CN111262419B - Overcurrent protection device for frequency converter - Google Patents

Overcurrent protection device for frequency converter Download PDF

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Publication number
CN111262419B
CN111262419B CN202010178580.9A CN202010178580A CN111262419B CN 111262419 B CN111262419 B CN 111262419B CN 202010178580 A CN202010178580 A CN 202010178580A CN 111262419 B CN111262419 B CN 111262419B
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Prior art keywords
frequency converter
box
buffer
longitudinal
protection device
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CN202010178580.9A
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Chinese (zh)
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CN111262419A (en
Inventor
夏守先
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Guangzhou Longyue Electric Technology Co ltd
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Guangzhou Longyue Electric Technology Co ltd
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    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02MAPPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00Details of apparatus for conversion
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16FSPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F15/00Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
    • F16F15/02Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
    • F16F15/04Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means
    • F16F15/06Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means with metal springs
    • F16F15/067Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means with metal springs using only wound springs
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05KPRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K7/00Constructional details common to different types of electric apparatus
    • H05K7/20Modifications to facilitate cooling, ventilating, or heating
    • H05K7/2089Modifications to facilitate cooling, ventilating, or heating for power electronics, e.g. for inverters for controlling motor
    • H05K7/20909Forced ventilation, e.g. on heat dissipaters coupled to components
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05KPRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K7/00Constructional details common to different types of electric apparatus
    • H05K7/20Modifications to facilitate cooling, ventilating, or heating
    • H05K7/2089Modifications to facilitate cooling, ventilating, or heating for power electronics, e.g. for inverters for controlling motor
    • H05K7/20927Liquid coolant without phase change

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  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Acoustics & Sound (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Cooling Or The Like Of Electrical Apparatus (AREA)
  • Rectifiers (AREA)

Abstract

The invention discloses a frequency converter overcurrent protection device which comprises a frequency converter box body, wherein a partition plate is arranged in the frequency converter box body and divides the frequency converter box body into a working cavity and a heat dissipation cavity, a buffering symmetrical inclined rod is arranged at the bottom of the frequency converter box body, the bottom end of the buffering symmetrical inclined rod is connected with a transverse buffer block, the transverse buffer block is arranged in a sliding mode with a buffer groove arranged on a buffer plate, and the transverse buffer block is connected with the buffer groove through a transverse buffer spring. According to the invention, the S-shaped circulating radiating pipe can absorb heat generated by the working cavity, and meanwhile, the heat is dissipated through the heat dissipation heat conduction block on the liquid guide pipe, so that the liquid of the S-shaped circulating radiating pipe is cooled, and the heat dissipation effect is improved.

Description

Overcurrent protection device for frequency converter
Technical Field
The invention relates to the technical field of frequency converters, in particular to a frequency converter overcurrent protection device.
Background
The frequency converter is a power control device which controls the alternating current motor by changing the frequency of a working power supply of the motor by applying a frequency conversion technology and a microelectronic technology. The frequency converter mainly comprises a rectifying unit, a filtering unit, an inversion unit, a braking unit, a driving unit, a detecting unit micro-processing unit and the like. The frequency converter is used for adjusting the voltage and frequency of the output power supply by switching on and off the internal IGBT, and providing the required power supply voltage according to the actual requirement of the motor, so as to achieve the purposes of energy saving and speed regulation. Along with the continuous improvement of the industrial automation degree, the frequency converter is also widely applied.
The frequency converter overcurrent protection device and the frequency converter in the prior art are arranged outdoors for a long time, and the service life of the frequency converter overcurrent protection device and the frequency converter is influenced outdoors due to a large amount of dust, and meanwhile, the service life of the frequency converter overcurrent protection device and the frequency converter are further influenced due to poor heat dissipation effect.
Disclosure of Invention
The invention aims to provide an overcurrent protection device for a frequency converter, which is used for solving the problems in the background technology.
In order to achieve the above purpose, the present invention provides the following technical solutions:
the frequency converter overcurrent protection device comprises a frequency converter box body, wherein a partition plate is arranged in the frequency converter box body, the frequency converter box body is partitioned into a working cavity and a heat dissipation cavity by the partition plate, a buffering symmetrical inclined rod is arranged at the bottom of the frequency converter box body, the bottom end of the buffering symmetrical inclined rod is connected with a transverse buffer block, the transverse buffer block is arranged in a sliding manner with a buffer groove arranged on a buffer plate, the transverse buffer block is connected with the buffer groove through a transverse buffer spring, and the bottom end of the buffer plate is connected with a bottom plate through a longitudinal buffer mechanism; a vent is formed in one side of the frequency converter box body, a dust-proof box is detachably arranged outside the vent, the dust-proof box is connected with a clamping block, a clamping groove is formed in the frequency converter box body, the clamping block is clamped with the clamping groove, and a dust-proof opening is formed in the dust-proof box; the frequency converter is characterized in that a limiting plate is symmetrically arranged on one side of the frequency converter box body, a limiting rod is arranged on the dustproof box and is matched with an opposite-impact mechanism arranged on the frequency converter box body, and the limiting plate is also provided with a fixing mechanism;
the cooling cavity is internally provided with an S-shaped circulating cooling pipe, one end of the S-shaped circulating cooling pipe is communicated with the liquid guide pipe, the other end of the S-shaped circulating cooling pipe is communicated with the liquid inlet pipe, the liquid inlet pipe is communicated with the cooling liquid tank through the circulating pump, and the liquid guide pipe is communicated with the liquid inlet of the cooling liquid tank.
Preferably, the longitudinal buffer mechanism comprises a longitudinal sleeve, a longitudinal block is slidably arranged in the longitudinal sleeve, the bottom end of the longitudinal block is connected with a buffer column, the buffer column is connected with the bottom plate, and the longitudinal block is connected with the inner top wall of the longitudinal sleeve through a longitudinal spring.
Preferably, the opposite-impact mechanism comprises opposite-impact plates, and the opposite-impact plates are connected with the frequency converter box body through symmetrical springs.
Preferably, the fixing mechanism comprises a fixing frame, the fixing frame is connected with the frequency converter box body, a drawing fixing rod is arranged on the fixing frame in a drawing mode, the drawing fixing rod is matched with the limiting rod, a reset spring is sleeved on the drawing fixing rod, the bottom end of the reset spring is connected with the fixing frame, and the top end of the reset spring is connected with the limiting plate.
Preferably, the bottom end of the drawing fixing rod is connected with a drawing block.
Preferably, the liquid guide tube is arranged in a protection box, a protection opening is formed in the outer side of the protection box, and a flow increasing mechanism is arranged on the protection box.
Preferably, the liquid guide tube and the protection box are internally provided with heat dissipation and heat conduction blocks.
Preferably, the flow increasing mechanism comprises a flow increasing motor, an output shaft of the flow increasing motor is connected with a longitudinal flow increasing shaft, a driving wheel is arranged outside the protection box and connected with a driven wheel through a belt, the driven wheel is connected with a power shaft, the bottom end of the power shaft is connected with a first bevel gear, the first bevel gear is meshed with a second bevel gear, and the second bevel gear is connected with a transverse flow increasing shaft.
Preferably, the protection box is provided with a reinforcing column, and the power shaft passes through the reinforcing column.
Preferably, the longitudinal flow increasing shaft and the transverse flow increasing shaft are respectively provided with a disturbance helical blade in the protection box.
Compared with the prior art, the invention has the beneficial effects that:
(1) The S-shaped circulating radiating pipe can absorb heat generated by the working cavity, and meanwhile, the heat is dissipated through the radiating heat conducting block on the liquid guide pipe, so that the liquid of the S-shaped circulating radiating pipe is cooled, and the radiating effect is improved; the flow increasing motor is started, the longitudinal flow increasing shaft rotates, the driving wheel is connected with the driven wheel through a belt, the driven wheel rotates, the power shaft is driven to rotate, the transverse flow increasing shaft rotates through the engagement of the first bevel gear and the second bevel gear, the disturbance helical blade is driven to rotate, the flow velocity in the protection box is improved, the replacement of outside air and air in the protection box is accelerated, and the heat dissipation of the heat dissipation and conduction block is accelerated.
(2) Through the cooperation setting of buffering symmetry dead lever, horizontal buffer block, can realize horizontal buffering to the converter box, through vertical spring compression and reset, the longitudinal block moves to the diapire in the vertical sleeve to accomplish the vertical buffering of converter box, improved the protection effect of converter box.
(3) Through the setting of dustproof box, can play the radiating effect, can prevent dust through the dustproof mouth again, set up through fixture block and draw-in groove joint simultaneously to fix dustproof box convenient to detach, through gag lever post extrusion reset spring, reset spring resets, thereby the cooperation pull dead lever is fixed the gag lever post, and is further fixed dustproof box, has improved the firm effect of installation of dustproof box.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a schematic diagram of the horizontal and vertical buffering principle of the inverter case of the present invention;
FIG. 3 is a schematic view of a buffer mechanism according to the present invention;
FIG. 4 is an enlarged schematic view of the structure of FIG. 1A according to the present invention;
FIG. 5 is a schematic diagram of the principle and structure of heat absorption of the S-shaped circulating radiating tube;
fig. 6 is a schematic structural diagram of the flow increasing mechanism of the present invention.
In the figure: 1. a frequency converter box; 2. a partition plate; 3. a working chamber; 4. a heat dissipation cavity; 5. buffering symmetrical diagonal rods; 6. a lateral buffer block; 7. a buffer plate; 8. a buffer tank; 9. a buffer mechanism; 91. a longitudinal sleeve; 92. a longitudinal block; 93. a buffer column; 94. a longitudinal spring; 10. a bottom plate; 11. a transverse buffer spring; 12. a vent; 13. a dust-proof box; 14. a clamping block; 15. a clamping groove; 16. a dust-proof port; 17. a limiting plate; 18. a limit rod; 19. a hedging mechanism; 191. a butt plate; 192. a symmetrical spring; 20. a fixing mechanism; 201. a fixing frame; 202. drawing a fixing rod; 203. a return spring; 204. a drawing block; 21. s-shaped circulating radiating pipes; 22. a catheter; 23. a liquid inlet pipe; 24. a circulation pump; 25. a cooling liquid tank; 26. a protection box; 27. a protective port; 28. a heat dissipation and conduction block; 29. a flow increasing mechanism; 291. a current increasing motor; 292. a longitudinal flow increasing shaft; 293. a driving wheel; 294. a belt; 295. a power shaft; 296. a first bevel gear; 297. a second bevel gear; 298. a transverse flow increasing shaft; 299. driven wheel; 2910. a reinforcing column; 2911. the helical blade is disturbed.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1-6, in the invention, an overcurrent protection device for a frequency converter comprises a frequency converter box body 1, wherein a partition board 2 is arranged in the frequency converter box body 1, the partition board 2 partitions the frequency converter box body 1 into a working cavity 3 and a heat dissipation cavity 4, a buffering symmetrical inclined rod 5 is arranged at the bottom of the frequency converter box body 1, the bottom end of the buffering symmetrical inclined rod 5 is connected with a transverse buffer block 6, the transverse buffer block 6 is slidably arranged with a buffer groove 8 arranged on a buffer plate 7, the transverse buffer block 6 is connected with the buffer groove 8 through a transverse buffer spring 11, and the bottom end of the buffer plate 7 is connected with a bottom plate 10 through a longitudinal buffer mechanism 9; a vent 12 is formed in one side of the frequency converter box body 1, a dustproof box 13 is detachably arranged outside the vent 12, the dustproof box 13 is connected with a clamping block 14, a clamping groove 15 is formed in the frequency converter box body 1, the clamping block 14 is clamped with the clamping groove 15, and a dustproof port 16 is formed in the dustproof box 13; a limiting plate 17 is symmetrically arranged on one side of the frequency converter box body 1, a limiting rod 18 is arranged on the dustproof box 13, the limiting rod 18 is matched with a hedging mechanism 19 arranged on the frequency converter box body 1, and the limiting plate 17 is also provided with a fixing mechanism 20;
an S-shaped circulating radiating pipe 21 is arranged in the radiating cavity 4, one end of the S-shaped circulating radiating pipe 21 is communicated with a liquid guide pipe 22, the other end of the S-shaped circulating radiating pipe is communicated with a liquid inlet pipe 23, the liquid inlet pipe 23 is communicated with a cooling liquid tank 25 through a circulating pump 24, and the liquid guide pipe 22 is communicated with a liquid inlet of the cooling liquid tank 25;
the longitudinal buffer mechanism 9 of the embodiment comprises a longitudinal sleeve 91, a longitudinal block 92 is arranged in the longitudinal sleeve 91 in a sliding manner, a buffer column 93 is connected to the bottom end of the longitudinal block 92, the buffer column 93 is connected with the bottom plate 10, and the longitudinal block 92 is connected with the inner top wall of the longitudinal sleeve 91 through a longitudinal spring 94;
through the cooperation setting of the buffering symmetrical inclined rod 5 and the transverse buffer block 6, the transverse buffering of the frequency converter box body 1 can be realized, the longitudinal spring 94 is used for compressing and resetting, and the longitudinal block 92 moves towards the inner bottom wall of the longitudinal sleeve 91, so that the longitudinal buffering of the frequency converter box body 1 is completed, and the protection effect of the frequency converter box body 1 is improved;
the opposite-impact mechanism 19 of the present embodiment includes an opposite-impact plate 191, and the opposite-impact plate 191 is connected to the inverter case 1 through a symmetrical spring 192.
The fixing mechanism 20 of this embodiment includes a fixing frame 201, the fixing frame 201 is connected with the frequency converter box 1, a pull fixing rod 202 is provided on the fixing frame 201 in a pull manner, the pull fixing rod 202 is matched with the limit rod 18, a reset spring 203 is sleeved on the pull fixing rod 202, the bottom end of the reset spring 203 is connected with the fixing frame 201, and the top end is connected with the limit plate 17.
The bottom end of the drawing fixing rod 202 is connected with a drawing block 204;
through the setting of dustproof box 13, can play the radiating effect, can prevent dust through dustproof mouth 16 again, set up through fixture block 14 and draw-in groove 15 joint simultaneously to be convenient for dismantle fixedly with dustproof box 13, extrude reset spring 203 through gag lever post 18 simultaneously, reset spring 203 resets, thereby cooperation pull dead lever 202 is fixed gag lever post 18, and is further fixed with dustproof box 13, has improved the firm effect of installation of dustproof box 13.
The catheter 22 of the present embodiment is disposed in a protection box 26, a protection opening 27 is formed on the outer side of the protection box 26, and a flow increasing mechanism 29 is disposed on the protection box 26.
The catheter 22 and the protective case 26 of the present embodiment are provided with heat dissipation and conduction blocks 28.
The flow increasing mechanism 29 of the embodiment comprises a flow increasing motor 291, wherein an output shaft of the flow increasing motor 291 is connected with a longitudinal flow increasing shaft 292, the longitudinal flow increasing shaft 292 is arranged outside the protection box 26, the driving wheel 293 is connected with a driven wheel 299 through a belt 294, the driven wheel 299 is connected with a power shaft 295, the bottom end of the power shaft 295 is connected with a first bevel gear 296, the first bevel gear 296 is meshed with a second bevel gear 297, and the second bevel gear 297 is connected with a transverse flow increasing shaft 298;
the protection box 26 of the embodiment is provided with a reinforcing column 2910, and the power shaft 295 passes through the reinforcing column 2910;
the longitudinal flow increasing shaft 292 and the transverse flow increasing shaft 298 of the embodiment are respectively provided with a disturbance helical blade 2911 in the protection box 26;
the S-shaped circulating radiating pipe 21 can absorb heat generated by the working cavity 3, and meanwhile, the heat is dissipated through the heat dissipation heat conduction block 28 on the liquid guide pipe 22, so that the liquid of the S-shaped circulating radiating pipe 21 is cooled, and the heat dissipation effect is improved; the current increasing motor 291 is started, the longitudinal current increasing shaft 292 rotates, the driving wheel 293 is connected with the driven wheel 299 through the belt 294, the driven wheel 299 rotates, the power shaft 295 is driven to rotate, the first bevel gear 296 and the second bevel gear 297 are meshed, the transverse current increasing shaft 298 rotates, the disturbance helical blade 2911 is driven to rotate, the flow rate in the protection box 26 is improved, the replacement of external air and air in the protection box 26 is accelerated, and the heat dissipation of the heat dissipation and conduction block 28 is accelerated.
The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.

Claims (10)

1. The utility model provides a converter overcurrent protection device, includes converter box (1), its characterized in that, be equipped with baffle (2) in converter box (1), baffle (2) separate into working chamber (3) and heat dissipation chamber (4) with converter box (1), converter box (1) bottom is equipped with buffering symmetry diagonal bar (5), buffering symmetry diagonal bar (5) bottom is connected with horizontal buffer block (6), horizontal buffer block (6) and buffer groove (8) sliding arrangement that are equipped with on buffer plate (7), horizontal buffer block (6) are connected through horizontal buffer spring (11) with buffer groove (8), buffer plate (7) bottom is connected through vertical buffer mechanism (9) with bottom plate (10); a vent (12) is formed in one side of the frequency converter box body (1), a dust-proof box (13) is detachably arranged outside the vent (12), the dust-proof box (13) is connected with a clamping block (14), a clamping groove (15) is formed in the frequency converter box body (1), the clamping block (14) is clamped with the clamping groove (15), and a dust-proof opening (16) is formed in the dust-proof box (13); a limiting plate (17) is symmetrically arranged on one side of the frequency converter box body (1), a limiting rod (18) is arranged on the dustproof box (13), the limiting rod (18) is matched with a hedging mechanism (19) arranged on the frequency converter box body (1), and the limiting plate (17) is also provided with a fixing mechanism (20);
be equipped with S type circulation cooling tube (21) in heat dissipation chamber (4), S type circulation cooling tube (21) one end and catheter (22) intercommunication, the other end and feed liquor pipe (23) intercommunication, feed liquor pipe (23) are through circulating pump (24) and cooling liquid case (25) intercommunication, and catheter (22) and cooling liquid case (25) inlet intercommunication.
2. The overcurrent protection device for the frequency converter according to claim 1, wherein the longitudinal buffer mechanism (9) comprises a longitudinal sleeve (91), a longitudinal block (92) is arranged in the longitudinal sleeve (91) in a sliding mode, a buffer column (93) is connected to the bottom end of the longitudinal block (92), the buffer column (93) is connected with the bottom plate (10), and the longitudinal block (92) is connected with the inner top wall of the longitudinal sleeve (91) through a longitudinal spring (94).
3. A frequency converter overcurrent protection device according to claim 1, characterized in that the counter-impact mechanism (19) comprises a counter-impact plate (191), the counter-impact plate (191) being connected to the frequency converter housing (1) by means of symmetrical springs (192).
4. The overcurrent protection device for the frequency converter according to claim 1, wherein the fixing mechanism (20) comprises a fixing frame (201), the fixing frame (201) is connected with the frequency converter box body (1), a drawing fixing rod (202) is arranged on the fixing frame (201) in a drawing mode, the drawing fixing rod (202) is matched with the limiting rod (18), a reset spring (203) is sleeved on the drawing fixing rod (202), the bottom end of the reset spring (203) is connected with the fixing frame (201), and the top end of the reset spring is connected with the limiting plate (17).
5. The overcurrent protection device for the frequency converter according to claim 4, wherein the bottom end of the pull fixing rod (202) is connected with a pull block (204).
6. The overcurrent protection device for the frequency converter according to claim 1, wherein the liquid guide tube (22) is arranged in a protection box (26), a protection opening (27) is formed in the outer side of the protection box (26), and a current increasing mechanism (29) is arranged on the protection box (26).
7. The overcurrent protection device for the frequency converter according to claim 6, wherein the liquid guide tube (22) and the protection box (26) are internally provided with heat dissipation and heat conduction blocks (28).
8. The overcurrent protection device for the frequency converter according to claim 6, wherein the current increasing mechanism (29) comprises a current increasing motor (291), an output shaft of the current increasing motor (291) is connected with a longitudinal current increasing shaft (292), the longitudinal current increasing shaft (292) is arranged outside the protection box (26), the driving wheel (293) is connected with a driven wheel (299) through a belt (294), the driven wheel (299) is connected with a power shaft (295), the bottom end of the power shaft (295) is connected with a first bevel gear (296), the first bevel gear (296) is meshed with a second bevel gear (297), and the second bevel gear (297) is connected with a transverse current increasing shaft (298).
9. The overcurrent protection device for the frequency converter according to claim 8, wherein the protection box (26) is provided with a reinforcing column (2910), and the power shaft (295) is arranged through the reinforcing column (2910).
10. The overcurrent protection device for the frequency converter according to claim 8, wherein the longitudinal flow-increasing shaft (292) and the transverse flow-increasing shaft (298) are provided with disturbance helical blades (2911) in the protection box (26).
CN202010178580.9A 2020-03-14 2020-03-14 Overcurrent protection device for frequency converter Active CN111262419B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010178580.9A CN111262419B (en) 2020-03-14 2020-03-14 Overcurrent protection device for frequency converter

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Application Number Priority Date Filing Date Title
CN202010178580.9A CN111262419B (en) 2020-03-14 2020-03-14 Overcurrent protection device for frequency converter

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CN111262419A CN111262419A (en) 2020-06-09
CN111262419B true CN111262419B (en) 2023-05-12

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Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112026507B (en) * 2020-08-31 2021-08-17 吉林大学 Engine-driven automobile with cooling and heat dissipation functions
CN112314556A (en) * 2020-11-27 2021-02-05 德清蓝祥科技发展有限公司 Pole setting formula insecticidal lamp of convenient regulation

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016192160A1 (en) * 2015-05-29 2016-12-08 广东美的制冷设备有限公司 Device and method for protecting voltage surge of pec circuit in variable-frequency household electric apparatus
CN109067298A (en) * 2018-07-24 2018-12-21 巢湖市金辉自控设备有限公司 A kind of dustproof heat radiator of frequency converter
CN208386424U (en) * 2018-07-09 2019-01-15 广州市龙玥电气科技有限公司 A kind of protective device of frequency converter
CN209823628U (en) * 2019-04-19 2019-12-20 四川伊贝斯特科技有限公司 Frequency converter capable of preventing water permeation

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016192160A1 (en) * 2015-05-29 2016-12-08 广东美的制冷设备有限公司 Device and method for protecting voltage surge of pec circuit in variable-frequency household electric apparatus
CN208386424U (en) * 2018-07-09 2019-01-15 广州市龙玥电气科技有限公司 A kind of protective device of frequency converter
CN109067298A (en) * 2018-07-24 2018-12-21 巢湖市金辉自控设备有限公司 A kind of dustproof heat radiator of frequency converter
CN209823628U (en) * 2019-04-19 2019-12-20 四川伊贝斯特科技有限公司 Frequency converter capable of preventing water permeation

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Address after: No. 101, No. 84, Huifu West Road, Yuexiu District, Guangzhou, Guangdong 510000

Patentee after: Guangzhou Longyue Electric Technology Co.,Ltd.

Address before: No. 101, No. 84, Huifu West Road, Yuexiu District, Guangzhou, Guangdong 510000

Patentee before: GUANGZHOU LONGYUE ELECTRIC TECHNOLOGY Co.,Ltd.