CN105337441A - Ultrathin brushless direct current motor - Google Patents

Abstract

The invention discloses an ultrathin brushless direct current motor which mainly comprises front and rear bearing motor shells, a hand wheel with fan blades, a special waveform elastic gasket for a bearing, a first O-shaped sealing ring, a framework, a motor mounting plate, a rotor assembly and a flange assembly, wherein the front and rear bearing motor shells are provided with a plurality of fan blades; the rotor assembly is arranged at the front end of the flange assembly; the motor mounting plate is arranged at the front end of the rotor assembly; the framework is arranged at the front end of the motor mounting plate; the front bearing motor shell and the rear bearing motor shell are arranged at the front end of the framework; the hand wheel with the fan blades is arranged at the front end of the front bearing motor shell and the rear bearing motor shell. The invention reduces the design of the motor and makes the motor thinner, thereby saving more energy. Because the volume is small, the loss is less. So that the movement process is more stable.

Description

An ultra-thin brushless DC motor

technical field

The invention relates to a DC motor, in particular to an ultra-thin brushless DC motor.

Background technique

The current DC motor will generate the third harmonic in the process of operation. Among the industrial and domestic electric loads, resistive and inductive loads occupy a large proportion. For resistive loads, the reactive power consumed occupies a high proportion of the reactive power provided by the power system. Resistive load must absorb reactive power to work normally, which is determined by its own nature.

Non-linear devices such as power electronic devices also consume reactive power, especially various phase control devices. Such as phase-controlled rectifiers, phase-controlled AC power adjustment circuits and cycloconverters, the fundamental wave current lags behind the grid voltage during operation, and consumes a large amount of reactive power. In addition, these devices will also generate a large amount of harmonic current, and harmonic sources consume reactive power. The increasingly widespread application of power electronic devices also makes power electronic devices the largest source of harmonics. The diode rectifier circuit with capacitor filtering on the DC side is also a severe source of harmonic pollution. The phase of the fundamental component of the input current of this circuit is roughly the same as that of the power supply voltage, so the fundamental power factor is close to 1.

(3) The magnet will produce hysteresis and eddy current loss.

The influence of the third harmonic to produce undesirable phenomena:

It causes serious pollution to the power grid, and also makes the total power factor very low;

Harmonics can cause partial parallel resonance or series resonance in the power system, which will amplify the harmonic content and cause equipment such as capacitors to burn out;

Harmonics can also cause relay protection and automatic devices to malfunction, causing confusion in electric energy measurement;

For the outside of the power system, harmonics will cause serious interference to communication equipment and electronic equipment;

Harmonics reduce the efficiency of production, transmission and utilization of electric energy, cause electrical equipment to overheat, generate vibration and noise, and age insulation, shorten service life, and even malfunction or burn out;

The magnetic field of the magnet increases the torque when the direct drive servo motor GMD1 turns the handwheel.

Contents of the invention

Aiming at the above problems, the present invention provides an ultra-thin brushless DC motor.

The technical scheme adopted in the present invention is: an ultra-thin brushless DC motor, mainly including front and rear bearing motor housings, handwheels with fan blades, special waveform elastic gaskets for bearings, first O-shaped sealing rings, skeletons, and motor mounting plates , the rotor assembly and the flange assembly; the rotor assembly is arranged at the front end of the flange assembly; the motor mounting plate is arranged at the front end of the rotor assembly; the skeleton is arranged at the front end of the motor mounting plate; the front and rear bearing motor casings are arranged At the front end of the frame; the hand wheel with fan blades is arranged at the front end of the front and rear bearing motor housings.

Further, the rotor assembly includes a second bearing, a rotor core, an elastic pin, a magnetic steel, a rotor silicon steel sheet, a first bearing, a wave-opening washer, and a shaft snap ring; the rotor core is arranged at the front end of the second bearing; The elastic pin is arranged at the front end of the rotor core; the magnetic steel is arranged at the front end of the elastic pin; the protective magnetic steel is arranged on the rotor silicon steel sheet; the first bearing is arranged at the front end of the rotor silicon steel sheet; The washer is arranged at the front end of the first bearing; the snap ring for the shaft is arranged at the front end of the wave-opening washer.

Furthermore, the flange assembly includes a fanless flange, a flange spacer and a hexagon socket screw; the flange spacer is arranged on the front end of the fanless flange; the hexagon socket screw fixes the fanless flange and flange spacers.

Advantages of the present invention:

The invention makes the design of the motor smaller and thinner, making it more energy-saving. Due to the small size, the loss is less. Make it more stable during exercise.

In addition to the objects, features and advantages described above, the present invention has other objects, features and advantages. Hereinafter, the present invention will be described in further detail with reference to the drawings.

Description of drawings

The accompanying drawings constituting a part of this application are used to provide further understanding of the present invention, and the schematic embodiments and descriptions of the present invention are used to explain the present invention, and do not constitute an improper limitation of the present invention.

Fig. 1 is the overall structural representation of the present invention;

Fig. 2 is a schematic structural view of the rotor assembly of the present invention;

Fig. 3 is a schematic structural view of the flange assembly of the present invention.

Reference signs:

1 is the stator silicon steel sheet, 2 is the wire guard, 3 is the skeleton, 4 is the front and rear bearing motor housing, 5 is the Hall plate, 6 is the locking plate, 7 is the cross pan head screw, 8 is the cross countersunk head screw, 9 is the first protective coil, 10 is the second protective coil, 11 is the hand wheel with fan blade, 12 is the hexagon socket set screw, 13 is the strong magnet, 14 is the special wave elastic gasket for bearing, 15 is the second O shape Seal ring, 16 is the first O-ring seal, 17 is the first hexagon socket cap screw, 18 is the motor mounting plate, 19 is the rotor assembly, 20 is the flange assembly, 21 is the third O-ring seal, 22 is The second hexagon socket head screw, 23 is the rotor silicon steel sheet, 24 is the magnetic steel, 25 is the rotor core, 26 is the wave washer, 27 is the shaft snap ring, 28 is the elastic pin, 29 is the first bearing, 30 is The second bearing, 31 is a fanless flange, 32 is a flange spacer and 33 is a hexagon socket screw.

detailed description

In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

Referring to Fig. 1 to Fig. 3, an ultra-thin brushless DC motor as shown in Fig. An O-ring seal 16, skeleton 3, motor mounting plate 18, rotor assembly 19 and flange assembly 20; the rotor assembly 19 is arranged on the front end of the flange assembly 20; the motor mounting plate 18 is arranged on the rotor assembly 19 The front end; the skeleton 3 is arranged at the front end of the motor mounting plate 18; the front and rear bearing motor casings 4 are arranged at the front end of the skeleton 3;

The rotor assembly 19 includes a second bearing 30, a rotor core 25, an elastic pin 28, a magnetic steel 24, a rotor silicon steel sheet 23, a first bearing 29, a corrugated washer 26 and a shaft snap ring 27; the rotor core 25 is provided with At the front end of the second bearing 30; the elastic pin 28 is arranged at the front end of the rotor core 25; the magnetic steel 24 is arranged at the front end of the elastic pin 28; the protective magnetic steel 24 is arranged on the rotor silicon steel sheet 23; The first bearing 29 is arranged at the front end of the rotor silicon steel sheet 23 ; the wave-opening washer 26 is arranged at the front end of the first bearing 29 ; the shaft snap ring 27 is arranged at the front end of the wave-opening washer 26 .

The flange assembly 20 includes a bladeless flange 31, a flange spacer 32 and a hexagon socket screw 33; the flange spacer 32 is arranged on the front end of the bladeless flange 31; the hexagon socket screw 33 is fixed No blade flange 31 and flange spacer 32.

The overall structure of the ultra-thin brushless DC motor includes:

Stator silicon steel sheet 1, wire guard 2, skeleton 3, front and rear bearing motor housing 4, Hall plate 5, locking plate 6, cross pan head screw 7, cross countersunk head screw 8, first guard coil 9, second Protective coil 10, handwheel with vane 11, hexagon socket set screw 12, strong magnet 13, wave elastic gasket for bearing 14, second O-ring seal 15, first O-ring seal 16, first hexagon socket Cylindrical head screw 17 , motor mounting plate 18 , rotor assembly 19 , flange assembly 20 , third O-ring seal 21 and second hexagon socket head cap screw 22 .

The silicon steel sheet of the present invention adds 12 deep arc grooves with a width of 1.5mm.

Baichuan direct drive servo motor GMD1 is a Y-type resistance-inductive connection with four pairs of poles. It is composed of rotor magnets and 12 silicon steel sheets.

The temperature rise of Baichuan direct drive servo motor GMD1 is reduced by 20.8,

When the Baichuan direct drive servo motor GMD1 turns the handwheel, the torque decreases,

The main reason for the above reduction is to eliminate the generation of the third harmonic, reduce the hysteresis and eddy current loss, and make the magnetic field between the motors symmetrical when they are working.

The invention makes the design of the motor smaller and thinner, making it more energy-saving. Due to the small size, the loss is less. Make it more stable during exercise.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection of the present invention. within range.

Claims (3)

1. An ultra-thin brushless DC motor, characterized in that it mainly includes front and rear bearing motor housings (4), handwheel with fan blades (11), wave elastic gasket for bearings (14), first O-ring (16), skeleton (3), motor mounting plate (18), rotor assembly (19) and the flange assembly (20); the rotor assembly (19) is arranged at the front end of the flange assembly (20); the motor mounting plate (18) is arranged at the front end of the rotor assembly (19); the skeleton (3) It is arranged at the front end of the motor mounting plate (18); the front and rear bearing motor casings (4) are arranged at the front end of the skeleton (3); the hand wheel with fan blades (11) is arranged at the front end of the front and rear bearing motor casings (4). 2. The ultra-thin brushless DC motor according to claim 1, wherein the rotor Assembly (19) includes second bearing (30), rotor core (25), elastic pin (28), magnetic steel (24), rotor silicon steel sheet (23), first bearing (29), wave-opening washer (26) and shaft clasp (27); the rotor core (25) is set at the front end of the second bearing (30); the elastic pin (28) is set at the front end of the rotor core (25); the magnetic steel (24 ) is set at the front end of the elastic pin (28); the protective magnetic steel (24) is set on the rotor silicon steel sheet (23); the first bearing (29) is set at the front end of the rotor silicon steel sheet (23); the The wave opening washer (26) is arranged on the front end of the first bearing (29); the shaft snap ring (27) is arranged on the front end of the wave opening washer (26). 3. The ultra-thin brushless DC motor according to claim 1, wherein the flange The assembly (20) includes a bladeless flange (31), a flange spacer (32) and an inner hexagonal screw (33); the flange spacer (2) is arranged at the front end of the bladeless flange (31); the Fix the fanless flange (31) and the flange spacer (32) with the hexagon socket set screws (33).