CN205141934U - Novel integral type inverter motor - Google Patents

Abstract

A novel integrated frequency conversion motor relates to a frequency conversion motor. The traditional separate system of variable frequency motor and variable frequency drive has high cost and poor working reliability. The utility model includes a motor and a frequency converter, and is characterized in that the frequency converter is arranged on the upper part of the motor, the frequency converter includes a lower shell of the frequency converter, an upper cover of the frequency converter located above the lower shell of the frequency converter, the lower shell of the frequency converter and the frequency converter The upper cover is matched to form the frequency converter cavity, and the bottom of the frequency converter is equipped with a junction box; the power cable is connected to the frequency converter cavity through the inner cavity of the junction box, and a plurality of cooling fins are arranged at the lower end of the lower shell of the frequency converter, and the cooling fins are arranged axially. An air duct is formed between adjacent cooling fins, and a heat dissipation fan is arranged inside the rear end cover of the motor; the lower casing of the frequency converter is integrated with the motor casing or connected through a connecting piece. The motor and the frequency converter of the technical solution are integrated, and the heat dissipation problem of the motor and the frequency converter is solved by using the fan at the tail of the motor, and the cost is low and the operation is reliable.

Description

New integrated frequency conversion motor

technical field

The utility model relates to a frequency conversion motor.

Background technique

In the traditional variable frequency motor and variable frequency drive separation system, due to the uncertainty of the combination of the motor and the drive, more user parameter settings are generally considered in the drive design, such as motor parameter settings, low-speed voltage boost, etc. For users, To make good use of the variable frequency system and give full play to the best operating performance of the variable frequency system, it is obviously difficult to perform such professional but essential parameter setting work; the traditional variable frequency motor and variable frequency drive separate system between the motor and the controller It needs to use longer cables and more plug-ins for connection, which will not only increase the cost, but also the exposed plug-ins of the cable box are susceptible to wear and water corrosion, resulting in a high failure rate; since the motor and variable frequency drive are power devices, their Problems such as self-loss and heat generation, large structural volume, cooling and heat dissipation have become technical difficulties in the integrated design of the motor and variable frequency drive.

Utility model content

The technical problem to be solved and the technical task proposed by the utility model are to perfect and improve the existing technical solutions and provide a new type of integrated frequency conversion motor to achieve the goals of stable operation, convenient installation and maintenance, and cost reduction. For this reason, the utility model takes the following technical solutions.

A new type of integrated frequency conversion motor, including a motor and a frequency converter, is characterized in that: the frequency converter is arranged on the upper part of the motor, and the frequency converter includes a lower shell of the frequency converter, and an upper cover of the frequency converter located above the lower shell of the frequency converter , the lower case of the frequency converter is matched with the upper cover of the frequency converter to form a frequency converter cavity, and a junction box is provided at the bottom of the frequency converter; the power cable is connected to the cavity of the frequency converter through the inner cavity of the junction box, and the lower case of the frequency converter is The lower end of the body is provided with a plurality of cooling fins, and the cooling fins are axially arranged, and air ducts are formed between adjacent cooling fins. The rear end cover of the motor is provided with a cooling fan, and the wind blown by the cooling fan passes through the air duct to dissipate heat for the inverter; The lower casing of the frequency converter is integrated with the motor casing or connected through connecting pieces. In this technical solution, the motor and the frequency converter are set together to form an integrated variable frequency motor. The cooling of the frequency converter is carried out by air cooling through the cooling fan installed on the rear end cover of the motor. The heat dissipation of the frequency converter is solved, and the heat dissipation is good and the work is reliable. Good performance, because there is no need to add other cooling equipment, the cost of the frequency conversion motor is low, the product quality is improved, and the installation and maintenance are convenient. The frequency converter is installed on the upper part of the motor, which effectively shortens the length of the connecting wire of the control circuit and does not require an external control cabinet; a sealing ring is installed at the connection part between the motor and the frequency converter to achieve dustproof and waterproof effects; the frequency conversion motor integrated with the motor and frequency converter Structure, using the fan at the tail of the motor for heat dissipation solves the heat dissipation problem of the motor and frequency converter.

As a further improvement and supplement to the above technical solution, the utility model also includes the following additional technical features.

The lower case of the frequency converter and the motor case are split structures; the lower case of the frequency converter is fixed on the motor junction box and the rear end cover of the motor through screws, and the gap between the frequency converter and the junction box is A junction box sealing ring is provided, and an O-shaped sealing ring is provided at the fixing screw between the frequency converter and the rear end cover of the motor.

A plurality of cooling fins are arranged to form an upward concave arc shape matching the outer circumference of the motor casing; the cooling fins are arranged on one side of the lower end of the lower casing of the inverter, and the other side of the lower end of the lower casing of the inverter matches the upper end of the junction box .

A casing sealing ring is provided between the lower casing of the inverter and the upper cover of the inverter, and the lower casing of the inverter is located on the inner side of the sealing ring of the casing, and a limit strip is arranged along the circumference. The side is provided with a power cord waterproof connector, a first aviation waterproof connector, a second aviation waterproof connector and a third aviation waterproof connector. Realize the strong waterproof and dustproof effect of the inverter.

The inverter is equipped with an operation panel, and the inverter is provided with an RS485 interface and/or a Bluetooth module. The operation panel can conveniently debug the parameters of the inverter, and the wired communication can be easily realized through the RS485 interface and the dedicated communication cable. The optional Bluetooth module can enable it to communicate wirelessly through smart terminals such as mobile phones.

The junction box sealing ring is consistent with the rectangular shape of the junction box, and the junction box sealing ring is provided with a U-shaped avoidance structure at the screw fixing place between the junction box and the lower casing of the frequency converter. Better waterproof and dustproof.

The sealing ring of the junction box has four U-shaped avoidance structures, all of which are located at the positions of the four screw fixing holes of the junction box, and are symmetrically arranged. Make the fixed connection between the inverter and the junction box stable and balanced.

The frequency converter and the rear end cover of the motor are fixed by a plurality of symmetrically arranged screws, and each screw is fixed with an O-ring. Better sealing effect.

The heat sink and the lower case of the frequency converter have an integrated structure. It is convenient to manufacture and reduces the process cost.

The motor is a three-phase asynchronous motor. Meet the IEC60034-30IE2 efficiency index.

Beneficial effects: the structural design of the variable frequency motor integrating the motor and the frequency converter reduces the cable connection and improves the insulation effect. The frequency converter can use the motor fan to dissipate heat and improve the working stability of the frequency converter. Working environment, the whole machine is small, easy to install and maintain, improve the stability of motor operation, and reduce costs.

Description of drawings

Fig. 1 is the structural representation of the utility model.

Fig. 2 is a schematic view of the blasting of the utility model.

Fig. 3 is a schematic diagram of placing the sealing ring of the junction box of the present invention.

Fig. 4 is a schematic diagram of the structure of the lower case of the frequency converter of the present invention.

In the figure: 1-motor; 2-inverter; 3-O-shaped sealing ring; 4-inverter lower shell; 5-inverter upper cover; 6-housing sealing ring; 7-junction box sealing ring; 8- Control module; 9-power line waterproof connector; 10-first aviation waterproof connector; 11-second aviation waterproof connector; 12-third aviation waterproof connector; 13-junction box; 14-U-shaped avoidance structure; 15-screw fixing Hole; 16-radiating fin; 17-limiting bar; 18-motor housing; 19-motor rear end cover.

detailed description

The technical solution of the utility model is described in further detail below in conjunction with the accompanying drawings of the description.

As shown in Figures 1-4, the utility model includes a high-efficiency three-phase asynchronous motor 1 and a frequency converter 2 that meet the efficiency index of IEC60034-30IE2.

In order to realize the integrated structural design of the motor 1 and the frequency converter 2, the frequency converter 2 is arranged on the upper part of the motor 1, and the frequency converter 2 includes a lower case 4 of the frequency converter, and a frequency conversion device located above the lower case 4 of the frequency converter. The upper cover 5 of the inverter, the control module 8 arranged inside the lower casing 4 of the frequency converter, the power module, and the reactor and other electronic power devices. The power cable of the motor 1 is connected to the inside of the lower casing 4 of the inverter through the inner cavity of the junction box 13 inside the motor 1, and the lower casing 4 of the inverter is fixed on the junction box 13 of the motor and the rear end cover 19 of the motor by screws .

In order to realize the dustproof and waterproof requirements of IP65, a junction box sealing ring 7 is arranged between the frequency converter 2 and the junction box 13. The junction box sealing ring 7 is consistent with the rectangular shape of the junction box 13, and the junction box sealing ring 7. There are four U-shaped avoidance structures 14 at the screw fixing places between the junction box 13 and the lower casing 4 of the frequency converter, all of which are located at the positions of the four screw fixing holes 15 of the junction box 13, and are symmetrically arranged; the frequency converter 2 and the rear end cover 19 of the motor are fixed by two symmetrically arranged screws, and an O-shaped sealing ring 3 is provided at each screw fixing place; A casing sealing ring 6 is provided, and the lower casing 4 of the frequency converter is located on the inner side of the casing sealing ring 6 and is provided with a limit bar 17 along the circumference. An aviation waterproof connector 10 , a second aviation waterproof connector 11 and a third aviation waterproof connector 12 are used to input the three-phase AC power into the inverter 2 through the power cord waterproof connector 9 . The signal input line is connected to the inside of the frequency converter 2 through the first aviation waterproof connector 10, and the second aviation waterproof connector 11 is used to connect the operation panel for debugging. The output shaft of the motor 1 is extended from the front end of the motor 1 for connecting the load.

In order to facilitate heat dissipation, the side of the lower case 4 of the frequency converter facing the motor 1 is provided with multiple rows of rib-shaped cooling fins 16, the cooling fins 16 and the lower case 4 of the frequency converter are in an integrated structure, and the rear end of the motor A cooling fan is arranged inside the cover 19 , and the section of the heat sink 16 in contact with the motor housing 18 has a concave arc shape in cross-section, matching the outer circle shape of the motor housing 18 .

In order to facilitate setting of frequency converter parameters and facilitate communication, the frequency converter 2 is equipped with an operation panel, and the frequency converter 2 is provided with an RS485 interface and/or a Bluetooth module.

The integrated frequency conversion motor shown in this example is to install the intelligent frequency converter on the upper part of the asynchronous motor, thereby effectively shortening the length of the connecting wire of the control circuit, and does not need an external control cabinet. The sealing ring achieves the effect of dustproof and waterproof, and the fan at the end of the motor is used for heat dissipation to solve the heat dissipation problem of the motor and frequency converter. It has high reliability and small overall volume, which provides certain convenience for maintenance and installation and reduces the cost.

The new integrated frequency conversion motor shown in Figures 1-4 above is a specific embodiment of the utility model, which has already reflected the substantive features and progress of the utility model, and can be used according to actual needs under the inspiration of the utility model. The equivalent modification of its shape, structure and other aspects are all within the scope of protection of this scheme.

Claims (10)

1. A new type of integrated frequency conversion motor, including a motor (1) and a frequency converter (2), characterized in that: the frequency converter (2) is set on the upper part of the motor (1), and the frequency converter (2) includes a frequency conversion The lower case (4) of the inverter, the upper cover (5) of the inverter located above the lower case (4) of the inverter, the lower case (4) of the inverter is matched with the upper cover (5) of the inverter to form an inverter Cavity, the bottom of the frequency converter (2) is provided with a junction box (13); the power cable is connected to the cavity of the frequency converter through the inner cavity of the junction box (13), and the lower end of the lower shell of the frequency converter (4) is provided with a plurality of Radiating fins (16), the cooling fins (16) are axially arranged, and air passages are formed between adjacent cooling fins (16). The rear end cover (19) of the motor is provided with a cooling fan inside, and the wind blown by the cooling fan passes through the air The channel is for the inverter to dissipate heat; the lower casing (4) of the inverter and the motor casing are integrally structured or connected through connecting pieces. 2. The novel integrated frequency conversion motor according to claim 1, characterized in that: the lower housing of the frequency converter (4) and the motor housing are split structures; the lower housing of the frequency converter (4) ) are fixed on the motor junction box (13) and the motor rear end cover (19) by screws, a junction box sealing ring (7) is arranged between the inverter (2) and the junction box (13), and the inverter ( 2) An O-ring seal (3) is provided at the fixing screw between the motor rear end cover (19). 3. The new integrated frequency conversion motor according to claim 1, characterized in that: a plurality of cooling fins (16) are arranged to form an upwardly concave arc shape matching the outer circumference of the motor housing (18); the cooling fins (16) is arranged on one side of the lower end of the inverter lower casing (4), and the other side of the lower end of the inverter lower casing (4) is matched with the upper end of the junction box (13). 4. The new integrated frequency conversion motor according to claim 1, characterized in that: a housing sealing ring (6) is arranged between the lower housing (4) of the frequency converter and the upper cover (5) of the frequency converter, The lower casing of the inverter (4) is located on the inner side of the sealing ring (6) of the casing and is provided with a limit strip (17) along the circumference, and the side of the lower casing of the inverter (4) is provided with a power cord waterproof connector (9) , the first aviation waterproof joint (10), the second aviation waterproof joint (11) and the third aviation waterproof joint (12). 5. The new integrated frequency conversion motor according to claim 1, characterized in that: the frequency converter (2) is equipped with an operation panel, and the frequency converter (2) is equipped with an RS485 interface and/or a Bluetooth module . 6. The new integrated frequency conversion motor according to claim 2, characterized in that: the junction box sealing ring (7) is consistent with the rectangular shape of the junction box (13), and the junction box sealing ring (7) is in the junction box (13) is provided with a U-shaped avoidance structure (14) at the place where the screw is fixed to the lower casing of the frequency converter (4). 7. The new integrated frequency conversion motor according to claim 6, characterized in that: the junction box sealing ring (7) has 4 U-shaped avoidance structures (14), all of which are located in the 4 junction boxes (13). The screw fixing holes (15) are symmetrically arranged. 8. The new integrated frequency conversion motor according to claim 2, characterized in that: the frequency converter (2) and the motor rear end cover (19) are fixed by a plurality of symmetrically arranged screws, and each screw is fixed An O-ring seal (3) is provided at each place. 9. The novel integrated frequency conversion motor according to claim 1, characterized in that: the heat sink (16) and the lower case (4) of the frequency converter are of an integrated structure. 10. The novel integrated frequency conversion motor according to claim 1, characterized in that: the motor (1) is a three-phase asynchronous motor.