CN107196576B - A kind of power converter of switch reluctance motor and its control method - Google Patents
A kind of power converter of switch reluctance motor and its control method Download PDFInfo
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- CN107196576B CN107196576B CN201710572551.9A CN201710572551A CN107196576B CN 107196576 B CN107196576 B CN 107196576B CN 201710572551 A CN201710572551 A CN 201710572551A CN 107196576 B CN107196576 B CN 107196576B
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- 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
- H02P25/00—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details
- H02P25/02—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details characterised by the kind of motor
- H02P25/08—Reluctance motors
- H02P25/092—Converters specially adapted for controlling reluctance motors
Abstract
A kind of power converter of switch reluctance motor and its control method, power inverter is made of power inverter main circuit, excitation circuit, charging circuit, the power inverter main circuit is connect with the excitation circuit and the charging circuit, and charging circuit is connect with excitation circuit；Excitation circuit according to electric generator/electric motor difference working condition requirement can free switching become and adapt to the power supply of corresponding operating condition, charging circuit work when excitation circuit battery needs to charge, the structure and control method of power inverter main circuit are conducive to quickly demagnetization；It is sustainability, highly reliable, it is high-efficient, it reaches in no power grid, need the field of power and electric power that there is application value.
Description
Technical field
The present invention relates to switched reluctance machines fields, and in particular to the electronic/generating operation mode free switching of one kind is quickly moved back
The strong power converter of switch reluctance motor system of magnetic, automatic charging sustainability.
Background technique
Switched reluctance machines structure simple rigid, it is at low cost without winding, without permanent magnet on rotor, there is wide application
Prospect.
In some application fields, active force had both been needed to be also required to produce electricl energy in due course, by same set of system realize it is electronic/
It generates electricity difunctional, there are certain market prospects, increase benefit.
Currently, there are some knots for improving excitation ability in the power converter system of switch reluctance generator
Structure and method, mainly increase excitation voltage, and then improve exciting current, enable the excitation stage electric current faster on
It rises, excitation time is reduced while to improve exciting current, and then improve power generation fan-out capability.
Either switch reluctance generator or switched reluctance motor will turn off winding confession according to rotor position information
When electric, due to the perceptual property of winding, electric current cannot be reduced to zero at once, enter the variation of subsequent inductance after being easy to appear current hysteresis
Region reduces the efficiency of generator or motor, and conventional method often turns off in advance, but reduces power output capacity,
Can quickly by electric current drop to zero be industry research hotspot.
Switch reluctance generator directly issues direct current, in order to adapt to the demand of different DC power supplies, is often issued
Direct current generate a few road DC power supplies again through different translation circuits, increase the structure and complexity of system.
The switch reluctance generator of separate excitation often uses independent DC power supply for electrical excitation, generally battery at present,
Accumulator electric-quantity is finished, and generator can not work；In addition, for no electric network source area, as switched reluctance motor, also only
Can using this kind of electrical storage device of battery as power supply, electric energy with any with regard to a little less, without sustainability；Self-excitation type is opened
Reluctance generator, field power supply self-excitation are closed, very good solution separate excitation electric quantity of power supply is finished the problem of can not working, but as electricity
There is still a need for independent current sources if motivation.
Summary of the invention
According to above background technique, present invention proposes one kind to take into account power generation/electric operation operating condition, and sustainability mentions
For field power supply, the flexible controllable power converter of switch reluctance motor and its control method quickly to demagnetize is realized.
The technical solution of the present invention is as follows:
A kind of power converter of switch reluctance motor is made of power inverter main circuit, excitation circuit, charging circuit,
Its technical characteristic is that the power inverter main circuit is connect with the excitation circuit and the charging circuit, and is exported, charging
Circuit is connect with excitation circuit；
Power inverter main circuit is made of 2-5 power conversion branch and output capacitor, the 2-5 power conversion
It is connected in parallel between branch；A phase winding of connection and control switch reluctance motor inside each power conversion branch, every phase around
Group is divided into two phase winding branches, and each power conversion branch routes first switch tube, second switch, first diode, second
Diode, third diode, the 4th diode, the 5th diode, first capacitor device, the first phase winding branch, the second phase winding
Branch composition, wherein the first switch tube anode is as power conversion branch, that is, power inverter main circuit input anode
End, first switch tube cathode connect the first diode anode, second diode cathode, the second phase winding branch
One end, the second diode anode connect the first capacitor device cathode and as power conversion branch, that is, power inverter main circuits
Input negative pole end, while also exporting ground terminal, first diode cathode as power conversion branch, that is, power inverter main circuit
The third diode cathode, described first phase winding branch one end are connected, third diode anode connects the second phase winding branch
The road other end, the 4th diode anode, the first phase winding branch other end connect the second switch tube anode, the four or two
Pole pipe cathode, the 5th diode anode, the 5th diode cathode is as power conversion branch, that is, power inverter main circuit
Output cathode end, second switch tube cathode connect first capacitor device anode and as power conversion branch, that is, main electricity of power inverter
Road output negative pole end connects the output capacitor between power inverter main circuit positive and negative end；
Excitation circuit is by the first battery, the second battery, third battery, the first relay, the second relay, third
Relay, the 4th relay, the 5th relay, the 6th relay, the 6th diode composition, first battery positive voltage and institute
First relay one end, second relay one end, the 6th diode anode connection are stated, and is inputted as excitation circuit
Positive terminal, the 6th diode cathode are connect as excitation circuit output cathode end with power inverter main circuit input positive terminal,
First battery terminal negative connect with third relay one end, described 4th relay one end and bears as excitation circuit input
Extremely, the third relay other end connects the first relay other end and second battery positive voltage, the second battery terminal negative
Connect the 4th relay other end and described 5th relay one end, described 6th relay one end, the 5th relay other end
The second relay other end and the third battery positive voltage are connected, third battery terminal negative connects the 6th relay other end simultaneously
It is connect as excitation circuit output negative pole end with power inverter main circuit input negative pole end；
Charging circuit is by third switching tube, the 4th switching tube, transformer, the 7th diode, the 8th diode, the second capacitor
Device, third capacitor, inductance composition, the third switch tube cathode connect power inverter as charging circuit input negative pole end
Main circuit exports ground terminal, and third switchs tube anode and connects transformer first winding one end, the converter first winding other end
Power inverter main circuit output cathode end is connected as charging circuit input positive terminal, transformer secondary winding one end connects institute
The 7th diode anode is stated, the 7th diode cathode connects second capacitor anode and the 4th switch tube anode, the
Four switch tube cathodes connect the 8th diode cathode and described inductance one end, and the inductance other end connects the third capacitor
Anode simultaneously inputs positive terminal as charging circuit output cathode end connection excitation circuit, and third capacitor anode connects the eight or two pole
Tube anode, the second capacitor anode, the transformer secondary winding other end, and as charging circuit output negative pole end connection excitation electricity
Road inputs negative pole end.
A kind of control method of power converter of switch reluctance motor, characterized in that when switched reluctance machines are as electronic
When machine is run, the first relay, the second relay, the 4th relay, the 6th relay, third switching tube, the 4th switching tube begin
It is in an off state eventually, third relay and the 5th relay are in closure on state always；According to switched reluctance machines
Rotor position information, when certain phase winding being needed to be powered, the first switch tube and second of power conversion branch is opened where the phase winding
Pipe closure conducting is closed, energization finishes, and the first switch tube and second switch of the power conversion branch disconnect；
When switched reluctance machines are run as generator, the first relay, the second relay, the 4th relay, the 6th
Relay is in closure on state always, and third relay and the 5th relay are in an off state always；The generator operation phase
Between need the phase winding of work to be divided into excitation and two big stages of power generation according to rotor-position, when the excitation stage, need the phase winding of work
The first switch tube and second switch of the power conversion branch at place are closed conducting, at the end of the excitation stage first switch tube and
Second switch turns off and enters power generating stage；When detecting three battery total electricities of excitation circuit lower than lower limit value,
Charging circuit is devoted oneself to work, i.e., third switching tube and the 4th switching tube are switched according to PWM mode and controlled respectively with certain duty ratio
System adjusts the voltage and current of charging circuit output, by adjusting the duty ratio of third switching tube and the 4th switching tube to meet
Battery charge requirement in excitation circuit, when three battery total electricities to be checked for measuring excitation circuit are higher than upper limit value, third
Switching tube and the shutdown of the 4th switching tube, charging circuit stop working.
Technical effect of the invention mainly has:
(1) same set of power converter circuit device of the invention, as needed, electronic/generating operation mode free switching is fitted
It answers wide.
(2) each phase winding of switched reluctance machines has been divided into two branch windings, is often wound in practice symmetrically not
With in stator salient poles, which when generating operation mode, is conducive to enhancing excitation ability, improves generating capacity, electronic work
When condition, power supply capacity is enhanced.
(3) setting of first capacitor device, so that output end of the invention is three terminals, i.e. power inverter main circuit is defeated
Positive terminal, negative pole end, ground terminal out, first capacitor device are connected with output capacitor, so that three different size of outputs can be obtained
Power supply improves adaptability of the invention.
(4) setting of first capacitor device, in electronic operating condition, after power supply terminates first switch tube and second switch shutdown
When afterflow, the backward voltage of winding increases a first capacitor device both end voltage, quickly drops to so as to accelerate winding current
Zero, otherwise having opposing torque after entering winding inductance decline region reduces the efficiency of switched reluctance machines, and another angle is come
It says, phase winding power supply is opposite at the time of shutdown to be delayed, to improve output of the switched reluctance machines as electric operation when
Ability；It is similarly advantageous in rapidly switching off in generating operation mode, the shutdown moment can be delayed, power generation fan-out capability is increased, generate electricity rank
After section terminates shutdown first switch tube and second switch, the backward voltage of winding is first capacitor device both ends and output capacitor
The sum of both end voltage accelerates winding current and is down to zero.
(5) in generating operation mode, the excitation stage terminates, first switch tube shutdown, if keeping second switch closure conducting
State, the backward voltage as suffered by winding at this time only have first capacitor device to give, and winding current is opposite to remain larger
Value, that is to say, that increase a similar freewheeling period, afterflow terminates second switch and turned off again into power generating stage；Separately
It is also beneficial to outside when first capacitor device both ends are exported with DC load, because freewheeling period i.e. first capacitor device are filled
Electricity generates the stage of DC power supply.
(6) in excitation circuit the serial or parallel connection of three batteries automatic switchover so that same set of circuit has adapted to electricity
The ability that free switching works under dynamic/two kinds of operating conditions of power generation, this is also based on wants as the demand of generator excitation power voltage
It is significantly less than the actual conditions of supply voltage demand when as motor, the present invention is three times of difference.
(7) charging circuit is also simultaneously a DC/DC converter circuit or abbreviation commutator transformer, has isolation features,
Improve reliability and safety；The electric energy of excitation circuit field power supply is charged by charging circuit, improves what the present invention applied
Sustainability, reliability.
Detailed description of the invention
Fig. 1 show power converter of switch reluctance motor circuit structure diagram of the invention.
Fig. 2 show positional relationship and winding inductance variation diagram between switched reluctance machines rotor of the invention.
In Fig. 1: 1, power inverter main circuit, 2, excitation circuit, 3, charging circuit.
Specific embodiment
A kind of power converter of switch reluctance motor, structure chart is as shown in Fig. 1, by power inverter main circuit 1, excitation
Circuit 2, charging circuit 3 form, and power inverter main circuit 1 is connect with excitation circuit 2 and charging circuit 3, and is exported, charging electricity
Road 3 is connect with excitation circuit 2；
The power inverter main circuit 1 of the present embodiment is made of 3 power conversion branches and output capacitor Cm, 3 function
It is connected in parallel between rate transformation branch；A phase winding of connection and control switch reluctance motor inside each power conversion branch,
Every phase winding is divided into two phase winding branches, and each power conversion branch routes first switch tube V1/V2/V3, second switch V4/
V5/V6, first diode D1/D2/D3, the second diode D4/D5/D6, third diode D7/D8/D9, the 4th diode D10/
D11/D12, the 5th diode D13/D14/D15, first capacitor device C1/C2/C3, the first phase winding branch M1/N1/P1, second
Phase winding branch M2/N2/P2 composition, wherein first switch tube V1/V2/V3 anode is as power conversion branch, that is, power conversion
The input positive terminal of device main circuit 1, first switch tube V1/V2/V3 cathode connect first diode D1/D2/D3 anode, the two or two
Pole pipe D4/D5/D6 cathode, second one end phase winding branch M2/N2/P2, the first electricity of the second diode D4/D5/D6 anode connection
Container C1/C2/C3 cathode and as power conversion branch, that is, power inverter main circuit 1 input negative pole end, while also conduct
Power conversion branch, that is, power inverter main circuit 1 exports ground terminal, and first diode D1/D2/D3 cathode connects third diode
D7/D8/D9 cathode, first one end phase winding branch M1/N1/P1, third diode D7/D8/D9 anode connect the second phase winding
The branch M2/N2/P2 other end, the 4th diode D10/D11/D12 anode, the connection of the first phase winding branch M1/N1/P1 other end
Second switch V4/V5/V6 anode, the 4th diode D10/D11/D12 cathode, the 5th diode D13/D14/D15 anode, the
Five diode D13/D14/D15 cathodes are as 1 output cathode end of power conversion branch, that is, power inverter main circuit, second switch
Pipe V4/V5/V6 cathode connects first capacitor device C1/C2/C3 anode and as power conversion branch, that is, power inverter main circuit 1
Output negative pole end connects output capacitor Cm between 1 positive and negative end of power inverter main circuit；
Excitation circuit 2 is by the first battery X1, the second battery X2, third battery X3, the first relay KT1, second
Relay KT2, third relay KT3, the 4th relay KT4, the 5th relay KT5, the 6th relay KT6, the 6th diode
D16 composition, the first battery X1 anode and first one end relay KT1, second one end relay KT2, the 6th diode D16 sun
Pole connection, and positive terminal is inputted as excitation circuit 2, the 6th diode D16 cathode is as 2 output cathode end of excitation circuit and function
Rate inverter main circuit 1 inputs positive terminal connection, the first battery X1 cathode and the one end third relay KT3, the 4th relay
The connection of the one end KT4 simultaneously inputs negative pole end as excitation circuit 2, and it is another that the third relay KT3 other end connects the first relay KT1
End and the second battery X2 anode, the second battery X2 cathode connect the 4th relay KT4 other end and the 5th relay KT5 mono-
End, the 6th one end relay KT6, the 5th relay KT5 other end connect the second relay KT2 other end and third battery X3
Anode, third battery X3 cathode connect the 6th relay KT6 other end and become as 2 output negative pole end of excitation circuit and power
Parallel operation main circuit 1 inputs negative pole end connection；
Charging circuit 3 is by third switching tube V7, the 4th switching tube V8, transformer T, the 7th diode D17, the 8th diode
D18, the second capacitor C4, third capacitor C5, inductance L composition, third switching tube V7 cathode input cathode as charging circuit 3
End connection power inverter main circuit 1 exports ground terminal, and third switching tube V7 anode connects the one end transformer T first winding a, transformation
The device T first winding a other end inputs positive terminal as charging circuit 3 and connects 1 output cathode end of power inverter main circuit, transformation
The one end secondary winding b device T connect the 7th diode D17 anode, the 7th diode D17 cathode connect the second capacitor C4 anode and
4th switching tube V8 anode, the 4th switching tube V8 cathode connect the 8th diode D18 cathode and the one end inductance L, the inductance L other end
It connects third capacitor C5 anode and inputs positive terminal, third capacitor as 3 output cathode end of charging circuit connection excitation circuit 2
Device C5 cathode connects the 8th diode D18 anode, the second capacitor C4 cathode, the transformer T secondary winding b other end, and conduct
3 output negative pole end of charging circuit connects excitation circuit 2 and inputs negative pole end.
The control method of the power converter of switch reluctance motor of the present embodiment, when switched reluctance machines are transported as motor
When row, the first relay KT1, the second relay KT2, the 4th relay KT4, the 6th relay KT6, third switching tube V7,
Four switching tube V8 are in an off state always, and third relay KT3 and the 5th relay KT5 are in closure on state always；
According to the rotor position information of switched reluctance machines, when certain phase winding being needed to be powered, power conversion branch where the phase winding
First switch tube V1/V2/V3 and second switch V4/V5/V6 closure conducting, energization finish, and the first of the power conversion branch
Switching tube V1/V2/V3 and second switch V4/V5/V6 is disconnected；
Specifically, according to switched reluctance machines rotor relative position information as shown in Fig. 2, when detecting certain phase winding
When positional relationship is near 0 point of coordinate between the rotor of place, which needs to be powered, it is assumed that is M phase winding, i.e. M1 and M2
The M phase winding of composition, first switch tube V1 and second switch V4 closure conducting, the first battery X1 of series connection, second
Battery X2, third battery X3 electric energy via being passed through again after being divided into two parallel branch i.e. D1-M1 and M2-D10 after D16, V1
It crosses V4-C1 and returns to three battery X1/X2/X3 formation current supply circuits；As shown in Fig. 2, in θ1And θ2Between i.e. winding inductance most
Small LminSection needs to be closed V1, V4 according to load and control, in θ3And θ4Between θαLeft and right is the maximum L of winding inductancemaxArea
Section shutdown V1, V4, otherwise winding current enters opposing torque area (θ4Electric efficiency is reduced later)；Next according to rotor-position
Information, next phase winding or N phase or P phase enter work, then control model of corresponding power transformation branch is identical where it；
After each power conversion branch stops working, by taking M phase winding as an example, the energy storage in M phase winding is via circuit D4-
Two capacitors transfer of the M2-D7-M1-D13-Cm-C1-D4 into the circuit.
When switched reluctance machines are run as generator, the first relay KT1, the second relay KT2, the 4th relay
KT4, the 6th relay KT6 are in closure on state always, and third relay KT3 and the 5th relay KT5 are in disconnected always
Open state；The phase winding of work is needed to be divided into excitation and two big stages of power generation, excitation stage according to rotor-position during generator operation
When, need the first switch tube V1/V2/V3 of the power conversion branch where the phase winding of work and second switch V4/V5/V6 to close
Conducting is closed, first switch tube V1/V2/V3 and second switch V4/V5/V6 is turned off and entered power generation rank at the end of the excitation stage
Section；When detecting each battery total electricity of excitation circuit 2 lower than lower limit value, charging circuit 3 is devoted oneself to work, i.e., third is opened
Pipe V7 and the 4th switching tube V8 is closed respectively with certain duty ratio, according to PWM mode switch control, by adjusting third switching tube
The duty ratio of V7 and the 4th switching tube V8 adjust the voltage and current that charging circuit 3 exports, are respectively stored with meeting in excitation circuit 2
Battery charge requirement, when each battery total capacity to be checked for measuring excitation circuit 2 is higher than upper limit value, third switching tube V7 and the
Four switching tube V8 shutdown, charging circuit stop working；
Specific work process are as follows: the rotor positional relationship where detecting that certain phase winding is assumed to be M phase winding reach as
Attached θ shown in Fig. 23Behind position, first switch tube V1 and second switch V4 closure conducting is controlled, into excitation stage, path
For circuit identical with motor energization operating status behind 2 output cathode end of excitation circuit, 2 output negative pole of excitation circuit is returned again to
End reaches θ according to the needs for giving relevant parameter in operation4Behind position or so, the excitation stage terminates to turn off first switch
Pipe V1 and second switch V4, into power generating stage, energy storage in M1 and M2 along the circuit M2-D7-M1-D13-Cm-C1-D4 to
Two capacitor chargings in circuit, while exporting to power load, while to ensure reach θ5M phase winding when the position of left and right
Electric current begins to decline and in θ6Left-right position drops to zero, prevents from entering θ2-θ3The forward torque area in section reduces generating efficiency；
Terminate when the excitation stage, only turns off first switch tube V1, when second switch V4 continues to remain closed conducting, due to
Only first capacitor device C1 provides backward voltage, and opposite power generating stage winding is by first capacitor device C1 and output capacitor Cm electricity
The case where the sum of pressure, electric current opposite will can maintain or rise or slow downward trend, this is freewheeling period.
Either under motor working condition or generator operating condition, when the battery total electricity mistake for detecting excitation circuit 2
Low, when specially detecting battery voltage and electric current lower than lower limit value, while capacitor Cm and C1 both ends total voltage is higher than and fills
Circuit 3 can job requirement voltage when, charging circuit 3 start to work, i.e., charge to the batteries of excitation circuit, third is opened
It closes pipe V7 and the 4th switching tube V8 and respectively presses the work of PWM control mode；After third switching tube V7 closure conducting, transformer T is primary
The linearly increasing energy storage of electric current of side winding a, after third switching tube V7 shutdown, the electric current of transformer T first side winding a is cut off,
Its energy storage is discharged by secondary side winding b via the 7th diode D17, and is partially converted to the energy storage of the second capacitor C4, when
When the 4th switching tube V8 closure conducting, exported from the second capacitor C4 and via the electric energy of the 4th switching tube V8 through inductance L, the
When four switching tube V8 are turned off, due to the effect of inductance L, output end current is uninterrupted, and continues via the 8th diode D18 afterflow
Output；
If the PWM duty cycle of third switching tube V7 and the 4th switching tube V8 are respectively α1And α2, transformer T first side winding a
The ratio between the number of turns and secondary side winding b the number of turns are Y (winding b the number of turns is divided by winding a the number of turns value), then 3 output voltage UC5 of charging circuit
With the relationship of input voltage UCR are as follows:
When motor working condition and generator operating condition not due to the series-parallel connection type of three batteries of excitation circuit 2
Together, voltage and current needed for charging is also different, and two switching tube duty ratios of charging circuit 3 are adjusted according to both different situations
To adjust output voltage and current range with meet demand.
Each switching tube of the present embodiment uses the full-control type power electronic switching device of IGBT or MOSFET.
Claims (2)
1. a kind of power converter of switch reluctance motor is made of power inverter main circuit, excitation circuit, charging circuit,
Technical characteristic is that the power inverter main circuit is connect with the excitation circuit and the charging circuit, and is exported, charging electricity
Road is connect with excitation circuit；
Power inverter main circuit is made of 2-5 power conversion branch and output capacitor, the 2-5 power conversion branch
Between be connected in parallel；A phase winding of connection and control switch reluctance motor inside each power conversion branch, every phase winding point
For two phase winding branches, each power conversion branch routes first switch tube, second switch, first diode, the two or two pole
Pipe, third diode, the 4th diode, the 5th diode, first capacitor device, the first phase winding branch, the second phase winding branch
Composition, wherein the first switch tube anode is as power conversion branch, that is, power inverter main circuit input positive terminal, and the
One switch tube cathode connects the first diode anode, second diode cathode, described second phase winding branch one end,
Second diode anode connects the first capacitor device cathode and as the defeated of the i.e. power inverter main circuit of power conversion branch
Enter negative pole end, while also exporting ground terminal, the connection of first diode cathode as power conversion branch, that is, power inverter main circuit
The third diode cathode, described first phase winding branch one end, it is another that third diode anode connects the second phase winding branch
One end, the 4th diode anode, the first phase winding branch other end connect the second switch tube anode, the 4th diode
Cathode, the 5th diode anode, the 5th diode cathode is as power conversion branch, that is, power inverter main circuit output
Positive terminal, it is positive and defeated as power conversion branch, that is, power inverter main circuit that second switch tube cathode connects first capacitor device
Negative pole end out connects the output capacitor between power inverter main circuit positive and negative end；
Excitation circuit is by the first battery, the second battery, third battery, the first relay, the second relay, third relay
Device, the 4th relay, the 5th relay, the 6th relay, the 6th diode composition, first battery positive voltage and described the
One relay one end, second relay one end, the 6th diode anode connection, and anode is inputted as excitation circuit
End, the 6th diode cathode are connect as excitation circuit output cathode end with power inverter main circuit input positive terminal, and first
Battery terminal negative connect with third relay one end, described 4th relay one end and inputs cathode as excitation circuit
End, the third relay other end connect the first relay other end and second battery positive voltage, and the second battery terminal negative connects
The 4th relay other end and described 5th relay one end, described 6th relay one end are connect, the 5th relay other end connects
The second relay other end and the third battery positive voltage are connect, third battery terminal negative connects the 6th relay other end and makees
Negative pole end is inputted with power inverter main circuit for excitation circuit output negative pole end to connect；
Charging circuit by third switching tube, the 4th switching tube, transformer, the 7th diode, the 8th diode, the second capacitor,
Third capacitor, inductance composition, the third switch tube cathode connect power inverter master as charging circuit input negative pole end
Circuit output ground terminal, third switch tube anode and connect transformer first winding one end, and the converter first winding other end is made
For charging circuit input positive terminal connect power inverter main circuit output cathode end, transformer secondary winding one end connection described in
7th diode anode, the 7th diode cathode connection second capacitor anode and the 4th switch tube anode, the 4th
It switchs tube cathode and connects the 8th diode cathode and described inductance one end, the inductance other end is connecting the third capacitor just
Pole simultaneously inputs positive terminal as charging circuit output cathode end connection excitation circuit, and third capacitor anode connects the 8th diode
Anode, the second capacitor anode, the transformer secondary winding other end, and excitation circuit is connected as charging circuit output negative pole end
Input negative pole end.
2. a kind of control method of power converter of switch reluctance motor according to claim 1, technical characteristic is:
When switched reluctance machines are as motor running, the first relay, the second relay, the 4th relay, the 6th relay
Device, third switching tube, the 4th switching tube are in an off state always, and third relay and the 5th relay are in closure always and lead
Logical state；According to the rotor position information of switched reluctance machines, when certain phase winding being needed to be powered, power conversion where the phase winding
The first switch tube and second switch of branch are closed conducting, and energization finishes, the first switch tube of the power conversion branch and the
Two switching tubes disconnect；
When switched reluctance machines are run as generator, the first relay, the second relay, the 4th relay, the 6th relay
Device is in closure on state always, and third relay and the 5th relay are in an off state always；Root during generator operation
The phase winding that work is needed according to rotor-position includes excitation and two big stages of power generation, when the excitation stage, where the phase winding for needing work
Power conversion branch first switch tube and second switch closure conducting, first switch tube and second at the end of the excitation stage
Switching tube turns off and enters power generating stage, but controls needs according to system, when need phase winding electric current before power generating stage starts
When continuing to rise, terminate only to turn off first switch tube, second switch continues to keep closing before power generating stage starts in the excitation stage
Conducting is closed, that is, increases this freewheeling period；
When detecting three battery total electricities of excitation circuit lower than lower limit value, charging circuit is devoted oneself to work, i.e., third is opened
Pipe and the 4th switching tube are closed respectively with certain duty ratio, according to PWM mode switch control, by adjusting third switching tube and the
The duty ratio of four switching tubes adjusts the voltage and current of charging circuit output, to meet battery charge requirement in excitation circuit,
When three battery total electricities to be checked for measuring excitation circuit are higher than upper limit value, third switching tube and the shutdown of the 4th switching tube are filled
Circuit stops working.
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| CN201710572551.9A CN107196576B (en) | 2017-07-06 | 2017-07-06 | A kind of power converter of switch reluctance motor and its control method |
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| CN201710572551.9A CN107196576B (en) | 2017-07-06 | 2017-07-06 | A kind of power converter of switch reluctance motor and its control method |
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| CN107196576B true CN107196576B (en) | 2019-09-10 |
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| CN108429498B (en) * | 2018-03-21 | 2019-07-12 | 中国计量大学 | A kind of switch reluctance generator converter system |
| CN108429497B (en) * | 2018-03-21 | 2019-09-06 | 中国计量大学 | A kind of switch reluctance generator, which is improved oneself, encourages high pressure converter system |
| CN108429499B (en) * | 2018-03-21 | 2019-09-10 | 中国计量大学 | Self-excitation High speed SRM power converter system |
| CN108448967B (en) * | 2018-03-21 | 2019-07-30 | 中国计量大学 | A kind of switched reluctance machines converter system |
| CN108667384B (en) * | 2018-06-06 | 2019-09-06 | 中国计量大学 | Self-charging Qiang Lishuan transformation double winding high-gain alternating-current switch reluctance motor converter |
| CN110341503B (en) * | 2019-06-03 | 2020-09-01 | 中国矿业大学 | Integrated switched reluctance motor driving system of plug-in hybrid electric vehicle |
| CN110212827B (en) * | 2019-06-12 | 2021-02-12 | 中国计量大学 | Converter system of switched reluctance generator |
| CN110429880B (en) * | 2019-08-20 | 2020-11-27 | 中国计量大学 | Double-excitation double-fed mutual charging high-speed switch reluctance generator current conversion system |
| CN110784137B (en) * | 2019-10-17 | 2021-03-26 | 中国计量大学 | Boost double-fed switch reluctance generator current transformation system |
| CN116404942B (en) * | 2023-02-06 | 2023-08-29 | 广东工业大学 | Variable structure driving circuit, device and control method for multiphase switch reluctance motor |
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