CN107733306A - A kind of generator H bridges excitation unit and method suitable for aviation power system - Google Patents
A kind of generator H bridges excitation unit and method suitable for aviation power system Download PDFInfo
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- CN107733306A CN107733306A CN201710981076.0A CN201710981076A CN107733306A CN 107733306 A CN107733306 A CN 107733306A CN 201710981076 A CN201710981076 A CN 201710981076A CN 107733306 A CN107733306 A CN 107733306A
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- tube
- exciting current
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Classifications
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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
- H02P9/00—Arrangements for controlling electric generators for the purpose of obtaining a desired output
- H02P9/14—Arrangements for controlling electric generators for the purpose of obtaining a desired output by variation of field
- H02P9/26—Arrangements for controlling electric generators for the purpose of obtaining a desired output by variation of field using discharge tubes or semiconductor devices
- H02P9/30—Arrangements for controlling electric generators for the purpose of obtaining a desired output by variation of field using discharge tubes or semiconductor devices using semiconductor devices
-
- 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
- H02P2101/00—Special adaptation of control arrangements for generators
- H02P2101/30—Special adaptation of control arrangements for generators for aircraft
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Eletrric Generators (AREA)
Abstract
The present invention provides one kind generator excitation unit and method suitable for aviation power system, the excitation circuit of H bridge power model modes is formed using four power tube devices, driving control signal can carry out independent break-make control to four power tube devices respectively；Turned on by two groups of timesharing to pipe, realize the transformation in the exciting current direction on generator excitation winding.Under excited state, the drive control of diagonal power tube uses overlapping conducting mode in H bridges, and the time caused by exciting current is the time that certain a pair diagonal power tubes simultaneously turn on；Under deexcitation magnetic state, afterflow and the demagnetization of energized circuit are realized by the single tube conducting of down tube in H bridges and the device property of power tube.The present invention connects characteristic fast, that shut-off is slow for single power tube and made up, when the switching frequency of pulsewidth modulation is improved by the order of magnitude, field circuit control accuracy is effectively raised, so as to reduce exciting current pulsation rate, and then improves generator end out-put supply quality.
Description
Technical field
The invention belongs to generator excitation Qu Donglingyu, is related to a kind of generator H bridges suitable for aviation power system and encourages
Magnetic device and method.
Background technology
For aircraft system, its power-supply system bears the function of supplying power of whole aircraft, power, the product of power-supply system
Matter etc. is most important.High power density, the power supply of high-quality can not only provide excellent electric power energy for electrical equipment on machine,
Can also space, weight on saving machine, be the final goal that aeronautical technology personnel defer in the design.
Aviation power system is typically by product forms such as generator, generator voltage controller and current transformers.Its
Middle voltage regulator mainly completes the regulation to exciter current of generator, so as to meet aviation power supply demand by generator end output
Electric power energy.
For above-mentioned phenomenon, the way of aviation power system is to use monocrystal tubular type voltage regulator at present, by changing
Become the exciting current that conduction ratio carrys out regulator generator, as shown in Figure 1.Wherein V is voltage regulator final stage transistor, and W is generating
Machine Exciting Windings for Transverse Differential Protection, in Exciting Windings for Transverse Differential Protection also and the flow tube D that continues.(a) is excited state in figure, transistor turns, and exciting current exists
Growth state, (b) is deexcitation magnetic state in figure, transistor cutoff, and exciting current carries out afterflow by D.Voltage regulator passes through
The cut-off and conducting of pulse width modulation mode controlling transistor.
The switching curve of monocrystal tubular type voltage regulator is as shown in Fig. 2 its switch periods T is ON time ton, ended
Time toff, opening process time tr, turn off process time tf sums.Transistor switch works with the waveform of exciting current as schemed
Shown in 3, wherein Δ I is the pulsation of exciting current.
In conventional power generation systems, when voltage regulator switching frequency is 1200Hz, exciting current pulsation rate is more than 1%.
Because the pulsation of exciting current can cause the pulsation of generator output end voltage, so as to directly affect the quality of out-put supply.With
The continuous lifting of aviation power system growth requirement, such as generator speed scope is wider, output voltage is higher, power output
Bigger, power quality requires more high, need to improve the switching frequency of pulsewidth modulation, improve the degree of regulation of dynamo governor,
And system optimizing control, and then reduce exciting current pulsation.And traditional monocrystal tubular type voltage regulator is intrinsic due to device
Characteristic, exciting current produce the limitation with afterflow mode etc., and when the switching frequency of pulsewidth modulation is improved by the order of magnitude, it is led
The logical influence of time, deadline, exciting current time of afterflow in controlling cycle highlights, i.e., within deadline, excitation electricity
Time scale needed for stream consumption is excessive, causes the generator voltage in cut-off uncontrolled.
Because monocrystal tubular type voltage regulator loses degree of regulation in high-frequency pulsed width modulation, in addition it is uncontrolled, therefore
Current demand can not be met.
The content of the invention
To solve the problems, such as that prior art is present, the present invention proposes a kind of generator H bridges suitable for aviation power system
Excitation unit, realize high control precision, efficient aerogenerator exciting method.
The present invention uses H bridge power model conceptual designs to excitation circuit, and topological structure is as shown in Figure 4.Wherein
V1-V4 is device for power switching, is laid out design by the scheme of H bridges, driving control signal can be independently controlled to V1-V4
It is opened and turned off.V1 manages for upper left, and V2 manages for lower-left, and V3 is upper right pipe, and mutually claims to manage pipe, V4 for bottom right with V2, and with
V1 mutually claims to pipe.Control is in use, the pipe of above and below one side two is avoided together the methods of can use dead band in unilateral two path control signal
When turn on.L is generator excitation winding, is flowed through when V1, V4 turn on to pipe when the L sense of current turns on V2, V3 to pipe
The sense of current with control for the generation of exciter current of generator on the contrary, so that provide brand-new method.
Wherein, under excited state, the drive control of diagonal power tube uses overlapping conducting in H bridges.I.e. when certain a pair
During the power tube control conducting of angle, the time caused by exciting current is the time that this is simultaneously turned on to pipe.As shown in fig. 7, in diagonal
Upper tube first turns on, and is turned on down tube, and total effective ON time is the overlapping conducting time of driving control signal.
And under deexcitation magnetic state, realize that excitation is returned by the single tube conducting of down tube in H bridges and the device property of power tube
The afterflow on road and demagnetization.When diagonal power tube turns on, upper tube first turns on, and is turned on behind ShiShimonoseki, and its lap is exciting current
Generation time.After upper tube turns off, down tube still turns on a period of time, and such as t3 sections in Fig. 7, only one down tube turns in H bridges, the section
In time, due to fly-wheel diode be present inside power device, with reference to Fig. 4 topological structure, continuous current circuit is：Flow out and pass through from L
V4 forms closed loop through the diode inside V2 again, so as to realize the afterflow of energized circuit and demagnetization.
In addition, by carrying out timesharing conducting to the power tube in H bridge power models, realize on generator excitation winding L
The transformation in exciting current direction.As shown in topological structure in Fig. 4, L is generator excitation winding, is flowed when V1, V4 turn on to pipe
Exciting current through L flows to：The L closed loops after V4 again are flowed through from V1；L exciting current stream is flowed through when V2, V3 turn on to pipe
Xiang Wei：The L closed loops after V2 again are flowed through from V3.Turned on, that is, realized on generator excitation winding L by two groups of timesharing to pipe
The transformation in exciting current direction.
Analyzed based on above-mentioned principle, the technical scheme is that：
A kind of generator H bridge excitation units suitable for aviation power system, it is characterised in that：Utilize four power
Tube device forms the excitation circuit of H bridge power model modes, including upper left pipe V1, lower-left pipe V2, mutual with lower-left pipe V2
For the upper right pipe V3 to pipe, with upper left pipe V1 each other to the bottom right pipe V4 of pipe, and generator excitation winding L；Drive control is believed
Number independent break-make controls can be carried out to four power tube devices respectively；When V1, V4 turn on to pipe, exciting current flows through from V1
L closed loops after V4 again；When V2, V3 turn on to pipe, exciting current flows through the L closed loops after V2 again from V3, flows through L exciting current
The exciting current that L is flowed through when direction turns on V1, V4 to pipe is in opposite direction.
Further preferred scheme, a kind of generator H bridge excitation units suitable for aviation power system, its feature
It is：The type selecting of power tube is insulated gate bipolar transistor.
A kind of method that aviation power system generator H bridge excitations are realized using said apparatus, it is characterised in that：
Under excited state, the drive control of diagonal power tube uses overlapping conducting mode in H bridges：Driving control signal controls certain a pair
Diagonal power tube conducting, time caused by exciting current are the time that this is simultaneously turned on to diagonal power tube；In deexcitation magnetic state
Under, afterflow and the demagnetization of energized circuit are realized by the single tube conducting of down tube in H bridges and the device property of power tube：When certain a pair
After the upper tube shut-off of diagonal power tube, down tube still turns on for a period of time, and forming continuous current circuit realization between two down tubes in H bridges encourages
The afterflow of magnetic loop and demagnetization.
Further preferred scheme, a kind of generator H bridge exciting methods suitable for aviation power system, its feature
It is：Control V1, V4 to turn on pipe to pipe timesharing with V2, V3 by driving control signal, realize and encouraged on generator excitation winding L
The transformation of the magnetic sense of current.
Further preferred scheme, a kind of generator H bridge exciting methods suitable for aviation power system, its feature
It is：Two pipes above and below one side are avoided to simultaneously turn on using dead band method in the unilateral driving control signal of two pipes up and down.
Beneficial effect
The present invention provides one kind generator excitation unit and method suitable for aviation power system.First, the present invention adopts
It is designed with power tube device with the topological structure of H bridges, its timesharing can be realized by the independent control to each power tube
Conducting.
During work, one in H bridges two diagonal power tubes are carried out with pulse width modulation controlled, another two diagonal power
Management and control is made as off-state, and the direction of its exciting current changes simply after diagonal control is changed, and without changing external cabling, such as schemes
Shown in 5.
The type selecting of power tube is insulated gate bipolar transistor, and its internal fast recovery diode can be in the continuous of energized circuit
Used in stream and demagnetization, under the deexcitation magnetic state in controlling cycle, control is turned on by the timesharing to power tube, spy can be formed
Some afterflows and magnetism elimination circuit, as shown in fig. 6, without and the flow tube that continues.
Under excited state in controlling cycle, the driving for carrying out a pair of power tubes of pulsewidth modulation uses non-same-phase control
System, effective ON time are the overlapping portion of control signal, as shown in fig. 7, connecting characteristic fast, that shut-off is slow for single power tube
Made up, when the switching frequency of pulsewidth modulation is improved by the order of magnitude, effectively raise field circuit control accuracy, from
And exciting current pulsation rate is reduced, and then improve generator end out-put supply quality.
The additional aspect and advantage of the present invention will be set forth in part in the description, and will partly become from the following description
Obtain substantially, or recognized by the practice of the present invention.
Brief description of the drawings
The above-mentioned and/or additional aspect and advantage of the present invention will become in the description from combination accompanying drawings below to embodiment
Substantially and it is readily appreciated that, wherein：
Fig. 1 is monocrystal tubular type voltage regulator topologies structural representation of the prior art；(a) transistor V is open-minded, encourages
Magnetoelectricity stream ijIncrease, (b) transistor V cut-off exciting current D afterflows；
Fig. 2 is the switching curve figure of monocrystal tubular type voltage regulator；ton- ON time；toff- deadline；tr—
The switching process time；tt- procedures of turn-off the time；
Fig. 3 is single-transistor switch work and the oscillogram of exciting current；
Fig. 4 is the generator H bridge excitation mode topological structure schematic diagrames in the embodiment of the present invention；
Fig. 5 is the H bridge excitation mode exciting current direction schematic diagrams in the embodiment of the present invention；
Fig. 6 is H bridge excitation mode afterflows and magnetism elimination circuit schematic diagram in the embodiment of the present invention；
Fig. 7 is the H bridge excitation mode control signal oscillograms in the embodiment of the present invention.
Embodiment
Embodiments of the invention are described below in detail, the example of the embodiment is shown in the drawings, wherein from beginning to end
Same or similar label represents same or similar element or the element with same or like function.Below with reference to attached
The embodiment of figure description is exemplary, it is intended to for explaining the present invention, and is not considered as limiting the invention.
In the description of the invention, it is to be understood that term " " center ", " longitudinal direction ", " transverse direction ", " length ", " width ",
" thickness ", " on ", " under ", "front", "rear", "left", "right", " vertical ", " level ", " top ", " bottom ", " interior ", " outer ", " up time
The orientation or position relationship of the instruction such as pin ", " counterclockwise " are based on orientation shown in the drawings or position relationship, are for only for ease of
Description is of the invention to be described with simplified, rather than the device or element of instruction or hint meaning must be with specific orientation, Yi Te
Fixed azimuth configuration and operation, therefore be not considered as limiting the invention.
Because the present invention is the generator excitation method for aviation power system, below in conjunction with voltage in power-supply system
The operation principle of adjuster, and in adjuster the H bridge exciting methods of generator application, to the technology in the embodiment of the present invention
Scheme carries out clear, complete description.
Voltage regulator quickly carries out PID by the system real-time status parameter such as sensitive generator voltage, load current
Computing, excitation control signal is exported, control the conducting and cut-off of power tube in field circuit, so as to adjust exciting current size,
In simple terms, if motor output end voltage is less than desired value, control excitation conducting, exciting current is increased, conversely, then control is encouraged
Magnetic ends, and reduces exciting current, i.e., by the high-frequency pulsed width modulation to exciting current, and then realizes the fast of generator voltage
Speed, efficiently regulation.
Generator H bridge exciting powers module selects IPM SPM PM75B4L1C060 in the present invention, and its inside will
Device for power switching, drive circuit are integrated in one, and with fault detection capabilities such as overvoltage, overcurrent, excess temperatures, with use
The designs such as independent power device, independent driving, independent failure detection protection compare, its small volume, integrated height, efficiency high,
It is easy to use.H bridges structural circuit topology is as shown in Figure 4 inside the SPM.
During using generator H bridge excitations, in the single regulating cycle T of control, its control sequential is as shown in Figure 7.With V1,
V4 is illustrated exemplified by two diagonal power tubes of pulsewidth modulation, and the diagonal power tube control of V2, V3 is normal under this state
Cut-off.
In the t1 periods, V1 pipes turn in H bridges, the cut-off of V4 pipes, excitation-free current loop, for the cut-off before excitation conducting
Section.
In the t2 periods, V1 pipes turn in H bridges, the conducting of V4 pipes, produce energized circuit, exciting current flow direction is as in Fig. 5 (a)
It is shown.
In the t3 periods, V1 pipes end in H bridges, the conducting of V4 pipes, energized circuit shut-off, due to reverse two pole in V2 pipes be present
Pipe, continuous current circuit is formed by V2, V4, realizes demagnetization, continuous current circuit is as shown in Figure 6.
In the t4 periods, V1 pipes end in H bridges, the cut-off of V4 pipes, end section for excitation.
It can be seen from figure 7 that in single regulating cycle T, effective ON time is t2 periods, t2 and controlling cycle
T ratio is the conducting dutycycle under the cycle.When controlling energized circuit shut-off, when opportunity is by t3 caused by continuous current circuit
Between section beginning and directly trigger, realize continuous current circuit with reference to the backward dioded inside power tube.
When the switching frequency of voltage regulator pulsewidth modulation is lifted by the order of magnitude, using the method for generator H bridge excitations,
The degree of regulation of voltage regulator is then effectively raised, and then improves the quality of generator end out-put supply, solves list
The problem of power tube turn-off time length produces hangover and influences control accuracy.
Although embodiments of the invention have been shown and described above, it is to be understood that above-described embodiment is example
Property, it is impossible to limitation of the present invention is interpreted as, one of ordinary skill in the art is not departing from the principle and objective of the present invention
In the case of above-described embodiment can be changed within the scope of the invention, change, replace and modification.
Claims (5)
- A kind of 1. generator H bridge excitation units suitable for aviation power system, it is characterised in that：Utilize four power tube devices The excitation circuit of H bridge power model modes, including upper left pipe V1, lower-left pipe V2 are formed, with lower-left pipe V2 each other to pipe Upper right pipe V3, with upper left pipe V1 each other to the bottom right pipe V4 of pipe, and generator excitation winding L；Driving control signal can Independent break-make control is carried out to four power tube devices respectively；When V1, V4 turn on to pipe, exciting current flows through L from V1 and passed through again Closed loop after V4；When V2, V3 turn on to pipe, exciting current flows through the L closed loops after V2 again from V3, flows through L exciting current direction The exciting current that L is flowed through when being turned on V1, V4 to pipe is in opposite direction.
- A kind of 2. generator H bridge excitation units suitable for aviation power system according to claim 1, it is characterised in that： The type selecting of power tube is insulated gate bipolar transistor.
- 3. a kind of aviation power system generator H bridge exciting methods realized using claim 1 described device, its feature are existed In：Under excited state, the drive control of diagonal power tube uses overlapping conducting mode in H bridges：Driving control signal controls Certain a pair diagonal power tube conductings, the time caused by exciting current is the time that this is simultaneously turned on to diagonal power tube；In deexcitation Under magnetic state, afterflow and the demagnetization of energized circuit are realized by the single tube conducting of down tube in H bridges and the device property of power tube：When After the upper tube shut-off of certain a pair diagonal power tubes, down tube is still turned on for a period of time, and continuous current circuit is formed between two down tubes in H bridges Realize afterflow and the demagnetization of energized circuit.
- A kind of 4. generator H bridge exciting methods suitable for aviation power system according to claim 3, it is characterised in that： Control V1, V4 to turn on pipe to pipe timesharing with V2, V3 by driving control signal, realize excitation electricity on generator excitation winding L Flow the transformation in direction.
- A kind of 5. generator H bridge exciting methods suitable for aviation power system according to claim 3, it is characterised in that： Two pipes above and below one side are avoided to simultaneously turn on using dead band method in the unilateral driving control signal of two pipes up and down.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710981076.0A CN107733306A (en) | 2017-10-20 | 2017-10-20 | A kind of generator H bridges excitation unit and method suitable for aviation power system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710981076.0A CN107733306A (en) | 2017-10-20 | 2017-10-20 | A kind of generator H bridges excitation unit and method suitable for aviation power system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115940713A (en) * | 2022-11-29 | 2023-04-07 | 南京航空航天大学 | Resonance de-excitation device for electrically excited motor |
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Application publication date: 20180223 |