CN212726828U

CN212726828U - Low-power compact H-bridge high-voltage frequency converter power unit

Info

Publication number: CN212726828U
Application number: CN202021538067.8U
Authority: CN
Inventors: 程玉雪; 陈昶; 黄林波; 干永革
Original assignee: Cisdi Electric Technology Co ltd
Current assignee: Cisdi Electric Technology Co ltd
Priority date: 2020-07-28
Filing date: 2020-07-28
Publication date: 2021-03-16
Anticipated expiration: 2030-07-28

Abstract

The utility model relates to a miniwatt compact H bridge high-voltage inverter power unit belongs to semiconductor switch technical field, which comprises a housin, be equipped with radiator subassembly and radiator wind channel in the casing, be equipped with divider resistance on the radiator wind channel, still be equipped with electric capacity subassembly in the casing, be equipped with bypass board subassembly on the electric capacity subassembly one side of electric capacity subassembly still is provided with the major control system subassembly. The capacitor assembly of the unit and the heat dissipation air duct of the radiator assembly are mutually independent, the heat dissipation effect is good, the main control system assembly is fixed above the capacitor assembly through screws, the structure is compact, the arrangement is reasonable, the unit volume is reduced by 1.5 times compared with the same power product, the reliability is enhanced, and the IP protection level of the power unit is improved.

Description

Low-power compact H-bridge high-voltage frequency converter power unit

Technical Field

The utility model belongs to the technical field of semiconductor switch, a miniwatt compact H bridge high-voltage inverter power unit is related to.

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.

The prior technical scheme of the similar product has the following problems: the power unit has large volume, the capacitor bank serial-parallel scheme is complex, and the number of fault points is large. Secondly, the distance between the direct current capacitor and the radiator is not uniform, so that the capacitor assembly is not uniformly heated, and the service life is reduced. And the power unit has low IP protection level, dust and moisture enter the unit, so that the insulation failure of electronic components is caused, and the environmental adaptability is poor. And fourthly, most of unit wire inlet is carried out by adopting a cable, so that assembly and field maintenance are not facilitated.

SUMMERY OF THE UTILITY MODEL

In view of this, the present invention provides a low-power compact H-bridge high-voltage inverter power unit.

In order to achieve the above purpose, the utility model provides a following technical scheme:

the utility model provides a miniwatt compact H bridge high-voltage inverter power unit, includes the casing, be equipped with radiator subassembly and radiator wind channel in the casing, be equipped with divider resistance on the radiator wind channel, still be equipped with capacitor assembly in the casing, be equipped with bypass board subassembly on the capacitor assembly one side of capacitor assembly still is provided with the major control system subassembly.

Furthermore, the radiator assembly comprises a radiator, a rectifier diode, an IGBT power module and a bypass silicon controlled module, the rectifier diode, the IGBT power module and the bypass silicon controlled module are arranged on the radiator, a unit incoming line is connected with the rectifier diode through an incoming line busbar, then the unit incoming line is connected with the input end of the capacitor assembly and the input end of the IGBT power module, and the output end of the IGBT power module is connected with an output power terminal arranged outside the shell.

Further, the capacitor assembly comprises a capacitor mounting plate, an intermediate capacitor cover plate, a voltage-sharing resistor and a plurality of capacitors, the capacitors are arranged on the capacitor mounting plate and fixed with the capacitor cover plate through the intermediate capacitor cover plate, and the capacitors are connected through the voltage-sharing resistor.

Furthermore, the capacitor assembly further comprises a heat dissipation air duct of the capacitor assembly, and the heat dissipation air duct and the heat radiator air duct are mutually independent.

Further, the shell comprises a base body, a front panel, a rear panel and a rear cover.

The beneficial effects of the utility model reside in that: the capacitor assembly of the unit and the heat dissipation air duct of the radiator assembly are mutually independent, the heat dissipation effect is good, the main control system assembly is fixed above the capacitor assembly through screws, the structure is compact, the arrangement is reasonable, the unit volume is reduced by 1.5 times compared with the same power product, the reliability is enhanced, and the IP protection level of the power unit is improved.

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 diagram of an internal structure of a power unit of a low-power compact H-bridge high-voltage inverter;

FIG. 3 is an external structure diagram of a power unit of a low-power compact H-bridge high-voltage inverter;

FIG. 4 is a layout view of the unit radiator assembly of the present invention;

fig. 5 is a layout diagram of the unit capacitor assembly of the present invention.

Reference numerals: the circuit comprises a base body 1, a radiator component 2, a bypass board component 3, a capacitor component 4, a main control system component 5, a radiator air duct board 6, a divider resistor 7, a front panel 8, a rear panel 9, a rear cover 10, a radiator 11, an output power terminal 12, an incoming line busbar 13, a rectifier diode 14, an IGBT power module 15, a bypass silicon controlled module 16, an IGBT power module 17, a voltage-sharing resistor 18, a capacitor 19, a capacitor mounting plate 20, an intermediate capacitor cover plate 21 and a capacitor cover plate 22.

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.

Referring to fig. 2 to 5, the power unit of a low-power compact H-bridge high-voltage inverter includes a base 1, a front panel 8, a voltage divider resistor 7, a radiator air duct plate 6, a radiator assembly 2, a bypass plate assembly 3, a capacitor assembly 4, a main control system assembly 5, a rear panel 9 and a rear cover 10, where the base 1, the front panel 8, the rear panel 9 and the rear cover 10 form a housing, the radiator air duct plate 6 is connected with the radiator assembly 2 and the base 1 respectively through bolts, the voltage divider resistor 7 is fixed on the radiator air duct plate 6 through screws, the radiator assembly 2 is connected with the base 1, the front panel 8 and the rear panel 9 respectively through screws, the capacitor assembly 4 is connected with the base 1 through rivets, and the bypass plate assembly 3 is fixed on the capacitor assembly through screws; the main control system component 5 is fixed on the capacitor component 4 through screws.

The unit inlet wire is directly connected with the rectifier diode 14 through the inlet wire busbar 13, the unit inlet wire is electrically connected with the capacitor assembly 4 and is connected with the input end of the IGBT module 15, and the output end of the IGBT power module 15 is output to the outside of the shell through the output power terminal 12.

Optionally, the rectifier diode 14, the IGBT power module 15, the radiator 11, and the bypass thyristor module 16 constitute the radiator assembly 2, wherein the rectifier diode 14, the IGBT power module 15, the radiator 11, and the bypass thyristor module 16 are all fixed to the radiator 11 by bolts, and the radiator assembly further includes an IGBT power module 17 installed on the other side of the IGBT power module 15 relative to the bypass thyristor module 16.

Optionally, the bypass plate assembly 3 is fixed on the capacitor assembly 4 through screws, so that the assembly and disassembly are convenient, and the volume is reduced.

Optionally, the heat sink air duct plate 6 and the heat sink 11 form an independent air duct, which is independent from the air duct of the capacitor module 4, so as to facilitate heat dissipation.

Optionally, the main control system assembly 5 is fixed above the capacitor assembly 4 through screws, so that the installation and the disassembly are convenient, and the structure is compact.

Optionally, the capacitor assembly 4 includes a capacitor mounting plate 20, an intermediate capacitor cover plate 21, a capacitor cover plate 22, a voltage equalizing resistor 18, and a capacitor 19, where the intermediate capacitor cover plate 21 is connected to the capacitor mounting plate 20 by a rivet connection.

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

1. The utility model provides a miniwatt compact H bridge high-voltage inverter power unit which characterized in that: the radiator comprises a shell, wherein a radiator assembly and a radiator air duct are arranged in the shell, a divider resistor is arranged on the radiator air duct, a capacitor assembly is further arranged in the shell, a bypass plate assembly is arranged on the capacitor assembly, and a main control system assembly is further arranged on one side of the capacitor assembly.

2. The small power compact H-bridge high voltage inverter power unit of claim 1, wherein: the radiator assembly comprises a radiator, a rectifier diode, an IGBT power module and a bypass silicon controlled module, the rectifier diode, the IGBT power module and the bypass silicon controlled module are arranged on the radiator, a unit incoming line is connected with the rectifier diode through an incoming line busbar, then the unit incoming line is connected with the capacitor assembly and the input end of the IGBT power module, and the output end of the IGBT power module is connected with an output power terminal arranged outside the shell.

3. The small power compact H-bridge high voltage inverter power unit of claim 1, wherein: the capacitor assembly comprises a capacitor mounting plate, an intermediate capacitor cover plate, a voltage-sharing resistor and a plurality of capacitors, the capacitors are arranged on the capacitor mounting plate and fixed with the capacitor cover plate through the intermediate capacitor cover plate, and the capacitors are connected through the voltage-sharing resistor.

4. The small power compact H-bridge high voltage inverter power unit of claim 1, wherein: the capacitor assembly further comprises a heat dissipation air duct of the capacitor assembly, and the heat dissipation air duct and the heat radiator air duct are mutually independent.

5. The small power compact H-bridge high voltage inverter power unit of claim 1, wherein: the shell comprises a base body, a front panel, a rear panel and a rear cover.