CN107517013A - a drive - Google Patents

Abstract

The invention discloses a driver, which comprises a frame shell, in which a control circuit board, a power supply system, a heat dissipation air duct, a main power conversion device and a main power printed circuit board are installed, and one end of the frame shell is installed with a The heat dissipation fan, power system and control circuit board are installed in the upper area of the rack shell, the main power conversion device and the main power printed circuit board are installed in the lower right area of the rack shell, and the cooling air duct is installed in the lower left of the rack shell Side area, the above three areas divide the driver into three parts as a whole. Since the heat dissipation air duct located in the lower left area is adjacent to the upper area that generates heat and the lower right area, only one heat dissipation fan is needed to realize The overall effective cooling of the drive also effectively isolates the pollutants in the wind from the control circuit and related power devices.

Description

a drive

technical field

The invention relates to an electric energy control device, in particular to a driver.

Background technique

Drivers mainly include electrical devices that are conventionally called frequency converters, servo drives, inverters, motor speed controllers, etc. on the market and use power electronics technology. Usually, such products consume heat due to the need for AC-DC conversion of electric energy, accounting for about 2-5% of the rated power of the whole machine; at the same time, there is also loss and heat generation of the main power conversion device and related control circuit devices, which account for about 0.5-1% of the rated power of the whole machine. Therefore, measures for heat dissipation are required. Considering the cost and For reliability, low-voltage products usually adopt air cooling. The dust accumulation caused by the air-cooling method may cause corrosion, pressure drop, condensation, breakdown and sparking to the control circuit PCBA and the power devices soldered on it, and may even eventually cause the whole machine to fail. . This problem has always existed, and the reliability guarantee of the product is greatly reduced, especially in applications with relatively harsh environments, such as steel, chemical industry, and metal processing.

In the prior art, a heat dissipation air duct is usually designed in the driver to cool the above-mentioned radiator, while the loss and heat generation of the main power conversion device and the loss and heat generation of related control circuit devices usually adopt natural cooling or forced air cooling, and the temperature of the control circuit when natural cooling is adopted Relatively high, which seriously affects the reliability and life of electronic components. When forced air cooling is used, it is difficult to deal with the negative secondary effects of dust and sundries being brought in by the wind on the impact and the aggravation of condensation water. Therefore, it is necessary to provide a A driver with good reliability guarantee and excellent heat dissipation effect.

Contents of the invention

The main purpose of the present invention is to solve the technical problems of poor heat dissipation reliability in the existing driver and the dust and debris brought in by the cooling wind will have a negative impact on the control circuit PCBA and the power devices welded thereon.

In order to solve the above technical problems, the present invention provides a driver, including a frame housing, in which a control circuit board, a power supply system, a cooling air duct, a main power conversion device and a main power printed circuit board are installed. A cooling fan is installed at one end of the rack housing, the power supply system and the control circuit board are installed in the upper area of the rack housing, and the main power conversion device and the main power printed circuit board are installed In the lower right area of the frame housing, the cooling air duct is installed in the lower left area of the rack housing.

Optionally, an inverted L-shaped partition wall is provided inside the rack housing to isolate the upper area, the lower right area, and the lower left area to form an upper installation room, a lower right installation room, and a lower left installation room. room.

Optionally, the partition wall is made of a plastic shell or a metal shell.

Optionally, the partition wall is a solid plate.

Optionally, the partition wall is provided with several cooling holes, and the total area of the cooling holes is less than 50% of the total area of the partition wall.

Optionally, the heat dissipation air duct is an L-shaped structure that is repeatedly arranged and stacked.

After adopting the driver provided by the present invention, since the power supply system and the control circuit board are installed in the upper area of the frame shell, the main power conversion device and the main power printed circuit board are installed in the lower right area of the frame shell, the heat dissipation air duct Installed in the lower left area of the rack housing, the driver is structurally divided into three parts, namely the upper area, the lower right area and the lower left area. Due to the cooling air duct located in the lower left area and the upper area that generates heat It is adjacent to the lower right area respectively, so only one heat dissipation fan is needed to realize the effective cooling of the driver as a whole, and at the same time effectively isolate the pollutants in the wind from the control circuit and related power devices; further, in The frame housing is provided with an inverted L-shaped partition wall for isolating the upper area, the lower right area, and the lower left area to form an upper installation room, a lower right installation room, and a lower left installation room. The inverted L-shaped partition wall can As the main frame of the driver, it is used to support and assemble the various components. At the same time, it can be used to isolate the cooling air in the cooling air duct from direct contact with the control circuit board and the main power printed circuit board. The L partition wall can also play the role of heat transfer.

Description of drawings

The accompanying drawings are used to provide a further understanding of the present invention, and constitute a part of the description, and are used to explain the present invention together with the following specific embodiments, but should not constitute a limitation of the present invention. In the accompanying drawings:

FIG. 1 is a schematic diagram of the external structure of a driver according to an embodiment of the present invention;

Fig. 2 is a structural sectional view of the driver of the embodiment of the present invention;

3 is an exploded schematic diagram of the overall structure of the driver according to the embodiment of the present invention;

detailed description

Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to illustrate and explain the present invention, not to limit the present invention.

As shown in Fig. 1, Fig. 2 and Fig. 3, a driver 100 provided by the present invention includes a frame housing 110 in which a control circuit board 120, a power supply system 130, a heat dissipation air duct 140, a main The power conversion device 150 and the main power printed circuit board 160, a heat dissipation fan 170 is installed at one end of the frame housing 110, wherein the heat dissipation air duct 140 is an L-shaped structure that is repeatedly arranged and stacked, and the power supply system 130 and the control circuit board 120 are installed on the In the upper area of the rack housing 110, the main power conversion device 150 and the main power printed circuit board 160 are installed in the lower right area of the rack housing 110, and the cooling air duct 140 is installed in the lower left area of the rack housing 110 , the frame shell 110 is provided with an inverted L-shaped partition wall 111, which isolates the upper area, the lower right area, and the lower left area to form an upper installation chamber 112, a lower right installation chamber 113, and a lower left installation chamber 114.

In addition, for those skilled in the art, the inverted L-shaped partition wall 111 in this embodiment is a plastic shell or a metal shell. Similarly, the inverted L-shaped partition wall 111 can adopt a solid plate structure, or can In order to ensure the isolation effect of the plate-shaped structure with several cooling holes, the total area of the cooling holes is less than 50% of the total area of the inverted L-shaped partition wall.

After the driver 100 provided by the present invention is adopted, since the power supply system 130 and the control circuit board 120 are installed in the upper area of the frame housing 110, the main main power conversion device 150 and the main power printed circuit board 160 are installed in the frame housing. 110, the cooling air duct 140 is installed in the lower left area of the rack housing 110, and structurally divides the driver 100 into three parts, namely, the upper area, the lower right area, and the lower left area. The heat dissipation air channel 140 in the lower left area is adjacent to the upper area and the lower right area that generate heat, respectively, so only one heat dissipation fan 170 is needed to achieve effective cooling of the driver 100 as a whole, and at the same time effectively dissipate the heat in the wind. Pollutants and control circuits and related power devices are isolated; further, an inverted L-shaped partition wall 111 is provided in the frame housing 110 to isolate the upper area, the lower right area and the lower left area, forming The upper installation chamber 112, the lower right installation chamber 113, and the lower left installation chamber 114. The inverted L-shaped partition wall 111 can be used as the main frame of the driver to support and assemble the various components, and can be used to isolate the cooling air in the cooling air duct 140 from the The control circuit board 120 and the main power printed circuit board 160 are in direct contact, and the inverted L partition wall 111 can also play the role of heat transfer. Specifically, the circuit boards in the upper installation chamber 112 and the lower right installation chamber 113 and their The larger continuous heat produced by the soldered electronic device will heat the air in the upper and right chambers, and this part of the air will heat the inverted L-shaped partition wall 111. The other side of the inverted L-shaped partition wall 111 is for heat dissipation. On the side wall of the air duct 140 , the cooling air will continuously blow through the side wall of the heat dissipation air duct 140 to take away heat, and then play a role in cooling the upper installation chamber 112 and the right installation chamber 113 .

The embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. For those skilled in the art, without departing from the principle and spirit of the present invention, various modifications, substitutions and variations can be made to these embodiments, which still fall within the protection scope of the present invention.

Claims (6)

1. a kind of driver, including frame housing, control board, power-supply system, radiation air are installed in the frame housing Road, main power conversion device and main power printed circuit board, described frame housing one end are provided with cooling fan, and its feature exists In the power-supply system and the control board are installed on the frame housing internal upper part region, the main power inverter Part and the main power printed circuit board are installed on bottom right side region in the frame housing, and the heat dissipation wind channel is installed on described Lower-left side region in frame housing.

2. driver according to claim 1, it is characterised in that inverted L shape dividing wall is provided with the frame housing, with Room, bottom right installation room and lower-left are installed for the upper area, bottom right side region and lower left side zone isolation to be opened, in formation Room is installed.

3. driver according to claim 2, it is characterised in that the dividing wall is by plastic casing or metal shell.

4. driver according to claim 3, it is characterised in that the dividing wall is solid slab.

5. driver according to claim 3, it is characterised in that the dividing wall is provided with some heat emission holes, described to dissipate The hot hole gross area is less than the 50% of the dividing wall gross area.

6. driver according to claim 1, driver, it is characterised in that the heat dissipation wind channel stacks for repeated arrangement L-type structure.