CN102522835B - Brushless direct current permanent magnet motor having characteristics of low noise, low vibration and low temperature rise and assembly technology thereof - Google Patents
Brushless direct current permanent magnet motor having characteristics of low noise, low vibration and low temperature rise and assembly technology thereof Download PDFInfo
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- CN102522835B CN102522835B CN201110443592.0A CN201110443592A CN102522835B CN 102522835 B CN102522835 B CN 102522835B CN 201110443592 A CN201110443592 A CN 201110443592A CN 102522835 B CN102522835 B CN 102522835B
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Abstract
The invention relates to a brushless direct current permanent magnet motor having characteristics of low noise, low vibration and low temperature rise. The brushless direct current permanent magnet motor consists of a motor rotor, a motor stator, a front end cap, a motor housing and a rear end cap. The front end cap and the rear end cap are sealedly installed at two ends of the motor housing to form an integral motor housing; the motor stator is arranged inside the motor housing; and the motor rotor is installed inside the motor stator. The brushless direct current permanent magnet motor is characterized in that: an iron core of the motor stator is formed by lamination of a plurality of punching sheets that are manufactured by Fe-Ni soft magnetic alloy; the punching sheets are in a circular ring shape and grooves that are arranged regularly are made on inner circles. When the plurality of punching sheets are laminated, an angle is formed by staggering of the grooves of adjacent punching sheets, so that a chute is formed at a stator slot; and an enameled wire is wound in the chute. According to the invention, a heat dispersion performance, a stator lamination mode and a balancing performance are improved; therefore, the motor has characteristics of high rotating speed, low noise, low vibration and low temperature rise as well as is suitable for application to a special using occasion. When the motor that is assembled by the assembly technology in the invention works at 7000RPM, the temperature rise is not more than 12 DEG C and the noise is less than 60dB.
Description
Technical field
The present invention relates to the technical fields such as power electronics, machinery, it is a kind of brushless direct current permanent magnet motor that need to manufacture under the condition of the Special use occasions such as high rotating speed, low noise, low vibration and low-temperature-rise.
Background technology
Brushless DC motor (Brushless Direct Current Motor-BLDCM) claim again direct current permanent magnet motor, or permagnetic synchronous motor.Replace the carbon brush commutator with Hall element, the permanent magnetic material that the neodymium iron boron of take is rotor, thus make motor performance surmount all advantages of traditional direct current machine, the while has solved again the shortcoming of carbon brush of direct current motor slip ring.This machine operation is when 7000RPM, and temperature rise is not more than 12 ℃, and noise is less than 60dB, guarantee the These characteristics of motor when high speed operation, and traditional design of electrical motor and assembling are difficult to guarantee.
The vibration of motor derives from the precision of electric machine rotor and the precision coordinated is installed.The thermal losses of motor derives from the copper loss of bearing thermal losses and motor.For above requirement, just must make special consideration and requirement to the design of motor.If thermal source and vibration source are not controlled and will be made motor temperature rise when the work too high, vibration and noise are excessive, can't guarantee the Special use requirement of motor.
Summary of the invention
The present invention seeks to design a kind of brushless DC permanent-magnet motor with low noise, low vibration and low-temperature-rise characteristic, provide a kind of applicable assembly technology, with the manufacture that meets low noise, hangs down the brushless DC permanent-magnet motor of vibration and low-temperature-rise characteristic simultaneously.
Specifically, there is the brushless DC permanent-magnet motor of low noise, low vibration and low-temperature-rise characteristic, comprise rotor, motor stator, front end housing, electric machine casing, rear end cap; Front end housing and rear end cap sealing are arranged on the electric machine casing two ends and form the integrated motor shell, and motor stator is positioned at electric machine casing, and rotor is arranged in motor stator; It is characterized in that motor stator core is that a plurality of punching dislocation that fe-Ni soft magnetic alloy is made laminate formation, punching is to be shaped with regularly arranged groove on annular and inner circle; When a plurality of punchings laminate, thereby the groove of the adjacent punching angle that staggers makes stator slot form a skewed slot, and enamelled wire is wound in this skewed slot.
Described rotor consists of motor shaft, rear bearing, magnetic steel of motor, fore bearing, and the motor shaft two ends are arranged on rear end cap and front end housing by rear bearing and fore bearing respectively, and magnetic steel of motor is fixed on the motor shaft middle part by casting glue; Described rear bearing and fore bearing are the single-groove grooved ball bearing with dust cap, and described forward and backward bearing inner ring and motor shaft are interference fit, and the magnitude of interference is in 0.01mm; Fore bearing and electric machine casing are interference fit, and rear bearing and electric machine casing are matched in clearance.
Be shaped with the heat radiation gusset for reducing electric machine temperature rise on electric machine casing.
The above-mentioned assembly technology with brushless DC permanent-magnet motor of low noise, low vibration and low-temperature-rise characteristic is characterized in that in installation step comprising following three process control procedures:
(1) control of thermal source:
A) the single-groove grooved ball bearing of select tape dust cap, to guarantee low-loss and the stationarity of bearing electric machine under load;
B) selecting front and back bearings inner ring and main shaft is interference fit, and the magnitude of interference is in 0.01mm; Fore bearing and shell are interference fit, and the mode that rear bearing and shell are matched in clearance reduces the heating of electric current and motor stator winding;
(2) motor stator and laminating.
The material of motor stator core adopts the 1J50 fe-Ni soft magnetic alloy, and stator adopts skewed slot to laminate the Cogging torque that technology reduces rotor while laminating, and reduces noise, improves the requirement of stability of rotation;
(3) rotor encapsulating and dynamic balancing are controlled: the reliably stationarity when working of by motor rotor magnetic steel, being undertaken that embedding guarantees that magnetic steel of motor is connected with rotor.
(4) rotor is carried out to whole dynamic balancing, and guarantee that allowable amount of unbalance is at 7000RPM.
For reaching high rotating speed, the designing requirement of high stability, the dimensional accuracy of each main element and morpheme require stricter, and matching surface and the piece surface precision very high.Rotor, by special technique, has guaranteed the high reliability of product, and through strict dynamic balancing, the low vibration while having guaranteed High Rotation Speed.That makes is designed with three parts, and respectively: 1, motor front end cover is designed with ring flange, for the connection of motor.2, motor housing is designed with the heat radiation gusset, plays the effect of heat radiation.3, motor stator adopts skewed slot to laminate, and has reduced the teeth groove pulsation in the machine operation, has guaranteed the stationarity of machine operation.By above improvement, motor of the present invention has the characteristic of high rotating speed, low noise, low vibration and low-temperature-rise, is adapted at the Special use occasion and uses, and according to the present invention, the machine operation of technique assembling is when 7000RPM, and temperature rise is not more than 12 ℃, and noise is less than 60dB.
The accompanying drawing explanation
Fig. 1 is external structure schematic diagram of the present invention.
Fig. 2 is rotor structure schematic diagram of the present invention.
Fig. 3 is stator scheme of installation of the present invention.
Fig. 4 is stator structure schematic diagram of the present invention.
Embodiment
As shown in Figure 1, in structure and assembling, the improvement made is mainly for the motor profile:
The first, the control of thermal source
The thermal source of motor has two aspects, and one is that the motor winding causes, another is that bearing friction causes.When motor is not installed on support, thermal losses is greatly about 19.2W.In order to reduce the bearing thermal losses, control the stationarity of motor High Rotation Speed simultaneously, the single-groove grooved ball bearing of select tape dust cap, guarantee low-loss and the stationarity of bearing electric machine under load.
The mounting means of bearing is also very large to influence on Harmonic Armature, and concrete structure as shown in Figure 2.This machine operation, at 7000RPM, belongs to high-speed rotary motor, and bearing is installed and is installed as the master with interference, but the magnitude of interference is very large to the current affects of motor.The magnitude of interference is excessive, install reliable, but can cause electric current sharply to increase simultaneously, the severe overweight that causes that the motor feels hot.So selecting front and back bearings inner ring and main shaft is interference fit, the magnitude of interference is in 0.01mm.Fore bearing and shell are interference fit, and rear bearing and shell are matched in clearance.So just taken into account and installed and used the impact that requires and expand with heat and contract with cold electric machine main shaft is caused.
Control the mounting means of bearing, reduced electric current, also just reduced the heating of motor stator winding simultaneously.
In addition, motor housing is designed with the heat radiation gusset simultaneously, also can reduce electric machine temperature rise.
The second, motor stator and laminating.
The material of motor stator core adopts the 1J50 fe-Ni soft magnetic alloy, and this material has and has higher saturation induction density and magnetic permeability.When stator laminates, adopt skewed slot to laminate technology, can further reduce like this Cogging torque of rotor, reduced noise, improve the requirement of stability of rotation.Specific practice is when the laminating of stator punching, and by first and an angle [alpha] of second punching rotation, laminates like this until whole stator completes, thereby makes stator slot shape at an angle.When stator winding, enamelled wire is coiling in this angled skewed slot just.After motor has assembled, will reduce the Cogging torque of motor.Skewed slot form and structure are as Fig. 3, shown in Fig. 4.
Three, rotor encapsulating and dynamic balancing.
For guaranteeing the even running of motor, need to carry out embedding to motor rotor magnetic steel, the reliably stationarity when working that guarantees that magnetic steel of motor is connected with rotor.Rotor is stainless steel, and specific practice is that the magnet steel first motor used is fixed on rotor with glue, guarantees that epitrochanterian neodymium-iron-boron magnetic material installation is reliable, firmly.After adhesive curing, to whole rotor, use epoxy sealing glue to carry out whole embedding, finally more unnecessary fluid sealant is got rid of.Thereby guarantee consistency and the reliability of rotor size.
Finally rotor is carried out to whole dynamic balancing, guarantee that allowable amount of unbalance reaches requirement when 7000RPM, thereby the stationarity while guaranteeing the motor high speed rotating and low the vibration are reduced the noise of machine operation.
Claims (1)
1. there is the brushless DC permanent-magnet motor of low noise, low vibration and low-temperature-rise characteristic, comprise rotor, motor stator, front end housing (2), electric machine casing (3), rear end cap (4); Front end housing (2) and rear end cap (4) sealing are arranged on electric machine casing (3) two ends and form the integrated motor shell, and motor stator is positioned at electric machine casing (3), and rotor is arranged in motor stator; It is characterized in that motor stator core is that a plurality of punching dislocation that fe-Ni soft magnetic alloy is made laminate formation, punching is to be shaped with regularly arranged groove on annular and inner circle; When a plurality of punchings laminate, thereby the groove of the adjacent punching angle that staggers makes stator slot form a skewed slot, and enamelled wire is wound in this skewed slot;
Described rotor consists of motor shaft (1), rear bearing (5), magnetic steel of motor (6), fore bearing (8), motor shaft (1) two ends are arranged on rear end cap (4) by rear bearing (5) and fore bearing (8) respectively and front end housing (2) is upper, and magnetic steel of motor (6) is fixed on motor shaft (1) middle part by casting glue (7); Described rear bearing (5) and fore bearing (8) are the single-groove grooved ball bearing with dust cap, and described forward and backward bearing inner ring and motor shaft are interference fit, and the magnitude of interference is in 0.01mm; Fore bearing and electric machine casing are interference fit, and rear bearing and electric machine casing are matched in clearance; And be shaped with the heat radiation gusset for reducing electric machine temperature rise on electric machine casing;
Above-mentioned brushless DC permanent-magnet motor installation step comprises following three process control procedures simultaneously:
(1) control of thermal source:
A) the single-groove grooved ball bearing of select tape dust cap, to guarantee low-loss and the stationarity of motor under load;
B) selecting front and back bearings inner ring and main shaft is interference fit, and the magnitude of interference is in 0.01mm; Fore bearing and shell are interference fit, and the mode that rear bearing and shell are matched in clearance reduces the heating of electric current and motor stator winding;
(2) motor stator and laminating:
The material of motor stator core adopts the 1J50 fe-Ni soft magnetic alloy, and stator adopts skewed slot to laminate the Cogging torque that technology reduces rotor while laminating, and reduces noise, improves the requirement of stability of rotation; Motor stator laminates specific practice: when stator punching laminates, first and second punching are rotated to an angle, laminate like this until whole stator completes, thereby make stator slot shape at an angle; During stator winding, enamelled wire is coiling in this angled skewed slot just;
(3) rotor encapsulating and dynamic balancing are controlled: the stationarity when by motor rotor magnetic steel, carrying out reliability that embedding guarantees that magnetic steel of motor is connected with rotor and working; Rotor adopts stainless steel, and specific practice is: the magnet steel first motor used is fixed on rotor with glue; After adhesive curing, to whole rotor, use epoxy sealing glue to carry out whole embedding, finally more unnecessary fluid sealant is got rid of; Rotor is carried out to whole dynamic balancing, and guarantee that allowable amount of unbalance is at 7000RPM.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110443592.0A CN102522835B (en) | 2011-12-27 | 2011-12-27 | Brushless direct current permanent magnet motor having characteristics of low noise, low vibration and low temperature rise and assembly technology thereof |
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| CN201110443592.0A CN102522835B (en) | 2011-12-27 | 2011-12-27 | Brushless direct current permanent magnet motor having characteristics of low noise, low vibration and low temperature rise and assembly technology thereof |
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| CN102522835B true CN102522835B (en) | 2014-01-08 |
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| CN108144832A (en) * | 2016-12-05 | 2018-06-12 | 南京圣威惠众机电技术有限公司 | A kind of rotation vibrator of quick adjusting exciting force |
| CN108832754B (en) * | 2018-05-31 | 2020-06-19 | 东阳市中兴电机有限公司 | Dustproof new energy automobile motor that just exports stably |
| CN112059902A (en) * | 2020-08-18 | 2020-12-11 | 广州市昊志机电股份有限公司 | Air-floatation motorized spindle and grinding machine tool |
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| CN100448141C (en) * | 2006-10-16 | 2008-12-31 | 中山大学 | Alternating current permanent-magnet water-submersible electric machine |
| JP5304524B2 (en) * | 2009-08-07 | 2013-10-02 | 株式会社ジェイテクト | Inner and outer rings and ball bearings |
| CN201478977U (en) * | 2009-09-01 | 2010-05-19 | 郑云峰 | Rare-earth permanent brushless direct current motor of oil extractor of oil field |
| CN102255445A (en) * | 2010-05-19 | 2011-11-23 | 蔡圣君 | Method for manufacturing stator module of skewed slot |
| CN202475051U (en) * | 2011-12-27 | 2012-10-03 | 宝鸡航天华科机电工业有限公司 | Brushless DC permanent magnetism motor with low noise, low vibration, and low temperature rise characteristics |
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Effective date of registration: 20161010 Address after: 430056 hi tech park, Wuhan economic and Technological Development Zone, Hubei Patentee after: China Aerospace Times Electronics Co., Ltd. Address before: Baoji City, Shaanxi Province, 721000 West Road Weibin District No. 43 Patentee before: Shaanxi Aerospace Navigation Equipment Co., Ltd. |
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