CN208209844U - A kind of double winding three-phase motor - Google Patents
A kind of double winding three-phase motor Download PDFInfo
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- CN208209844U CN208209844U CN201820713791.6U CN201820713791U CN208209844U CN 208209844 U CN208209844 U CN 208209844U CN 201820713791 U CN201820713791 U CN 201820713791U CN 208209844 U CN208209844 U CN 208209844U
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Abstract
A kind of double winding three-phase motor, the motor include motor stator winding, and three-phase motor stator winding includes two groups, first group is driven at low speed winding, only cuts winding, the number of turns W1 by controller in low speed, three-phase windings are denoted as A, B and C, generally ABC winding respectively；Second group is high-speed driving winding, cuts winding, the number of turns W2 by controller in high speed and low speed, and three-phase windings are denoted as a, b and c, generally abc winding respectively；The number of winding turns of W1 is greater than W2；Phase difference is not present in ABC winding and the same phase control of abc winding, and ABC winding and the rear end neutral point of abc winding are connected directly；ABC winding front end is connected with the output end of the first inversion unit, and abc winding front end is connected with the output end of the second inversion unit；First inversion unit and the second inversion unit are connected in parallel on capacitor both ends, collectively constitute electric machine controller；The utility model both can produce the big torque of low speed, and wide-range-timing/high-speed cruising also may be implemented.
Description
Technical field
The utility model relates to three-phase motor technical fields, and in particular to a kind of double winding three-phase motor.
Technical background
For electric car, under different operating conditions, the performance requirement of driving motor system is different.
It when automobile accelerates since zero-speed/low speed, or is on slope when starting, at this time speed or electricity
Machine revolving speed is all relatively low, but needs big torque to overcome the component of frictional force or vehicle self gravity.Motor torque is close with magnetic flux
It spends directly proportional, it is therefore desirable to high magnetic flux density.
In high-performance cruise, system is not usually high to torque request, but in order to operate automobile drive electric motor higher efficiency,
Wish to reduce magnetic flux density.In high-speed region, iron loss accounting is high, and iron loss is substantially square directly proportional to magnetic flux density.Cause
This, magnetic flux density is lower, and iron loss is lower.In addition, being generated by the magnetic flux of permanent magnet anti-electronic if motor is magneto
Gesture (voltage) can also increase as revolving speed increases.And battery voltage level is limited on vehicle, when the counter electromotive force reaches inverter
When can be applied to the voltage of motor or more, electric current can not just pass through again in motor, and revolving speed cannot rise again.Therefore, in order to
Maximum speed is improved, reduces magnetic flux density also to inhibit counter electromotive force --- in this regard, being generated usually using weak magnetic control technology
Revolving speed is improved to reduce counter electromotive force with the magnetic flux of permanent magnet flux opposite direction.But in order to generate opposite direction
Magnetic flux, it is necessary to make current flow through stator winding, this equally will increase loss, also will increase permanent magnet demagnetization risk.Cause
The range of this weak magnetic is also unsuitable wide.
That is, being different in level of torque, the magnetic density that low-speed region and high-speed region require.
In the prior art, there is the scheme using bi-motor, solve the demand of high speed and low speed high torque, i.e., big small rated
The motor of power, which is arranged in pairs or groups, to be used, and two motors is linked together by universal driving shaft, control uses in different situations respectively
Different motors, this method use two motors, and complicated in mechanical structure, higher cost.
Realize the scheme of low speed high torque in technology also by polyphase machine at present, polyphase winding can be achieved by control
The advantages that torque pulsation is small, low current realizes big torque, but control is more complex, and cost is also higher.
Summary of the invention
The purpose of this utility model is that being directed to the deficiencies in the prior art, a kind of double winding three-phase motor is provided,
The utility model both can produce the big torque of low speed, and wide-range-timing/high-speed cruising also may be implemented.
In order to achieve the above object, the technical solution adopted in the utility model are as follows:
A kind of double winding three-phase motor, including motor stator winding 3, the three-phase motor stator winding 3 include two groups, the
One group is driven at low speed winding, only cuts winding, the number of turns W1 by controller in low speed, and three-phase windings are denoted as A, B respectively
And C, generally ABC winding；Second group is high-speed driving winding, cuts winding, the number of turns by controller in high speed and low speed
For W2, three-phase windings are denoted as a, b and c, generally abc winding respectively；The number of winding turns of W1 is greater than W2；ABC winding and abc winding
Phase difference is not present in same phase control, and ABC winding and the rear end neutral point of abc winding are connected directly；ABC winding front end and the
The output end of one inversion unit 1 is connected, and abc winding front end is connected with the output end of the second inversion unit 2；Described first is inverse
Become unit 1 and the second inversion unit 2 is connected in parallel on capacitor both ends；First inversion unit 1 and the second inversion unit 2 collectively constitute
Electric machine controller 4.
It further include switch S1, the switch S1 is arranged between the first inversion unit 1 and DC bus or is arranged first
Between inversion unit 1 and ABC winding, it is arranged between the first inversion unit 1 and DC bus, in the second inversion unit 2
Prevent coil-induced energy from flowing back into DC bus when work；The switch S1 is semiconductor switch or relay switch.
First inversion unit 1 is identical with the structure of the second inversion unit 2, is three phase inverter bridge.
The control method of the double winding three-phase motor, when motor operation is when low speed, the first inversion unit 1 and second
Inversion unit 2 works at the same time, and all windings are all worked at this time, generates more number of ampere turns, generates big torque, torque capacity
Up to T1；Switch S1 is kept open-minded at this time, is released energy and the bi-directional energy flow of motor power feedback with meeting energy-storage battery；
As revolving speed increases, into weak magnetic state；When motor speed reaches n3, stop 1 envelope wave of the first inversion unit
Work, the second inversion unit 2 keeps work, and disconnects switch S1, and motor enters single set winding operating mode at this time, only high
Speed driving winding work；Since turns-in-series are less, back-emf is relatively small, reduces the depth of weak magnetic；Switch S1, which is disconnected, to be protected
Card ABC winding, which is in, is fully disconnected mode, prevents from generating electric current formation interference magnetic field in ABC winding；
When motor is by high deceleration, when revolving speed is down to n2, make again the first inversion unit 1 start to work, be again introduced into around
Group series model.
It is describedWherein: N is the flux-weakening ratio of motor；Δ n be n2~
Width between n3；N1 is that the inflection point revolving speed of weak magnetic is needed under double winding series model, and Δ n=n1.
Compared to the prior art compared with the utility model has following advantage:
1, it due in low speed, switching at high speed operating mode, is equivalent to and is carried out between a high-speed motor, a slowspeed machine
Switching, therefore the effect of two grades of gearboxes is played, it both can produce the big torque of low speed, wide-range-timing/height also may be implemented
Speed operation.
2, due to " slowspeed machine " and low regime it is high-efficient, " high-speed motor " it is high-efficient in high velocity, high speed, it is low
Speed can realize efficient operation.
3, low speed coil and high speed coil are simultaneously operable in low speed, the power failure-free in high low speed handoff procedure.
4, two coils can work independently, and improve system reliability.
5, the turn ratio of double winding is calculated according to the speed adjustable range that system needs, therefore can made weak under each pattern
Magnetic degree is shallow as far as possible, is easier weak magnetic control.
Detailed description of the invention
Fig. 1 is the first sectional wind electric machine controller schematic diagram of the utility model.
Fig. 2 is second of sectional wind electric machine controller schematic diagram of the utility model.
Fig. 3 is the mechanical characteristic using motor after the utility model electric machine controller.
Fig. 4 is motor and control system general frame.
Specific embodiment
In order to keep the purpose of this utility model, technical solution and advantage more clear and concise, below in conjunction with attached drawing and implementation
Example, the present invention will be further described in detail.It should be appreciated that specific embodiment described herein is only used to explain
The utility model is not used to limit the utility model.
As depicted in figs. 1 and 2, a kind of double winding three-phase motor of the utility model, including motor stator winding 3, described three
Phase motor stator winding 3 includes two groups, and first group is driven at low speed winding, only cuts winding, circle by controller in low speed
Number is W1, and three-phase windings are denoted as A, B and C, generally ABC winding respectively；Second group is high-speed driving winding, in high speed and low speed
When winding cut by controller, the number of turns W2, three-phase windings are denoted as a, b and c, generally abc winding respectively；The winding of W1
It encloses number and is greater than W2；Phase difference, the rear end neutral point of ABC winding and abc winding is not present in ABC winding and the same phase control of abc winding
It is connected directly；ABC winding front end is connected with the output end of the first inversion unit 1, abc winding front end and the second inversion unit
2 output end is connected；First inversion unit 1 and the second inversion unit 2 are connected in parallel on capacitor both ends；The first inversion list
Member 1 and the second inversion unit 2 collectively constitute electric machine controller 4.
It further include switch S1, as shown in Figure 1, the switch S1 is arranged between the first inversion unit 1 and DC bus,
For preventing coil-induced energy from flowing back into DC bus in the work of the second inversion unit 2；It can also be as shown in Fig. 2, described
Switch S1 is arranged between the first inversion unit 1 and ABC winding.Preferably, the switch S1 is semiconductor switch or relay
Switch.
First inversion unit 1 is identical with the structure of the second inversion unit 2, is three phase inverter bridge.
As shown in figure 4, the control method of the double winding three-phase motor, when motor operation is when low speed, the first inversion
Unit 1 and the second inversion unit 2 work at the same time, and all windings are all worked at this time, generate more number of ampere turns, generate big turn
Square, torque capacity is up to T1；Switch S1 is kept open-minded at this time, with meet energy-storage battery release energy and motor power feedback it is double
To energy flow；
As revolving speed increases, into weak magnetic state；When motor speed reaches n3, stop 1 envelope wave of the first inversion unit
Work, the second inversion unit 2 keeps work, and disconnects switch S1, and motor enters single set winding operating mode, only high speed at this time
Drive winding work；Since turns-in-series are less, back-emf is relatively small, reduces the depth of weak magnetic；Switch S1, which is disconnected, to be guaranteed
ABC winding is in and is fully disconnected mode, prevents from generating electric current formation interference magnetic field in ABC winding；
When motor is by high deceleration, when revolving speed is down to n2, make again the first inversion unit 1 start to work, be again introduced into around
Group series model.
The second inversion unit of the utility model 2 continues working, it is ensured that torque and revolving speed output in high low speed handoff procedure
Continuity.
As shown in figure 3, region between n2~n3 be the first inversion unit 1 work or stop can mode, in order to mention
The reasonability of high Winding Design, width are unsuitable wide.
Assuming that needing the flux-weakening ratio of motor is N times (i.e. n4:n1=N) from the angle of application design.It is then sufficiently benefit
With winding, Ying You:
If wishing, the width between n2~n3 is Δ n, is enabledDerivation can obtainToSuch as Δ n=n1, it can also simplify and be chosen for
Motor and control system general frame are as shown in Figure 4.Motor and controller part independent design, in ABC winding and
Abc winding front end is electrically connected.Controller part carries out coordinated control to two groups of inversion units using a control unit,
Single control core can be used in control unit or double control core telecommunications are realized.
Claims (3)
1. a kind of double winding three-phase motor, it is characterised in that: including motor stator winding (3), the three-phase motor stator winding
(3) include two groups, first group be driven at low speed winding, only in low speed by controller incision winding, the number of turns W1, three-phase around
Group is denoted as A, B and C, generally ABC winding respectively；Second group is high-speed driving winding, passes through controller in high speed and low speed
Winding, the number of turns W2 are cut, three-phase windings are denoted as a, b and c, generally abc winding respectively；The number of winding turns of W1 is greater than W2；ABC
Phase difference is not present in winding and the same phase control of abc winding, and ABC winding and the rear end neutral point of abc winding are connected directly；ABC
Winding front end is connected with the output end of the first inversion unit (1), the output end of abc winding front end and the second inversion unit (2)
It is connected；First inversion unit (1) and the second inversion unit (2) are connected in parallel on capacitor both ends；First inversion unit (1)
Electric machine controller (4) are collectively constituted with the second inversion unit (2).
2. a kind of double winding three-phase motor according to claim 1, it is characterised in that: it further include switch (S1), it is described to open
Close (S1) be arranged between the first inversion unit (1) and DC bus or setting the first inversion unit (1) and ABC winding it
Between, it is arranged between the first inversion unit (1) and DC bus, for preventing coil sense when the second inversion unit (2) work
It should be able to measure and flow back into DC bus；The switch (S1) is semiconductor switch or relay switch.
3. a kind of double winding three-phase motor according to claim 1, it is characterised in that: first inversion unit (1) and
The structure of second inversion unit (2) is identical, is three phase inverter bridge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820713791.6U CN208209844U (en) | 2018-05-14 | 2018-05-14 | A kind of double winding three-phase motor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820713791.6U CN208209844U (en) | 2018-05-14 | 2018-05-14 | A kind of double winding three-phase motor |
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| CN208209844U true CN208209844U (en) | 2018-12-07 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108400742A (en) * | 2018-05-14 | 2018-08-14 | 西安清泰科新能源技术有限责任公司 | A kind of double winding three phase electric machine and its control method |
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2018
- 2018-05-14 CN CN201820713791.6U patent/CN208209844U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108400742A (en) * | 2018-05-14 | 2018-08-14 | 西安清泰科新能源技术有限责任公司 | A kind of double winding three phase electric machine and its control method |
| CN108400742B (en) * | 2018-05-14 | 2024-05-03 | 西安清泰科新能源技术有限责任公司 | Double-winding three-phase motor and control method thereof |
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Effective date of registration: 20200811 Address after: 246000 Zongyang economic and Technological Development Zone, Zongyang County, Tongling City, Anhui Province Patentee after: Zongyang shengkong New Energy Technology Co.,Ltd. Address before: 710077 No. 69, Kam Yip Road, hi tech Zone, Shaanxi, Xi'an Patentee before: XI'AN TSINGTECH NEW ENERGY TECHNOLOGY Co.,Ltd. |
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Effective date of registration: 20221027 Address after: Room 401, 4th floor, Jincheng Science and Technology Building, 69 Jinye Road, Xi'an High-tech Zone, Shaanxi Province Patentee after: XI'AN TSINGTECH NEW ENERGY TECHNOLOGY Co.,Ltd. Address before: Zongyang economic and Technological Development Zone, Zongyang County, Tongling City, Anhui Province Patentee before: Zongyang shengkong New Energy Technology Co.,Ltd. |
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