CN202906710U - Permanent-magnet synchronous motor used in electric fork-lift truck - Google Patents
Permanent-magnet synchronous motor used in electric fork-lift truck Download PDFInfo
- Publication number
- CN202906710U CN202906710U CN2012205458525U CN201220545852U CN202906710U CN 202906710 U CN202906710 U CN 202906710U CN 2012205458525 U CN2012205458525 U CN 2012205458525U CN 201220545852 U CN201220545852 U CN 201220545852U CN 202906710 U CN202906710 U CN 202906710U
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- permanent magnet
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- Forklifts And Lifting Vehicles (AREA)
Abstract
The utility model relates to a permanent-magnet synchronous motor used in an electric fork-lift truck, comprising a front end cover, a spline shaft, a flat key, magnetic steels, a rotor iron core, a stator iron core, a U, V and W three-phase power supply wiring terminal, a speed sensor connector, a back end cover, a speed sensor and a winding. A plurality of magnetic steels are embedded in the rotor iron core, the rotor iron core is externally sleeved and pressed in the spline shaft, and a torque is transmitted between the rotor iron core and the spline shaft via the flat key; the front and back ends of the spline shaft are in rotation cooperation with the front end cover and the back end cover respectively, the stator iron core is sleeved on the rotor iron core externally, and a gap exists between the stator iron core and the rotor iron core; the winding is embedded in a stator groove of the stator iron core, and the U, V and W three-phase leading-out wires of the winding are connected with the U, V and W three-phase power supply wiring terminal; the front and back ends of the stator iron core are abutted by the front end cover and the back end cover respectively, the speed sensor is fixed at the end part of the spline shaft and is rotated along with the spline shaft, and a signal generated by the speed sensor is transmitted to an external controller via the speed sensor connector.
Description
Technical field
The utility model belongs to electri forklift with drive motor manufacturing technology field, relates in particular to the high-efficiency energy-saving permanent magnet synchronous motor that a kind of driven equilibrium weighs the formula electri forklift.
Background technology
The electri forklift main drive is DC motor at present, but less, the complex structure of DC motor specific power, the mechanical commutation device that itself exists causes its failure rate high, difficult in maintenance, and has greatly increased after cost.Along with the development of power electronic technology, the speed adjusting performance of alternating current machine improves gradually, can compare favourably with the dc motor speed regulating performance.In the last few years, the drive unit of electri forklift just was transitioned into alternating current motor by DC motor, and domestic each fork truck producer has all used AC asynchronous motor as new drive unit, and occupancy volume is rising year by year.Although, AC asynchronous motor does not need mechanical commutator, sturdy and durable, but the efficient of asynchronous motor and power factor are not high, the power supply utilization rate of electrical is not high yet, underloaded operating mode particularly, and efficient and the power factor of asynchronous motor are lower, cause electri forklift power utilization rate low, fork truck needs frequent charge, affects operating efficiency.
The utility model content
The utility model provides a kind of electri forklift permanent magnet synchronous motor, compare with asynchronous motor, it does not need idle exciting current, can significantly improve power factor, can reach 1, reduce stator current and stator resistance loss, and when stable operation, not have the rotor resistance loss, reduced the total losses of motor, thereby made its efficient higher 2~8 percentage points than same specification asynchronous motor.In addition, permanent magnet synchronous motor all can keep higher efficient and power factor in 25%-120% nominal load scope, and energy-saving effect is more remarkable when making light running.
The technical scheme that its technical problem that solves the utility model adopts is: the electri forklift permanent magnet synchronous motor, 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 the rotor core, leaves the 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, the 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.
Described electri forklift permanent magnet synchronous motor, the outer cup cover bracket of velocity transducer, carriage is fixed on the rear end cap.
Described electri forklift permanent magnet synchronous motor, the velocity transducer connector is fixed on the rear end cap.
Described electri forklift permanent magnet synchronous motor, the front and back end of splined shaft are rotatably assorted by bearing and front end housing, rear end cap respectively.
Described electri forklift permanent magnet synchronous motor, the oil sealing of packing between front end housing and the splined shaft.
Described electri forklift permanent magnet synchronous motor, the top of rear end cap is fixedly connected with lifting bolt.
Described electri forklift permanent magnet synchronous motor, rotor core is laminated and is formed by the multi-disc rotor punching, and rotor core forms eight slots, and eight slots are divided into four groups, and four group slots are along the circumferential direction uniform, are protuberance towards the ∧ in center of circle shape with group slot; Take the axle center of rotor core as benchmark, on the same group the N utmost point of two magnet steel, the S utmost point respectively in the same way, the N utmost point of adjacent sets magnet steel, the S utmost point are respectively oppositely.
Described electri forklift permanent magnet synchronous motor, stator core are laminated by the multi-disc stator punching and form.
Described electri forklift permanent magnet synchronous motor, stator core has 48 stator slots, be labeled as respectively in order 1-48, the U phase winding is by following structure coiling: have eight winding coils, embed respectively 3 and 13,4 and 14,15 and 25,16 and 26,27 and 37,28 and 38,39 and 1,40 and 2 stator slot, connected by connecting line (L) between winding coil; The composition of V, W phase, connection and arrangement form are mutually identical with U, and eight winding coils of V phase embed respectively in 11 and 21,12 and 22,23 and 33,24 and 34,35 and 45,36 and 46,47 and 9,48 and 10 the stator slot; Eight winding coils of W phase embed respectively in 7 and 17,8 and 18,19 and 29,20 and 30,31 and 41,32 and 42,43 and 5,44 and 6 the stator slot.
Described electri forklift permanent magnet synchronous motor is imbedded thermistor in the winding, signal is delivered to outer controller by the thermoswitch connector, and the thermoswitch connector is fixed on the rear end cap.
In the utility model structure, rotor punching laminates the formation rotor core, alternately places N utmost point magnet steel and S utmost point magnet steel in the magnet steel groove of rotor core, and rotating shaft is penetrated rotor core connects to form permanent magnet synchronous motor by flat key rotor assembly; Consisted of the stator module of motor by winding, stator core; The sensor cluster that has been formed motor by velocity transducer connector, carriage and velocity transducer.Rotor assembly, stator module and sensor cluster are by having constituted permanent magnet synchronous motor with bearing, front end housing, rear end cap, bearing cap.Wherein, adopt winding combination of the present utility model and arrangement mode, keep under the condition of output equal-wattage when making the motor operation operation, motor is worked below safe voltage 36V, has the ability of holding larger electric current.Moreover the utility model motor does not have casing, has dwindled volume, has reduced cost, has more effectively solved the problem of motor heat dissipation.
The utility model makes that electri forklift drive unit volume is little, overload capacity is strong, has strengthened the climbing capacity of vehicle, and its efficient and power factor are high, takes full advantage of the electric energy of battery feed, has improved the flying power of electri forklift.
Description of drawings
Fig. 1 is structural representation of the present utility model.
Among Fig. 1: 1. front end housing, 2. bearing, 3. splined shaft, 4. oil sealing, 5. flat key, 6. magnet steel, 7. rotor core, 8. stator core, 9. thermoswitch connector, 10.U, V, W three phase mains binding post, 11. the velocity transducer connector, 12. lifting bolts, 13. rear end caps, 14. carriage, 15. velocity transducers, 16. screws, 17. winding, 18. bolts, 19. nuts.
Fig. 2 is the schematic cross-section of rotor core.
Among Fig. 2: 7, rotor core, 6, magnet steel
Fig. 3 is the punching figure of stator core.
Among Fig. 3: 8-1, stator slot, 8-2, cramp groove
Fig. 4 is the expansion schematic diagram of U phase winding.
Among Fig. 4: 48 stator slots of 1-48 numeral stator punching; Hexagon shown in the a-b-c-d-e-f represents a winding coil; L is connecting line between coil, and U is that electric current flows into end, and X is the outflow of bus current end.
Embodiment
Below in conjunction with drawings and Examples the utility model is further specified.
Referring to Fig. 1, the present embodiment electri forklift comprises front end housing 1 with permanent magnet synchronous motor, bearing 2, splined shaft 3, oil sealing 4, flat key 5, magnet steel 6, rotor core 7, stator core 8, thermoswitch connector 9, U, V, W three phase mains binding post 10, velocity transducer connector 11, lifting bolt 12, rear end cap 13, carriage 14, velocity transducer 15, screw 16, winding 17, bolt 18, nut 19, rotor core 7 is laminated and is formed by the multi-disc rotor punching, rotor core 7 forms endoporus and eight slots, form the flat key groove on the inner hole wall, eight slots are divided into four groups, four group slots are along the circumferential direction uniform, are protuberance towards the ∧ in center of circle shape with group slot.In eight slots of magnet steel 6 according to N utmost point magnet steel shown in Figure 2 and the staggered insertion rotor core 7 of S utmost point magnet steel, then rotor core 7 is pressed into splined shaft 3, by flat key 5 carry-over moments, magnet steel 6, rotor core 7, splined shaft 3, flat key 5 consist of the rotor assembly of motor between the two.The front and back end of the splined shaft 3 of motor rotor assembly is rotatably assorted by bearing 2 and front end housing 1, rear end cap 13 respectively, has controlled the locus of rotor assembly in motor interior.The oil sealing 4 of also packing between front end housing 1 and the splined shaft 3.Stator core 8 forms endoporus, stator slot 8-1, cramp groove 8-2, and stator core 8 is coated at outside the rotor core 7, leaves the gap between the two.Winding 17 embeds in the stator slot of stator core 8, consists of the stator module of motor.Conflicted by front end housing 1, rear end cap 13 respectively in the front and back end of the stator core 8 of stator module, constant to guarantee the air gap value between itself and the rotor assembly.Velocity transducer 15 is fixed on the end of splined shaft 3 and rotates thereupon, its outer cup cover bracket 14, carriage 14 is fixed on the rear end cap 13 by screw 16, the signal Negotiation speed sensor connector 11 that velocity transducer 15 produces is delivered to fork truck controller, and velocity transducer connector 11 is fixed on the rear end cap 13.The top of rear end cap 13 also is fixedly connected with lifting bolt 12.Stay bolt 18 penetrates from the outside of rear end cap 13, and after screwing in front end housing 1, the end outside the rear end cap 13 screws nut 19.
Figure 2 shows that the sectional view of rotor core, rotor core 7 is overrided to form by the multi-disc rotor punching, after the rotor iron core laminated moulding, be embedded in magnet steel 6 at its magnet steel slot, and the N of magnet steel, S polarity are placed as shown in Figure 2, rotor core is pressed into the rotating shaft relevant position, and realizes the moment transmission by flat key, consists of the rotor assembly of motor.
Figure 3 shows that the punching figure of stator core, the multi-disc stator punching laminates and forms stator core 8, be embedded in winding 17 at stator slot 8-1, consist of the band winding stator core of motor, the U of winding, V, W three-phase lead-out wire are connected on U, V, the W three phase mains binding post 10; Imbed thermistor in winding 17, in order to detect in real time the temperature of winding, and coherent signal is delivered to fork truck controller by thermoswitch connector 9, thermoswitch connector 9 is fixed on the rear end cap 13.
Figure 4 shows that the expansion schematic diagram of U phase in motor three phase windings, that is: the stator core inner circle is launched tiling, 48 stator slots of 1-48 numeral stator punching; Hexagon shown in the a-b-c-d-e-f represents a winding coil, hexagonal ab, de limit embed respectively in stator core 8 grooves of corresponding numeral, each winding coil is to be formed by equivalent wire coiling 7 circles, connected by connecting line L between coil, and equivalent wire is comprised of 9 fine copper wires, and the ability that so equivalent wire holds electric current is exactly 9 times of every fine copper wire; U is that electric current flows into end, and X is the outflow of bus current end, and electric current is flowed into by the U end and is divided into four the tunnel, four the tunnel merge into the outflow of route X end behind the process winding, the parallel branch number that is motor is 4, total current is four times of every branch road in the winding, has further improved the ability that motor holds electric current.The V of motor, the composition of W, connection are mutually identical with U with arrangement form, and the V phase winding embeds in the stator slot 9,10,11,12,21,22,23,24,33,34,35,36,45,46,47,48, and the W phase winding embeds in remaining stator slot.U, V, W three phase windings consist of the three-phase symmetric winding of motor.
The utility model motor, its winding 17 embeds in the groove of stator core 8 by above-mentioned coiling and distribution mode, just can make motor that the ability of holding large electric current is arranged.Different from industrial permanent magnet motor, common 10kW permanent magnet motor rated current can be 22A, and the utility model motor rated current is 230A, the instantaneous 500A of holding electric current can not burn out motor, and power output reaches 10kW, make like this operating mode operation of motor below safe voltage 36V, and the output that can keep same levels power, be applicable to the battery-driven applying working condition of electri forklift.
The utility model not only overcomes the problems such as existing DC motor volume is large, noise is high, reversing arrangement is fragile and cause motor poor reliability and after-sales service difficulty, and inherited the advantage of AC asynchronous motor, namely little, simple in structure without support, volume, do not need mechanical commutator, failure rate is low, sturdy and durable, can run up, have simultaneously higher power density and energy density, make the motor volume less; Have higher efficient and power factor, improved fork truck power utilization rate and flying power.
The utility model high-efficiency energy-saving permanent magnet synchronous motor has compact conformation, without support, volume is less, radiating condition is good, overload capacity is strong, efficient and power factor is high, energy-efficient, improve the advantages such as utilance of fork truck storage battery electric energy.
Claims (10)
1. electri forklift permanent magnet synchronous motor, it is characterized in that: 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 the rotor core, leaves the 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, the 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.
2. electri forklift permanent magnet synchronous motor as claimed in claim 1, it is characterized in that: the outer cup cover bracket of velocity transducer, carriage is fixed on the rear end cap.
3. electri forklift permanent magnet synchronous motor as claimed in claim 1 or 2, it is characterized in that: the velocity transducer connector is fixed on the rear end cap.
4. electri forklift permanent magnet synchronous motor as claimed in claim 1, it is characterized in that: the front and back end of splined shaft is rotatably assorted by bearing and front end housing, rear end cap respectively.
5. such as claim 1 or 4 described electri forklift permanent magnet synchronous motors, it is characterized in that: the oil sealing of packing between front end housing and the splined shaft.
6. such as claim 1 or 2 or 4 described electri forklift permanent magnet synchronous motors, it is characterized in that: the top of rear end cap is fixedly connected with lifting bolt.
7. electri forklift permanent magnet synchronous motor as claimed in claim 1, it is characterized in that: rotor core is laminated and is formed by the multi-disc rotor punching, and rotor core forms eight slots, and eight slots are divided into four groups, four group slots are along the circumferential direction uniform, are protuberance towards the ∧ in center of circle shape with group slot; Take the axle center of rotor core as benchmark, on the same group the N utmost point of two magnet steel, the S utmost point respectively in the same way, the N utmost point of adjacent sets magnet steel, the S utmost point are respectively oppositely.
8. electri forklift permanent magnet synchronous motor as claimed in claim 1, it is characterized in that: stator core is laminated by the multi-disc stator punching and forms.
9. electri forklift permanent magnet synchronous motor as claimed in claim 8, it is characterized in that: described stator core has 48 stator slots, be labeled as respectively in order 1-48, the U phase winding is by following structure coiling: have eight winding coils, embed respectively 3 and 13,4 and 14,15 and 25,16 and 26,27 and 37,28 and 38,39 and 1,40 and 2 stator slot, connected by connecting line (L) between winding coil;
The composition of V, W phase, connection and arrangement form are mutually identical with U, and eight winding coils of V phase embed respectively in 11 and 21,12 and 22,23 and 33,24 and 34,35 and 45,36 and 46,47 and 9,48 and 10 the stator slot; Eight winding coils of W phase embed respectively in 7 and 17,8 and 18,19 and 29,20 and 30,31 and 41,32 and 42,43 and 5,44 and 6 the stator slot.
10. such as claim 1 or 2 or 8 or 9 described electri forklift permanent magnet synchronous motors, it is characterized in that: imbed thermistor in the winding, signal is delivered to outer controller by the thermoswitch connector, and the thermoswitch connector is fixed on the rear end cap.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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CN2012205458525U CN202906710U (en) | 2012-10-23 | 2012-10-23 | Permanent-magnet synchronous motor used in electric fork-lift truck |
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CN2012205458525U CN202906710U (en) | 2012-10-23 | 2012-10-23 | Permanent-magnet synchronous motor used in electric fork-lift truck |
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CN2012205458525U Expired - Lifetime CN202906710U (en) | 2012-10-23 | 2012-10-23 | Permanent-magnet synchronous motor used in electric fork-lift truck |
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Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102916547A (en) * | 2012-10-23 | 2013-02-06 | 浙江西子富沃德电机有限公司 | Permanent magnet synchronous motor for electric forklift |
CN104113154A (en) * | 2014-06-03 | 2014-10-22 | 华中科技大学 | Embedded PMSM for turning-type electric main shaft |
CN108233608A (en) * | 2018-03-22 | 2018-06-29 | 宁德时代电机科技有限公司 | A kind of permanent-magnet motor apparatus for integrating lossless automatic braking |
CN110535293A (en) * | 2018-05-24 | 2019-12-03 | 江苏伯海电驱动科技有限公司 | A kind of permanent magnet synchronous motor with buffer-type revolving speed intelligent speed-control structure |
-
2012
- 2012-10-23 CN CN2012205458525U patent/CN202906710U/en not_active Expired - Lifetime
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102916547A (en) * | 2012-10-23 | 2013-02-06 | 浙江西子富沃德电机有限公司 | Permanent magnet synchronous motor for electric forklift |
CN102916547B (en) * | 2012-10-23 | 2015-06-10 | 浙江西子富沃德电机有限公司 | Permanent magnet synchronous motor for electric forklift |
CN104113154A (en) * | 2014-06-03 | 2014-10-22 | 华中科技大学 | Embedded PMSM for turning-type electric main shaft |
CN108233608A (en) * | 2018-03-22 | 2018-06-29 | 宁德时代电机科技有限公司 | A kind of permanent-magnet motor apparatus for integrating lossless automatic braking |
CN108233608B (en) * | 2018-03-22 | 2023-09-15 | 宁德时代电机科技有限公司 | Permanent magnet motor device integrating lossless automatic braking |
CN110535293A (en) * | 2018-05-24 | 2019-12-03 | 江苏伯海电驱动科技有限公司 | A kind of permanent magnet synchronous motor with buffer-type revolving speed intelligent speed-control structure |
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GR01 | Patent grant | ||
CX01 | Expiry of patent term |
Granted publication date: 20130424 |
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CX01 | Expiry of patent term |