CN106602963A - Electric drive unit, electric device, inverter, and multiphase AC motor - Google Patents
Electric drive unit, electric device, inverter, and multiphase AC motor Download PDFInfo
- Publication number
- CN106602963A CN106602963A CN201611162491.5A CN201611162491A CN106602963A CN 106602963 A CN106602963 A CN 106602963A CN 201611162491 A CN201611162491 A CN 201611162491A CN 106602963 A CN106602963 A CN 106602963A
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- Prior art keywords
- motor
- current
- phase
- inverter
- polyphase windings
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P27/00—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage
- H02P27/04—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage
- H02P27/06—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using dc to ac converters or inverters
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/53—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/537—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters
- H02M7/5387—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/0083—Converters characterised by their input or output configuration
- H02M1/009—Converters characterised by their input or output configuration having two or more independently controlled outputs
Abstract
The invention provides an electric drive unit, an electric device, an inverter, and a multiphase AC motor. The electric drive unit includes a multiphase AC motor, a DC power supply, and an inverter. The phase number of the multiphase AC motor is M, the multiphase AC motor has rated line voltage and related line current; the DC power supply has constant power supply voltage corresponding to the rated line voltage to provide direct current corresponding to the rated line current; and the inverter converts the direct current into the alternating current according to the control signal and supplies the alternating current to the multiphase AC motor. The multiphase AC motor has N mutually independent multi-phase windings, the inverter has N inversion units corresponding to the N multiphase windings, each inversion unit has M inversion legs that are in mutual parallel connection to supply M line current to the corresponding multi-phase windings, and the M and N are the positive integers of 2 or more.
Description
Technical field
The invention belongs to alternating current generator field, more particularly to a kind of high current multi-phase AC motor, comprising the polyphase ac
The alternating current generator component and the Vidacare corp comprising alternating current generator component and motorized motions equipment of motor and inverter.
Background technology
With the raising of environmental requirement, the exhaust emissions of various equipment of the country to fuel oil is originated as energy is also managed
It is increasingly stricter, therefore, using electricity as the energy electrical equipment such as electric automobile, electric tool etc. increasingly by manufacturer
With the favor of consumer.In addition, electrical equipment also has that energy utilization rate is high than fuel oil equipment, simple structure, noise are little, dynamic
Performance is good and the advantages of high portability.
Generally, electrical equipment is using battery as power supply.As the power of electrical equipment less (no more than 800w), can be with
Direct current generator is powered by chopper as drive member, battery to direct current generator.But when the supply voltage of electrical equipment is limited,
When power is larger, the electric current of direct current generator is naturally also bigger, is limited by diverter and brush, and diverter is easier to produce fire
Flower, so as to cause direct current generator to be burned.Therefore, powerful electrical equipment is often selected to bear the exchange of larger current
Motor.
By taking three phase alternating current motor as an example, in three phase alternating current motor control system, as shown in Fig. 2 controller is by triggering
The turn-on and turn-off of the thyristor on signal control three-phase inverter bridge arm obtain symmetrical three-phase alternating voltage, and
In being loaded into machine winding.In whole process, rotating speed and torque of the controller by various control strategy controlled motors
Etc. target.
With the increase of the Vidacare corp with feedback control and motorized motions apparatus of load, power input to a machine
With increase.If the power factor of motor is constant, when inverter input terminal DC voltage size because the constraint of a variety of causes
And cannot be with the increase of load in the case of increasing, the input current of motor is inevitably enlarged, that is to say, that inverter it is defeated
Go out electric current to inevitably enlarge, the electric current for flowing through inverter power switch element is inevitably enlarged.In order to ensure system worked well, power
Switch element must be bigger from rated operational current.
However, it is affected by various conditions, the power switch of the big operating current required by heavy-duty motor can be born
Element price is very high or cannot buy, and does not even exist, in this case, often from two or more total prices
Lattice are low, and easily the relatively small switch element of the rated operational current of purchase replaces a high-current switch element, typically handle
This method is referred to as parallel connection.
Fig. 3 is the annexation schematic diagram of high current three phase alternating current motor common in the art and inverter, by Fig. 3
Understand, inverter adopts Current Sharing Technology, and the line current of each phase of alternating current generator is all by j homophase inverter leg in parallel
It is common to provide.In theory, the current value for being flow through in the thyristor on each inverter leg is alternating current generator line
J/mono- of electric current, that is to say, that a line electricity of this j small current thyristor shared motor in parallel
Stream.
It follows that a single low current switch element cannot undertake the line current of a high current motor, if
There is high current and flow through single low current switch element, surmounted the situation of the ability to bear of low current switch element, little electricity
Stream switch element is necessarily damaged.
In the case where switching characteristic concordance is very high, thyristor in parallel can be simultaneously turned on and closed simultaneously
Disconnected, so as to the high current for sharing each line of motor jointly during turning on, flowing effect then can be preferable.But this semiconductor switch
Element needs to be chosen carefully from substantial amounts of switch element just can obtain, and causes use cost very high, and switch element in parallel is got over
Many, cost more steeply rises.Additionally, even if these switch elements picked out concordance in using front test process is high,
With the impact of use environment and device aging, it is also difficult to which guarantee still can keep in use so high concordance.
Based on this consideration, so the total rated operational current of parallel switching element is greater than motor line current a lot, usually 2-3
Times.
Affected by various factors, when switch element is changed into conducting state from off state, if the little electricity of parallel connection
Stream switch element cannot be simultaneously turned on to cause to be lost in and lost, then the single switch element of shorting advance will flow through very big electricity
Machine line current, so as to damaging occurs in switch element；Same reason, when switch element is changed into off state from conducting state
When, if the low current switch element of parallel connection cannot simultaneously turn off to cause to be lost in lost, then that switch for finally turning off
Element will also flow through very big motor line current, so as to damaging occurs in switch element.
As the growth of switch element parallel connection quantity, the concordance of its switching characteristic are more difficult to ensure that, stream effect is caused
Fruit is poorer, and so as to the probability damaged is higher, problem is more serious.Due to the Current Sharing Technology cannot ensure it is any number of simultaneously
The switch element of connection is simultaneously turned on and simultaneously turned off, and has a strong impact on and limit the increase of high current motor current value so that
High current motor becomes an obstacle for being difficult to cross over.
Further, in the case where contravarianter voltage is battery-powered, because cell voltage amplitude is limited, well below friendship
The situation of stream power supply, causes problem more serious, and then it is especially heavy to have had a strong impact on battery powered electric tool, electric motor car
The development of electronic battlebus, electronic warship and electric drive aircraft carrier in electric motor car, electric ship, or even national defence.
The content of the invention
The present invention is carried out to solve the above problems, by the inverter bridge leg independence and electric current that provide a kind of same phase
The inverter of decoupling, the multi-phase AC motor comprising multiple polyphase windings being independently mounted on armature and comprising the inverter
With the Vidacare corp and electrical equipment of the multi-phase AC motor, the Current Sharing Technology of switch element is eliminated, used
In the case of common low current switch element, the current value of motor can arbitrarily increase.
To achieve these goals, following technical proposals be present invention employs：
<Structure one>
The invention provides a kind of Vidacare corp, in being arranged on electrical equipment, for driving the electrical equipment, bag
Include：Multi-phase AC motor, its number of phases is k, with rated line voltage and specified line current；DC source, with specified line
The power supply of the corresponding constant voltage of voltage, for providing the unidirectional current corresponding with specified line current；Inverter, according to control
Unidirectional current is converted to alternating current and is supplied to multi-phase AC motor by signal.With such technical characteristic：Wherein, polyphase ac
Motor has j separate polyphase windings, and inverter has the j inversion unit corresponding with j polyphase windings difference,
There is each inversion unit the k inverter bridge leg being connected in parallel to each other to provide k line currents, k and institute to corresponding polyphase windings
State the positive integer that j is more than 2.
The Vidacare corp that the present invention is provided can also have such technical characteristic：Each inverter bridge leg contains mutually
The upper bridge arm thyristor being connected in series and lower bridge arm thyristor, upper bridge arm thyristor and
Lower bridge arm thyristor has the predetermined maximum output current of identical.The Vidacare corp also includes：Controller, root
According to the predetermined work cycle between upper bridge arm thyristor and lower bridge arm semiconductor element, and according to upper bridge arm partly
The corresponding pulse signal of the conducting electric current of conductor switch element or lower bridge arm semiconductor element within the corresponding working time,
The control signal is provided to inverter.
The Vidacare corp that the present invention is provided can also have the feature that：When upper bridge arm thyristor with
And the maximum output current of lower bridge arm thyristor is I1, the described specified line current of multi-phase AC motor is INWhen, it is many
Number j of phase winding meets following conditions：
J ＞ IN÷I1
The Vidacare corp that the present invention is provided can also have the feature that：DC source is battery or alternating current power supply
The DC source obtained after rectified filtering, the number of phases of multi-phase AC motor is more than or equal to three, and the number of phases of polyphase windings is equal to more
The number of phases of cross streams motor.
The Vidacare corp that the present invention is provided can also have the feature that：When the number of phases of polyphase windings is equal to three,
Three-phase windings connection triangular in shape, three inverter bridge legs connect respectively with three head and the tail contacts of corresponding three-phase windings, so as to
Line current is provided.
The Vidacare corp that the present invention is provided can also have the feature that：Polyphase windings are in Y-connection, multiple
Inverter bridge leg connects respectively with multiple end points of corresponding polyphase windings, so as to provide line current.
The Vidacare corp that the present invention is provided can also have the feature that：Polyphase windings are independently mounted at an electricity
On pivot or multiple armatures, armature is the stator or rotor of the multi-phase AC motor.Multi-phase AC motor is asynchronous machine, synchronization
Any one in motor, switched reluctance machines and brshless DC motor.Thyristor is wholly-controled device, and this is complete
Control type device is electric power field-effect transistor, gate level turn-off thyristor, integrated gate commutated thyristor, insulated gate bipolar crystalline substance
Any one in body pipe and electric power bipolar transistor.
<Structure two>
Further, it is separate with rated line voltage and volume containing j present invention also offers a kind of inverter
Alignment electric current and the number of phases for the polyphase windings of k multi-phase AC motor, and with constant supply voltage and for providing
The galvanic DC source corresponding with the specified line current is respectively connected with, for being turned unidirectional current according to control signal
It is changed to alternating current and is supplied to the multi-phase AC motor, with such technical characteristic：Distinguish phase including with j polyphase windings
Corresponding j inversion unit.Wherein, each inversion unit has the inverter bridge leg that k is connected in parallel to each other, so as to corresponding
The polyphase windings provide k line currents, and the k and j is more than 2 positive integer.
<Structure three>
Further, present invention also offers a kind of number of phases has intersecting more for rated line voltage and specified line current for k
Stream motor, and will be come from constant voltage with j inversion unit and according to control signal by j inversion unit
The unidirectional current of DC source output is converted to the inverter of alternating current and is connected, with such technical characteristic：With j mutually
Independent polyphase windings.Wherein, j polyphase windings are corresponding with j inversion unit respectively, and it is inverse that each polyphase windings receives each
Become the k line currents that the k in the unit inverter bridge leg being connected in parallel to each other is provided, k and j is more than 2 positive integer.
<Structure four>
Further, present invention also offers a kind of electrical equipment containing above-mentioned Vidacare corp.
The effect of invention and effect
Vidacare corp, electrical equipment, inverter and the multi-phase AC motor provided according to the present invention, due to multiphase
Alternating current generator has j separate polyphase windings, and inverter has the j inversion corresponding with j polyphase windings difference
There is unit, each inversion unit the k inverter bridge leg being connected in parallel to each other to provide k line currents to corresponding polyphase windings,
So that each polyphase windings is operated alone by corresponding inversion unit, two neighboring polyphase windings are not interfere with each other, and then are caused
The electric current of multi-phase AC motor can arbitrarily increase as needed, not only retain the ripe control algolithm of original inverter and exchange
The mature technology of motor, and the requirement to thyristor consistency of performance is reduced, opened using common quasiconductor
Close element and can meet and require, it is to avoid concordance of choosing carefully from substantial amounts of thyristor high switch element institute
The consuming of a large amount of manpower and financial resources brought.
Additionally, the Vidacare corp of the present invention can break foreign countries for the monopolization of great current drive device so that should
Vidacare corp can not only replace the slow electromotor of toggle speed and be applied to that the heavy machine of motor cannot be adopted at present
Che Shang, such as truck, bull-dozer, excavator heavy-duty engine etc., additionally it is possible to be applied in military affairs need the electronic war of more high current
On car, electronic warship and electric drive aircraft carrier, the production domesticization of the Vidacare corp of low-voltage, high-current is realized.
Therefore, Vidacare corp of the invention has reasonable in design, simple a, low cost, stable work in work, can
Lean on, long service life, strong environmental adaptability, average switch loss it is little the advantages of.
Description of the drawings
Fig. 1 is the electrical block diagram of the Vidacare corp of the embodiment of the present invention；
Fig. 2 is the electrical block diagram of small current multi-phase AC motor of the prior art and inverter；
Fig. 3 is the electrical block diagram of high current multi-phase AC motor of the prior art and inverter；
Specific embodiment
The specific embodiment of the present invention is illustrated below in conjunction with accompanying drawing.
Fig. 1 is the electrical block diagram of the Vidacare corp in the present embodiment.
Vidacare corp 10 be arranged on electrical equipment for example electric tool, four-axle aircraft, electric automobile, electric ship,
In commercial power electrical forklift, electronic military equipment, for driving electrical equipment.As shown in figure 1, Vidacare corp 10 is included directly
Stream power supply, inverter 12, multi-phase AC motor 13, controller 14 and triggers circuit 15.
DC source is that inverter 12 provides unidirectional current；Inverter 12 is sent according to controller 14 by triggers circuit 15
Unidirectional current is converted to alternating current and is supplied to multi-phase AC motor 13 by control signal.In the present embodiment, DC source is battery
Or the DC source obtained after the rectified filtering of alternating current power supply, often from battery.
Multi-phase AC motor 13 have the separate multiphases of the j on being independently mounted at an armature or multiple armatures around
Group 131, each polyphase windings 131 are k phases.In the present embodiment, k is three, i.e., multi-phase AC motor 13 is three phase alternating current motor,
Accordingly, polyphase windings 131 are three-phase windings, and each three-phase windings has winding A, B, C of three connections triangular in shape.At this
In embodiment, armature is the stator or rotor of multi-phase AC motor, and multi-phase AC motor is asynchronous machine, synchronous motor, switch
Any one in reluctance motor and brshless DC motor.
The DC terminal voltage of inverter 12 is Udc, including j inversion unit 121 corresponding with j polyphase windings respectively,
Each inversion unit 121 has three and is connected in parallel to each other and structure identical A phase inverter bridge leg, B phases inverter bridge leg and C
Phase inverter bridge leg.
A phases inverter bridge leg and A phase windings are connected with the contact AC of C phase windings, B phases inverter bridge leg and B phase windings and A phases around
The contact BA connections of group, C phases inverter bridge leg and C phase windings are connected with the contact CB of B phase windings, provide line electricity to winding respectively
Stream.
Containing the upper bridge arm thyristor 121a and lower bridge arm half being connected in series with each other on each inverter bridge leg
Conductor switch element 121b.That is, the inversion unit that each three-phase windings 131 is made up of six thyristors
121 are operated alone.
Upper bridge arm thyristor 121a and lower bridge arm thyristor 121b have the predetermined maximum of identical
Output current.Maximum output current is also referred to as maximum continuous operating current, or claims rated operational current, is semiconductor switch unit
One important parameter of part, when only below this current value, thyristor is possible to stable operation, if work
Make electric current more than this current value, thyristor will be breakdown due to excessively stream, so as to damage.
In the present embodiment, thyristor is wholly-controled device, and the wholly-controled device is electric power field effect transistor
Pipe, gate level turn-off thyristor, integrated gate commutated thyristor, insulated gate bipolar transistor and electric power bipolar transistor
In any one.
Controller 14 is according to predetermined between upper bridge arm thyristor 121a and lower bridge arm semiconductor element 121b
Working cycle, and according to upper bridge arm thyristor 121a or lower bridge arm semiconductor element 121b in corresponding work
Make the corresponding pulse signal of conducting electric current in the time, to triggers circuit 15 signal is provided.
Triggers circuit 15 includes A phase triggers circuits, B phases triggers circuit and C phase triggers circuits, the three-phase trigger circuit point
Not to the upper bridge arm thyristor 121a and lower bridge on A phase inverter bridge legs, B phases inverter bridge leg and C phase inverter bridge legs
Arm semiconductor element 121b provides trigger, allows its on and off.
Number j of the polyphase windings in the present embodiment is integer, meets following condition：J ＞ I ÷ I1.I in the formula1For single
The maximum output current of bridge arm；I corresponding when being P for the rated power of multi-phase AC motor specified line current.
The determination thinking of j is as follows：Suitable thyristor is selected first, determines its unary continuous work electricity
Flow valuve (considers the impact of various factors, less than rated operational current), is then calculated according to above formula and is rounded up and obtains j.
When machine winding group is split into j polyphase windings in parallel, if around group be not and around or be difficult to directly
During fractionation, it is possible to use the principle of equal effects redesigns winding, winding and winding number is defined as the integral multiple of j or j.
It is of course also possible to not according to I1To determine j, but j is directly set, then again selecting suitable switch element,
As long as ensureing that single bridge arm can stably provide the line current of three-phase windings.
The only coupled polyphase windings of the output current of any one inverter bridge leg have relation, with other multiphases
Winding and its corresponding inverter bridge leg output current do not have the coupling contact of any electricity.Even if all inverter bridge legs of a certain phase
There is the inconsistent situation of switching characteristic in switch element, cause the torque produced by each polyphase windings in the size of switching moments
It is inconsistent, due to the time of switching elements conductive and turn off process it is very little, and motor and its load be one relatively very big
Inertial mass, the inconsistent impact of this torque is very little, is negligible completely.
The effect of embodiment and effect
Vidacare corp, electrical equipment, inverter and the multi-phase AC motor provided according to the present embodiment, due to many
Cross streams motor has j separate polyphase windings, and inverter has individual inverse with the j corresponding j of polyphase windings difference
Become unit, there is each inversion unit the k inverter bridge leg being connected in parallel to each other to provide k routes electricity to corresponding polyphase windings
Stream so that each polyphase windings is operated alone by corresponding inversion unit, and two neighboring polyphase windings do not interfere with each other, and then cause
The electric current of multi-phase AC motor can arbitrarily increase as needed, not only retain the ripe control algolithm of original inverter and exchange
The mature technology of motor, and the requirement of the consistency of performance to thyristor is reduced, using common quasiconductor
Switch element can meet and require, it is to avoid the high switch element of concordance of choosing carefully from substantial amounts of thyristor
The a large amount of manpower and financial resources brought consuming.
Additionally, the Vidacare corp of the present invention can break foreign countries for the monopolization of great current drive device so that should
Vidacare corp can not only replace the slow electromotor of toggle speed and be applied to that the heavy machine of motor cannot be adopted at present
Che Shang, such as truck, bull-dozer, excavator heavy-duty engine etc., additionally it is possible to be applied in military affairs need the electronic war of more high current
On car, electronic warship and electric drive aircraft carrier, the production domesticization of the Vidacare corp of low-voltage, high-current is realized.
Therefore, Vidacare corp of the invention has reasonable in design, simple, low cost, and caloric value is little, workability
Can be stable, reliable, the advantages of long service life, strong environmental adaptability, little average switch loss.
Additionally, from the point of view of another angle, it is also possible to think, the Vidacare corp of the present embodiment is inverter bridge leg
The overlaying relation of parallel relationship and inverter bridge leg output current is transferred to the magnetomotive synthesis of the individual separate polyphase windings of j and closes
System.Because magnetomotive force is not result in switch element excessively stream, so as to solve the bottleneck problem of high current motor, theoretically come
See, motor can realize required any high current.
In the above-described embodiments, three-phase windings connection triangular in shape, three inverter bridge legs respectively with corresponding three-phase windings
Three head and the tail contacts connection, so as to provide line current.Used as the Vidacare corp of the present invention, three-phase windings can also be in star
Shape connects, and now three inverter bridge legs connect respectively with three end points of corresponding three-phase windings, so as to provide line current.
In the above-described embodiments, the present invention is elaborated by taking three phase electric machine as an example, but as the present invention's
Vidacare corp, multi-phase AC motor is not limited to three phase alternating current motor, can also be the motor of other numbers of phases.
Ultimate principle, principal character and the advantages of the present invention of the present invention has been shown and described above.The technology of the industry
Personnel it should be appreciated that the present invention is not restricted to the described embodiments, the simply explanation described in above-described embodiment and description this
The principle of invention, without departing from the spirit and scope of the present invention, the present invention also has various changes and modifications, these changes
Change and improvement is both fallen within scope of the claimed invention.The claimed scope of the invention by appending claims and its
Equivalent thereof.
Claims (10)
1. a kind of Vidacare corp, in being arranged on electrical equipment, for driving the electrical equipment, including：
Multi-phase AC motor, its number of phases is k, with rated line voltage and specified line current；
DC source, the power supply with the constant voltage corresponding with the rated line voltage, for providing and the specified line
The corresponding unidirectional current of electric current；
Inverter, is converted to alternating current and is supplied to the multi-phase AC motor according to control signal by the unidirectional current,
It is characterized in that：
Wherein, the multi-phase AC motor has j separate polyphase windings,
The inverter has the j inversion unit corresponding with the j polyphase windings difference,
There is each described inversion unit the k inverter bridge leg being connected in parallel to each other to provide k roads to the corresponding polyphase windings
Line current,
The k and the j are more than 2 positive integer.
2. Vidacare corp according to claim 1, it is characterised in that：
Wherein, each described inverter bridge leg contains the upper bridge arm thyristor that is connected in series with each other and lower bridge arm is partly led
Body switch element,
The upper bridge arm thyristor and the lower bridge arm thyristor have the predetermined maximum output of identical
Electric current,
The Vidacare corp also includes：
Controller, according to the predetermined work between the upper bridge arm thyristor and the lower bridge arm thyristor
Make the cycle and according to working corresponding with the upper bridge arm thyristor or the lower bridge arm semiconductor element
The corresponding pulse signal of conducting electric current in time, to the inverter control signal is provided.
3. Vidacare corp according to claim 2, it is characterised in that：
Wherein, when the upper bridge arm thyristor and the maximum output current of the lower bridge arm thyristor
For I1, the described specified line current of the multi-phase AC motor is INWhen,
Number j of the polyphase windings meets following conditions：
J ＞ IN÷I1。
4. Vidacare corp according to claim 1, it is characterised in that：
Wherein, the DC source is the DC source obtained after battery or the rectified filtering of alternating current power supply,
The number of phases of the multi-phase AC motor is more than or equal to three, and the number of phases of the polyphase windings is equal to the phase of multi-phase AC motor
Number.
5. Vidacare corp according to claim 4, it is characterised in that：
Wherein, the number of phases of the polyphase windings be equal to three, the polyphase windings be three-phase windings, three-phase windings company triangular in shape
Connect,
Three inverter bridge legs connect respectively with three head and the tail contacts of the corresponding three-phase windings, so as to provide the line
Electric current.
6. Vidacare corp according to claim 4, it is characterised in that：
Wherein, the number of phases of the polyphase windings is more than or equal to three, and polyphase windings are in Y-connection,
Bridge arm number is equal to the inverter bridge leg of the polyphase windings number of phases and connects with multiple end points of the corresponding polyphase windings respectively
Connect, so as to provide the line current.
7. Vidacare corp according to claim 2, it is characterised in that：
Wherein, the polyphase windings are independently mounted on an armature or multiple armatures,
The armature is the stator or rotor of the multi-phase AC motor,
The multi-phase AC motor is any in asynchronous machine, synchronous motor, switched reluctance machines and brshless DC motor
One kind,
The upper bridge arm thyristor or the lower bridge arm thyristor are wholly-controled device, the full-control type device
Part be electric power field-effect transistor, gate level turn-off thyristor, integrated gate commutated thyristor, insulated gate bipolar transistor with
And any one in electric power bipolar transistor.
8. a kind of inverter, has rated line voltage and specified line current and separate many containing j with the number of phases for k
The multi-phase AC motor of phase winding and with constant voltage and for providing the direct current corresponding with the specified line current
The DC source of electricity is respectively connected with, for the unidirectional current being converted to into alternating current according to control signal and being supplied to described many
Cross streams motor, it is characterised in that include：
The j inversion unit corresponding with the j polyphase windings difference,
Wherein, each described inversion unit has the inverter bridge leg that k is connected in parallel to each other, so as to the corresponding multiphase around
Group provides k line currents,
The k and the j are more than 2 positive integer.
9. a kind of number of phases has the multi-phase AC motor of rated line voltage and specified line current for k, and with j inversion unit
And the unidirectional current of the output of the DC source with constant voltage will be come from by the j inversion unit according to control signal
The inverter for being converted to alternating current is connected, it is characterised in that have：
J separate polyphase windings,
Wherein, the j polyphase windings are corresponding with the j inversion unit respectively, and each described polyphase windings receives each
The k line currents that the k inverter bridge leg being connected in parallel to each other in the inversion unit is provided,
The k and the j are more than 2 positive integer.
10. a kind of electrical equipment, it is characterised in that include：
Vidacare corp any one of claim 1～7.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611162491.5A CN106602963A (en) | 2016-12-15 | 2016-12-15 | Electric drive unit, electric device, inverter, and multiphase AC motor |
| PCT/CN2017/115332 WO2018108040A1 (en) | 2016-12-15 | 2017-12-08 | Electric driving device, electric equipment, inverter and multiphase alternating current motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201611162491.5A CN106602963A (en) | 2016-12-15 | 2016-12-15 | Electric drive unit, electric device, inverter, and multiphase AC motor |
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| CN106602963A true CN106602963A (en) | 2017-04-26 |
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| CN201611162491.5A Pending CN106602963A (en) | 2016-12-15 | 2016-12-15 | Electric drive unit, electric device, inverter, and multiphase AC motor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018108040A1 (en) * | 2016-12-15 | 2018-06-21 | 上海理工大学 | Electric driving device, electric equipment, inverter and multiphase alternating current motor |
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| CN1705210A (en) * | 2004-05-31 | 2005-12-07 | 中原工学院 | Multi-three-phase permanent magnet synchronous motor with power supplied by an inverter |
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