CN203896071U - Permanent magnetic synchronous generator rotor sheet for vehicle - Google Patents

Abstract

The invention discloses a permanent magnet synchronous generator rotor sheet for a vehicle. The permanent magnet synchronous generator rotor sheet comprises a rotor sheet body, a plurality of wide grooves and narrow grooves for storing permanent magnets are evenly arranged in the rotor sheet body, tensioning holes are arranged between the wide grooves and the narrow grooves, second cutoff bridges are arranged on outer sides of the wide grooves, and first cutoff bridges are arranged between the wide grooves and the narrow grooves. Leakage flux of a motor can be effectively reduced, the utilization rate of the permanent magnets is improved, the number of the permanent magnets is reduced, and motor material cost is lowered.

Description

Rotor punching of permanent magnet synchronous generator for vehicle

technical field

The utility model relates to a generator rotor stamping, in particular to a permanent magnet synchronous generator rotor stamping for a vehicle, which belongs to the field of electrical components.

Background technique

In recent years, permanent magnet synchronous generators for vehicles have been used more and more because of their advantages such as high efficiency, good low-speed power supply performance, low voltage adjustment rate, simple structure, reliable operation, and stable performance. There are two types of rotor punching for automotive permanent magnet generators: surface type and built-in type, and the built-in rotor punching is more widely used. The built-in rotor has a large magnetic flux leakage, and the effective utilization rate of the permanent magnet is low, which increases the material cost of the motor.

In order to reduce magnetic flux leakage, existing permanent magnet generators for vehicles are equipped with magnetic isolation bridges on the rotor laminations, but the magnetic isolation effect is not obvious, and the reliability of the rotor laminations is low.

Contents of the invention

Purpose of the invention:

The purpose of the utility model is to propose a permanent magnet synchronous generator rotor punching piece for vehicles which can reduce magnetic flux leakage and ensure mechanical strength and high reliability.

Technical solutions:

A permanent magnet synchronous generator rotor stamping for vehicles, including a rotor stamping body, characterized in that: a plurality of wide slots and narrow slots for placing permanent magnets are uniformly arranged on the rotor stamping body, and the wide slots and narrow slots Tension holes are arranged between the grooves, a second broken bridge is arranged outside the wide groove, and a first broken bridge is arranged between the wide groove and the narrow groove.

Wide grooves are evenly arranged on the outer circumference of the rotor punch body, and narrow grooves are arranged on the inner side of each wide groove on the left and right sides.

The first broken bridge is arranged between the wide groove and any adjacent narrow groove on the same side.

The number of wide slots and narrow slots corresponds to the number of poles of the motor.

Advantages and effects:

The rotor plate of the permanent magnet synchronous generator for vehicles of the utility model has the following advantages and beneficial effects:

(1) The broken bridge structure is adopted to effectively reduce the magnetic flux leakage of the motor rotor;

(2) Effectively guarantee the mechanical strength and high reliability;

(3) Improve the utilization rate of permanent magnets, reduce the amount of permanent magnets, and reduce the cost of motor materials.

Description of drawings:

Fig. 1 is a schematic diagram of the overall structure of the utility model.

Explanation of reference signs:

In the figure: 1-wide slot, 2-first broken bridge, 3-tension hole, 4-narrow slot, 5-second broken bridge, 6-rotor punch body.

Detailed ways:

Below in conjunction with accompanying drawing, the utility model is further described:

As shown in Figure 1, the utility model is a rotor punch applied to a permanent magnet generator for vehicles. The embodiment is a four-pole punch structure, and the rotor punch is a full circle structure, including a rotor punch body 6, which is characterized in that : A plurality of wide slots 1 and narrow slots 4 for placing permanent magnets are evenly arranged on the rotor punching body 6, and a tension hole 3 is arranged between the wide slots 1 and narrow slots 4 for the punching shaft tension in the direction; a second broken bridge 5 is set on the outside of the wide slot 1, and a first broken bridge 2 is set between the wide slot 1 and the narrow slot 4, so that the setting can further increase the ability of the rotor punch to reduce magnetic flux leakage , Effectively reduce the magnetic flux leakage of the motor rotor.

Wide grooves 1 are uniformly arranged on the outer circumference of the rotor punching body 6 , and narrow grooves 4 are arranged on the inside, left and right sides of each wide groove 1 .

The first broken bridge 2 is arranged between the wide groove 1 and the narrow groove 4 on any side adjacent to it and on the same side, that is, between the wide groove 1 and the narrow grooves 4 on the left and right sides adjacent to it. Set the first broken bridge, when it is set to the left, it is all on the left, and when it is set on the right, it is all on the right.

The number of wide slots 1 and narrow slots 4 corresponds to the number of poles of the motor.

The number of the tensioning holes 3 corresponds to the number of poles of the motor, and the diameter of the tensioning holes can be set between 5 and 10 mm. At this time, the effect is the best, and the tensioning holes are too small to affect the tensioning strength of the rotor punch. , If the tension hole is too large, it will affect the magnetic flux leakage of the motor.

The width of the first broken bridge 2 is a, the width of the end of the narrow groove 4 is b, the width a of the first broken bridge 2 and the width b of the narrow groove 4 should satisfy: ; The width of the second broken bridge 5 is a1, the width of the wide groove 1 is b1, the width of the second broken bridge 5 and the width of the wide groove 1 should satisfy: a1= b1. In this way, the mechanical strength is high, and the magnetic isolation effect is good.

When the utility model is used:

At present, the existing rotor punches have no broken bridges, they are connected, and the phenomenon of magnetic flux leakage is serious. The second broken bridge 5 effectively solves this problem.

When the rotor punch is in use, the permanent magnets arranged in the wide slot 1 and the narrow slot 4 emit a total magnetic flux outward, and the total magnetic flux is the sum of the main magnetic flux and the leakage magnetic flux, where the main magnetic flux is the beneficial magnetic flux, Leakage flux is harmful flux. The more leakage flux means the less main flux, the more unfavorable it is to the motor. Set the first broken bridge 2 between the wide slot 1 and the narrow slot 4 and set the second bridge outside the wide slot 1. After the bridge 5 is broken, the magnetic flux leakage is effectively prevented, the magnetic flux leakage is reduced, and the main magnetic flux emitted by the motor is greatly increased. In this way, the amount of permanent magnets can be reduced, effectively saving the production cost of the motor.

Claims (4)

1. automobile permanent magnet synchronous generator rotor punching, comprise rotor punching body (6), it is characterized in that: on rotor punching body (6), be evenly provided with a plurality of for placing sipes (1) and the narrow groove (4) of permanent magnet, between sipes (1) and narrow groove (4), be provided with tension hole (3), arranged outside at sipes (1) has the second bridge cut-off (5), between sipes (1) and narrow groove (4), is provided with the first bridge cut-off (2).

2. automobile permanent magnet synchronous generator rotor according to claim 1 punching, is characterized in that: on rotor punching body (6) excircle, be evenly provided with sipes (1), in the left and right sides, inner side of each sipes (1), be equipped with narrow groove (4).

3. automobile permanent magnet synchronous generator rotor according to claim 1 and 2 punching, is characterized in that: between the narrow groove (4) that the first bridge cut-off (2) is arranged on sipes (1) and any side being adjacent and is homonymy.

4. automobile permanent magnet synchronous generator rotor according to claim 1 and 2 punching, is characterized in that: described sipes (1) is corresponding with motor pole number with the quantity of narrow groove (4).