CN105515321A - Electric steering device directly driven by motor - Google Patents
Electric steering device directly driven by motor Download PDFInfo
- Publication number
- CN105515321A CN105515321A CN201511024186.5A CN201511024186A CN105515321A CN 105515321 A CN105515321 A CN 105515321A CN 201511024186 A CN201511024186 A CN 201511024186A CN 105515321 A CN105515321 A CN 105515321A
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- CN
- China
- Prior art keywords
- motor
- magnetic conductor
- magnetic
- coil
- conductor
- 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.)
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
- H02K21/12—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets
- H02K21/22—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating around the armatures, e.g. flywheel magnetos
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D5/00—Power-assisted or power-driven steering
- B62D5/04—Power-assisted or power-driven steering electrical, e.g. using an electric servo-motor connected to, or forming part of, the steering gear
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/16—Stator cores with slots for windings
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/27—Rotor cores with permanent magnets
- H02K1/2706—Inner rotors
- H02K1/272—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
- H02K1/274—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets
- H02K1/2753—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets the rotor consisting of magnets or groups of magnets arranged with alternating polarity
- H02K1/278—Surface mounted magnets; Inset magnets
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Permanent Field Magnets Of Synchronous Machinery (AREA)
- Power Steering Mechanism (AREA)
Abstract
The invention relates to an electric steering device directly driven by a motor. The electric steering device comprises a motor and a driver. The middle of the motor is connected with a torsion bar structure. The motor is composed of a stator and a rotor and has at least two phases. Each phase is distributed axially uniformly. The stator is composed of a magnetizer and a coil. The coil is annually wound around a groove disposed on the magnetizer. The rotor is composed of a permanent magnet group and a rotor support. The permanent magnet group is fixed to the rotor support, is embedded in the magnetizer, and is distributed corresponding to the coil. A leading-out wire between the coil leads to the driver. The electric steering device simplifies an EPS system and expands the driving capability of the EPS system, and may achieve a motor with high power density when applied to a power-driven motor.
Description
Technical field
The invention belongs to electrically powered steering apparatus using same technical field, particularly relate to a kind of electrically powered steering apparatus using same of motor direct-drive.
Background technology
Existing pipe column type EPS, the structure that many employings servomotor slows down through turbine and worm, system configuration is complicated, simultaneously due to the existence of the drive system of big speed ratio, control performance also brings adverse influence, to the obvious adverse effect of operating handle after moment of inertia as motor is exaggerated, compare hydraulic booster system road feel blunt, fail to reach needed for manipulation high request vehicle; On the other hand from the intrinsic safety requirement of steering, when force aid system disabler, basic turning function can not disappear, due to the existence of reducing gear, after assist torque is large, inverse transmission becomes more and more difficult, and therefore electric boosting steering system is difficult to realize in high pulling torque system at present, only can use on the vehicle such as car, SUV at present, fail to use in the commercial car requiring high pulling torque.
First be there is the defects such as wearing and tearing, strain, friction and backlass, system stability retentivity is poor; After next is through transmission mechanism, motor be transmitted on steering wheel equivalent inertia large, road vibration information is suppressed, and on steering wheel operation, road feel is weak; The mechanism increased, causes that manufacture difficulty is large, cost is high.Direct drive mode is adopted effectively to solve the problem.
The EPS of motor direct-drive such as patent CN101365615B provides the scheme of a Direct driver, uses multipole magneto to carry out power steering driving.
The power-assisted scheme that CN101365615B provides, be limited by the volume restriction of the performance boundary of material and product, the peak torque provided is restricted, and when maximum current is 28.5NM more than moment of torsion during 55A12V, only can meet the power steering needs of A level vehicle.Although increase moment of torsion by the volume and drive current increasing motor, in actual vehicle, the restriction of its electric current and volume is close to design limit.As a comparison, the turbine and worm slowing-down structure EPS of existing routine is when booster torquemoment is 35NM, and electric current is less than 35A12V, and when booster torquemoment is 75NM, electric current is 80A, there is a certain distance.Because which limit its extensive use on Vehicular system, especially on the vehicle needing large booster torquemoment to drive.
According to the drive principle of magneto, the moment of torsion of motor improves by improving operating fields intensity, or the structure of expanded motor, or improves the operating current of motor within the specific limits, or improves power output weekly.
In these measures, improving operating fields intensity needs to increase the use amount of permanent magnet or uses high performance permanent magnet, and the price of high-performance permanent magnet is high, thus will significantly improve the cost of motor.CN101365615B have employed the salient pole design of permanent magnetic circuit parallel-connection structure, the operating magnetic field flux of motor has been limited to the saturation point of permeability magnetic material, the magnetic field intensity overwhelming majority that increasing permanent magnet increases is consumed in saturated magnetic circuit, and it is limited for improving performance to the utmost to motor.
Increase the output torque that electric machine structure obviously can improve motor, but the construction profile increase of motor and the weight of motor obviously equally also can be brought to increase, bring the increase of the cost of motor thus, the profile of simultaneity factor is the layout of limited vehicle interior, design is always wished the smaller the better.
The increase of the operating current of stator, is limited by the resistivity of wire and the restriction of motor profile, and when motor is determined simultaneously, copper loss is directly proportional to the current squaring of motor.EPS can short-term operation under high copper loss state, in design, during peak power, copper loss reaches 75%, then the moment of torsion increased by electric current improves very limited, and system power consumption is being restricted equally.
By improving the number of poles of the concentratred winding of motor in CN101365615B, the output torque of motor can be increased, but motor is subject to the restriction of electric machine structure while the increase of motor pole number, because space requirement holds magnetic excitation wires and stator magnetic circuit simultaneously, both are vie each other in the demand in limited space, increase that can not be unlimited.Motor pole number increases the Current drive efficiency decline of rear every pole simultaneously, and the leakage inductance ratio of every pole increases, and the moment of torsion increase that can obtain exists the limit, and the stator poles in design example has been the result after optimization.
Summary of the invention
The object of the invention is to the deficiency overcoming prior art existence, and a kind of electrically powered steering apparatus using same of motor direct-drive is provided, realize a motor direct-drive EPS, the driving torque scope that can provide can meet commercial car and use, according to the difference of specification, such as from 30NM to 150NM, the availability simultaneously on holding structure and cost and power consumption.
The object of the invention is to have come by following technical solution, comprise motor, driver, the centre of described motor is connected with torsion bar structure, and this motor is made up of stators and rotators, and the number of phases of described motor is at least two-phase, often alternate with axially etc. all distributing; Described stator is made up of magnetic conductor, coil, coils loop is wound in the groove that magnetic conductor offers, and described rotor is made up of set of permanent magnets and rotor field spider, and set of permanent magnets is fixed on rotor field spider, this set of permanent magnets is embedded on magnetic conductor, and is corresponding distribution with coil; Lead-out wire between described coil draws on driver.
As preferably, described set of permanent magnets is made by the magnetic material of NdFeB material or high-coercive force high energy product, and in axial direction magnetizes, and magnetic pole is alternately distributed; This set of permanent magnets is made up of the first magnet and the second magnet, and structure is ringwise closed to be formed by being alternately distributed, and the direction of magnetization of the first magnet and the second magnet is contrary respectively.
As preferably, described magnetic conductor forms by permeability magnetic material lamination or by the high magnetic conductivity magnetic conductor of magnetic conduction pressed by powder and auxiliary magnetic conductor, wherein high magnetic conductivity magnetic conductor is: the first magnetic conductor, the second magnetic conductor, the 5th magnetic conductor, and auxiliary magnetic conductor is: the 3rd magnetic conductor, the 4th magnetic conductor; The 3rd described magnetic conductor, the 4th magnetic conductor are compound on the second magnetic conductor, the 5th magnetic conductor.
Beneficial effect of the present invention is: simplify EPS, expands the driving force service of EPS; With the motor of design ap-plication in power drive, the motor of very high power density can be realized.
Accompanying drawing explanation
Fig. 1 is that motor master of the present invention looks cross-sectional view.
Fig. 2 is motor top view cross section structural representation of the present invention.
Fig. 3 is rotor profiles structural representation of the present invention.
Fig. 4 is magnetic conductor cross-sectional view of the present invention.
Label in accompanying drawing is respectively: 10, torsion bar structure; 11, rotor field spider; 12, set of permanent magnets; 13, magnetic conductor; 14, coil; 15, the first coil windings; 16, the second coil windings; 17, tertiary coil winding; 21, the first magnet; 22, the second magnet; 31, lead-out wire; 41, the first magnetic conductor; 42, the second magnetic conductor; 43, the 3rd magnetic conductor; 44, the 4th magnetic conductor; 45, the 5th magnetic conductor.
Embodiment
Below in conjunction with accompanying drawing, detailed introduction is done to the present invention: as shown in accompanying drawing 1 to 4, the present invention includes motor, driver, the centre of described motor is connected with torsion bar structure 10, and this motor is made up of stators and rotators, the number of phases of described motor is at least two-phase, and often alternate is that axis etc. all distributes; Described stator is made up of magnetic conductor 13, coil 14, in the groove that coil 14 circular wound is offered at magnetic conductor 13, described rotor is made up of set of permanent magnets 12 and rotor field spider 11, set of permanent magnets 12 is fixed on rotor field spider 11, this set of permanent magnets 12 is embedded on magnetic conductor 13, and with coil 14 in corresponding distribution; Lead-out wire 31 between described coil 14 draws on driver.
Described set of permanent magnets 12 is made by the magnetic material of NdFeB material or high-coercive force high energy product, and in axial direction magnetizes, and magnetic pole is alternately distributed; This set of permanent magnets 12 is made up of the first magnet 21 and the second magnet 22, and structure is ringwise closed to be formed by being alternately distributed, and the direction of magnetization of the first magnet 21 and the second magnet 22 is contrary respectively.
Described magnetic conductor 13 forms by permeability magnetic material lamination or by the high magnetic conductivity magnetic conductor of magnetic conduction pressed by powder and auxiliary magnetic conductor, wherein high magnetic conductivity magnetic conductor is: the first magnetic conductor 41, second magnetic conductor 42, the 5th magnetic conductor 45, and auxiliary magnetic conductor is: the 3rd magnetic conductor 43, the 4th magnetic conductor 44; The 3rd described magnetic conductor 43, the 4th magnetic conductor 44 are compound on the second magnetic conductor 42, the 5th magnetic conductor 45.
As common structure, there are output shaft and power shaft in the centre of motor and torsion bar structure 10 both being connected is formed, the deformation of torsion bar can be detected by transducer, thus know the torque value between input and output shaft, axle is supported by corresponding bearing (not shown), keeps self and the relative position relation between rotor and stator.
The motor driven drives by having heterogeneous motor, motor is the number of phases can be 3 phases that Fig. 1 shows, 2 phases that also can be other are more as the numbers of phases more than 4,5 phases, along with the increase of the number of phases, structural complexity can increase, axial dimension can increase, but the increase of the ride comfort of the driving that simultaneously can bring, simultaneously because alternate mutual flux coupled relation is more weak, each other can as redundancy backup, after the fault of whole system, the reliability of degraded running can increase, and the unfailing performance of machine system accesses raising.
More typical three-phase drive mode has been selected in this example.
Each occupies a coil winding position mutually, and during Fig. 1 shows, the first coil windings 15, second coil windings 16, tertiary coil winding 17 are respectively three-phase windings.
Magnetic conductor 13 is divided into multiple pole driving the position of rotor, from easily manufactured, between each phase extremely can in same angle, alternate differential seat angle can be differed by the angle of rotor and embody.Obviously, owing to not having the decoupling calls of strong driving magnetic circuit between phase, therefore specifically to require in situation also to offset between each alternate stator phase angle, rotor keeps homophase parallactic angle, or rotor, stator offset certain phase angle simultaneously.
Such as when the number of pole-pairs of motor is P, the number of phases of motor is n, and the phase angle difference between each phase is:
360/(P×n)
If the number of pole-pairs in exemplary plot 2 is 18, when motor is three phase times, each alternate phase angle difference is 6.667 degree
In order to improve magnetic field intensity and improve magnetic field configuration in application, the magnetized magnet of horizontal direction can be increased between first magnet 21 and the second magnet 22, form the permanent magnet of halbach structure, the magnetic field intensity that set of permanent magnets 12 externally shows is larger, the leakage flux of permanent magnetic field is less, and the available moment of torsion of obvious motor is also larger.
The coil 14 difference circular wound of each phase is in the groove of magnetic conductor 13.Outlet can be connected, by driver drives with star, triangle or other modes between coil 14.Time normal when motor runs, electric current equals 0 by total resultant magnetic field electric current of coil, and motor stator does not totally externally show magnetic field in the axial direction.
The lead-out wire 31 of each phase coil 14 can be drawn, as the 3rd magnetic conductor 43 place in figure from the non-key magnetic conduction of stator.
The concentrating coil of circular ring type has the highest excitation efficiency, and namely the wire of same length can provide maximum magnetic field intensity and magnetic flux.Can ensure like this to produce identical magnetic field in minimum resistance loss situation, or provide the magnetic field of ceiling capacity when same loss.
First magnetic conductor 41, second magnetic conductor 42, the 5th magnetic conductor 45 are the magnetic conductor 13 of high magnetic property material, and the silicon steel sheet stamping-out lamination of high magnetic conductivity can be had to become corresponding shape, also can be suppressed forming by powder magnetic conductor.The magnetic circuit formed has high saturation flux and low magnetic conduction loss;
3rd magnetic conductor 43, the 4th magnetic conductor 44 are auxiliary magnetic conductor, by increasing magnetic conduction cross section, sharing the part magnetic flux of the second magnetic conductor 42, the 5th magnetic conductor 45, forming by permeability magnetic material lamination or by magnetic conduction pressed by powder.3rd magnetic conductor 43, the 4th magnetic conductor 44 bear the requirement improving the stator shaft orientation rigidity of structure simultaneously.High magnetic resistance district is needed between the outer field magnetic conductor of the 3rd magnetic conductor 43, can empty or filling non-magnet material.
Be combined with the structure of statoric multipolar, relatively common motor, the structure of multipole can be realized simultaneously, keep the highest conductor efficiency simultaneously, and electric machine structure be simple.
The increase of the number of poles of motor, is equivalent to the number of motors of simultaneously parallel operation in increase, obviously can the output torque value of raising motor in proportion, and this low-speed big at EPS etc. is be consistent on driving and requiring.
Certainly, the increase of number of poles is also conditional, permanent magnet alternatively distributed on rotor can because the leakage field in space, progressively can weaken, the space leakage field wherein between magnet along with the increase in magnetic pole cycle the useful effect of stator, be principal element, adopt Halbach structure, can slow down this effect to a certain extent, but total trend still can not change, the structure of permanent magnet is by complexity simultaneously.Little rotor work breath can reduce this leakage field effect.
On the other hand, the breath leakage field of rotor is also utilizable, in order to ensure that the back-emf of motor is sinuso sine protractor, stable driving torque can be provided easily, the leakage field of permanent magnetism magnetic pole can make output magnetic field closer to sine under the magnetic pole of one fixed width, makes inevitable leakage field play the effect in some fronts.
The increase of set of permanent magnets 12 number of poles, improves from the frequency requirement driven being shown as to the drive current of motor, simultaneously in order to ensure the consistent of drive current, and the raising of corresponding driving voltage.Certainly, also can be adjusted by the number of turn of winding, change the inductance of the stator of motor, thus the voltage request of coupling motor.
A design example is:
Motor has substantially equal ac-dc axis inductance, details is controlled by the profile of permanent magnet and the control in magnetic field of magnetizing, and can realize close extremely descend Distribution of Magnetic Field, and the smooth-going control of the moment of torsion for motor provides basic.
Each phase of above-mentioned motor all has independently driving force, the fluctuation of dead band and actuating force is there is when just driving separately, namely can realize continuous print when there being two phase times and turn to driving, the ride comfort of just torque can than low during the design number of phases, and this is acceptable when system failure degraded running.When there being three-phase or more phase time, along with the increase of the number of phases, the redundant ability of fault is increased simultaneously.
The present invention compared with prior art, has the following advantages:
By improving the structure of motor, improving the driving moment carrying out motor, reaching the requirement fully meeting Direct driver.
Motor has simple structure, low cost of manufacture.
Relative to the EPS of the worm decelerating machine structure of routine, the EPS that can adapt to more large gauge drives, and simultaneously because rotor has minimum moment of inertia, can obtain sensitive road feel feedback effects, fundamentally realize the outstanding operating handle close to HPS.
By increasing external diameter and the height of motor, the moment of torsion that motor provides can increase in proportion with the volume of motor, and obvious motor can realize the driving force of more high pulling torque, for the high pulling torque EPS that conventional reducing gear can not drive.
Relative to CN101365615B design, electric machine structure is simple, extremely descends magnetic field by trapezoidal single form, and be improved to the forms such as sinusoidal or trapezoidal, the torque ripple of control realization is less, improves the ride comfort shortcoming of the intrinsic low speed torque of this design.This motor has higher drive efficiency.Namely same or less electric current can realize larger moment of torsion and export.
Motor Coupling Between Phases is minimum, can realize mutual redundancy backup between phase and phase, and the wheel steering system high to security requirement provides highly reliable driving function.
The present invention is not limited to above-mentioned execution mode, no matter do any change, every employing structural design provided by the present invention on its shape or material are formed, is all one distortion of the present invention, all should thinks within scope.
Claims (3)
1. the electrically powered steering apparatus using same of a motor direct-drive, comprise motor, driver, it is characterized in that: the centre of described motor is connected with torsion bar structure (10), and this motor is made up of stators and rotators, the number of phases of described motor is at least two-phase, and often alternate is that axis etc. all distributes; Described stator is made up of magnetic conductor (13), coil (14), in the groove that coil (14) circular wound is offered at magnetic conductor (13), described rotor is made up of set of permanent magnets (12) and rotor field spider (11), set of permanent magnets (12) is fixed on rotor field spider (11), this set of permanent magnets (12) is embedded on magnetic conductor (13), and with coil (14) in corresponding distribution; Lead-out wire (31) between described coil (14) draws on driver.
2. the electrically powered steering apparatus using same of motor direct-drive according to claim 1, it is characterized in that: described set of permanent magnets (12) is made by the magnetic material of NdFeB material or high-coercive force high energy product, and in axial direction magnetize, magnetic pole is alternately distributed; This set of permanent magnets (12) is made up of the first magnet (21) and the second magnet (22), and by being alternately distributed, structure is ringwise closed to be formed, and the direction of magnetization of the first magnet (21) and the second magnet (22) is contrary respectively.
3. the electrically powered steering apparatus using same of motor direct-drive according to claim 1, it is characterized in that: described magnetic conductor (13) forms by permeability magnetic material lamination or by the high magnetic conductivity magnetic conductor of magnetic conduction pressed by powder and auxiliary magnetic conductor, wherein high magnetic conductivity magnetic conductor is: the first magnetic conductor (41), the second magnetic conductor (42), the 5th magnetic conductor (45), and auxiliary magnetic conductor is: the 3rd magnetic conductor (43), the 4th magnetic conductor (44); The 3rd described magnetic conductor (43), the 4th magnetic conductor (44) are compound on the second magnetic conductor (42), the 5th magnetic conductor (45).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511024186.5A CN105515321A (en) | 2015-12-31 | 2015-12-31 | Electric steering device directly driven by motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511024186.5A CN105515321A (en) | 2015-12-31 | 2015-12-31 | Electric steering device directly driven by motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105515321A true CN105515321A (en) | 2016-04-20 |
Family
ID=55723063
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201511024186.5A Pending CN105515321A (en) | 2015-12-31 | 2015-12-31 | Electric steering device directly driven by motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105515321A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106741161A (en) * | 2016-08-29 | 2017-05-31 | 佛山市帝盟汽车零部件有限公司 | A kind of many magnetic pole drive devices for being applied to automobile booster |
| CN113394922A (en) * | 2020-03-13 | 2021-09-14 | 中车永济电机有限公司 | Permanent magnet motor adjusting method, device, equipment and storage medium |
| CN113422493A (en) * | 2021-06-24 | 2021-09-21 | 北京瑞控信科技有限公司 | High-performance limited rotation brake |
| CN114755580A (en) * | 2022-06-13 | 2022-07-15 | 中国科学院宁波材料技术与工程研究所 | Performance testing device and testing method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101177147A (en) * | 2007-11-23 | 2008-05-14 | 浙江大学 | Electric turning booster system |
| CN101189782A (en) * | 2005-05-24 | 2008-05-28 | 株式会社电装 | Electromotor and its control device |
| CN101365615A (en) * | 2005-08-19 | 2009-02-11 | “卡卢斯基扎沃德电子工业”股份有限公司 | Car steering wheel electromechanical booster |
| CN205319912U (en) * | 2015-12-31 | 2016-06-15 | 万向钱潮传动轴有限公司 | Electronic device that turns to of motor direct drive |
-
2015
- 2015-12-31 CN CN201511024186.5A patent/CN105515321A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101189782A (en) * | 2005-05-24 | 2008-05-28 | 株式会社电装 | Electromotor and its control device |
| CN101365615A (en) * | 2005-08-19 | 2009-02-11 | “卡卢斯基扎沃德电子工业”股份有限公司 | Car steering wheel electromechanical booster |
| CN101177147A (en) * | 2007-11-23 | 2008-05-14 | 浙江大学 | Electric turning booster system |
| CN205319912U (en) * | 2015-12-31 | 2016-06-15 | 万向钱潮传动轴有限公司 | Electronic device that turns to of motor direct drive |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106741161A (en) * | 2016-08-29 | 2017-05-31 | 佛山市帝盟汽车零部件有限公司 | A kind of many magnetic pole drive devices for being applied to automobile booster |
| CN113394922A (en) * | 2020-03-13 | 2021-09-14 | 中车永济电机有限公司 | Permanent magnet motor adjusting method, device, equipment and storage medium |
| CN113394922B (en) * | 2020-03-13 | 2022-06-14 | 中车永济电机有限公司 | Permanent magnet motor adjusting method, device, equipment and storage medium |
| US11863109B2 (en) | 2020-03-13 | 2024-01-02 | Crrc Yongji Electric Co., Ltd. | Method and device for adjusting permanent magnet motor, equipment, and storage medium |
| CN113422493A (en) * | 2021-06-24 | 2021-09-21 | 北京瑞控信科技有限公司 | High-performance limited rotation brake |
| CN114755580A (en) * | 2022-06-13 | 2022-07-15 | 中国科学院宁波材料技术与工程研究所 | Performance testing device and testing method |
| CN114755580B (en) * | 2022-06-13 | 2022-12-16 | 中国科学院宁波材料技术与工程研究所 | Performance testing device and testing method |
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Application publication date: 20160420 |
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