Wide-range power change module

Abstract

The utility model discloses a wide-range power conversion module, comprising a high-voltage power supply, an output EMI filtering module used for filtering high voltage input by the high-voltage power supply, and the input end of the output EMI filtering module is connected with the output end of the high-voltage power supply; the input end of the DC / DC conversion module is connected with the output end of the output EMI filtering module, and the DC / DC conversion module is used for converting high-voltage electricity into low-voltage electricity; the input end of the output filtering module is connected with the output end of the DC / DC conversion module, and the output filtering module is used for reducing the ripple voltage; the input end of the output redundancy module is connected with the output end of the output filtering module, and the output filtering module is used for preventing output voltage from flowing backwards and realizing output redundancy; the primary side of the transformer is connected with the high-voltage power supply, and the secondary side of the transformer is connected with the output EMI filtering module. The problem of power conversion in different input voltage ranges is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to power change technical field, concretely is wide range power change module. BACKGROUND

[0002] PWM is digital redundancy control technology, and it is the control technology that is universally adopted in the field of DC power conversion, and the technology adopted in the case mainly breaks through in the following two applications, one is full-digital PWM redundancy control, and the other is high-voltage isolation of PWM drive.Full-digital PWM redundancy control mainly solves the problems of high reliability and long-time operation of wide range power conversion module, and through PWM redundancy control, multiple configuration power management modules are connected in parallel, and according to the actual application scene and the change of power management module input power supply and output power supply, self-adaptive adjustment control is carried out, to ensure the reliable and stable operation of the product.PWM drive is most commonly used for low-voltage conversion control below DC 600V, and for high-voltage conversion above DC 600V, high-voltage isolation drive is a technical difficulty.Therefore, a new wide range power conversion module becomes a problem that technicians in the field need to solve urgently. SUMMARY

[0003] The application provides a wide range power conversion module, comprising:

[0004] a high-voltage power supply,

[0005] an output EMI filtering module, which is used for filtering the high-voltage power supply input by the high-voltage power supply, and the input end of the output EMI filtering module is connected with the output end of the high-voltage power supply;

[0006] a DC / DC conversion module, the input end of the DC / DC conversion module is connected with the output end of the output EMI filtering module, and the DC / DC conversion module is used for converting high-voltage power into low-voltage power;

[0007] an output filtering module, the input end of the output filtering module is connected with the output end of the DC / DC conversion module, and the output filtering module is used for reducing ripple voltage;

[0008] an output redundancy module, the input end of the output redundancy module is connected with the output end of the output filtering module, and the output filtering module is used for preventing output voltage from flowing back and realizing output redundancy;

[0009] each branch of the output redundancy module comprises a first output redundancy circuit and a second output redundancy circuit, and the first output redundancy circuit and the second output redundancy circuit are connected in series;

[0010] a transformer, the primary side of the transformer is connected with the high-voltage power supply, and the secondary side of the transformer is connected with the output EMI filtering module.

[0011] Optionally, the DC / DC conversion module is connected with the printed board, and the surface of the DC / DC conversion module is sprayed with a covering heat-conducting silicone grease.

[0012] Optionally, the size of the DC / DC conversion module is 116.8mm x 85mm x 17mm.

[0013] Optionally, the secondary side of the transformer is provided with the first winding and the second winding, the first winding and the second winding are connected in series, the switch tube is connected between the first winding and the second winding, and the switch tube is used to turn on the switch when the high-voltage power supply inputs high-voltage electricity and turn off the switch when the high-voltage power supply inputs low-voltage electricity.

[0014] Optionally, the output EMI filter module includes two branches, namely a first output EMI filter unit and a second output EMI filter unit.

[0015] Optionally, the DC / DC conversion module includes two branches, namely a first DC / DC conversion unit and a second DC / DC conversion unit.

[0016] Optionally, the output filter module includes two branches, namely a first output filter unit and a second output filter unit, and the first output filter unit and the second output filter unit are respectively provided with LC filter circuits.

[0017] Optionally, the output redundancy module includes a first output redundancy unit and a second output redundancy unit, and the output ends of the first output redundancy unit and the second output redundancy unit are respectively connected with the upper computer.

[0018] Optionally, the first output redundancy unit and the second output redundancy unit are respectively provided with a first output redundancy circuit and a second output redundancy circuit, and the first output redundancy circuit and the second output redundancy circuit are connected in series.

[0019] The application has the following beneficial effects:

[0020] 1. The secondary side of the transformer in the application is provided with the first winding and the second winding, the first winding and the second winding are connected in series, the switch tube is connected between the first winding and the second winding, the switch tube is used to turn on the switch when the high-voltage power supply inputs high-voltage electricity and turn off the switch when the high-voltage power supply inputs low-voltage electricity, and the transformer with the switch tube formed by the double windings can selectively convert the voltage power of the high-voltage power supply,

[0021] 2, the size of the DC / DC conversion module in the application is 116.8mm*85mm*17mm, which is a small volume conversion module welded on the printed board, and the small volume and wide range power conversion module is formed by cooperating with the output EMI filter module, the output filter module and the output redundancy module, which is arranged in the internal of the power supply shell and can be used on small volume aircraft for operation, which does not affect the weight and flight of the aircraft, and increases the power conversion range of the aircraft. BRIEF DESCRIPTION OF DRAWINGS

[0022] Fig. 1 The principle structure diagram of the wide range power conversion provided by the utility model is shown.

[0023] Fig. 2 The LC filter circuit schematic diagram provided by the utility model is shown.

[0024] In the figure: 1, high voltage power supply; 2, output EMI filter module; 3, DC / DC conversion module; 4, output filter module; 5, output redundancy module; 6, first output redundancy circuit; 7, second output redundancy circuit; 8, transformer; 9, first winding; 10, second winding; 11, switch tube; 12, first output EMI filter unit; 13, second output EMI filter unit; 14, first DC / DC filter unit, 15, second DC / DC filter unit; 16, first output filter unit; 17, second output filter unit; 18, first output redundancy unit; 19, second output redundancy unit. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the application will be clearly and completely described below with reference to the drawings in the embodiments of the application. Obviously, the described embodiments are only part of the embodiments of the application, not all. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the application.

[0026] Please refer to Figs. 1-2 The application provides a wide range power conversion module, which comprises:

[0027] The high voltage power supply 1 can input external 400VDC-1200VDC high voltage DC power supply, and convert the input of external power supply DC high voltage 400VDC-1200VDC into 48VDC.

[0028] The output EMI filter module 2 is used for filtering the high voltage input by the high voltage power supply 1, and the input end of the output EMI filter module is connected with the output end of the high voltage power supply 1.

[0029] The output EMI filter module 2 comprises two branches, namely a first output EMI filter unit 12 and a second output EMI filter unit 13.

[0030] The first output EMI filter unit 12 and the second output EMI filter unit 13 are mainly used for filtering the high voltage input by the high-voltage power supply 1, suppressing conduction and radiation interference; on the other hand, suppressing the noise generated by the power supply itself, not radiating to the outside of the power supply. The filter unit adopts an LC common-mode filter circuit, the entire filter is packaged into a finished product according to the high-voltage device manufacturing process, and is close to the input connector. This filtering method has good effect when used on other similar products. At the same time, attention is paid to the shielding treatment of the input power line and the selection of the position of the common-mode interference suppression grounding point in the electromagnetic compatibility design, so as to avoid the superposition of the internal electromagnetic interference signals of the circuit on the input power line through the coupling path, and reduce the performance of the EMI filter.

[0031] The DC / DC conversion module 3 is connected with the printed board, and the surface of the DC / DC conversion module 3 is sprayed with a covering heat-conducting silicone grease.

[0032] The DC / DC conversion module 3, the input end of the DC / DC conversion module 3 is connected with the output end of the output EMI filter module 1, and the DC / DC conversion module 3 is used for converting high voltage into low voltage.

[0033] The DC / DC conversion module 3 comprises two branches, namely a first DC / DC conversion unit 14 and a second DC / DC conversion unit 15.

[0034] The size of the DC / DC conversion module is 116.8mm*85mm*17mm.

[0035] It should be noted that the input high voltage is converted into low voltage +48VDC, which is used for powering the load device; the DC / DC converter selected in the module has an output short-circuit and overcurrent protection function, and can automatically restore the output when the fault is removed. When a short circuit or overcurrent occurs in each branch, the output voltage of the branch will be reduced or zero.

[0036] The DC / DC converter selected in the first DC / DC conversion unit 14 and the second DC / DC conversion unit 15 has an overheat protection function. The overheat protection is a cut-off protection, which will close the branch output when an abnormal heating occurs in each branch.

[0037] Please refer to Fig. 2 The output filter module 4, the input end of the output filter module 4 is connected with the output end of the DC / DC conversion module 3, and the output filter module 4 is used for reducing the ripple voltage.

[0038] The output filter module 4 includes two branches, namely a first output filter unit 16 and a second output filter unit 17, which are respectively provided with LC filter circuits.

[0039] The first output filter unit 16 and the second output filter unit 17 are used to reduce the ripple voltage, and the LC filter circuit is designed at the power output end. The selected DC-DC converter has a peak output ripple voltage of about 200 mV, and the additional output low ripple filter circuit (i.e. the LC filter circuit) can reduce the ripple voltage to below 100 mV.

[0040] The output redundancy module 5 has an input end connected with the output end of the output filter module 4, which is used to prevent the output voltage from flowing backward and realize output redundancy.

[0041] Each branch of the output redundancy module 5 includes a first output redundancy circuit 6 and a second output redundancy circuit 7, which are connected in series.

[0042] The output redundancy module 5 includes a first output redundancy unit 18 and a second output redundancy unit 19, and the output ends of the first output redundancy unit 18 and the second output redundancy unit 19 are respectively connected with the upper computer.

[0043] The first output redundancy unit 18 and the second output redundancy unit 19 are respectively provided with a first output redundancy circuit 5 and a second output redundancy circuit 6, which are connected in series.

[0044] Please continue to refer to Fig. 2 As shown, this unit can be an ideal diode with large current, which can prevent the output voltage from flowing backward and realize output redundancy. The first output redundancy circuit 6 and the second output redundancy circuit 7 adopt an output voltage adjustment mode to make the output voltages of the first DC / DC conversion unit 14 and the second DC / DC conversion unit 15 in parallel redundancy as consistent as possible. At the same time, the output end of each DC / DC conversion module 3 of the first output redundancy circuit 6 and the second output redundancy circuit 7 is connected in series with an N-channel field effect transistor and an ideal diode controller, which can prevent current from flowing backward and play a role in fault isolation while ensuring that the power supply voltage load change has a small amplitude. In the working process, the first DC / DC conversion unit 14 and the second DC / DC conversion unit 15 are in a hot backup state, and when the DC / DC conversion module 3 of one branch fails to output, the DC / DC conversion module 3 of the remaining branch can work normally.

[0045] A transformer 8, a primary side of the transformer 8 is connected with the high-voltage power supply 1, a secondary side of the transformer 8 is connected with the output EMI filter module 2.

[0046] The secondary side of the transformer 8 is provided with a first winding 9 and a second winding 10, the first winding 9 and the second winding 10 are connected in series, a switch tube 11 is connected between the first winding 9 and the second winding 10, the switch tube 11 is used for turning on the switch when the high-voltage power supply 1 inputs high-voltage electricity, and turning off the switch when the high-voltage power supply 1 inputs low-voltage electricity.

[0047] The above is only a few embodiments of the present application, and does not limit the present application in any form. Although the preferred embodiments are disclosed above, they are not intended to limit the present application. Any skilled person in the art can make some changes or modifications to the above disclosed technical content without departing from the scope of the technical solution of the present application, which are equivalent to equivalent embodiments, and are within the scope of the technical solution.

Claims

1. A wide range power variation module characterized by, The application relates to a high-voltage power supply (1), an output EMI filter module (2) for filtering high-voltage power input of the high-voltage power supply (1), an input end of the output EMI filter module being connected with an output end of the high-voltage power supply (1), a DC / DC conversion module (3), an input end of the DC / DC conversion module (3) being connected with an output end of the output EMI filter module (2), the DC / DC conversion module (3) being used for converting high-voltage power into low-voltage power, an output filter module (4), an input end of the output filter module (4) being connected with an output end of the DC / DC conversion module (3), the output filter module (4) being used for reducing ripple voltage, an output redundancy module (5), an input end of the output redundancy module (5) being connected with an output end of the output filter module (4), the output filter module (4) being used for preventing output voltage from flowing back and realizing output redundancy, each branch of the output redundancy module (5) comprising a first output redundancy circuit (6) and a second output redundancy circuit (7), the first output redundancy circuit (6) and the second output redundancy circuit (7) being connected in series, a transformer (8), a primary side of the transformer (8) being connected with the high-voltage power supply (1), a secondary side of the transformer (8) being connected with the output EMI filter module (2). The DC / DC conversion module (3) is connected with a printed board, and the surface of the DC / DC conversion module (3) is sprayed with heat-conducting silicon grease. The size of the DC / DC conversion module is 116.8mm*85mm*17mm. The secondary side of the transformer (8) is provided with a first winding (9) and a second winding (10), the first winding (9) and the second winding (10) are connected in series, a switch tube (11) is connected between the first winding (9) and the second winding (10), and the switch tube (11) is used for turning on the switch when high-voltage power is input by the high-voltage power supply (1) and turning off the switch when low-voltage power is input. The output EMI filter module (2) comprises two branches, namely a first output EMI filter unit (12) and a second output EMI filter unit (13). The DC / DC conversion module (3) comprises two branches, namely a first DC / DC filter unit (14) and a second DC / DC filter unit (15). The output filter module (4) comprises two branches, namely a first output filter unit (16) and a second output filter unit (17), and the first output filter unit (16) and the second output filter unit (17) are respectively provided with LC filter circuits. The output redundancy module (5) comprises a first output redundancy unit (18) and a second output redundancy unit (19), and the output ends of the first output redundancy unit (18) and the second output redundancy unit (19) are respectively connected with an upper computer.

2. A wide range power variation module according to claim 1, wherein, ​ 3. A wide range power variation module according to claim 2, wherein, ​ 4. A wide range power variation module according to claim 3, wherein, ​ 5. A wide range power variation module according to claim 4, wherein, ​ 6. A wide range power variation module according to claim 5, wherein, ​ 7. A wide range power variation module according to claim 6, wherein, ​ 8. A wide range power variation module according to claim 7, wherein, ​ 9. A wide range power variation module according to claim 8, wherein, The first output redundancy unit (18) and the second output redundancy unit (19) are respectively provided with a first output redundancy circuit (6) and a second output redundancy circuit (7), and the first output redundancy circuit (6) and the second output redundancy circuit (7) are connected in series.

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