CN101964623A - Main power supply AC transformation device for plane - Google Patents
Main power supply AC transformation device for plane Download PDFInfo
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- CN101964623A CN101964623A CN 201010247240 CN201010247240A CN101964623A CN 101964623 A CN101964623 A CN 101964623A CN 201010247240 CN201010247240 CN 201010247240 CN 201010247240 A CN201010247240 A CN 201010247240A CN 101964623 A CN101964623 A CN 101964623A
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Abstract
The invention provides a main power supply AC transformation device for a plane, which comprises an AC/DC converting circuit, a DC/AC converting circuit, a preset switching point waveform generating circuit, a generator excitation control circuit, an output midpoint forming circuit, an output filtering circuit and an output isolation voltage sampling circuit in an end to end manner, and also comprises a closed loop connected with a plane AC generator, wherein the AC/DC converting circuit is used for converting AC output by the generator into pulsant DC, the DC/AC converting circuit is used for converting DC into AC through a three-phase bridge converter, a switching signal of the three-phase bridge converter is sent to a filtering circuit through the preset switching point waveform generating circuit connected in parallel with the DC/AC converting circuit for smooth rectification and then supplied for a rear-stage DC/AC converting circuit to the midpoint forming circuit, and a three-phase power signal obtained by the output filtering circuit is fed back to the generator excitation control circuit by the output isolation voltage sampling circuit to control the output of the plane AC generator.
Description
Technical field
The present invention relates to a kind of aircraft main power source AC converter that is used for aviation power system.
Background technology
At present, aircraft generally has two kinds for providing 115V/400Hz supply power mode single-phase or the three-phase voltage output AC.A kind of is that alternating current generator produces alternating current on the aircraft that adopts.Another kind is to carry out the DC/AC conversion with quiet change device, the direct current on the aircraft (direct current main power source or storage battery) is converted to exchange output.The pluses and minuses of this dual mode are that alternating current generator can be exported the high power AC electricity continuously for a long time, but output voltage stability is not high.And because its generator speed poor stability, the frequency stability of output is also poor, and this uses the equipment of three-phase alternating current as power supply for some, such as the precision of gyro, influences very big.
Though the quiet change device that adopts semiconductor device to constitute, the stability of its voltage and frequency is all fine, and efficient is not high.No matter low frequency mode or high-frequency mode, its efficient all is lower than 90%.Next is that power loss is bigger.Because its caloric value is bigger, and long-term work or high power work are limited in one's ability, therefore not too be suitable as the main power source of aircraft in addition.
Summary of the invention
The objective of the invention is weak point, provide a kind of voltage and frequency stability good, have greater efficiency (＞90%), the aircraft main power source AC converter of continuous operation for a long time at above-mentioned prior art existence.
The present invention realizes the above-mentioned purpose technical solution, can reach by following measure.A kind of aircraft main power source AC converter that the present invention proposes, comprise alternating-current generator of airplane, it is characterized in that, this device is by AC/DC converting circuit, AC, initialize switch point wave generator circuit, the generator excitation control circuit, dot circuit in the output, output filter circuit and output isolation voltage sample circuit ending are joined, and the closed loop that connects described alternating-current generator of airplane is formed, wherein, AC/DC converting circuit converts the alternating current of aircraft generator output to the direct current of pulsation, AC is converted into interchange by the direct current of the pulsation that the three-phase bridge converter produces AC/DC converting circuit, the switching signal of three-phase bridge converter then flows to filter circuit by the initialize switch point wave generator circuit in parallel with AC and carries out level and smooth shaping, supply with back level AC/DC and change circuit to middle dot circuit, and the three phase power signal that obtains of output filter circuit, feed back to the output that the generator excitation control circuit removes to control above-mentioned alternating-current generator of airplane by output isolation voltage sample circuit.
The present invention has following beneficial effect than prior art.
The switching signal of three-phase bridge converter of the present invention is passed through the initialize switch point wave generator circuit of employing, and has guaranteed the precision of output frequency, and voltage and frequency stability are good, and output voltage and frequency accuracy are up to 115 ± 1.5V and 400 ± 4Hz;
Power output is bigger, the efficient height.Dot circuit obtains the three-phase and four-line signal in the phase three-wire three signal process of wave generator circuit output, and by filter circuit output three-phase 400Hz signal.Power can reach 8kW～12kW, and efficient＞more than 90%.And the environmental test of having passed through the GJB requirement is examined.
Because initialize switch point wave generator circuit employing crystal is as clock, the stability of crystal clock has guaranteed the very high frequency stability of complete machine.
Description of drawings
In order more to be expressly understood the present invention, now will be by the embodiment of the invention, simultaneously with reference to accompanying drawing, the present invention be described, what set forth herein all is example with the three-phase power circuit, single phase circuit is more simple, at this repeated description not.Wherein:
Fig. 1 is the circuit block diagram of aircraft main power source AC converter of the present invention.
Fig. 2 is the AC/DC converting circuit block diagram among Fig. 1.
Fig. 3 is the AC block diagram among Fig. 1.
Fig. 4 is the generator excitation control circuit block diagram among Fig. 1.
Fig. 5 is an initialize switch point wave generator circuit block diagram of the present invention among Fig. 1.
Fig. 6 is the output filter circuit block diagram among Fig. 1.
Fig. 7 is that output mid point of the present invention forms circuit block diagram among Fig. 1.
Fig. 8 is an output isolation voltage sample circuit block diagram among Fig. 1.
Embodiment
Represented circuit overall work principle is done a summary among Fig. 1.
This contrive equipment is after alternating-current generator of airplane, this device is by AC/DC converting circuit, AC, initialize switch point wave generator circuit, the generator excitation control circuit, dot circuit in the output, output filter circuit and output isolation voltage sample circuit ending are joined, and connect the closed loop composition of described alternating-current generator of airplane.Wherein, AC/DC converting circuit converts the alternating current of aircraft generator output to the direct current of pulsation, AC is converted into interchange by the direct current of the pulsation that the three-phase bridge converter produces AC/DC converting circuit, the switching signal of three-phase bridge converter is by the precision of initialize switch point wave generator circuit output frequency, output is through dot circuit in the output, flow to filter circuit and carry out level and smooth shaping, make output filter circuit obtain three-phase 400Hz high-power signal, the precision of output voltage feeds back to the output that the generator excitation control circuit removes to control alternating current generator by output isolation voltage sample circuit.
In Fig. 2, AC/DC converting circuit is made up of the rectifier and the filter of mutual series connection.The three-phase alternating voltage of aircraft generator output converts the direct current of pulsation to by the rectified three-phase circuit of rectifier, and carries out level and smooth shaping by filter, supplies with level AC unit, back.
In Fig. 3, AC is made up of the three phase inverter bridge that has the inverter bridge control terminal.Three phase inverter bridge is formed full-bridge circuit by large power triode.Direct current from ac/dc conversion change-over circuit converts interchange to by above-mentioned three phase inverter bridge, and the drive signal of its generation is sent into by the inverter bridge control terminal, forms the switching value signal.
In Fig. 4, initialize switch point wave generator circuit is made up of wave generator circuit, shaping amplification circuit and the isolated drive circuit of mutual series connection.Through the prior accurate threephase switch amount signal that calculates, can one have 6 way switch amount signals and be stored in the memory of initialize switch point wave generator circuit.Behind the circuit working, the switching value signal carries out shaping by shaping amplification circuit and amplifies.Switching value signal after shaping is amplified is delivered to inverter bridge control terminal shown in Figure 3 through the transformer isolation driving of isolated drive circuit, the operating state of control three phase inverter bridge.
In Fig. 5, have the high-frequency pulsed width modulation waveform that excitation driver generator excitation control circuit can produce its width-adjustable reference voltage and the common control of output sampled voltage, be used for the direct voltage of power supply input is converted to the square wave of duty ratio variable (0-100%).This square wave is by behind the excitation driver, and formation one is used for the excitation AC power signal of alternating current generator on the aircraft.It is big to make it have an exciting current, the generator output voltage height; Exciting current is little, the characteristic that generator output voltage is low.Excitation control circuit is in the course of work: when output voltage descended, corresponding sampling and outputting voltage from output isolation voltage sample circuit also descended, and the duty ratio of excitation control circuit output will increase, thereby the excitation waveform pulsewidth is risen.Exciting current increases, and output voltage rises.Otherwise when the output voltage rising, corresponding sampling and outputting voltage from output isolation voltage sample circuit also rises, the duty ratio of control circuit output will reduce, and the excitation waveform pulsewidth is descended, and exciting current reduces, thereby output voltage is descended, play the effect of voltage stabilizing.When regulating adjustable reference voltage, the stationary value of output also can be done corresponding variation, and so just output voltage presets easily.
In Fig. 6, output filter circuit is made up of the LC low pass filter and the electromagnetic interface filter of parallel connection.The alternating current of alternating-current generator of airplane output can not directly be delivered to load by the interchange three-phase voltage of AC output and use, because the three phase power bridge is operated on off state, its output voltage is a switching waveform, the 400Hz/115V three-phase voltage that first-harmonic needs contains a large amount of harmonic components.Harmonic component is by behind the LC low pass filter, and most harmonic component is all by filtering.For guaranteeing the electromagnetic compatibility characteristic, can pass through the electromagnetic interface filter output AC voltage.
In Fig. 7, owing to require to be three-phase and four-line voltage on the aircraft mostly, for satisfying the output voltage requirement, mid point forms transformer and has added the function of boosting.And three-phase bridge is the voltage that is output as phase three-wire three, for this reason.Can form transformer with specially designed three-phase mid point and carry out the conversion of three-way/four lines, line voltage equated and the phase voltage step-down when three-way/four lines were changed.In dot circuit be to form the three-phase and four-line circuit that conversion that transformer carries out three-way/four lines constitutes through the three-phase mid point by the three-phase bridge three-phase three-line voltage.
Among Fig. 8, output voltage sampling circuit, sample from the output voltage two ends, there is small sample rate current to flow through by current/voltage converter and current/magnetic field transducer, this electric current is proportional to the voltage magnitude of output, and converter is made up of the precision resister device, can accurately control the size of this electric current, the current/magnetic field transducer is made of the coil of a multiturn, and the magnetic field that the electric current that flows through in the lead can be produced is strengthened.This magnetic field is by the magnetic field coupling, and the magnetic field/voltage sensor other by coil changes sampling and outputting voltage into.Owing to require to insulate between sampled signal and the lead-out terminal, so adopt magnetic field sensing can well satisfy these needs.Magnetic field/the voltage sensor of Cai Yonging is a hall device in the present invention, and hall device can all be made response to AC and DC magnetic field, so this sample circuit not only can be used to exchange sense samples, also can be used for the direct current sense samples.
Claims (6)
1. aircraft main power source AC converter, comprise alternating-current generator of airplane, it is characterized in that, this device is by AC/DC converting circuit, AC, initialize switch point wave generator circuit, the generator excitation control circuit, dot circuit in the output, output filter circuit and output isolation voltage sample circuit ending are joined, and the closed loop that connects described alternating-current generator of airplane is formed, wherein, AC/DC converting circuit converts the alternating current of aircraft generator output to the direct current of pulsation, AC is converted into interchange by the direct current of the pulsation that the three-phase bridge converter produces AC/DC converting circuit, the switching signal of three-phase bridge converter then flows to filter circuit by the initialize switch point wave generator circuit in parallel with AC and carries out level and smooth shaping, supply with back level AC/DC and change circuit to middle dot circuit, and the three phase power signal that obtains of output filter circuit, feed back to the output that the generator excitation control circuit removes to control above-mentioned alternating-current generator of airplane by output isolation voltage sample circuit.
2. aircraft main power source AC converter as claimed in claim 1 is characterized in that AC/DC converting circuit is made up of the rectifier and the filter of mutual series connection.
3. aircraft main power source AC converter as claimed in claim 1 is characterized in that initialize switch point wave generator circuit is made up of wave generator circuit, shaping amplification circuit and the isolated drive circuit of mutual series connection.
4. aircraft main power source AC converter as claimed in claim 1 is characterized in that AC is made up of the three phase inverter bridge that has the inverter bridge control terminal.
5. aircraft main power source AC converter as claimed in claim 1 is characterized in that output filter circuit is made up of the LC low pass filter and the electromagnetic interface filter of parallel connection.
6. aircraft main power source AC converter as claimed in claim 1 is characterized in that, described in dot circuit be to form the three-phase and four-line circuit that conversion that transformer carries out three-way/four lines constitutes through the three-phase mid point by the three-phase bridge three-phase three-line voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010247240 CN101964623A (en) | 2010-08-05 | 2010-08-05 | Main power supply AC transformation device for plane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010247240 CN101964623A (en) | 2010-08-05 | 2010-08-05 | Main power supply AC transformation device for plane |
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| CN101964623A true CN101964623A (en) | 2011-02-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201010247240 Pending CN101964623A (en) | 2010-08-05 | 2010-08-05 | Main power supply AC transformation device for plane |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105978422A (en) * | 2016-06-07 | 2016-09-28 | 中国南方航空工业(集团)有限公司 | Control device for helicopter AC power supply system |
| CN112468042A (en) * | 2020-10-26 | 2021-03-09 | 北京精密机电控制设备研究所 | Power take-off vehicle-mounted power supply system realized by direct-current voltage sampling circuit |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201018447Y (en) * | 2007-02-16 | 2008-02-06 | 吴德峰 | Inverter of generator |
| CN201134758Y (en) * | 2007-12-29 | 2008-10-15 | 成都飞机工业集团电子科技有限公司 | Wide voltage direct current/direct current converter |
| CN101640490A (en) * | 2009-09-02 | 2010-02-03 | 成都飞机工业集团电子科技有限公司 | DC/AC mute current transformer |
| CN201467056U (en) * | 2009-08-26 | 2010-05-12 | 何林 | Generating unit with switching power inverter |
-
2010
- 2010-08-05 CN CN 201010247240 patent/CN101964623A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201018447Y (en) * | 2007-02-16 | 2008-02-06 | 吴德峰 | Inverter of generator |
| CN201134758Y (en) * | 2007-12-29 | 2008-10-15 | 成都飞机工业集团电子科技有限公司 | Wide voltage direct current/direct current converter |
| CN201467056U (en) * | 2009-08-26 | 2010-05-12 | 何林 | Generating unit with switching power inverter |
| CN101640490A (en) * | 2009-09-02 | 2010-02-03 | 成都飞机工业集团电子科技有限公司 | DC/AC mute current transformer |
Non-Patent Citations (1)
| Title |
|---|
| 《西北工业大学硕士学位论文》 20031202 孟新意 新型飞机电源系统的设计研究 22-37，45-49 1-6 , 2 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105978422A (en) * | 2016-06-07 | 2016-09-28 | 中国南方航空工业(集团)有限公司 | Control device for helicopter AC power supply system |
| CN105978422B (en) * | 2016-06-07 | 2019-01-25 | 中国南方航空工业(集团)有限公司 | Helicopter AC power-supply system control device |
| CN112468042A (en) * | 2020-10-26 | 2021-03-09 | 北京精密机电控制设备研究所 | Power take-off vehicle-mounted power supply system realized by direct-current voltage sampling circuit |
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Application publication date: 20110202 |