Direct-current brushless explosion-proof motor with built-in driver

Abstract

The utility model discloses a driver built-in DC brushless explosion-proof motor, comprising a stator and a rotor which are arranged based on a housing, the housing comprises an explosion-proof housing, and a front end cover and a rear end cover which are packaged on the front end and the rear end of the explosion-proof housing; the stator is arranged at the lower part in the explosion-proof shell, the rotor is arranged in the stator, and the sensor is arranged on the rotor between the stator and the rear end cover; an integrated driving plate is arranged at the upper part in the explosion-proof shell; the rear end cover is provided with an anti-explosion cable gland which is aligned between the integrated driving board and the stator. The power line, a control line of the integrated driving board and a signal line of the sensor are led out of the machine shell through the anti-explosion cable gland. According to the structure of the utility model, the integrated driving board is installed inside the casing to form a whole, so that external wiring is reduced, the failure rate caused by poor connection or cable damage is reduced, the structure is simple, the number of parts is small, the processing amount is small, the installation complexity is low, the cost is reduced, and the reliability of products is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to motor technology, concretely is a kind of built-in type direct current brushless explosion-proof motor of driver. BACKGROUND

[0002] Permanent magnet brushless explosion-proof motor is a kind of motor type combined with permanent magnet material and brushless technology, is specially designed to meet the high efficiency and safe operation needs in flammable and explosive environment;The structure of permanent magnet brushless explosion-proof motor mainly includes rotor made of high-performance permanent magnet material, stator formed by multiphase winding and sensor for detecting rotor polarity and matching driver.

[0003] The driver is constituted by power electronic device and integrated circuit etc., and its function is: receiving motor start, stop, brake signal to control motor start, stop and brake;Receiving position sensor signal and positive, reverse signal to control the on-off of each power tube of inverter bridge, produce continuous torque;Receiving speed instruction and speed feedback signal to control and adjust speed;Provide protection and display etc.

[0004] For simultaneously controlling multiple motors, in order to realize accurate speed and torque control, complex drive control system needs to be used.This not only increases the cost of system, but also can introduce additional fault point;In addition, the existence of driver can cause electromagnetic interference problem, especially in industrial environment, which needs to be solved by special design measures.

[0005] The existing direct current brushless explosion-proof motor usually adopts separate driver design, which leads to complex wiring, higher failure rate and poor electromagnetic compatibility;In addition, separate design also increases the overall size of system and installation complexity.In limited installation space or special environment (such as explosion-proof, waterproof, etc.), it may still be difficult to meet the requirements. UTILITY MODEL CONTENTS

[0006] In view of the deficiencies of prior art, the utility model provides a built-in type direct current brushless explosion-proof motor of driver integrated with motor main body and driver.

[0007] The built-in type direct current brushless explosion-proof motor capable of solving the problems of prior art has the technical scheme comprising stator and rotor arranged based on casing, and the difference is that:

[0008] 1、The casing comprises explosion-proof shell and front end cover and rear end cover packaged on the front and rear ports of explosion-proof shell.

[0009] 2、The stator is arranged in the lower part of explosion-proof shell, and the rotor is arranged in the stator, and the sensor is installed on the rotor between the stator and rear end cover.

[0010] 3. The upper part of the explosion-proof shell is provided with an integrated drive board.

[0011] 4. The rear end cover is provided with an explosion-proof gland between the integrated drive board and the stator, and the power line, the control line of the integrated drive board and the signal line of the sensor are led out of the shell through the explosion-proof gland.

[0012] Further, the ports of the explosion-proof shell include upper and lower round holes, and matching upper and lower circular tables are protruded on the inner end faces of the end covers opposite to the upper and lower round holes.

[0013] Further, the upper circular table I of the front end cover is provided with a front notch, the upper circular table II of the rear end cover is provided with a rear notch, and the front and rear ends of the integrated drive board are positioned and installed in the front notch and the rear notch.

[0014] Further, the lower circular table I of the front end cover is provided with a front bearing hole, the lower circular table II of the rear end cover is provided with a rear bearing hole, the rotating shaft of the rotor is installed in the front bearing hole and the rear bearing hole through the front bearing and the rear bearing, and the rotating shaft is led out of the shell through the front bearing hole.

[0015] The utility model discloses a drive built-in type direct current brushless explosion-proof motor has the advantages and beneficial effects that:

[0016] 1. In the structure of the drive built-in type direct current brushless explosion-proof motor, the integrated drive board and the motor main body are integrated together to form a whole through the integrated structure design, so that the external wiring is reduced, the failure rate caused by poor connection or cable damage is reduced, the structure is simple, the number of parts is small, the processing amount is small, the installation complexity is low, the fault diagnosis and maintenance frequency are reduced, the downtime and maintenance cost are reduced, the error rate and manufacturing cost are reduced, and the reliability of the product is improved.

[0017] 2. The structure design of the utility model meets the explosion-proof requirements of international and national standards, can safely operate in a flammable and explosive environment, the motor protection level reaches IP65, the sealing design and the explosion-proof shell effectively prevent flame propagation and dust from entering, and the overall safety is improved.

[0018] 3. The integrated design of the structure of the utility model can better shield electromagnetic interference, and further improve the overall electromagnetic compatibility of the system. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a structure schematic view of an embodiment of the utility model.

[0020] Figure 2 It is Figure 1 It is an isometric view of the front end cover in the embodiment.

[0021] Figure 3 It is Figure 1Axonometric view of the rear end cover in an embodiment.

[0022] Figure number identification: 1. Explosion-proof housing; 2. Front cover; 2-1. Upper table I; 2-2. Front notch; 2-3. Lower table I; 2-4. Front bearing hole; 3. Rear cover; 3-1. Upper table II; 3-2. Rear notch; 3-3. Lower table II; 3-4. Rear bearing hole; 3-5. Threaded hole; 4. Rotor; 4-1. Rotating shaft; 5. Integrated drive board; 5-1. Drive interface; 6. Explosion-proof cable gland; 7. Stator; 8. Front bearing; 9. Rear bearing; 10. Sensor. DETAILED DESCRIPTION

[0023] The technical solution of the present utility model will be further described below with reference to the embodiments shown in the accompanying drawings.

[0024] The utility model discloses a brushless DC explosion-proof motor with a built-in driver, comprising a casing, a rotor 4, a stator 7 and an integrated drive board 5.

[0025] The housing includes a square explosion-proof shell 1, the interior of which is divided into an upper space and a lower space. Upper and lower circular holes are provided on the front and rear end surfaces of the explosion-proof shell 1, and the upper and lower circular holes correspond to the upper and lower spaces inside the explosion-proof shell 1 respectively; a front cover 2 and a rear cover 3 are provided corresponding to the front and rear end surfaces of the explosion-proof shell 1, respectively. Figure 1 、 Figure 2 、 Figure 3 shown.

[0026] The rear end surface of the square plate body of the front end cover 2 is protruded with an upper and lower round platform Ⅰ2-1 and a lower round platform Ⅰ2-3. The upper round platform Ⅰ2-1 is centrally provided with a left and right front notch 2-2. The lower round platform Ⅰ2-3 is coaxially provided with a through front countersunk hole, a front bearing hole 2-4 and an axis hole. The front bearing hole 2-4 is provided with a front bearing 8. Figure 1 、 Figure 2 shown.

[0027] The front end surface of the square plate body of the rear end cover 3 is protruded with upper and lower upper round platforms II 3-1 and lower round platforms II 3-3. The upper round platform II 3-1 is centrally provided with left and right rear notches 3-2. A through threaded hole 3-5 is provided on the rear end cover 3 below the rear notch 3-2. A rear countersunk hole and a rear bearing hole 3-4 are coaxially provided on the lower round platform II 3-3. A rear bearing 9 is installed in the rear bearing hole 3-4. Figure 1 、 Figure 3 shown.

[0028] The front end cover 2 is fixed on the front end face of the explosion-proof housing 1 by screwing after being sealed by the upper and lower circular cones Ⅰ2-1 and Ⅱ2-3 and the corresponding upper and lower circular holes. Figure 1 、 Figure 2 、 Figure 3 as shown.

[0029] The stator 7 is fixedly installed in the lower space inside the explosion-proof housing 1, the rotor 4 is coaxially arranged in the stator 7, the rotating shaft 4-1 of the rotor 4 is installed on the front end cover 2 and the rear end cover 3 through the front bearing 8 and the rear bearing 9, the front end of the rotating shaft 4-1 extends out of the shell from the shaft hole of the front end cover 2, and the sensor 10 (preferably a Hall element) installed on the rotor 4 is arranged between the stator 7 and the lower circular cone Ⅱ3-3 of the rear end cover 3. Figure 1 as shown.

[0030] The integrated drive board 5 is arranged in the upper space inside the explosion-proof housing 1, the front and rear ends of the integrated drive board 5 are clamped in the front and rear grooves 2-2 and 3-2 of the front and rear end covers 2 and 3 respectively to fix the position, and the drive interface 5-1 is arranged at the bottom of the integrated drive board 5. Figure 1 as shown.

[0031] The explosion-proof gland nut 6 is screwed and tightened in the threaded hole 3-5 of the rear end cover 3, the power supply line, the control line connected with the drive interface 5-1 and the signal line of the sensor 10 are all led out of the shell through the explosion-proof gland nut 6. Figure 1 as shown.

[0032] The lower part of the rear end cover 3 is screwed with a bolt for grounding the shell.

Claims

1. A brushless DC explosion-proof motor with a built-in driver, comprising a stator (7) and a rotor (4) arranged on a housing, characterized in that: The housing comprises an explosion-proof housing (1) and a front cover (2) and a rear cover (3) encapsulated on the front and rear ports of the explosion-proof housing (1); The stator (7) is arranged at the lower part of the explosion-proof housing (1), the rotor (4) is arranged in the stator (7), and the sensor (10) is installed on the rotor (4) between the stator (7) and the rear end cover (3); An integrated drive plate (5) is provided in the upper portion of the explosion-proof housing (1); The rear end cover (3) is provided with an explosion-proof gland (6) positioned between the integrated drive board (5) and the stator (7); the power line, the control line of the integrated drive board (5), and the signal line of the sensor (10) are all led out of the casing through the explosion-proof gland (6).

2. The driver-built-in brushless DC explosion-proof motor according to claim 1, characterized in that: The port of the explosion-proof housing (1) comprises upper and lower circular holes, and matching upper and lower circular platforms are protruded from the inner end surfaces of each end cover opposite to the upper and lower circular holes.

3. The driver-built-in brushless DC explosion-proof motor according to claim 2, characterized in that: A front notch (2-2) is provided on the upper circular platform I (2-1) of the front end cover (2); A rear notch (3-2) is provided on the upper truncated platform II (3-1) of the rear end cover (3); The front and rear ends of the integrated drive plate (5) are positioned and installed in the front notch (2-2) and the rear notch (3-2).

4. The driver-built-in brushless DC explosion-proof motor according to claim 2, characterized in that: A front bearing hole (2-4) is provided on the lower circular platform I (2-3) of the front end cover (2); A rear bearing hole (3-4) is provided on the lower truncated platform II (3-3) of the rear end cover (3); The rotating shaft (4-1) of the rotor (4) is mounted on the front bearing hole (2-4) and the rear bearing hole (3-4) through the front bearing (8) and the rear bearing (9), and the rotating shaft extends out of the casing through the front bearing hole (2-4).

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