Two-stage low-voltage direct-current generator structure

Abstract

The utility model belongs to the technical field of motor design, and particularly relates to a two-stage low-voltage direct-current generator structure. The device is composed of an alternating current main generator and an exciter (including a rotary rectifier assembly). The excitation is from a DC voltage generated by itself. When the engine drives the generator rotor to rotate, the direct current provides direct current voltage for the exciter stator through the controller, and the exciter rotor winding generates three-phase alternating current voltage. The rotating rectifier assembly rectifies alternating current voltage from an exciter rotor into direct current and provides direct current voltage for a main generator rotor to form a rotating magnetic field, so that a main generator stator winding generates three-phase alternating current voltage, and (28 + / -1) V direct current is output through rectification of a rectifier bridge. A rectification assembly of a motor of the same type is generally externally hung outside a motor shell, and the motor of the structure enables a rectifier bridge assembly to be arranged inside the motor, so that compared with the former, the loss is small, and the power density is higher.

Description

TECHNICAL FIELD

[0001] The utility model belongs to motor design technical field, concretely is a two -stage low -voltage DC generator structure. BACKGROUND

[0002] The traditional low -voltage DC generator adopts brush form, and the brush reliability is low during long -term operation, and the use and maintenance cost are high, the low -voltage DC generator of the present application adopts brushless structure, and the rectifier bridge is arranged in the shell, so that the volume is small, the weight is light, and the voltage pulsation is small. SUMMARY

[0003] The utility model discloses a two -stage low -voltage DC generator structure to realize the purpose of high power density, small loss and stable output voltage.

[0004] The utility model discloses a two -stage low -voltage DC generator structure, including rotor subassembly 1, shell subassembly 2, wherein rotor subassembly 1 includes hollow shaft 6, elastic axle 14, axial flow fan 9, main rotor subassembly 4, rotating excitation component 5, wherein, elastic axle 14 is connected with hollow shaft 6 through inner spline, and axial flow fan 9, main rotor subassembly 4, rotating excitation component 5 are in proper order press -fitting to hollow shaft 6, and rotor subassembly 1, shell subassembly 2 are limited by the shaft shoulder on hollow shaft 6, shell subassembly 2 includes main stator subassembly 3, exciter stator subassembly 7, rectifier bridge subassembly 8, voltage stabilizing component 10, main terminal block subassembly 11, rear end cover subassembly 12, insulating component 13, wind shield 15, shell subassembly 19, and main stator subassembly 3, exciter stator subassembly 7, voltage stabilizing component 10, main terminal block subassembly 11, rear end cover subassembly 12, wind shield 15 are installed in proper order according to the spatial arrangement on shell subassembly 19.

[0005] Rotating excitation component 5 includes rotating rectifier bridge subassembly 16 and exciter rotor subassembly 17, and rotating rectifier bridge subassembly 16 is installed on exciter rotor support 18 of exciter rotor subassembly 17.

[0006] Rear end cover subassembly 12 includes rectifier bridge subassembly 8 and insulating component 13, and rectifier bridge subassembly 8 is completely embedded in insulating component 13.

[0007] Plastic pressure embedding round nut in insulating component 13.

[0008] Voltage stabilizing component 10 is provided with capacitor and resistance module inside, and is connected in parallel with positive and negative terminal pieces of main terminal block subassembly 11.

[0009] A plurality of square teeth are arranged on the pole plate 20 of the rectifier bridge subassembly 8.

[0010] The utility model discloses a beneficial effect: the present application is composed of AC main generator, exciter (including rotating rectifier subassembly). The excitation comes from the DC voltage of self generation. When the engine drives the generator rotor rotation, the DC voltage is provided to the exciter stator through the controller, and the exciter rotor winding generates three-phase AC voltage. Rotating rectifier subassembly rectifies the AC voltage from the exciter rotor into DC, and provides the DC voltage to the main generator rotor, forms the rotating magnetic field, makes the main generator stator winding generate three-phase AC voltage, and rectifies the output (28+1) V DC through the rectifier bridge. The rectification subassembly of the same type motor is generally externally hung on the motor shell, and the motor of this structure form embeds rectifier bridge subassembly in the motor, and compared with the former, the loss is small, and the power density is higher. The motor structure of the present application is compact, greatly improves the motor power ratio, and the volume is small, the weight is light, the power output is stable, meets the development direction of future aviation motor, can cater to market demand, and has wide prospect. BRIEF DESCRIPTION OF DRAWINGS

[0011] Figure 1 It is a two-stage low voltage DC generator structure schematic diagram of the utility model.

[0012] Figure 2 It is the structure schematic diagram of voltage stabilizing subassembly 10 of the utility model.

[0013] Figure 3 It is the structure schematic diagram and A-A direction section view of insulating subassembly 13 of the utility model.

[0014] Figure 4 It is the structure schematic diagram of rectifier bridge subassembly 8 of the utility model.

[0015] Wherein: 1 - rotor subassembly, 2 - shell subassembly, 3 - main stator subassembly, 4 - main rotor subassembly, 5 - rotating excitation subassembly, 6 - hollow shaft, 7 - exciter stator group, 8 - rectifier bridge subassembly, 9 - axial flow fan, 10 voltage stabilizing subassembly, 11 - main wiring seat subassembly, 12 - rear end cover subassembly, 13 - insulating subassembly, 14 - elastic shaft, 15 - wind shield, 16 - rotating rectifier bridge subassembly, 17 - exciter rotor subassembly, 18 - exciter rotor support, 19 - shell subassembly. DETAILED DESCRIPTION

[0016] The utility model is further explained in connection with the drawings as follows:

[0017] As Figure 1The two-stage low-voltage DC generator structure shown comprises a rotor assembly 1 and a shell assembly 2; wherein the rotor assembly 1 comprises a hollow shaft 6, an elastic shaft 14, an axial flow fan 9, a main rotor assembly 4 and a rotating excitation assembly 5; the elastic shaft 14 is connected with the hollow shaft 6 through internal splines, the axial flow fan 9, the main rotor assembly 4 and the rotating excitation assembly 5 are sequentially press-fitted onto the hollow shaft 6, and the rotor assembly 1 and the shell assembly 2 are limited by the shaft shoulder on the hollow shaft 6; the shell assembly 2 comprises a main stator assembly 3, an exciter stator assembly 7, a rectifier bridge assembly 8, a voltage stabilizing assembly 10, a main terminal block assembly 11, a rear end cover assembly 12, an insulation assembly 13, a fan cover 15 and a shell subassembly 19; the main stator assembly 3, the exciter stator assembly 7, the voltage stabilizing assembly 10, the main terminal block assembly 11, the rear end cover assembly 12 and the fan cover 15 are sequentially threadedly installed on the shell subassembly 19 according to the order of spatial arrangement.

[0018] The rotating excitation assembly 5 comprises a rotating rectifier bridge assembly 16 and an exciter rotor assembly 17, and the rotating rectifier bridge assembly 16 is installed on the exciter rotor support 18 of the exciter rotor assembly 17.

[0019] The rear end cover assembly 12 comprises the rectifier bridge assembly 8 and the insulation assembly 13, and the rectifier bridge assembly 8 is completely embedded in the insulation assembly 13.

[0020] As shown in Figure 3 , in order to ensure the connection of the rear end cover assembly 12 and the shell assembly 2, the rectifier bridge assembly 8 and the insulation assembly 13, a plastic-pressed embedded round nut is arranged in the insulation assembly 13, and the base material is selected to be phenolic single-wire plastic, which can ensure insulation and installation between components after cold forming.

[0021] As shown in Figure 2 , the voltage stabilizing assembly 10 is internally provided with a capacitor and a resistance module, and is connected in parallel with the positive and negative terminal pieces of the main terminal block assembly 11 to realize the voltage stabilizing function.

[0022] As shown in Figure 4 , a plurality of square teeth are arranged on the pole plate 20 of the rectifier bridge assembly 8 to increase the heat dissipation area and reduce energy loss.

[0023] According to different heat dissipation requirements, the axial flow fan 2 draws air into the motor interior, and the main stator assembly 3, the main rotor assembly 4, the rotating rectifier assembly 5, the exciter rotor assembly 6, the exciter stator assembly 7 and the rectifier bridge assembly 8 are sequentially cooled.

[0024] The working principle of the application is that when the engine drives the generator rotor to rotate, the DC power provides DC voltage to the exciter stator through the controller, the exciter rotor winding generates three-phase AC voltage. The rotating rectifier assembly rectifies the AC voltage from the exciter rotor into DC and provides the DC voltage to the main generator rotor to form a rotating magnetic field, so that the main generator stator winding generates three-phase AC voltage, which is rectified by the rectifier bridge to output (28±1) V DC.

Claims

1. A two-stage low-voltage DC generator structure, characterized by: The application relates to a motor, which comprises a rotor assembly (1) and a shell assembly (2); wherein the rotor assembly (1) comprises a hollow shaft (6), an elastic shaft (14), an axial flow fan (9), a main rotor assembly (4) and a rotating excitation assembly (5); the elastic shaft (14) is connected with the hollow shaft (6) through internal splines; the axial flow fan (9), the main rotor assembly (4) and the rotating excitation assembly (5) are press-fitted onto the hollow shaft (6) in sequence; the rotor assembly (1) and the shell assembly (2) are limited by a shaft shoulder on the hollow shaft (6); the shell assembly (2) comprises a main stator assembly (3), an exciter stator assembly (7), a rectifier bridge assembly (8), a voltage stabilizing assembly (10), a main terminal block assembly (11), a rear end cover assembly (12), an insulation assembly (13), a fan cover (15) and a shell subassembly (19); the main stator assembly (3), the exciter stator assembly (7), the voltage stabilizing assembly (10), the main terminal block assembly (11), the rear end cover assembly (12) and the fan cover (15) are threadedly installed on the shell subassembly (19) according to the order of spatial arrangement.

2. The two-stage low voltage DC generator structure according to claim 1, characterized in that: The rotating excitation assembly (5) comprises a rotating rectifier bridge assembly (16) and an exciter rotor assembly (17), and the rotating rectifier bridge assembly (16) is installed on an exciter rotor support (18) of the exciter rotor assembly (17).

3. The two-stage low voltage DC generator structure according to claim 1, characterized in that: The rear end cover assembly (12) comprises the rectifier bridge assembly (8) and the insulation assembly (13), and the rectifier bridge assembly (8) is completely embedded in the insulation assembly (13).

4. The two-stage low voltage DC generator structure according to claim 1, characterized in that: A plastic-pressed embedded round nut is arranged in the insulation assembly (13).

5. The two-stage low voltage DC generator structure according to claim 1, characterized in that: The voltage stabilizing assembly (10) is internally provided with a capacitor and a resistance module, and is connected in parallel with positive and negative terminal pieces of the main terminal block assembly (11).

6. The two-stage low voltage DC generator structure of claim 1, wherein: A plurality of square teeth are arranged on a pole plate (20) of the rectifier bridge assembly (8).

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