CN204231245U - A kind of low-voltage direct permanent magnet generator unit - Google Patents

Abstract

The utility model discloses a low-voltage DC permanent magnet generator set, which comprises a diesel engine, a permanent magnet generator, a rectifier bridge, a filtering device and an oil generator controller; the input end of the rectifier bridge is electrically connected with the output end of the permanent magnet generator, The output end of the rectifier bridge is electrically connected to the input end of the filter device, and the output end of the filter device is the DC output end of the generator set; the permanent magnet generator is a permanent magnet external rotor generator, and the flywheel of the diesel engine is connected to the permanent magnet external rotor through bolts. The rotor of the rotor generator is connected in transmission; the detection terminal of the oil generator controller is electrically connected to the DC output end, and the output end of the oil generator controller is connected to the throttle control valve of the diesel engine. The generator set of the utility model has the advantages of simple structure, high efficiency and high economic benefit.

Description

A low-voltage DC permanent magnet generator set

technical field

The utility model relates to the field of generators, in particular to a low-voltage DC permanent magnet generator set.

Background technique

With the rapid development of the mobile communication industry, there are more and more new mobile base stations and rebuilt mobile base stations. As an important part of mobile base stations, the generator sets used in the communication industry are in increasing demand. At present, most base stations use general-purpose standard three-phase AC generators as backup power to ensure the normal operation of the base station. Its main job is to charge the batteries in the base station, and at the same time provide power to other electrical facilities of the base station when the grid power supply is interrupted. However, the original universal standard three-phase alternator will generate large voltage and current ripples during operation, which will interfere with the signal transmission of the base station communication equipment to a certain extent. The power input required in the float charging mode is different. In addition, the power consumption of other electrical equipment in the base station also changes at any time, that is, the load of the generator is different, and the output speed of the general standard three-phase alternator is different at different loads. It is constant, so the fuel consumption of the diesel engine increases, the fuel is wasted, and the emission increases. Therefore, it is necessary to provide a more economical and energy-saving generating set.

Utility model content

The technical problem to be solved by the utility model is to provide a more energy-saving low-voltage DC permanent magnet generator set.

In order to solve the above technical problems, the technical solution adopted by the utility model is:

A low-voltage DC permanent magnet generator set, comprising a diesel engine, a permanent magnet generator, a rectifier bridge, a filtering device and an engine controller; the input end of the rectifier bridge is electrically connected to the output end of the permanent magnet generator, and the output end of the rectifier bridge end is electrically connected with the input end of the filter device, and the output end of the filter device is the DC output end of the generator set; the permanent magnet generator is a permanent magnet outer rotor generator, and the flywheel of the diesel engine is connected to the permanent magnet outer rotor generator through bolts. The rotor is connected by transmission; the detection end of the oil machine controller is electrically connected to the DC output end, and the output end of the oil machine controller is connected to the throttle control valve of the diesel engine.

Further, the permanent magnet generator is a three-phase permanent magnet outer rotor generator.

Further, the permanent magnet generator is a six-phase permanent magnet outer rotor generator.

Further, the number of poles of the permanent magnet external rotor generator is 16 poles, 20 poles, or 32 poles.

Further, the rectifier bridge is provided with a radiator.

Further, the output frequency of the permanent magnet external rotor generator is 300-500Hz.

Further, the throttle control valve of the diesel engine is an electronic proportional control valve.

The beneficial effects of the utility model are: different from the existing generator set using an electric excitation generator whose speed cannot be adjusted, the low voltage direct current permanent magnet generator set of the utility model adopts a permanent magnet outer rotor generator, and the diesel engine The flywheel is connected to the rotor through bolts, and the structure is simple and reliable. The oil engine controller adjusts the size of the throttle of the diesel engine according to the load of the generator set to adjust the speed and ensure that the output voltage is at the set value, thereby saving fuel consumption, reducing costs and improving economic benefits. .

Description of drawings

Fig. 1 is a compositional block diagram of a low-voltage DC permanent magnet generator set in an embodiment of the present invention;

Fig. 2 is a cross-sectional view of a permanent magnet outer rotor generator in an embodiment of the present invention.

Label description:

1. Rotor; 2. Stator; 3. Transition connection; 10. Diesel engine;

20. Permanent magnet external rotor generator; 30. Rectifier bridge; 40. Filter device;

50. Oil machine controller; 60. Radiator.

Detailed ways

In order to describe the technical content, the achieved purpose and the effect of the present utility model in detail, the following will be described in conjunction with the embodiments and accompanying drawings.

The most critical idea of the utility model is that the oil engine controller adjusts the speed of the diesel engine and the permanent magnet outer rotor generator according to the load requirements, so as to achieve the purpose of saving fuel consumption, reducing costs and improving economic benefits.

Please refer to FIG. 1 and FIG. 2 , a low-voltage DC permanent magnet generator set, including a diesel engine 10, a permanent magnet generator, a rectifier bridge 30, a filtering device 40 and an engine controller 50;

The input end of the rectifier bridge 30 is electrically connected to the output end of the permanent magnet generator, the output end of the rectifier bridge 30 is electrically connected to the input end of the filter device 40, and the output end of the filter device 40 is the DC output end of the generator set;

The permanent magnet generator is a permanent magnet outer rotor generator 20, and the flywheel of the diesel engine 10 is connected with the rotor 1 of the permanent magnet outer rotor generator 20 through bolts;

The detection end of the oil engine controller 50 is electrically connected to the DC output end, and the output end of the oil engine controller 50 is connected to the throttle control valve of the diesel engine 10 .

It can be seen from the above description that the beneficial effect of the present utility model is that the generator of the DC permanent magnet generator set of the present utility model is a permanent magnet outer rotor generator 20, and the rotating speed of the diesel engine 10 and the generator are adjusted by the oil engine controller 50, and the oil The engine controller 50 adjusts the size of the throttle of the oil engine according to the load of the generator to adjust the speed and ensure that the output voltage is at the set value, thereby saving fuel consumption, reducing costs, and improving economic benefits; further, the generator set adopts a permanent magnet outer rotor The generator 20 is used as a generator, and the flywheel of the diesel engine 10 can be directly connected with the rotor 1 of the generator through bolts, which greatly reduces the volume of the generator set.

In this embodiment, the permanent magnet generator is a three-phase or six-phase permanent magnet outer rotor generator 20. The number of poles of the permanent magnet outer rotor generator 20 is 16 poles, 20 poles, or 32 poles. The output frequency of the rotor generator 20 is 300-500 Hz.

The medium-frequency low-voltage alternating current output by the permanent magnet external rotor generator 20 is rectified by a three-phase or six-phase rectifier bridge 30 and filtered by a filter device 40, and becomes a straight direct current power supply with small ripples (the peak-to-peak value of direct current voltage is less than 200mV). It can be used for battery charging of communication base stations or power supply for electrical equipment of base stations. The oil engine controller 50 adjusts the size of the throttle of the diesel engine 10 according to the load of the generator set to adjust the speed and ensure that the output voltage is at the set value, thereby saving fuel consumption and reducing costs. Improve economic efficiency.

In another embodiment, the stator 2 of the permanent magnet external rotor generator 20 is directly installed on the flywheel housing of the diesel engine 10 through the transition joint 3, and the rotor 1 of the permanent magnet external rotor generator 20 is directly installed on the flywheel housing of the diesel engine 10 through bolts. on flywheel.

Further, in this embodiment, in order to improve the heat dissipation effect of the rectifier bridge 30 and ensure its normal operation, the rectifier bridge 30 is provided with a radiator 60 .

Further, in one embodiment, in order to improve the control accuracy of the diesel engine controller 50 on the throttle of the diesel engine 10, the throttle control valve of the diesel engine 10 is an electronic proportional control valve. The engine controller 50 can precisely control the throttle of the diesel engine 10 by controlling the conduction angle of the electronic proportional control valve.

In summary, the low-voltage DC permanent magnet generator set provided by the utility model is not only small in size and simple in structure, has small DC ripple system, and has little interference with the communication base station, but also can adjust the size of the throttle of the oil engine according to the load of the generator to adjust The speed guarantees that the output voltage is at the set value, thereby saving fuel consumption, reducing costs and improving economic benefits.

The above is only an embodiment of the utility model, and does not limit the patent scope of the utility model. All equivalent transformations made by using the utility model specification and accompanying drawings, or directly or indirectly used in related technical fields, are all the same. The theory is included in the patent protection scope of the present utility model.

Claims (7)

1. A low-voltage DC permanent magnet generator set is characterized in that it comprises a diesel engine, a permanent magnet generator, a bridge rectifier, a filtering device and an oil machine controller; The input end of the rectifier bridge is electrically connected to the output end of the permanent magnet generator, the output end of the rectifier bridge is electrically connected to the input end of the filter device, and the output end of the filter device is the DC output end of the generator set; The permanent magnet generator is a permanent magnet outer rotor generator, and the flywheel of the diesel engine is connected with the rotor transmission of the permanent magnet outer rotor generator through bolts; The detection end of the oil machine controller is electrically connected to the DC output end, and the output end of the oil machine controller is connected to the throttle control valve of the diesel engine. 2. The low-voltage DC permanent magnet generator set according to claim 1, wherein the permanent magnet generator is a three-phase permanent magnet outer rotor generator. 3. The low-voltage DC permanent magnet generator set according to claim 1, wherein the permanent magnet generator is a six-phase permanent magnet outer rotor generator. 4. The low-voltage DC permanent magnet generator set according to claim 2 or 3, wherein the number of poles of the permanent magnet outer rotor generator is 16 poles, 20 poles, or 32 poles. 5. The low-voltage DC permanent magnet generator set according to claim 4, characterized in that the rectifier bridge is provided with a radiator. 6. The low-voltage DC permanent magnet generator set according to claim 5, wherein the output frequency of the permanent magnet outer rotor generator is 300-500 Hz. 7. The low-voltage DC permanent magnet generator set according to claim 6, wherein the throttle control valve of the diesel engine is an electronic proportional control valve.