CN101110544A - Brushless synchronous traction generator - Google Patents

Abstract

The invention discloses a brushless synchronous traction generator, which comprises a machine base, a stator, a rotor, a rotor bracket, an exciter stator, an exciter rotor, a left end cover, a right end cover, a rectification module and a rotating shaft. The rotor passes through the rotor bracket The exciter is connected to the rotating shaft, and the exciter is placed inside the rotor. The exciter rotor is an outer rotor, which is set in the rotor bracket, and the winding is connected with the rotor winding through the rectification module; the exciter stator is installed on the extension of the left end cover. On the output end; the shaft is equipped with an axial flow cooling fan for cooling the base and the inner core and winding of the generator. The invention adopts the built-in technology of the exciter, which is light in weight, small in size, short in the axial direction, high in specific power, and low in manufacturing cost; the temperature rise of the generator is small, and because there is no electric brush, it avoids the wear and tear of the electric brush and the deformation of the brush holder. Hidden dangers, low failure rate, more reliable operation.

Description

Brushless synchronous traction generator

technical field

The invention relates to a generator, in particular to a brushless synchronous traction generator used for series hybrid passenger cars.

technical background

The existing serial hybrid passenger car traction generator generally uses a traditional diesel generator set as the traction generator. This kind of motor has a large volume, small specific power, and large axial size. The generator is required to be small in size, light in weight, short in axial dimension, high in specific power and reliable in structural strength, so the existing diesel generator set is actually not very suitable as a traction generator for hybrid electric vehicles. Furthermore, the series hybrid bus traction generator is a rectifier load with variable working conditions, which requires the generator to output high power and operate efficiently and stably in a wide speed range, while the working condition of diesel generator sets The situation is for industrial frequency power grids or special intermediate frequency occasions, where the frequency is relatively fixed and the generator is in a relatively stable working condition. From this point of view, the existing diesel generator set is not suitable as a traction generator for hybrid buses.

Contents of the invention

The purpose of the present invention is to overcome the defects of the existing traction generator-diesel generator set for hybrid electric passenger cars, and provide a brushless synchronous traction generator for serial hybrid electric passenger cars with small volume, light weight, short axial dimension and reliable operation .

The object of the present invention is achieved through the following technical solutions: it includes a machine base, a stator, a rotor, a rotor bracket, an exciter stator, an exciter rotor, a left end cover, a right end cover, a rectification module and a rotating shaft, and the rotor is connected with the rotor bracket through the The rotating shaft is connected, the exciter is placed inside the rotor, and the exciter rotor is an outer rotor, which is set in the rotor bracket, and the winding is connected with the rotor winding through the rectification module; the exciter stator is installed on the protruding part of the left end cover On the end; the shaft is equipped with an axial flow cooling fan for cooling the base and the inner core and winding of the generator.

The preferred solution: the shaft end of the generator is a spline shaft that can be directly coupled with the clutch driven disc of the engine; the base is distributed with cooling ribs parallel to the axis and has ventilation holes; the generator rotor core slot The hard aluminum slot wedge parallel to the axis is used as the damping bar; in the stator core of the exciter, the windings are two-way parallel and double-layered. Selecting these preferred solutions can further simplify the structure and improve performance.

The working principle of the present invention is as follows: the rotating shaft of the generator and the parts on it are driven by the engine to rotate, and the external power supply provides excitation current to the stator winding of the exciter, and the rotor of the exciter generates a three-phase alternating current, which flows into the rotor of the generator after being rectified by the rectifier module , so the generator rotor forms a rotating magnetic field, which generates an induced potential in the stator winding and outputs it to the rectifier load.

The invention has the advantages of: adopting the exciter built-in technology, light in weight, small in size, short in axial dimension, and high in specific power, which is more conducive to the arrangement of series hybrid electric buses; adopting axial flow cooling fans, heat dissipation ribs and air ducts structure, the cooling effect is good, which reduces the temperature rise of the generator; in addition, there is no brush, which avoids the hidden dangers caused by the wear of the brush and the deformation of the brush holder, reduces the failure rate, and thus improves the reliability of the generator operation ; Manufacturing cost is low.

Description of drawings

Fig. 1 is the structural representation of an embodiment of the present invention;

Fig. 2 is a schematic diagram of the structure in the rotor slot of the embodiment shown in Fig. 1 .

In the figure: 1-rotating shaft; 2-exciter stator; 3-exciter rotor; 4-rotor bracket; 5-left end cover; 6-rotor; 7-stator; 8-frame; 9-axial fan; 10- Rectifier module; 11-right end cover; 12- duralumin slot wedge

Detailed ways

Below in conjunction with accompanying drawing, the present invention will be further described.

Referring to the accompanying drawings, this embodiment includes a machine base 8, a stator 7, a rotor 6, a rotor support 4, an exciter stator 2, an exciter rotor 3, a left end cover 5, a right end cover 11, a rectification module 10, and a shaft 1, the generator shaft The extension end is a spline shaft, which can directly realize flexible coupling with the clutch driven disc of the engine. The rotor 6 is connected to the shaft 1 through the rotor bracket 4. The exciter is placed inside the rotor 6, and the exciter rotor 3 is an outer rotor. , set in the rotor bracket 4, the winding is connected with the rotor winding through the rectification module 10; the exciter stator 2 is installed on the protruding end of the left end cover 5; The radiating ribs are provided with ventilation holes, and the shaft 1 is equipped with an axial flow cooling fan 9 for cooling the iron core and windings inside the machine base 8 and the generator.

A hard aluminum slot wedge 12 parallel to the shaft is used as a damping strip in the slot of the generator rotor core.

In the iron core of the stator 2 of the exciter, the winding adopts two-way parallel connection and double-layer stacked winding.

Claims (5)

1. A brushless synchronous traction generator, which comprises an organic base, a stator, a rotor, a rotor support, an exciter stator, an exciter rotor, a left end cover, a right end cover, a rectification module and a rotating shaft, and is characterized in that: the rotor passes through The rotor bracket is connected to the rotating shaft, the exciter is placed inside the rotor, the exciter rotor is an outer rotor, and is set in the rotor bracket, and the winding is connected with the rotor winding through the rectification module; the exciter stator is installed on the left end cover On the protruding end of the shaft; the shaft is equipped with an axial flow cooling fan for cooling the base and the inner core and winding of the generator. 2. The brushless synchronous traction generator according to claim 1, characterized in that: the shaft end of the generator is a spline shaft directly and flexibly coupled with the clutch driven disc of the engine. 3. The brushless synchronous traction generator according to claim 1 or 2, characterized in that: cooling ribs parallel to the axis are distributed on the base, and ventilation holes are opened between the cooling ribs. 4. The brushless synchronous traction generator according to claim 1 or 2, characterized in that: a hard aluminum slot wedge parallel to the axis is used as a damping strip in the slot of the generator rotor core. 5. The brushless synchronous traction generator according to claim 1 or 2, characterized in that: in the core of the stator of the exciter, the windings are two-way parallel and double-layered.

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