CN104716790A - 22KW permanent magnet synchronous motor design method - Google Patents
22KW permanent magnet synchronous motor design method Download PDFInfo
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- CN104716790A CN104716790A CN201510157885.0A CN201510157885A CN104716790A CN 104716790 A CN104716790 A CN 104716790A CN 201510157885 A CN201510157885 A CN 201510157885A CN 104716790 A CN104716790 A CN 104716790A
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Abstract
The invention relates to a 22KW permanent magnet synchronous motor design method. The 22KW permanent magnet synchronous motor design method comprises the following steps: designing a permanent magnet synchronous motor magnetic structure, carrying out optimization design of a permanent magnet synchronous motor, implementing an equivalent magnetic circuit method, implementing an equivalent magnetic network method, implementing an electromagnetic field analytical method, implementing an electromagnetic field numerical value calculation method and carrying out water-cooling calculation.
Description
Technical field
The invention belongs to dynamo-electric manufacturing technology field, be specifically related to a kind of 22KW designing permanent-magnet synchronous motor method.
Background technology
The title that China have " the motor production base, the world ", according to statistics, existing all kinds of electric motor system total installation of generating capacity about 700,000,000 kW, year, power consumption was more than 1,000,000,000,000 kWh, accounted for 60% of national gross generation, accounted for about 75% of electric power consumed by industry amount.Current motor average efficiency is lower than developed country 3 ~ 5 percentage points, and operational efficiency is lower than Foreign Advanced Lerel 10 ~ 20 percentage points, and nearly 2,000 hundred million kWh of the annual waste of energy caused because efficiency is low, are equivalent to the energy output that 2.5 pipe of reinforced concrete at Three Gorges Power Stations are annual.Therefore, motor is power consumption rich and influential family, is also the field most with energy-saving potential.According to up-to-date IEC standard, the U.S. enforced IE3 standard from 2010, and motor average efficiency is close to 92%; European Union member countries enforced IE2 standard from 2011, and motor average efficiency is about 90%.China just formulated Motor Energy Efficiency Standard as far back as 2002, and several times revised, and within 2011, minimum energy efficiency standards is enforced in beginning.However, the existing Motor Energy Efficiency level of China is still generally in IE1 standard, and average efficiency about 87%, exists very important gap with developed countries.Therefore the exploitation of efficient and ultra high efficiency energy-saving electric machine and popularization imperative in China.
Magneto produces magnetic field by permanent magnet, and thus without the need to excitation winding and field power supply, structure is simple, loss is little, has the remarkable advantages such as efficiency is high, power density is high.In recent years, along with the raising of permanent magnetic material performance and perfect, the particularly development of rare earth permanent-magnetic material, the performance of permanent magnet motor is promoted further, in efficiency, show that electric exciting motor is difficult to be equal to superiority.China's rare earth resources rich reserves, the output of rare earth permanent magnet occupies first place in the world, and possesses the supremacy clause of development high efficiency energy-saving rare earth permanent-magnet motor; Meanwhile, in magneto and permanent magnetic material research, all international most advanced level is reached.Therefore, give full play to rare earth resources advantage, research and develop and apply permanent magnet motor, significant to the propelling of China's energy conservation, will considerable energy-saving benefit be produced, effectively alleviate China's energy shortage situation.
Rare-earth permanent magnet motor has energy-efficient remarkable advantage, and range of application is just day by day throughout the numerous areas of national defence, Aero-Space, industrial and agricultural production and daily life, and development potentiality is huge.Compared to electric exciting motor, the special and wide variety of rare-earth permanent magnet motor structure, traditional design theory and analytical method have been difficult to the requirement adapting to high performance motor research and development, need the multidisciplinary theory of integrated use and modern designs means, carry out innovation research.The product that traditional design mode obtains, in the relatively-stationary application scenario of operating mode, can show to show good technical performance, but just show some shortcomings under the occasion of complex working condition.
The design theory comparatively perfect of traditional electrical exciting motor, the design and analysis for rare-earth permanent magnet motor provides certain reference and reference.But permanent magnet motor has many new features being different from electric exciting motor: structure is special and various informative, make rear magnetic field and be difficult to regulate, electromagnetic load is high, and starting performance is not ideal enough, and permanent magnet exists loss of excitation risk, etc.Obviously, traditional design theory, empirical parameter and analysis calculation method, be difficult to the requirement meeting development high-performance permanent magnet motor, also need multidisciplinary theory and the modern designs means such as integrated use electric machine theory, Theory of Electromagnetic Field, magnetic material, numerical computations, emulation technology, measuring technology and soft project, in the key technology of permanent magnet motor design, carry out innovation research [3].Present stage permanent magnet motor design is main along electricity consumption exciting motor mentality of designing and step, resolves or numerical method in conjunction with magnetic circuit calculating, electromagnetic field, and software emulation analysis, carrys out complete design task.The product that this Design Mode obtains, in the relatively-stationary application scenario of operating mode, can show good technique performance, but just show deficiency under variable working condition occasion.Therefore, research design of electrical motor and the key technology in analyzing, improve its design concept and method, develop the permanent magnet motor product that application-oriented occasion has optimum adaptation, significant.
Summary of the invention
For above-mentioned deficiency of the prior art, the object of the invention is to provide a kind of 22KW designing permanent-magnet synchronous motor method.
A kind of 22KW designing permanent-magnet synchronous motor method, described method comprises the design of permanent magnet synchronous motor magnetic structure, the optimal design of permanent magnet synchronous motor, magnetic equivalent circuit method, equivalent magnetic network method, electromagnetic field analytic method, Numerical Calculation of Electromagnetic Fields method and water-cooled and calculates.
Described permanent magnet synchronous motor magnetic structure design is specially the approximation technique that permanent magnet can provide maximum every pole magnetic flux area, analysis and comparison is carried out to typical rotor magnetic structure, the computational methods of rotor magnetic circuit structural design feature and structural dimensions and basic magnetic circuit parameters.
The Optimization Design of described permanent magnet synchronous motor, is comprehensively choose based on electromagnetic parameter, target function and constraints, carries out Electromagnetic field Optimization analyses.
Described magnetic equivalent circuit method is the thought utilizing " Chang Hualu ", the magnetic field of in esse for space uneven distribution is changed into the multistage magnetic circuit of equivalence, and approximate think that magnetic flux is along interface and uniform length distribution in every section of magnetic circuit, the calculating in magnetic field is converted to the calculating of magnetic circuit, permanent magnet is equivalent to magnetic potential source or sources of magnetic flux, all the other magnetic circuits according to electro-magnetic motor calculate and carry out.
Described equivalent magnetic network method is connected by node between each unit, forms Magnetic Circuit, try to achieve relevant parameters, before setting up Magnetic Circuit, need to move towards according to the geometry of motor and the magnetic flux of prediction, motor internal magnetic field distribution situation is made and analyzes qualitatively, obtain magnetic network model.
Described electromagnetic field analytic method is the classical way solving partial differential equation, namely finds a continuous function, obtains identity, and meet the definite condition on initial condition and zone boundary after it and it each rank partial derivative is substituted into the partial differential equation solved.
Described Numerical Calculation of Electromagnetic Fields method is many tiny grids by the Region dividing of required electromagnetic field, linked together by net boundary and node between grid and grid, set up the Algebraic Equation set being unknown quantity with the solved function value of node each on grid, obtained the functional value of each node by computer solving, described Numerical Calculation of Electromagnetic Fields method mainly includes limit calculus of finite differences, Finite Element, integral equation method and boundary element method.
The basic structure size of motor, water jacket external diameter 200mm, water jacket sectional dimension is wide 24mm, high 4mm, and described motor comprises rotor, stator, shell and water jacket, and the power of motor is 7.5KW.
Beneficial effect:
Pure electric automobile is as the replacer of conventional fuel oil automobile, and its transport condition complete class is same as general-utility car, will meet the requirements such as speed of operation interval, acceleration performance, grade climbing performance equally.Therefore, for the driving cycle feature of automobile, drive motors should have low speed high torque fan-out capability and wider Constant-power speed range, and the selection of speed governing permanent magnet synchronous motor current relative ideal just, its mechanical property is highly beneficial to driving vehicle.Compared to sinusoidal wave speed governing permanent magnet synchronous motor, square wave speed governing permanent magnet synchronous motor torque current than higher, speed regulating control is more simple, system cost is lower, obtain in electric automobile and apply more widely.
Table 1 designs Performance Parameters as requested.
Accompanying drawing explanation
Fig. 1 is heat-dissipating casing design diagram;
Embodiment
A kind of 22KW designing permanent-magnet synchronous motor method, described method comprises the design of permanent magnet synchronous motor magnetic structure, the optimal design of permanent magnet synchronous motor, magnetic equivalent circuit method, equivalent magnetic network method, electromagnetic field analytic method, Numerical Calculation of Electromagnetic Fields method and water-cooled and calculates.
Described permanent magnet synchronous motor magnetic structure design is specially the approximation technique that permanent magnet can provide maximum every pole magnetic flux area, analysis and comparison is carried out to typical rotor magnetic structure, the computational methods of rotor magnetic circuit structural design feature and structural dimensions and basic magnetic circuit parameters.
The Optimization Design of described permanent magnet synchronous motor, is comprehensively choose based on electromagnetic parameter, target function and constraints, carries out Electromagnetic field Optimization analyses.
Described magnetic equivalent circuit method is the thought utilizing " Chang Hualu ", the magnetic field of in esse for space uneven distribution is changed into the multistage magnetic circuit of equivalence, and approximate think that magnetic flux is along interface and uniform length distribution in every section of magnetic circuit, the calculating in magnetic field is converted to the calculating of magnetic circuit, permanent magnet is equivalent to magnetic potential source or sources of magnetic flux, all the other magnetic circuits according to electro-magnetic motor calculate and carry out.
Described equivalent magnetic network method is connected by node between each unit, forms Magnetic Circuit, try to achieve relevant parameters, before setting up Magnetic Circuit, need to move towards according to the geometry of motor and the magnetic flux of prediction, motor internal magnetic field distribution situation is made and analyzes qualitatively, obtain magnetic network model.
Described electromagnetic field analytic method is the classical way solving partial differential equation, namely finds a continuous function, obtains identity, and meet the definite condition on initial condition and zone boundary after it and it each rank partial derivative is substituted into the partial differential equation solved.
Described Numerical Calculation of Electromagnetic Fields method is many tiny grids by the Region dividing of required electromagnetic field, linked together by net boundary and node between grid and grid, set up the Algebraic Equation set being unknown quantity with the solved function value of node each on grid, obtained the functional value of each node by computer solving, described Numerical Calculation of Electromagnetic Fields method mainly includes limit calculus of finite differences, Finite Element, integral equation method and boundary element method.
The basic structure size of motor, water jacket external diameter 200mm, water jacket sectional dimension is wide 24mm, high 4mm, and described motor comprises rotor, stator, shell and water jacket, and the power of motor is 7.5KW.
Last it is noted that obviously, above-described embodiment is only for example of the present invention is clearly described, and the restriction not to execution mode.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here exhaustive without the need to also giving all execution modes.And thus the apparent change of amplifying out or variation be still among protection scope of the present invention.
Claims (9)
1. a 22KW designing permanent-magnet synchronous motor method, is characterized in that: described method comprises the design of permanent magnet synchronous motor magnetic structure, the optimal design of permanent magnet synchronous motor, magnetic equivalent circuit method, equivalent magnetic network method, electromagnetic field analytic method, Numerical Calculation of Electromagnetic Fields method and water-cooled and calculates.
2. method according to claim 1, it is characterized in that: described permanent magnet synchronous motor magnetic structure design is specially the approximation technique that permanent magnet can provide maximum every pole magnetic flux area, analysis and comparison is carried out to typical rotor magnetic structure, the computational methods of rotor magnetic circuit structural design feature and structural dimensions and basic magnetic circuit parameters.
3. method according to claim 1, is characterized in that: the Optimization Design of described permanent magnet synchronous motor, is comprehensively to choose based on electromagnetic parameter, target function and constraints, carries out Electromagnetic field Optimization analyses.
4. method according to claim 1, it is characterized in that: design of electrical motor step is, rotor adopts built-in, Control Cooling is for exchanging, the saturation point of stator and rotor material silicon steel sheet is at B=12T, the close amplitude of each several part magnetic of motor is less than 12T, and will suitably leave certain allowance, magnetic saturation occurs when described allowance is to avoid motor to run and is advisable.
5. method according to claim 1, it is characterized in that: described magnetic equivalent circuit method is the thought utilizing " Chang Hualu ", the magnetic field of in esse for space uneven distribution is changed into the multistage magnetic circuit of equivalence, and approximate think that magnetic flux is along interface and uniform length distribution in every section of magnetic circuit, the calculating in magnetic field is converted to the calculating of magnetic circuit, permanent magnet is equivalent to magnetic potential source or sources of magnetic flux, all the other magnetic circuits according to electro-magnetic motor calculate and carry out.
6. method according to claim 1, it is characterized in that: described equivalent magnetic network method is connected by node between each unit, form Magnetic Circuit, try to achieve relevant parameters, before setting up Magnetic Circuit, need to move towards according to the geometry of motor and the magnetic flux of prediction, motor internal magnetic field distribution situation is made and analyzes qualitatively, obtain magnetic network model.
7. method according to claim 1, it is characterized in that: described electromagnetic field analytic method is the classical way solving partial differential equation, namely a continuous function is found, obtain identity after it and it each rank partial derivative is substituted into the partial differential equation solved, and meet the definite condition on initial condition and zone boundary.
8. method according to claim 1, it is characterized in that: described Numerical Calculation of Electromagnetic Fields method is many tiny grids by the Region dividing of required electromagnetic field, linked together by net boundary and node between grid and grid, set up the Algebraic Equation set being unknown quantity with the solved function value of node each on grid, obtained the functional value of each node by computer solving, described Numerical Calculation of Electromagnetic Fields method mainly includes limit calculus of finite differences, Finite Element, integral equation method and boundary element method.
9. method according to claim 1, is characterized in that: the basic structure size of motor, water jacket external diameter 200mm, and water jacket sectional dimension is wide 24mm, high 4mm, and described motor comprises rotor, stator, shell and water jacket, and the power of motor is 7.5KW.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105740590A (en) * | 2016-04-13 | 2016-07-06 | 上海信耀电子有限公司 | System and method for obtaining no-load operating point of servo motor |
| CN105787158A (en) * | 2016-02-05 | 2016-07-20 | 天津大学 | Permanent magnet synchronous linear motor modeling and characteristic analyzing method based on equivalent magnetic circuit method |
| WO2019095433A1 (en) * | 2017-11-16 | 2019-05-23 | 江苏大中电机股份有限公司 | Robustness optimization method for ultra-high efficiency alternating-current permanent magnet synchronous electric motor |
| CN110212710A (en) * | 2019-06-17 | 2019-09-06 | 北京理工大学 | A kind of automobile permanent magnet synchronous motor design method |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105787158A (en) * | 2016-02-05 | 2016-07-20 | 天津大学 | Permanent magnet synchronous linear motor modeling and characteristic analyzing method based on equivalent magnetic circuit method |
| CN105787158B (en) * | 2016-02-05 | 2019-06-07 | 天津大学 | Permanent magnetic linear synchronous motor modeling and characteristic analysis method based on magnetic equivalent circuit method |
| CN105740590A (en) * | 2016-04-13 | 2016-07-06 | 上海信耀电子有限公司 | System and method for obtaining no-load operating point of servo motor |
| WO2019095433A1 (en) * | 2017-11-16 | 2019-05-23 | 江苏大中电机股份有限公司 | Robustness optimization method for ultra-high efficiency alternating-current permanent magnet synchronous electric motor |
| CN110212710A (en) * | 2019-06-17 | 2019-09-06 | 北京理工大学 | A kind of automobile permanent magnet synchronous motor design method |
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