CN211209448U

CN211209448U - Permanent magnet synchronous motor

Info

Publication number: CN211209448U
Application number: CN201922278843.9U
Authority: CN
Inventors: 葛正军
Original assignee: Hengshui Zebra Automobile R & D Co ltd
Current assignee: Hengshui Zebra Automobile R & D Co ltd
Priority date: 2019-12-17
Filing date: 2019-12-17
Publication date: 2020-08-07
Anticipated expiration: 2029-12-17

Abstract

The utility model discloses a permanent magnet synchronous motor, including pivot, end cover, base and hou gai, the base both ends can be dismantled respectively and be connected with end cover and hou gai, the pivot is pegged graft inside the base, and the transmission output of pivot salient in the end cover, inside winding stator, permanent magnet and the rotor core of installing respectively of base, permanent magnet and rotor core are located inside the winding stator, the utility model discloses from motor lightweight, release high efficiency, motor stability, good heat dissipation starts big moment of torsion, can spontaneous electric energy under no external force energy condition, has guaranteed certain energy recovery to increase effectual continuation of the journey mileage. On the basis of the traditional motor, one battery pack is reduced to achieve the same continuous mileage, the cost of the whole vehicle is reduced after the motor is matched with the controller, and the performance of the whole vehicle is improved.

Description

Permanent magnet synchronous motor

Technical Field

The utility model relates to a truck, car driving motor technical field specifically are a permanent magnet synchronous motor.

Background

The new energy automobile adopts unconventional automobile fuel as a power source (or adopts conventional automobile fuel and a novel vehicle-mounted power device), integrates advanced technologies in the aspects of power control and driving of the automobile, and forms an automobile with advanced technical principle, new technology and new structure.

The driving motor and how to increase the continuous mileage in the field of new energy automobiles are the eternal topics of various circles in the industry, on one hand, a plurality of companies deeply research the reduction of the weight of an automobile body or the whole automobile, namely the light weight of the automobile body, on the other hand, on the aspect of being a motive source, the capacity of the battery is increased through the number of battery blocks, the battery density is improved, and the continuous mileage of the whole automobile is realized through a battery control system (BMS) system.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a permanent magnet synchronous motor, with solve among the above-mentioned background art current new energy automobile field driving motor and how to increase the continuation of the journey mileage be the forever topic in every boundary in the industry, many companies are from lightening automobile body or whole car weight on the one hand, automobile body lightweight deep research promptly, on the other hand is in the aspect of the driving source, increase battery capacity through the battery block number, improve battery density and battery control system (BMS) system and realize the whole car continuation of the journey mileage, the motor is great certainly, release inefficiency, motor stability is poor, poor heat dissipation, start the little moment of torsion, can not be from the problem of generating capacity under no external force energy condition.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a permanent magnet synchronous motor, includes pivot, end cover, base and hou gai, the base both ends can be dismantled respectively and be connected with end cover and hou gai, the pivot is pegged graft inside the base, and the transmission output of pivot salient in the end cover, inside winding stator, permanent magnet and the rotor core of installing respectively of base, permanent magnet and rotor core are located inside the winding stator, from motor lightweight, release high efficiency, and motor stability, good heat dissipation starts big moment of torsion, can spontaneous electric energy under no external force energy condition, have guaranteed certain energy recuperation to increase effectual continuation of the journey mileage. On the basis of the traditional motor, one battery pack is reduced to achieve the same continuous mileage, the cost of the whole vehicle is reduced after the motor is matched with the controller, and the performance of the whole vehicle is improved.

Preferably, the end cover is detachably connected with the base through a first fastener, a second fastener and a third fastener respectively, and the end cover and the base are convenient to mount and dismount through the first fastener, the second fastener and the third fastener.

Preferably, a rotary shaft lip-shaped sealing ring is installed at the joint of the rotary shaft and the end cover, and the waterproof and dustproof performance of the joint of the rotary shaft and the end cover is improved through the rotary shaft lip-shaped sealing ring.

Preferably, an end cover inner wall is installed a wave form circle and bearing respectively, a wave form circle is located bearing one side, a wave form circle and bearing are run through respectively to the pivot, have improved the leakproofness of end cover with the pivot junction through a wave form circle, and the bearing is convenient for support, direction and spacing to the pivot, improves pivot output pivoted stationarity.

Preferably, the rear cover is detachably connected with the base through a first fastener, a second fastener and a third fastener respectively, and the base and the rear cover are installed and detached through the first fastener, the second fastener and the third fastener.

Preferably, the rear cover right side wall can be dismantled and be connected with the magnetism and compile, the magnetism is compiled and can be dismantled through a fastening standard component, No. two fastening standard components and No. three fastening standard components respectively and be connected with the rear cover, has realized the installation and the dismantlement of base and rear cover through a fastener, No. two fasteners and No. three fasteners.

Preferably, the plug end of the rotating shaft is plugged in the rear cover, a second corrugated ring is filled at the joint of the rotating shaft and the rear cover, and the sealing property of the connection between the plug end of the rotating shaft and the rear cover is improved through the second corrugated ring.

Preferably, the connecting part of the rotating shaft and the rear cover is filled with a check ring, the sealing performance and the stability of the connection of the rotating shaft and the rear cover are effectively improved through the check ring, the dustproof and waterproof performance is good, and the service life is prolonged.

The utility model provides a permanent magnet synchronous motor possesses following beneficial effect:

(1) the utility model discloses embedded permanent magnet rotor, safe and reliable separates the magnetism good, and centralized winding iron core, short slot pitch, save material, manufacturing process nature is convenient, and power factor is high, efficient, power saving, small, starting moment big etc. begin to replace the most commonly used alternating current asynchronous machine step by step in many occasions, wherein asynchronous starting permanent magnet synchronous motor's superior performance.

(2) The nominal power of the motor is 4kw, the rated rotating speed is 3000r/min, the rotating speed of the motor is actually measured to be higher, and the rotating speed of the motor is increased by adopting a weak magnetic control mode when the motor is at a low speed by the aid of the controller. Therefore, the rotating speed of the motor reaches 4800r/min at the moment of 10Nm, the power is also improved to 5kW, the rotating speed and the power are both far higher than the rated rotating speed and the rated power, and the efficiency is 83 percent.

(3) When the torque is lower than 8Nm, the motor enters a speed-limiting operation mode, mainly to avoid the runaway when the motor is on level roads, especially when the motor is on a downhill slope, and the current, the input power, the output power and the efficiency all have the tendency of accelerating the decline. But only the transition process when the motor is started and stopped.

(4) The motor exhibits a maximum efficiency of 94% at 25Nm, with motor power reaching 7.69 kW. Within the range of 15-40 Nm of torque, the efficiency can reach 90% and above, when the torque reaches 40Nm, the maximum power output of the motor is 9.07kW, and the efficiency still reaches 90%.

(5) The motor enters a constant input power working state from a 40Nm starting point and working, and enters a reverse weak magnetic (strong magnetic) state from a control mode angle, namely, a rotating magnetic field of a three-phase winding of the motor stator is not vertical to a rotor magnetic field any more, but a magnetic field component with the same direction as the stator magnetic field can be generated to strengthen the rotor magnetic field, so that the motor can obtain larger torque, the climbing capacity of the electric vehicle is improved, the rotating speed of the motor is accelerated to be reduced, the output power is accelerated to be reduced, and the motor can be prevented from being burnt out due to overload.

Drawings

Fig. 1 is a schematic view of the overall structure of a permanent magnet synchronous motor according to the present invention;

fig. 2 is a schematic view of a sectional structure of a rotor core of a permanent magnet synchronous motor according to the present invention;

fig. 3 is a schematic view of a cross-sectional structure of a winding stator of a permanent magnet synchronous motor according to the present invention;

fig. 4 is a schematic structural diagram of a control system of a permanent magnet synchronous motor according to the present invention.

In the figure: 1. a rotating shaft; 2. a rotary shaft lip-shaped sealing ring; 3. an end cap; 4. a first wave ring; 401. a second wave-shaped ring; 5. a bearing; 6. a fastener number one; 7. a fastener number two; 8. a fastener number three; 9. a base; 10. a winding stator; 11. a permanent magnet; 12. a rotor core; 13. a front end plate; 14. a retainer ring; 15. a rear cover; 16. a fastening standard part I; 17. fastening a standard part II; 18. fastening standard parts III; 19. and (6) magnetic encoding.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

As shown in fig. 1-4, the utility model provides a technical solution:

example 1

The utility model provides a permanent magnet synchronous motor, includes pivot 1, end cover 3, base 9 and

back lid

15, 9 both ends of base can be dismantled respectively and be connected with end cover 3 and back lid 15, pivot 1 is pegged graft inside base 9, and the transmission output of pivot 1 salient in end cover 3, base 9 is inside to be installed winding stator 10, permanent magnet 11 and rotor core 12 respectively, permanent magnet 11 and rotor core 12 are located winding stator 10 insidely.

The end cover 3 is detachably connected with the base 9 through a first fastener 6, a second fastener 7 and a third fastener 8 respectively, and the end cover 3 and the base 9 are convenient to mount and dismount through the first fastener 6, the second fastener 7 and the third fastener 8.

A rotary shaft lip-shaped sealing ring 2 is installed at the joint of the rotary shaft 1 and the end cover 3, and the waterproof and dustproof performance of the joint of the rotary shaft 1 and the end cover 3 is improved through the rotary shaft lip-shaped sealing ring 2.

A wave form circle 4 and bearing 5 are installed respectively to 3 inner walls of end cover, a wave form circle 4 is located bearing 5 one side, a wave form circle 4 and bearing 5 are run through respectively to pivot 1, have improved the leakproofness of end cover 3 with the pivot 1 junction through a wave form circle 4, and bearing 5 is convenient for support, direction and spacing to pivot 1, improves pivot 1 output pivoted stationarity.

The rear cover 15 is detachably connected with the base 9 through a first fastener 6, a second fastener 7 and a third fastener 8 respectively, and the base 9 and the rear cover 15 are installed and detached through the first fastener 6, the second fastener 7 and the third fastener 8.

The magnetic braid 19 is detachably connected to the right side wall of the rear cover 15, the magnetic braid 19 is detachably connected with the rear cover 15 through a first fastening standard part 16, a second fastening standard part 17 and a third fastening standard part 18 respectively, and the stability of connection of the magnetic braid 19 and the right side wall of the rear cover 15 is improved through the first fastening standard part 16, the second fastening standard part 17 and the third fastening standard part 18.

The plug end of the rotating shaft 1 is plugged in the rear cover 15, a second corrugated ring 401 is filled at the joint of the rotating shaft 1 and the rear cover 15, and the sealing performance of the plug end of the rotating shaft 1 and the rear cover 15 is improved through the second corrugated ring 401.

The pivot 1 is filled with retaining ring 14 with back lid 15 junction, through retaining ring 14 effectual leakproofness and the stability of being connected of pivot 1 with back lid 15 improved, dustproof waterproof performance is good, increase of service life.

Example 2

The utility model provides a permanent magnet synchronous motor, includes pivot 1, end cover 3, base 9 and back

lid

It should be noted that, in the operation of a permanent magnet synchronous motor, the start and operation of the permanent magnet synchronous motor are formed by the interaction of the magnetic fields generated by the stator winding, the rotor cage winding and the permanent magnet. When the motor is static, three-phase symmetrical current is introduced into the stator winding to generate a stator rotating magnetic field, the stator rotating magnetic field generates current in the cage winding relative to the rotation of the rotor to form a rotor rotating magnetic field, and the asynchronous torque generated by the interaction of the stator rotating magnetic field and the rotor rotating magnetic field enables the rotor to rotate from the static state to the accelerated state. In the process, the rotating speeds of the rotor permanent magnetic field and the stator rotating magnetic field are different, and alternating torque is generated. When the rotor is accelerated to a speed close to the synchronous speed, the rotating speeds of the rotor permanent magnetic field and the stator rotating magnetic field are close to the same, the speed of the stator rotating magnetic field is slightly larger than that of the rotor permanent magnetic field, and the rotor and the stator rotating magnetic field interact to generate torque to pull the rotor into a synchronous running state. In the synchronous operating state, no current is generated in the rotor winding. At this time, only the permanent magnet on the rotor generates a magnetic field, which interacts with the stator rotating magnetic field to generate a driving torque. Therefore, the permanent magnet synchronous motor is started by the asynchronous torque of the rotor winding. After the starting is finished, the rotor winding does not work any more, and the magnetic field generated by the permanent magnet and the stator winding interacts to generate driving torque; the electric automobile controller comprises a central controller, a voltage type three-phase inverter and a speed sensor, wherein the central controller comprises an FOC module for operating a closed-loop vector control algorithm based on the rotating speed of an asynchronous motor fed back by the speed sensor, an SVC module for operating a non-speed-sensor vector control algorithm based on the estimated rotating speed obtained by estimating the rotating speed of the asynchronous motor, a selector connected with the FOC module and the SVC module and used for outputting and selecting, and an SVPWM module connected with the selector and used for generating a driving signal according to an output signal of the selector; the FOC module is interconnected with the SVC module, the FOC module learns inertia parameters of a transmission system of the electric automobile by self and provides the inertia parameters to the SVC module, and the SVC module corrects parameters of the asynchronous motor according to a preset model and provides the parameters to the FOC module. The target torque generation module is used for generating target torque constantly, and a gear shifting device, an accelerator pedal, a brake pedal and a speed measuring device of the electric automobile are connected, so that information of a gear shifting state of the electric automobile, a feedback quantity of the accelerator pedal, switch information of the brake pedal and the rotating speed of the alternating current motor is transmitted to the target torque generation module. The target torque generation module is also connected with a temperature monitoring device for detecting the temperature of the alternating current motor, so that the temperature of the alternating current motor is also sent to the target torque generation module. The system is also connected with a battery of the electric automobile, and the voltage of the battery is converted into the state of charge of the battery through the SOC estimation module and is also sent to the target torque generation module. The FOC control module is used for controlling the alternating current motor according to the target torque generated by the target torque generation module.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A permanent magnet synchronous motor is characterized in that: including pivot (1), end cover (3), base (9) and back lid (15), base (9) both ends can be dismantled respectively and be connected with end cover (3) and back lid (15), pivot (1) are pegged graft inside base (9), and the transmission output of pivot (1) salient in end cover (3), base (9) are inside to be installed winding stator (10), permanent magnet (11) and rotor core (12) respectively, permanent magnet (11) and rotor core (12) are located inside winding stator (10).

2. A permanent magnet synchronous machine according to claim 1, characterized in that: the end cover (3) is detachably connected with the base (9) through a first fastener (6), a second fastener (7) and a third fastener (8).

3. A permanent magnet synchronous machine according to claim 1, characterized in that: and a rotary shaft lip-shaped sealing ring (2) is arranged at the joint of the rotary shaft (1) and the end cover (3).

4. A permanent magnet synchronous machine according to claim 1, characterized in that: a wave form circle (4) and bearing (5) are installed respectively to end cover (3) inner wall, a wave form circle (4) is located bearing (5) one side, a wave form circle (4) and bearing (5) are run through respectively in pivot (1).

5. A permanent magnet synchronous machine according to claim 1, characterized in that: the rear cover (15) is detachably connected with the base (9) through a first fastener (6), a second fastener (7) and a third fastener (8).

6. A permanent magnet synchronous machine according to claim 1, characterized in that: the rear cover (15) right side wall can be dismantled and be connected with magnetism and compile (19), magnetism is compiled (19) and is dismantled with rear cover (15) through a fastening standard (16), No. two fastening standard (17) and No. three fastening standard (18) respectively and be connected.

7. A permanent magnet synchronous machine according to claim 1, characterized in that: the plug-in end of the rotating shaft (1) is plugged in the rear cover (15), and a second corrugated ring (401) is filled at the joint of the rotating shaft (1) and the rear cover (15).

8. A permanent magnet synchronous machine according to claim 1, characterized in that: and a check ring (14) is filled at the joint of the rotating shaft (1) and the rear cover (15).