CN100426626C - Brushless non-core motor - Google Patents

Abstract

The invention relates to a brushless and iron-coreless motor. It is characterized in that: the metal outer ring (1) is connected to the motor casing (4), which is a part of the motor casing (4); the permanent magnet (2) is connected to the ferrous motor casing (4); (3) is an iron-free The core wire is wound around the stator; (5) is the fixed shaft of the motor, on which the stator (3) is fixedly connected; (6) is the power output joint connected with the motor casing (4); (7) is the bearing, which is fixed on the motor The fixed shaft (5) supports the rotation of the motor casing (4); (8) is the motor mounting bracket, and it can choose different forms according to the actual application; (9) is the internal heat removal hole of the motor; (10) is the external cold air Enter the through hole inside the motor; (11) is the lead-out wire of the coil winding, which is drawn from the fixed shaft (5) of the motor and connected with the power supply.

Description

A brushless iron-core motor

technical field

The invention belongs to the field of motors, and relates to a motor, in particular to a brushless iron-coreless permanent disk motor.

Background technique

Existing traditional motors have large copper loss and iron loss, which greatly affects the improvement of motor efficiency, and also causes excessive heat generation of the motor, which in turn affects its reliability.

Contents of the invention

In order to overcome the above-mentioned shortcomings of the existing traditional motors, the present invention provides a brushless iron-coreless motor. The motor has no iron core, and the internal resistance of the stator coil is designed to be extremely small. Therefore, the motor not only has high efficiency, but also, Very low heat generation. The motor has simple structure and good heat balance condition, and is especially suitable for manufacturing high-efficiency motors.

The technical solution adopted by the present invention to solve its technical problems is:

The stator coil is closely connected with the metal fixed shaft of the motor, thereby greatly increasing the heat capacity of the stator coil; and the heat of the coil is dissipated through the ventilation and cooling holes on the exposed motor metal shell. The ventilation and cooling holes are divided into air inlet and outlet. The air hole, the air inlet hole is located on the metal shell of the motor close to the fixed axis of the motor, and the air outlet hole is located on the metal shell of the motor far away from the fixed axis of the motor. These measures can greatly increase the power density of the motor.

There is an outer rotor of the motor outside the stator connected with the metal fixed shaft of the motor. The outer rotor is made of ferromagnetic material. Several pairs of permanent magnets are fixed on the inner axial end surface of the outer rotor. They are attracted by each other and supported by the fixed shaft of the stepped motor. And maintain a proper air gap with the stator coil. The stator is a coil-wound coreless structure, which drives the motor casing supported on the fixed shaft of the motor to rotate and output power when energized.

The beneficial effects of the present invention are:

1) There is no iron core, so there is no iron loss.

2) The internal resistance of the disc stator coil is extremely low, so the heat generation is small.

3) The double-sided yoke can collect magnetism through the ferrous motor shell, which improves the utilization rate of magnetic energy.

4) High motor efficiency.

5) The output torque is large.

6) No cogging effect.

7) The speed is stable.

Description of drawings

The specific structural features of the present invention will be further described below in conjunction with the drawings and embodiments of the description.

Fig. 1 is an overall assembly diagram of the brushless iron-core motor of the present invention.

Fig. 2 is a schematic diagram of the stator of the brushless iron-core motor of the present invention.

Fig. 3 is a schematic diagram of the rotor of the brushless iron-core motor of the present invention.

Detailed ways

In Fig. 1, the metal outer ring 1 is connected with the motor casing 4, which is a part of the motor casing 4, and it plays the role of adjusting and connecting the motor casing; the permanent magnet 2 is connected on the ferrous motor casing 4; the stator 3 generates the The required rotating magnetic field; the motor housing 4 rotates under the action of the rotating magnetic field of the stator 3; the stator 3 is fixedly connected to the motor fixed shaft 5; the power output joint 6 is connected to the motor housing 4; the bearing 7 is fixed on the motor fixed shaft 5 and support the rotation of the motor housing 4; the fixed shaft 5 of the motor is supported on the motor bracket 8, and the motor bracket 8 can be selected in different forms according to the actual application; the lead wire 11 of the coil winding will be connected to the power supply; The outermost edge of the casing 4 allows the hot air inside the motor to be discharged through it; the through hole 10 through which external cold air enters the inside of the motor is located on the side of the motor casing 4 and is close to the fixed shaft 5 of the motor.

In Fig. 2, the stator 3 is composed of a coil winding 12 and a thermosetting material body 13, and the coil winding 12 is cured in the thermosetting material body 13; the lead wire 11 of the coil winding is connected to the coil winding 12. The coil winding 12 is composed of three coils 14, 15, 16, which are continuous S-shaped, and the number of crests is the same as the number of permanent magnets; the three coils 14, 15, 16 are sequentially staggered at an angle of 360 degrees/number of permanent magnets/3 For example, when the number of permanent magnets is 8, the three coils 14, 15, 16 are sequentially staggered by an angle of 15 degrees.

In Fig. 3, the permanent magnet 2 is fixed on the motor housing 4; the N and S poles of the permanent magnet are distributed alternately; the number of the permanent magnet is a multiple of 4, such as 4, 6, 8, 10, 12, etc.; the shape of the permanent magnet is a rhombus.

The working principle of this embodiment is as shown in Figures 1 to 3, the stator coil winding 12 is powered by the power supply or the driver of the motor through the lead wire 11 to form a rotating magnetic field, which acts on the permanent magnets 2 on both sides, making it Drive the motor casing 4 and the power output joint 6 to rotate, and output the power of the motor.

Claims (3)

1. A brushless iron-coreless motor, characterized in that: the motor fixed shaft (5) is supported on the motor support (8), and the motor casing (4) is supported on the motor fixed shaft (5) by bearings (7); The motor casing (4) is made of ferrous material, and several pairs of permanent magnets (2) are fixed on the inner axial ends of the motor casing (4), and the stator (3) is in the middle of the permanent magnet (2), and the stator ( 3) Fixed on the fixed shaft (5) of the motor; the metal outer ring (1) is connected with the motor casing (4), and the metal outer ring (1) is a part of the motor casing (4); The fixed shaft (5) is drawn out and connected to the power supply; the heat removal hole (9) inside the motor is located at the outermost edge of the motor casing (4); the through hole (10) through which the external cold air enters the inside of the motor is located at the ferrous motor casing (4 ) on the part parallel to the fixed axis (5) of the motor. 2. A brushless iron-coreless motor according to claim 1, characterized in that: its stator (3) is composed of a coil winding (12) and a thermosetting material body (13), and the coil winding (12) is solidified on In the thermosetting material body (13); the coil winding (12) is made up of three coils, and the three coils are continuous S-shaped, and the number of crests is the same as the number of permanent magnets; the staggered angle of the three coils is 360 degrees divided by The number of permanent magnets is divided by 3. 3. A brushless iron-coreless motor according to claim 1, characterized in that: the number of permanent magnets is a multiple of 4; the shape of the permanent magnets is rhombus.

Images