CN209948941U - Compact H-bridge high-voltage frequency converter power unit - Google Patents
Compact H-bridge high-voltage frequency converter power unit Download PDFInfo
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- CN209948941U CN209948941U CN201920906512.2U CN201920906512U CN209948941U CN 209948941 U CN209948941 U CN 209948941U CN 201920906512 U CN201920906512 U CN 201920906512U CN 209948941 U CN209948941 U CN 209948941U
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Abstract
The utility model relates to a compact H bridge high-voltage inverter power unit belongs to semiconductor switch technical field, and base member, front panel, rear panel, upper cover and leading-out terminal shrouding form an airtight casing, rectifier diode, IGBT power module, divider resistance, bypass silicon controlled rectifier module, absorption capacitance are all installed on the radiator, direct current electric capacity and voltage-sharing resistance pass through electric capacity connecting bus and form direct current electric capacity group and settle in the radiator downside to realize direct current electric capacity group and rectifier diode electrical connection, connect simultaneously in IGBT power module's input, rectifier diode regards as its power supply input with the input power terminal, and IGBT power module's output passes through the output power terminal and exports to the casing outside, main control system passes through the insulation board and installs in direct current electric capacity group left side. The utility model discloses compact structure is reasonable, and power density is big, the electric capacity group and the parallelly connected heat dissipation wind channel of radiator, and IP protection level is high, and environmental suitability is strong.
Description
Technical Field
The utility model belongs to the technical field of belong to semiconductor switch, concretely relates to compact H bridge high-voltage inverter power unit.
Background
The H-bridge high-voltage frequency converter power unit is mainly used for high-voltage frequency converter equipment and used for adjusting the running frequency of a motor. The circuit topology structure diagram of the power unit is shown in figure 1. External three-phase alternating current power supply is changed into direct current through a diode rectifier and enters a power unit, a capacitor bank is charged, voltage stabilization is achieved, the direct current voltage obtained after voltage stabilization is provided for a single-phase H-shaped bridge type inverter composed of IGBTs, the direct current voltage is inverted into output voltage with given frequency, and the output voltage is used for being connected with other power units in series for output.
① power unit is bulky, the capacitor bank series-parallel scheme is complicated, the fault point is more. ② only cools the power device, does not cool the direct current capacitor, or the power device and the direct current capacitor are connected in series and the air duct radiates heat, which causes the radiator to have too large design margin, the capacitor has low reliability and short service life. ③ power unit has low IP protection level, dust and moisture enter the unit, which causes the insulation failure of electronic components and poor environmental adaptability.
SUMMERY OF THE UTILITY MODEL
In view of the above, an object of the present invention is to provide a compact H-bridge high-voltage inverter power unit, which simplifies the series-parallel connection of capacitor banks; the heat dissipation and ventilation air duct is optimized; and redundant openings are sealed, the IP protection level of the power unit is improved, and the environmental adaptability is enhanced.
In order to achieve the above purpose, the utility model provides a following technical scheme:
a compact H-bridge high-voltage frequency converter power unit comprises a base body, an upper cover, a front panel, a rear panel, an incoming line terminal, an outgoing line terminal, a fast melting plate, an outlet sealing plate, a radiator, a rectifier diode, an IGBT power module, a voltage-sharing resistor, a voltage-dividing resistor, a bypass silicon-controlled module, an absorption capacitor, a direct-current capacitor and a main control system; the base body, the front panel, the rear panel, the upper cover and the outlet seal plate form a closed shell; the rectifier diode, the divider resistor, the IGBT power module and the bypass silicon controlled module are sequentially arranged on the radiator, and the bypass silicon controlled module is arranged close to the front panel; the direct current capacitor and the voltage-sharing resistor are connected through a bus to form a direct current capacitor set, and the direct current capacitor set is arranged on the lower side of the radiator; the direct current capacitor bank is electrically connected with the rectifier diode through bus connection, and the rectifier diode is connected to the input end of the IGBT power module at the same time, the rectifier diode takes an incoming terminal as the power supply input of the rectifier diode, and the output end of the IGBT power module is output to the outside of the substrate through an outgoing terminal; the main control system is arranged on the left side of the direct current capacitor bank through an insulating plate; the inlet wire terminal and the outlet wire terminal are respectively arranged on the front panel and protrude out of the front panel, an outlet hole of the outlet wire terminal is sealed by an outlet sealing plate, and the inlet wire terminal is provided with the fast melting plate.
Further, the radiator is provided with an independent radiating and ventilating air duct.
Furthermore, the direct current capacitor bank is tightly attached to the front panel, the rear panel and the base body, and the main control system insulating plate is tightly attached to the left side face of the direct current capacitor bank, so that the direct current capacitor bank and the base body are partially sealed to form an independent capacitor heat dissipation ventilation air duct.
Furthermore, square ventilation holes are formed in the front panel and the rear panel, and the ventilation hole area is contained in the range of the capacitor ventilation air duct.
Further, the direct current capacitor bank comprises three direct current capacitors, and each capacitor is provided with one voltage-sharing resistor.
The beneficial effects of the utility model reside in that: the unit reduces the number and complexity of capacitors, reduces fault points, obviously reduces the unit volume, and improves the power density by 44.1 percent compared with similar products; the direct-current capacitor bank and the radiator are designed into the parallel heat dissipation ventilation air duct, so that the volume of the radiator is obviously reduced, the reliability of the capacitor is enhanced, and the heat dissipation performance is improved; and the insulation board is used for sealing redundant openings, so that the IP protection grade of the power unit is improved, the power unit can be applied to severe environments such as moist environment, high dust environment and the like, and the environmental adaptability is enhanced.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objectives and other advantages of the invention may be realized and attained by the means of the instrumentalities and/or combinations particularly pointed out in the appended claims.
Drawings
For the purposes of promoting a better understanding of the objects, features and advantages of the invention, reference will now be made to the following detailed description taken in conjunction with the accompanying drawings in which:
FIG. 1 is a circuit topology diagram of a power cell;
fig. 2 is a schematic diagram of an external structure of a power unit of the compact H-bridge high-voltage inverter according to an embodiment of the present invention;
fig. 3 is the embodiment of the utility model provides a compact H bridge high-voltage inverter power unit internal structure schematic diagram.
Reference numerals: the high-voltage direct-current power supply comprises a base body 1, an upper cover 2, a front panel 3, a rear panel 4, a wire inlet terminal 5, a wire outlet terminal 6, a fast fuse 7, an outlet seal plate 8, a radiator 9, a rectifier diode 10, an IGBT power module 11, a voltage-sharing resistor 12, a voltage-dividing resistor 13, a bypass silicon controlled module 14, an absorption capacitor 15, a direct-current capacitor 16, a main control system 17, a bus 18 and a direct-current capacitor group 19.
Detailed Description
The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will be readily apparent to those skilled in the art from the disclosure herein. The present invention can also be implemented or applied through other different specific embodiments, and various details in the present specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present invention, and the features in the following embodiments and examples may be combined with each other without conflict.
Wherein the showings are for the purpose of illustrating the invention only and not for the purpose of limiting the same, and in which there is shown by way of illustration only and not in any way limiting the scope of the invention; for a better understanding of the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
The same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if there are terms such as "upper", "lower", "left", "right", "front", "back", etc., indicating directions or positional relationships based on the directions or positional relationships shown in the drawings, it is only for convenience of description and simplification of description, but it is not intended to indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore, the terms describing the positional relationships in the drawings are only used for illustrative purposes and are not to be construed as limiting the present invention, and those skilled in the art can understand the specific meanings of the terms according to specific situations.
As shown in fig. 2-3, a compact H-bridge high-voltage inverter power unit includes a base 1, an upper cover 2, a front panel 3, a rear panel 4, a wire inlet terminal 5, a wire outlet terminal 6, a fast fuse 7, an outlet seal plate 8, a heat sink 9, a rectifier diode 10, an IGBT power module 11, a voltage-sharing resistor 12, a voltage-dividing resistor 13, a bypass thyristor module 14, an absorption capacitor 15, a dc capacitor 16, and a main control system 17.
The base body 1, the front panel 3, the rear panel 4, the upper cover 2 and the outlet seal plate 8 form a closed shell, the incoming line terminal 5 and the outgoing line terminal 6 are respectively arranged on the front panel 3 and protrude out of the front panel 3, the A, C-phase incoming line terminal 5 is provided with the fast melting 7, meanwhile, the outlet hole of the outgoing line terminal 6 is sealed by the insulating outlet seal plate 8, and the integral IP protection grade of the unit is improved.
The rectifier diode 10, the divider resistor 13, the two IGBT power modules 11 and the bypass silicon controlled module 14 are sequentially mounted on the radiator 9, the bypass silicon controlled module 14 is arranged close to the front panel 3, and the radiator 9 is designed with an independent heat dissipation and ventilation air duct.
The direct current capacitor 16 and the voltage-sharing resistors 12 are connected in series through a bus 18 to form a direct current capacitor group 19, the direct current capacitor group 19 comprises three direct current capacitors 16, each capacitor is provided with one voltage-sharing resistor 12, and the direct current capacitor group 19 is installed on the lower side of the radiator 9; the direct current capacitor bank 19 is electrically connected with the rectifier diode 10 through the bus 18, and is also connected with the input end of the IGBT power module 11, the rectifier diode 10 takes the incoming terminal 5 as the power supply input, and the output end of the IGBT power module 11 is output to the outside of the base body 1 through the outgoing terminal 6.
The direct current capacitor bank 19 is tightly attached to the front panel 3, the rear panel 4 and the base body 1, and the main control system insulating plate 20 is tightly attached to the left side face of the direct current capacitor bank 19, so that the direct current capacitor bank 19 and the base body 1 are partially sealed to form an independent capacitor heat dissipation ventilation air duct. The front panel 3 and the rear panel 4 are both provided with square vent holes 21 with enough vent areas, and the areas of the vent holes 21 are contained in the range of a capacitor vent air duct to provide channels for cooling air flow of the direct current capacitor bank 19.
Finally, the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions, and all of them should be covered by the scope of the claims of the present invention.
Claims (5)
1. The utility model provides a compact H bridge high-voltage inverter power unit which characterized in that: the fast-melting type solar cell comprises a base body, an upper cover, a front panel, a rear panel, an incoming line terminal, an outgoing line terminal, a fast-melting outlet sealing plate, a radiator, a rectifier diode, an IGBT power module, a voltage-sharing resistor, a voltage-dividing resistor, a bypass silicon controlled module, an absorption capacitor, a direct-current capacitor and a main control system; the base body, the front panel, the rear panel, the upper cover and the outlet seal plate form a closed shell; the rectifier diode, the divider resistor, the IGBT power module and the bypass silicon controlled module are sequentially arranged on the radiator, and the bypass silicon controlled module is arranged close to the front panel; the direct current capacitor and the voltage-sharing resistor are connected through a bus to form a direct current capacitor set, and the direct current capacitor set is arranged on the lower side of the radiator; the direct current capacitor bank is electrically connected with the rectifier diode through bus connection, and the rectifier diode is connected to the input end of the IGBT power module at the same time, the rectifier diode takes an incoming terminal as the power supply input of the rectifier diode, and the output end of the IGBT power module is output to the outside of the substrate through an outgoing terminal; the main control system is arranged on the left side of the direct current capacitor bank through an insulating plate; the inlet wire terminal and the outlet wire terminal are respectively arranged on the front panel and protrude out of the front panel, an outlet hole of the outlet wire terminal is sealed by an outlet sealing plate, and the inlet wire terminal is provided with the fast melting plate.
2. The compact H-bridge high-voltage inverter power unit of claim 1, wherein: the radiator is provided with an independent radiating and ventilating air duct.
3. The compact H-bridge high-voltage inverter power unit of claim 1, wherein: the direct current capacitor bank is closely attached to the front panel, the rear panel and the base body, and the main control system insulating plate is closely attached to the left side face of the direct current capacitor bank, so that the direct current capacitor bank and the base body are partially sealed to form an independent capacitor heat dissipation ventilation air duct.
4. The compact H-bridge high-voltage inverter power unit of claim 1, wherein: the front panel and the rear panel are both provided with square vent holes, and the vent hole area is contained in the range of the capacitor vent air duct.
5. The compact H-bridge high-voltage inverter power unit of claim 1, wherein: the direct current capacitor bank comprises three direct current capacitors, and each capacitor is provided with one voltage-sharing resistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920906512.2U CN209948941U (en) | 2019-06-17 | 2019-06-17 | Compact H-bridge high-voltage frequency converter power unit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920906512.2U CN209948941U (en) | 2019-06-17 | 2019-06-17 | Compact H-bridge high-voltage frequency converter power unit |
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| Publication Number | Publication Date |
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| CN209948941U true CN209948941U (en) | 2020-01-14 |
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| CN201920906512.2U Active CN209948941U (en) | 2019-06-17 | 2019-06-17 | Compact H-bridge high-voltage frequency converter power unit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112994413A (en) * | 2021-03-24 | 2021-06-18 | 深圳市英威腾电气股份有限公司 | Natural heat dissipation frequency converter |
-
2019
- 2019-06-17 CN CN201920906512.2U patent/CN209948941U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112994413A (en) * | 2021-03-24 | 2021-06-18 | 深圳市英威腾电气股份有限公司 | Natural heat dissipation frequency converter |
| CN112994413B (en) * | 2021-03-24 | 2022-12-30 | 深圳市英威腾电气股份有限公司 | Natural heat dissipation frequency converter |
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