CN202094756U

CN202094756U - Constant frequency constant voltage sine wave power machine formed by axle generator and inverter

Info

Publication number: CN202094756U
Application number: CN2010202028371U
Authority: CN
Inventors: 林政安
Original assignee: Tellhow Sci Tech Co Ltd
Current assignee: Tellhow Sci Tech Co Ltd
Priority date: 2010-05-25
Filing date: 2010-05-25
Publication date: 2011-12-28
Anticipated expiration: 2020-05-25

Abstract

A constant frequency constant voltage sine wave power machine formed by an axle generator and an inverter is formed by a power device, the generator and the inverter and characterized in that a generator rotor is provided with 20-pole permanent magnetic excitation and electrical excitation, and no winding is arranged on the rotor. A double-star-shaped six-phase winding is installed in a stator slot, an annular excitation winding is arranged on an outer circle of a stator core, the excitation is controlled by an automatic voltage regulator AVR, the AVR carries out excitation increase or excitation decrease and constant voltage control through input of two parameters including phase voltage and power, and the generator is an axle brushless generator with variable speed and constant voltage. The inverter is formed by a six-phase bridge rectifier, four insulated gate bipolar transistor (IGBT) switch inversion circuits, a filter circuit and a digital signal processor (DSP) control circuit. An output device of the power machine is a constant frequency constant voltage sine wave power supply. The power machine has the advantages of 1 being small in size and light in weight; 2 being simplified in control and reliable in operation; 3 being stable in work, good in performance and small in filter capacitance; 4 being high in efficiency.

Description

The constant frequency and constant voltage sine-wave power unit machine that axle generator and inverter constitute

Technical field

The utility model relates to a kind of constant frequency and constant voltage sine-wave power unit machine, relates in particular to the constant frequency and constant voltage sine-wave power unit machine that a kind of axle generator and inverter constitute.

Background technology

Owing to the axle generator that is used at present advancing, engine-driven transmission system rotating speed changes, and obtain the AC power source of sine wave of constant frequency and constant voltage, and complex structure is bulky.For example import the electromagnetic clutch of an adjustable speed by the variation rotating speed of gearbox output, the constant rotating speed of this electromagnetic clutch output, drive the power frequency synchronous generator of constant speed by constant rotating speed, send the sine wave alternating current of constant frequency and constant voltage, the variable-speed clutch that increases in the middle of this system is also bigger than generator bulk volume, weight also will weigh, and the volume of power frequency generator own is also big, weight is also heavy, because of vehicle space is limit, load-carrying is limit, and efficient is also very low simultaneously, generally is lower than 70%, therefore the sort ofly drive the power frequency generator by the output of electromagnetic clutch constant speed and send the constant frequency and constant voltage power supply and be difficult to promote, in fact also use few.How to change this present situation, simplify with the sinusoidal wave electric power-feeding structure of the constant frequency and constant voltage that adapts to mobile generator, the requirement that efficient improves, volume dwindles greatly, weight alleviates greatly is a developing direction in present technique field.

Summary of the invention

The purpose of this utility model provides the constant frequency and constant voltage sine-wave power unit machine that a kind of axle generator and inverter constitute, and that it can improve greatly that constant frequency and constant voltage sine-wave power unit electric power system that electromagnetic clutch speed governing and constant speed engine form exists is bulky, weight is heavy, inefficient defective.

The purpose of this utility model is achieved like this, and the present invention is made of power set, generator, inverter three parts:

Power set comprise engine and gearbox, and engine connects gearbox, and gearbox has two outputs, one end provides the vehicle driving power, and the other end connects generator amature, drives the generator amature rotation, as the power of generator, this part adopts traditional structure, need not give unnecessary details;

Generator is a kind of speed constant pressure axle band permanent magnet generator, and this generator number of poles is 20 utmost points, and the number of phases is 6 phases, and intermediate frequency, excitation mode are that permanent magnetism powers up excitation, and be brushless; Generator comprises stator and rotor, and electricity generator stator core has only one, wherein embeds 6 phase armature winding, and 6 phase armature winding are double star connection, common junction O is a neutral point, and 6 output tokens are 71,72,73,74,75,76, the rectification circuit in the constant voltage input inverter; The stator core cylindrical is settled a circular excitation winding, goes out wire tag 79,710; Generator amature does not have winding, the iron core that three coaxial connections are arranged, from left to right arrange, the embedded Nd-Fe-B permanent magnet of first rotor core, form N, 20 permanent-magnet poles that S is extremely alternate, second rotor core is the magnetic conductor with 10 salient poles, the 3rd rotor core also is the magnetic conductor with 10 salient poles, but 10 salient poles of 10 salient poles of second rotor core and the 3rd rotor core are dislocation to be settled, the magnetic conductor of forming 20 salient poles thus, when being connected with direct current in the circular excitation winding in the stator, produce the axial excitation of direct current, make 10 salient poles of second rotor core produce identical polarity, 10 salient poles of the 3rd rotor core are produced and the opposite same polarity of 10 salient poles of second rotor core, therefore form N, 20 electric field poles that S is extremely alternate realize that 20 permanent-magnet pole excitations add 20 electricity and encourage utmost point excitation function; Also settle an additional winding in the stator core of generator, go out wire tag 77,78, this additional winding power supply provides direct current to supply with annular after rectification and encourages winding, therefore the size and Orientation of DC excitation electric current realizes speed constant pressure control by voltage regulator AVR control, and AVR is by phase voltage and two parameter inputs increasing of frequency magnetic or weak magnetic, constant voltage control, the constant voltage 400V of output is input in the inverter; During rated speed, mainly by permanent magnet excitation work, electric excited work burden is very little, rated voltage output; During high rotating speed, electric excitation direction is opposite with permanent magnet excitation, plays weak magnetic action, and during the slow-speed of revolution, electric excitation direction is identical with the permanent magnet excitation direction, plays the magnetic assist effect, thereby voltage constant is exported; Electricity is encouraged increase during loading, plays the compound excitation effect, and the electricity excitation reduces when reducing load, weakens the compound excitation effect, thereby makes voltage constant;

Inverter is a kind of constant frequency and constant voltage sinewave inverter, mainly by six phase bridge rectifiers and four transistor IGBT switching inverter circuits, and filter circuit and digital signal processor DSP control circuit formation, sample by direct voltage, can control rectification, sampling by ac output voltage and electric current, can be to the engine oil gate control, regulate the input of active power to generator, control simultaneously IGBT open the turn-off time and sine voltage is stablized in the pulse-width modulation sinewave output, because the input voltage of this inverter is constant substantially, so alleviate with general wide transformation input service burden, performance improves, the cost of inverter reduces, power margin reduces, and weight reduces;

The invention has the advantages that: 1, axle generator adopts 20 utmost points, 6 phase intermediate frequency permanent magnetism to add the electric exciting brushless generator, realizes speed change but in the input inverter of constant voltage, makes motor volume little, and is in light weight, than 4 utmost point power frequency brushless generator weight reductions 70%; 2, can realize bidirectional excitation, promptly increase magnetic or weak magnetic work, control is simplified, and is reliable; 3, inverter 6 phase constant voltage sources input, working stability, function admirable, filter capacitor are little, and Sine Wave Pulse Width Modulation sine wave output AC power Electro Magnetic Compatibility is good; 4, the efficient height reaches more than 90%.

Description of drawings

Fig. 1 is a fundamental diagram of the present utility model.

Fig. 2 is the utility model stator core and rotor core position schematic diagram.

In the drawings, 1, power set 2, generator 3, inverter 4, gearbox 5, engine 6, generator amature 7, generator unit stator 8, vehicle power axle 9, rectifier 10, inverter circuit 11, filter circuit 12, control circuit 13, permanent magnet 14, air section 15, rotating shaft 16, stator core 17, rotor core 18, rotor core 19, rotor core 20, every magnetic patch.

Embodiment

As shown in Figure 1 and Figure 2, the utility model is made of power set 1, generator 2, inverter 3 three parts; Power set 1 comprise engine 5 and gearbox 4, and engine connects gearbox, and gearbox has two outputs, and an end provides the driving power of vehicle 8, and the other end connects generator amature 6, drive the generator amature rotation, as the power of generator; Generator comprises stator 7 and rotor 6, and electricity generator stator core has only one, wherein embeds 6 phase armature winding, and output token is 71,72,73; 74,75,76 is double star connection, and O is a neutral point, and 71,72,73,74,75,76 output inserts the rectifier 9 in the inverter; The stator core cylindrical is settled a circular excitation winding, goes out wire tag 79,710; Generator amature 6 no windings, the iron core that three coaxial connections are arranged, from left to right arrange, first rotor core 17 embedded Nd-Fe-B permanent magnets, form N, 20 permanent-magnet poles that S is extremely alternate, second rotor core 18 is the magnetic conductors with 10 salient poles, the 3rd rotor core 19 is the same with second rotor core, magnetic conductor with 10 salient poles, but 10 salient poles of 10 salient poles of second rotor core and the 3rd rotor core are dislocation to be settled, form the magnetic conductor of 20 salient poles, when being connected with direct current in the circular excitation winding in the stator, produce the axial excitation of direct current, it is by the additional winding 77 in the stator, 78 provide the DC excitation source after rectification, give excitation winding 79,710, this exciting current is by voltage regulator AVR control, and AVR is by phase voltage and two parameter inputs increasing of frequency magnetic or weak magnetic, constant voltage control, the constant voltage 400V of output is input in the inverter, direct current size and direction in the stator ring winding can be controlled, and therefore are easy to realize speed constant pressure control, during rated speed, mainly by permanent magnet excitation work, electric excited work burden is very little; During high rotating speed, electric excitation direction is opposite with permanent magnet excitation, plays weak magnetic action; During the slow-speed of revolution, electric excitation direction is identical with the permanent magnet excitation direction, plays the magnetic assist effect, thereby makes voltage constant; The electricity excitation increases during loading, plays the compound excitation effect; The electricity excitation reduced when Reduction of Students' Study Load was carried, and weakened the compound excitation effect, thereby made voltage constant; Because generator adopts intermediate frequency 6 20 electrode structures mutually, excitation mode is again that permanent magnetism powers up excitation, brushless, make the generator volume reduce, weight saving only is 30% of power frequency brushless generator, and realize the constant voltage output under the speed change condition easily, when rotating speed when 2000～3300rpm changes, frequency is 367～550Hz, can stablize output 6 phase 400V alternating voltages;

For the purpose of clearer, Fig. 2 describes the iron core position on stator core 16 of the present invention and the rotor 6 in detail: generator amature 6 is by rotor core 17, rotor core 18, rotor core 19 is formed, in rotating shaft 15, from left to right arrange, be embedded with Nd-Fe-B permanent magnet 13 in the rotor core 17, form N, 20 permanent-magnet poles that S is alternate, rotor core 18 has 10 salient pole magnetic conductors, rotor core 19 also has 10 salient pole magnetic conductors, but 10 salient poles of 10 salient poles of rotor core 18 and rotor core 19 misplace, form 20 salient pole magnetic conductors, these 20 salient poles form N, the electric field pole that S is alternate is by the circular excitation winding 79 on the stator, the axial excitation of direct current in 710, have every magnetic patch 20 in the middle of rotor core 17 and the rotor core 18, leave air section 14 between rotor core 18 and the rotor core 19, stator core length equates with the rotor core total length, stator core 16 has only one, arrange 6 phase armature winding in the groove, 6 phase armature winding double star connections, common junction O is a neutral point, and 6 outputs are labeled as 71,72,73,74,75,76, also settle an additional winding in the stator core slot, outlet is labeled as 77,78, axial air section 14 places between stator core cylindrical respective

rotor iron core

18 and 19, arrange the circular excitation winding, outlet is labeled as 79,710;

Inverter 3 main inverter circuits 10 by six phase bridge rectifiers 9 and four transistor switches, and the control circuit 12 of filter circuit 11 and digital signal processor DSP constitutes, sample by direct voltage, can control rectification, sampling by ac output voltage and electric current, can be to the engine oil gate control, regulate the input of active power to generator, control simultaneously IGBT open the turn-off time and pulse width modulation controlled sinewave output voltage is stable.

Present embodiment has the advantage described in the summary of the invention, has reached the purpose of invention.

Claims

1. the constant frequency and constant voltage sine-wave power unit machine that constitutes of axle generator and inverter, it is made of power set, generator, inverter three parts; Power set comprise engine and gearbox, and engine connects gearbox, and gearbox has two outputs, and an end provides the driving power of vehicle, and the other end connects generator amature, drive the generator amature rotation, as the power of generator; Generator comprises stator and rotor, it is characterized in that electricity generator stator core has only one, wherein embeds 6 phase armature winding, and 6 phase armature winding are double star connection, the rectification circuit in the constant voltage input inverter; The stator core cylindrical is settled a Circular Winding; Generator amature does not have winding, the iron core that three coaxial connections are arranged, the embedded permanent magnet of first rotor core, form 20 utmost points, two rotor cores are the magnetic conductors with 10 salient poles, be the N utmost point, the 3rd rotor core is the same with second rotor core, magnetic conductor with 10 salient poles, be the S utmost point, 10 salient poles of second rotor core and 10 salient poles of the 3rd rotor core misplace, form 20 utmost points, these 20 magnetic poles are by the axial excitation of direct current in the Circular Winding on the stator, it provides the DC excitation source by the additional winding in the stator after rectification, give excitation winding, this exciting current is controlled by voltage regulator AVR, AVR is by phase voltage and two parameter inputs increasing of frequency magnetic or weak magnetic, constant voltage control, the constant voltage 400V of output is input in the inverter, direct current size and direction in the control stator ring winding, realize speed constant pressure, generator adopts intermediate frequency 6 20 electrode structures mutually, and excitation mode is that permanent magnetism powers up excitation, and generator is a kind of speed constant pressure axle band brushless generator; Inverter is made of the control circuit of the inverter circuit of six phase bridge rectifiers, four transistor IGBT switches, filter circuit, digital signal processor DSP, sample by direct voltage, rectification is controlled, sampling by ac output voltage and electric current, to the engine oil gate control, regulate the input of active power to generator, that controls IGBT simultaneously opens turn-off time and pulse width modulation controlled sinewave output burning voltage.