CN113239593B - Design method suitable for optimizing efficiency of water-filled submersible motor - Google Patents
Design method suitable for optimizing efficiency of water-filled submersible motor Download PDFInfo
- Publication number
- CN113239593B CN113239593B CN202110547334.0A CN202110547334A CN113239593B CN 113239593 B CN113239593 B CN 113239593B CN 202110547334 A CN202110547334 A CN 202110547334A CN 113239593 B CN113239593 B CN 113239593B
- Authority
- CN
- China
- Prior art keywords
- motor
- water
- submersible motor
- filled submersible
- length
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/20—Design optimisation, verification or simulation
- G06F30/23—Design optimisation, verification or simulation using finite element methods [FEM] or finite difference methods [FDM]
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Computer Hardware Design (AREA)
- Evolutionary Computation (AREA)
- Geometry (AREA)
- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Motor Or Generator Frames (AREA)
- Manufacture Of Motors, Generators (AREA)
Abstract
The invention discloses a design method suitable for optimizing efficiency of a water-filled submersible motor, which comprises the following steps: providing an electromagnetic overall design target of the water-filled submersible motor according to parameters such as rated data; selecting a motor stator and rotor topology; selecting a preliminary electromagnetic design scheme of the water-filled submersible motor; by optimizing the diameter-shaft length ratio and the air gap length of the water-filled submersible motor, the water friction loss of the water-filled submersible motor is reduced, and the motor efficiency is improved. The invention adopts two-dimensional time harmonic field to analyze the influence of the inner diameter of the stator and the length of an air gap on the electromagnetic performance and the electromagnetic loss of the submersible motor; the change curve of water friction loss along with the inner diameter of the stator and the length of the air gap is drawn according to the water friction loss expression, the size of the motor is determined according to the change of the loss curve and the performance parameters of the motor and the requirement of the actual working condition, the water friction loss of the water-filled submersible motor can be effectively reduced, and the efficiency of the water-filled submersible motor is improved.
Description
Technical Field
The invention relates to the field of motor optimization, in particular to a design method suitable for optimizing efficiency of a water-filled submersible motor.
Background
At present, the water-filled submersible motor is designed mainly by an empirical method through a main size formula according to the existing induction motor in the design process. Different from the traditional motor, the cavity of the motor is filled with cooling water due to the influence of the working environment. The water friction loss of the motor during operation is far larger than the air friction loss of the air-cooled motor, which is one of the important factors causing the low efficiency of the submersible motor, and the selection of parameters such as the stator inner diameter, the shaft length, the air gap length and the like of the motor can greatly influence the water friction loss.
Disclosure of Invention
Therefore, the invention aims to provide a design method suitable for optimizing the efficiency of the water-filled submersible motor, which can effectively reduce the water friction loss of the water-filled submersible motor and improve the motor efficiency in a redesign stage by selecting parameters such as the inner diameter, the shaft length, the air gap length and the like of a stator of the submersible motor.
The purpose of the invention is realized by the following technical scheme:
the design method for optimizing the efficiency of the water-filled submersible motor comprises the following steps:
s1: the preliminary scheme of the electromagnetic design of the water-filled submersible motor is given according to the product specification and the technical requirement of the water-filled submersible motor;
s11, selecting the three circles and the axial length of the motor according to the technical parameters and the actual working conditions of the motor;
s12, selecting materials of the motor iron core, the winding and the conducting bar;
s13, selecting the groove shape, the size and the wire diameter of the stator and the rotor of the motor;
s2: establishing a two-dimensional time-harmonic field simulation model of the water-filled submersible motor:
the method for establishing the two-dimensional time-harmonic field simulation model of the water-filled submersible motor comprises the following steps: inputting the size of the motor and the material characteristics of each part into simulation software Flux to obtain a two-dimensional model, carrying out grid division on the two-dimensional model, and carrying out time-harmonic field simulation on the two-dimensional model;
s3: drawing a water friction loss curve of the water-filled submersible motor:
the method for drawing the water friction loss curve of the water-filled submersible motor comprises the following steps: respectively drawing curves of water friction loss along with the inner diameter of the stator and the length of the air gap according to a formula of water friction loss of the water-filled submersible motor;
s4: fitting a loss curve of the water-filled submersible motor:
the method for fitting the loss curve of the water-filled submersible motor comprises the following steps: fitting an electrical loss curve by a least square method according to the simulation result obtained in the step S2, and adding the change curves of the electrical loss along with the inner diameter of the stator and the length of the air gap to the change curves of the water friction loss along with the inner diameter of the stator and the length of the air gap respectively to obtain the change curves of the motor loss along with the inner diameter of the stator and the length of the air gap;
s5: determining the size of the motor:
the method for determining the size of the motor comprises the following steps: and determining the motor size which enables the motor efficiency to reach the optimal value according to the requirements of actual conditions and by combining the loss curve and the performance parameters of the motor.
Further, the method comprises the following steps: s6: step S2, based on the preliminary scheme of electromagnetic design, selecting the length of the inner diameter of k groups of stators by decreasing according to an arithmetic progression, selecting the length of m groups of air gaps by increasing according to an arithmetic progression, redesigning the motor for simulation, and determining the axial length of the motor according to a main size formula of the motor when the inner diameter of the stator of the motor is changed;
s7: based on the two-dimensional simulation result obtained in step S2, the efficiency of the motor is calculated.
In step S6, the motor is redesigned to meet the product specification and technical requirements.
Preferably, k in step S6 is 6-8 groups, and m in step S6 is 2-6 groups.
The method for drawing the water friction loss curve of the water-filled submersible motor in the step S3 comprises the following steps: according to the formula
Calculating the motor constant of the water-filled submersible motor, and substituting the expression L of the shaft length relative to the inner diameter of the stator and the motor constant, namely CmecP/(D12n), into the formula of the water friction loss of the water-filled submersible motor
Obtaining an expression of water friction loss as a function of stator inner diameter and air gap length, wherein: theta is dynamic viscosity, D1 is the outer diameter of the rotor, L is the length of the core wire of the motor, and omega is the synchronous angular velocity; σ is the air gapP is the mechanical power of the motor, Cmec is the motor constant.
The invention has the beneficial effects that: (1) the design method of the water-filled submersible motor is researched without depending on an empirical method to design the motor, so that the main size of the motor can be selected more accurately.
(2) The design method is suitable for optimizing the efficiency of the water-filled submersible motor, reduces water abrasion loss of the water-filled submersible motor, and improves the motor efficiency.
The method is simple to realize, obvious in efficiency improving effect and wide in universality.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application.
FIG. 1 is a flow chart of a design method for optimizing efficiency of a water-filled submersible motor;
FIG. 2 is a two-dimensional time-harmonic field simulation plot for a stator bore diameter of 225 mm;
FIG. 3 is a graph showing the variation of water abrasion loss with the inner diameter of the stator in the example;
FIG. 4 is a graph of water rub wear as a function of air gap length for the examples;
FIG. 5 is a graph of electrical loss versus air gap length for an example embodiment;
FIG. 6 is a graph of motor losses as a function of stator bore diameter for an embodiment;
fig. 7 is a graph of motor loss as a function of air gap length for the example embodiment.
The specific implementation mode is as follows:
in one embodiment, a YQ55 type wet submersible motor is taken as a research object, the rated voltage of the motor is 380V,4 poles, the rated output power is 55 kW:
s1: the preliminary scheme of the electromagnetic design of the water-filled submersible motor is given according to the product specification and the technical requirement of the water-filled submersible motor;
s11, selecting a three-circle of the motor to be 400/225/85mm and the shaft length to be 180mm according to the technical parameters and the actual working conditions of the motor;
and S12, selecting a silicon steel sheet with the mark DW540_50 as a motor iron core material, and selecting copper as a material of a winding and a conducting bar.
S13, the stator adopts a trapezoidal groove, the rotor adopts a rectangular groove, and the stator and the rotor all adopt closed grooves in order to reduce water friction loss.
S2: establishing a two-dimensional time-harmonic field simulation model of the water-filled submersible motor as shown in a second drawing, wherein the matching of a stator groove and a rotor groove, the groove type and the size are given as follows:
the method for establishing the two-dimensional time-harmonic field simulation model of the water-filled submersible motor comprises the following steps: based on the primary scheme of electromagnetic design, selecting 7 groups of stator inner diameter lengths in an incremental manner according to an arithmetic progression, selecting 4 groups of air gap lengths in an incremental manner according to the arithmetic progression, redesigning a motor, inputting the motor size and material characteristics of each part into simulation software Flux, obtaining a two-dimensional model, carrying out grid division on the two-dimensional model, carrying out time-harmonic field simulation on the two-dimensional model, and respectively showing the results of simulation calculation in tables 1 and 2;
TABLE 1 preparation of data
TABLE 2 preparation of data
| Air gap length (mm) | Stator copper loss (W) | Rotor copper consumption (W) | Stator iron loss (W) |
| 1 | 2077.32 | 1435.64 | 776.251 |
| 1.5 | 2267.75 | 1468.59 | 762.823 |
| 2 | 2476.94 | 1509.46 | 749.932 |
| 2.5 | 2697.35 | 1549.04 | 735.63 |
S3: drawing a water friction loss curve of the water-filled submersible motor:
in particular according to the formula
Calculating the motor constant of the water-filled submersible motor, and substituting the expression L of the shaft length relative to the inner diameter of the stator and the motor constant, namely CmecP/(D12n), into the formula of the water friction loss of the water-filled submersible motor
Obtaining an expression of water friction loss along with the change of the inner diameter of the stator and the length of the air gap, and respectively drawing curves of the water friction loss along with the inner diameter of the stator and the length of the air gap according to a formula of the water friction loss of the water-filled submersible motor, wherein: theta is dynamic viscosity D1 as the outer diameter of the rotor; l is the length of the motor core wire; omega is synchronous angular velocity; sigma is the length of the air gap, P is the mechanical power of the motor, Cmec is the motor constant, and specific water friction loss curves are detailed in figures 3-4.
S4: fitting a loss curve of the water-filled submersible motor:
the method for fitting the loss curve of the water-filled submersible motor comprises the following steps: according to the simulation result obtained in the step S2, it can be seen that when the inner diameter of the stator of the motor changes, the copper consumption of the stator and the rotor of the motor and the iron consumption of the stator hardly change, and can be considered as constant values approximately, so that the air gap length is taken as an independent variable and the electrical loss is taken as a dependent variable by only using a least square method, and a change curve of an electrical loss curve along with the air gap length is fitted to be shown in fig. 5, and is added to the change curves of the water friction loss along with the inner diameter of the stator and the air gap length respectively, so as to obtain a change curve of the motor loss along with the inner diameter of the stator and the air gap length as shown in fig. 6-7;
s5: determining the size of the motor:
the method of sizing a motor includes: the value range of the diameter-to-shaft length ratio of the motor is 0.7-1.3, the diameter-to-shaft length ratio is 1.22 in the embodiment, the inner diameter of a stator of the motor is 195mm, the shaft length is 239mm, and the air gap length is 2 mm.
And (5) performing two-dimensional time harmonic field simulation on the motor based on the method of the step S2, wherein the stator copper loss obtained by simulation is 2300W, the rotor copper loss is 1400W, and the stator iron loss is 710W.
And (4) substituting the size of the motor into a formula of the water friction loss of the submersible motor, and calculating the water friction loss of the optimized motor to be 953W.
The efficiency of the motor was calculated to be 88.6% from the obtained results.
The embodiment of the invention provides a design method suitable for optimizing the efficiency of a water-filled submersible motor, which improves the efficiency of the motor by combining Flux finite element analysis with Matlab fitting function, calculates the loss of each part of the motor and the performance parameters of the motor through Flux, combines the actual conditions with the loss of each part of the Matlab fitting motor along with the change of the inner diameter of a stator and the length of an air gap, and determines the size of the motor, compared with a preliminary scheme, the efficiency of the motor is improved by 1.5%, and the design method plays a guiding role in the optimization design of the motor.
Claims (4)
1. A design method suitable for optimizing efficiency of a water-filled submersible motor is characterized by comprising the following steps: the method comprises the following steps:
s1: providing a preliminary scheme of the electromagnetic design of the water-filled submersible motor according to the product specification and the technical requirement of the water-filled submersible motor;
s2: establishing a two-dimensional time-harmonic field simulation model of the water-filled submersible motor:
the method for establishing the two-dimensional time-harmonic field simulation model of the water-filled submersible motor comprises the following steps: inputting the size of the motor and the material characteristics of each part into simulation software to obtain a two-dimensional model, carrying out grid division on the two-dimensional model in the simulation software, and carrying out two-dimensional time harmonic field electromagnetic simulation on the two-dimensional model;
s3: drawing a water friction loss curve of the water-filled submersible motor:
the method for drawing the water friction loss curve of the water-filled submersible motor comprises the following steps: respectively drawing the change curves of water friction loss along with the inner diameter of the stator and the length of the air gap according to a formula of the water friction loss of the water-filled submersible motor;
according to the formula
Calculating the motor constant of the water-filled submersible motor, and substituting the expression L of the shaft length relative to the inner diameter of the stator and the motor constant, namely CmecP/(D12n), into the formula of the water friction loss of the water-filled submersible motor
Obtaining an expression of water friction loss as a function of stator inner diameter and air gap length, wherein: theta is dynamic viscosity, D1 is the outer diameter of the rotor, L is the length of the core wire of the motor, omega is synchronous angular velocity, sigma is the length of the air gap, P is the mechanical power of the motor, Cmec is the motor constant, and n is the rotating speed;
s4: fitting a loss curve q of the water-filled submersible motor:
the method for fitting the loss curve of the water-filled submersible motor comprises the following steps: fitting an electrical loss curve by a least square method according to the simulation result obtained in the step S2, and adding the change curve of the electrical loss along with the inner diameter of the stator and the length of the air gap to the change curve of the water friction loss of the water-filled submersible motor along with the inner diameter of the stator and the length of the air gap respectively to obtain the change curve of the motor loss along with the inner diameter of the stator and the length of the air gap;
s5: determining the size of the motor:
the method for determining the size of the motor comprises the following steps: and determining the motor size which enables the motor efficiency to reach the optimal value according to the requirements of actual conditions and the loss curve of the motor.
2. The design method for optimizing efficiency of a water-filled submersible motor according to claim 1, characterized in that: further comprising the steps of:
s6: step S2, based on the preliminary scheme of electromagnetic design, selecting the length of the inner diameter of k groups of stators by decreasing according to an arithmetic progression, selecting the length of m groups of air gaps by increasing according to an arithmetic progression, redesigning the motor for simulation, and determining the axial length of the motor according to a motor size formula when the inner diameter of the stator of the motor is changed;
s7: based on the two-dimensional simulation result obtained in step S2, the efficiency of the motor is calculated.
3. The design method for optimizing efficiency of a water-filled submersible motor according to claim 2, characterized in that: in step S6, the motor is redesigned to meet the product specification and technical requirements.
4. The design method for optimizing efficiency of a water-filled submersible motor according to claim 2, characterized in that: in step S6, k is 6-8, and m is 2-6 in step S6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110547334.0A CN113239593B (en) | 2021-05-19 | 2021-05-19 | Design method suitable for optimizing efficiency of water-filled submersible motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110547334.0A CN113239593B (en) | 2021-05-19 | 2021-05-19 | Design method suitable for optimizing efficiency of water-filled submersible motor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113239593A CN113239593A (en) | 2021-08-10 |
| CN113239593B true CN113239593B (en) | 2022-08-05 |
Family
ID=77137676
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110547334.0A Active CN113239593B (en) | 2021-05-19 | 2021-05-19 | Design method suitable for optimizing efficiency of water-filled submersible motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113239593B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114444308B (en) * | 2022-01-27 | 2024-02-13 | 合肥工业大学 | Design method suitable for water-filled submersible motor auxiliary tank |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010103016A1 (en) * | 2009-03-12 | 2010-09-16 | Lenze Drives Gmbh | Method for energy demand determination and method for component selection as well as a data storage medium |
| CN203278426U (en) * | 2013-05-15 | 2013-11-06 | 合肥恒大江海泵业股份有限公司 | Rotor capable of reducing water friction loss of water-filling submersible motor |
| CN104319969A (en) * | 2014-11-19 | 2015-01-28 | 芜湖杰诺瑞汽车电器系统有限公司 | Optimization design method for high-efficiency synchronous motor of new energy automobile |
| WO2018072296A1 (en) * | 2016-10-19 | 2018-04-26 | 钱伟 | Teaching and learning algorithm-based calculation method for permanent magnet synchronous motor design |
| CN110212710A (en) * | 2019-06-17 | 2019-09-06 | 北京理工大学 | A kind of automobile permanent magnet synchronous motor design method |
-
2021
- 2021-05-19 CN CN202110547334.0A patent/CN113239593B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010103016A1 (en) * | 2009-03-12 | 2010-09-16 | Lenze Drives Gmbh | Method for energy demand determination and method for component selection as well as a data storage medium |
| CN203278426U (en) * | 2013-05-15 | 2013-11-06 | 合肥恒大江海泵业股份有限公司 | Rotor capable of reducing water friction loss of water-filling submersible motor |
| CN104319969A (en) * | 2014-11-19 | 2015-01-28 | 芜湖杰诺瑞汽车电器系统有限公司 | Optimization design method for high-efficiency synchronous motor of new energy automobile |
| WO2018072296A1 (en) * | 2016-10-19 | 2018-04-26 | 钱伟 | Teaching and learning algorithm-based calculation method for permanent magnet synchronous motor design |
| CN110212710A (en) * | 2019-06-17 | 2019-09-06 | 北京理工大学 | A kind of automobile permanent magnet synchronous motor design method |
Non-Patent Citations (3)
| Title |
|---|
| Analysis of Slot Leakage Reactance of Submersible Motor with Closed Slots during Starting Transient Operation;Bao, XH等;《JOURNAL OF ELECTRICAL ENGINEERING & TECHNOLOGY》;20160131;第11卷(第1期);全文 * |
| 屏蔽电机屏蔽损耗与电机性能的计算与分析;张晓晨等;《哈尔滨工业大学学报》;20070915(第09期);全文 * |
| 高压湿式潜水电机水摩擦损耗分析;鲍晓华等;《电机与控制应用》;20121010(第10期);全文 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113239593A (en) | 2021-08-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN212323825U (en) | Permanent magnet brushless motor, robot joint, servo steering engine actuator and robot | |
| CN108566004B (en) | Rotor structure robustness design for widening rotating speed range of built-in permanent magnet synchronous motor | |
| CN113239593B (en) | Design method suitable for optimizing efficiency of water-filled submersible motor | |
| CN106528948A (en) | Teaching and learning algorithm-based calculation method for permanent magnet synchronous motor design | |
| Karpe et al. | Optimization of single-phase induction motor | |
| Ashwin et al. | Design optimization of 15 kW, 2-pole induction motor to achieve IE4 efficiency level with copper die-casting | |
| CN114139416A (en) | Method for quickly optimizing wire diameter and winding number of stator winding of high-speed motor | |
| CN107317447A (en) | A kind of reluctance motor of novel transverse magnetic flux structure | |
| Li et al. | Efficiency improvement for submersible motors by optimizing the ratio of diameter to shaft length | |
| CN104716790A (en) | 22KW permanent magnet synchronous motor design method | |
| McGuiness et al. | Novel rotor design for high-speed solid rotor induction machines | |
| Oguz et al. | Design and optimization of an axially-slitted high-speed solid rotor induction motor | |
| CN109149810A (en) | A kind of axial magnetic flux disk type switch magnetoresistance electrical machinery with rotor chute structure | |
| Cui et al. | Optimization design of high efficiency variable frequency induction motor based on finite element analysis | |
| Zhang et al. | Multi-objective optimal design of a NEMA design D three-phase induction machine utilizing gaussian-MOPSO algorithm | |
| CN107979192A (en) | A kind of Hybrid Excitation Switched Reluctance Motor of novel axial structure | |
| CN112395749A (en) | Method for designing inductance of two-pole permanent magnet solid rotor motor based on flux linkage integral method | |
| CN206412846U (en) | Frequency conversion high-speed wet type fire-proof motor stator and rotor slot fit structure | |
| CN202076902U (en) | Stator/rotor punching structure of 20 pole three-phase asynchronous motor | |
| Sprangers et al. | Design and optimization tools for high-efficiency three-phase induction motors | |
| CN103414292B (en) | Based on the Induction-type bearingless motor Optimization Design of dichotomy | |
| CN108649754A (en) | A kind of motor energy-saving rebuilding method based on threephase asynchronous operating condition | |
| Hu et al. | Analysis of Loss and Thermal Characteristics for Doubly Salient Electro-Magnetic Machine with Hollow Conductor | |
| CN106787275A (en) | Frequency conversion high-speed wet type fire-proof motor stator and rotor slot fit structure | |
| Singh et al. | Computational design and analysis of core material of single-phase capacitor run induction motor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |