CN207490802U - A kind of four level power circuit of switched reluctance machines - Google Patents
A kind of four level power circuit of switched reluctance machines Download PDFInfo
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- CN207490802U CN207490802U CN201721657582.6U CN201721657582U CN207490802U CN 207490802 U CN207490802 U CN 207490802U CN 201721657582 U CN201721657582 U CN 201721657582U CN 207490802 U CN207490802 U CN 207490802U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
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Abstract
The utility model discloses a kind of four level power circuits of switched reluctance machines, and multiphase independence booster circuit part is increased on the basis of traditional asymmetric power conversion circuit, including：Common boost capacitor C2, switching tube VTA1, VTB1, VTC1, diode VDA1, VDB1, VDC1.By the conducting and shutdown that control switching tube, each phase winding of switched reluctance machines can be made to demagnetize (2) in high-speed excitation (+2), quickly, independent switchover operation under (0) four kind of state of normal excitation (+1) and zero-pressure afterflow, do not interfere with each other.The utility model realizes the independent switching of each four level of phase of switched reluctance machines, can not only carry out normal pressure excitation to winding, moreover it is possible to high-speed excitation and quick demagnetization are carried out to winding.The number of phases of power circuit is equal with the number of phases of machine winding, suitable for arbitrary number of phases motor, is a kind of with high robust, high reliability, compact structure, has huge application prospect.
Description
Technical field
The utility model is related to switched reluctance machines fields, especially relate to apply four level in switched reluctance machines
Power circuit.
Background technology
Driving system for switched reluctance (SRD) is by switched reluctance machines (SRM), power inverter, controller and position
Detection device forms, and is a kind of novel electromechanical integration Alternating Current Governor System, and structure is as shown in Figure 1, wherein, power conversion
Device provides to switched reluctance motor and operates required energy.
SRM power conversion circuits (hereinafter referred to as power circuit) topology design is power converter of switch reluctance motor design
One of key, the topological structure of power conversion circuit has a direct impact SRD system performances, and suitable power inverter can be with
The cost of switched reluctance machines is reduced, improves the dynamic characteristic of switched reluctance machines, widens the application scenario of switched reluctance machines.
For this purpose, a variety of power circuits has been proposed in domestic and foreign scholars, asymmetrical half-bridge power conversion circuit shown in Fig. 2 is current
A kind of switched reluctance machines power conversion circuit being most widely used.
Asymmetrical half-bridge translation circuit has significant advantage in performance, can to SRM, each phase winding realizes that normal pressure is encouraged respectively
Magnetic (+1 state), normal pressure demagnetization (- 1 state) and zero-pressure afterflow (0), are completely independent, and between phase and phase to machine winding
The number of phases does not have any restrictions.In asymmetrical half-bridge translation circuit, per phase bridge arm by two main switching device VTX2 and VTX3 and
Two fly-wheel diode VDX2 and VDX3 compositions.Tool is there are three types of operating mode (as shown in Figure 3) per phase winding for the circuit, with A phases
For winding：
1. switching tube VTA2, VTA3 are open-minded, diode VDA2, VDA3 reversely end, and supply voltage UC1 adds to A phase windings
Both ends, A phase windings operate in high-speed excitation (+1 state)
2. switching tube VTA3 is open-minded, VTA2 shutdowns, diode VDA2 reversely ends, VDA3 forward conductions, A phase windings both ends
Voltage is that 0, A phase windings operate in afterflow (0 state)；
3. switching tube VTA2, VTA3 are turned off, diode VDA3, VDA2 forward conduction, supply voltage UC1 reversely adds to A phases
Winding both ends, capacitance C1 absorb the part magnetic energy of A phase windings, and A phase windings operate in normal pressure demagnetization (- 1 state).
In conclusion asymmetrical half-bridge power conversion circuit has significant advantage in performance, it is flexible particularly convenient for realizing
Control strategy.
But asymmetric power conversion circuit can not achieve the high-voltage excitation (+2 state) of SRM windings and high pressure demagnetization (- 2 shapes
State), it is impossible to meet the requirement of certain high-performance SRD.Especially in high speed operation of motor, the function of high-voltage excitation and high pressure demagnetization
It can become particularly important.
In order to realize the high-speed excitation of SRM windings and quick demagnetization, in the prior art, in asymmetrical half-bridge power conversion electricity
It is improved on the basis of road, it is proposed that four-level converter as shown in Figure 4, the power circuit can be realized open
Close high-speed excitation (+2 state), quick demagnetization (- 2 state), normal pressure excitation (+1 state) and the zero-pressure of each phase winding of reluctance motor
Four kinds of working conditions of afterflow (0 state).Due to the circuit, only there are one each mutually common booster circuits, work as QCDDuring conducting, each phase
Winding can only operate in three kinds of high-speed excitation (+2 state), quick demagnetization (- 2 state) and zero-pressure afterflow (0 state) work shapes
State；Work as QCDDuring shutdown, each phase winding can only operate in normal pressure excitation (+1 state), quick demagnetization (- 2 state) and zero-pressure afterflow (0
State) three kinds of working conditions.It is encouraged it can be seen that each phase windings of SRM cannot be worked at the same time in high-speed excitation (+2 state) and normal pressure
Magnetic (+1 state) loses original (for asymmetric power conversion circuit) independence.This also limits mostly electric
Application range of the flat power circuit at the conducting operation that respectively overlaps (conducting electrical angle is more than 120 degree).
In order to adapt to application of more level power translation circuits when respectively overlapping conducting operation, also propose in the prior art
Four level power circuits as shown in Figure 5, the exclusive design feature that four phase motors are dexterously utilized are distinguished for AC/BD phases
Booster circuit is devised, realizes the independent operating of the adjacent phases of SRM.But shortcoming there are two the circuits, first, this design is thought
Road is not suitable for the SRM that the number of phases is odd number；Second is that the circuit can only meet adjacent alternate independent operating, but when the same luck of needs
When capable machine winding is more than 2 phases (such as three-phase operates in different conditions simultaneously), even if can not realize each phase to four phase SRM
It works independently.
Utility model content
In view of the above-mentioned problems, the utility model proposes four level of novel switched reluctance motor that a kind of each phase has independence
Power circuit by controlling the conducting and shutdown of switching tube in power topology, makes each phase level of switched reluctance machines when arbitrary
Quarter can independently switch, and solve the problem of that motor four level power circuits when being overlapped operation cannot effectively work.
In order to achieve the above objectives, the technical solution of the utility model is realized in：
A kind of four level power circuit of switched reluctance machines, including DC power supply V, electric capacity of voltage regulation C1, boost capacitor C2With by
The bridge arm circuit composition of switching tube and diode composition, the quantity of bridge arm circuit is equal with the number of phases of motor, each bridge arm circuit
On be all connected with a phase machine winding；
The electric capacity of voltage regulation C1It is in parallel with the DC power supply V, the boost capacitor C2Cathode and electric capacity of voltage regulation C1Just
It connects pole；
The bridge arm circuit includes switching tube VT1、VT2、VT3And diode VD1、VD2、VD3；The machine winding
Upper end connecting valve pipe VT2Emitter, the lower end connecting valve pipe VT of machine winding3Collector, switching tube VT3Hair
Emitter-base bandgap grading connects the cathode of DC power supply V；
The diode VD3Anode meet the cathode of DC power supply V, diode VD3Cathode connecting valve pipe VT2Hair
Emitter-base bandgap grading；Diode VD2Anode connecting valve pipe VT3Collector, diode VD2Cathode and switching tube VT1Collector phase
Even；
The switching tube VT1Collector connection boost capacitor C2Anode, switching tube VT1Emitter connecting valve pipe
VT2Collector；The diode VD1Anode connection electric capacity of voltage regulation C1Anode, diode VD1Cathode connecting valve pipe
VT2Collector, diode VD2It is connected to boost capacitor C2Anode.
Further, the switching tube VT1、VT2、VT3Using wholly-controled device.
Compared with prior art, the utility model has following advantageous effect：
The four level power circuit of switched reluctance machines that the utility model is proposed realizes the high-speed excitation of machine winding
With quick demagnetization function, performances of the SRD in high-speed cruising can be effectively improved.In addition to this, which improves existing
Deficiency in four-level converter proposes that a kind of each phase has four level power of novel switched reluctance motor of independence
Translation circuit by controlling the conducting and shutdown of switching tube in power circuit, makes the level of each phase winding of switched reluctance machines exist
Any time can independently switch, and not interfere with each other, and solve existing four level powers circuit and be overlapped in switched reluctance machines multiphase
Each the problem of mutually cannot being completely independent control, be a kind of more blanket structure during operation.Meanwhile realizing each phase winding
Under the premise of working condition independently switches, reduce the quantity of switching device and active device as far as possible, effectively reduce work(
Switching loss, manufacture cost and the volume of rate converter.
Description of the drawings
Fig. 1 is driving system for switched reluctance composition schematic diagram in the prior art；
Fig. 2 is asymmetrical half-bridge power conversion circuit schematic diagram in the prior art；
Fig. 3 is three kinds of working state schematic representations of asymmetrical half-bridge power conversion circuit in the prior art；
Fig. 4 is four level powers circuit diagram of the prior art；
Fig. 5 is four level power circuit diagram of independence of the prior art；
Fig. 6 be the utility model proposes four level power circuit diagrams；
Fig. 7 is high-speed excitation (+2) status diagram of the utility model；
Fig. 8 is normal pressure excitation (+1) status diagram of the utility model；
Fig. 9 is afterflow (0) status diagram of the utility model；
Figure 10 is quick demagnetization (- 2) status diagram of the utility model；
Figure 11 (a) be in the utility model embodiment four level power circuits provide+1 for three-phase windings ,+2,0 three kind of electricity
Flat schematic diagram；
Figure 11 (b) is that four level power circuits provide+1 ,+2, -2 three kinds of electricity for three-phase windings in the utility model embodiment
Flat schematic diagram；
Figure 11 (c) be in the utility model embodiment four level power circuits provide+1 for three-phase windings, 0, -2 three kind of electricity
Flat schematic diagram；
Figure 11 (d) be in the utility model embodiment four level power circuits provide+2 for three-phase windings, 0, -2 three kind of electricity
Flat schematic diagram.
Specific embodiment
It should be noted that in the absence of conflict, the feature in embodiment and embodiment in the utility model can
To be combined with each other.
The utility model proposes a kind of power conversion circuits of switched reluctance machines, are the electricity based on circuit
Road figure is as shown in Figure 6.
As shown in fig. 6, the circuit is mainly by DC power supply V, electric capacity of voltage regulation C1, boost capacitor C2With by switching tube and two poles
The bridge arm circuit composition of pipe composition, the quantity of bridge arm circuit is equal with the number of phases of motor, for the present embodiment uses 3 phases, wherein,
Capacitance C2Cathode and capacitance C1Anode connect together, the connection of the bridge arm circuit part of each phase is identical,
Therefore it is illustrated using A phases as representative, as shown in Fig. 6 dotted line frames, switching tube VTA1By capacitance C2Anode and open
Close pipe VTA2It is connected, diode VDA1By capacitance C1Anode and switching tube VTA2It is connected, upper bridge arm fly-wheel diode VDA2Connection
In boost capacitor C2Anode, be all connected with a phase machine winding on each bridge arm.Four level power of switched reluctance machines
Device for power switching in circuit in booster circuit and winding bridge arm uses wholly-controled device.
Tool is there are four types of operating mode (Fig. 7-10) per phase winding for the circuit, still by taking A phase windings as an example：
1. switching tube VTA1、VTA2、VTA3It is open-minded, diode VDA1、VDA2、VDA3Reversely cut-off, voltage UC1+UC2Add to A
Phase winding both ends, A phase windings operate in high-speed excitation (+2) state；
2. switching tube VTA2、VTA3Conducting, VTA1Shutdown, diode VDA1Conducting, VDA2、 VDA3Cut-off, supply voltage UC1
A phase windings both ends are added to, A phase windings operate in normal pressure excitation (+1) state；
3. switching tube VTA3It is open-minded, switching tube VTA1、VTA2Shutdown, diode VDA1、VDA2Reversely cut-off, VDA3Positive guide
Logical, A phase windings both end voltage operates in afterflow (0) state for 0, A phase windings；
4. switching tube VTA1、VTA2、VTA3Shutdown, diode VDA2、VDA3Forward conduction, voltage UC1+UC2Reversely it is added in A
Phase winding both ends, A phase windings operate in quick demagnetization (- 2) state.
This power circuit can make SRM be operated in -2 per phase winding, 0 ,+1 ,+2 four kind of working condition, realize the fast of winding
Fast excitation and quick demagnetization provide possibility to improve performances of the SRD in high-speed cruising.Each phase winding work is realized simultaneously
State is completely independent, and will not be limited in switch operating state by other winding working conditions.This causes switching magnetic-resistance
The working condition of each phase winding of motor can independently switch at any time, solve motor four level powers when being overlapped operation
The problem of circuit cannot effectively work helps to take more flexible control strategy, further improves the performance of SRD.
Work, Figure 11 are completely independent between can guarantee each phase winding of motor in order to illustrate the more level power circuits proposed
(a) situation of 4 kinds of the most extreme overlapping conductings is had chosen to Figure 11 (d), the realization of these four situations is demonstrated in two-phase weight
During folded conducting, the realization of (+1, -2), (+1 ,+2), (+1,0), (+2,0), (+2, -2), (- 2,0) six kinds of overlapping on-states,
It also demonstrates in three-phase overlapping conducting simultaneously, (+1 ,+2,0), (+1 ,+2, -2), (+1,0, -2), (+2,0, -2) four kinds of weights
The realization of folded conducting state.That is, the more level power circuits proposed are suitable for the switched reluctance machines of the arbitrary number of phases,
It is each mutually can independent control, any level in respectively four level, and the number of motor phases for being overlapped operation may be less than being equal to motor
The arbitrary number of phases of the number of phases.The circuit realizes the high-speed excitation and quick demagnetization function to machine winding.Below with reference to diagram
To these four, extreme working condition is described in detail.
Demonstrated as shown in Figure 11 (a) power circuit be respectively each phase winding provide+1 ,+2,0 three kind of level,
Middle VTA2、VTA3Conducting, VTA1Shutdown, C1The voltage at both ends passes through VDA1、 VTA2、VTA3It is added in A phase windings, i.e.+1 state；
VTB1、VTB2、VTB3Conducting, C1、 C2Superimposed voltage pass through VTB1、VTB2、VTB3It is added in B phase windings, i.e.+2 states；VTC3It leads
It is logical, VTC2、VTC1Shutdown, winding C pass through VTC3、VDC3Short circuit, both end voltage 0, i.e. 0 state.It can be illustrated by this figure,
The four level power circuit of switched reluctance machines can be respectively each phase offer+1 ,+2,0 three kind of level simultaneously.
It is that demonstrate the power circuit be respectively that each phase winding provides+1 ,+2, -2 three kinds of level as shown in Figure 11 (b),
A, identical, the VTC of C phases in the situation of B two-phases and Figure 11 (a)2、VTC1、 VTC3Shutdown, C1、C2Superimposed voltage pass through VDC1、
VDC2、VDC3Reversely it is added in C phase windings both ends, i.e. -2 states.It can be illustrated by this figure, four level of switched reluctance machines
Power circuit can be respectively that each phase provides+1 ,+2, -2 three kinds of level simultaneously.
Demonstrated as shown in Figure 11 (c) each phase be respectively winding provide+1,0, -2 three kind of level, the situation of A, C two-phase and
It is identical in Figure 11 (b), respectively+1, -2 states；B phases are identical with the C phases in Figure 11 (a), are 0 state.By Ben Tu it may be said that
Bright, the four level power circuit of switched reluctance machines can be respectively each phase offer+1,0, -2 three kind of level simultaneously.
Demonstrated as shown in Figure 11 (d) each phase be respectively winding provide+2,0, -2 three kind of level, the situation of B, C two-phase and
It is identical in Figure 11 (c), respectively 0, -2 states；A phases are identical with the B phases in Figure 11 (b), are+2 states.By Ben Tu it may be said that
Bright, the four level power circuit of switched reluctance machines can be respectively each phase offer+2,0, -2 three kind of level simultaneously.
The boost capacitor C of the utility model2, cathode is connected with positive pole, anode and switching tube VTA1、 VTB1、
VTC1Source electrode be connected.From a structural point, boost capacitor C2All asymmetrical half-bridge arms is returned to share, such design can have
Effect reduces the volume of power conversion circuit, but due to switching tube VTA1、 VTB1、VTC1Presence, circuit can't be influenced
Function (will not make winding respectively mutually become not only to stand).
In conclusion the power conversion circuit of the utility model and previous more level power translation circuits most it is basic not
Same point is that four kinds of operating modes of every phase winding can independently switch, and is not limited by the operating mode of other phases.In addition to this,
The power circuit is applicable in, each phase work in single-phase conducting, multiphase conducting (maximum simultaneously turns on the number of phases equal to the practical number of phases of motor)
Operation mode can be with independent control.
From a structural point, the utility model proposes more level power translation circuits converted with existing more level powers
Circuit is maximum difference lies in all having a switching tube between the upper bridge arm switching tube source electrode and boost capacitor of each of which bridge arm,
The control to the current potential is used to implement, this is that the circuit realizes the basic reason that each phase works independently.
In addition to this, as soon as it is independent more to complete each phase only comprising capacitance for the more level power translation circuits proposed
The realization of level, the capacitance cathode are connected with positive pole, anode and switching tube VTA1、VTB1、 VTC1Collector be connected.Cause
For conventional thinking, to realize more level of each phase and independent switching simultaneously, multiple booster circuits, Jin Erzeng are needed
Add the quantity of boost capacitor.
This power circuit is applied into driving system for switched reluctance, it can be utilized to demagnetize with high-voltage excitation and high pressure
Advantage, to improve the output performance of SRD.
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this
Within the spirit and principle of utility model, any modification, equivalent replacement, improvement and so on should be included in the utility model
Protection domain within.
Claims (2)
1. a kind of four level power circuit of switched reluctance machines, which is characterized in that including DC power supply V, electric capacity of voltage regulation C1, boosting
Capacitance C2It is formed with the bridge arm circuit being made of switching tube and diode, the quantity of bridge arm circuit is equal with the number of phases of motor, often
A phase machine winding is all connected in a bridge arm circuit；
The electric capacity of voltage regulation C1It is in parallel with the DC power supply V, the boost capacitor C2Cathode and electric capacity of voltage regulation C1Anode string
Connection；
The bridge arm circuit includes switching tube VT1、VT2、VT3And diode VD1、VD2、VD3；The upper end of the machine winding
Connecting valve pipe VT2Emitter, the lower end connecting valve pipe VT of machine winding3Collector, switching tube VT3Emitter connect
The cathode of DC power supply V；
The diode VD3Anode meet the cathode of DC power supply V, diode VD3Cathode connecting valve pipe VT2Emitter；
Diode VD2Anode connecting valve pipe VT3Collector, diode VD2Cathode and switching tube VT1Collector be connected；
The switching tube VT1Collector connection boost capacitor C2Anode, switching tube VT1Emitter connecting valve pipe VT2's
Collector；The diode VD1Anode connection electric capacity of voltage regulation C1Anode, diode VD1Cathode connecting valve pipe VT2's
Collector, diode VD2Cathode be connected to boost capacitor C2Anode.
A kind of 2. four level power circuit of switched reluctance machines according to claim 1, which is characterized in that the switching tube
VT1、VT2、VT3Using wholly-controled device.
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| CN2017201593855 | 2017-02-20 | ||
| CN201720159385 | 2017-02-20 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107809195A (en) * | 2017-02-20 | 2018-03-16 | 天津工业大学 | A kind of level power circuit of switched reluctance machines four and application method |
| CN110112985A (en) * | 2019-05-15 | 2019-08-09 | 哈尔滨理工大学 | A kind of novel switched reluctance machines multi-level power converter |
| CN110212824A (en) * | 2019-06-12 | 2019-09-06 | 中国计量大学 | A kind of direct high voltage output double-fed switch reluctance generator converter system |
-
2017
- 2017-12-01 CN CN201721657582.6U patent/CN207490802U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107809195A (en) * | 2017-02-20 | 2018-03-16 | 天津工业大学 | A kind of level power circuit of switched reluctance machines four and application method |
| CN107809195B (en) * | 2017-02-20 | 2023-07-21 | 天津工业大学 | Four-level power circuit of switched reluctance motor and use method |
| CN110112985A (en) * | 2019-05-15 | 2019-08-09 | 哈尔滨理工大学 | A kind of novel switched reluctance machines multi-level power converter |
| CN110212824A (en) * | 2019-06-12 | 2019-09-06 | 中国计量大学 | A kind of direct high voltage output double-fed switch reluctance generator converter system |
| CN110212824B (en) * | 2019-06-12 | 2021-02-12 | 中国计量大学 | Double-fed switched reluctance generator current transformation system |
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