CN202034882U - Permanent-magnet linear generator with mixed magnetic circuit - Google Patents
Permanent-magnet linear generator with mixed magnetic circuit Download PDFInfo
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- CN202034882U CN202034882U CN2010206014452U CN201020601445U CN202034882U CN 202034882 U CN202034882 U CN 202034882U CN 2010206014452 U CN2010206014452 U CN 2010206014452U CN 201020601445 U CN201020601445 U CN 201020601445U CN 202034882 U CN202034882 U CN 202034882U
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- permanent magnet
- magnetic circuit
- mover
- linear generator
- mixed magnetic
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Abstract
The utility model relates to a permanent-magnet linear generator with a mixed magnetic circuit. The permanent-magnet linear generator is characterized by mainly comprising a stator core and an active cell, wherein the active cell is arranged in the stator core; the stator core is slotted so as to form a plurality of stator teeth; a stator winding is wound on the stator teeth; a plurality of permanent magnets are arranged on the surface of the active cell; the adjacent permanent magnets have reverse polarities, thus forming mixed magnetic circuits in longitudinal direction and transverse direction; and an air gap is formed between the stator tooth of the stator core and the permanent magnet. The permanent-magnet linear generator has a reasonable structure and obvious effect, and can well solve the problems of the existing device.
Description
Technical field
The utility model relates to a kind of novel mixed magnetic circuit permanent magnet linear generator that is used for heat and acoustic power generating system, is that a kind of rectilinear motion that utilizes is converted into the device of electric energy with acoustic wave type mechanical energy, and it is applied to heat sound technical field of power generation.
Background technology
Heat sound generation technology is a kind of brand-new thermoelectric generation technology, has the reliability height, cost of manufacture is low, the heat efficiency is high (30%～40%) and advantage such as environmental protection.Particularly heat sound generation technology can utilize the heat energy of solar energy, industrial exhaust heat and any fuel burning generation to come work, thereby heat sound generation technology is becoming a cutting edge technology in the energy source and power research field.It comprises two subsystems: thermoacoustic engine and linear electric generator.By thermoacoustic engine heat energy is changed into merit (also being a kind of mechanical energy), utilize linear electric generator that the sound merit is changed into electric energy again.No matter the travelling-wave type thermoacoustic engine on efficient, still on clean output work, has all reached higher level, provide a kind of valid approach to the utilization of mechanical energy for realizing heat energy.
But need intermediate transmission mechanism to be connected between present linear electric generator and the thermoacoustic engine, its structure and constructing operation are all complicated, and there is contradiction in original motor axial motion and radial magnetic field profile, influence its result of use greatly.
Summary of the invention
The utility model purpose: the utility model provides a kind of mixed magnetic circuit permanent magnet linear generator, its objective is that there are the problem of contradiction in the complex structure that needs intermediate transmission mechanism to be connected between solution linear electric generator in the past and the thermoacoustic engine to be caused and inefficient problem and axial motion and radial magnetic field profile.
Technical scheme: the utility model is achieved through the following technical solutions:
The mixed magnetic circuit permanent magnet linear generator is characterized in that: this permanent magnet linear generator mainly comprises stator core and mover; Described mover is arranged in the stator core, and fluting forms a plurality of stator tooths in the described stator core, is wound with stator winding on described stator tooth; The surface of described mover is provided with a plurality of permanent magnets, and the polarity of adjacent permanent magnet is opposite, forms the portraitlandscape mixed magnetic circuit; Form air gap between the stator tooth of described stator core and the permanent magnet.
The electric rotating machine structure is adopted in stator core; Stator winding is for concentrating winding.
Described generator both can adopt the mode of mover rotation to generate electricity, and also can adopt the mode of mover straight reciprocating motion to generate electricity; When described generator and thermoacoustic engine coupling, adopt the generation mode of mover straight reciprocating motion; Described mover is arranged on the mover axle.
Permanent magnet adopts the radial magnetizing mode.
The frequency of described mover straight reciprocating motion is within the 0-200Hz, so that be fit to frequency response characteristic.
Described permanent magnet adopts Nd-Fe-B permanent magnet.
Advantage and effect: the utility model provides a kind of mixed magnetic circuit permanent magnet linear generator, it is characterized in that: this permanent magnet linear generator mainly comprises stator core and mover; Described mover is arranged in the stator core, and fluting forms a plurality of stator tooths in the described stator core, is wound with stator winding on described stator tooth; The surface of described mover is provided with a plurality of permanent magnets, and the portraitlandscape mixed and alternate is arranged between a plurality of permanent magnets; Form air gap between the stator tooth of described stator core and the permanent magnet.
Mixed magnetic circuit permanent magnet linear generator of the present utility model is the electromechanical energy conversion device that a kind of rectilinear motion that utilizes mover directly produces electric energy.Mixed magnetic circuit permanent magnet linear generator of the present utility model has been save excitatory loss, improve efficiency of motor, reduce the temperature rise of motor, Nd-Fe-B permanent magnet has strong magnetic force and high-coercive force simultaneously, high magnetomotive force and air gap flux density are arranged, when reducing motor volume and weight, can increase exerting oneself of motor.In addition, for solving the contradiction of original motor axial motion and radial magnetic field profile, the utility model has adopted the mixed magnetic circuit mode, and promptly permanent magnet pole is radially alternately arranged, and also alternately arranges vertically, forms the portraitlandscape mixed magnetic circuit, and its structure as shown in Figure 2.
Adopt mixed magnetic circuit permanent magnet linear generator volume of the present utility model little, light weight, power density height.
There is three-dimensional alternating electromagnetic field in mixed magnetic circuit permanent magnet linear generator inside, wants to understand exactly it in spatial distributions situation and rule over time, thereby obtains the moving steady-state behaviour of motor, and the method that adopts traditional equivalent magnetic circuit is difficulty relatively.Therefore, the utility model utilizes Finite Element Method directly to obtain Distribution of Magnetic Field, and the performance of analysis generator is equipped with suitable control strategy and makes the electromechanical energy conversion of generator reach efficiency optimization.
Mixed magnetic circuit permanent magnet linear generator of the present utility model can directly link to each other with travelling-wave type thermoacoustic engine output resonatron, without any need for middle drive system, can directly drive generator as power source by thermoacoustic engine moves, acoustic energy is changed into electric energy, therefore possess simple in structure, characteristics such as volume is little, and is easy to process, reliable.
The acoustic energy (mechanical energy) that utilizes thermoacoustic engine to send drives mixed magnetic circuit permanent magnet linear generator mover of the present utility model and carries out rectilinear motion, and mover magnetic flux cutting straight line generator unit stator winding produces induced electromotive force.
Mixed magnetic circuit permanent magnet linear generator of the present utility model can directly apply to heat and acoustic power generating system, does not need intermediate transmission mechanism, carries out rectilinear motion under thermoacoustic engine directly drags, and acoustic energy is converted into electric energy, and device structure is simple, good reliability.
Concrete advantage of the present utility model is as follows:
1) enforcement of the present utility model makes thermoacoustic engine utilize thermoacoustic effect that heat energy is converted into acoustic energy, does not have mechanical moving element, and is simple in structure.This mixed magnetic circuit permanent magnet linear generator can increase exerting oneself of motor owing to adopt the Nd-Fe-Bo permanent magnet material with strong magnetic force and high-coercive force when reducing motor volume and weight.Two subsystems have constituted structure matching, the higher heat and acoustic power generating system of thermoelectric conversion efficiency.
2) mover is done straight reciprocating motion under the acoustic pressure effect that thermoacoustic engine produces, in mM disodium hydrogen phosphate of the inner generation of permanent magnet linear generator.
3) alternating magnetic fields cutting stator winding produces induced electromotive force.Under the situation of closing of circuit, heat and acoustic power generating system is converted into acoustic energy by thermoacoustic engine with heat energy outside, by mixed magnetic circuit permanent magnet linear generator of the present utility model acoustic energy is converted into electric energy again.
4) mixed magnetic circuit permanent magnet linear generator of the present utility model both can rotary electrification, also can the straight reciprocating motion generating, and when mating with thermoacoustic engine, motor is the straight reciprocating motion mode.
In addition:
1) adopt heat and acoustic power generating system of the present utility model to form by thermoacoustic engine and mixed magnetic circuit permanent magnet linear generator, simple in structure, easy to operate.
2) adopting heat and acoustic power generating system of the present utility model directly is drive source with heat energy, can be applied to occasion, particularly industrial exhaust heat, fuel combustion or the higher area of solar energy availability that electric energy lacks.
3) heat and acoustic power generating system is moved by the mover that thermoacoustic engine directly drives mixed magnetic circuit permanent magnet linear generator of the present utility model, cuts down the number of intermediate links, and good reliability is saved cost.
4) adopt the working medium of heat sound generator of the present utility model to be nitrogen or inert gas, environmentally friendly, complied with the state guarantee environment, the vision of sustainable development.
5) mixed magnetic circuit structure of the present utility model has improved the conversion efficiency of the hot acoustic-electric of generator.
6) when any end alignment of stator in the utility model, mover, can also work as the electric rotating machine use, to be applicable to the application of special occasions.
Description of drawings:
Fig. 1 is the planar structure schematic diagram of mixed magnetic circuit permanent magnet linear generator of the present utility model;
Fig. 2 is the three-dimensional structure schematic diagram of mixed magnetic circuit permanent magnet linear generator of the present utility model;
Fig. 3 is the stator winding structure schematic diagram of mixed magnetic circuit permanent magnet linear generator of the present utility model;
Fig. 4 is the mover and the magnet structure schematic diagram of mixed magnetic circuit permanent magnet linear generator of the present utility model;
Fig. 5 is mixed magnetic circuit permanent magnet linear generator of the present utility model Distribution of Magnetic Field schematic diagram when unloaded; Wherein Fig. 5-1 is the plane magnetic flux distribution figure of XY axle; Fig. 5-2 is the plane magnetic flux distribution figure of ZY axle.
Embodiment:
The utility model is described in further detail below in conjunction with accompanying drawing, but not because of specific embodiment restriction the utility model.
As shown in Figure 1, the utility model provides a kind of mixed magnetic circuit permanent magnet linear generator, and this permanent magnet linear generator mainly comprises stator core 1 and mover 4; Described mover 4 is arranged in the stator core 1, fluting forms a plurality of stator tooths in the described stator core 1, on described stator tooth, be wound with stator winding 2, stator winding 2 is for concentrating winding, than the Circular Winding mode, the induced electromotive force of concentrating the winding mode to produce is big, and simple in structure, good manufacturability; The surface of described mover 4 is provided with a plurality of permanent magnets 5, and the portraitlandscape mixed and alternate is arranged between a plurality of permanent magnets 5, that is to say that the polarity of adjacent permanent magnet 5 is opposite, forms the portraitlandscape mixed magnetic circuit; Form air gap 6 between the stator tooth of described stator core 1 and the permanent magnet 5.The electric rotating machine structure is adopted in stator core 1; Permanent magnet 5 adopts the radial magnetizing mode.Effect was best when described permanent magnet 5 adopted Nd-Fe-B permanent magnet.
Described generator both can adopt the mode of mover 4 rotations to generate electricity, and also can adopt the mode of mover 4 straight reciprocating motions to generate electricity, and the straight reciprocating motion mode was main motion mode; When described generator and thermoacoustic engine coupling, adopt the generation mode of mover 4 straight reciprocating motions.Described mover 4 is arranged on the mover axle 3
The frequency of described mover 4 straight reciprocating motions is within the 0-200Hz, so that be fit to frequency response characteristic.
As shown in Figure 2, mixed magnetic circuit permanent magnet linear generator of the present utility model both can rotary electrification, also can the straight reciprocating motion generating, and when mate with thermoacoustic engine, the utility model employing straight reciprocating motion mode.Fig. 3 is the stator winding structure schematic diagram of this mixed magnetic circuit permanent magnet linear generator.Stator winding 2 adopts concentrates the winding mode, and than the Circular Winding mode, the induced electromotive force of concentrating the winding mode to produce is big, and simple in structure, good manufacturability.Fig. 4 is the mover and the magnet structure schematic diagram of this mixed magnetic circuit permanent magnet linear generator.Permanent magnet 5 is positioned at the surface of mover 4, and permanent magnet adopts the radial magnetizing mode, and the polarity of adjacent permanent magnet is opposite, forms the portraitlandscape mixed magnetic circuit.Distribution of Magnetic Field schematic diagram when Fig. 5 is the zero load of this mixed magnetic circuit permanent magnet linear generator, wherein Fig. 5-1 is the plane magnetic flux distribution figure of XY axle; Fig. 5-2 is the plane magnetic flux distribution figure of ZY axle.The magnetic circuit of mixed magnetic circuit permanent magnet linear generator of the present utility model distributes than the complexity of conventional motor, is distributed in three dimensions, and existing transverse magnetic field has longitudinal magnetic field again, mainly is divided into: 1. main field is meant the part through the stator yoke closure; 2. interelectrode magnetic leakage is meant that permanent magnet and adjacent opposite polarity permanent magnet form the closed-loop path.3. brow leakage.
The existing transverse magnetic field of mixed magnetic circuit permanent magnet linear generator of the present utility model has longitudinal magnetic field again, novel structure, and industry is made simple.Heat and acoustic power generating system directly drives mixed magnetic circuit permanent magnet linear generator of the present utility model under the pressure of the sound wave (being acoustic energy mechanical energy just) that thermoacoustic engine produces mover carries out rectilinear motion, make mover magnetic flux cutting stator winding, produce induced electromotive force, produce a mM disodium hydrogen phosphate, alternating magnetic fields cutting stator winding produces induced electromotive force.Under the situation of closing of circuit, heat and acoustic power generating system is converted into acoustic energy by thermoacoustic engine with heat energy outside, by mixed magnetic circuit permanent magnet linear generator of the present utility model acoustic energy is converted into electric energy again.
The utility model is rational in infrastructure, and effect is obvious, can well solve the problem that exists in the device in the past.
Claims (6)
1. mixed magnetic circuit permanent magnet linear generator, it is characterized in that: this permanent magnet linear generator mainly comprises stator core (1) and mover (4); Described mover (4) is arranged in the stator core (1), and described stator core (1) is gone up fluting and formed a plurality of stator tooths, is wound with stator winding (2) on described stator tooth; The surface of described mover (4) is provided with a plurality of permanent magnets (5), and the polarity of adjacent permanent magnet (5) is opposite, forms the portraitlandscape mixed magnetic circuit; Form air gap (6) between the stator tooth of described stator core (1) and the permanent magnet (5).
2. mixed magnetic circuit permanent magnet linear generator according to claim 1 is characterized in that: the electric rotating machine structure is adopted in stator core (1); Stator winding (2) is for concentrating winding.
3. mixed magnetic circuit permanent magnet linear generator according to claim 1 is characterized in that: described generator both can adopt the mode of mover (4) rotation to generate electricity, and also can adopt the mode of mover (4) straight reciprocating motion to generate electricity; When described generator and thermoacoustic engine coupling, adopt the generation mode of mover (4) straight reciprocating motion; Described mover (4) is arranged on the mover axle (3).
4. according to the described mixed magnetic circuit permanent magnet linear generator of claim 1, it is characterized in that: permanent magnet (5) adopts the radial magnetizing mode.
5. mixed magnetic circuit permanent magnet linear generator according to claim 3 is characterized in that: the frequency of described mover (4) straight reciprocating motion is within the 0-200Hz, so that be fit to frequency response characteristic.
6. according to any described mixed magnetic circuit permanent magnet linear generator among the claim 1-5, it is characterized in that: described permanent magnet (5) adopts Nd-Fe-B permanent magnet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206014452U CN202034882U (en) | 2010-11-11 | 2010-11-11 | Permanent-magnet linear generator with mixed magnetic circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206014452U CN202034882U (en) | 2010-11-11 | 2010-11-11 | Permanent-magnet linear generator with mixed magnetic circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202034882U true CN202034882U (en) | 2011-11-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206014452U Expired - Fee Related CN202034882U (en) | 2010-11-11 | 2010-11-11 | Permanent-magnet linear generator with mixed magnetic circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202034882U (en) |
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2010
- 2010-11-11 CN CN2010206014452U patent/CN202034882U/en not_active Expired - Fee Related
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111109 Termination date: 20131111 |