CN103390982B - A kind of permanent magnet synchronous motor of electri forklift - Google Patents
A kind of permanent magnet synchronous motor of electri forklift Download PDFInfo
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- CN103390982B CN103390982B CN201310249721.1A CN201310249721A CN103390982B CN 103390982 B CN103390982 B CN 103390982B CN 201310249721 A CN201310249721 A CN 201310249721A CN 103390982 B CN103390982 B CN 103390982B
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Abstract
The invention discloses a kind of permanent magnet synchronous motor of electri forklift, comprise the stators and rotators cooperatively interacted, and the front end housing fastened with the two ends of stator shaft orientation respectively and rear end cap, described stator comprises stator core and the stator winding around the home on this stator core, the excircle of described stator core is provided with some storage tanks, is welded with the fixed lever for stator punchings all in connecting stator iron core in each storage tank.All with pad between described fixed lever and each stator punching.Axial arranged along stator core of described storage tank.The permanent magnet synchronous motor of electri forklift of the present invention, structure is simple, sturdy and durable, and overload capacity is strong, and power density is high, directly can provide large torque actuated fork truck, eliminate reduction box of the prior art, transmission efficiency is improved greatly.
Description
Technical field
The present invention relates to electric motors, be specifically related to a kind of permanent magnet synchronous motor of electri forklift.
Background technology
In prior art, the type of drive of electri forklift mainly contains two kinds:
1) DC motor acceleration and deceleration device is adopted to drive, when adopting this type of drive, due to the existence of commutator in DC motor and brush, limit the high-speed cruising of DC motor, meanwhile, it is high to there is failure rate in DC motor itself, the shortcoming of poor seismic behavior;
2) asynchronous motor acceleration and deceleration device is adopted to drive, when adopting this type of drive, due to asynchronous motor itself, to there is overload capacity not high, the shortcoming that light-load efficiency is low, power factor is low, cause the storage battery utilance of electri forklift low, fork truck flying power is not strong.
Meanwhile, no matter be DC driven, or exchange driving, be all motor High Rotation Speed, then rotate, due to the existence of decelerator to drive electri forklift wheel shaft by driving decelerator to slow down and then increasing torque, make the transmission efficiency of electri forklift lower, too increase noise and failure rate.
Permanent magnet synchronous motor of the prior art comprises the stators and rotators cooperatively interacted, and by the mutual induction of stator field and rotor field, realizes the driving function of permanent magnet synchronous motor.Stator is usually by front end housing and rear end cap fixed position, and in order to realize coordinating of stator and front end housing and rear end cap, under normal circumstances, be arranged with support outside stator, the two side ends of support is along being respectively equipped with the seam matched with front end housing and rear end cap.
The high-efficiency energy-saving permanent magnet synchronous motor of application publication number to be the disclosure of the invention of the CN102916547A a kind of heavy formula electri forklift of driven equilibrium: comprise front end housing, splined shaft, flat key, magnet steel, rotor core, stator core, U, V, W three phase mains binding post, velocity transducer connector, rear end cap, velocity transducer, winding, rotor core embeds several piece magnet steel, rotor core overcoat is also pressed into splined shaft, by flat key carry-over moment between rotor core and splined shaft; The front and back end of splined shaft is rotatably assorted with front end housing, rear end cap respectively; Stator core is coated at outside rotor core, leaves gap between the two; Winding embeds in the stator slot of stator core, and U, V, W three-phase lead-out wire of winding is connected on U, V, W three phase mains binding post; Conflicted by front end housing, rear end cap respectively in the front and back end of stator core; Velocity transducer is fixed on the end of splined shaft and rotates thereupon, and the signal Negotiation speed sensor connector that velocity transducer produces is delivered to outer controller.
In order to ensure the tightness degree of stator core in permanent magnet synchronous motor in this invention, at the excircle of stator punching, cramp groove is set, after stator punching is laminated, stator cramp is inserted in the cramp groove of stator punching, cramp trench brace is tight, simultaneously, stator end plate is added at the two ends of stator core axis, and the termination of stator cramp is bent coated stator end plate, then weld with stator end plate, all stator punchings are crowded around between two relative stator end plates.
This scheme can prevent flicking of each stator punching, but, due to the existence of stator end plate, the magnetic leakage factor of motor can be increased, affect the overall performance of motor.
Summary of the invention
The invention provides a kind of permanent magnet synchronous motor of electri forklift, structure is simple, sturdy and durable, overload capacity is strong, and power density is high, directly can realize the slow-speed of revolution, large torque actuated fork truck, eliminate reduction box of the prior art, transmission efficiency is improved greatly.
A kind of permanent magnet synchronous motor of electri forklift, comprise the stators and rotators cooperatively interacted, and the front end housing fastened with the two ends of stator shaft orientation respectively and rear end cap, described stator comprises stator core and the stator winding around the home on this stator core, the excircle of described stator core is provided with some storage tanks, is welded with the fixed lever for stator punchings all in connecting stator iron core in each storage tank.
Stator winding adopt many copper cash and around, then according to certain distribution mode around the home on stator core, motor is made to have the characteristic of low-voltage and big current, after electric current passes into stator winding, the magnetic field that stator produces and the magnetic field interaction that rotor produces, make rotor relative to stator rotation, thus drive the operation of electri forklift.
Fixed lever is utilized to fix each stator punching, fixed lever plays the effect of cramp of the prior art and stator end plate simultaneously, simplifies the structure of stator core, simultaneously, overcome the leakage field phenomenon produced due to the existence of stator end plate, improve the performance of motor.
The bonding strength between each stator punching can be increased, preferably, all with pad between described fixed lever and each stator punching with fixed lever replacement cramp.To guarantee the stability be connected between fixed lever with all stator punchings, and then ensure the steadiness of stator core entirety.
Fixed lever can adopt round steel equal strength and the higher material of toughness, avoids flicking of the stator punching caused due to insufficient strength.
As preferably, axial arranged along stator core of described storage tank.
Storage tank extends along the axis of stator core, and namely on all stator punching excircles, same position offers groove, alleviates on the one hand the weight of stator punching, also facilitates mutually aligning of groove between different stator punching on the other hand.
As preferably, the two ends of described fixed lever are respectively equipped with the seam matched with front end housing and rear end cap.
The seam at fixed lever two ends matches with front end housing and rear end cap respectively, eliminates motor bed-plate of the prior art, and after fixed lever two ends engage mutually with front end housing and rear end cap, namely determine the position of stator, structure is compacter, and sturdy and durable.
In order to ensure the fastness connected between all stator punchings, preferably, described fixed lever is 3 ~ 12, is uniformly distributed along the circumferential of stator punching.
As preferably, the cross section of described fixed lever is circular.
The fixed lever of circular cross-section, when matching with storage tank, specifically engaging angle without the need to considering, being easy to the carrying out of manufacturing process, and the diameter of fixed lever is selected according to the stator punching of different size.
As preferably, described storage tank is V-type, and the degree of depth of described storage tank is 1/2 ~ 2/3 of fixed lever diameter.
The storage tank of V-type facilitates placement and the welding of fixed lever, and the both sides of storage tank V-type are welded mutually with fixed lever respectively, and fixed lever is not easily rocked.
As preferably, between described front end housing and rear end cap, be equipped with pull bar.
Pull bar between front end housing and rear end cap, ensures the integrally-built steadiness of permanent magnet synchronous motor.
The permanent magnet synchronous motor of electri forklift of the present invention has the following advantages compared to existing technology:
(1) there is not reversing arrangement, utilize fixed lever to fix all stator punchings, offer the seam matched with front end housing and rear end cap respectively, omit support of the prior art at the two ends of fixed lever, structure is simple, sturdy and durable;
(2) due to stator winding adopts many copper cash and around, high performance magnet steel is adopted in rotor, therefore overload capacity is strong, there is the advantage of high efficiency, high power density, not only during nominal load efficiency and power factor high, and when can ensure lower load, there is higher efficiency and power factor;
(3) by the orderly distribution of rotor yoke surface magnetic steel, large torque actuated fork truck can be directly provided, reduction box is not needed to carry out slowing down thus increasing torque, whole drive system is made to decrease a link, transmission efficiency improves greatly, reduce energy loss and noise, improve the utilance of storage battery in electri forklift, enhance the flying power of fork truck;
(4) adopt fixed lever to instead of stator cramp, stator end plate and support simultaneously, avoid the penalty that the magnetic leakage factor caused because of stator end plate becomes the permanent magnet synchronous motor caused greatly, reduce the manufacturing cost of permanent magnet synchronous motor simultaneously, ensure that the tightness degree of stator core, and make the structure of permanent magnet synchronous motor and electri forklift compacter, decrease the probability that fault occurs, be conducive to layout and the design development of each parts of electri forklift;
(5) decrease reduction box and correspondingly decrease gear drive, making the responding ability of Direct driver be much higher than mechanical speed change and drive; Reduce the volume of electri forklift, the operation in food and the narrow and small place such as medicine refrigeration house passage or chemicals warehouse can be adapted to.
Accompanying drawing explanation
Fig. 1 is the schematic diagram (broken section) of the permanent magnet synchronous motor of electri forklift of the present invention;
Fig. 2 is the schematic diagram of stator punching in the permanent magnet synchronous motor of electri forklift of the present invention;
Fig. 3 is the schematic diagram of stator core in the permanent magnet synchronous motor of electri forklift of the present invention;
Fig. 4 is the end view (broken section) of Fig. 3;
Fig. 5 is the schematic diagram of the permanent magnet synchronous motor rotor of electri forklift of the present invention.
In figure: 1, storage tank; 2, stator slot; 3, fixed lever; 4, pad; 5, seam; 6, stator core; 7, magnet steel; 8, rotor yoke; 9, magnet steel fixed cover; 10, keyway; 11, splined shaft; 12, flat key; 13, U, V, W three-phase binding post; 14, temperature sensor joint; 15, velocity transducer; 16, pull bar; 17, nut; 18, fluted disc; 19, pressing plate; 20, front end housing; 21, rear end cap.
Embodiment
Below in conjunction with accompanying drawing, the permanent magnet synchronous motor of electri forklift of the present invention is described in detail.
As shown in Figure 1, a kind of permanent magnet synchronous motor of electri forklift, comprise the stators and rotators cooperatively interacted, and the front end housing 20 fastened with the two ends of stator shaft orientation respectively and rear end cap 21, stator comprises stator core 6 and the stator winding around the home on this stator core 6, the excircle of stator core 6 is provided with some storage tanks 1, is welded with the fixed lever 3 for stator punchings all in connecting stator iron core 6 in each storage tank 1.
Each stator punching as shown in Figure 2, some stator punchings mutually laminate and form stator core 6 as shown in Figure 3, storage tank 1 on stator core 6 is V-type, storage tank 1 is axial arranged along stator core 6, and the degree of depth of storage tank 1 (degree of depth of storage tank 1 is to the beeline of stator core 6 outer circumference surface by the minimum point of V-type groove) is 2/3 of fixed lever 3 diameter.
Fixed lever 3 adopts the round steel of Φ 10, and fixed lever 3 is 6, is uniformly distributed along the circumferential of stator punching, all with pad 4 between fixed lever 3 and each stator punching, prevents flicking of stator punching.
In order to ensure the intensity of stator core 6, can according to the corresponding increase of the size of the stator punching of reality or the quantity and the specification that reduce round steel.
As shown in Figure 4, after round steel and each stator punching weld, the two ends of round steel slightly exceed the axial length of stator core 6, the two ends of round steel are respectively equipped with the seam 5 matched with front end housing 20 and rear end cap 21, namely at the two ends of round steel, turnery processing goes out two seams 5 respectively, the front end housing 20 of this seam 5 and permanent magnet synchronous motor and rear end cap 21 are coordinated, is equipped with pull bar 16 between front end housing 20 and rear end cap 21, in order to keep the integrally-built steadiness of motor.
Pull bar 16 is the screwed studs in two ends, front end housing 20 has the screwed hole matched with the screw thread of stud, rear end cap 21 has the unthreaded hole matched with stud, during assembling, by stud successively through rear end cap 21 and front end housing 20, one end and front end housing 20 threaded engagement of stud are locked, and after the other end of stud stretches out rear end cap 21, coordinate lock with nut 17.
As shown in Figure 3, stator core 6 has some stator slots 2, and winding adopts 20 copper cash and around 8 circles, parallel branch number is 2, and coil span is 2, according to double-layer overlapped around mode embed in stator slot 2; Stator core 6, round steel and stator winding form the stator directly driving motor.
As shown in Figure 5, magnet steel fixed cover 9 inwall of rotor is evenly arranged magnet steel 7, in the present embodiment, magnet steel 7 number is 20, each 10 of the magnet steel 7 of N polarity and S polarity, N, S alternately places, magnet steel fixed cover 9 prevents magnet steel 7 from coming off because rotating the centrifugal force of generation, rotor yoke 8 is provided with in magnet steel fixed cover 9, the keyway 10 cooperatively interacted is provided with between the splined shaft 11 of rotor yoke 8 and motor, the transmission of torque is realized by the flat key 12 be inlaid in keyway 10, splined shaft 11, flat key 12, rotor yoke 8, magnet steel 7 and magnet steel fixed cover 9 form the rotor of permanent magnet synchronous motor.
Rotor is matched by the bearing chamber of bearing with front end housing 20 and rear end cap 21, determines the locus of front end housing 20 and rear end cap 21, and front end housing 20 and rear end cap 21 match with the seam 5 on round steel, ensures that the air gap between stators and rotators is even.
As shown in Figure 1, one end that on splined shaft 11, fixed cover is provided with fluted disc 18(splined shaft 11 is provided with ring-shaped step, fluted disc 18 is set on ring-shaped step, the fixing of fluted disc 18 is realized) by the pressing plate 19 being fixed on splined shaft 11 end, fluted disc 18 is with splined shaft 11 synchronous axial system, being provided with can the velocity transducer 15 of this fluted disc 18 turn signal of perception, after the signal that the fluted disc 18 sensed rotates by velocity transducer 15, by this signal transmission to the controller of electri forklift, the rotating speed of calculated signals motor of the controller foundation velocity transducer 15 of electri forklift and the position of rotor, thus control the operation of electri forklift.
The thermistor for sense temperature change is imbedded in advance in stator winding, thermistor change in resistance signal feeds back to the controller of electri forklift by temperature sensor joint 14, the temperature of the change in resistance information calculating motor of the controller foundation thermistor of electri forklift, and the operation of motor is controlled according to this temperature, prevent motor from burning out because of overheated.
Stator winding is drawn U, V, W three-phase power line and is connected on U, V, W three-phase binding post 13, U, V, W three-phase power line of the controller of electri forklift is also connected on U, V, W three-phase binding post 13, after starting the controller of electri forklift, motor passes into three-phase low-voltage alternating current, rotating magnetic field is produced in stator core 6, magnet steel 7 in this rotating magnetic field and rotor produces and interacts, and motor is rotated, and drives electri forklift to run.
When the permanent magnet synchronous motor of electri forklift of the present invention is assembled, connected by fixed lever 3 after each stator punching is laminated, and realized and the coordinating of front end housing 20 and rear end cap 21 by the seam 5 at fixed lever 3 two ends, make the compact conformation of motor, during use, realized the rotation of rotor by the magnetic field induction between rotor and stator, and then drive the operation of electri forklift.
Claims (6)
1. the permanent magnet synchronous motor of an electri forklift, comprise the stators and rotators cooperatively interacted, and the front end housing fastened with the two ends of stator shaft orientation respectively and rear end cap, described stator comprises stator core and the stator winding around the home on this stator core, it is characterized in that, the excircle of described stator core is provided with some storage tanks, is welded with the fixed lever for stator punchings all in connecting stator iron core in each storage tank; The two ends of described fixed lever are respectively equipped with the seam matched with front end housing and rear end cap; The cross section of described fixed lever is circular; Described storage tank is V-type.
2. the permanent magnet synchronous motor of electri forklift as claimed in claim 1, is characterized in that, all with pad between described fixed lever and each stator punching.
3. the permanent magnet synchronous motor of electri forklift as claimed in claim 1, is characterized in that, axial arranged along stator core of described storage tank.
4. the permanent magnet synchronous motor of electri forklift as claimed in claim 1, it is characterized in that, described fixed lever is 3 ~ 12, is uniformly distributed along the circumferential of stator punching.
5. the permanent magnet synchronous motor of electri forklift as claimed in claim 1, it is characterized in that, the degree of depth of described storage tank is 1/2 ~ 2/3 of fixed lever diameter.
6. the permanent magnet synchronous motor of electri forklift as claimed in claim 1, is characterized in that, be equipped with pull bar between described front end housing and rear end cap.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310249721.1A CN103390982B (en) | 2013-06-19 | 2013-06-19 | A kind of permanent magnet synchronous motor of electri forklift |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310249721.1A CN103390982B (en) | 2013-06-19 | 2013-06-19 | A kind of permanent magnet synchronous motor of electri forklift |
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| Publication Number | Publication Date |
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| CN103390982A CN103390982A (en) | 2013-11-13 |
| CN103390982B true CN103390982B (en) | 2015-10-21 |
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| CN201310249721.1A Active CN103390982B (en) | 2013-06-19 | 2013-06-19 | A kind of permanent magnet synchronous motor of electri forklift |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106169840B (en) * | 2016-08-31 | 2018-08-31 | 北京航空航天大学 | It is a kind of by motor and controller collection at integrated electric motor drive system |
| CN109038960A (en) * | 2018-09-03 | 2018-12-18 | 中车永济电机有限公司 | A kind of highly integrated generator suitable for locomotive |
| CN115912697A (en) * | 2023-01-09 | 2023-04-04 | 恒业智能驱动(杭州)股份有限公司 | Iron core with insulating end plate |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87210553U (en) * | 1987-09-11 | 1988-04-06 | 大连市调节器厂 | Moment motor of continuous rotation block |
| CN2845297Y (en) * | 2005-08-23 | 2006-12-06 | 浙江中源电气有限公司 | Small permanent magnetic sychronous motor |
| CN202121390U (en) * | 2011-07-08 | 2012-01-18 | 江阴博风特种电机有限公司 | Sea-wave power generator |
| CN203326845U (en) * | 2013-06-19 | 2013-12-04 | 浙江西子富沃德电机有限公司 | Permanent-magnet synchronous motor for electric fork-lift trucks |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3885732B2 (en) * | 2003-01-07 | 2007-02-28 | 日産自動車株式会社 | Permanent magnet embedded synchronous motor |
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2013
- 2013-06-19 CN CN201310249721.1A patent/CN103390982B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87210553U (en) * | 1987-09-11 | 1988-04-06 | 大连市调节器厂 | Moment motor of continuous rotation block |
| CN2845297Y (en) * | 2005-08-23 | 2006-12-06 | 浙江中源电气有限公司 | Small permanent magnetic sychronous motor |
| CN202121390U (en) * | 2011-07-08 | 2012-01-18 | 江阴博风特种电机有限公司 | Sea-wave power generator |
| CN203326845U (en) * | 2013-06-19 | 2013-12-04 | 浙江西子富沃德电机有限公司 | Permanent-magnet synchronous motor for electric fork-lift trucks |
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| CN103390982A (en) | 2013-11-13 |
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