CN201018320Y - Synchronous main alternator for electrical transmission automobile - Google Patents

Abstract

The utility model relates to a draught synchronous main alternator, in particular to a synchronous main alternator for automobile with electric transmission. The stator of the main alternator forms a semi-closed groove with its stamping to generate a smooth surface at the inner side of the stator. The number of grooves each pole and each phase is equal to and above 5. The winding is a pulling one with small air gap so as to lower the excitation loss of the rotor. The iron core of the stator is piled up by silicon steel sheets, which can be provided with brush excitation or brushless excitation. The utility model has the advantages of high intensity of motor power, high efficiency, and slow temperature rise. Compared with similar motors at home and abroad, the temperature rise of the rotor is down by 50K, and motor efficiency up by 1.5 percent. The specific power of motors is increased from 0.9 kW/kg to 1.1 kW/kg.

Description

The synchronous main alternator that automobile with electric transmission is used

Technical field

The utility model relates to a kind of traction synchronous main alternator, is specially adapted to automobile with electric transmission sync pulling main generator.

Background technology

At present, on the fax motor vehicle, its main generator is used synchronous generator more, i.e. sync pulling main generator, this generator send the moving yarn system of alternating current (after rectification) supply vehicle fax, as the power supply that drives traction motor.Because trailer system requires the generator volume little, in light weight, capacity is big, and just power density is big, renders a service also high as far as possible simultaneously.Present similar motor all adopts the stator slot shape of opening or half opening and bigger air gap, is difficult to make motor to reach above-mentioned requirements.They otherwise be that volume and weight is bigger than normal, or be temperature rise, particularly rotor, so the temperature rise of motor is generally all higher, rotor particularly, the temperature rise that has just reaches 180k, this motor is used on the fax vehicle, particularly automobile with electric transmission, always can not be to the greatest extent in people's will.

The utility model content

The purpose of this utility model is to adopt specially designed stator punching and winding, adopts more groove number and little air gap, thereby reduces the temperature rise of rotor greatly, improves the efficient of system, improves reliability of operation, improves motor useful life.

The technical solution of the utility model is: a kind of synchronous generator, the stator punching shape semi-enclosed slot of its main frame, make a round-formed approximate smooth surface in the stator, every extremely every phase groove number 〉=5, winding is the threading type winding, adopts less air gap, to reduce the rotor-exciting loss, stator and rotor cores is the iron core that silicon steel sheet changes, and can be has the brush excitation, also can be brushless excitation.

Advantage of the present utility model is: power of motor density is big, the efficient height, and temperature rise is low, compares with the foreign same type motor, and rotor temperature rise reduces about 50k, and electric efficiency improves 1.5 percentage points.The motor specific power is increased to 1.1kW/kg by 0.9kW/kg.

Description of drawings

Fig. 1 is the structural representation of the utility model one embodiment;

Fig. 2 is an electrical schematic diagram embodiment illustrated in fig. 1.

Embodiment:

The utility model is described in further detail below in conjunction with drawings and Examples.

In Fig. 1, the utility model it by main frame stator 4, rotor 3, exciter stator 6, coaxial mounted exciter rotor 5, rotating rectifier 8 and support 2, compositions such as two end cap bearing arrangement 1,7, the punching of main frame stator 4 is the form of semi-enclosed slot, every extremely every phase groove number 〉=5, winding be threading type around winding, the air gap 〉=0.5mm between rotor.

In Fig. 2, it includes rotating exciter magnetic field 9, rotating exciter armature 10, rotating rectifier 11, three-phase bridge rectifier 12, generator field (rotor) 13, generator armature (stator) 14.Its operation principle is identical with general synchronous generator, when dragging rotor rotation and in the rotor winding, pass to exciting current, just will in three-phase stator winding, induce electromotive force, because this motor stator is the semi-closed port flute profile, every extremely every phase groove number is more, air gap and stator slot pitch ratio

Less, therefore, the stator tooth harmonic wave is minimum in the loss that rotor surface causes, and (near-zero), thus the rotor core surface temperature is greatly descended, because air gap is less, exciting current is reduced, the also corresponding reduction of the temperature of rotor-exciting winding.Because air gap is less, the power density of motor can do more relatively.

Claims (1)

1. automobile with electric transmission synchronous main alternator, comprise the main frame stator, rotor, AC excitation machine stator, coaxial mounted exciter rotor, rotating rectifier and support, the end-cover axle bearing apparatus is characterized in that: main frame stator punching shape semi-enclosed slot, every extremely every phase groove number 〉=5, winding is the threading type winding, and the air gap 〉=0.5mm between rotor, stator and rotor cores are the iron core that silicon steel sheet changes.

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