Alternating-current generator

Abstract

The utility model provides an alternating-current generator, and belongs to the technical field of electromechanics. The problem that in the prior art, the efficiency of a generator is not high enough is solved. The motor comprises a casing, a front end cover and a rear end cover, a stator iron core and a rotor are fixedly mounted in the casing, a stator winding is wound and fixed on the stator iron core, the rotor is mounted in the stator iron core, the rotor comprises a first rotor iron core, a second rotor iron core and a rotor coil, and the first rotor iron core, the second rotor iron core and the rotor coil are arranged in the casing. The first rotor iron core and the second rotor iron core are arranged oppositely, a plurality of first pole claws and a plurality of second pole claws are formed on the first rotor iron core and the second rotor iron core respectively, the first pole claws and the second pole claws are arranged alternately, and placing cavities are formed in the middles of the first rotor iron core and the second rotor iron core. The rotor coil is fixedly installed in the placing cavity, and the length of the first pole claw and the length of the second pole claw are the same as the length of the rotor coil. The utility model has the advantage of high working efficiency.

Description

Technical Field

[0001] The utility model belongs to the field of electromechanical technology and relates to an AC generator. Background Art

[0002] Generator sets refer to power generation equipment that can convert mechanical energy or other renewable energy into electrical energy. Appropriate magnetic and conductive materials are used to form magnetic circuits and circuits for mutual electromagnetic induction to generate electromagnetic power and achieve the purpose of energy conversion.

[0003] A Chinese patent with publication number CN211557026U discloses an AC generator, comprising: a rotor shaft having an output end; a bearing having an inner ring and an outer ring, the output end of the rotor shaft being rotatably supported in the inner ring of the bearing; a repair ring, the repair ring being sleeved on the outer ring of the bearing; an end shield, the end shield defining a through hole extending in an axial direction, the repair ring being fitted in the through hole, and the output end of the rotor shaft extending out of the through hole; a guard plate, the guard plate being mounted to the end shield to cover the through hole, wherein the guard plate has a circular body, a first protrusion extending radially outward from the body, and a second protrusion protruding axially outward from the outer surface of the body and extending radially outward beyond the first protrusion; the end shield is formed with a flange extending radially inward at the outer edge of the through hole, the end shield is defined with a notch in the flange and a groove communicating with the notch in the flange; the first protrusion is received in the groove, the second protrusion is received in the notch and axially abuts against the axial bottom wall of the notch.

[0004] It can be seen from the specification and drawings provided by the patent that in the AC generator provided by the patent, the magnetic core and armature area in the rotor are not large enough, and the power generation efficiency is relatively limited. Utility Model Content

[0005] The purpose of the utility model is to provide an AC generator in view of the above problems existing in the prior art.

[0006] The purpose of the utility model can be achieved through the following technical solutions: an AC generator, comprising a casing, a front cover and a rear cover, a stator core and a rotor are fixedly installed inside the casing, a stator winding is fixedly wound on the stator core, and the rotor is installed inside the stator core, the rotor comprises a first rotor core, a second rotor core and a rotor coil, the first rotor core and the second rotor core are placed opposite to each other, a plurality of first pole claws and a plurality of second pole claws are respectively formed on the first rotor core and the second rotor core, the first pole claws and the second pole claws are arranged alternately, a placement cavity is formed in the middle of the first rotor core and the second rotor core, the rotor coil is fixedly installed in the placement cavity, and the length of the first pole claw and the second pole claw is the same as that of the rotor coil.

[0007] In the above-mentioned AC generator, a through hole is formed on the first rotor core, a single wire extends from the front end of the rotor coil, and the single wire passes through the through hole.

[0008] In the above-mentioned AC generator, a generator shaft is passed through the rotor coil, and the generator shaft extends out of the front cover and the rear cover respectively.

[0009] In the above-mentioned AC generator, a yoke is integrally formed inside the first rotor core, and the yoke is in the shape of a ring cylinder.

[0010] In the above-mentioned AC generator, a bearing is sleeved on the generator shaft, a shock-absorbing spring is fixed on the bearing, and one end of the shock-absorbing spring is connected to the inner wall of the front end cover.

[0011] Compared with the prior art, the AC generator provided by the utility model has the following beneficial effects: 1. Through the structural arrangement of the first rotor core and the second rotor core, the first pole claw and the second pole claw are arranged alternately and the length of the first pole claw and the second pole claw is the same as the rotor coil, which increases the magnetic field density formed between the rotor coil and the first rotor core and the second rotor core during operation of the utility model, thereby improving the power generation efficiency of the utility model; 2. By arranging a magnetic yoke in the first rotor core, the magnetic field density between the first rotor core and the rotor coil is further improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0013] Figure 2 It is a schematic diagram of the explosion structure of the utility model;

[0014] Figure 3 is a schematic diagram of the rotor structure;

[0015] Figure 4 It is a schematic diagram of the structure of the first rotor core.

[0016] In the figure: 1, casing; 2, front cover; 3, rear cover; 4, stator core; 41, stator winding; 5, rotor; 51, first rotor core; 511, first pole claw; 512, through hole; 513, yoke; 52, second rotor core; 521, second pole claw; 53, rotor coil; 531, single conductor; 54, placement cavity; 6, generator shaft; 61, bearing; 7, shock-absorbing spring. DETAILED DESCRIPTION

[0017] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0018] like Figures 1 to 4 As shown, this embodiment includes a housing 1, a front cover 2 and a rear cover 3, the front cover 2 and the rear cover 3 are fixedly installed on the front and rear sides of the housing 1 respectively, a stator core 4 and a rotor are fixedly installed inside the housing 1, a stator winding 41 is wound and fixed on the stator core 4, a rotor 5 is installed inside the stator core 4, a first rotor core 51 and a second rotor core 52 are placed opposite to each other, a plurality of first pole claws 511 and second pole claws 521 in the form of long strips are formed on the first rotor core 51 and the second rotor core 52 respectively, the first pole claws 511 and the second pole claws 521 are alternately arranged during assembly, and the first rotor core 51 and the second rotor core 52 are arranged in a first and second manner. A placement cavity 54 is formed in the middle, and the rotor coil 53 is fixedly installed in the placement cavity 54. The length of the first pole claw 511 and the second pole claw 521 is the same as that of the rotor coil 53. The inner walls of the first pole claw 511 and the second pole claw 521 are close to the outer wall of the rotor coil 53. The generator shaft 6 is passed through the rotor coil 53, and the generator shaft 6 is fixed to the first rotor core 51, the second rotor core 52 and the rotor coil 53. When the generator shaft 6 is running, it drives the first rotor core 51, the second rotor core 52 and the rotor coil 53 to run, and a magnetic field is generated between the first rotor core 51, the second rotor core 52 and the rotor coil 53.

[0019] To elaborate further, Figures 1 to 4 As shown, two through holes 512 are opened on the first rotor core 51 , and a single wire 531 extends from the front end of the rotor coil 53 . The single wire 531 passes through the through hole 51 and is close to the outer surface of the generator shaft 6 .

[0020] To elaborate further, Figures 1 to 4 As shown, a yoke 513 is integrally formed inside the first rotor core 51. The yoke 513 is in the shape of a ring cylinder. The yoke 513 of this structure increases the surface area of ​​the first rotor core 51 and increases the magnetic field density between the first rotor core 51 and the rotor coil 53 during operation.

[0021] To elaborate further, Figure 2 As shown, a bearing 61 is sleeved on the generator shaft 6 located inside the front end cover 2, and a shock-absorbing spring 7 is fixed on the bearing 61. One end of the shock-absorbing spring 7 is connected to the inner wall of the front end cover 2, and the shock-absorbing spring 7 plays a role in protecting the bearing 61.

[0022] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

[0023] Although various terms are used more frequently in this article, the possibility of using other terms is not excluded. These terms are used only to more conveniently describe and explain the essence of the utility model; interpreting them as any additional restrictions is contrary to the spirit of the utility model.

Claims

1. An AC generator, comprising a housing (1), a front cover (2) and a rear cover (3), wherein a stator core (4) and a rotor (5) are fixedly mounted inside the housing (1), a stator winding (41) is fixedly wound on the stator core (4), and the rotor (5) is mounted inside the stator core (4), characterized in that: The rotor (5) comprises a first rotor core (51), a second rotor core (52) and a rotor coil (53); the first rotor core (51) and the second rotor core (52) are placed opposite each other; a plurality of first pole claws (511) and a plurality of second pole claws (521) are respectively formed on the first rotor core (51) and the second rotor core (52); the first pole claws (511) and the second pole claws (521) are arranged alternately; a placement cavity (54) is formed in the middle of the first rotor core (51) and the second rotor core (52); the rotor coil (53) is fixedly mounted in the placement cavity (54); and the lengths of the first pole claws (511) and the second pole claws (521) are the same as those of the rotor coil (53).

2. An AC generator according to claim 1, characterized in that: A through hole (512) is provided on the first rotor iron core (51), a single wire (531) extends from the front end of the rotor coil (53), and the single wire (531) passes through the through hole (512).

3. An AC generator according to claim 1, characterized in that: A generator shaft (6) is inserted into the rotor coil (53), and the generator shaft (6) extends out of the front end cover (2) and the rear end cover (3).

4. An AC generator according to claim 1, characterized in that: A magnetic yoke (513) is integrally formed inside the first rotor iron core (51), and the magnetic yoke (513) is in the shape of a ring cylinder.

5. An AC generator according to claim 3, characterized in that: A bearing (61) is sleeved on the generator shaft (6), a damping spring (7) is fixed on the bearing (61), and one end of the damping spring (7) is connected to the inner wall of the front end cover (2).

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