CN203193467U - Switched reluctance motors for electric bicycles and electric motorcycles - Google Patents

Abstract

A switched reluctance motor for electric bicycles and electric motorcycles. It includes a bracket, a stator, a rotor, insulating paper and windings; a central hole is formed in the center of the bracket; the stator is installed on the outer circumference of the bracket, and a plurality of stator teeth are formed on the outer circumference, and the stator teeth are wound with wires connected to the power supply. Winding; insulating paper is sandwiched between the stator teeth and the winding; the rotor is set outside the outer circumference of the stator, and a plurality of rotor teeth are formed on the inner circumference, and its outer circumference is connected to the hub of the rear wheel of electric bicycles and electric motorcycles superior. The switched reluctance motor of the utility model has the following advantages: low cost and convenient daily maintenance are realized without using rare earth and gear reduction devices; the starting current is small, the starting torque is large, and compared with the prior art, it has excellent starting performance; It has the advantages of high efficiency, high efficiency and energy saving, and long mileage within the range of torque and torque; starting and overloading have little impact on the battery, which prolongs battery life; strong overload capacity and strong climbing ability.

Description

Switched reluctance motors for electric bicycles and electric motorcycles

technical field

The utility model belongs to the technical field of motors for electric vehicles, in particular to a switched reluctance motor for electric bicycles and electric motorcycles.

Background technique

Electric bicycles and electric motorcycles are collectively referred to as electric vehicles, which are based on the main structure of ordinary bicycles and motorcycles, use batteries as energy sources, and are equipped with operating components such as motors, controllers, batteries, and handles. A mechatronic personal vehicle displaying instrumentation systems. Because electric bicycles and electric motorcycles have the advantages of light weight, moderate speed, low cost, time-saving and labor-saving, and environmental protection, the number of use in China is gradually increasing in recent years.

The motors on existing electric bicycles and electric motorcycles are usually arranged on the rear axles of bicycles and motorcycles, mainly including two types of toothless brushless permanent magnet DC motors and toothed (with gear reduction) brushless permanent magnet DC motors. kind. Among them, the main advantages of the toothless brushless permanent magnet DC motor are low noise, simple manufacturing process, high efficiency, simple maintenance, and smooth speed regulation in a wide range, but the main disadvantage is the large amount of rare earth used. The main advantages of toothed brushless permanent magnet DC motors are small amount of rare earth, large torque, and strong climbing ability, but the main disadvantages are high noise and difficult daily maintenance due to the gear reduction device.

Due to the current state's strict control over rare earth resources, the price of rare earths has risen, resulting in an increase in the cost of motors. In addition, new standards for the national electric vehicle industry will be released soon, which have strict regulations on the speed and weight of electric vehicles, making it difficult for existing brushless permanent magnet DC motors to meet the national standards.

Contents of the invention

In order to solve the above problems, the utility model aims to provide a switched reluctance motor for electric bicycles and electric motorcycles that has all the advantages of toothless brushless permanent magnet DC motors and toothed brushless permanent magnet DC motors.

In order to achieve the above purpose, the switched reluctance motor for electric bicycles and electric motorcycles provided by the utility model includes a bracket, a stator, a rotor, insulating paper and windings; And the center hole on the rear axle of the electric motorcycle; the stator is in the shape of a ring, and is set on the outer circumference of the bracket, and a plurality of stator teeth are formed on the outer circumference, and the windings connected to the power supply are wound on the stator teeth; the insulating paper It is sandwiched between the stator teeth and the winding; the rotor is also in the shape of a ring, and is set outside the outer circumference of the stator, and a plurality of rotor teeth are formed on the inner circumference, and its outer circumference is connected to the rear of electric bicycles and electric motorcycles on the hub of the wheel.

The ratio of the motor stator pole number Zs (teeth number) to the rotor pole number Zr (teeth number) should satisfy the following relationship:

1) Zs/Zr=K×6/4, K=2, 3, 4, 5;

2) Zs/Zr=K×6/8, K=1, 2, 3, 4;

3) Zs/Zr=K×12/8, K=3;

4) Zs/Zr=K×12/10, K=1, 2;

5) Zs/Zr=K×8/6, K=1, 2, 3

The switched reluctance motor for electric bicycles and electric motorcycles includes two disc-shaped end caps covering both sides of the bracket, the stator and the rotor, and a central hole is formed in the center, and the outer circumference of the end caps is in line with the The hub is connected, and the edge of the center hole of the end cover is connected with the rear axle through the bearing.

The switched reluctance motor for electric bicycles and electric motorcycles provided by the utility model has the following advantages:

1. No rare earth and gear reduction devices are used, which realizes low cost and convenient daily maintenance;

2. The starting current is small, the starting torque is large, and compared with the existing technology, it has excellent starting performance;

3. It has high efficiency in a wide range of speed and torque, high efficiency and energy saving, and long cruising range;

4. Start-up and overload have little impact on the battery, prolonging the battery life;

5. Strong overload capacity and strong climbing ability;

6. There is neither winding nor permanent magnet on the rotor, no heat is generated, the overall structure is easy to dissipate heat, and there will be no high temperature demagnetization and magnetic aging;

7. It can run in four quadrants, has regenerative braking capability, and can feed back braking energy to battery storage to increase the cruising range.

8. The structure is simple, the process is simple, the cost is low, and the reliability is high, which can realize machine winding and improve productivity

9. Its vibration and noise are equivalent to DC brushless permanent magnet motor.

Description of drawings

Fig. 1 is a side view of the structure of the switched reluctance motor for electric bicycles and electric motorcycles provided by the utility model.

Fig. 2 is a longitudinal sectional view of the structure of the electric bicycle and electric motorcycle provided by the utility model with the switched reluctance motor motor installed on the wheel hub

Fig. 3 is a side view of the structure of the electric bicycle and electric motorcycle provided by the utility model with the switched reluctance motor installed on the hub.

Detailed ways

The switched reluctance motor for electric bicycles and electric motorcycles provided by the utility model will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

As shown in Figure 1, the switched reluctance motor for electric bicycles and electric motorcycles provided by the utility model includes a bracket 5, a stator 2, a rotor 1, insulating paper 3 and a winding 4; wherein the bracket 5 is disc-shaped, and its central part A central hole 6 is formed on the rear axle of electric bicycles and electric motorcycles; the stator 2 is in the shape of a ring and is sleeved on the outer circumference of the bracket 5, and a plurality of stator teeth are formed on the outer circumference of the stator teeth, and on the stator teeth The winding 4 connected to the power supply is wound; the insulating paper 3 is sandwiched between the stator teeth and the winding 4; the rotor 1 is also in the shape of a ring, and is arranged outside the outer circumference of the stator 2, and a plurality of rotor teeth are formed on the inner circumference , its outer peripheral surface is then connected on the hub 9 of the electric bicycle and the electric motorcycle rear wheel.

The ratio of the motor stator pole number Zs (teeth number) to the rotor pole number Zr (teeth number) should satisfy the following relationship:

1) Zs/Zr=K×6/4, K=2, 3, 4, 5;

2) Zs/Zr=K×6/8, K=1, 2, 3, 4;

3) Zs/Zr=K×12/8, K=3;

4) Zs/Zr=K×12/10, K=1, 2;

5) Zs/Zr=K×8/6, K=1, 2, 3

The switched reluctance motor for electric bicycles and electric motorcycles includes two disc-shaped end caps 8 covering both sides of the bracket 5, the stator 2 and the rotor 1, and a central hole is formed at the center. The outer circumference of 8 is connected with the hub 9 by screws 7, and the edge of the center hole of the end cover 8 is connected with the rear axle 11 through the bearing 10.

The working principle of the switched reluctance motor for electric bicycles and electric motorcycles provided by the invention follows the principle of minimum magnetic circuit. When the winding is energized, a magnetic field will be generated. According to the principle of the minimum magnetic circuit, the rotor 1 will rotate to the position where the axis of the rotor teeth and the stator teeth of the energized phase coincide. The rotor 1 can be realized by continuously changing the position of the energized winding on the stator 2. rotation.

Claims (3)

1. A switched reluctance motor for electric bicycles and electric motorcycles, characterized in that: the switched reluctance motor includes a bracket (5), a stator (2), a rotor (1), insulating paper (3) and a winding (4); wherein the bracket (5) is disc-shaped, and its central part is formed with a central hole (6) set on the rear axle of electric bicycles and electric motorcycles; the stator (2) is in the shape of a ring, and is set on the bracket On the outer circumference of (5), a plurality of stator teeth are formed on the outer circumference, and the windings (4) connected to the power supply are wound on the stator teeth; the insulating paper (3) is sandwiched between the stator teeth and the windings (4) ; The rotor (1) is also in the shape of a ring, and is arranged on the outside of the outer circumference of the stator (2), and a plurality of rotor teeth are formed on the inner circumference, and its outer circumference is connected to the rear wheel of the electric bicycle and electric motorcycle. onto the hub (9). the 2. The switched reluctance motor for electric bicycle and electric motorcycle according to claim 1, characterized in that: the ratio of the number of poles Zs of the motor stator and the number of rotor poles Zr should satisfy the following relationship: Or Zs/Zr=K×6/4, K=2, 3, 4, 5; Or Zs/Zr=K×6/8, K=1, 2, 3, 4; Or Zs/Zr=K×12/8, K=3; Or Zs/Zr=K×12/10, K=1, 2; Or Zs/Zr=K×8/6, K=1, 2, 3. the 3. The switched reluctance motor for electric bicycles and electric motorcycles according to claim 1, characterized in that: the switched reluctance motor for electric bicycles and electric motorcycles also includes two covers on the bracket (5), On both sides of the stator (2) and the rotor (1), and a disc-shaped end cover (8) with a central hole is formed in the center, and the outer circumference of the end cover (8) and the hub (9) are connected by screws (7) Connected, the edge of the center hole of the end cover (8) joins with the rear axle (11) through the bearing (10). the

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