Insulated sealing device and method of variable-frequency drive
A technology of insulation sealing and frequency converter, which is applied in the direction of output power conversion devices, sealed casings, electrical components, etc., can solve the problems of poor sealing effect of external electrolytic capacitors, complicated parts processing technology, high maintenance cost, etc., and achieve good insulation and sealing , not easy to wear, fixed and firm effect
Pending Publication Date: 2018-02-23
BEIJING DINGHAN TECH GRP CO LTD
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[0006] The purpose of the present invention is to propose an insulating and sealing device and method for frequency converters, which can solve the problems of poor sealing effect of external electrolytic capacitors of frequency converters, complicated parts processing technology and high maintenance costs in the prior art
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[0038] The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and through specific implementation methods.
[0039] see figure 1 and figure 2 The free end of the electrolytic capacitor 2 and the radiator are placed outside the inverter housing 1 of this embodiment, and the radiator is arranged on one side of the electrolytic capacitor 2 to dissipate heat for high-power components in the inverter. During the working process of the radiator, hot air will be generated, and dust will also be deposited. The electrolytic capacitor 2 is installed near the heat sink, which is equivalent to being installed near the dusty environment. The dust in the local air can fall into the inside of the inverter housing 1 through the gap between the electrolytic capacitor 2 and the inverter housing 1, thereby affecting Normal operation of the inverter.
[0040] In view of this, this embodiment discloses an insulating and se...
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The invention discloses an insulated sealing device of a variable-frequency drive. The device comprises a variable-frequency drive shell, electrolytic capacitors, sealing rings, a pressing plate and fastening parts, wherein first capacitor via holes are formed in the variable-frequency drive shell, the free ends of the electrolytic capacitors are located outside the variable-frequency drive shelland sleeved with the sealing rings, second capacitor via holes are formed in the pressing plate, the free ends extend out of the second capacitor via holes, and the pressing plate is connected with the sealing rings in an abutting mode and fixed onto the variable-frequency drive shell by the fastening parts. The invention further discloses an insulated sealing method. The method comprises the steps that the free ends are sleeved with the sealing rings, and the sealing rings abut against the tops of the first capacitor via holes; the free ends penetrate the second capacitor via holes in the pressing board, so that the pressing board is connected with the sealing rings in an abutting mode; by means of the fastening parts, the pressing plate is fixed onto the variable-frequency drive shell. According to the device and the method, the pressing board can closely press the sealing rings, and through elastic deformation of the sealing rings, gaps among the electrolytic capacitors, the variable-frequency drive shell and the pressing plate are filled, so that a sealing effect is achieved.
Description
technical field [0001] The invention relates to the field of sealing technology, in particular to an insulating and sealing device and method for frequency converters. Background technique [0002] Most of the electrolytic capacitors installed on the existing electronic equipment, such as frequency converters, are exposed in the air duct. During use, corrosive gas, water vapor, dust, etc. will enter the device through the gap between the electrolytic capacitor and the electronic device casing, causing the circuit board and electronic devices inside the device to be corroded, or dust to accumulate between the devices. Arcing phenomenon or short circuit occurs, which greatly affects the performance of electronic equipment and drastically reduces its life. [0003] At present, there are two insulation and sealing methods for external electrolytic capacitors in inverters. The first method is to place electrolytic capacitors in the air duct and use glue potting to seal the elect...
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IPC IPC(8): H02M1/00H05K5/02H05K5/06
CPCH02M1/00H05K5/0213H05K5/061H02M1/0003
Inventor 肖迎亮
Owner BEIJING DINGHAN TECH GRP CO LTD
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