CN102522835A - 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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- CN102522835A CN102522835A CN2011104435920A CN201110443592A CN102522835A CN 102522835 A CN102522835 A CN 102522835A CN 2011104435920 A CN2011104435920 A CN 2011104435920A CN 201110443592 A CN201110443592 A CN 201110443592A CN 102522835 A CN102522835 A CN 102522835A
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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 technical fields such as power electronics, machinery, it is a kind of brushless direct current permanent magnet motor that need under the condition of special use occasions such as high rotating speed, low noise, low vibration and low temperature rise, manufacture.
Background technology
Brushless DC motor (Brushless Direct Current Motor-BLDCM) claim direct current permanent magnet motor again, or permagnetic synchronous motor.Replacing the carbon brush commutator with Hall element, is the permanent magnetic material of rotor with the neodymium iron boron, thereby makes motor performance surmount all advantages of traditional direct current machine, and the while has solved the shortcoming of direct current machine carbon brush slip-ring again.This machine operation is when 7000RPM, and temperature rise is not more than 12 ℃, and noise will guarantee the These characteristics of motor when high speed operation less than 60dB, and traditional design of electrical motor is difficult to guarantee with assembling.
The vibration of motor derives from the precision and the precision that cooperation is installed of electric machine rotor.The thermal losses of motor derives from the copper loss of bearing thermal losses and motor.To above requirement, just must make special consideration and requirement to motor design.Will not make motor temperature rise when the work too high if thermal source and vibration source are not controlled, vibration and noise are excessive, can't guarantee the special instructions for use of motor.
Summary of the invention
The present invention seeks to design a kind of brushless direct-current permanent magnet motor, a kind of suitable assembly technology is provided simultaneously, with the manufacturing of satisfying low noise, hanging down the brushless direct-current permanent magnet motor of vibration and low temperature rise characteristic with low noise, low vibration and low temperature rise characteristic.
Specifically, have the brushless direct-current 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 installed in the electric machine casing two ends and constitute whole motor housing, and motor stator is positioned at electric machine casing, and rotor is installed in the motor stator; It is characterized in that motor stator core is that a plurality of punching dislocation that fe-Ni soft magnetic alloy is processed laminate formation, punching is to be shaped on regularly arranged groove on annular and the interior circle; Thereby the groove of the adjacent punching angle that staggers made stator slot form a skewed slot when a plurality of punchings laminated, and enamelled wire is wound in this skewed slot.
Said rotor is made up of motor shaft, rear bearing, magnetic steel of motor, fore bearing, and the motor shaft two ends are installed on rear end cap and the front end housing through rear bearing and fore bearing respectively, and magnetic steel of motor is fixed on the motor shaft middle part through casting glue; Said rear bearing and fore bearing are the single-groove grooved ball bearing of band dust cap, and said forward and backward bearing inner race 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 on the heat radiation gusset that is used to reduce electric machine temperature rise on the electric machine casing.
Above-mentioned assembly technology with brushless direct-current permanent magnet motor of low noise, low vibration and low temperature rise characteristic is characterized in that comprising in the installation step following three process control procedures:
(1) control of thermal source:
A) the single-groove grooved ball bearing of select tape dust cap is to guarantee the 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 rear bearing and shell are the heating that the mode of matched in clearance reduces 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 the skewed slot technology of laminating to reduce the teeth groove pulsating torque of rotor when laminating, and reduces noise, improves the requirement of stability of rotation property;
(3) rotor encapsulating and dynamic balancing control: through motor rotor magnetic steel carry out that embedding guarantees that magnetic steel of motor is connected with rotor reliable with the stationarity when working.
(4) rotor is carried out 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 relatively stricter, and matching surface and piece surface precision are very high.Rotor has guaranteed the high reliability of product through special technology, and through strict dynamic balancing, the low vibration when having guaranteed high speed rotating.That makes is designed with three parts, and be respectively: 1, the motor front end housing is designed with ring flange, is used 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.Through 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 special use occasion and uses, and the machine operation of technology assembling is when 7000RPM according to the present invention, and temperature rise is not more than 12 ℃, and noise is less than 60dB.
Description of drawings
Fig. 1 is an external structure sketch map of the present invention.
Fig. 2 is a rotor structure sketch map of the present invention.
Fig. 3 is a stator scheme of installation of the present invention.
Fig. 4 is a stator structure sketch map of the present invention.
Embodiment
The motor profile is as shown in Figure 1, and the improvement of making in structure and the assembling mainly is:
The first, the control of thermal source
The thermal source of motor has two aspects, and one is that motor windings causes, another is that bearing friction causes.When motor was not installed on the support, thermal losses was greatly about 19.2W.In order to reduce the bearing thermal losses, control the stationarity of motor high speed rotating simultaneously, the single-groove grooved ball bearing of select tape dust cap guarantees low-loss and the stationarity of bearing electric machine under load.
The mounting means of bearing is also very big to the motor performance influence, and concrete structure is as shown in Figure 2.This machine operation belongs to high-speed rotary motor at 7000RPM, and Bearing Installation is installed as the master with interference, but the magnitude of interference is very big to the current affects of motor.The magnitude of interference is excessive, reliable installation, 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 influence 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.Adopt skewed slot to laminate technology when stator laminates, can further reduce the teeth groove pulsating torque of rotor like this, reduced noise, improve the requirement of stability of rotation property.Specific practice is when the laminating of stator punching, and with angle [alpha] of first and second punching rotation, laminates like this up to whole stator and accomplishes, thereby make stator slot shape at an angle.When stator winding, enamelled wire is coiling in this angled skewed slot just.After the motor assembling is accomplished, will reduce the teeth groove pulsating torque of motor.Skewed slot form and structure such as Fig. 3, shown in Figure 4.
Three, rotor encapsulating and dynamic balancing.
For guaranteeing the even running of motor, need carry out embedding to motor rotor magnetic steel, guarantee that magnetic steel of motor is connected with rotor reliable and the stationarity when working.Rotor is a stainless steel, and specific practice is that the magnet steel that earlier motor is used is fixed on the rotor with glue, guarantees epitrochanterian neodymium-iron-boron magnetic material reliable installation, firmly.After treating adhesive curing, use epoxy sealing glue to carry out whole embedding, more unnecessary fluid sealant is got rid of at last whole rotor.Thereby guarantee the consistency and the reliability of rotor size.
At last rotor is carried out whole dynamic balancing, guarantee that allowable amount of unbalance reaches requirement when 7000RPM, thereby stationarity and low vibration when guaranteeing the motor high speed rotating reduce the noise of machine operation.
Claims (7)
1. have the brushless direct-current 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 installed in electric machine casing (3) two ends and constitute whole motor housing, and motor stator is positioned at electric machine casing (3), and rotor is installed in the motor stator; It is characterized in that motor stator core is that a plurality of punching dislocation that fe-Ni soft magnetic alloy is processed laminate formation, punching is to be shaped on regularly arranged groove on annular and the interior circle; Thereby the groove of the adjacent punching angle that staggers made stator slot form a skewed slot when a plurality of punchings laminated, and enamelled wire is wound in this skewed slot.
2. the brushless direct-current permanent magnet motor with low noise, low vibration and low temperature rise characteristic according to claim 1; It is characterized in that rotor is made up of motor shaft (1), rear bearing (5), magnetic steel of motor (6), fore bearing (8); Motor shaft (1) two ends are installed on rear end cap (4) and the front end housing (2) through rear bearing (5) and fore bearing (8) respectively, and magnetic steel of motor (6) is fixed on motor shaft (1) middle part through casting glue (7); Said rear bearing (5) and fore bearing (8) are the single-groove grooved ball bearing of band dust cap, and said forward and backward bearing inner race 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.
3. the brushless direct-current permanent magnet motor with low noise, low vibration and low temperature rise characteristic according to claim 1 and 2 is characterized in that being shaped on the electric machine casing heat radiation gusset that is used to reduce electric machine temperature rise.
4. have the assembly technology of the brushless direct-current permanent magnet motor of low noise, low vibration and low temperature rise characteristic, it is characterized in that comprising in the installation step following three process control procedures:
(1) control of thermal source:
A) the single-groove grooved ball bearing of select tape dust cap is to guarantee the 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 rear bearing and shell are the heating that the mode of matched in clearance reduces 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 the skewed slot technology of laminating to reduce the teeth groove pulsating torque of rotor when laminating, and reduces noise, improves the requirement of stability of rotation property;
(3) rotor encapsulating and dynamic balancing control: through motor rotor magnetic steel carry out that embedding guarantees that magnetic steel of motor is connected with rotor reliable with the stationarity when working.
(4) rotor is carried out whole dynamic balancing, and guarantee that allowable amount of unbalance is at 7000RPM.
5. the assembly technology of brushless direct-current permanent magnet motor according to claim 4 is characterized in that motor housing is designed with the heat radiation gusset simultaneously and is used to reduce electric machine temperature rise.
6. the assembly technology of brushless direct-current permanent magnet motor according to claim 4; It is characterized in that motor stator laminates specific practice and is: when the laminating of stator punching; With angle of first and second punching rotation; Laminate like this up to whole stator and accomplish, thereby make stator slot shape at an angle; During stator winding, enamelled wire is coiling in this angled skewed slot just.
7. the assembly technology of brushless direct-current permanent magnet motor according to claim 4 is characterized in that step (3) rotor adopts stainless steel, and specific practice is: the magnet steel that earlier motor is used is fixed on the rotor with glue; After treating adhesive curing, use epoxy sealing glue to carry out whole embedding, more unnecessary fluid sealant is got rid of at last whole rotor.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| 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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| CN102522835A true CN102522835A (en) | 2012-06-27 |
| CN102522835B CN102522835B (en) | 2014-01-08 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN108832754A (en) * | 2018-05-31 | 2018-11-16 | 深圳市中科智诚科技有限公司 | New energy automobile motor a kind of dust-proof and that output is stable |
| 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 |
| CN112467953A (en) * | 2020-09-24 | 2021-03-09 | 常州祥明智能动力股份有限公司 | Built-in drive integration permanent magnet brushless motor structure |
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| CN1937371A (en) * | 2006-10-16 | 2007-03-28 | 中山大学 | Alternating current permanent-magnet water-submersible electric machine |
| CN201478977U (en) * | 2009-09-01 | 2010-05-19 | 郑云峰 | Rare-earth permanent brushless direct current motor of oil extractor of oil field |
| JP2011038563A (en) * | 2009-08-07 | 2011-02-24 | Jtekt Corp | Inner ring and outer ring, and ball bearing |
| 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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2011
- 2011-12-27 CN CN201110443592.0A patent/CN102522835B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1937371A (en) * | 2006-10-16 | 2007-03-28 | 中山大学 | Alternating current permanent-magnet water-submersible electric machine |
| JP2011038563A (en) * | 2009-08-07 | 2011-02-24 | Jtekt Corp | Inner ring and outer ring, and ball bearing |
| 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 |
Non-Patent Citations (1)
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| 方日杰: "《电机制造工艺学》", 31 May 1995, 机械工业出版社 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN108832754A (en) * | 2018-05-31 | 2018-11-16 | 深圳市中科智诚科技有限公司 | New energy automobile motor a kind of dust-proof and that output is stable |
| 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 |
| WO2022036990A1 (en) * | 2020-08-18 | 2022-02-24 | 广州市昊志机电股份有限公司 | Air bearing spindle and grinding machine tool |
| CN112467953A (en) * | 2020-09-24 | 2021-03-09 | 常州祥明智能动力股份有限公司 | Built-in drive integration permanent magnet brushless motor structure |
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| CN102522835B (en) | 2014-01-08 |
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Owner name: SHAANXI AEROSPACE NAVIGATION EQUIPMENT CO., LTD. Free format text: FORMER OWNER: BAOJI HUAKE AEROSPACE ELECTRO-MECHANICAL INDUSTRYL CO., LTD. Effective date: 20140715 |
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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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Effective date of registration: 20171221 Address after: 721006 Baoji hi tech Development Zone, new town, science and technology, Shaanxi Patentee after: Shaanxi aerospace navigation equipment Co., Ltd. Address before: 430056 hi tech park, Wuhan economic and Technological Development Zone, Hubei Patentee before: China Aerospace Times Electronics Co., Ltd. |
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