CN203326845U - Permanent-magnet synchronous motor for electric fork-lift trucks - Google Patents
Permanent-magnet synchronous motor for electric fork-lift trucks Download PDFInfo
- Publication number
- CN203326845U CN203326845U CN2013203597693U CN201320359769U CN203326845U CN 203326845 U CN203326845 U CN 203326845U CN 2013203597693 U CN2013203597693 U CN 2013203597693U CN 201320359769 U CN201320359769 U CN 201320359769U CN 203326845 U CN203326845 U CN 203326845U
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- stator
- synchronous motor
- magnet synchronous
- permanent magnet
- electri forklift
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Abstract
The utility model discloses a permanent-magnet synchronous motor for electric fork-lift trucks. The permanent-magnet synchronous motor comprises a stator and a rotor cooperating with each other, and a front end cover and a rear end cover which are clamped onto two ends of the stator in the axial direction. The stator comprises a stator core and a stator winding surrounding the stator core. A plurality of accommodating grooves are formed in the outer circumference of the stator core, wherein a fixed link for connecting all stator laminations in the stator core is soldered in each accommodating groove. A soldering point exists between the fixed link and each stator lamination. The accommodating grooves are arranged along the axial direction of the stator core. The permanent-magnet synchronous motor for electric fork-lift trucks of the utility model has advantages of simple structure, solidity, durability, good overload capacity and high power density and can be used to directly provide a high torque to drive the fork-lift trucks, the reduction gearbox in the prior art can be omitted, and the transmission efficiency is greatly improved.
Description
Technical field
The utility model relates to electric motors, is specifically related to the permanent magnet synchronous motor that a kind of electri forklift is used.
Background technology
In prior art, the type of drive of electri forklift mainly contains two kinds:
1) adopt DC motor acceleration and deceleration device to drive, while adopting this type of drive, due to the existence of commutator in DC motor and brush, limited the high-speed cruising of DC motor, simultaneously, DC motor itself exists failure rate high, the shortcoming of poor seismic behavior;
2) adopt asynchronous motor acceleration and deceleration device to drive, while adopting this type of drive, because asynchronous motor itself exists 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, the fork truck flying power is not strong.
Simultaneously, no matter be DC driven, or exchange driving, all the motor High Rotation Speed, then by driving decelerator to slow down and then increasing torque to drive the electri forklift wheel shaft to rotate, due to the existence of decelerator, make the transmission efficiency of electri forklift lower, also increased noise and failure rate.
Permanent magnet synchronous motor of the prior art comprises stator and the rotor cooperatively interacted, and by interacting 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, generally, stator is arranged with support outward, and the two side ends of support is along being respectively equipped with the seam matched with front end housing and rear end cap.
The disclosure of the invention that application publication number is CN 102916547A the high-efficiency energy-saving permanent magnet synchronous motor of the heavy formula electri forklift of a kind 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 the several piece magnet steel, the rotor core overcoat also is pressed into splined shaft, passes through the 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 the U of winding, V, W three-phase lead-out wire are 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 this invention in order to guarantee the tightness degree of stator core in permanent magnet synchronous motor, excircle at stator punching arranges the cramp groove, after stator punching is laminated, stator cramp is inserted in the cramp groove of stator punching, the cramp trench brace is tight, simultaneously, the two ends axial at stator core add stator end plate, and the termination of stator cramp bending is coated to stator end plate, then with the stator end plate welding, all stator punchings are crowded around between two relative stator end plates.
This scheme can prevent flicking of each stator punching, still, due to the existence of stator end plate, can increase the magnetic leakage factor of motor, affects the overall performance of motor.
The utility model content
The permanent magnet synchronous motor that the utility model provides a kind of electri forklift to use, simple in structure, sturdy and durable, overload capacity is strong, and power density is high, can directly realize the slow-speed of revolution, large torque actuated fork truck, save reduction box of the prior art, transmission efficiency is improved greatly.
The permanent magnet synchronous motor that a kind of electri forklift is used, comprise the stator and the rotor that cooperatively interact, and the front end housing and the rear end cap that fasten with the two ends of stator shaft orientation respectively, described stator comprises stator core and the stator winding on this stator core around the home, the excircle of described stator core is provided with some storage tanks, is welded with the fixed lever for all stator punchings of 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, make motor there is the characteristic of low-voltage and large electric current, after electric current passes into stator winding, the magnetic field interaction that the magnetic field that stator produces and rotor produce, make rotor with respect to stator rotation, thereby drive the operation of electri forklift.
Utilize fixed lever to fix each stator punching, fixed lever plays the effect of cramp of the prior art and stator end plate simultaneously, has simplified the structure of stator core, simultaneously, overcome the leakage field phenomenon that the existence due to stator end plate produces, improved the performance of motor.
With fixed lever, replace cramp can increase the bonding strength between each stator punching, preferably, between described fixed lever and each stator punching all with pad.To guarantee the stability be connected between fixed lever and all stator punchings, and then guarantee the steadiness of stator core integral body.
Fixed lever can adopt round steel equal strength and the higher material of toughness, avoids flicking of the stator punching that causes due to insufficient strength.
As preferably, described storage tank is axial arranged along stator core.
Storage tank extends axially along stator core, and on all stator punching excircles, same position is offered groove, has alleviated on the one hand the weight of stator punching, also facilitates on the other hand mutually aligning of groove between different stator punchings.
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, has save motor bed-plate of the prior art, and the position of stator, with after front end housing and rear end cap engage mutually, has been determined in the fixed lever two ends, and structure is compacter, and sturdy and durable.
In order to guarantee the fastness connected between all stator punchings, preferably, described fixed lever is 3～12, along the circumferential of stator punching, is uniformly distributed.
As preferably, the cross section of described fixed lever is circular.
The fixed lever of circular cross-section, when matching with storage tank, specifically engages angle without consideration, the carrying out that is easy to manufacture 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 weld mutually with fixed lever respectively on the both sides of storage tank V-type, makes fixed lever be difficult for rocking.
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, guarantee the integrally-built steadiness of permanent magnet synchronous motor.
The permanent magnet synchronous motor that the utility model electri forklift is used has the following advantages compared to existing technology:
(1) there do not is reversing arrangement, utilize fixed lever to fix all stator punchings, at the two ends of fixed lever, offer respectively the seam matched with front end housing and rear end cap, omit support of the prior art, simple in structure, sturdy and durable;
(2) due to stator winding adopt many copper cash and around, adopt high performance magnet steel in rotor, therefore overload capacity is strong, there is high efficiency, high power density, not only efficiency and power factor are high during nominal load, and have higher efficiency and power factor can guarantee to hang down load the time;
(3) by the orderly distribution of rotor yoke surface magnetic steel, large torque actuated fork truck can directly be provided, do not increase torque thereby do not need reduction box to be slowed down, make whole drive system reduce by a link, transmission efficiency improves greatly, reduce energy loss and noise, improved the utilance of storage battery in the electri forklift, strengthened the flying power of fork truck;
(4) adopt fixed lever to replace stator cramp, stator end plate and support simultaneously, the performance of having avoided the magnetic leakage factor that causes because of stator end plate to become the permanent magnet synchronous motor caused greatly worsens, reduced the manufacturing cost of permanent magnet synchronous motor simultaneously, guaranteed the tightness degree of stator core, and make the structure of permanent magnet synchronous motor and electri forklift compacter, reduce the probability that fault occurs, be conducive to layout and the design development of each parts of electri forklift;
(5) having reduced reduction box is the corresponding gear drive that reduced, and makes the responding ability directly driven be much higher than the mechanical speed change driving; Reduce the volume of electri forklift, can adapt to the operation in food and the narrow and small places such as medicine refrigeration house passage or chemicals warehouse.
The accompanying drawing explanation
The schematic diagram (broken section) that Fig. 1 is the permanent magnet synchronous motor used of the utility model electri forklift;
The schematic diagram that Fig. 2 is stator punching in the permanent magnet synchronous motor used of the utility model electri forklift;
The schematic diagram that Fig. 3 is stator core in the permanent magnet synchronous motor used of the utility model electri forklift;
The end view that Fig. 4 is Fig. 3 (broken section);
The schematic diagram that Fig. 5 is the permanent magnet synchronous motor rotor used of the utility model electri forklift.
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 that the utility model electri forklift is used is described in detail.
As shown in Figure 1, the permanent magnet synchronous motor that a kind of electri forklift is used, comprise the stator and the rotor that cooperatively interact, and the front end housing 20 and the rear end cap 21 that fasten with the two ends of stator shaft orientation respectively, stator comprises stator core 6 and the stator winding on this stator core 6 around the home, the excircle of stator core 6 is provided with some storage tanks 1, is welded with the fixed lever 3 for connecting stator iron core 6 all stator punchings 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 the beeline to stator core 6 outer circumference surfaces by the minimum point of V-type groove) is 2/3 of fixed lever 3 diameters.
Fixed lever 3 adopts the round steel of Φ 10, and fixed lever 3 is 6, along the circumferential of stator punching, is uniformly distributed, and between fixed lever 3 and each stator punching, all with pad 4, prevents flicking of stator punching.
In order to guarantee the intensity of stator core 6, can be according to the size of actual stator punching corresponding increase or reduce quantity and the specification of 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, at the two ends of round steel respectively turning process two seams 5, this seam 5 is coordinated with front end housing 20 and the rear end cap 21 of permanent magnet synchronous motor, between front end housing 20 and rear end cap 21, be equipped with pull bar 16, in order to keep the integrally-built steadiness of motor.
As shown in Figure 3, stator core 6 has some stator slots 2, and winding adopts 20 copper cash and, around 8 circles, the 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 that directly drives motor.
As shown in Figure 5, magnet steel fixed cover 9 inwalls of the rotor magnet steel 7 of evenly arranging, in the present embodiment, magnet steel 7 numbers are 20, respectively 10 of the magnet steel 7 of N polarity and S polarity, N, S alternately places, magnet steel fixed cover 9 prevents that magnet steel 7 from coming off because of the centrifugal force that rotation produces, be provided with rotor yoke 8 in magnet steel fixed cover 9, be provided with the keyway 10 cooperatively interacted between the splined shaft 11 of rotor yoke 8 and motor, realize the transmission of torque by being inlaid in flat key 12 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 matches with the bearing chamber of front end housing 20 and rear end cap 21 by bearing, has determined 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, guarantees that the air gap between stator and rotor is even.
As shown in Figure 1, the 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, realize the fixing of fluted disc 18 by the pressing plate 19 that is fixed on splined shaft 11 ends), fluted disc 18 synchronously rotates with splined shaft 11, be provided with can these fluted disc 18 turn signals of perception velocity transducer 15, after the signal that velocity transducer 15 rotates the fluted disc 18 of sensing, this signal is passed to the controller of electri forklift, the controller of electri forklift is according to the rotating speed of the calculated signals motor of velocity transducer 15 and the position of rotor, thereby control the operation of electri forklift.
Imbed in advance in stator winding and be useful on the thermistor that sense temperature changes, thermistor change in resistance signal feeds back to the controller of electri forklift by temperature sensor joint 14, the controller of electri forklift is according to the temperature of the change in resistance information calculating motor of thermistor, and control the operation of motor according to this temperature, prevent that motor from burning out because of overheated.
Stator winding is drawn U, V, the W three-phase power line is connected on U, V, W three-phase binding post 13, the U of the controller of electri forklift, V, W three-phase power line also are connected on U, V, W three-phase binding post 13, after starting the controller of electri forklift, motor passes into the three-phase low-voltage alternating current, produce rotating magnetic field in stator core 6, magnet steel 7 in this rotating magnetic field and rotor produces and interacts, and makes the motor rotation, drives the electri forklift operation.
When the permanent magnet synchronous motor that the utility model electri forklift is used is assembled, after being laminated, each stator punching connected by fixed lever 3, and by seam 5 realizations at fixed lever 3 two ends and coordinating of front end housing 20 and rear end cap 21, make the compact conformation of motor, during use, realize the rotation of rotor by the magnetic field induction between rotor and stator, and then drive the operation of electri forklift.
Claims (8)
1. the permanent magnet synchronous motor that electri forklift is used, comprise the stator and the rotor that cooperatively interact, and the front end housing and the rear end cap that fasten with the two ends of stator shaft orientation respectively, described stator comprises stator core and the stator winding on this stator core around the home, it is characterized in that, the excircle of described stator core is provided with some storage tanks, is welded with the fixed lever for all stator punchings of connecting stator iron core in each storage tank.
2. the permanent magnet synchronous motor that electri forklift as claimed in claim 1 is used, is characterized in that, between described fixed lever and each stator punching all with pad.
3. the permanent magnet synchronous motor that electri forklift as claimed in claim 1 is used, is characterized in that, described storage tank is axial arranged along stator core.
4. the permanent magnet synchronous motor that electri forklift as claimed in claim 1 is used, is characterized in that, the two ends of described fixed lever are respectively equipped with the seam matched with front end housing and rear end cap.
5. the permanent magnet synchronous motor that electri forklift as claimed in claim 1 is used, is characterized in that, described fixed lever is 3～12, along the circumferential of stator punching, is uniformly distributed.
6. the permanent magnet synchronous motor that electri forklift as claimed in claim 1 is used, is characterized in that, the cross section of described fixed lever is circular.
7. the permanent magnet synchronous motor that electri forklift as claimed in claim 6 is used, is characterized in that, described storage tank is V-type, and the degree of depth of described storage tank is 1/2～2/3 of fixed lever diameter.
8. the permanent magnet synchronous motor that electri forklift as claimed in claim 4 is used, is characterized in that, between described front end housing and rear end cap, is equipped with pull bar.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203597693U CN203326845U (en) | 2013-06-19 | 2013-06-19 | Permanent-magnet synchronous motor for electric fork-lift trucks |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203597693U CN203326845U (en) | 2013-06-19 | 2013-06-19 | Permanent-magnet synchronous motor for electric fork-lift trucks |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203326845U true CN203326845U (en) | 2013-12-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013203597693U Expired - Lifetime CN203326845U (en) | 2013-06-19 | 2013-06-19 | Permanent-magnet synchronous motor for electric fork-lift trucks |
Country Status (1)
| Country | Link |
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| CN (1) | CN203326845U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103390982A (en) * | 2013-06-19 | 2013-11-13 | 浙江西子富沃德电机有限公司 | Permanent-magnet synchronous motor for electric forklift |
-
2013
- 2013-06-19 CN CN2013203597693U patent/CN203326845U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103390982A (en) * | 2013-06-19 | 2013-11-13 | 浙江西子富沃德电机有限公司 | Permanent-magnet synchronous motor for electric forklift |
| CN103390982B (en) * | 2013-06-19 | 2015-10-21 | 浙江西子富沃德电机有限公司 | A kind of permanent magnet synchronous motor of electri forklift |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20131204 |