CN105915001A - Biradial permanent magnet invisible magnetic pole and electromagnetic driving motor - Google Patents

Abstract

The invention provides a biradial permanent magnet invisible magnetic pole and electromagnetic driving motor, belonging to the automobile motor electric appliance technical field, and comprises a front end cover, a rear end cover, a casing, a rotor and a stator; rectangular permanent magnet steels are respectively installed in first and second rectangular notches of rotor iron core T-shaped salient poles; electro-magnetic coils wind the T-shaped salient poles; a magnetic field in drive motor air gaps is provided by the permanent magnet steels and the electro-magnetic coils; a generated magnetic field directly faces air gaps, generates less leakage flux, and has high efficiency.

Description

Dual Radial Permanent Magnet Invisible Pole and Electromagnetic Drive Motor

technical field

The invention provides a dual-radial permanent magnet invisible magnetic pole and an electromagnetic drive motor, belonging to the technical field of electric vehicle motors and appliances.

Background technique

At present, the rotors of the permanent magnet drive motors used in electric vehicles mostly adopt the permanent magnet external embedded structure, such as the existing technology, patent name: brushless DC motor rotor, patent number: ZL200920116549.1, discloses the following technical solutions, including the rotor Iron core, rotating shaft and permanent magnet. The rotor iron core is composed of punched sheets and connected together. The rotating shaft and the rotor iron core are fixedly connected. An even number of T-shaped wedges are evenly distributed on the outer surface of the rotor iron core. Adjacent T-shaped wedges Slots are formed between the blocks, and the permanent magnets are correspondingly embedded in the slots. The permanent magnets of the rotor with this structure directly face the air gap. Under the action of the armature reaction of the impact current, irreversible demagnetization may occur. Once the permanent magnets form irreversible demagnetization, The efficiency of the driving motor is reduced, and the power and torque drop rapidly, and its performance needs to be further improved.

Contents of the invention

The object of the present invention is to provide a kind of can overcome above-mentioned defect, the magnetic field in the air gap of drive motor is provided by permanent magnet steel and electric field winding together, the magnetic field that produces directly faces air gap, and the double radial permanent magnet invisible of magnetic flux leakage is little Magnetic pole and electromagnetic drive motor, its technical content is:

Double radial permanent magnet invisible magnetic pole and electromagnetic drive motor is composed of front end cover, rear end cover, casing, hybrid excitation rotor and stator. Rotor composition;

The double radial permanent magnet invisible magnetic pole rotor is composed of the shaft, the first rectangular permanent magnet steel, the second rectangular permanent magnet steel, and the rotor core. There are even numbers of T-shaped salient poles on the rotor core, and all T-shaped convex poles The outer sides of the pole transverse parts are all arcs and on the same circumference, the inner sides of all the T-shaped salient pole transverse parts are straight lines and tangent to the same circle, and every interval of a T-shaped salient pole is provided with a cross section that runs through the thickness of the rotor core. An inverted "eight"-shaped groove formed by two first rectangular grooves and the inverted "eight"-shaped groove is located in the inner middle of the T-shaped salient pole transverse part near the outer end, forming the two second "eight"-shaped grooves of the inverted "eight" The outer end of a rectangular slot is not connected to the outer circular arc of the transverse part of the T-shaped salient pole, and the inner ends of the two first rectangular slots forming an inverted "eight"-shaped slot are not connected, and are formed by two first rectangular slots The middle of the outer end of the inverted "eight" shaped slot is provided with a second rectangular slot that runs through the thickness of the rotor core, the second rectangular slot is not connected to the first rectangular slot, and the outer edge of the second rectangular slot is connected to the outer edge of the T-shaped salient The circular arcs are all connected, and the connecting line between the midpoint of the inner side of each second rectangular slot and the center of the rotor core is equal;

Place two identical pieces of the first rectangular permanent magnet steel respectively in the inverted "eight" groove formed by the two first rectangular grooves of the rotor core, and the inverted "eight" groove formed by the two first rectangular permanent magnetic steels The inner side of the shape is N pole, and the second rectangular permanent magnet steel is placed in the second rectangular slot in the middle of the inverted "eight" shaped outer end of the rotor core, and the outer side of the second rectangular permanent magnet steel is The polarity of the two pieces of rectangular permanent magnet steel is N pole, the S pole on the outside of the inverted "eight" shape formed by two pieces of the first rectangular permanent magnet steel and the S pole on the inner side of the second rectangular permanent magnet steel are both led to the T-shaped convex pole through the rotor core. On the outer circular arc surface of the T-shaped salient pole without the first rectangular slot and the second rectangular slot on the pole transverse part, the S pole of the invisible magnetic pole is formed, and the rotor core is pressed on the shaft.

Working principle: When the driving motor is connected to the three-phase alternating current modulated by the three-phase inverter, the stator of the driving motor generates a spatial rotating magnetic field, which interacts with the magnetic field generated by the rotor, and the rotor generates a rotating magnetic field in the same direction as the stator winding. The consistent rotation torque makes the drive motor rotor rotate, and then drives the electric vehicle to run.

Compared with the prior art, the present invention, the rectangular permanent magnet steel is respectively installed in the first rectangular slot and the second rectangular slot of the T-shaped salient pole of the rotor iron core, the electric excitation winding is wound on the T-shaped salient pole, and the motor is driven The magnetic field in the air gap is jointly provided by the permanent magnet steel and the electric excitation winding, and the generated magnetic field directly faces the air gap, with less magnetic flux leakage and high efficiency.

Description of drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present invention.

Fig. 2 is a sectional view of the permanent magnet rotor of the embodiment shown in Fig. 1 .

In the figure: 1. Rear end cover 2. Shaft 3. Case 4. Stator 5. First rectangular permanent magnet steel 6. Second rectangular permanent magnetic steel 7. Rotor core 8. Front end cover.

detailed description

The present invention will be further described below in conjunction with accompanying drawing:

The dual radial permanent magnet invisible magnetic pole and electromagnetic drive motor consists of a front cover 8, a rear end cover 1, a casing 3, a hybrid excitation rotor, and a stator 4. It is characterized in that: the hybrid excitation rotor consists of a salient pole electric excitation rotor and a double radial Composition of permanent magnet invisible pole rotor;

The double radial permanent magnet invisible pole rotor is composed of the shaft 2, the first rectangular permanent magnet steel 5, the second rectangular permanent magnet steel 6, and the rotor core 7. There are even numbers of T-shaped salient poles evenly distributed on the rotor core 7. The outer sides of all T-shaped salient pole transverse parts are circular arcs and on the same circle, and the inner sides of all T-shaped salient pole transverse parts are straight lines and tangent to the same circle. An inverted "eight"-shaped slot formed by two first rectangular slots that runs through the thickness of the rotor core 7, and the inverted "eight"-shaped slot is in the middle of the inner middle of the T-shaped salient pole transverse part near the outer end, forming an inverted "eight" The outer ends of the two first rectangular grooves of the glyph groove are not connected to the outer circular arc of the transverse part of the T-shaped salient pole, and the inner ends of the two first rectangular grooves forming the inverted "eight" groove are not connected. The outer end of the inverted "eight" shaped groove formed by the first rectangular groove is provided with a second rectangular groove that runs through the thickness of the rotor core 7. The second rectangular groove is not connected to the first rectangular groove, and the outer edge of the second rectangular groove is connected to the first rectangular groove. The outer circular arcs of the T-shaped salient poles are all connected, and the midpoint of the inner side of each second rectangular slot is equal to the connection line between the center of the rotor core 7;

Place the identical two pieces of first rectangular permanent magnet steel 5 respectively in the inverted "eight"-shaped groove formed by the two first rectangular grooves of the rotor core 7, and the inverted "eight" groove formed by the two first rectangular permanent magnet steel 5 The inner sides of the "eight" shape are all N poles, and the second rectangular permanent magnet steel 6 is placed in the second rectangular slot in the middle of the inverted "eight" shaped outer end of the N pole on the inner side of the rotor core 7 and the second rectangular The polarity of the outer surface of the permanent magnet steel 6 is N pole, and the S pole on the outside of the inverted "eight" shape formed by two pieces of the first rectangular permanent magnet steel 5 and the S pole on the inner surface of the second rectangular permanent magnet steel 6 pass through the rotor. The iron core 7 leads to the outer arc surface of the T-shaped salient pole without the first rectangular slot and the second rectangular slot on the transverse part of the T-shaped salient pole, forming the S pole of the invisible magnetic pole, and the rotor core 7 Press fit on axis 2.

Claims (1)

1. biradial permanent magnetic invisible magnetic pole and an Electromagnetic Drive motor, by drive end bearing bracket (8), rear end cap (1), casing (3), mixing Excitation rotor, stator (4) form, it is characterised in that: rotor with hybrid excitation is by salient pole electrical excitation rotor and biradial permanent magnet invisible Pole wheel forms；

Biradial permanent magnetic invisible magnetic pole rotor is by axle (2), the first rectangle permanent-magnet steel (5), the second rectangle permanent-magnet steel (6), rotor ferrum Core (7) forms, and rotor core (7) is evenly equipped with even number T font salient pole, and the outside of all T font salient pole lateral parts is Circular arc and on same circumference, the inner side of all T font salient pole lateral parts is straight line and tangent with same circumference, at interval of One T font salient pole is provided with and runs through the inverted "eight" shape groove formed by two the first rectangular channels of rotor core (7) thickness and fall The "eight" shape groove bosom in T font salient pole lateral part, at outer end, forms two first of inverted "eight" shape groove The outer end of rectangular channel does not connects with the external arc of T font salient pole lateral part, forms two the first squares of inverted "eight" shape groove The inner of shape groove does not connects, two the first rectangular channels be provided with in the middle of the outer end of the inverted "eight" shape groove formed and run through rotor core (7) the second rectangular channel of thickness, the second rectangular channel and the first rectangular channel do not connect, the outside of the second rectangular channel and T font salient pole External arc all connect, the inner edge midpoint of each second rectangular channel is the most equal with the line at rotor core (7) center；

Identical two panels the first rectangle permanent-magnet steel (5) is respectively placed at rotor core (7) by two the first rectangular channels In the inverted "eight" shape groove formed and the inner side of inverted "eight" shape that formed of two panels the first rectangle permanent-magnet steel (5) is N pole, by the The second rectangular channel in the middle of the inverted "eight" shape outer end that inner side is N pole that two rectangle permanent-magnet steels (6) are placed on rotor core (7) Interior and the second rectangle permanent-magnet steel (6) lateral surface polarity is N pole, " eight " word that two panels the first rectangle permanent-magnet steel (5) is formed S pole and the S of the second rectangle permanent-magnet steel (6) medial surface outside shape the most all guide to T font salient pole transverse part by rotor core (7) On Fen not only without the first rectangular channel, but also without on the exterior arc surface of the T font salient pole of the second rectangular channel, form the S pole of hidden magnetic pole, turn Sub-iron core (7) is fitted on axle (2).