A wide range output power module

Abstract

The utility model provides a wide range output's power module, including first DC / DC module, second DC / DC module, mode switching module and control module, the mode switching module includes the first switching unit of setting in the input side of first DC / DC module, the second switching unit of setting in the input side of second DC / DC module, the third switching unit and fourth switching unit between the output side of first DC / DC module and second DC / DC module, the control module is used for controlling first switching unit, second switching unit, third switching unit and fourth switching unit switching to control the wide range output's power module respectively work in first voltage output mode, second voltage output mode, third voltage output mode and fourth voltage output mode, the utility model discloses can realize high -efficient reliable wide range output.

Description

Technical Field

[0001] This utility model relates to the field of power modules, and more specifically, to a power module with a wide output range. Background Technology

[0002] With the increasing demand for high-voltage, high-power applications in electric vehicles and energy storage systems, power modules need to cover a wide output voltage range. To meet this wide output range, existing power modules typically achieve this by connecting the secondary output voltages of multiple DC / DC modules in series or parallel. However, to cover an ultra-wide range of 150V-1000V, a large number of DC / DC modules are usually required in series and parallel connections, resulting in insufficient reliability and low efficiency. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a high-efficiency and reliable power module under a wide range of output conditions, in view of the above-mentioned defects of the prior art.

[0004] The technical solution adopted by this utility model to solve its technical problem is: to construct a power supply module with a wide output range, including a first DC / DC module, a second DC / DC module, a mode switching module and a control module; The mode switching module includes a first switching unit disposed on the input side of the first DC / DC module, a second switching unit disposed on the input side of the second DC / DC module, a third switching unit disposed between the output sides of the first DC / DC module and the second DC / DC module, and a fourth switching unit. The control module is used to control the first switching unit, the second switching unit, the third switching unit and the fourth switching unit to switch the power supply module with wide-range output to operate in the first voltage output mode, the second voltage output mode, the third voltage output mode and the fourth voltage output mode respectively.

[0005] In the wide-range output power module of this utility model, the first DC / DC module includes a first transformer, a first primary input unit connected to the primary side of the first transformer, and a first secondary output unit connected to the secondary side of the first transformer. The first transformer includes a first primary winding and a second primary winding, which are connected in series. The first switching unit includes a first relay; the control coil of the first relay receives a first control signal from the control module; the moving contact of the first relay is connected to the first output terminal of the first primary input unit; the first stationary contact is connected to the second terminal of the first primary winding and the first terminal of the second primary winding; the second stationary contact is connected to the first terminal of the first primary winding; the second output terminal of the first primary input unit is connected to the second terminal of the second primary winding; and the second terminal of the first primary winding is connected to the first terminal of the second primary winding. The moving contact of the first relay is connected to either the first stationary contact or the second stationary contact based on the first control signal.

[0006] In the wide-range output power module of this utility model, the second DC / DC module includes a second transformer, a second primary input unit connected to the primary side of the second transformer, and a second secondary output unit connected to the secondary side of the second transformer. The second transformer includes a third primary winding and a fourth primary winding, which are connected in series. The second switching unit includes a second relay; the control coil of the second relay receives a second control signal from the control module; the moving contact of the second relay is connected to the first output terminal of the second primary input unit, the first stationary contact is connected to the second terminal of the third primary winding and the first terminal of the fourth primary winding, the second stationary contact is connected to the first terminal of the third primary winding, the second output terminal of the second primary input unit is connected to the second terminal of the fourth primary winding, and the second terminal of the third primary winding is connected to the first terminal of the fourth primary winding. The moving contact of the second relay is connected to either the first stationary contact or the second stationary contact based on the second control signal.

[0007] In the wide-range output power module of this utility model, the third switching unit includes a third relay, and the control coil of the third relay receives the third control signal from the control module. The first stationary contact of the third relay is connected to the first output terminal of the first secondary output unit, the second stationary contact is connected to the second output terminal of the first secondary output unit, and the moving contact is connected to the first output terminal of the second secondary output unit. The moving contact of the third relay is connected to either the first stationary contact or the second stationary contact based on the third control signal.

[0008] In the wide-range output power module of this utility model, the fourth switching unit includes a fourth relay, and the control coil of the fourth relay receives the fourth control signal from the control module. The first stationary contact of the fourth relay is connected to the second output terminal of the first secondary output unit, the second stationary contact is left unused, and the moving contact is connected to the first and second output terminals of the second secondary output unit. The moving contact of the fourth relay is connected to either the first stationary contact or the second stationary contact based on the fourth control signal.

[0009] In the wide-range output power module of this utility model, the turns ratio of the first primary winding to the second primary winding is 1:2.

[0010] In the wide-range output power module of this utility model, the first primary winding includes 8 turns, and the second primary winding includes 16 turns; in the first voltage output mode and the third output mode, the total number of windings of the first transformer is 16 turns; in the second voltage output mode and the fourth output mode, the total number of windings of the first transformer is 24 turns.

[0011] In the wide-range output power module of this utility model, the first primary-side input unit includes a first switching transistor rectifier bridge and a first LC resonant unit; The moving contact of the first relay is connected to the first output terminal of the first switching transistor rectifier bridge via the first LC resonant unit, and the second end of the second primary winding is connected to the second output terminal of the first switching transistor rectifier bridge; the first input terminal of the first switching transistor rectifier bridge is connected to the positive terminal of the DC bus, and the second input terminal of the first switching transistor rectifier bridge is connected to the negative terminal of the DC bus.

[0012] In the wide-range output power module of this utility model, the second primary-side input unit includes a second switching transistor rectifier bridge and a second LC resonant unit. The moving contact of the second relay is connected to the first output terminal of the second switching transistor rectifier bridge via the second LC resonant unit, and the second end of the fourth primary winding is connected to the second output terminal of the second switching transistor rectifier bridge; the first input terminal of the second switching transistor rectifier bridge is connected to the positive terminal of the DC bus, and the second input terminal of the second switching transistor rectifier bridge is connected to the negative terminal of the DC bus.

[0013] In the wide-range output power module of this utility model, the first transformer includes a first secondary winding and a second secondary winding; the first secondary winding and the second secondary winding are connected in series. The first secondary output unit includes a first output diode, a second output diode, and a first output capacitor; the anode of the first output diode is connected to the first end of the first secondary winding, and the cathode is connected to the cathode of the second output diode, the first end of the first output capacitor, and the first output terminal of the first secondary output unit; the anode of the second output diode is connected to the second end of the second secondary winding, and the second end of the first secondary winding is connected to the first end of the second secondary winding, the second end of the first output capacitor, and the second output terminal of the first secondary output unit.

[0014] In the wide-range output power module of this utility model, the second transformer includes a third secondary winding and a fourth secondary winding; the third secondary winding and the fourth secondary winding are connected in series; The second secondary output unit includes a third output diode, a fourth output diode, and a second output capacitor; the anode of the third output diode is connected to the first end of the third secondary winding, and the cathode is connected to the cathode of the fourth output diode, the first end of the second output capacitor, and the first output terminal of the second secondary output unit; the anode of the fourth output diode is connected to the second end of the fourth secondary winding, and the second end of the third secondary winding is connected to the first end of the fourth secondary winding, the second end of the second output capacitor, and the second output terminal of the second secondary output unit.

[0015] The wide-range output power module of this invention has a first switching unit on the input side of the first DC / DC module, a second switching unit on the input side of the second DC / DC module, and a third and fourth switching units between the output sides of the first and second DC / DC modules. Therefore, by simply controlling the first, second, third, and fourth switching units with a control module, the wide-range output power module can be controlled to operate in the first voltage output mode, the second voltage output mode, the third voltage output mode, and the fourth voltage output mode, respectively, thus achieving efficient and reliable wide-range output. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments. In the accompanying drawings: Figure 1 This is a schematic block diagram of the first preferred embodiment of the wide-range output power module of this utility model; Figure 2 This is a schematic block diagram of a second preferred embodiment of the wide-range output power module of this utility model; Figure 3This is a circuit diagram of a preferred embodiment of the DC / DC module of the wide-range output power supply module of this utility model. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0018] Figure 1 This is a schematic block diagram of a first preferred embodiment of the wide-range output power module of this utility model. (See diagram for example.) Figure 1 As shown, the wide-range output power module of this utility model includes a DC / DC module 100, a DC / DC module 200, a mode switching module, and a control module 400. The mode switching module includes a switching unit 310 disposed on the input side of the DC / DC module 100, a switching unit 320 disposed on the input side of the DC / DC module 200, and switching units 330 and 340 disposed between the output sides of the DC / DC module 100 and the DC / DC module 200. The control module 400 controls the switching units 310, 320, 330, and 340 to switch the wide-range output power module to operate in a first voltage output mode, a second voltage output mode, a third voltage output mode, and a fourth voltage output mode, respectively.

[0019] In a preferred embodiment of this utility model, the DC / DC module 100 and the DC / DC module 200 can be any known DC / DC module or circuit in the art; the switching unit 310, the switching unit 320, the switching unit 330 and the switching unit 340 can be any known relay structure in the art; and the control module 400 is preferably a digital signal processor.

[0020] The wide-range output power module of this invention has a first switching unit on the input side of the first DC / DC module, a second switching unit on the input side of the second DC / DC module, and a third and fourth switching units between the output sides of the first and second DC / DC modules. Therefore, by simply controlling the first, second, third, and fourth switching units with a control module, the wide-range output power module can be controlled to operate in the first voltage output mode, the second voltage output mode, the third voltage output mode, and the fourth voltage output mode, respectively, thus achieving efficient and reliable wide-range output.

[0021] Figure 2 This is a schematic block diagram of a second preferred embodiment of the wide-range output power module of this utility model. Figure 3 This is a circuit diagram of a preferred embodiment of the DC / DC module of the wide-range output power supply module of this utility model. The following will be combined with... Figures 2-3 A preferred embodiment of the wide-range output power module of this utility model is described below. It should be noted that... Figure 2 The DC / DC module 100 and DC / DC module 200 in the middle can respectively adopt Figure 3 The circuit structure shown is shown.

[0022] Combination Figures 1-3 As can be seen, the wide-range output power module of this utility model includes a DC / DC module 100, a DC / DC module 200, a mode switching module, and a control module 400. The mode switching module includes a switching unit 310 disposed on the input side of the DC / DC module 100, a switching unit 320 disposed on the input side of the DC / DC module 200, and switching units 330 and 340 disposed between the output sides of the DC / DC module 100 and the DC / DC module 200. The control module 400 is used to control the switching units 310, 320, 330, and 340 to switch the wide-range output power module to operate in a first voltage output mode, a second voltage output mode, a third voltage output mode, and a fourth voltage output mode, respectively.

[0023] Furthermore, such as Figures 2-3As shown, the DC / DC module 100 includes a transformer T, a first primary-side input unit connected to the primary side of the transformer T, and a first secondary-side output unit connected to the secondary side of the transformer T. The transformer T includes primary windings T11 and T12, secondary windings T21 and T22, with primary windings T11 and T12 connected in series, and secondary windings T21 and T22 connected in series. The first primary-side input unit includes a first switching transistor rectifier bridge and a first LC resonant unit. The first switching transistor rectifier bridge includes switching transistors Q1-Q4, diodes D1-D4, and capacitors C1-C4, wherein diodes D1-D4 and capacitors C1-C4 are connected in parallel between the source and drain of switching transistors Q1-Q4, and the gates of switching transistors Q1-Q4 receive control signals. The control process of switching transistors Q1-Q4 can be described with reference to any known switching transistor rectifier bridge in the art. The first LC resonant unit includes a resonant capacitor Lr and a resonant inductor Cr connected in series. The first secondary output unit includes an output diode D5, an output diode D6, and an output capacitor Co; the anode of the output diode D5 is connected to the first terminal of the secondary winding T21, the cathode is connected to the cathode of the output diode D6, the first terminal of the output capacitor Co, and the first output terminal A of the first secondary output unit; the anode of the output diode D6 is connected to the second terminal of the secondary winding T22, and the second terminal of the secondary winding T21 is connected to the first terminal of the secondary winding T22, the second terminal of the output capacitor Co, and the second output terminal B of the first secondary output unit. Of course, in other preferred embodiments of this utility model, the first switching rectifier bridge, the first LC resonant unit, and the first secondary output unit can also be constructed using any other circuits or modules known in the art.

[0024] like Figures 2-3 As shown, the switching unit 310 includes a relay K3; the control coil of the relay K3 receives a first control signal from the control module 400; the moving contact 3 of the relay K3 is connected to the first output terminal of the first primary input unit (i.e., the second terminal of the resonant inductor Cr, the first terminal of the resonant inductor Cr being connected to the connection point of switching transistors Q1 and Q2 via the resonant capacitor); the stationary contact 6 is connected to the second terminal of the primary winding T11 and the first terminal of the primary winding T12; the stationary contact 4 is connected to the first terminal of the primary winding T11; the second output terminal of the first primary input unit (i.e., the second output terminal of the first switching transistor rectifier bridge formed by the connection point of switching transistors Q3 and Q4) is connected to the second terminal of the primary winding T12; the second terminal of the primary winding T11 is connected to the first terminal of the primary winding T11; the moving contact 3 of the relay K3 is connected to the stationary contact 6 or the stationary contact 4 based on the first control signal. That is, as... Figure 3As shown, the moving contact 3 of the relay K3 is connected to the first output terminal of the first switching transistor rectifier bridge (i.e., the connection point of switching transistors Q1 and Q2) via the first LC resonant unit. The second end of the primary winding T12 is connected to the second output terminal of the first switching transistor rectifier bridge (i.e., the connection point of switching transistors Q3 and Q4). The first input terminal of the first switching transistor rectifier bridge (i.e., the connection point of switching transistors Q1 and Q3) is connected to the positive terminal of the DC bus, and the second input terminal of the first switching transistor rectifier bridge (i.e., the connection point of switching transistors Q2 and Q4) is connected to the negative terminal of the DC bus, thereby receiving the input voltage Vin.

[0025] Furthermore, such as Figures 2-3 As shown, the structure of the DC / DC module 200 is the same as that of the DC / DC module 100. The DC / DC module 200 includes a transformer T, a second primary-side input unit connected to the primary side of the transformer T, and a second secondary-side output unit connected to the secondary side of the transformer T. The transformer T includes a primary winding T11, a primary winding T12, a secondary winding T21, and a secondary winding T22. The primary windings T11 and T12 are connected in series, and the secondary windings T21 and T22 are connected in series. The second primary-side input unit includes a second switching transistor rectifier bridge and a second LC resonant unit. Similarly, the second switching transistor rectifier bridge includes switching transistors Q1~Q4, diodes D1~D4, and capacitors C1~C4. The diodes D1~D4 and capacitors C1~C4 are connected in parallel between the source and drain of the switching transistors Q1~Q4, respectively, and the gates of the switching transistors Q1~Q4 receive control signals. Here, the control process of switching transistors Q1~Q4 can refer to any known switching transistor rectifier bridge in the art. The second LC resonant unit includes a resonant capacitor Lr and a resonant inductor Cr connected in series. The second secondary output unit includes an output diode D5, an output diode D6, and an output capacitor Co; the anode of the output diode D5 is connected to the first terminal of the secondary winding T21, the cathode is connected to the cathode of the output diode D6, the first terminal of the output capacitor Co, and the first output terminal A of the second secondary output unit; the anode of the output diode D6 is connected to the second terminal of the secondary winding T22, and the second terminal of the secondary winding T21 is connected to the first terminal of the secondary winding T22, the second terminal of the output capacitor Co, and the second output terminal B of the second secondary output unit. Of course, in other preferred embodiments of this utility model, the second switching transistor rectifier bridge, the second LC resonant unit, and the second secondary output unit can also be constructed using any other circuits or modules known in the art.

[0026] like Figures 2-3As shown, similarly, the switching unit 320 includes a relay K3; the control coil of the relay K3 receives the second control signal from the control module 400; the moving contact 3 of the relay K3 is connected to the first output terminal of the second primary input unit (i.e., the second terminal of the resonant inductor Cr, the first terminal of the resonant inductor Cr being connected to the connection point of switching transistors Q1 and Q2 via the resonant capacitor), the stationary contact 6 is connected to the second terminal of the primary winding T11 and the first terminal of the primary winding T12, the stationary contact 4 is connected to the first terminal of the primary winding T11, the second output terminal of the second primary input unit (i.e., the second output terminal of the second switching transistor rectifier bridge formed by the connection point of switching transistors Q3 and Q4) is connected to the second terminal of the primary winding T12, and the second terminal of the primary winding T11 is connected to the first terminal of the primary winding T12. The moving contact 3 of the relay K3 is connected to the stationary contact 6 or the stationary contact 4 based on the second control signal. That is, as shown... Figure 3 As shown, the moving contact 3 of the relay K3 is connected to the first output terminal of the second switching rectifier bridge (i.e., the connection point of switching transistors Q1 and Q2) via the second LC resonant unit. The second end of the primary winding T12 is connected to the second output terminal of the second switching rectifier bridge (i.e., the connection point of switching transistors Q3 and Q4). The first input terminal of the second switching rectifier bridge (i.e., the connection point of switching transistors Q1 and Q3) is connected to the positive terminal of the DC bus, and the second input terminal of the second switching rectifier bridge (i.e., the connection point of switching transistors Q2 and Q4) is connected to the negative terminal of the DC bus, thereby receiving the input voltage Vin.

[0027] like Figures 2-3 As shown, the switching unit 330 includes a relay K1, the control coil of which receives a third control signal from the control module 400; the stationary contact 6 of the relay K1 is connected to the first output terminal of the first secondary output unit. Figure 3 A or Figure 2 A1), stationary contact 4 is connected to the second output terminal of the first secondary output unit ( Figure 3 B or Figure 2 In B1), the moving contact 3 is connected to the first output terminal of the second secondary output unit ( Figure 3 A or Figure 2 (A2 in the original text); the moving contact 3 of the relay K1 is connected to the stationary contact 6 or the stationary contact 4 based on the third control signal.

[0028] like Figures 2-3 As shown, the switching unit 340 includes a relay K2, the control coil of which receives the fourth control signal from the control module 400; the stationary contact 6 of the relay K2 is connected to the second output terminal of the first secondary output unit. Figure 3 B or Figure 2 B1), stationary contact 4 is left unused, and moving contact 3 is connected to the first output terminal of the second secondary output unit. Figure 3 A or Figure 2 A2 in the middle) and the second output terminal ( Figure 3 B or Figure 2 (B2 in the text); the moving contact 3 of the relay K2 is connected to the stationary contact 6 or the stationary contact 4 based on the fourth control signal.

[0029] It should be noted that, Figure 3 In this context, capacitor Co1 corresponds to the output capacitor Co of the first secondary output unit, capacitor Co2 corresponds to the output capacitor Co of the second secondary output unit, output terminal A1 corresponds to the first output terminal A of the first secondary output unit, output terminal A2 corresponds to the first output terminal A of the second secondary output unit, output terminal B1 corresponds to the second output terminal B of the first secondary output unit, and output terminal B2 corresponds to the second output terminal B of the second secondary output unit.

[0030] In a preferred embodiment of this invention, the turns ratio of the primary winding T11 to the primary winding T12 is 1:2. In other preferred embodiments of this invention, the turns ratio of the primary winding T11 to the primary winding T12 can also be 1:1, or other ratios. The resonance effect is best when the turns ratio of the primary winding T11 to the primary winding T12 is selected as 1:2.

[0031] The following will combine Figures 1-3 The preferred embodiment shown illustrates the principle and operation of the wide-range output power module of this invention. This invention reconfigures the connection method of the transformer primary winding and adjusts the equivalent turns ratio according to the set voltage to optimize gain characteristics and soft-switching conditions, enabling the power module to operate in four different voltage output modes with higher efficiency. Furthermore, by setting a switching unit in the transformer primary winding for switching, electromagnetic interference (EMI) and voltage stress risks can be avoided; efficiency is improved through a limited number of winding switches, and it is compatible with existing frequency conversion / phase modulation control strategies, significantly reducing system complexity and hardware costs, providing a highly reliable and efficient solution for wide-range high-voltage power modules.

[0032] In a preferred embodiment of this utility model, two relays K1 and K2 are respectively set on the secondary side of the transformers of different DC / DC modules. When relay K1 is closed and relay K2 is open, the output capacitors Co1 and Co2 of DC / DC module 100 and DC / DC module 200 are connected in series, and the output of the power supply module is in high-voltage mode, for example, when the set output voltage is greater than or equal to 500V, it operates in this mode. When relay K1 is open and relay K2 is closed, the output capacitors Co1 and Co2 of DC / DC module 100 and DC / DC module 200 are connected in parallel, and the output of the power supply module is in low-voltage mode, when the set voltage is less than 500V, it operates in this mode.

[0033] Meanwhile, the primary winding switching function of the transformers of different DC / DC modules is controlled by the control signal issued by the control module 400. The relay K3 is set on the primary winding of the transformers of different DC / DC modules. It is divided into low-gain primary transformer turns (24 turns) and high-gain primary transformer turns (16 turns). In high and low voltage modes, it can be divided into two modes: 24 turns and 16 turns. The 24-turn mode operates in the lower voltage range, and the 16-turn mode operates in the higher voltage range. This can make the LLC operating frequency lower, thereby improving the working efficiency of the power supply module.

[0034] Therefore, the power module has four voltage output modes: the first voltage output mode (also known as the low voltage 24-turn mode (150V~375V)); the second voltage output mode (also known as the low voltage 16-turn mode (375V~500V)); the third voltage output mode (also known as the high voltage 24-turn mode (500V~750V)); and the fourth voltage output mode (also known as the high voltage 16-turn mode (750V~1000V)). These four operating states cover the full voltage range (150V~1000V) of the power module.

[0035] The switching of relay K3 on the primary winding side of DC / DC module 100 and DC / DC module 200, and relays K1 and K2 on the secondary winding side of DC / DC module 100 and DC / DC module 200, is determined by control module 400 (e.g., DSP). When the power module is powered on, the controller determines which of the four operating states it is currently in based on the set voltage. If the state and set voltage do not match, the controller controls the relays to switch to the corresponding state. After the controller detects that the relay switching is correct, it powers on and controls the power module's voltage output to the set voltage. When the power module is running, if the set voltage changes, the controller determines whether a mode switch is needed based on the new set voltage and the current operating state. If no switch is needed, the output voltage is adjusted to the set voltage. If a switch is needed, the power is first powered off, and then the relays are controlled to switch to the corresponding state. After the controller detects that the relay switching is correct, it powers on and controls the power module's voltage output to the set voltage. Those skilled in the art can use any method known in the art to perform the aforementioned settings and switching. In a preferred embodiment of this invention, the number of turns of the primary winding of the LLC is changed according to the set voltage, and its gain is adjusted to maintain the matching between the switching frequency and the resonant frequency. This allows the LLC to operate near the resonant frequency in each voltage range (i.e., the aforementioned first voltage output mode, second voltage output mode, third voltage output mode, and fourth voltage output mode), which effectively reduces its switching losses, improves efficiency, and reduces the heat generation of the heating element.

[0036] like Figures 2-3 As shown, the wide-range output power module of this utility model includes a DC / DC module 100 and a DC / DC module 200, both of which are two-phase LLC. They are controlled by relay K3, which controls the number of turns in the primary transformer winding. When the moving contact 3 of relay K3 is connected to the stationary contact 4, the transformer T has 24 turns, which is a low-gain transformer winding. When the moving contact 3 of relay K3 is connected to the stationary contact 6, the transformer winding has 16 turns, which is a high-gain transformer winding.

[0037] When the moving contact 3 of relays K1 and K2 is connected to the stationary contact 6, the output capacitors Co1 and Co2 of DC / DC module 100 and DC / DC module 200 are connected in parallel, and the power supply module outputs in low-voltage mode. When the moving contact 3 of relays K1 and K2 is connected to the stationary contact 4, the output capacitors Co1 and Co2 of DC / DC module 100 and DC / DC module 200 are connected in series, and the power supply module outputs in high-voltage mode.

[0038] Based on the above, when the moving contacts 3 of relays K1 and K2 are connected to the stationary contact 6, and the moving contacts 3 of relays K3 of DC / DC module 100 and DC / DC module 200 are both connected to the stationary contact 6, the charging module is in low-voltage 16-turn mode (375V~500V). When the moving contacts 3 of relays K1 and K2 are connected to the stationary contact 6, and the moving contacts 3 of relays K3 in both DC / DC modules 100 and 200 are connected to the stationary contact 4, the charging module operates in a low-voltage 24-turn mode (150V~375V). When the moving contacts 3 of relays K1 and K2 are connected to the stationary contact 4, and the moving contacts 3 of relays K3 in both DC / DC modules 100 and 200 are connected to the stationary contact 6, the charging module operates in a high-voltage 16-turn mode (750V~1000V). When the moving contacts 3 of relays K1 and K2 are connected to the stationary contact 4, and the moving contacts 3 of relays K3 in both DC / DC modules 100 and 200 are connected to the stationary contact 4, the charging module operates in a high-voltage 24-turn mode (500V~750V). Therefore, the charging module can efficiently and reliably achieve a wide voltage output range of 150V~1000V.

[0039] Although this utility model has been described through specific embodiments, those skilled in the art should understand that various modifications and equivalent substitutions can be made to this utility model without departing from its scope. Furthermore, various modifications can be made to this utility model for specific situations or materials without departing from its scope. Therefore, this utility model is not limited to the specific embodiments disclosed, but should include all embodiments falling within the scope of the claims of this utility model.

[0040] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A power supply module with a wide output range, characterized in that, It includes a first DC / DC module, a second DC / DC module, a mode switching module, and a control module; The mode switching module includes a first switching unit disposed on the input side of the first DC / DC module, a second switching unit disposed on the input side of the second DC / DC module, a third switching unit disposed between the output sides of the first DC / DC module and the second DC / DC module, and a fourth switching unit. The control module is used to control the first switching unit, the second switching unit, the third switching unit and the fourth switching unit to switch the power supply module with wide-range output to operate in the first voltage output mode, the second voltage output mode, the third voltage output mode and the fourth voltage output mode respectively.

2. The power supply module with wide-range output according to claim 1, characterized in that, The first DC / DC module includes a first transformer, a first primary input unit connected to the primary side of the first transformer, and a first secondary output unit connected to the secondary side of the first transformer. The first transformer includes a first primary winding and a second primary winding, which are connected in series. The first switching unit includes a first relay; the control coil of the first relay receives a first control signal from the control module; the moving contact of the first relay is connected to the first output terminal of the first primary input unit; the first stationary contact is connected to the second terminal of the first primary winding and the first terminal of the second primary winding; the second stationary contact is connected to the first terminal of the first primary winding; the second output terminal of the first primary input unit is connected to the second terminal of the second primary winding; and the second terminal of the first primary winding is connected to the first terminal of the second primary winding. The moving contact of the first relay is connected to either the first stationary contact or the second stationary contact based on the first control signal.

3. The power supply module with wide-range output according to claim 2, characterized in that, The second DC / DC module includes a second transformer, a second primary input unit connected to the primary side of the second transformer, and a second secondary output unit connected to the secondary side of the second transformer; The second transformer includes a third primary winding and a fourth primary winding, which are connected in series. The second switching unit includes a second relay; the control coil of the second relay receives a second control signal from the control module; the moving contact of the second relay is connected to the first output terminal of the second primary input unit, the first stationary contact is connected to the second terminal of the third primary winding and the first terminal of the fourth primary winding, the second stationary contact is connected to the first terminal of the third primary winding, the second output terminal of the second primary input unit is connected to the second terminal of the fourth primary winding, and the second terminal of the third primary winding is connected to the first terminal of the fourth primary winding. The moving contact of the second relay is connected to either the first stationary contact or the second stationary contact based on the second control signal.

4. The power supply module with wide-range output according to claim 3, characterized in that, The third switching unit includes a third relay, and the control coil of the third relay receives a third control signal from the control module; The first stationary contact of the third relay is connected to the first output terminal of the first secondary output unit, the second stationary contact is connected to the second output terminal of the first secondary output unit, and the moving contact is connected to the first output terminal of the second secondary output unit. The moving contact of the third relay is connected to either the first stationary contact or the second stationary contact based on the third control signal.

5. The power supply module with wide-range output according to claim 3, characterized in that, The fourth switching unit includes a fourth relay, and the control coil of the fourth relay receives the fourth control signal from the control module. The first stationary contact of the fourth relay is connected to the second output terminal of the first secondary output unit, the second stationary contact is left unused, and the moving contact is connected to the first and second output terminals of the second secondary output unit. The moving contact of the fourth relay is connected to either the first stationary contact or the second stationary contact based on the fourth control signal.

6. The power supply module with wide-range output according to any one of claims 2 to 5, characterized in that, The turns ratio of the first primary winding to the second primary winding is 1:

2.

7. The power supply module with wide-range output according to claim 6, characterized in that, The first primary winding includes 8 turns, and the second primary winding includes 16 turns. In both the first voltage output mode and the third voltage output mode, the total number of primary windings of the first transformer is 16 turns. In the second voltage output mode and the fourth voltage output mode, the total number of primary windings of the first transformer is 24 turns.

8. The power supply module with wide-range output according to any one of claims 2 to 5, characterized in that, The first primary-side input unit includes a first switching rectifier bridge and a first LC resonant unit; The moving contact of the first relay is connected to the first output terminal of the first switching transistor rectifier bridge via the first LC resonant unit, and the second end of the second primary winding is connected to the second output terminal of the first switching transistor rectifier bridge; the first input terminal of the first switching transistor rectifier bridge is connected to the positive terminal of the DC bus, and the second input terminal of the first switching transistor rectifier bridge is connected to the negative terminal of the DC bus.

9. The power supply module with wide-range output according to any one of claims 3 to 5, characterized in that, The second primary-side input unit includes a second switching rectifier bridge and a second LC resonant unit; The moving contact of the second relay is connected to the first output terminal of the second switching transistor rectifier bridge via the second LC resonant unit, and the second end of the fourth primary winding is connected to the second output terminal of the second switching transistor rectifier bridge; the first input terminal of the second switching transistor rectifier bridge is connected to the positive terminal of the DC bus, and the second input terminal of the second switching transistor rectifier bridge is connected to the negative terminal of the DC bus.

10. The power supply module with wide-range output according to any one of claims 3 to 5, characterized in that, The first transformer includes a first secondary winding and a second secondary winding; the first secondary winding and the second secondary winding are connected in series; The first secondary output unit includes a first output diode, a second output diode, and a first output capacitor; the anode of the first output diode is connected to the first end of the first secondary winding, and the cathode is connected to the cathode of the second output diode, the first end of the first output capacitor, and the first output terminal of the first secondary output unit; the anode of the second output diode is connected to the second end of the second secondary winding, and the second end of the first secondary winding is connected to the first end of the second secondary winding, the second end of the first output capacitor, and the second output terminal of the first secondary output unit; The second transformer includes a third secondary winding and a fourth secondary winding; the third secondary winding and the fourth secondary winding are connected in series. The second secondary output unit includes a third output diode, a fourth output diode, and a second output capacitor; the anode of the third output diode is connected to the first end of the third secondary winding, and the cathode is connected to the cathode of the fourth output diode, the first end of the second output capacitor, and the first output terminal of the second secondary output unit; the anode of the fourth output diode is connected to the second end of the fourth secondary winding, and the second end of the third secondary winding is connected to the first end of the fourth secondary winding, the second end of the second output capacitor, and the second output terminal of the second secondary output unit.

Images