CN206878667U - A kind of five mutually fault-tolerant direct current generators of 270V high power densities - Google Patents
A kind of five mutually fault-tolerant direct current generators of 270V high power densities Download PDFInfo
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- CN206878667U CN206878667U CN201720382281.0U CN201720382281U CN206878667U CN 206878667 U CN206878667 U CN 206878667U CN 201720382281 U CN201720382281 U CN 201720382281U CN 206878667 U CN206878667 U CN 206878667U
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- rotor
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- high power
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Abstract
The utility model discloses a kind of five mutually fault-tolerant direct current generators of 270V high power densities.Rotor and rotating shaft are fixedly and coaxially connected; rotor outer surface is provided with permanent magnet and is cased with protective case; stator is provided with dovetail groove; winding is wound between adjacent trapezoidal groove; housing outer surface is provided with the logical oil groove of double thread; housing external application gear oil jacket encapsulation, fluid flowing in logical oil groove cause motor to be cooled down in a manner of the logical oil of housing；Permanent magnet is placed in rotor surface with rotor surface-mount type structure, including along the circumferentially-spaced six row permanent magnetic strips uniformly arranged of rotating shaft, it is circumferentially spaced on stator to be provided with ten dovetail grooves in uniform way, ten dovetail grooves coiling winding between the adjacent dovetail groove of each two forms five phase windings, and housing end face surrounding edge uniformly installs five Hall sensors.The 270V of the utility model design DC intelligent motor, has the advantages of high redundancy, high power density, excellent dynamic property, low torque ripple and low noise.
Description
Technical field
A kind of brshless DC motor is the utility model is related to, it is compatible more particularly to the five of a kind of 270V high power densities
Wrong direct current generator.
Background technology
It is born with the priority of F-35, B787 aircraft, how electric aircraft is electricity consumption compared to conventional airplane, substantial change
Force system part instead of secondary power system.B787 is using changing amplifying unit by 230V AC conversions into 270V direct currents
Source, powered for electric-motor pump even load；F-22 and F-35 aircrafts then directly employ 270V DC power-supply systems.Power-supply system voltage
Horizontal raising reduces current amplitude, so as to reduce cable cross-sections product and loss.DC power-supply system is intersecting compared to three
Electric power system is flowed, cable number can be caused to reduce, reduce further cable weight.
Selection and control of the change of power-supply system to electric-motor pump motor have a great impact again, between phase and phase
Electricity, machinery, magnetic and heat have good insulating properties；Have high torque/weight than with high torque/electric current ratio；Phase inductance is high (right
For magneto)；High efficiency in the full range of speeds.
Electricity, machinery, magnetic and heat insulation between phase and phase, make motor have higher reliability, in the process of running, no
Easily there is phenomena such as short-circuit, and motor is possessed higher fault-tolerance, not interfering with other after a certain short circuit mutually works；High
Torque/mass ratio is substantially motor is had high power density, and high torque/electric current is than meaning the sensitive of motor
Degree is very high, and acceleration and deceleration are fast, and required control signal is small；The high-efficiency operation of the full range of speeds, make the energy on aircraft can be with
It is fully utilized as far as possible.
It is final to determine to make using permanent-magnet brushless DC electric machine according to how electric aircraft to aircraft power system proposed requirement
For the motor of electric-motor pump.Permanent-magnet brushless DC electric machine control is compared to permagnetic synchronous motor compared to relatively simple, it is not necessary to high
The sensor of precision and complicated controller, improve reliability, higher power density causes it in addition to a certain extent
It is more suitable for electric-motor pump motor.
Utility model content
In view of how electric the development of aircraft be swift and violent at present, according to how electric aircraft to aircraft power system proposed requirement with forever
Motor of the magnetic brshless DC motor as electric-motor pump, the utility model proposes the five of a kind of 270V high power densities are compatible
Wrong direct current generator, can be used for ± 270V how electric the aircraft power systems of DC, and with high redundancy, high power density, low turn
Square is pulsed and low noise and other advantages.
The technical solution of the utility model is as follows：
The utility model include gear oil jacket, housing and rotor in housing, stator, rotating shaft, permanent magnet, protective case and
Winding, rotor and rotating shaft are fixedly and coaxially connected, and rotor is located at nexine, and for stator sleeve outside rotor, rotor outer surface is provided with permanent magnetism
Body is simultaneously cased with protective case, and protective case prevents that permanent magnet shakes off rotor when motor from rotating at a high speed.Permanent magnet is fixed on by protective case
Rotor outer surface；Dovetail groove is provided with stator, winding is wound between adjacent trapezoidal groove, stator, rotor and rotating shaft are together by shell
In body is encapsulated in；The housing outer surface is provided with the logical oil groove of double thread, housing external application gear oil jacket encapsulation, housing and gear oil jacket it
Between be provided with fluid, fluid flowing in logical oil groove causes motor to be cooled down in a manner of the logical oil of housing.
Electric machine controller is arranged on motor shaft tail, is encapsulated in together with motor in logical oilcan body.
Described permanent magnet is placed in rotor surface with rotor surface-mount type structure, makes the air gap magnetic between stator and rotor
Flux density is on the trapezoidal distribution of motor electrical angle.
The permanent magnet includes axial along rotating shaft along the circumferentially-spaced six row permanent magnetic strips uniformly arranged of rotating shaft, each column permanent magnetic strip
Rotor outer surface is attached to, six row permanent magnetic strips form three pairs of magnetic poles；It is circumferentially spaced on the stator to be provided with ten ladders in uniform way
Shape groove, ten dovetail grooves coiling winding between the adjacent dovetail groove of each two form five phase windings, and each phase winding is respectively every tooth
Coiling it is wrapped on the groove tooth of dovetail groove；Circumferentially spaced uniformly five difference of installation of surrounding edge in the shell one end face
Hall sensor corresponding with five phase windings, radial direction of the Hall sensor positioned at each self-corresponding winding center.
Motor of the present utility model totally five phase winding, coiling respectively, it has good electricity, magnetic, heat absolutely between phase and phase
Edge, even and if certain mutually open circuit, normal torque can also be exported, there is higher redundancy.Also, the utility model motor is every
It is fraction extremely per phase slot number, copper factor can be improved and then improve electric efficiency, also helping reduces cogging torque and torque ripple
It is dynamic.
The utility model accurately detects the rotary state position in electric cycle residing for rotor using five Hall sensors, and will
Detection signal is transferred to peripheral control unit.
Each phase winding of the stator is respectively connected with H bridge power driving circuits, and H bridges power driving circuit is and external motor
Driver is connected, and external motor driver is controlled with a H bridge power driving circuit respectively to each phase, and winding is connected thereto
H bridge power driving circuits break down other phases will not be had influence on by mid-point voltage, ensure to realize electrolysis coupling between each phase.
Described rotating shaft one end is provided with the rotary transformer for gathering motor rotor position and rate signal.
The winding of the stator is provided with the integrated temperature probe for being used to detect stator winding temperature, integrated temperature probe patch
Winding is installed.
By the utility model specific calculation design after electric machine structure, enable motor in rated speed 10000rpm just
Reversion；By the design to drive control device, ± 270VDC power-supply systems can be coordinated to use；Selected in materials such as permanent magnets
Select, motor is operated in the environment of -55~135 DEG C.
The utility model is fraction because motor has 10 grooves, 6 magnetic poles and 5 phase windings, MgO-ZrO_2 brick, is constituted
Fractional-slot winding, fractional-slot winding can improve copper factor and then improve electric efficiency, and also helping reduces cogging torque and turn
Square fluctuates.
The 270VDC DC intelligent motors of the utility model design, have high redundancy, high power density, excellent dynamic
The advantages of performance, low torque ripple and low noise, the necks such as Aero-Space, robot and weapons equipment can be widely used in
Domain, its advantage are mainly reflected in the following aspects：
(1) the DC intelligent motor is designed based on 270V DC DC power systems, can be operated in -55~135 DEG C
Adverse circumstances under, there is high power density and high reliability；
(2) motor is cooled down using low-pressure hydraulic oil, and cooling effectiveness is high, can be big if be applied in combination with high-revolving pump
The big power density and efficiency for improving sub-assembly；
(3) machine winding is individual layer centralization stator winding, and fractional-slot is combined as plus motor slot number of poles, and the two is combined can
To improve copper factor and then improve electric efficiency, suppress phase fault, improve motor reliability, also help reduction cogging torque
And torque ripple；
(4) motor monitors rotor status by 5 Hall integrated circuits, and exhausted with 1 rotary transformer survey rotor
To position and the speed of service, make control of the driver to motor drive current more accurate；
(5) driver is respectively controlled with five groups of H bridges power driving circuits to five phase windings, it ensure that each phase of motor
Between electrolysis coupling, i.e., a certain phase open circuit fault will not be had influence on other phases by mid-point voltage, substantially increase motor operation
Reliability, redundancy.
Brief description of the drawings
Fig. 1 is the utility model primary structure figure；
Fig. 2 is Fig. 1 axial cross-sectional view；
Fig. 3 is the structure chart of housing.
Fig. 4 is the H bridge power driving circuit figures of five phases.
In figure：1st, rotor, 2, permanent magnet, 3, stator, 4, gear oil jacket, 5, housing, 6, protective case, 7, rotating shaft, 8, rotor gear
Plate, 9, winding, 10, Hall sensor, 11, logical oil groove.
Embodiment
1 to Fig. 4 and specific embodiment, the utility model is described in further detail below in conjunction with the accompanying drawings.
As shown in figure 1, the utility model specific implementation includes keeping off oil jacket 4, housing 5 and rotor 1 in housing 5, calmly
Son 3, rotating shaft 7, permanent magnet 2, protective case 6 and winding 9, rotor 1 and rotating shaft 7 are fixedly and coaxially connected, and rotor 1 is located at nexine, stator 3
It is sleeved on outside rotor 1, the outer surface of rotor 1 is provided with permanent magnet 2 and is cased with protective case 6, and permanent magnet 2 is fixed on by protective case 6 to be turned
Sub 1 outer surface；Dovetail groove is provided with stator 3, winding 9, stator 3, rotor 1, rotating shaft 7 and driving are wound between adjacent trapezoidal groove
Device is encapsulated in interior by housing 5 together；As shown in figure 3, the outer surface of housing 5 is provided with the logical oil groove 11 of double thread, the external application of housing 5 gear oil
The encapsulation of set 4, is provided with fluid between housing 5 and gear oil jacket 4, fluid flowing in logical oil groove 11 causes motor to lead to the side of oil with housing
Formula cools down.
Rotor stop plate 8 is connected to two end faces of protective case 6, when protective case 6 is used to prevent that motor from rotating at a high speed, permanent magnet
2 radial directions shake off rotor 1.Rotor stop plate 8 is used to carry out axial restraint to rotor 1, permanent magnet 2 and rotor protection set 6, prevents rotor
Component is axially shaken off.
As shown in Fig. 2 permanent magnet 2 is placed in the surface of rotor 2 with rotor surface-mount type structure, make between stator 1 and rotor 2
Air gap flux density on the trapezoidal distribution of motor electrical angle, including along the circumferentially-spaced six row permanent magnetism uniformly arranged of rotating shaft 7
Bar, for rotor surface-mount type structure from motor cross section, rotor surface posts 6 equally distributed radial direction tile shape permanent magnetic strips,
Every piece of permanent magnetic strip is axially attached to the outer surface of rotor 1 arrangement along rotating shaft 7, and interpolar is provided between adjacent permanent magnet bar every magnetic stripe to facilitate forever
Magnetic stripe is installed, and six row permanent magnetic strips form three pairs of magnetic poles.Permanent magnet uses radial magnetizing, at holding motor gas-gap magnetic flux density
Locate identical.
Circumferentially spaced on stator 3 to be provided with ten dovetail grooves in uniform way, ten dovetail grooves are in the adjacent dovetail groove of each two
Between coiling winding 9 form five phase windings, each phase winding 9 is wrapped on the groove tooth of dovetail groove every tooth coiling respectively, every tooth around
System forms individual layer centralization stator winding.
The circumferentially spaced uniform installation five of surrounding edge of the end face of housing 5 is corresponding with five phase windings 9 respectively
Hall sensor 10, radial direction of the Hall sensor 10 positioned at each self-corresponding center of winding 9.
Hall sensor is placed on five fixed positions of axle tail of machine shaft, according to five Hall sensor output signals
Combination is equipped with corresponding truth table, can detect which state S1~S10 that motor is in the electric cycle.
As shown in figure 4, each phase winding 9 of stator 3 is respectively connected with H bridge power driving circuits, H bridges power driving circuit with
External motor driver connects.
The one end of rotating shaft 7 is provided with the rotary transformer for gathering the position of rotor 1 and rate signal, can be used for examining
In measured motor running the real time position of rotor and per phase induced electromotive force whether zero crossing.
The winding 9 of stator 3 is provided with the integrated temperature probe for being used to detect the temperature of stator winding 9, integrated temperature probe patch
Winding 9 is installed, and is detected to electrical fault.
During motor processing and debugging, all component and its accessory are roughly equal to 20.6kg in Fig. 1, and rated speed is 10000rpm,
Nominal torque is 18Nm, i.e., rated power is 19kw, and power density is about 0.95kw/kg；During stable operation, motor teeth groove turns
Square ripple frequency is about 5000Hz, and rotating speed fundamental frequency is about 167Hz, and torque pulsation is about 30 times of rotating speed fundamental frequency, therefore torque arteries and veins
It is dynamic to be effectively filtered out；Motor starting time is 0.4s~0.6s.
Embodiment and its course of work of the present utility model are：
During motor operation, the state position in electric cycle residing for rotor 1 is accurately detected using five Hall sensors 10, and will
Detection signal is transferred to peripheral control unit, and the state position in controller electric cycle according to residing for rotor 1 is used the winding 9 of stator 3
Corresponding control voltage and control electric current control.
Each Machine cycle is divided into three identical electricity cycles, each corresponding 120 ° of mechanical angles of electric cycle, and be divided into
10 state S1~S10, the motor status number judged according to Hall integrated circuit, it is to be passed through per phase winding to control driver
Corresponding driving current, motor is set to export continuous torque.
Each Hall sensor 10 can export 1 and 0 two digital quantity according to the electromagnetic intensity of permanent magnet 2 detected.
The set of number amount exported jointly in synchronization according to five Hall sensors 10 (A, B, C, D, E), it can be determined that go out rotor 1
State in which number.Such as：When (A, B, C, D, E) output valve is (1,0,0,1,1), it can be determined that motor is in S1 states；When defeated
When to go out value be (1,0,0,0,1), motor is in S2 states, therefore 10 states can be according to the output of five Hall sensors 10
It is worth to identification.
Each state S1~S10 in electric cycle is specifically：Machine shaft 7 is turning over 0~120 ° completely from initial position
In electric periodic regime, with 0~12 ° be S1,12 °~24 ° be S2,24 °~36 ° be S3,36 °~48 ° be S4,48 °~60 ° be
S5,60 °~72 ° be S6,72 °~84 ° be S7,84 °~96 ° be S8,96 °~108 ° be S9,108 °~120 ° be S10.After
Each electric cycle carries out state encoding according to this rule.
Outside motor driver is arranged on motor afterbody, five groups of H bridge power drives of motor driver in specific implementation
Circuit is respectively controlled to five phase windings, it ensure that the electrolysis coupling between each phase of motor, i.e., a certain phase open circuit fault will not
The work of other phases is had influence on by mid-point voltage so that the utility model motor still can normal work.
Above-mentioned embodiment is used for illustrating the utility model, rather than the utility model is limited,
Spirit of the present utility model and any modifications and changes in scope of the claims, made to the utility model, all fall
Enter the scope of protection of the utility model.
Claims (6)
- A kind of 1. five mutually fault-tolerant direct current generators of 270V high power densities, it is characterised in that：Including gear oil jacket (4), housing (5) and Rotor (1), stator (3), rotating shaft (7), permanent magnet (2), protective case (6) and winding (9) in housing (5), rotor (1) and Rotating shaft (7) is fixedly and coaxially connected, and rotor (1) is located at nexine, and stator (3) is sleeved on rotor (1) outside, and rotor (1) outer surface is provided with Permanent magnet (2) is simultaneously cased with protective case (6), and permanent magnet (2) is fixed on rotor (1) outer surface by protective case (6)；On stator (3) Dovetail groove is provided with, winding (9) is wound between adjacent trapezoidal groove, stator (3), rotor (1) and rotating shaft (7) are encapsulated in housing (5) in；Housing (5) outer surface is provided with the logical oil groove (11) of double thread, housing (5) external application gear oil jacket (4) encapsulation, housing (5) fluid is provided between gear oil jacket (4), fluid flowing in logical oil groove (11) make it that motor is cold in a manner of the logical oil of housing But.
- A kind of 2. five mutually fault-tolerant direct current generators of 270V high power densities according to claim 1, it is characterised in that：It is described Permanent magnet (2) rotor (1) surface is placed in rotor surface-mount type structure, make the air gap magnetic between stator (3) and rotor (1) Flux density is on the trapezoidal distribution of motor electrical angle.
- A kind of 3. five mutually fault-tolerant direct current generators of 270V high power densities according to claim 1, it is characterised in that：It is described Permanent magnet (2) includes axially equal along rotating shaft (7) along the circumferentially-spaced six row permanent magnetic strips uniformly arranged of rotating shaft (7), every permanent magnetic strip Even to be attached to rotor (1) outer surface, six row permanent magnetic strips form three pairs of magnetic poles；It is circumferentially spaced on the stator (3) to open in uniform way There are ten dovetail grooves, ten dovetail grooves coiling winding (9) between the adjacent dovetail groove of each two forms five phase windings；The shell The surrounding edge of body (5) end face is circumferentially spaced uniformly to install five Hall sensors corresponding with five phase windings (9) respectively (10), radial direction of the Hall sensor (10) positioned at each self-corresponding winding (9) center.
- A kind of 4. five mutually fault-tolerant direct current generators of 270V high power densities according to claim 3, it is characterised in that：It is described Each phase winding (9) of stator (3) is respectively connected with H bridge power driving circuits, H bridges power driving circuit with external motor driver Connection.
- A kind of 5. five mutually fault-tolerant direct current generators of 270V high power densities according to claim 1, it is characterised in that：It is described Rotating shaft (7) one end be provided with for gathering the rotary transformer of rotor (1) position and rate signal.
- A kind of 6. five mutually fault-tolerant direct current generators of 270V high power densities according to claim 1, it is characterised in that：It is described The winding (9) of stator (3) is provided with the integrated temperature probe for being used to detect stator winding (9) temperature, and integrated temperature probe posts Group (9) is installed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720382281.0U CN206878667U (en) | 2017-04-12 | 2017-04-12 | A kind of five mutually fault-tolerant direct current generators of 270V high power densities |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720382281.0U CN206878667U (en) | 2017-04-12 | 2017-04-12 | A kind of five mutually fault-tolerant direct current generators of 270V high power densities |
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| Publication Number | Publication Date |
|---|---|
| CN206878667U true CN206878667U (en) | 2018-01-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720382281.0U Expired - Fee Related CN206878667U (en) | 2017-04-12 | 2017-04-12 | A kind of five mutually fault-tolerant direct current generators of 270V high power densities |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106992652A (en) * | 2017-04-12 | 2017-07-28 | 浙江大学 | Five mutually fault-tolerant direct current generators of 270V high power densities |
| CN113595267A (en) * | 2020-04-30 | 2021-11-02 | 华为技术有限公司 | Motor and equipment |
-
2017
- 2017-04-12 CN CN201720382281.0U patent/CN206878667U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106992652A (en) * | 2017-04-12 | 2017-07-28 | 浙江大学 | Five mutually fault-tolerant direct current generators of 270V high power densities |
| CN113595267A (en) * | 2020-04-30 | 2021-11-02 | 华为技术有限公司 | Motor and equipment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180112 |