Power supply system applied to monorail train and monorail train

Abstract

The utility model discloses a power supply system applied to a monorail train and the monorail train, and belongs to the technical field of railway vehicles, and the power supply system comprises a DC / DC high-frequency chopping module which is used for converting a ground power supply voltage into a first preset DC voltage through a high-frequency DC / DC converter and a high-frequency transformer; the DC / AC inversion module is connected with the DC / DC high-frequency chopping module and is used for converting the first preset direct-current voltage into preset alternating-current voltage and supplying power to a medium-voltage load in the monorail train by using the preset alternating-current voltage; and the charger module is connected with the DC / AC inverter module, and is used for converting the first preset DC voltage into a second preset DC voltage through the phase-shifted full-bridge circuit, and supplying power to a low-voltage load in the monorail train by using the second preset DC voltage. Through the power supply system, the space occupation amount of the monorail train can be obviously reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of rail vehicles, and in particular to a power supply system applied to a monorail train and the monorail train. Background Art

[0002] In the prior art, a power frequency transformer is usually used to convert the ground power supply voltage, and the converted power supply voltage is used to provide a power source for the loads in the monorail train. However, due to the large size of the power frequency transformer, when the power frequency transformer is used to supply power to the monorail train, it needs to occupy a large amount of space on the monorail train. At present, there is no more effective solution to this technical problem. Utility Model Content

[0003] In view of this, the purpose of the utility model is to provide a power supply system and a monorail train for use in a monorail train, so as to solve the problem in the prior art that the power frequency transformer needs to occupy a large amount of space on the monorail train when supplying power to the monorail train. The specific scheme is as follows:

[0004] In order to solve the above technical problems, the utility model provides a power supply system applied to a monorail train, comprising:

[0005] A DC / DC high-frequency chopping module, used for converting a ground power supply voltage into a first preset DC voltage through a high-frequency DC / DC converter and a high-frequency transformer;

[0006] A DC / AC inverter module, connected to the DC / DC high-frequency chopper module, configured to convert the first preset DC voltage into a preset AC voltage, and use the preset AC voltage to power the medium voltage load in the monorail train;

[0007] A charger module is connected to the DC / AC inverter module, and is used to convert the first preset DC voltage into a second preset DC voltage through a phase-shifted full-bridge circuit, and use the second preset DC voltage to power the low-voltage load in the monorail train.

[0008] Preferably, the DC / DC high-frequency chopping module includes: a first voltage sensor, a first current sensor, a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, a fifth capacitor, a sixth capacitor, a seventh capacitor, a first resistor, a second resistor, a first switch tube, a second switch tube and the high-frequency transformer;

[0009] Wherein, the positive input end of the ground power supply is respectively connected to the first end of the first voltage sensor, the first end of the first capacitor, the first end of the second capacitor, the first end of the third capacitor, the first end of the second resistor, the first end of the seventh capacitor and the first end of the first switch tube, the negative input end of the ground power supply is respectively connected to the second end of the first voltage sensor, the second end of the first capacitor, the second end of the fourth capacitor, the second end of the fifth capacitor, the second end of the sixth capacitor, the second end of the seventh capacitor and the second end of the second switch tube, the first end and the second end of the first resistor are respectively connected to the first end and the second end of the first capacitor, the second end of the second resistor is connected to the first end of the sixth capacitor, the second end of the second capacitor is respectively connected to the first end of the fourth capacitor, the second end of the third capacitor, the first end of the fifth capacitor and the first end of the first current sensor, the second end of the first switch tube is respectively connected to the first end of the primary winding of the high-frequency transformer and the first end of the second switch tube, and the second end of the primary winding of the high-frequency transformer is connected to the second end of the first current sensor;

[0010] Correspondingly, the control end of the first switch tube and the control end of the second switch tube are used to receive a control signal sent by a target control chip.

[0011] Preferably, the DC / AC inverter module includes: a first diode, a second diode, a third diode, a fourth diode, a fifth diode, a sixth diode, a seventh diode, an eighth diode, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a first inductor, a second inductor, a third inductor, a fourth inductor, a second voltage sensor, a third voltage sensor, a fourth voltage sensor, a fifth voltage sensor, an eighth capacitor, a ninth capacitor, a tenth capacitor, an eleventh capacitor, a twelfth capacitor, a thirteenth capacitor, a third switch tube, a fourth switch tube, a fifth switch tube, a sixth switch tube, a seventh switch tube, an eighth switch tube, a ninth switch tube, a tenth switch tube, a second current sensor, a third current sensor, a fourth current sensor, a first contactor, a second contactor and a third contactor;

[0012] Wherein, the first end of the first winding of the secondary side of the high-frequency transformer is respectively connected to the positive electrode of the first diode and the negative electrode of the second diode, the second end of the first winding of the secondary side of the high-frequency transformer is respectively connected to the positive electrode of the fifth diode and the negative electrode of the sixth diode, and the negative electrode of the first diode is respectively connected to the negative electrode of the fifth diode, the first end of the third resistor, the first end of the first inductor, the first end of the second voltage sensor, the first end of the tenth capacitor, the first end of the third switch tube, the first end of the fifth switch tube, the first end of the seventh switch tube and the first end of the ninth switch tube;

[0013] The first end of the second winding of the secondary side of the high-frequency transformer is respectively connected to the anode of the third diode and the cathode of the fourth diode, the second end of the second winding of the secondary side of the high-frequency transformer is respectively connected to the anode of the seventh diode and the cathode of the eighth diode, the anode of the fourth diode is respectively connected to the anode of the eighth diode, the second end of the ninth capacitor, the second end of the second voltage sensor, the second end of the tenth capacitor, the second end of the fourth switch, the second end of the sixth resistor, the second end of the sixth switch tube, the second end of the eighth switch tube and the second end of the tenth switch tube;

[0014] The anode of the second diode is respectively connected to the cathode of the third diode, the anode of the sixth diode and the cathode of the seventh diode, the second end of the third resistor is connected to the first end of the eighth capacitor, the second end of the eighth capacitor is respectively connected to the cathode of the seventh diode and the first end of the fourth resistor, and the second end of the fourth resistor is connected to the first end of the ninth capacitor; the first end and the second end of the fifth resistor are respectively connected to the first end and the second end of the tenth capacitor, the second end of the third switch tube is respectively connected to the first end of the second current sensor and the first end of the fourth switch tube, the second end of the second current sensor is connected to the first end of the sixth resistor, the second end of the fifth switch tube is connected to the first end of the sixth switch tube, the second end of the seventh switch tube is connected to the first end of the eighth switch tube, and the second end of the ninth switch tube is connected to the first end of the tenth switch tube;

[0015] The second end of the fifth switch tube is connected to the first end of the third current sensor, the second end of the third current sensor is connected to the first end of the second inductor, the second end of the second inductor is connected to the first end of the twelfth capacitor, the second end of the seventh switch tube is connected to the first end of the third inductor, the second end of the third inductor is connected to the first end of the eleventh capacitor, the second end of the ninth switch tube is connected to the first end of the fourth current sensor, the second end of the fourth current sensor is connected to the first end of the fourth inductor, the second end of the fourth inductor is connected to the first end of the thirteenth capacitor, and the second end of the eleventh capacitor is respectively connected to the second end of the twelfth capacitor and the second end of the thirteenth capacitor;

[0016] The second end of the second inductor is connected to the first end of the third voltage sensor and the first end of the first contactor respectively, the second end of the third inductor is connected to the first end of the second contactor, the second end of the fourth inductor is connected to the first end of the third contactor, the second end of the second contactor is connected to the first end of the fourth voltage sensor, the second end of the third contactor is connected to the first end of the fifth voltage sensor, and the second end of the third voltage sensor, the second end of the fourth voltage sensor and the second end of the fifth voltage sensor are all connected to the second end of the eleventh capacitor;

[0017] Correspondingly, the control end of the third switch tube, the control end of the fourth switch tube, the control end of the fifth switch tube, the control end of the sixth switch tube, the control end of the seventh switch tube, the control end of the eighth switch tube, the control end of the ninth switch tube and the control end of the tenth switch tube are all used to receive the control signal sent by the target control chip.

[0018] Preferably, it also includes: a first EMI filter and a first filter capacitor board;

[0019] Wherein, the first end, the second end and the third end of the first EMI filter are respectively connected to the second end of the first contactor, the second end of the second contactor and the second end of the third contactor, the first end, the second end and the third end of the first filter capacitor board are respectively connected to the second end of the first contactor, the second end of the second contactor and the second end of the third contactor, the fourth end, the fifth end and the sixth end of the first EMI filter are respectively connected to the fourth end, the fifth end and the sixth end of the first filter capacitor board, the seventh end of the first EMI filter is grounded, and the seventh end and the eighth end of the first filter capacitor board are respectively connected to the second end of the eleventh capacitor;

[0020] Correspondingly, the fourth end, the fifth end and the sixth end of the first EMI filter are respectively the U end, the V end and the W end of the three-phase electricity, and the second end of the eleventh capacitor is the neutral end of the three-phase electricity.

[0021] Preferably, the charger module includes: an eleventh switch tube, a twelfth switch tube, a thirteenth switch tube, a fourteenth switch tube, a transformer, a fourteenth capacitor, a fifteenth capacitor, a sixteenth capacitor, a fifth current sensor, a sixth current sensor, a seventh current sensor, a seventh resistor, an eighth resistor, a ninth diode, a tenth diode, an eleventh diode, a fifth inductor, a first fuse, a sixth voltage sensor, a second EMI filter, and a second filter capacitor board;

[0022] Wherein, the second end of the first inductor is respectively connected to the first end of the eleventh switch tube and the first end of the thirteenth switch tube, the second end of the second voltage sensor is respectively connected to the second end of the twelfth switch tube and the second end of the fourteenth switch tube, the second end of the eleventh switch tube is respectively connected to the first end of the twelfth switch and the first end of the fifth current sensor, the second end of the fifth current sensor is connected to the first end of the primary winding of the transformer, the second end of the thirteenth switch tube is respectively connected to the first end of the fourteenth switch tube and the first end of the fourteenth capacitor, and the second end of the fourteenth capacitor is connected to the second end of the primary winding of the transformer;

[0023] The first end of the secondary winding of the transformer is respectively connected to the first end of the seventh resistor and the positive electrode of the ninth diode, the second end of the secondary winding of the transformer is respectively connected to the positive electrode of the tenth diode and the first end of the eighth resistor, the second end of the seventh resistor is respectively connected to the first end of the fifteenth capacitor, the second end of the eighth resistor is connected to the first end of the sixteenth capacitor, the first end of the fifth inductor is respectively connected to the second end of the fifteenth capacitor, the negative electrode of the ninth diode, the negative electrode of the tenth diode and the second end of the sixteenth capacitor, the second end of the fifth inductor is respectively connected to the first end of the second EMI filter and the first end of the second filter capacitor plate, the tap of the secondary winding of the transformer is respectively connected to the second end of the second filter capacitor plate and the second end of the second EMI filter, the third end of the second EMI filter is respectively connected to the first end of the first fuse and the first end of the sixth voltage sensor, the second end of the first fuse is connected to the first end of the sixth current sensor, the second end of the sixth current sensor is respectively connected to the positive electrode of the eleventh diode and the first end of the seventh current sensor, the second end of the sixth voltage sensor is connected to the fourth end of the second EMI filter, and the fifth end of the second EMI filter is grounded;

[0024] Correspondingly, the voltage between the cathode of the eleventh diode and the fourth end of the second EMI filter is the second preset DC voltage.

[0025] Preferably, it also includes:

[0026] The pre-charging module is connected to the DC / DC high-frequency chopping module and is used for performing current limiting processing on the ground power supply voltage.

[0027] Preferably, the pre-charging module comprises: a magnetic ring, a second fuse, a seventh voltage sensor, a fourth contactor, a fifth contactor, a ninth resistor, a sixth inductor, a seventeenth capacitor and an eighth current sensor;

[0028] Wherein, the first end of the magnetic ring is respectively connected to the positive input end of the ground power supply and the first end of the second fuse, the second end of the second fuse is respectively connected to the first end of the seventh voltage sensor, the first end of the fourth contactor and the first end of the fifth contactor, the second end of the seventh voltage sensor is connected to the negative input end of the ground power supply, the second end of the fifth contactor is connected to the first end of the ninth resistor, the second end of the ninth resistor is respectively connected to the second end of the fourth contactor and the first end of the sixth inductor, and the second end of the sixth inductor is connected to the first end of the eighth current sensor;

[0029] Correspondingly, the second end of the eighth current sensor is connected to the first end of the first voltage sensor.

[0030] Preferably, it also includes:

[0031] The heat dissipation fan module is connected to the DC / DC high-frequency chopper module, the DC / AC inverter module and the charger module, and is used to dissipate heat for the DC / DC high-frequency chopper module, the DC / AC inverter module and the charger module.

[0032] Preferably, a wave-shaped filter is provided at the air inlet of the heat dissipation fan module.

[0033] In order to solve the above technical problems, the utility model also provides a monorail train, including a power supply system applied to the monorail train as disclosed above.

[0034] Beneficial effects: It can be seen that in the power supply system for monorail trains provided by the utility model, a DC / DC high-frequency chopper module, a DC / AC inverter module and a charger module are provided, wherein the DC / DC high-frequency chopper module converts the ground power supply voltage into a first preset DC voltage through a high-frequency DC / DC converter and a high-frequency transformer, and then the DC / AC inverter module converts the first preset DC voltage into a preset AC voltage to power the medium-voltage load in the monorail train; at the same time, the charger module also converts the first preset DC voltage into a second preset DC voltage to power the low-voltage load in the monorail train. Compared with the prior art, in the utility model, the ground power supply voltage is mainly converted by high-frequency conversion technology, and the load on the monorail train is powered. Under the premise of outputting the same power, because the magnetic core of the high-frequency transformer is smaller and the number of turns of the coil wound on it is less, the power supply system provided by the utility model can significantly reduce the space occupied by the monorail train. Correspondingly, a monorail train provided by the utility model also has the above-mentioned beneficial effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0036] Figure 1 A structural diagram of a power supply system applied to a monorail train provided by an embodiment of the utility model;

[0037] Figure 2 It is a schematic diagram of the principle of the power frequency transformer when converting the target input voltage;

[0038] Figure 3 It is a schematic diagram of the principle of a high frequency transformer when converting a target input voltage;

[0039] Figure 4 A structural diagram of another power supply system applied to a monorail train provided by an embodiment of the utility model;

[0040] Figure 5 The simulation diagram of the case where the capacitance of the three-phase filter capacitor is set to 3×80uF and a 1kW single-phase load on a monorail train is supplied with power;

[0041] Figure 6 The simulation diagram of the case where the capacitance of the three-phase filter capacitor is changed to 3×350uF and a 1kW single-phase load on a monorail train is powered;

[0042] Figure 7 The simulation diagram of the case where the capacitance of the three-phase filter capacitor is changed to 3×350uF and a 0.8kW single-phase load on a monorail train is powered;

[0043] Figure 8 The simulation diagram of the case where the capacitance of the three-phase filter capacitor is changed to 3×350uF and two groups of 0.8kW single-phase loads are connected to the monorail train for power supply;

[0044] Fig. 9 A structural diagram of a heat dissipation fan module provided in an embodiment of the utility model. DETAILED DESCRIPTION

[0045] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0046] See also Figure 1 , Figure 1 The present invention provides a power supply system for a monorail train, the power supply system comprising:

[0047] A DC / DC high-frequency chopping module 10, used to convert the ground power supply voltage into a first preset DC voltage through a high-frequency DC / DC converter and a high-frequency transformer;

[0048] A DC / AC inverter module 20, connected to the DC / DC high-frequency chopper module, is used to convert a first preset DC voltage into a preset AC voltage, and use the preset AC voltage to power a medium-voltage load in the monorail train;

[0049] The charger module 30 is connected to the DC / AC inverter module, and is used to convert the first preset DC voltage into a second preset DC voltage through a phase-shifted full-bridge circuit, and use the second preset DC voltage to power the low-voltage load in the monorail train.

[0050] In this embodiment, a power supply system for a monorail train is provided, which can significantly reduce the space occupied by the monorail train. The power supply system is provided with a DC / DC high-frequency chopper module 10, a DC / AC inverter module 20 and a charger module 30.

[0051] Among them, the DC / DC high-frequency chopper module 10 will convert the ground power supply voltage into a first preset DC voltage through a high-frequency DC / DC converter and a high-frequency transformer, the DC / AC inverter module 20 will convert the first preset DC voltage into a preset AC voltage, and use the preset AC voltage to power the medium-voltage load in the monorail train, and the charger module 30 will convert the first preset DC voltage into a second preset DC voltage through a phase-shifted full-bridge circuit, and use the second preset DC voltage to power the low-voltage load in the monorail train.

[0052] In order to enable those skilled in the art to better understand the implementation principle of the present invention, a brief introduction to the power frequency transformer and the high frequency transformer is first given. Figure 2 , Figure 2The schematic diagram is a principle diagram of the power frequency transformer when converting the target input voltage. It should be noted that because the working frequency of the power frequency transformer is low, the power frequency transformer can also be called a low-frequency transformer.

[0053] exist Figure 2 In the power frequency transformer shown, 201 represents the first filter module in the power frequency transformer, 202 represents the DC / AC inverter module, 203 represents the transformer, and 204 represents the second filter module in the power frequency transformer. When the power frequency transformer is working, it is first necessary to use the first filter module 201 in the power frequency transformer to filter the target input voltage, then use the DC / AC inverter module 202 to perform AC conversion on the filtered voltage, and use the transformer 203 to step down the AC converted voltage, and finally use the second filter module 204 in the power frequency transformer to filter the stepped-down voltage, and finally obtain the power supply voltage used to power the load on the monorail train.

[0054] See also Figure 3 , Figure 3 This is a schematic diagram of the principle of a high-frequency transformer when converting the target input voltage. Figure 3 In the high-frequency transformer shown, 301 represents a first filtering module in the high-frequency transformer, 302 represents a DC / DC inverter module, 303 represents a DC / AC inverter module, and 302 represents a second filtering module in the high-frequency transformer.

[0055] When the high-frequency transformer is working, it is first necessary to use the first filtering module 301 in the high-frequency transformer to filter the target input voltage, then use the DC / DC inverter module 302 to convert the filtered voltage into DC, and use the DC / AC module 303 to convert the filtered voltage into AC, and finally use the second filtering module 304 in the high-frequency transformer to filter the converted voltage, and finally obtain the power supply voltage used to power the load on the monorail train.

[0056] Compared with the industrial frequency transformer, under the premise of outputting the same power, the high-frequency transformer has a higher operating frequency and a larger change value of the magnetic flux per unit time. Therefore, the high-frequency transformer can output the power we expect with a small core volume and a small number of coil turns. With the support of high-frequency technology, the core volume of the high-frequency transformer is much smaller than that of the industrial frequency transformer. Therefore, the power supply system provided by this application can significantly reduce the space occupied by the monorail train.

[0057] Compared with industrial frequency transformers, high-frequency transformers have a smaller core volume and fewer coil turns under the premise of outputting the same power. Therefore, the quality of high-frequency transformers will be significantly reduced compared with industrial frequency transformers. Obviously, when the industrial frequency transformer on the monorail is replaced with a high-frequency transformer, the mass of the monorail can be significantly reduced. In addition, when the space occupied by the power supply system is reduced and the mass is lightened, the power supply system is easier to integrate on the monorail.

[0058] In addition, high-frequency transformers also have the characteristics of low switching device loss and high switching frequency. Therefore, when a power supply system built using a high-frequency transformer is used to supply power to the loads on a monorail train, the quality of the power output by the power supply system can also be relatively improved.

[0059] It should be noted that, in actual applications, the ground power supply voltage is usually set to 750V, the first preset DC voltage is set to a DC voltage of 600V, the preset AC voltage is set to an AC voltage of 50Hz and 380V, and the second preset DC voltage is set to a DC voltage of 110V. In addition, the medium voltage load on the monorail train usually refers to the load with a power supply voltage of 380V, such as the air conditioner and electric heating equipment on the monorail train, and the low voltage load on the monorail train usually refers to the load with a power supply voltage of 110V, such as the battery and broadcasting equipment on the monorail train.

[0060] It can be seen that in the power supply system for the monorail train provided in this embodiment, a DC / DC high-frequency chopper module, a DC / AC inverter module and a charger module are provided, wherein the DC / DC high-frequency chopper module converts the ground power supply voltage into a first preset DC voltage through a high-frequency DC / DC converter and a high-frequency transformer, and then the DC / AC inverter module converts the first preset DC voltage into a preset AC voltage to supply power to the medium-voltage load in the monorail train; at the same time, the charger module also converts the first preset DC voltage into a second preset DC voltage to supply power to the low-voltage load in the monorail train. In this embodiment, the ground power supply voltage is mainly converted by high-frequency conversion technology, and the load on the monorail train is supplied with power. Under the premise of outputting the same power, because the magnetic core of the high-frequency transformer is smaller and the number of turns of the coil wound thereon is less, the power supply system provided by this embodiment can significantly reduce the space occupied by the monorail train.

[0061] Based on the above embodiments, this embodiment further explains and optimizes the technical solution. Figure 4 , Figure 4Another structural diagram of a power supply system for a monorail train provided by an embodiment of the utility model. As a preferred implementation, the DC / DC high-frequency chopper module 10 includes: a first voltage sensor TV1, a first current sensor TA1, a first capacitor C1, a second capacitor C2, a third capacitor C3, a fourth capacitor C4, a fifth capacitor C5, a sixth capacitor C6, a seventh capacitor C7, a first resistor R1, a second resistor R2, a first switch tube Q1, a second switch tube Q2 and a high-frequency transformer T1;

[0062] The positive input terminal DCin+ of the ground power supply is respectively connected to the first end of the first voltage sensor TV1, the first end of the first capacitor C1, the first end of the second capacitor C2, the first end of the third capacitor C3, the first end of the second resistor R2, the first end of the seventh capacitor C7 and the first end of the first switch tube Q1, and the negative input terminal DCin- of the ground power supply is respectively connected to the second end of the first voltage sensor TV1, the second end of the first capacitor C1, the second end of the fourth capacitor C4, the second end of the fifth capacitor C5, the second end of the sixth capacitor C6, the second end of the seventh capacitor C7 and the second end of the second switch tube Q2. The first end and the second end of the first resistor R1 are connected to the first end and the second end of the first capacitor C1 respectively, the second end of the second resistor R2 is connected to the first end of the sixth capacitor C6, the second end of the second capacitor C2 is connected to the first end of the fourth capacitor C4, the second end of the third capacitor C3, the first end of the fifth capacitor C5 and the first end of the first current sensor TA1 respectively, the second end of the first switch tube Q1 is connected to the first end of the primary winding of the high-frequency transformer T1 and the first end of the second switch tube Q2 respectively, and the second end of the primary winding of the high-frequency transformer T1 is connected to the second end of the first current sensor TA1;

[0063] Correspondingly, the control end of the first switch tube Q1 and the control end of the second switch tube Q2 are used to receive the control signal sent by the target control chip.

[0064] In this embodiment, a specific description is given of the DC / DC high frequency chopping module 11. The supply voltage of the ground power supply is usually 750V, that is, the voltage between the positive input terminal DCin+ and the negative input terminal DCin- of the ground power supply is 750V.

[0065] In the DC / DC high-frequency chopping module 11, the first capacitor C1, the second capacitor C2, the third capacitor C3, the fourth capacitor C4, the fifth capacitor C5, the sixth capacitor C6, and the seventh capacitor C7 are mainly used for energy storage. The first switch tube Q1 and the second switch tube Q2 receive the control signal sent by the target control chip, use the high-frequency transformer to perform high-frequency conversion on the ground power supply voltage, and convert the ground power supply voltage into a first preset DC voltage, that is, convert the DC voltage of 750V into a DC voltage of 600V.

[0066] The first voltage sensor TV1 mainly detects the voltage signal of the branch where it is located, and the first current sensor TA1 detects the current signal of the branch where it is located. When the first voltage sensor TV1 detects a voltage signal, and / or the first current sensor TA1 detects a current signal, the first voltage sensor TV1 and / or the first current sensor TA1 will feed back the detected signal to the target control chip, so that the target control chip can control the voltage conversion of the back-end circuit by adjusting the control signal sent to the first switch tube Q1 and the second switch tube Q2.

[0067] Obviously, through the technical solution provided in this embodiment, the ground power supply voltage can be converted into the first preset DC voltage by using a DC / DC high-frequency chopping module.

[0068] See also Figure 4 , Figure 4 Another structural diagram of a power supply system for a monorail train provided by an embodiment of the utility model. As a preferred embodiment, the DC / AC inverter module 20 includes: a first diode D1, a second diode D2, a third diode D3, a fourth diode D4, a fifth diode D5, a sixth diode D6, a seventh diode D7, an eighth diode D8, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, a first inductor L1, a second inductor L2, a third inductor L3, a fourth inductor L4, a second voltage sensor TV2, a third voltage sensor TV3, a fourth voltage sensor TV4, a fifth inductor L5, a sixth inductor R6, a second inductor L1, a second inductor L2, a third inductor L3, a fourth inductor L4, a second voltage sensor TV2, a third voltage sensor TV3, a fourth voltage sensor TV4, a fifth inductor L5, a sixth inductor R6, a second inductor L1, a second inductor L2, a third inductor L3, a fourth inductor L4, a second voltage sensor TV2, a third voltage sensor TV3, a fourth voltage sensor TV4, a fifth inductor L5, a sixth inductor R6, a first ... pressure sensor TV5, eighth capacitor C8, ninth capacitor C9, tenth capacitor C10, eleventh capacitor C11, twelfth capacitor C12, thirteenth capacitor C13, third switch tube Q3, fourth switch tube Q4, fifth switch tube Q5, sixth switch tube Q6, seventh switch tube Q7, eighth switch tube Q8, ninth switch tube Q9, tenth switch tube Q10, second current sensor TA2, third current sensor TA3, fourth current sensor TA4, first contactor KM1, second contactor KM2 and third contactor KM3;

[0069] Among them, the first end of the first winding on the secondary side of the high-frequency transformer T1 is respectively connected to the anode of the first diode D1 and the cathode of the second diode D2, the second end of the first winding on the secondary side of the high-frequency transformer T1 is respectively connected to the anode of the fifth diode D5 and the cathode of the sixth diode D6, and the cathode of the first diode D1 is respectively connected to the cathode of the fifth diode D5, the first end of the third resistor R3, the first end of the first inductor L1, the first end of the second voltage sensor TV2, the first end of the tenth capacitor C10, the first end of the third switch tube Q3, the first end of the fifth switch tube Q5, the first end of the seventh switch tube Q7 and the first end of the ninth switch tube Q9;

[0070] The first end of the second winding on the secondary side of the high-frequency transformer T1 is respectively connected to the anode of the third diode D3 and the cathode of the fourth diode D4, the second end of the second winding on the secondary side of the high-frequency transformer T1 is respectively connected to the anode of the seventh diode D7 and the cathode of the eighth diode D8, the anode of the fourth diode D4 is respectively connected to the anode of the eighth diode D8, the second end of the ninth capacitor C9, the second end of the second voltage sensor TV2, the second end of the tenth capacitor C10, the second end of the fourth switch, the second end of the sixth resistor R6, the second end of the sixth switch tube Q6, the second end of the eighth switch tube Q8 and the second end of the tenth switch tube Q10;

[0071] The anode of the second diode D2 is respectively connected to the cathode of the third diode D3, the anode of the sixth diode D6 and the cathode of the seventh diode D7, the second end of the third resistor R3 is connected to the first end of the eighth capacitor C8, the second end of the eighth capacitor C8 is respectively connected to the cathode of the seventh diode D7 and the first end of the fourth resistor R4, and the second end of the fourth resistor R4 is connected to the first end of the ninth capacitor C9; the first end and the second end of the fifth resistor R5 are respectively connected to the first end and the second end of the tenth capacitor C10, the second end of the third switch tube Q3 is respectively connected to the first end of the second current sensor TA2 and the first end of the fourth switch tube Q4, the second end of the second current sensor TA2 is connected to the first end of the sixth resistor R6, the second end of the fifth switch tube Q5 is connected to the first end of the sixth switch tube Q6, the second end of the seventh switch tube Q7 is connected to the first end of the eighth switch tube Q8, and the second end of the ninth switch tube Q9 is connected to the first end of the tenth switch tube Q10;

[0072] The second end of the fifth switch tube Q5 is connected to the first end of the third current sensor TA3, the second end of the third current sensor TA3 is connected to the first end of the second inductor L2, the second end of the second inductor L2 is connected to the first end of the twelfth capacitor C12, the second end of the seventh switch tube Q7 is connected to the first end of the third inductor L3, the second end of the third inductor L3 is connected to the first end of the eleventh capacitor C11, the second end of the ninth switch tube Q9 is connected to the first end of the fourth current sensor TA4, the second end of the fourth current sensor TA4 is connected to the first end of the fourth inductor L4, the second end of the fourth inductor L4 is connected to the first end of the thirteenth capacitor C13, and the second end of the eleventh capacitor C11 is respectively connected to the second end of the twelfth capacitor C12 and the second end of the thirteenth capacitor C13;

[0073] The second end of the second inductor L2 is connected to the first end of the third voltage sensor TV3 and the first end of the first contactor KM1 respectively, the second end of the third inductor L3 is connected to the first end of the second contactor KM2, the second end of the fourth inductor L4 is connected to the first end of the third contactor KM3, the second end of the second contactor KM2 is connected to the first end of the fourth voltage sensor TV4, the second end of the third contactor KM3 is connected to the first end of the fifth voltage sensor TV5, and the second end of the third voltage sensor TV3, the second end of the fourth voltage sensor TV4 and the second end of the fifth voltage sensor TV5 are all connected to the second end of the eleventh capacitor C11;

[0074] Correspondingly, the control end of the third switch tube Q3, the control end of the fourth switch tube Q4, the control end of the fifth switch tube Q5, the control end of the sixth switch tube Q6, the control end of the seventh switch tube Q7, the control end of the eighth switch tube Q8, the control end of the ninth switch tube Q9 and the control end of the tenth switch tube Q10 are all used to receive the control signal sent by the target control chip.

[0075] In this embodiment, the structure of the DC / AC inverter module 20 is specifically introduced. In the DC / AC inverter module 20, the first preset DC voltage is stepped down by using the two windings of the secondary side of the high-frequency transformer T1; then, the stepped-down voltage is converted into a preset AC voltage by using the third switch tube Q3, the fourth switch tube Q4, the fifth switch tube Q5, the sixth switch tube Q6, the seventh switch tube Q7, the eighth switch tube Q8, the ninth switch tube Q9 and the tenth switch tube Q10 to supply power to the medium voltage load in the monorail train. That is, the DC / AC inverter module 12 can convert a 600V DC voltage into a 50Hz, 380V AC voltage.

[0076] Among them, the main functions of the second current sensor TA2, the third current sensor TA3, and the fourth current sensor TA4 are to detect the current of the branch where they are located, and send the detected current signal to the target control chip. The functions of the second voltage sensor TV2, the third voltage sensor TV3, the fourth voltage sensor TV4, and the fifth voltage sensor TV5 are to detect the voltage of the branch where they are located, and send the detected voltage signal to the target control chip. When the target control chip receives the current signal and voltage signal detected by the second current sensor TA2, the third current sensor TA3, the fourth current sensor TA4, the second voltage sensor TV2, the third voltage sensor TV3, the fourth voltage sensor TV4, and the fifth voltage sensor TV5, the target control chip will adjust the control signal sent by each switch tube according to the detected signal, so that the DC / AC inverter module can output a stable 50Hz, 380V AC voltage.

[0077] See also Figure 4 , Figure 4 This is a structural diagram of another power supply system for a monorail train provided by an embodiment of the utility model. As a preferred embodiment, the DC / AC inverter module 20 further includes: a first EMI filter 101 and a first filter capacitor board 102;

[0078] Wherein, the first end, the second end and the third end of the first EMI filter 101 are respectively connected to the second end of the first contactor KM1, the second end of the second contactor KM2 and the second end of the third contactor KM3, the first end, the second end and the third end of the first filter capacitor plate 102 are respectively connected to the second end of the first contactor KM1, the second end of the second contactor KM2 and the second end of the third contactor KM3, the fourth end, the fifth end and the sixth end of the first EMI filter 101 are respectively connected to the fourth end, the fifth end and the sixth end of the first filter capacitor plate 102, the seventh end of the first EMI filter 101 is grounded, and the seventh end and the eighth end of the first filter capacitor plate 102 are respectively connected to the second end of the eleventh capacitor C11;

[0079] Correspondingly, the fourth end, the fifth end and the sixth end of the first EMI filter 101 are respectively the U end, the V end and the W end of the three-phase electricity, and the second end of the eleventh capacitor C11 is the neutral end of the three-phase electricity.

[0080] In practical applications, a first EMI filter 101 and a first filter capacitor plate 102 may be provided in the DC / AC inverter module 12 to filter the 380V AC voltage output by the DC / AC inverter module 12, thereby reducing the harmonic content in the AC power output by the DC / AC inverter module 12, and improving the quality of the electric energy output by the DC / AC inverter module 12, thereby better protecting the medium voltage load in the monorail train.

[0081] When an unbalanced load is connected to the DC / AC inverter module 12, due to the lack of a return path for the unbalanced load current, the DC / AC inverter module 12 will experience zero-sequence voltage distortion when outputting a three-phase voltage. In this embodiment, in order to avoid the above situation, the unbalanced load capacity of the DC / AC inverter module 12 can be improved by adjusting the capacitance values ​​of the eleventh capacitor C11, the twelfth capacitor C12, and the thirteenth capacitor C13, or by adjusting the load of each phase. It should be noted that in this embodiment, the eleventh capacitor C11, the twelfth capacitor C12, and the thirteenth capacitor C13 are set to a star connection.

[0082] For ease of description, in this embodiment, the eleventh capacitor C11, the twelfth capacitor C12 and the thirteenth capacitor C13 in the DC / AC inverter module 20 are referred to as three-phase filter capacitors. If the capacitance of each capacitor in the three-phase filter capacitor is 80uF, then the capacitance of the three-phase filter capacitor can be recorded as 3×80uF. Assuming that the capacitance of the three-phase filter capacitor is 3×80uF, the 380V AC output by the power supply system will have voltage distortion, then at this time, the voltage distortion phenomenon in the three-phase current can be improved by increasing and adjusting the capacitance of the three-phase filter capacitor.

[0083] See also Figures 5 to 8 , Figure 5 This is a simulation diagram of powering a 1kW single-phase load on a monorail train when the capacitance of the three-phase filter capacitor is set to 3×80uF; Figure 6 The simulation diagram of the case where the capacitance of the three-phase filter capacitor is changed to 3×350uF and a 1kW single-phase load on a monorail train is powered; Figure 7 The simulation diagram of the case where the capacitance of the three-phase filter capacitor is changed to 3×350uF and a 0.8kW single-phase load on a monorail train is powered; Figure 8 The simulation diagram of the case where the capacitance of the three-phase filter capacitor is modified to 3×350uF and two groups of 0.8kW single-phase loads are connected to the monorail train for power supply.

[0084] By comparison Figure 5 , Figure 6 , Figure 7 and Figure 8 As shown in the simulation diagram, it can be seen that the imbalance of the three-phase voltage output by the DC / AC inverter module can be improved by adjusting and increasing the capacitance of the three-phase filter capacitor or by reasonably distributing the load of each phase.

[0085] Obviously, through the technical solution provided in this embodiment, the DC / AC inverter module can output a stable AC voltage and reliably supply power to the medium voltage load in the monorail train.

[0086] See also Figure 4 , Figure 4Another structural diagram of a power supply system for a monorail train provided by an embodiment of the utility model. As a preferred embodiment, the charger module 30 includes: an eleventh switch tube Q11, a twelfth switch tube Q12, a thirteenth switch tube Q13, a fourteenth switch tube Q14, a transformer, a fourteenth capacitor C14, a fifteenth capacitor C15, a sixteenth capacitor C16, a fifth current sensor TA5, a sixth current sensor TA6, a seventh current sensor TA7, a seventh resistor R7, an eighth resistor R8, a ninth diode D9, a tenth diode D10, an eleventh diode D11, a fifth inductor L5, a first fuse FU1, a sixth voltage sensor TV6, a second EMI filter 103, and a second filter capacitor plate 104;

[0087] Wherein, the second end of the first inductor L1 is respectively connected to the first end of the eleventh switch tube Q11 and the first end of the thirteenth switch tube Q13, the second end of the second voltage sensor TV2 is respectively connected to the second end of the twelfth switch tube Q12 and the second end of the fourteenth switch tube Q14, the second end of the eleventh switch tube Q11 is respectively connected to the first end of the twelfth switch and the first end of the fifth current sensor TA5, the second end of the fifth current sensor TA5 is connected to the first end of the primary winding of the transformer, the second end of the thirteenth switch tube Q13 is respectively connected to the first end of the fourteenth switch tube Q14 and the first end of the fourteenth capacitor C14, and the second end of the fourteenth capacitor C14 is connected to the second end of the primary winding of the transformer;

[0088] The first end of the secondary winding of the transformer is respectively connected to the first end of the seventh resistor R7 and the positive electrode of the ninth diode D9, the second end of the secondary winding of the transformer is respectively connected to the positive electrode of the tenth diode D10 and the first end of the eighth resistor R8, the second end of the seventh resistor R7 is connected to the first end of the fifteenth capacitor C15, the second end of the eighth resistor R8 is connected to the first end of the sixteenth capacitor C16, the first end of the fifth inductor L5 is respectively connected to the second end of the fifteenth capacitor C15, the negative electrode of the ninth diode D9, the negative electrode of the tenth diode D10 and the second end of the sixteenth capacitor C16, the second end of the fifth inductor L5 is respectively connected to the first end of the second EMI filter 103, the second filter capacitor plate 1 04, the tap of the secondary winding of the transformer is respectively connected to the second end of the second filter capacitor plate 104 and the second end of the second EMI filter 103, the third end of the second EMI filter 103 is respectively connected to the first end of the first fuse FU1 and the first end of the sixth voltage sensor TV6, the second end of the first fuse FU1 is connected to the first end of the sixth current sensor TA6, the second end of the sixth current sensor TA6 is respectively connected to the positive electrode of the eleventh diode D11 and the first end of the seventh current sensor TA7, the second end of the sixth voltage sensor TV6 is connected to the fourth end of the second EMI filter 103, and the fifth end of the second EMI filter 103 is grounded;

[0089] Correspondingly, the voltage between the cathode of the eleventh diode D11 and the fourth end of the second EMI filter 103 is the second preset DC voltage.

[0090] In this embodiment, the charger module 30 mainly converts the first preset DC voltage into the second preset DC voltage through the phase-shifted full-bridge circuit and the transformer T2 to supply power to the low-voltage load in the monorail train. Among them, the eleventh switch tube Q11, the twelfth switch tube Q12, the thirteenth switch tube Q13 and the fourteenth switch tube Q14 form a phase-shifted full-bridge circuit.

[0091] In the charger module 30, the fifth current sensor TA5 and the sixth current sensor TA6 are mainly used to detect the current of the branch where they are located, and the sixth voltage sensor TV6 is mainly used to detect the voltage of the branch where they are located. When the fifth current sensor TA5, the sixth current sensor TA6 and the sixth voltage sensor TV6 detect voltage and current signals, the detected voltage and current signals will be transmitted to the target control chip, so that the target control chip can adjust the control signal sent by the target control chip according to the voltage and current signals detected by the fifth current sensor TA5, the sixth current sensor TA6 and the sixth voltage sensor TV6, so that the charger module 30 can output a stable second preset DC voltage.

[0092] See also Figure 4 , Figure 4 This is a structural diagram of another power supply system for a monorail train provided by an embodiment of the utility model. As a preferred embodiment, the power supply system further includes:

[0093] The pre-charging module 40 is connected to the DC / DC high-frequency chopping module 10 and is used for current limiting processing of the ground power supply voltage.

[0094] Since the ground power supply voltage is relatively high, if the ground power supply voltage is directly transmitted to the power supply system to power the monorail train, it is easy to burn out the components in the power supply system. In this embodiment, in order to avoid the above situation, a pre-charging module 40 is also provided in the power supply system, and the pre-charging module 40 is used to limit the current of the ground power supply voltage.

[0095] As a preferred implementation, the pre-charging module 40 includes: a magnetic ring 105, a second fuse FU2, a seventh voltage sensor TV7, a fourth contactor KM4, a fifth contactor KM5, a ninth resistor R9, a sixth inductor L6, a seventeenth capacitor C17 and an eighth current sensor TA8;

[0096] Among them, the first end of the magnetic ring 105 is respectively connected to the positive input terminal DCin+ of the ground power supply and the first end of the second fuse FU2, the second end of the second fuse FU2 is respectively connected to the first end of the seventh voltage sensor TV7, the first end of the fourth contactor KM4 and the first end of the fifth contactor KM5, the second end of the seventh voltage sensor TV7 is connected to the negative input terminal DCin- of the ground power supply, the second end of the fifth contactor KM5 is connected to the first end of the ninth resistor R9, the second end of the ninth resistor R9 is respectively connected to the second end of the fourth contactor KM4 and the first end of the sixth inductor L6, and the second end of the sixth inductor L6 is connected to the first end of the eighth current sensor TA8;

[0097] Correspondingly, the second end of the eighth current sensor TA8 is connected to the first end of the first voltage sensor TV1.

[0098] In the pre-charging module 40, the magnetic ring 105 is mainly used to store the ground supply voltage and suppress the high-frequency noise in the ground supply voltage, so that the ground supply voltage can be transmitted to the DC / DC high-frequency chopper module 10, the DC / AC inverter module 20 and the charger module 30 in a relatively stable state.

[0099] If the voltage input to the pre-charging module 40 is too high, the second fuse FU2 will be disconnected to ensure the safety of the entire circuit. The eighth current sensor TA8 is used to detect the current of the branch where the eighth current sensor TA8 is located, and the seventh voltage sensor TV7 is used to detect the voltage of the branch where the seventh voltage sensor TV7 is located. When the eighth current sensor TA8 and the seventh voltage sensor TV7 detect voltage and current signals, the detected voltage and current signals will be transmitted to the target control chip, so that the target control chip can adjust the control signal sent by the target control chip according to the voltage and current signals detected by the eighth current sensor TA8 and the seventh voltage sensor TV7, so that the pre-charging module 40 can limit the ground power supply voltage.

[0100] Obviously, the technical solution provided by this embodiment can further ensure the safety of the power supply system during operation.

[0101] Based on the above embodiments, this embodiment further explains and optimizes the technical solution. Fig. 9 , Fig. 9 This is a structural diagram of a heat dissipation fan module provided by an embodiment of the utility model. As a preferred embodiment, the power supply system further includes:

[0102] The heat dissipation fan module 50 is connected to the DC / DC high-frequency chopper module 10 , the DC / AC inverter module 20 and the charger module 30 , and is used to dissipate heat from the DC / DC high-frequency chopper module 10 , the DC / AC inverter module 20 and the charger module 30 .

[0103] Since the DC / DC high-frequency chopper module 10, the DC / AC inverter module 20 and the charger module 30 will inevitably emit a large amount of heat during operation, and affect the safe and stable operation of the DC / DC high-frequency chopper module 10, the DC / AC inverter module 20 and the charger module 30. Therefore, in this embodiment, in order to ensure the stability and reliability of the power supply system during operation, a heat dissipation fan module for dissipating the DC / DC high-frequency chopper module 10, the DC / AC inverter module 20 and the charger module 30 is also provided in the power supply system.

[0104] It should be noted that in Fig. 9 In the heat dissipation fan module 50 shown, the heat dissipation fan module 50 controls the on and off state of the heat dissipation fan module 50 through the sixth contactor KM6 and the seventh contactor KM7.

[0105] Obviously, the technical solution provided by this embodiment can further ensure the safety and reliability of the power supply system during operation.

[0106] As a preferred embodiment, a wave-shaped filter is provided at the air inlet of the heat dissipation fan module 50 .

[0107] In this embodiment, a wave-shaped filter can also be provided at the air inlet of the heat dissipation fan module 50. It is conceivable that after the wave-shaped filter is provided at the air inlet of the heat dissipation fan module 50, the area of ​​the air inlet can be increased, the flow speed of the wind can be reduced, and the noise emitted by the power supply system can be reduced. In addition, after the wave-shaped filter is provided at the air inlet of the heat dissipation fan module 50, the amount of dust entering the heat dissipation fan module 50 can also be reduced.

[0108] In addition, in practical applications, the cross section of the fan blades can be made into a specific arc structure to optimize the line shape of the fan impeller, thereby reducing the noise generated by the heat dissipation fan module. Alternatively, a support column can be set near the fan blades, and the support column can be used to prevent the air outlet of the heat dissipation fan module 50 from being blocked to improve the heat dissipation efficiency of the heat dissipation fan module.

[0109] Obviously, through the technical solution provided in this embodiment, the noise generated by the power supply system can be reduced, and the riding experience of passengers when riding on the monorail train can be further improved.

[0110] Correspondingly, an embodiment of the utility model further provides a monorail train, comprising a power supply system applied to the monorail train as disclosed above.

[0111] A monorail train provided by an embodiment of the utility model has the beneficial effects of the power supply system for a monorail train disclosed above.

[0112] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A power supply system for a monorail train, characterized in that: include: A DC / DC high-frequency chopping module, used for converting a ground power supply voltage into a first preset DC voltage through a high-frequency DC / DC converter and a high-frequency transformer; A DC / AC inverter module, connected to the DC / DC high-frequency chopper module, configured to convert the first preset DC voltage into a preset AC voltage, and use the preset AC voltage to power the medium voltage load in the monorail train; A charger module is connected to the DC / AC inverter module, and is used to convert the first preset DC voltage into a second preset DC voltage through a phase-shifted full-bridge circuit, and use the second preset DC voltage to power the low-voltage load in the monorail train.

2. A power supply system for a monorail train according to claim 1, characterized in that: The DC / DC high-frequency chopping module includes: a first voltage sensor, a first current sensor, a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, a fifth capacitor, a sixth capacitor, a seventh capacitor, a first resistor, a second resistor, a first switch tube, a second switch tube and the high-frequency transformer; Wherein, the positive input end of the ground power supply is respectively connected to the first end of the first voltage sensor, the first end of the first capacitor, the first end of the second capacitor, the first end of the third capacitor, the first end of the second resistor, the first end of the seventh capacitor and the first end of the first switch tube, the negative input end of the ground power supply is respectively connected to the second end of the first voltage sensor, the second end of the first capacitor, the second end of the fourth capacitor, the second end of the fifth capacitor, the second end of the sixth capacitor, the second end of the seventh capacitor and the second end of the second switch tube, the first end and the second end of the first resistor are respectively connected to the first end and the second end of the first capacitor, the second end of the second resistor is connected to the first end of the sixth capacitor, the second end of the second capacitor is respectively connected to the first end of the fourth capacitor, the second end of the third capacitor, the first end of the fifth capacitor and the first end of the first current sensor, the second end of the first switch tube is respectively connected to the first end of the primary winding of the high-frequency transformer and the first end of the second switch tube, and the second end of the primary winding of the high-frequency transformer is connected to the second end of the first current sensor; Correspondingly, the control end of the first switch tube and the control end of the second switch tube are used to receive a control signal sent by a target control chip.

3. A power supply system for a monorail train according to claim 2, characterized in that: The DC / AC inverter module includes: a first diode, a second diode, a third diode, a fourth diode, a fifth diode, a sixth diode, a seventh diode, an eighth diode, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a first inductor, a second inductor, a third inductor, a fourth inductor, a second voltage sensor, a third voltage sensor, a fourth voltage sensor, a fifth voltage sensor, an eighth capacitor, a ninth capacitor, a tenth capacitor, an eleventh capacitor, a twelfth capacitor, a thirteenth capacitor, a third switch tube, a fourth switch tube, a fifth switch tube, a sixth switch tube, a seventh switch tube, an eighth switch tube, a ninth switch tube, a tenth switch tube, a second current sensor, a third current sensor, a fourth current sensor, a first contactor, a second contactor and a third contactor; Wherein, the first end of the first winding of the secondary side of the high-frequency transformer is respectively connected to the positive electrode of the first diode and the negative electrode of the second diode, the second end of the first winding of the secondary side of the high-frequency transformer is respectively connected to the positive electrode of the fifth diode and the negative electrode of the sixth diode, and the negative electrode of the first diode is respectively connected to the negative electrode of the fifth diode, the first end of the third resistor, the first end of the first inductor, the first end of the second voltage sensor, the first end of the tenth capacitor, the first end of the third switch tube, the first end of the fifth switch tube, the first end of the seventh switch tube and the first end of the ninth switch tube; The first end of the second winding of the secondary side of the high-frequency transformer is respectively connected to the anode of the third diode and the cathode of the fourth diode, the second end of the second winding of the secondary side of the high-frequency transformer is respectively connected to the anode of the seventh diode and the cathode of the eighth diode, the anode of the fourth diode is respectively connected to the anode of the eighth diode, the second end of the ninth capacitor, the second end of the second voltage sensor, the second end of the tenth capacitor, the second end of the fourth switch, the second end of the sixth resistor, the second end of the sixth switch tube, the second end of the eighth switch tube and the second end of the tenth switch tube; The anode of the second diode is respectively connected to the cathode of the third diode, the anode of the sixth diode and the cathode of the seventh diode, the second end of the third resistor is connected to the first end of the eighth capacitor, the second end of the eighth capacitor is respectively connected to the cathode of the seventh diode and the first end of the fourth resistor, and the second end of the fourth resistor is connected to the first end of the ninth capacitor; the first end and the second end of the fifth resistor are respectively connected to the first end and the second end of the tenth capacitor, the second end of the third switch tube is respectively connected to the first end of the second current sensor and the first end of the fourth switch tube, the second end of the second current sensor is connected to the first end of the sixth resistor, the second end of the fifth switch tube is connected to the first end of the sixth switch tube, the second end of the seventh switch tube is connected to the first end of the eighth switch tube, and the second end of the ninth switch tube is connected to the first end of the tenth switch tube; The second end of the fifth switch tube is connected to the first end of the third current sensor, the second end of the third current sensor is connected to the first end of the second inductor, the second end of the second inductor is connected to the first end of the twelfth capacitor, the second end of the seventh switch tube is connected to the first end of the third inductor, the second end of the third inductor is connected to the first end of the eleventh capacitor, the second end of the ninth switch tube is connected to the first end of the fourth current sensor, the second end of the fourth current sensor is connected to the first end of the fourth inductor, the second end of the fourth inductor is connected to the first end of the thirteenth capacitor, and the second end of the eleventh capacitor is respectively connected to the second end of the twelfth capacitor and the second end of the thirteenth capacitor; The second end of the second inductor is connected to the first end of the third voltage sensor and the first end of the first contactor respectively, the second end of the third inductor is connected to the first end of the second contactor, the second end of the fourth inductor is connected to the first end of the third contactor, the second end of the second contactor is connected to the first end of the fourth voltage sensor, the second end of the third contactor is connected to the first end of the fifth voltage sensor, and the second end of the third voltage sensor, the second end of the fourth voltage sensor and the second end of the fifth voltage sensor are all connected to the second end of the eleventh capacitor; Correspondingly, the control end of the third switch tube, the control end of the fourth switch tube, the control end of the fifth switch tube, the control end of the sixth switch tube, the control end of the seventh switch tube, the control end of the eighth switch tube, the control end of the ninth switch tube and the control end of the tenth switch tube are all used to receive the control signal sent by the target control chip.

4. A power supply system for a monorail train according to claim 3, characterized in that: Also includes: a first EMI filter and a first filter capacitor board; Wherein, the first end, the second end and the third end of the first EMI filter are respectively connected to the second end of the first contactor, the second end of the second contactor and the second end of the third contactor, the first end, the second end and the third end of the first filter capacitor board are respectively connected to the second end of the first contactor, the second end of the second contactor and the second end of the third contactor, the fourth end, the fifth end and the sixth end of the first EMI filter are respectively connected to the fourth end, the fifth end and the sixth end of the first filter capacitor board, the seventh end of the first EMI filter is grounded, and the seventh end and the eighth end of the first filter capacitor board are respectively connected to the second end of the eleventh capacitor; Correspondingly, the fourth end, the fifth end and the sixth end of the first EMI filter are respectively the U end, the V end and the W end of the three-phase electricity, and the second end of the eleventh capacitor is the neutral end of the three-phase electricity.

5. The power supply system for a monorail train according to claim 3, characterized in that: The charger module includes: an eleventh switch tube, a twelfth switch tube, a thirteenth switch tube, a fourteenth switch tube, a transformer, a fourteenth capacitor, a fifteenth capacitor, a sixteenth capacitor, a fifth current sensor, a sixth current sensor, a seventh current sensor, a seventh resistor, an eighth resistor, a ninth diode, a tenth diode, an eleventh diode, a fifth inductor, a first fuse, a sixth voltage sensor, a second EMI filter, and a second filter capacitor board; Wherein, the second end of the first inductor is respectively connected to the first end of the eleventh switch tube and the first end of the thirteenth switch tube, the second end of the second voltage sensor is respectively connected to the second end of the twelfth switch tube and the second end of the fourteenth switch tube, the second end of the eleventh switch tube is respectively connected to the first end of the twelfth switch and the first end of the fifth current sensor, the second end of the fifth current sensor is connected to the first end of the primary winding of the transformer, the second end of the thirteenth switch tube is respectively connected to the first end of the fourteenth switch tube and the first end of the fourteenth capacitor, and the second end of the fourteenth capacitor is connected to the second end of the primary winding of the transformer; The first end of the secondary winding of the transformer is respectively connected to the first end of the seventh resistor and the positive electrode of the ninth diode, the second end of the secondary winding of the transformer is respectively connected to the positive electrode of the tenth diode and the first end of the eighth resistor, the second end of the seventh resistor is respectively connected to the first end of the fifteenth capacitor, the second end of the eighth resistor is connected to the first end of the sixteenth capacitor, the first end of the fifth inductor is respectively connected to the second end of the fifteenth capacitor, the negative electrode of the ninth diode, the negative electrode of the tenth diode and the second end of the sixteenth capacitor, the second end of the fifth inductor is respectively connected to the first end of the second EMI filter and the first end of the second filter capacitor plate, the tap of the secondary winding of the transformer is respectively connected to the second end of the second filter capacitor plate and the second end of the second EMI filter, the third end of the second EMI filter is respectively connected to the first end of the first fuse and the first end of the sixth voltage sensor, the second end of the first fuse is connected to the first end of the sixth current sensor, the second end of the sixth current sensor is respectively connected to the positive electrode of the eleventh diode and the first end of the seventh current sensor, the second end of the sixth voltage sensor is connected to the fourth end of the second EMI filter, and the fifth end of the second EMI filter is grounded; Correspondingly, the voltage between the cathode of the eleventh diode and the fourth end of the second EMI filter is the second preset DC voltage.

6. The power supply system for a monorail train according to claim 2, characterized in that: Also includes: The pre-charging module is connected to the DC / DC high-frequency chopping module and is used for performing current limiting processing on the ground power supply voltage.

7. The power supply system for a monorail train according to claim 6, characterized in that: The pre-charging module includes: a magnetic ring, a second fuse, a seventh voltage sensor, a fourth contactor, a fifth contactor, a ninth resistor, a sixth inductor, a seventeenth capacitor and an eighth current sensor; Wherein, the first end of the magnetic ring is respectively connected to the positive input end of the ground power supply and the first end of the second fuse, the second end of the second fuse is respectively connected to the first end of the seventh voltage sensor, the first end of the fourth contactor and the first end of the fifth contactor, the second end of the seventh voltage sensor is connected to the negative input end of the ground power supply, the second end of the fifth contactor is connected to the first end of the ninth resistor, the second end of the ninth resistor is respectively connected to the second end of the fourth contactor and the first end of the sixth inductor, and the second end of the sixth inductor is connected to the first end of the eighth current sensor; Correspondingly, the second end of the eighth current sensor is connected to the first end of the first voltage sensor.

8. A power supply system for a monorail train according to any one of claims 1 to 7, characterized in that: Also includes: The heat dissipation fan module is connected to the DC / DC high-frequency chopper module, the DC / AC inverter module and the charger module, and is used to dissipate heat for the DC / DC high-frequency chopper module, the DC / AC inverter module and the charger module.

9. A power supply system for a monorail train according to claim 8, characterized in that: A wave-type filter screen is arranged at the air inlet of the heat dissipation fan module.

10. A monorail train, characterized in that: It comprises a power supply system applied to a monorail train as described in any one of claims 1 to 9.

Images