondary output unit or the input end of the first secondary rectifier unit via the second switch unit, and the opposite-name end is connected to the input end of the second secondary rectifier unit; the first output end of the first secondary rectifier unit is connected to the first output end of the second secondary rectifier unit and the first end of the secondary output unit, and the second output end of the first secondary rectifier unit is connected to the second output end of the second secondary rectifier unit and the second end of the secondary output unit; the first secondary winding and the second secondary winding are the same winding;

[0007] The secondary output unit includes a first load and a second load connected in series between a first end and a second end of the secondary output unit, and a first output capacitor and a second output capacitor connected in series between the first end and the second end of the secondary output unit; a connection point between the first output capacitor and the second output capacitor and a connection point between the first load and the second load are connected to each other as the voltage balancing end of the secondary output unit;

[0008] When the first load and the second load are different loads and need voltage balancing, the first switch unit and the second switch unit are controlled to enter a first switch state, so that the first secondary winding and the second secondary winding are connected in series, so that the opposite-name end of the first secondary winding and the same-name end of the second secondary winding are simultaneously connected to the voltage balancing end of the secondary output unit to balance the first load and the second load;

[0009] When a wide range of input and output is required, the first switch unit and the second switch unit are selected to enter the first switch state or the second switch state according to the relationship between the input and output voltages, so that the first secondary winding and the second secondary winding are respectively connected in series or in parallel to provide different output voltages for the first load and the second load respectively to achieve a wide range of input and output.

[0010] In the wide range input-output voltage-equalizing resonant circuit of the present invention, the first switch unit includes a first switch device, a moving contact of the first switch device is connected to the opposite end of the first secondary winding, a first static contact is connected to the voltage-equalizing end of the secondary output unit, and a second static contact is connected to the input end of the second secondary rectifier unit;

[0011] The second switch unit comprises a second switch device, a moving contact of the second switch device is connected to the same-name end of the second secondary winding, a first static contact is connected to the voltage-sharing end of the secondary output unit, and a second static contact is connected to the input end of the first secondary rectifier unit;

[0012] When the moving contact of the first switch device is connected to its first static contact and the moving contact of the second switch device is connected to its first static contact, the first switch unit and the second switch unit enter a first switch state;

[0013] When the moving contact of the first switching device is conductively connected to its second static contact and the moving contact of the second switching device is conductively connected to its second static contact, the first switching unit and the second switching unit enter a second switching state.

[0014] In the wide range input-output voltage-sharing resonant circuit described in the present invention, the first switching device and the second switching device include mechanical switching devices or semiconductor switching devices; the mechanical switching device includes a relay or a contactor; the semiconductor switching device includes a MOSFET or an IGBT.

[0015] In the wide range input-output voltage-equalizing resonant circuit described in the present invention, the first secondary rectifier unit and the second secondary rectifier unit respectively include two rectifier devices connected in series with each other, and the connection point of the two rectifier devices is the output end of the secondary rectifier unit; the rectifier device includes a diode, a MOSFET or an IGBT.

[0016] In the wide range input-output voltage-equalizing resonant circuit described in the present invention, the primary input module includes an input capacitor, a switch tube full-bridge unit, a resonant capacitor and a resonant inductor; the first input end of the switch tube full-bridge unit is connected to the first end of the input capacitor, the second input end is connected to the second end of the input capacitor, the first output end is connected to the same-name end of the primary winding via the resonant inductor and the resonant capacitor, and the second output end is connected to the opposite-name end of the primary winding.

[0017] In the wide range input-output voltage-equalizing resonant circuit described in the present invention, the primary input module includes a first input capacitor, a second input capacitor, a switch tube half-bridge unit and a resonant inductor; the first input end of the switch tube half-bridge unit is connected to the first end of the first input capacitor, the second input end is connected to the second end of the second input capacitor, and the output end is connected to the same-name end of the primary winding via the resonant inductor, and the second end of the first input capacitor is connected to the first end of the second input capacitor and the opposite-name end of the primary winding.

[0018] In the wide range input-output voltage-equalizing resonant circuit described in the present invention, the primary input module includes an input capacitor, a switch tube half-bridge unit, a resonant capacitor and a resonant inductor; the first input end of the switch tube half-bridge unit is connected to the first end of the input capacitor, the second input end is connected to the second end of the input capacitor and the opposite end of the primary winding, and the output end is connected to the same end of the primary winding via the resonant inductor and the resonant capacitor.

[0019] Another technical solution adopted by the present invention to solve its technical problem is to construct a wide range input and output voltage-equalizing resonant circuit, including a transformer module and a primary input module arranged on the primary side of the transformer module, wherein the transformer module includes a first primary winding, a second primary winding, a third primary winding, a first secondary winding, a second secondary winding, a third secondary winding, a fourth secondary winding, a fifth secondary winding, and a sixth secondary winding;

[0020] The same-named ends of the first primary winding, the second primary winding and the third primary winding are respectively connected to the primary input module, and the opposite-named ends are connected to each other;

[0021] The wide range input-output voltage-balanced resonant circuit further comprises a first secondary-side rectifying unit, a second secondary-side rectifying unit, a third secondary-side rectifying unit, a fourth secondary-side rectifying unit, a fifth secondary-side rectifying unit, a sixth secondary-side rectifying unit, a first switch unit, a second switch unit, a third switch unit, a fourth switch unit, a fifth switch unit, a sixth switch unit and a secondary-side output unit;

[0022] The same-name end of the first secondary winding is connected to the input end of the first secondary rectifier unit, and the opposite-name end is connected to the voltage-equalizing end of the secondary output unit or the input end of the second secondary rectifier unit via the first switch unit; the same-name end of the second secondary winding is connected to the voltage-equalizing end of the secondary output unit or the input end of the first secondary rectifier unit via the second switch unit, and the opposite-name end is connected to the input end of the second secondary rectifier unit; the first output end of the first secondary rectifier unit is connected to the first output end of the second secondary rectifier unit and the first end of the secondary output unit, and the second output end of the first secondary rectifier unit is connected to the second output end of the second secondary rectifier unit and the second end of the secondary output unit;

[0023] The same-name end of the third secondary winding is connected to the input end of the third secondary rectifier unit, and the opposite-name end is connected to the voltage-equalizing end of the secondary output unit or the input end of the fourth secondary rectifier unit via the third switch unit; the same-name end of the fourth secondary winding is connected to the voltage-equalizing end of the secondary output unit or the input end of the third secondary rectifier unit via the fourth switch unit, and the opposite-name end is connected to the input end of the fourth secondary rectifier unit; the first output end of the third secondary rectifier unit is connected to the first output end of the fourth secondary rectifier unit and the first end of the secondary output unit, and the second output end of the third secondary rectifier unit is connected to the second output end of the fourth secondary rectifier unit and the second end of the secondary output unit;

[0024] The same-name end of the fifth secondary winding is connected to the input end of the fifth secondary rectifier unit, and the opposite-name end is connected to the voltage-equalizing end of the secondary output unit or the input end of the sixth secondary rectifier unit via the fifth switch unit; the same-name end of the sixth secondary winding is connected to the voltage-equalizing end of the secondary output unit or the input end of the fifth secondary rectifier unit via the sixth switch unit, and the opposite-name end is connected to the input end of the sixth secondary rectifier unit; the first output end of the fifth secondary rectifier unit is connected to the first output end of the sixth secondary rectifier unit and the first end of the secondary output unit, and the second output end of the fifth secondary rectifier unit is connected to the second output end of the sixth secondary rectifier unit and the second end of the secondary output unit; the first secondary winding, the second secondary winding, the third secondary winding, the fourth secondary winding and the fifth secondary winding are the same winding;

[0025] The secondary output unit includes a first load and a second load connected in series between a first end and a second end of the secondary output unit, and a first output capacitor and a second output capacitor connected in series between the first end and the second end of the secondary output unit; a connection point between the first output capacitor and the second output capacitor and a connection point between the first load and the second load are connected to each other as the voltage balancing end of the secondary output unit;

[0026] When the first load and the second load are different loads and need voltage balancing, the first switch unit, the second switch unit, the third switch unit, the fourth switch unit, the fifth switch unit and the sixth switch unit are controlled to enter the first switch state, so that the first secondary winding, the second secondary winding, the third secondary winding, the fourth secondary winding, the fifth secondary winding and the sixth secondary winding are connected in series; therefore, the opposite-name end of the first secondary winding, the same-name end of the second secondary winding, the opposite-name end of the third secondary winding, the same-name end of the fourth secondary winding, the opposite-name end of the fifth secondary winding and the same-name end of the sixth secondary winding are simultaneously connected to the voltage balancing end of the secondary output unit to balance the first load and the second load;

[0027] When a wide range of input and output is required, the first switch unit, the second switch unit, the third switch unit, the fourth switch unit, the fifth switch unit and the sixth switch unit are selected to enter the first switch state or the second switch state according to the relationship between the input and output voltages, so that the first secondary winding, the second secondary winding, the third secondary winding, the fourth secondary winding, the fifth secondary winding and the sixth secondary winding are respectively connected in series or in parallel to provide different output voltages for the first load and the second load respectively to achieve a wide range of input and output.

[0028] In the wide range input-output voltage-equalizing resonant circuit of the present invention, the first switch unit includes a first switch device, a moving contact of the first switch device is connected to the opposite end of the first secondary winding, a first static contact is connected to the voltage-equalizing end of the secondary output unit, and a second static contact is connected to the input end of the second secondary rectifier unit;

[0029] The second switch unit comprises a second switch device, a moving contact of the second switch device is connected to the same-name end of the second secondary winding, a first static contact is connected to the voltage-sharing end of the secondary output unit, and a second static contact is connected to the input end of the first secondary rectifier unit;

[0030] The third switch unit comprises a third switch device, wherein a moving contact of the third switch device is connected to the opposite-name end of the third secondary winding, a first static contact is connected to the voltage-sharing end of the secondary output unit, and a second static contact is connected to the input end of the fourth secondary rectifier unit;

[0031] The fourth switch unit comprises a fourth switch device, a moving contact of the fourth switch device is connected to the same-name end of the fourth secondary winding, a first static contact is connected to the voltage-sharing end of the secondary output unit, and a second static contact is connected to the input end of the third secondary rectifier unit;

[0032] The fifth switch unit comprises a fifth switch device, wherein a moving contact of the fifth switch device is connected to the opposite-name end of the fifth secondary winding, a first static contact is connected to the voltage-sharing end of the secondary output unit, and a second static contact is connected to the input end of the sixth secondary rectifier unit;

[0033] The sixth switch unit comprises a sixth switch device, a moving contact of the sixth switch device is connected to the same-name end of the sixth secondary winding, a first static contact is connected to the voltage-sharing end of the secondary output unit, and a second static contact is connected to the input end of the fifth secondary rectifier unit;

[0034] When the moving contact of the first switch device is connected to its first static contact, the moving contact of the second switch device is connected to its first static contact, the moving contact of the third switch device is connected to its first static contact, the moving contact of the fourth switch device is connected to its first static contact, the moving contact of the fifth switch device is connected to its first static contact, and the moving contact of the sixth switch device is connected to its first static contact, the first switch unit, the second switch unit, the third switch unit, the fourth switch unit, the fifth switch unit, and the sixth switch unit enter the first switch state;

[0035] When the moving contact of the first switching device is connected to its second static contact, the moving contact of the second switching device is connected to its second static contact, the moving contact of the third switching device is connected to its second static contact, the moving contact of the fourth switching device is connected to its second static contact, the moving contact of the fifth switching device is connected to its second static contact, and the moving contact of the sixth switching device is connected to its second static contact, the first switching unit, the second switching unit, the third switching unit, the fourth switching unit, the fifth switching unit and the sixth switching unit enter the second switching state.

[0036] In the wide range input-output voltage-equalizing resonant circuit described in the present invention, the first switching device, the second switching device, the third switching device, the fourth switching device, the fifth switching device and the sixth switching device include mechanical switching devices or semiconductor switching devices; the mechanical switching device includes a relay or a contactor; the semiconductor switching device includes a MOSFET or an IGBT.

[0037] The wide range input and output voltage-equalizing resonant circuit of the present invention can work in different modes, thereby realizing voltage equalization of series loads in a specific mode, and realizing wide range input and output in another specific mode. Specifically, when voltage equalization cannot be achieved when connecting a series unbalanced load, the opposite-name ends and the same-name ends of different secondary windings on the same magnetic core are connected to the voltage-equalizing end of the secondary output unit to realize the series connection of different windings, thereby realizing voltage equalization of series loads; when a wide range of input and output is required, different secondary windings are connected in parallel, so as to power the load with a lower voltage, thereby realizing a wide range of input and output. In addition, the entire circuit is exquisitely designed, simple in structure, and does not require the addition of additional devices, so the cost is low and the application scenarios are wide. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] The present invention will be further described below with reference to the accompanying drawings and embodiments, in which:

[0039] Figure 1 is a circuit diagram of a full-bridge LLC resonant circuit of the prior art;

[0040] Figure 2 It is a principle block diagram of a preferred embodiment of a wide range input and output voltage equalizing resonant circuit of the present invention;

[0041] Figure 3 is a circuit diagram of a preferred embodiment of a wide range input and output voltage equalizing resonant circuit of the present invention;

[0042] Figure 4 yes Figure 3 The equivalent circuit diagram of the wide range input and output voltage equalizing resonant circuit in the first specific mode is shown;

[0043] Figure 5 yes Figure 3 The equivalent circuit diagram of the wide range input and output voltage equalizing resonant circuit in the second specific mode is shown;

[0044] Figure 6 is a circuit diagram of another preferred embodiment of the wide range input and output voltage equalizing resonant circuit of the present invention;

[0045] Figure 7 is a circuit diagram of another preferred embodiment of the wide range input and output voltage equalizing resonant circuit of the present invention;

[0046] Figure 8 It is a circuit diagram of another preferred embodiment of the wide range input and output voltage equalizing resonant circuit of the present invention. DETAILED DESCRIPTION

[0047] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0048] Figure 2 1 is a principle block diagram of a preferred embodiment of a wide range input and output voltage equalizing resonant circuit of the present invention. Figure 2 As shown, the wide range input-output voltage-balanced resonant circuit of the present invention includes a transformer module 200 and a primary input module 100 arranged on the primary side of the transformer module 200. Further, the transformer module 200 includes a primary winding N1, a secondary winding N2 and a secondary winding N3. The primary input module 100 is connected to the primary winding N1.

[0049] The wide range input-output voltage-sharing resonant circuit further includes a secondary-side rectifying unit 310 , a secondary-side rectifying unit 320 , a switch unit 410 , a switch unit 420 and a secondary-side output unit 30 . The same-name end of the secondary winding N2 is connected to the input end of the secondary rectifier unit 310, and the opposite-name end is connected to the equalizing end of the secondary output unit 30 or the input end of the secondary rectifier unit 320 via the switch unit 410; the same-name end of the secondary winding N3 is connected to the equalizing end of the secondary output unit 30 or the input end of the secondary rectifier unit 310 via the switch unit 420, and the opposite-name end is connected to the input end of the secondary rectifier unit 320; the first output end of the secondary rectifier unit 310 is connected to the first output end of the secondary rectifier unit 320 and the first end of the secondary output unit 30, and the second output end of the secondary rectifier unit 310 is connected to the second output end of the secondary rectifier unit 320 and the second end of the secondary output unit 30; the secondary winding N2 and the secondary winding N3 are the same winding.

[0050] The secondary output unit 30 includes a load R1 and a load R2 connected in series between the first end and the second end of the secondary output unit 30, and an output capacitor C1 and an output capacitor C2 connected in series between the first end and the second end of the secondary output unit 30; the connection point between the output capacitor C1 and the output capacitor C2 and the connection point between the load R1 and the load R2 are connected to each other as the voltage equalizing end of the secondary output unit 30.

[0051] When the load R1 and the load R2 are different loads and require voltage balancing, the switch unit 410 and the switch unit 420 are controlled to enter the first switching state, so that the secondary winding N2 and the secondary winding N3 are connected in series, so that the opposite-name end of the secondary winding N2 and the same-name end of the secondary winding N3 are simultaneously connected to the voltage balancing end of the secondary output unit 30 to balance the loads R1 and the load R2.

[0052] When a wide range of input and output is required, the switch unit 410 and the switch unit 420 are selected to enter the first switch state or the second switch state according to the input-output voltage relationship, so that the secondary winding N2 and the secondary winding N3 are respectively connected in series or in parallel to respectively supply power to the load R1 and the load R2 to achieve a wide range of input and output. According to the relationship between the input and output voltages, that is, according to the actual input voltage and the required output voltage, a high voltage output or a low voltage output is selected. When a high voltage output is required, the switch unit 410 and the switch unit 420 are selected to enter the first switch state, so that the secondary winding N2 and the secondary winding N3 are connected in series to provide a high voltage to the load R1 and the load R2. When a low voltage output is required, the switch unit 410 and the switch unit 420 are selected to enter the second switch state, so that the secondary winding N2 and the secondary winding N3 are connected in parallel to provide a low voltage to the load R1 and the load R2.

[0053] In a preferred embodiment of the present invention, the secondary rectifier unit 310 and the secondary rectifier unit 320 respectively include two rectifier devices connected in series, and the connection point of the two rectifier devices is the output end of the secondary rectifier unit; the rectifier device includes a diode, a MOSFET or an IGBT. The first switch unit and the second switch unit include any suitable switch device, such as a mechanical switch device or a semiconductor switch device; the mechanical switch device includes a relay or a contactor; the semiconductor switch device includes a MOSFET or an IGBT. The primary input module 100 may include any suitable switch tube full-bridge input module, switch tube half-bridge input module, three-phase LLC input module, all of which fall within the protection scope of the present invention.

[0054] In the preferred embodiment of the present invention, the wide range input and output generally refers to an input and output voltage range of 150-1000 V. Of course, those skilled in the art can also define the actual wide range input and output voltage according to actual needs.

[0055] The wide-range input-output voltage-equalizing resonant circuit of the present invention can work in different modes, thereby realizing voltage equalization of series loads in a specific mode, and realizing wide-range input and output in another specific mode. Specifically, when voltage equalization cannot be realized when connecting a series unbalanced load, the opposite-name ends and the same-name ends of different secondary windings on the same magnetic core are connected to the voltage-equalizing end of the secondary output unit to realize the series connection of different windings, thereby realizing voltage equalization of the series loads; when a wide-range input and output is required, different secondary windings are connected in parallel, so as to power the load with a lower voltage, thereby realizing a wide-range input and output.

[0056] Figure 3 1 is a circuit diagram of a preferred embodiment of the wide range input and output voltage equalization resonant circuit of the present invention. Figure 2-3 It can be seen that the wide range input and output voltage equalization resonant circuit of the present invention includes a transformer module 200 and a primary input module 100 arranged on the primary side of the transformer module 200. Further, the transformer module 200 includes a primary winding N1, a secondary winding N2 and a secondary winding N3. The primary input module 100 is connected to the primary winding N1.

[0057] The wide range input and output voltage equalization resonant circuit further includes a secondary side rectifying unit 310, a secondary side rectifying unit 320, a switch unit 410, a switch unit 420 and a secondary side output unit 30. Figure 3 As shown, the secondary rectifier unit 310 includes switch tubes Q1 and Q2 connected in series, and the secondary rectifier unit 320 includes switch tubes Q3 and Q4 connected in series. The secondary output unit 30 includes an output capacitor C1, an output capacitor C2, a load R1, and a load R2. The output capacitor C1 and the output capacitor C2 are connected in series between the first end and the second end of the secondary output unit 30, and the load R1 and the load R2 are also connected in series between the first end and the second end of the secondary output unit 30. The connection point between the output capacitor C1 and the output capacitor C2 and the connection point between the load R1 and the load R2 are connected to each other as the voltage equalizing end of the secondary output unit 30. The secondary rectifier unit 310 and the secondary rectifier unit 320 are respectively connected in parallel between the first end and the second end of the secondary output unit 30.

[0058] like Figure 3As shown, the same-name end of the secondary winding N2 is connected to the input end of the secondary rectifier unit 310 (i.e., the first end of the switch tube Q1 and the second end of the switch tube Q2), and the opposite-name end is connected to the voltage-equalizing end of the secondary output unit 30 or the input end of the secondary rectifier unit 320 (i.e., the first end of the switch tube Q3 and the second end of the switch tube Q4) through the switch unit 410. The same-name end of the secondary winding N3 is connected to the voltage-equalizing end of the secondary output unit 30 or the input end of the secondary rectifier unit 310 (i.e., the first end of the switch tube Q1 and the second end of the switch tube Q2) through the switch unit 420, and the opposite-name end is connected to the input end of the secondary rectifier unit 320 (i.e., the first end of the switch tube Q3 and the second end of the switch tube Q4). The first output end of the secondary rectifier unit 310 (i.e., the second end of the switch tube Q1) is connected to the first output end of the secondary rectifier unit 320 (i.e., the second end of the switch tube Q3) and the first end of the secondary output unit 30, and the second output end of the secondary rectifier unit 310 (i.e., the first end of the switch tube Q2) is connected to the second output end of the secondary rectifier unit 320 (i.e., the first end of the switch tube Q4) and the second end of the secondary output unit 30; the secondary winding N2 and the secondary winding N3 are the same winding. The switches Q1, Q2, Q3 and Q4 can be diodes, IGBTs or MOSFETs. When they are diodes, their first end is the anode and the second end is the cathode. When they are IGBTs or MOSFETs, as Figure 3 As shown, the first end is the source, the second end is the drain, and the gate receives a control signal.

[0059] Further Figure 3 As shown, the switch unit 410 includes a switch device K1, the moving contact 1 of the switch device K1 is connected to the opposite-name end of the secondary winding N2, the first static contact 2 is connected to the equalizing end of the secondary output unit 30, and the second static contact 3 is connected to the input end of the secondary rectifier unit 320; the switch unit 420 includes a switch device K2, the moving contact 1 of the switch device K2 is connected to the same-name end of the secondary winding N2, the first static contact 2 is connected to the equalizing end of the secondary output unit 30, and the second static contact 3 is connected to the input end of the secondary rectifier unit 310.

[0060] When the load R1 and the load 2 are different loads and require voltage balancing, the moving contact 1 of the switch device K1 is controlled to be conductive with its first static contact 2 and the moving contact 1 of the switch device K2 is controlled to be conductive with its first static contact 2, and the switch unit 410 and the switch unit 420 enter the first switching state. At this time, the wide range input and output voltage balancing resonant circuit is in the first specific mode, and its equivalent circuit is as follows: Figure 4 shown.

[0061] When a wide range of input and output is required, according to the input and output voltage relationship, the moving contact 1 of the switch device K1 is controlled to be connected to its first static contact 2 and the moving contact 1 of the switch device K2 is controlled to be connected to its first static contact 2 to obtain Figure 4 The equivalent circuit shown, or when the moving contact 1 of the switch device K1 is controlled to be connected to its second static contact 3 and the moving contact 1 of the switch device K2 is controlled to be connected to its second static contact 3, the switch unit 410 and the switch unit 420 enter the second switch state. That is, when a high voltage output is required, the moving contact 1 of the switch device K1 is controlled to be connected to its first static contact 2 and the moving contact 1 of the switch device K2 is controlled to be connected to its first static contact 2, and the secondary winding N2 and the secondary winding N3 are connected in series to output a high voltage to power the loads R1 and R2. When a low voltage output is required, the moving contact 1 of the switch device K1 is controlled to be connected to its second static contact 3 and the moving contact 1 of the switch device K2 is controlled to be connected to its second static contact 3. At this time, the wide range input and output voltage equalizing resonant circuit is in the second specific mode, and its equivalent circuit is as shown in FIG. Figure 5 As shown, at this time, the secondary winding N2 and the secondary winding N3 are connected in parallel to output a low voltage to power the loads R1 and R2. Since the output voltage can be doubled when two different selections are made, that is, the output voltage in the first specific mode is twice the output voltage in the second specific mode, a wide range of input and output can be achieved.

[0062] exist Figure 3 In the preferred embodiment shown, the wide range input and output voltage equalization resonant circuit is an interleaved parallel half-bridge rectifier resonant circuit. Figure 3 As shown, the primary input module 100 includes an input capacitor C4, a switch tube full bridge unit, a resonant capacitor C3 and a resonant inductor L1. The switch tube full bridge unit includes switch tubes Q5, Q6, Q7 and Q8. The first input end of the switch tube full bridge unit (i.e., the second end of the switch tube Q5 and the second end of the switch tube Q7) is connected to the first end of the input capacitor C4, the second input end (i.e., the first end of the switch tube Q6 and the first end of the switch tube Q8) is connected to the second end of the input capacitor C4, the first output end (i.e., the first end of the switch tube Q5 and the second end of the switch tube Q6) is connected to the same-name end of the primary winding N1 via the resonant inductor L1 and the resonant capacitor C3, and the second output end (i.e., the first end of the switch tube Q7 and the second end of the switch tube Q8) is connected to the opposite-name end of the primary winding N1. The switch tubes Q5, Q6, Q7 and Q8 can be IGBTs or MOSFETs. As shown Figure 3 As shown, the first end is the source, the second end is the drain, and the gate receives a control signal.

[0063] The switch devices K1 and K2 may include mechanical switch devices or semiconductor switch devices; the mechanical switch devices include relays or contactors; the semiconductor switch devices include MOSFETs or IGBTs. In other preferred embodiments of the present invention, the switch devices K1 and K2 may be replaced by more or fewer switch devices, such as single-pole double-throw switches, single-pole single-throw switches or double-pole double-throw switches, etc., as long as they can meet the aforementioned on and off processes.

[0064] Combine the following Figure 3-4 The principle of the wide range input and output voltage equalizing resonant circuit of the present invention is described as follows. Figure 3 As shown, the transformer module 200 includes a primary winding N1, a secondary winding N2 and a secondary winding N3, wherein the secondary winding N2 and the secondary winding N3 are the same windings, that is, the number of turns is the same. The moving contact 1 of the switch device K1 is connected to the opposite end of the secondary winding N2, the first static contact 2 is connected to the voltage-equalizing end of the secondary output unit 30, and the second static contact 3 is connected to the input end of the secondary rectifier unit 320; the moving contact 1 of the switch device K2 is connected to the same end of the secondary winding N2, the first static contact 2 is connected to the voltage-equalizing end of the secondary output unit 30, and the second static contact 3 is connected to the input end of the secondary rectifier unit 310.

[0065] In the first specific mode: when the load R1 and the load 2 are different loads and need voltage balancing, the moving contact 1 of the switch device K1 is controlled to be connected with its first static contact 2 and the moving contact 1 of the switch device K2 is controlled to be connected with its first static contact 2. At this time, the equivalent circuit is as follows: Figure 4 As shown, it is the secondary winding series mode. In one switching cycle: the voltage of the secondary winding N2 in the positive half cycle is equal to the voltage U1, and the voltage of the secondary winding N3 in the positive half cycle is equal to the voltage U2; the voltage of the secondary winding N2 in the negative half cycle is equal to the voltage U2, and the voltage of the secondary winding N3 in the negative half cycle is equal to the voltage U1. Since the secondary windings N2 and N3 are the same windings and are wound on a magnetic core, that is, the number of turns is the same, the winding voltages are equal, that is, U1=U2. Therefore, no matter what the relationship between the resistance values ​​of load R1 and load R2 is, U1=U2, achieving the effect of always equalizing the voltage when the circuit is working.

[0066] When a wide range of input and output is required, according to the input and output voltage relationship, the moving contact 1 of the switch device K1 is controlled to be connected to its first static contact 2 and the moving contact 1 of the switch device K2 is controlled to be connected to its first static contact 2 to obtain Figure 4 The equivalent circuit shown in FIG. 1 is a circuit diagram of a circuit diagram of a wide range input / output voltage-sharing resonant circuit. Alternatively, the moving contact 1 of the switch device K1 and its second static contact 3 are controlled to be conductive and the moving contact 1 of the switch device K2 and its second static contact 3 are controlled to be conductive. At this time, the wide range input / output voltage-sharing resonant circuit is in the second specific mode. The equivalent circuit is as shown in FIG. Figure 5 As shown, that is, the secondary winding parallel mode, the voltage of the secondary winding N2 and the secondary winding N3 is the entire output voltage. Since the output voltage can be doubled when two different selections are made, that is, the output voltage in the first specific mode is twice the second output voltage, a wide range of input and output can be achieved.

[0067] Under the same input conditions, the total output voltage of the wide-range input-output voltage-equalizing resonant circuit in the first specific mode is twice that in the second specific mode, that is, a 2-fold output gain change is achieved by switching the states of the switching devices K1 and K2, which is beneficial to the wide input and output voltage operation of the module; when the output is connected to an unbalanced load in series, it can be fixedly operated in the first specific mode; when a specific wide-range output input voltage is required (here it refers to 1 / 2 of the input and output voltage in the first specific mode), it can be fixedly operated in the second specific mode, so that different powers can be output at different voltage points, thereby achieving the purpose of being able to operate in the full voltage range.

[0068] The wide-range input-output voltage-equalizing resonant circuit of the present invention can work in different modes, thereby realizing voltage equalization of series loads in a specific mode, and realizing wide-range input and output in another specific mode. Specifically, when voltage equalization cannot be realized when connecting a series unbalanced load, the opposite-name ends and the same-name ends of different secondary windings on the same magnetic core are connected to the voltage-equalizing end of the secondary output unit to realize the series connection of different windings, thereby realizing voltage equalization of the series loads; when a wide-range input and output is required, different secondary windings are connected in parallel, so as to power the load with a lower voltage, thereby realizing a wide-range input and output.

[0069] Figure 6 It is a circuit diagram of another preferred embodiment of the wide range input and output voltage equalizing resonant circuit of the present invention. Figure 6 The embodiment shown and Figure 3 The embodiments shown are similar, except that Figure 6 The wide range input and output voltage equalization resonant circuit shown is a primary symmetrical half-bridge resonant circuit. Figure 6 As shown, the primary input module 100 includes an input capacitor C4, an input capacitor C5, a switch tube half-bridge unit and a resonant inductor L1. The switch tube half-bridge unit includes switch tubes Q5 and Q6. The first input end (i.e., the second end of the switch tube Q5) of the switch tube half-bridge unit is connected to the first end of the input capacitor C4, the second input end (i.e., the first end of the switch tube Q6) is connected to the second end of the input capacitor C5, and the output end (i.e., the first end of the switch tube Q5 and the second end of the switch tube Q6) is connected to the same-name end of the primary winding N1 through the resonant inductor L1, the second end of the input capacitor C4 is connected to the first end of the input capacitor C5, and the second end of the input capacitor C5 is connected to the opposite-name end of the primary winding N1.

[0070] Similarly, the switch tubes Q5 and Q6 may be IGBTs or MOSFETs. Figure 6 As shown, the first end is the source, the second end is the drain, and the gate receives a control signal. Figure 6 The rest of the structure and principle of the wide range input and output voltage equalization resonant circuit shown is the same as Figure 3 The structure and principle of the wide range input and output voltage equalizing resonant circuit shown are similar and will not be repeated here.

[0071] Figure 7 It is a circuit diagram of another preferred embodiment of the wide range input and output voltage equalizing resonant circuit of the present invention. Figure 7 The embodiment shown and Figure 3 The embodiments shown are similar, except that Figure 7 The wide range input and output voltage equalization resonant circuit shown is a primary side asymmetric half-bridge resonant circuit. Figure 7 As shown, the primary input module 100 includes an input capacitor C4, a switch tube half-bridge unit, a resonant capacitor C3 and a resonant inductor L1; the first input end of the switch tube half-bridge unit (i.e., the second end of the switch tube Q5) is connected to the first end of the input capacitor C4, the second input end (i.e., the first end of the switch tube Q6) is connected to the second end of the input capacitor C4, and the output end (i.e., the first end of the switch tube Q5 and the second end of the switch tube Q6) is connected to the same-name end of the primary winding N1 via the resonant inductor L1 and the resonant capacitor C3.

[0072] Similarly, the switch tubes Q5 and Q6 may be IGBTs or MOSFETs. Figure 7 As shown, the first end is the source, the second end is the drain, and the gate receives a control signal. Figure 7 The rest of the structure and principle of the wide range input and output voltage equalization resonant circuit shown is the same as Figure 3 The structure and principle of the wide range input and output voltage equalizing resonant circuit shown are similar and will not be repeated here.

[0073] Figure 8 FIG. 2 is a circuit diagram of another preferred embodiment of the wide range input and output voltage equalizing resonant circuit of the present invention. Figure 8 As shown, the wide range input and output voltage equalizing resonant circuit of the present invention includes a transformer module 200 and a primary input module 100 arranged on the primary side of the transformer module 200. Further, the transformer module 200 includes a primary winding N11, a primary winding N21, a primary winding N31, a secondary winding N12, a secondary winding N13, a secondary winding N22, a secondary winding N23, a secondary winding N32, and a secondary winding N33. The same-name ends of the primary winding N11, the primary winding N21, and the primary winding N31 are respectively connected to the primary input module 100, and the opposite-name ends are connected to each other.

[0074] The wide range input and output voltage-equalizing resonant circuit further includes a secondary rectifier unit 310, a secondary rectifier unit 320, a secondary rectifier unit 330, a secondary rectifier unit 340, a secondary rectifier unit 350, a secondary rectifier unit 360 and a secondary output unit. As mentioned above, each of the secondary rectifier units includes two switch tubes connected in series. Of course, other rectifier devices, such as diodes, MOSFETs, or IGBTs, can also be used. The secondary output unit 30 includes an output capacitor C1, an output capacitor C2, a load R1 and a load R2; the output capacitor C1 and the output capacitor C2 are connected in series at both ends of the secondary output unit, and the load R1 and the load R2 are also connected in series at both ends of the secondary output unit; the connection point of the output capacitor C1 and the output capacitor C2 and the connection point of the load R1 and the load R2 are connected to each other as the voltage-equalizing end of the secondary output unit. The secondary winding N12, the secondary winding N13, the secondary winding N22, the secondary winding N23, the secondary winding N32, and the secondary winding N33 are the same windings.

[0075] The like-name end of the secondary winding N12 is connected to the input end of the secondary rectifier unit 310 (i.e., the connection point of the two rectifier devices), and the unlike-name end is connected to the equalizing end of the secondary output unit 30 or the input end of the secondary rectifier unit 320 (i.e., the connection point of the two rectifier devices) via the first switch device K1; the like-name end of the secondary winding N13 is connected to the equalizing end of the secondary output unit 30 or the input end of the secondary rectifier unit 310 via the second switch device K2, and the unlike-name end is connected to the first input end of the secondary rectifier unit 320; the first output end of the secondary rectifier unit 310 is connected to the first output end of the secondary rectifier unit 320 and the first end of the secondary output unit 30, and the second output end of the secondary rectifier unit 310 is connected to the second output end of the secondary rectifier unit 320 and the second end of the secondary output unit 30.

[0076] Similarly, the same-name end of the secondary winding N22 is connected to the input end of the secondary rectifier unit 330 (i.e., the connection point of the two rectifier devices), and the opposite-name end is connected to the voltage-equalizing end of the secondary output unit 30 or the input end of the secondary rectifier unit 340 (i.e., the connection point of the two rectifier devices) through the third switch device K3; the same-name end of the secondary winding N23 is connected to the voltage-equalizing end of the secondary output unit 30 or the input end of the secondary rectifier unit 330 (i.e., the connection point of the two rectifier devices) through the fourth switch device K4, and the opposite-name end is connected to the input end of the secondary rectifier unit 340 (i.e., the connection point of the two rectifier devices); the first output end of the secondary rectifier unit 330 is connected to the first output end of the secondary rectifier unit 340 and the first end of the secondary output unit 30, and the second output end of the secondary rectifier unit 330 is connected to the second output end of the secondary rectifier unit 340 and the second end of the secondary output unit 30;

[0077] The like-name end of the secondary winding N32 is connected to the input end of the secondary rectifier unit 350 (i.e., the connection point of the two rectifier devices), and the unlike-name end is connected to the equalizing end of the secondary output unit 30 or the input end of the secondary rectifier unit 360 (i.e., the connection point of the two rectifier devices) through the fifth switch device K5; the like-name end of the secondary winding N33 is connected to the equalizing end of the secondary output unit 30 or the input end of the secondary rectifier unit 350 (i.e., the connection point of the two rectifier devices) through the sixth switch device K6, and the unlike-name end is connected to the input end of the secondary rectifier unit 360 (i.e., the connection point of the two rectifier devices); the first output end of the secondary rectifier unit 350 is connected to the first output end of the secondary rectifier unit 360 and the first end of the secondary output unit 30, and the second output end of the secondary rectifier unit 350 is connected to the second output end of the secondary rectifier unit 360 and the second end of the secondary output unit 30.

[0078] When the load R1 and the load R2 are different loads and require voltage balancing, the first switch device K1, the second switch device K2, the third switch device K3, the fourth switch device K4, the fifth switch device K5 and the sixth switch device K6 are controlled to enter the first switching state, so that the secondary winding N12, the secondary winding N13, the secondary winding N22, the secondary winding N23, the secondary winding N32 and the secondary winding N33 are connected in series; therefore, the opposite-name end of the secondary winding N12, the same-name end of the secondary winding N13, the opposite-name end of the secondary winding N22, the same-name end of the secondary winding N23, the opposite-name end of the secondary winding N32 and the same-name end of the secondary winding N33 are simultaneously connected to the voltage balancing end of the secondary output unit 30 to balance the loads R1 and R2; its principle is the same as Figure 3The embodiments shown are similar and will not be described again here.

[0079] When wide-range input and output are required, the first switch device K1, the second switch device K2, the third switch device K3, the fourth switch device K4, the fifth switch device K5 and the sixth switch device K6 are controlled to enter the first switch state or the second switch state according to the input-output voltage relationship, so that the secondary winding N12, the secondary winding N13, the secondary winding N22, the secondary winding N23, the secondary winding N32 and the secondary winding N33 are respectively connected in series or in parallel to provide different voltages to the load R1 and the load R2 respectively to achieve wide-range input and output. The specific principle is as follows: Figure 3 The illustrated embodiments will not be described again here.

[0080] Further Figure 8 As shown, the moving contact of the first switch device K1 is connected to the opposite-name end of the secondary winding N12, the first static contact is connected to the voltage-equalizing end of the secondary output unit 30, and the second static contact is connected to the input end of the secondary rectifier unit 320; the moving contact of the second switch device K2 is connected to the same-name end of the secondary winding N13, the first static contact is connected to the voltage-equalizing end of the secondary output unit 30, and the second static contact is connected to the input end of the secondary rectifier unit 310; the moving contact of the third switch device K3 is connected to the opposite-name end of the secondary winding N22, the first static contact is connected to the voltage-equalizing end of the secondary output unit 30, and the second static contact is connected to the input end of the secondary rectifier unit 340. end; the moving contact of the fourth switch device K4 is connected to the same-name end of the secondary winding N23, the first static contact is connected to the voltage-equalizing end of the secondary output unit 30, and the second static contact is connected to the input end of the secondary rectifier unit 330; the moving contact of the fifth switch device K5 is connected to the opposite-name end of the secondary winding N32, the first static contact is connected to the voltage-equalizing end of the secondary output unit 30, and the second static contact is connected to the input end of the secondary rectifier unit 360; the moving contact of the sixth switch device K6 is connected to the same-name end of the secondary winding N33, the first static contact is connected to the voltage-equalizing end of the secondary output unit 30, and the second static contact is connected to the input end of the secondary rectifier unit 350;

[0081] When the moving contact of the first switch device K1 is connected to its first static contact, the moving contact of the second switch device K2 is connected to its first static contact, the moving contact of the third switch device K3 is connected to its first static contact, the moving contact of the fourth switch device K4 is connected to its first static contact, the moving contact of the fifth switch device K5 is connected to its first static contact, and the moving contact of the sixth switch device K6 is connected to its first static contact, the first switch device K1, the second switch device K2, the third switch device K3, the fourth switch device K4, the fifth switch device K5 and the sixth switch device K6 enter the first switching state;

[0082] When the moving contact of the first switch device K1 is connected to its second static contact, the moving contact of the second switch device K2 is connected to its second static contact, the moving contact of the third switch device K3 is connected to its second static contact, the moving contact of the fourth switch device K4 is connected to its second static contact, the moving contact of the fifth switch device K5 is connected to its second static contact, and the moving contact of the sixth switch device K6 is connected to its second static contact, the first switch device K1, the second switch device K2, the third switch device K3, the fourth switch device K4, the fifth switch device K5 and the sixth switch device K6 enter the second switching state.

[0083] Further Figure 8 As shown, the primary input module 100 includes an input capacitor C4, a switch tube three-phase full-bridge unit, a first resonant capacitor C13, a first resonant inductor L11, a second resonant capacitor C23, a second resonant inductor L12, a third resonant capacitor C33 and a third resonant inductor L13; the first input end of the switch tube three-phase full-bridge unit is connected to the first end of the input capacitor C4, the second input end is connected to the second end of the input capacitor C4, the first output end is connected to the same-name end of the primary winding N11 via the first resonant inductor L11 and the first resonant capacitor C13, the second output end is connected to the same-name end of the primary winding N21 via the second resonant inductor L12 and the second resonant capacitor C23, and the third output end is connected to the same-name end of the primary winding N31 via the third resonant inductor L13 and the third resonant capacitor C33.

[0084] The switch tube three-phase full-bridge unit includes six switch tubes, and the connection relationship is as follows: Figure 8 Similarly, the switch tube may be an IGBT or a MOSFET. Figure 8 The rest of the structure and principle of the wide range input and output voltage equalization resonant circuit shown is the same as Figure 3 The structure and principle of the wide range input and output voltage equalizing resonant circuit shown are similar and will not be repeated here.

[0085] The wide range input and output voltage-equalizing resonant circuit of the present invention can work in different modes, thereby realizing voltage equalization of series loads in a specific mode, and realizing wide range input and output in another specific mode. Specifically, when voltage equalization cannot be achieved when connecting a series unbalanced load, the opposite-name ends and the same-name ends of different secondary windings on the same magnetic core are connected to the voltage-equalizing end of the secondary output unit to realize the series connection of different windings, thereby realizing voltage equalization of series loads; when a wide range of input and output is required, different secondary windings are connected in parallel, so as to power the load with a lower voltage, thereby realizing a wide range of input and output. In addition, the entire circuit is exquisitely designed, simple in structure, and does not require the addition of additional devices, so the cost is low and the application scenarios are wide.

[0086] Although the present invention is described by specific embodiments, it should be understood by those skilled in the art that various changes and equivalent substitutions may be made to the present invention without departing from the scope of the present invention. In addition, various modifications may be made to the present invention for specific situations or materials without departing from the scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed, but should include all implementation methods falling within the scope of the claims of the present invention.

[0087] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A wide range input and output voltage-equalizing resonant circuit, comprising a transformer module and a primary input module arranged on the primary side of the transformer module, characterized in that: The transformer module includes a primary winding, a first secondary winding and a second secondary winding; the primary input module is connected to the primary winding; The wide range input-output voltage-balanced resonant circuit further comprises a first secondary-side rectifying unit, a second secondary-side rectifying unit, a first switch unit, a second switch unit and a secondary-side output unit; The same-name end of the first secondary winding is connected to the input end of the first secondary rectifier unit, and the opposite-name end is connected to the voltage-equalizing end of the secondary output unit or the input end of the second secondary rectifier unit via the first switch unit; the same-name end of the second secondary winding is connected to the voltage-equalizing end of the secondary output unit or the input end of the first secondary rectifier unit via the second switch unit, and the opposite-name end is connected to the input end of the second secondary rectifier unit; the first output end of the first secondary rectifier unit is connected to the first output end of the second secondary rectifier unit and the first end of the secondary output unit, and the second output end of the first secondary rectifier unit is connected to the second output end of the second secondary rectifier unit and the second end of the secondary output unit; the first secondary winding and the second secondary winding are the same winding; The secondary output unit includes a first load and a second load connected in series between a first end and a second end of the secondary output unit, and a first output capacitor and a second output capacitor connected in series between the first end and the second end of the secondary output unit; a connection point between the first output capacitor and the second output capacitor and a connection point between the first load and the second load are connected to each other as the voltage balancing end of the secondary output unit; When the first load and the second load are different loads and need voltage balancing, the first switch unit and the second switch unit are controlled to enter a first switch state, so that the first secondary winding and the second secondary winding are connected in series, so that the opposite-name end of the first secondary winding and the same-name end of the second secondary winding are simultaneously connected to the voltage balancing end of the secondary output unit to balance the first load and the second load; When a wide range of input and output is required, the first switch unit and the second switch unit are selected to enter the first switch state or the second switch state according to the relationship between the input and output voltages, so that the first secondary winding and the second secondary winding are respectively connected in series or in parallel to provide different output voltages for the first load and the second load respectively to achieve a wide range of input and output; The first switch unit comprises a first switch device, a moving contact of the first switch device is connected to the opposite-name end of the first secondary winding, a first static contact is connected to the voltage-sharing end of the secondary output unit, and a second static contact is connected to the input end of the second secondary rectifier unit; The second switch unit comprises a second switch device, a moving contact of the second switch device is connected to the same-name end of the second secondary winding, a first static contact is connected to the voltage-sharing end of the secondary output unit, and a second static contact is connected to the input end of the first secondary rectifier unit; When the moving contact of the first switch device is connected to its first static contact and the moving contact of the second switch device is connected to its first static contact, the first switch unit and the second switch unit enter a first switch state; When the moving contact of the first switching device is conductively connected to its second static contact and the moving contact of the second switching device is conductively connected to its second static contact, the first switching unit and the second switching unit enter a second switching state.

2. The wide range input and output voltage equalizing resonant circuit according to claim 1, characterized in that: The first switching device and the second switching device include mechanical switching devices or semiconductor switching devices; the mechanical switching device includes a relay or a contactor; the semiconductor switching device includes a MOSFET or an IGBT.

3. The wide range input and output voltage equalizing resonant circuit according to claim 2, characterized in that: The first secondary rectifier unit and the second secondary rectifier unit respectively include two rectifier devices connected in series, and the connection point of the two rectifier devices is the input end of the secondary rectifier unit; the rectifier device includes a diode, a MOSFET or an IGBT.

4. The wide range input and output voltage equalizing resonant circuit according to any one of claims 1 to 3, characterized in that: The primary input module includes an input capacitor, a switch tube full-bridge unit, a resonant capacitor and a resonant inductor; the first input end of the switch tube full-bridge unit is connected to the first end of the input capacitor, the second input end is connected to the second end of the input capacitor, the first output end is connected to the same-name end of the primary winding via the resonant inductor and the resonant capacitor, and the second output end is connected to the opposite-name end of the primary winding.

5. The wide range input and output voltage equalizing resonant circuit according to any one of claims 1 to 3, characterized in that: The primary input module includes a first input capacitor, a second input capacitor, a switch tube half-bridge unit and a resonant inductor; the first input end of the switch tube half-bridge unit is connected to the first end of the first input capacitor, the second input end is connected to the second end of the second input capacitor, the output end is connected to the same-name end of the primary winding through the resonant inductor, and the second end of the first input capacitor is connected to the first end of the second input capacitor and the opposite-name end of the primary winding.

6. The wide range input and output voltage equalizing resonant circuit according to any one of claims 1 to 3, characterized in that: The primary input module includes an input capacitor, a switch tube half-bridge unit, a resonant capacitor and a resonant inductor; the first input end of the switch tube half-bridge unit is connected to the first end of the input capacitor, the second input end is connected to the second end of the input capacitor and the opposite end of the primary winding, and the output end is connected to the same end of the primary winding via the resonant inductor and the resonant capacitor.

7. A wide range input and output voltage-equalizing resonant circuit, comprising a transformer module and a primary input module arranged on the primary side of the transformer module, characterized in that: The transformer module comprises a first primary winding, a second primary winding, a third primary winding, a first secondary winding, a second secondary winding, a third secondary winding, a fourth secondary winding, a fifth secondary winding, and a sixth secondary winding; The same-named ends of the first primary winding, the second primary winding and the third primary winding are respectively connected to the primary input module, and the opposite-named ends are connected to each other; The wide range input-output voltage-balanced resonant circuit further comprises a first secondary-side rectifying unit, a second secondary-side rectifying unit, a third secondary-side rectifying unit, a fourth secondary-side rectifying unit, a fifth secondary-side rectifying unit, a sixth secondary-side rectifying unit, a first switch unit, a second switch unit, a third switch unit, a fourth switch unit, a fifth switch unit, a sixth switch unit and a secondary-side output unit; The same-name end of the first secondary winding is connected to the input end of the first secondary rectifier unit, and the opposite-name end is connected to the voltage-equalizing end of the secondary output unit or the input end of the second secondary rectifier unit via the first switch unit; the same-name end of the second secondary winding is connected to the voltage-equalizing end of the secondary output unit or the input end of the first secondary rectifier unit via the second switch unit, and the opposite-name end is connected to the input end of the second secondary rectifier unit; the first output end of the first secondary rectifier unit is connected to the first output end of the second secondary rectifier unit and the first end of the secondary output unit, and the second output end of the first secondary rectifier unit is connected to the second output end of the second secondary rectifier unit and the second end of the secondary output unit; The same-name end of the third secondary winding is connected to the input end of the third secondary rectifier unit, and the opposite-name end is connected to the voltage-equalizing end of the secondary output unit or the input end of the fourth secondary rectifier unit via the third switch unit; the same-name end of the fourth secondary winding is connected to the voltage-equalizing end of the secondary output unit or the input end of the third secondary rectifier unit via the fourth switch unit, and the opposite-name end is connected to the input end of the fourth secondary rectifier unit; the first output end of the third secondary rectifier unit is connected to the first output end of the fourth secondary rectifier unit and the first end of the secondary output unit, and the second output end of the third secondary rectifier unit is connected to the second output end of the fourth secondary rectifier unit and the second end of the secondary output unit; The same-name end of the fifth secondary winding is connected to the input end of the fifth secondary rectifier unit, and the opposite-name end is connected to the voltage-equalizing end of the secondary output unit or the input end of the sixth secondary rectifier unit via the fifth switch unit; the same-name end of the sixth secondary winding is connected to the voltage-equalizing end of the secondary output unit or the input end of the fifth secondary rectifier unit via the sixth switch unit, and the opposite-name end is connected to the input end of the sixth secondary rectifier unit; the first output end of the fifth secondary rectifier unit is connected to the first output end of the sixth secondary rectifier unit and the first end of the secondary output unit, and the second output end of the fifth secondary rectifier unit is connected to the second output end of the sixth secondary rectifier unit and the second end of the secondary output unit; the first secondary winding, the second secondary winding, the third secondary winding, the fourth secondary winding, the fifth secondary winding and the sixth secondary winding are the same winding; The secondary output unit includes a first load and a second load connected in series between a first end and a second end of the secondary output unit, and a first output capacitor and a second output capacitor connected in series between the first end and the second end of the secondary output unit; a connection point between the first output capacitor and the second output capacitor and a connection point between the first load and the second load are connected to each other as the voltage balancing end of the secondary output unit; When the first load and the second load are different loads and need voltage balancing, the first switch unit, the second switch unit, the third switch unit, the fourth switch unit, the fifth switch unit and the sixth switch unit are controlled to enter the first switch state, so that the first secondary winding, the second secondary winding, the third secondary winding, the fourth secondary winding, the fifth secondary winding and the sixth secondary winding are connected in series; therefore, the opposite-name end of the first secondary winding, the same-name end of the second secondary winding, the opposite-name end of the third secondary winding, the same-name end of the fourth secondary winding, the opposite-name end of the fifth secondary winding and the same-name end of the sixth secondary winding are simultaneously connected to the voltage balancing end of the secondary output unit to balance the first load and the second load; When wide-range input and output are required, the first switch unit, the second switch unit, the third switch unit, the fourth switch unit, the fifth switch unit and the sixth switch unit are selected to enter the first switch state or the second switch state according to the relationship between the input and output voltages, so that the first secondary winding, the second secondary winding, the third secondary winding, the fourth secondary winding, the fifth secondary winding and the sixth secondary winding are respectively connected in series or in parallel to provide different output voltages for the first load and the second load respectively to achieve wide-range input and output; The first switch unit comprises a first switch device, a moving contact of the first switch device is connected to the opposite-name end of the first secondary winding, a first static contact is connected to the voltage-sharing end of the secondary output unit, and a second static contact is connected to the input end of the second secondary rectifier unit; The second switch unit comprises a second switch device, a moving contact of the second switch device is connected to the same-name end of the second secondary winding, a first static contact is connected to the voltage-sharing end of the secondary output unit, and a second static contact is connected to the input end of the first secondary rectifier unit; The third switch unit comprises a third switch device, wherein a moving contact of the third switch device is connected to the opposite-name end of the third secondary winding, a first static contact is connected to the voltage-sharing end of the secondary output unit, and a second static contact is connected to the input end of the fourth secondary rectifier unit; The fourth switch unit comprises a fourth switch device, a moving contact of the fourth switch device is connected to the same-name end of the fourth secondary winding, a first static contact is connected to the voltage-sharing end of the secondary output unit, and a second static contact is connected to the input end of the third secondary rectifier unit; The fifth switch unit comprises a fifth switch device, wherein a moving contact of the fifth switch device is connected to the opposite-name end of the fifth secondary winding, a first static contact is connected to the voltage-sharing end of the secondary output unit, and a second static contact is connected to the input end of the sixth secondary rectifier unit; The sixth switch unit comprises a sixth switch device, a moving contact of the sixth switch device is connected to the same-name end of the sixth secondary winding, a first static contact is connected to the voltage-sharing end of the secondary output unit, and a second static contact is connected to the input end of the fifth secondary rectifier unit; When the moving contact of the first switch device is connected to its first static contact, the moving contact of the second switch device is connected to its first static contact, the moving contact of the third switch device is connected to its first static contact, the moving contact of the fourth switch device is connected to its first static contact, the moving contact of the fifth switch device is connected to its first static contact, and the moving contact of the sixth switch device is connected to its first static contact, the first switch unit, the second switch unit, the third switch unit, the fourth switch unit, the fifth switch unit, and the sixth switch unit enter the first switch state; When the moving contact of the first switching device is connected to its second static contact, the moving contact of the second switching device is connected to its second static contact, the moving contact of the third switching device is connected to its second static contact, the moving contact of the fourth switching device is connected to its second static contact, the moving contact of the fifth switching device is connected to its second static contact, and the moving contact of the sixth switching device is connected to its second static contact, the first switching unit, the second switching unit, the third switching unit, the fourth switching unit, the fifth switching unit and the sixth switching unit enter the second switching state.

8. The wide range input and output voltage equalizing resonant circuit according to claim 7, characterized in that: The first switching device, the second switching device, the third switching device, the fourth switching device, the fifth switching device and the sixth switching device include mechanical switching devices or semiconductor switching devices; the mechanical switching device includes a relay or a contactor; the semiconductor switching device includes a MOSFET or an IGBT.

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