CN104617729B - A kind of vscf generator - Google Patents
A kind of vscf generator Download PDFInfo
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- CN104617729B CN104617729B CN201510061177.7A CN201510061177A CN104617729B CN 104617729 B CN104617729 B CN 104617729B CN 201510061177 A CN201510061177 A CN 201510061177A CN 104617729 B CN104617729 B CN 104617729B
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Abstract
The present invention relates to a kind of generator, more particularly to a kind of input speed is variable, the constant generator of output current frequency, including engine block, the engine block top is provided with exciter, the engine block includes generator amature, generator magnetic pole, generator stator bar, generator stator lead-out wire, alternator shaft and generator magnetic pole lead-out wire, the exciter includes exciter rotatable parts, armature of exciter, exciter magnetic pole, exciter field leads and exciter rotating shaft, the exciter rotating shaft is connected with alternator shaft, the output lead of the armature of exciter is connected with generator magnetic pole lead, the excitation input of the exciter magnetic pole is power frequency square wave current.The invention has the advantages that rotary speed of generator group can adjust at any time according to prime mover optimized rotating speed, and keep the electric current of constant frequency to export, maximize energy utilization rate, while generator has the advantages of brushless excitation.
Description
Technical field
The present invention relates to a kind of generator, more particularly to the generating that a kind of input speed is variable, output current frequency is constant
Machine.
Background technology
Generation current machine uses DC excitation electric current, and it, which exports constant frequency electric current, needs constant rotating speed, that is, needs
Run under synchronous rotational speed.But the rotating speed that prime mover will be optimal under different input conditions when efficient state is run is not permanent
Fixed, the power frequency for usually sending generator is constant, and prime mover is also run under constant rotational speed, such using energy source
Rate cannot maximize, and cause certain waste；
And universal excitation unit output is DC current, and variable speed constant frequency motor excitation needs to use square wave electric
Stream, thus current excitation unit can not meet variable speed constant frequency motor excitation needs.
The content of the invention
In order to overcome current rotor to be transported using salient-pole structure generator output constant frequency electric current under synchronous rotational speed
Row and make prime mover must invariablenes turning speed the shortcomings that, the invention provides one kind to be needed with output variable speed constant frequency motor excitation
Square wave current, disclosure satisfy that the generator that can meet the output of constant frequency electric current under asynchronous rotating speed, generating unit speed can be according to
Prime mover has to be run under the rotating speed of optimum efficiency, maximizes using energy source.
The technical solution adopted for the present invention to solve the technical problems is：A kind of vscf generator, including generator
Body, the engine block top are provided with exciter, and the engine block includes generator amature, generator magnetic pole, hair
Stator winding conductor bars in electrical machines, generator stator lead-out wire, alternator shaft and generator magnetic pole lead-out wire, the exciter include excitation
Machine rotatable parts, armature of exciter, exciter magnetic pole, exciter field leads and exciter rotating shaft, the exciter rotating shaft with
Alternator shaft is connected, and the output lead of the armature of exciter is connected with generator magnetic pole lead, the exciter magnetic pole
Excitation input is power frequency square wave current.
Preferably, the engine block is externally provided with upper spider and lower bearing bracket, and the exciter is connected with upper spider.
Preferably, the logarithm of the exciter magnetic pole is identical with the logarithm of generator magnetic pole.
Preferably, the armature of exciter is directly connected to generator magnetic pole lead by wire.
Preferably, excitation additional device, the excitation additional are connected between the exciter and pole coil of generator
Device includes two parallel branches, has two series thyristors, respectively an anode IGCT and a moon on each branch road
Pole IGCT, two anode IGCTs share an anode, and two negative electrode IGCTs share a negative electrode, two common-anode crystalline substance locks
The anode of pipe contact connection excitation unit output, the negative electrode of two common cathode IGCT contact connection excitation unit output, two
Contact is drawn between the IGCT of individual branch road, respectively the both ends of connection dynamo field coil, electric current in dynamo field coil
Direction conversion is realized by each turn on thyristors, shut-off.
Preferably, two common-anode IGCTs are respectively first anode IGCT and second plate IGCT, two common cathodes
Pole IGCT is respectively the first negative electrode IGCT and the second negative electrode IGCT.
Preferably, between pole coil of generator one end connection first anode IGCT and the first negative electrode IGCT,
The pole coil of generator other end is connected between second plate IGCT and the second negative electrode IGCT.
Preferably, the generator also includes excitation rectifier device, and the excitation rectifier device includes being connected to three-phase alternating current
Two groups of IGCTs on power supply, every group of IGCT quantity are 6, and 6 IGCTs form three-phase full-wave full-controlled rectifier bridge, wherein one
The negative pole that the positive pole of group three-phase full-wave full-controlled rectifier bridge output exports with another group of three-phase full-wave full-controlled rectifier bridge respectively with negative pole
Two output ends to connect with positive pole as fairing.
Preferably, the rule alternate conduction shut-off that two groups of three-phase full-wave full-controlled rectifier bridges are needed by variable speed constant frequency motor, it is whole
The square wave current that bridge exports corresponding rule is flowed, adapts to variable speed constant frequency motor excitation needs.
Preferably, fairing exports DC current when using only one group of rectifier bridge, can meet common synchronization motor
Excitation demand.
Only wire is directly connected between the armature of exciter and generator magnetic pole lead of the present invention, without using brush, nothing
Other electrical equipments, simplify structure, save cost.
The present invention sets direct-coupling exciter, the exciter fixed magnetic pole logarithm and power generator rotor magnetic pole on generator top
Logarithm is identical, and exciter magnetic pole is powered using power frequency square wave current, and armature of exciter is powered directly to generator amature.Work as rotation
When part is in synchronous rotational speed, armature of exciter output is that the input current of generator magnetic pole is direct current, and stator bar receives work
Frequency magnetic pole and magnetic field is changed, stator output power current.When rotatable parts are not with synchronous rotational speed, armature of exciter output will be by
Power frequency, turn frequency synthesis square wave current, this square wave current is carried on power generator rotor magnetic pole so that pole polarity follow current
Changing rule changes, and pole polarity changes rule and is superimposed with turning frequency, so that stator bar receives magnetic field conversion frequency and protected
It is constant to hold power frequency, exports power current.
The present invention adds excitation additional device also between exciter and engine block, and it is by common excitation unit
Output DC current is changed into the square wave current of variable speed constant frequency motor excitation needs.Common excitation unit is using the additional of the present invention
The excitation needs of variable speed constant frequency motor can be met after device.
Excitation rectifier device is added simultaneously, by two groups of thyristor groups into every group of 6 IGCT forms three-phase full-wave and controlled entirely
Rectifier bridge, two groups of rectifier bridge output opposed polarity contacts connect, and as two output ends, rule on demand is used alternatingly two
Rectifier bridge, the square-wave excitation electric current that can be needed with output variable speed constant frequency motor；When using only one of which thyristor rectifier bridge
Export as DC current, common synchronization motor excitation demand can be met.
The invention has the advantages that rotary speed of generator group can adjust at any time according to prime mover optimized rotating speed, and keep
The electric current output of constant frequency, maximizes energy utilization rate, while generator has the advantages of brushless excitation.
Brief description of the drawings
Fig. 1 is the structural representation of invention；
Fig. 2 is each parameter of generator changes over time situation during synchronous rotational speed in the present invention；
Each parameter of generator changes over time situation when Fig. 3 is less than synchronous rotational speed for rotating speed in the present invention；
Each parameter of generator changes over time situation when Fig. 4 is higher than synchronous rotational speed for rotating speed in the present invention；
Fig. 5 is the theory diagram of excitation additional device in the present invention；
Fig. 6 is the theory diagram of excitation rectifier device in the present invention；
Fig. 7 is independent one group of turn on thyristors rectification figure of excitation rectifier device in the present invention；
Fig. 8 is two groups of IGCT alternate conduction rectification figures of excitation rectifier device in the present invention；
1. generator magnetic pole lead in figure, 2. exciter rotatable parts, 3. armature of exciter, 4. exciter field leads,
5. exciter magnetic pole, 6. exciter rotating shafts, 7. upper spiders, 8. generator amatures, 9. generator magnetic poles, 10. generator unit stator lines
Rod, 11. generator stator lead-out wires, 12. lower bearing brackets, 13. alternator shafts, 21. first anode IGCTs, 22. second negative electrodes
IGCT, 23. second plate IGCTs, 24. first negative electrode IGCTs, 25. pole coil of generator.
Embodiment
The invention will now be described in further detail with reference to the accompanying drawings, but is not the limit to the scope of the present invention
System.
Shown in Fig. 1, a kind of vscf generator, including engine block, engine block top are provided with exciter, hair
Motor body includes generator amature 8, generator magnetic pole 9, generator stator bar 10, generator stator lead-out wire 11, generating
Machine rotating shaft 13 and generator magnetic pole lead-out wire 1, exciter include exciter rotatable parts 2, armature of exciter 3, exciter magnetic pole
5th, exciter field leads 4 and exciter rotating shaft 6, exciter rotating shaft 6 are connected with alternator shaft 13, armature of exciter 3 it is defeated
Go out lead to be connected with generator magnetic pole lead 1, the excitation input of exciter magnetic pole 5 is power frequency square wave current.Outside engine block
Provided with upper spider 7 and lower bearing bracket 12, exciter is connected with upper spider 7.The logarithm of exciter magnetic pole 5 and pair of generator magnetic pole 9
Number is identical.Armature of exciter 3 is directly connected to generator magnetic pole lead 1 by wire.
Exciter rotating shaft 6 is directly connected to alternator shaft 13 in the present invention, exciter rotatable parts 2 is turned with generator
Son 8 has identical rotating speed.Exciter magnetic pole 5 has identical quantity with generator magnetic pole 9.The output of armature of exciter 3 is drawn
Line is directly connected with generator magnetic pole lead 1, and exciting current is provided for generator magnetic pole 9.Lower bearing bracket 12 turns with restocking 7 for unit
Dynamic part provides supporting, and exciter stator is also secured on upper spider 7 including exciter magnetic pole 5, passes through exciter field leads 4
" exciter input current " shown in Fig. 2 is passed through to exciter magnetic pole 5（This waveform is identical with Fig. 3, Fig. 4）The exciting current of waveform,
When unit has synchronous rotational speed, armature of exciter 3 is by the constant electric current of outbound course, i.e., such as Fig. 2 " exciter output current "
Shown unidirectional current, now if Fig. 2 " corresponding to stator bar magnetic field convert " frequency shown in curve is power frequency, generator is fixed
Son output is power current.When generating unit speed is less than synchronous rotational speed, such as Fig. 3 " conversion of armature of exciter coil side " curve institute
Show, the conversion frequency of armature of exciter coil side is less than exciter input current frequency（That is exciter pole polarity conversion frequency
Rate）, now gained armature of exciter electric current waveform, generator amature rotating speed and excitation as shown in Fig. 3 " exciter output current "
Machine rotor rotating speed is identical, i.e. " reversal of magnetism of generator amature entity " and " conversion of armature of exciter coil side " curve one in Fig. 3
Cause, thus by " exciter output current " curve and the mutually compound obtained " stator of " reversal of magnetism of generator amature entity " curve
Magnetic field corresponding to bar converts " curve has work frequency, thus generator unit stator output is power current.Fig. 4, which is shown, to be turned
Speed is higher than the situation of synchronous rotational speed, and conversion process exports power current principle when being less than synchronous rotational speed with generating unit speed is identical.
Fig. 2-4 respectively illustrates unit and is in synchronous rotational speed, generating unit speed less than synchronous rotational speed, generating unit speed higher than synchronous
Under speed conditions, generator keep power current output, from exciter input current waveform, excitation armature output current wave,
Generator rotor field rule of conversion, the process to generator unit stator electric current output.
As shown in figure 5, being connected with excitation additional device between the exciter and pole coil of generator, the excitation is attached
Feeder apparatus includes two parallel branches, there is two series thyristors on each branch road, a respectively anode IGCT and one
Negative electrode IGCT, two anode IGCTs share an anode, and two negative electrode IGCTs share a negative electrode, two common-anode crystalline substances
The anode of brake tube contact connection excitation unit output, the negative electrode of two common cathode IGCT contact connection excitation unit output,
Contact is drawn between the IGCT of two branch roads, connects the both ends of dynamo field coil 25, dynamo field coil 25 respectively
The middle sense of current realizes conversion by each turn on thyristors, shut-off.Two common-anode IGCTs are respectively first anode IGCT
21 and second plate IGCT 23, two common cathode IGCTs be respectively the first negative electrode IGCT 24 and the second negative electrode IGCT
22.The one end of pole coil of generator 25 is connected between first anode IGCT 21 and the first negative electrode IGCT 24, generator magnetic pole
The other end of coil 25 is connected between second plate IGCT 23 and the second negative electrode IGCT 22.
The present invention in use, first anode IGCT 1, the common-anode lead contact of second plate IGCT 3 are labeled as "+",
Second negative electrode IGCT 2, the common cathode lead contact of the first negative electrode IGCT 4 are labeled as "-", and first anode IGCT 1, first is cloudy
Lead-out wire contact is labeled as " A " between pole IGCT 4, and lead-out wire connects between second plate IGCT 3, the second negative electrode IGCT 2
Point is labeled as " B ", and "+" connects the anode of excitation unit output, and "-" connects the negative electrode of excitation unit output, and sending and receiving are electric respectively by " A ", " B "
The both ends of machine pole coil 5.Under second plate IGCT 3, the off state of the first negative electrode IGCT 4, first anode IGCT 1,
Triggering and conducting, exciter current of generator are flowed to " B " second negative electrode IGCT 2 by " A " through pole coil of generator 5 simultaneously.First
Anode IGCT 1, the second negative electrode IGCT 2 are simultaneously turned off under state, and second plate IGCT 3, the first negative electrode IGCT 4 trigger
Conducting, motor energization current are flowed to " A " by " B " through pole coil of generator 5.First anode IGCT 1, the second negative electrode IGCT
2 be one group, and second plate IGCT 3, the first negative electrode IGCT 4 are one group, the on or off action one of every group of IGCT
Cause, the action between two groups is opposite：That is another group turns at once after one group of shut-off.Two groups of IGCTs are by motor excitation requirement rule
Alternately shut-off, conducting, the pole coil for variable speed constant frequency motor provide square wave current.One group long phase conducting, another group leader's phase close
It can be the pole coil power supply of synchronous operation common electric machine when disconnected.
As shown in figs 6-8, the generator also includes excitation rectifier device, and the excitation rectifier device includes being connected to three-phase
Two groups of IGCTs in AC power, every group of IGCT quantity are 6, and 6 IGCTs form three-phase full-wave full-controlled rectifier bridge, its
In the output of one group of three-phase full-wave full-controlled rectifier bridge positive pole and negative pole respectively with another group of three-phase full-wave full-controlled rectifier bridge output
Two output ends that negative pole connects with positive pole as fairing.Two groups of three-phase full-wave full-controlled rectifier bridges are needed by variable speed constant frequency motor
The rule alternate conduction shut-off wanted, rectifier bridge export the square wave current of corresponding rule, adapt to variable speed constant frequency motor excitation needs.When
DC current is exported using only fairing during one group of rectifier bridge, common synchronization motor excitation demand can be met.
As shown in fig. 6, IGCT 1-6 is one group of IGCT（M groups）, the common cathode of IGCT 1,3,5, IGCT 2,4,6 is common
Anode, it is "+" pole to form Q, and P is the three-phase full-wave all controlled rectifier circuit of "-" pole.IGCT 1 ' -6 ' is one group of IGCT（N
Group）, the common cathode of IGCT 1 ', 3 ', 5 ', the common-anode of IGCT 2 ', 4 ', 6 ', it is "+" pole to form P, and Q is the three-phase full-wave of "-" pole
All controlled rectifier circuit.
In Fig. 7,（1）For three-phase alternating-current supply figure,（M）For M groups turn on thyristors sequentially,（2）For using only the brilliant lock of M groups
Fairing output pattern during tube rectifying circuit,（N）For N groups turn on thyristors sequentially,（3）To be whole using only N group IGCTs
Fairing output pattern during current circuit.It can meet common synchronization motor excitation needs during using only mono- group of IGCT of M or N
In Fig. 8,（1）For three-phase alternating-current supply figure,（M）For M groups turn on thyristors sequentially,（N）For N group turn on thyristors
Sequentially,（M）With（N）Middle shaded side represents the IGCT shut-off at this of corresponding period, and crystalline substance lock at this of corresponding period is represented at non-shadow
Pipe turns on,（2）To correspond to（M）（N）Fairing output pattern under on, off rule.Pass through adjustment（M）With（N）Two groups
On, off rule, obtain the U of corresponding ruleQPSquare wave exports, and meets variable speed constant frequency motor excitation demand.
The excitation rectifier device of the present invention can export square wave current or unidirectional current as needed, meet variable speed constant frequency electricity
Machine or synchronous machinery excitation are needed, and the excitation rectifier device of exciting current can be provided for variable speed constant frequency motor.
Claims (1)
1. a kind of vscf generator, including engine block, it is characterised in that：The engine block top is provided with excitation
Machine, the engine block include generator amature, generator magnetic pole, generator stator bar, generator stator lead-out wire, hair
Machine shaft and generator magnetic pole lead-out wire, the exciter include exciter rotatable parts, armature of exciter, exciter magnetic
Pole, exciter field leads and exciter rotating shaft, the exciter rotating shaft are connected with alternator shaft, the armature of exciter
Output lead is connected with generator magnetic pole lead, and the input of the excitation of the exciter magnetic pole is power frequency square wave current, the excitation
The logarithm of machine magnetic pole is identical with the logarithm of generator magnetic pole；The engine block is externally provided with upper spider and lower bearing bracket, described to encourage
Magnetomechanical is connected with upper spider；The armature of exciter is directly connected to generator magnetic pole lead by wire；The exciter with
Excitation additional device is connected between excitation unit, the excitation additional device includes two parallel branches, had on each branch road
Two series thyristors, respectively an anode IGCT and a negative electrode IGCT, two anode IGCTs share a sun
Pole, the shared negative electrode of two negative electrode IGCTs, the anode of two common-anode IGCT contacts connection excitation unit output, two
The negative electrode of common cathode IGCT contact connection excitation unit output, contact is drawn between the IGCT of two branch roads, is connected respectively
The both ends of exciter pole coil are connect, the sense of current realizes conversion by each turn on thyristors, shut-off in exciter pole coil；
Two common-anode IGCTs are respectively first anode IGCT and second plate IGCT, and two common cathode IGCTs are respectively
One negative electrode IGCT and the second negative electrode IGCT；Exciter pole coil one end connection first anode IGCT and first the moon
Between the IGCT of pole, between exciter pole coil other end connection second plate IGCT and the second negative electrode IGCT；The hair
Motor also includes excitation rectifier device, and the excitation rectifier device includes two groups of IGCTs being connected on three-phase alternating-current supply,
Every group of IGCT quantity is 6, and 6 IGCTs form three-phase full-wave full-controlled rectifier bridge, one of which three-phase full-wave full-controlled rectifier
The positive pole of bridge output connects as rectification with negative pole of the negative pole respectively with another group of three-phase full-wave full-controlled rectifier bridge output with positive pole
Two output ends of device；The rule alternate conduction shut-off that two groups of three-phase full-wave full-controlled rectifier bridges are needed by variable speed constant frequency motor,
Rectifier bridge exports the square wave current of corresponding rule, adapts to variable speed constant frequency motor excitation needs；It is whole when using only one group of rectifier bridge
Device output DC current is flowed, common synchronization motor excitation demand can be met.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510061177.7A CN104617729B (en) | 2015-02-06 | 2015-02-06 | A kind of vscf generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510061177.7A CN104617729B (en) | 2015-02-06 | 2015-02-06 | A kind of vscf generator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104617729A CN104617729A (en) | 2015-05-13 |
| CN104617729B true CN104617729B (en) | 2017-11-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201510061177.7A Active CN104617729B (en) | 2015-02-06 | 2015-02-06 | A kind of vscf generator |
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Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2195157Y (en) * | 1994-06-02 | 1995-04-19 | 吴积善 | AC excitation synchronous generator |
| CN102738985A (en) * | 2012-07-06 | 2012-10-17 | 王光顺 | Direct grid-tied variable-speed constant-frequency generator |
| CN102797637A (en) * | 2012-09-04 | 2012-11-28 | 郁百超 | Wind-driven generator with micro-power consumption |
| CN202957731U (en) * | 2012-12-13 | 2013-05-29 | 邵阳市电机厂有限公司 | Brushless excitation hydraulic generator |
| CN204465291U (en) * | 2015-02-06 | 2015-07-08 | 浙江富春江水电设备有限公司 | A kind of vscf generator |
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Address after: 310012 Hongqi South Road, the Fuchun River Town, Tonglu County, Hangzhou City, Zhejiang Province, No. 99 Patentee after: ZHEJIANG FUCHUNJIANG HYDROELECTRIC EQUIPMENT CO., LTD. Address before: 310012 Zan Yu mansion, No. 702, gudun Road, Hangzhou, Zhejiang Province, 9 Patentee before: ZHEJIANG FUCHUNJIANG HYDROELECTRIC EQUIPMENT CO., LTD. |