CN210985952U

CN210985952U - H-bridge high-voltage frequency converter power unit with high protection level

Info

Publication number: CN210985952U
Application number: CN201921913515.5U
Authority: CN
Inventors: 陈昶; 程玉雪; 干永革; 黄林波
Original assignee: Cisdi Electric Technology Co ltd
Current assignee: Cisdi Electric Technology Co ltd
Priority date: 2019-11-07
Filing date: 2019-11-07
Publication date: 2020-07-10
Anticipated expiration: 2029-11-07

Abstract

The utility model relates to a high protection level H bridge high-voltage inverter power unit, which belongs to the technical field of semiconductor switches and comprises a shell, a radiator component, a bypass board module, a capacitor component and a master control system component; the radiator assembly and the capacitor assembly are arranged in the shell; the capacitor assembly is arranged below the radiator assembly, and the bypass plate module is connected with the radiator assembly; the radiator component comprises a rectifier diode, an IGBT power module, a divider resistor, a bypass silicon controlled module, an absorption capacitor and a radiator; the voltage dividing resistor is arranged at the bottom of the radiator, and the bypass silicon controlled module is arranged between the two IGBT power modules; the unit inlet wire is connected with the rectifier diode through the inlet wire busbar and is electrically connected with the capacitor assembly and connected to the input end of the IGBT power module, and the output end of the IGBT power module is output to the outside of the shell through the output power terminal.

Description

H-bridge high-voltage frequency converter power unit with high protection level

Technical Field

The utility model belongs to the technical field of semiconductor switch, a H bridge high-voltage inverter power unit of high protection level 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 of the power cell is shown in fig. 6. 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 connection scheme is complicated, the fault point is more, ② direct current capacitor and radiator are far and near uneven, make the capacitor block heated unevenly, the life-span is reduced, ③ power unit IP protects the low grade, dust and moisture enter the unit, cause the insulating failure of electronic components, the environmental suitability is bad, ④ unit inlet wire is mostly carried on by the cable, unfavorable to assemble and field maintenance.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model aims at providing a H bridge high-voltage inverter power unit of high protection level, this unit adopt the modularized design, compact structure arranges rationally, and electric capacity is heated evenly, long service life, and its wind channel and radiator wind channel mutually independent, and ventilation effect is good, and the IP protection level is high.

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

a high protection level H-bridge high-voltage frequency converter power unit comprises a base body, a front panel, a radiator assembly, a bypass board module, a capacitor assembly, a main control system assembly, a rear panel and a rear cover; the base body, the front panel, the rear panel and the rear cover form a shell, and the radiator assembly and the capacitor assembly are arranged in the shell; the capacitor assembly is arranged below the radiator assembly, and the bypass plate module is connected with the radiator assembly;

the radiator component comprises a rectifier diode, an IGBT power module, a divider resistor, a bypass silicon controlled module, an absorption capacitor and a radiator; the voltage dividing resistor is arranged at the bottom of the radiator, and the bypass silicon controlled module is arranged between the two IGBT power modules; the unit inlet wire is connected with the rectifier diode through the inlet wire busbar and is electrically connected with the capacitor assembly and connected to the input end of the IGBT power module, and the output end of the IGBT power module is output to the outside of the shell through the output power terminal.

Furthermore, the unit incoming line is connected with the rectifier diode through the incoming line busbar and is positioned on the same side (front panel) with the outgoing line busbar, and the inlet and outlet of the incoming and outgoing line busbar are sealed by the insulating outlet sealing plate, so that the integral IP protection level of the unit is improved.

Further, the electric capacity subassembly includes the electric capacity mounting panel, install a plurality of electric capacities through last installation lantern ring and lower installation lantern ring in the electric capacity mounting panel, connect through first run-on, second run-on between the electric capacity and be electric capacity group to be equipped with electric capacity group negative pole and electric capacity group positive pole, the positive negative pole of every electric capacity is connected with voltage-sharing resistance, still including the electric capacity apron that is used for sealing electric capacity.

Furthermore, the capacitor assembly is positioned under the radiator assembly, and the respective radiating air channels are mutually independent, so that the radiating is facilitated.

Furthermore, the main control system assembly is arranged on the right side of the radiator assembly through a support, and the arrangement is reasonable, so that the unit structure is compact, and the volume of the unit product is reduced by 1 time compared with that of a unit product with the same power.

Furthermore, the capacitor assembly is connected with the front panel through a rivet nut and a rivet.

The beneficial effects of the utility model reside in that: the capacitor arrangement mode and the relative position of the capacitor and the radiator of the unit in the scheme obviously prolong the service life of the capacitor and reduce fault points; the structure is compact, the arrangement is reasonable, and the unit volume is reduced by 1 time compared with the unit volume of the product with the same power; the radiator assembly and the capacitor assembly respectively adopt independent air channels, so that the heat dissipation performance is improved, 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 schematic diagram of an overall structure of a power unit of the H-bridge high-voltage frequency converter with the high protection level;

fig. 2 is a schematic diagram of a back side structure of the power unit of the H-bridge high-voltage frequency converter with the high protection level;

fig. 3 is a schematic diagram of the installation of the components of the master control system of the power unit of the H-bridge high-voltage frequency converter with the high protection level;

FIG. 4 is a schematic structural diagram of the capacitor assembly;

FIG. 5 is a schematic view of the heat sink assembly;

fig. 6 is a circuit topology of a power unit according to the related art.

Reference numerals: the device comprises a base body 1, a front panel 2, a radiator component 3, a bypass board module 4, a capacitor component 5, a main control system component 26, a rear panel 6, a rear panel 7, a capacitor bank negative electrode 8, a first connecting bar 9, a voltage-sharing resistor 10, a second connecting bar 11, an upper mounting lantern ring 12, a capacitor 13, a capacitor mounting plate 14, a lower mounting lantern ring 15, a capacitor cover plate 16, a capacitor bank positive electrode 17, a wire outlet busbar 18, a voltage-dividing resistor 19, a wire inlet busbar 20, a rectifier diode 21, an IGBT power module 22, a radiator 23, an absorption capacitor 24, a bypass silicon controlled module 25 and a main control system component 26.

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. 1 to 5, a power unit of an H-bridge high-voltage inverter with high protection level includes a substrate 1, a front panel 2, a heat sink assembly 3, a bypass board module 4, a capacitor assembly 5, a main control system assembly 26, a rear panel 6, and a rear cover 7.

The radiator assembly 3 and the capacitor assembly 5 are respectively connected with the base body 1, the front panel 2 and the rear panel 6, the capacitor assembly 5 is positioned right below the radiator assembly 3, and the bypass board assembly 4 is fixed on a radiator 23 through screws; the unit inlet wire is directly connected with the rectifier diode 21 through the inlet wire busbar 20, is electrically connected with the capacitor assembly 5 and is connected to the input end of the IGBT power module 25, and the output end of the IGBT power module 25 is output to the outside of the shell through the output power terminal.

The radiator component 3 comprises a rectifier diode 21, an IGBT power module 22, a voltage division resistor 19, a bypass silicon controlled module 25, an absorption capacitor 24 and a radiator 23; the divider resistor 19 is hung at the bottom of the radiator 23, and the bypass silicon controlled module 25 is positioned between the two IGBT power modules 22.

The incoming line of the unit is directly connected with the rectifier diode 21 through the incoming line busbar 20 and is positioned on the same side (the front panel 2) as the outgoing line busbar 18, and the inlet and outlet of the incoming and outgoing line busbar are sealed by the insulating outlet sealing plate, so that the integral IP protection level of the unit is improved.

The capacitor assembly 5 is positioned right below the radiator assembly 3, and the respective radiating air channels are mutually independent, so that the radiating is convenient. The capacitor assembly 5 comprises a capacitor mounting plate 14, a plurality of capacitors 13 are mounted in the capacitor mounting plate through an upper mounting lantern ring 12 and a lower mounting lantern ring 15, the capacitors 13 are connected to form a capacitor bank through a first connecting row 9 and a second connecting row 11, a capacitor bank cathode 8 and a capacitor bank anode 17 are arranged, a voltage-sharing resistor 10 is connected between the anode and the cathode of each capacitor 13, and the capacitors 13 are sealed by a capacitor cover plate 16 after being placed into the capacitor mounting plate 14.

The main control system component 26 is arranged on the right side of the radiator component 3 through a bracket, and the arrangement is reasonable, so that the unit structure is compact, and the volume is reduced by 1 time compared with the unit product with the same power.

The capacitor assembly 5 is connected with the front panel in a connecting mode of a rivet nut and a rivet.

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 H bridge high-voltage inverter power unit of high protection level which characterized in that: the device comprises a base body, a front panel, a radiator assembly, a bypass board module, a capacitor assembly, a main control system assembly, a rear panel and a rear cover; the base body, the front panel, the rear panel and the rear cover form a shell, and the radiator assembly and the capacitor assembly are arranged in the shell; the capacitor assembly is arranged below the radiator assembly, and the bypass plate module is connected with the radiator assembly;

2. The high protection level H-bridge high-voltage frequency converter power unit of claim 1, characterized in that: the unit incoming line is connected with the rectifier diode through the incoming line busbar and is positioned on the front panel together with the outgoing line busbar, and the inlet and outlet of the incoming and outgoing line busbar are sealed by the insulating outlet sealing plate, so that the integral IP protection level of the unit is improved.

3. The high protection level H-bridge high-voltage frequency converter power unit of claim 1, characterized in that: the capacitor assembly comprises a capacitor mounting plate, a plurality of capacitors are mounted in the capacitor mounting plate through an upper mounting lantern ring and a lower mounting lantern ring, the capacitors are connected to be a capacitor bank through a first connecting row and a second connecting row, a negative electrode of the capacitor bank and a positive electrode of the capacitor bank are arranged, a voltage-sharing resistor is connected between the positive electrode and the negative electrode of each capacitor, and the capacitor assembly further comprises a capacitor cover plate used for sealing the capacitors.

4. The high protection level H-bridge high-voltage frequency converter power unit of claim 1, characterized in that: the capacitor assembly is positioned right below the radiator assembly, and the respective radiating air channels are mutually independent.

5. The high protection level H-bridge high-voltage frequency converter power unit of claim 1, characterized in that: the main control system assembly is arranged on the right side of the radiator assembly through a bracket.

6. The high protection level H-bridge high-voltage frequency converter power unit of claim 1, characterized in that: the capacitor assembly is connected with the front panel through a rivet nut and a rivet.