CN101079578A - Matrix converter - Google Patents
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- CN101079578A CN101079578A CN 200610123987 CN200610123987A CN101079578A CN 101079578 A CN101079578 A CN 101079578A CN 200610123987 CN200610123987 CN 200610123987 CN 200610123987 A CN200610123987 A CN 200610123987A CN 101079578 A CN101079578 A CN 101079578A
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Abstract
The invention discloses a matrix typed transformer, which comprises the following parts: shaping circuit, feedback circuit, single-chip set, main circuit of matrix typed transformer, wherein the CPO+ and CPO- of comparing circuit of the shaping circuit and single-chip set connect; the feedback circuit connects the AIN0 and AIN1 analog input of single-chip set; the digital I-to-O port Tx and Rx of single-chip set are connected with the display and keyboard; the P1, P2, P3 ports of the single-chip set is connected with the thyristor controlling pole of main matrix typed transforming circuit through photoelectric separator and power amplifier; the input end of the main matrix typed transformer is connected with power and the output end is connected with the load motor. The invention has advantages of reliable safety, simple equipment, compact structure, cheap price, stable property, high power factor, convenient using to save power obviously, which is fit for large power and super large power device domain.
Description
Technical field
The present invention relates to ac motor variable frequency speed regulating device, specifically be meant matrix converter.
Background technology
Chang Yong variable-frequency control technique has friendship-straight-friendship and friendship-friendship dual mode in the market.
Existing friendship-straight-alternation speed regulating device frequently is present main products, the rectification of alternating current elder generation is a direct current, again dc inversion is become the alternating current of frequency, voltage controlled, it must working voltage and current class far below the IGBT pipe switching device of thyristor, when being used for the high-power or superpower occasion of high voltage, big electric current, must adopt multistage and multiple folded technology, therefore its control technology complexity, the realization difficulty is big, cause device volume huge, owing to will first rectification be direct current so that produce Harmonic Interference, electrical network is produced pollute simultaneously.Friendship-straight-alternation speed regulating device frequently more has following shortcoming: power factor is low, filter capacitor price height, life-span weak point, wherein core parts IGBT pipe is domestic can't produce at present, all grasp in only several companies of foreign country hand, and homemade frequency converter product does not have independent intellectual property right basically, be merely able to occupy-little part low-end product share, on technology and product quality, do not possess competitiveness.
The a-c cycle scope that traditional friendship-alternation frequency speed regulating device are exported all is limited in below 1/3～1/2 of 50 hertz of input AC frequencies, and speed adjustable range is little; In order to satisfy high power motor speed governing requirement, speed regulating device are often bulky, with high costs frequently for traditional friendship-alternation, and serious and power factor is low to electric network pollution.Series of advantages such as but the appearance of frequency conversion and speed regulation of AC motor technology makes the alternating current machine continuous speed regulation system simple in structure with it, and is easy to maintenance are replacing direct current machine and other speed adjusting techniques, obtain application more and more widely in the Electric Traction field.China coastal economy developed regions have begun to adopt the frequency conversion and speed regulation of AC motor product at present, and the already used frequency converter of China (hand over-straight-hand over and a small amount of friendship-friendship) total capacity is about 2,000 ten thousand kilowatts, wherein 70% is applied to blower fan and pump-type load.
According to incompletely statistics, the existing all kinds of motor installation total capacities in the whole nation are more than 500,000,000 kilowatt, and the power consumption that these equipment are added up accounts for 80% of industrial electric weight, accounts for more than 30% of national generating capacity.Wherein half, promptly 2.5 hundred million kilowatts capacity is blower fan and load of the pumps, its overwhelming majority still adopts simple air door plate washer or valve regulated flow, work do not need that part of air or water outwards to drain, this just means a large amount of energy wastes.
Statistics shows that the alternating current motor gross power of the present required transformation of China is about 1,000 hundred million kilowatt hours, and the overall market is worth and is about 65,000,000,000 yuans.
Scholarly forecast, in the five-year, will there be 20% blower fan in China, and pump machinery adopts converter technique to transform, and probably needs 5,000 ten thousand kilowatts AC frequency conversion apparatus, and the output value is above 20,000,000,000 yuan.
" green " converter that possesses following performance is just being studied in countries in the world: (1) input and output electric current all is sinusoidal; (2) input power factor is controlled, and its power factor of band any load is 1.0; (3) power frequency has any controlled output frequency and voltage up and down; (4) power transfer is reversible; (5) no bulky filter capacitor.
This converter development is existing two more than ten years so far, but still have following problem not solve, therefore also can't industrialization.
(1) fail to realize the succinct reliable change of current of bidirectional switch, though complicated multiple commutation technique is arranged, because the performance (low-voltage, little electric current) of main switching device makes it to only limit to middle voltage, low voltage devices;
(2) the output-input voltage ratio only limits to 0.866, and it is limited that motor is exerted oneself;
(3) protection of bidirectional switch device and main circuit input and output filter circuit complexity.
Summary of the invention
The present invention is in order to overcome the deficiency that above prior art exists, provide a kind of safe and reliable, equipment succinct, compact conformation, cheap, the matrix converter that is applicable to large, medium and small power and superpower occasion, saves energy.
Purpose of the present invention realizes by following technical scheme: this matrix converter comprises shaping circuit, feedback circuit, single-chip microcomputer, matrix converter main circuit, the CP0 of the comparison circuit of shaping circuit and single-chip microcomputer
+, CP0
-Connect, feedback circuit is connected with AIN0, the AIN1 analog input mouth of single-chip microcomputer, and the digital I/O port Tx of single-chip microcomputer, Rx mouth are connected with keyboard with display; The P1 of single-chip microcomputer, P2, P3 port are connected with the thyristor control utmost point of matrix form conversion main circuit with power amplifier by photoisolator, and the input of matrix converter main circuit is connected with power supply, and output is connected with load motor.
Described matrix converter main circuit is single matrix form conversion main circuit or double-matrix formula conversion main circuit.
The control method of described matrix converter comprises the steps:
(1) synchronizing signal is sent into the single-chip microcomputer comparator circuit through shaping circuit, enters INT0 again different function units is worked in order, and the timing alignment initial angle is eliminated accumulated error simultaneously;
(2) feedback signal through feedback circuit enter analog input mouth AIN0, the AIN1 of single-chip microcomputer and specified rate relatively after, adjust control;
(3) display, keyboard link to each other with the Tx mouth with the Rx mouth of single-chip microcomputer and show various signals and human-computer dialogue;
(4) single-chip microcomputer P1, P2, P3 port are used to send modulate and control impulse, its pulse is after photoelectricity isolation and power amplification, the control utmost point that is added on matrix form conversion main circuit respective thyristor makes it conducting, the circulation unsteady flow of employing AC-AC frequency conversion and the technology of pulse-width modulation are set up target function and are modulated, cause electric current by of the thyristor groups of nodes two-way flow of modulation rule at matrix, adjust respective thyristor conducting angle, can obtain the frequency of motor setting and required pressure regulation electric power.
The present invention has following advantage and beneficial effect with respect to prior art:
(1) this matrix converter is a kind of " green " frequency converter, realized alternating current with 50 hertz in externally fed electrical network, be directly changed into the output AC of from 0 to 50 hertz or higher frequency, because of its input and out-put supply nearly all are sinusoidal, the power factor that has overcome friendship-straight-alternation frequency device is low, power supply grid is produced problems such as harmonic pollution, its input power factor can be controlled near 1.0.Supply with under the nervous relatively situation at China's electric power resource, promote this matrix form ac variable speed technology, for reducing energy resource consumption, improve power supply grid total quality and safety operation level, for improving business economic benefit and social benefit, build environmental type society and science sustainable development society, with significant.
(2) not to be subjected to output voltage and input voltage ratio be 0.866 restriction to present technique, and promptly under equal conditions, the output voltage height of present technique causes Motor torque to increase; The change of current of this matrix converter is safe and reliable, and equipment is succinct, and compact conformation is cheap, and high-power and its volume of superpower device of equal power capacity is estimated as about 1/20th of friendship-straight-alternation frequency speed regulating device; The present technique main circuit need not big capacity LC energy storage and forced commutation element, and technical difficulty is little, and cost is low.
(3) the two-way gate-controlled switch of this matrix form conversion main circuit has used production, use, installation, maintenance conveniently, stable performance (voltage is up to 8000 volts, and electric current is greatly to 4000 amperes), cheap thyristor.China's engineering skill personnel have rich experience and superb technical ability at aspects such as the production of thyristor, use, maintenances for a long time, can produce in a large number, not controlled by the main switching device IGBT of foreign corporation's high price; Use the reliable commutation technique and the control strategy of thyristor, after deliberation and experimental results show that it is safe and reliable; Add and use the Optical Fiber Transmission control signal, will make matrix converter can strong electromagnetic wave disturb and high explosive gas environment in reliable more, trouble free service; This at pollution-free, the explosion-proof secure context again of energy, provides very sufficient, necessary technical guarantee to the motor variable-frequency speed-regulating in coal, mine field.
(4) this matrix converter can be applied to middle low power motor drive control system, as blower fan, pump class, compressor, elevator, centrifuge, rotary kiln, ball mill, hauling machine, take off coal (ore) machine, oil production machine etc.; Be specially adapted to large-scale and super-huge alternating current machine drive control system, as irrigation and drainage machine, wind tunnel experiment machine, naval vessel electric propulsion machine, rolling mill, train electric motor car etc.Hand over-straight-alternation frequently device uses switching device to manage as IGBT, and the voltage of IGBT pipe, current class are lower than thyristor, so be difficult to set foot in high-power and superpower frequency converter field; And the present technique switch element can be supported the equipment that 5000KW is above, and as seen, this Matrix Technology device will be come out top in high-power and superpower apparatus field.
Description of drawings
Fig. 1 is the structural representation of matrix converter of the present invention;
Fig. 2 is the structural representation that matrix form conversion main circuit shown in Figure 1 is single matrix form conversion main circuit;
Fig. 3 is a matrix form conversion main circuit shown in Figure 1
Fig. 4 is the structural representation that matrix form conversion main circuit shown in Figure 1 is a double-matrix formula conversion main circuit.
Embodiment
The present invention is further described below in conjunction with drawings and Examples.
As shown in Figure 1, this matrix converter comprises shaping circuit, feedback circuit, single-chip microcomputer, matrix converter main circuit, the CP0 of the comparison circuit of shaping circuit and single-chip microcomputer
+, CP0
-Connect, feedback circuit is connected with AIN0, the AIN1 analog input mouth of single-chip microcomputer, and the digital I/O port Tx of single-chip microcomputer, Rx mouth are connected with keyboard with display; The P1 of single-chip microcomputer, P2, P3 port are connected with the thyristor control utmost point of matrix form conversion main circuit with power amplifier by photoisolator, and the input of matrix converter main circuit is connected with power supply, and output is connected with load motor.
This matrix converter is to realize control like this:
(1) synchronizing signal is sent into the single-chip microcomputer comparator circuit through shaping circuit, enters INT0 again different function units is worked in order, and the timing alignment initial angle is eliminated accumulated error simultaneously;
(2) feedback signal through feedback circuit enter analog input mouth AIN0, the AIN1 of single-chip microcomputer and specified rate relatively after, adjust control;
(3) display, keyboard link to each other with the Tx mouth with the Rx mouth of single-chip microcomputer and show various signals and human-computer dialogue;
(4) single-chip microcomputer P1, P2, P3 port are used to send modulate and control impulse, its pulse is after photoelectricity isolation and power amplification, the control utmost point that is added on matrix form conversion main circuit respective thyristor makes it conducting, the circulation unsteady flow of employing AC-AC frequency conversion and the technology of pulse-width modulation are set up target function and are modulated, cause electric current by of the thyristor groups of nodes two-way flow of modulation rule at matrix, adjust respective thyristor conducting angle, can obtain the frequency of motor setting and required pressure regulation electric power.
When matrix form conversion main circuit is single matrix form conversion main circuit, as shown in Figure 2, three-phase alternating-current supply (3 Φ～, 380V～10000V, 50HZ～60HZ) is connected to main circuit input ABC, output RST (3 φ～, voltage becomes with frequency, maximum 380V～10000V, 0～50HZ, 60HZ) receive threephase load motor M, ((3 φ～RST) are intersected by two-way gate-controlled switch thyristor and are connected three-phase alternating current incoming line in the main circuit for 3 φ～ABC) and three-phase alternating current output line, the computer follow procedure sends pulse and opens matrix form main circuit thyristor groups of nodes, make electric current by the two-way flow of modulation rule, and need not heavy LC energy storage and forced commutation element.Three-phase alternating-current supply voltage and frequency can be adjusted accordingly according to the variation of load motor M, thereby have optimized the energy consumption and the efficient of alternating current motor significantly.
When matrix form conversion main circuit was double-matrix formula conversion main circuit, as shown in Figure 3, double-matrix formula inverter main circuit was applied to super-huge power occasion, and its performance is more superior.The two-matrix transformation device adopts two three phase mains to receive main circuit input (ABC, A ' B ' C '), the three phase variable frequency of output (RST), pressure regulation electric power are received on the load motor M, input (ABC, A ' B ' C ') with between the output (RST) intersect by two-way gate-controlled switch thyristor and to be connected the pulse control that the modulation rule is sent by computer program.
Above-mentioned embodiment is the preferred embodiments of the present invention; can not limit claim of the present invention; other any change or other equivalent substitute mode that does not deviate from technical scheme of the present invention and made is included within protection scope of the present invention.
Claims (3)
1, matrix converter comprises shaping circuit, feedback circuit, single-chip microcomputer, matrix converter main circuit, it is characterized in that: the CP0 of the comparison circuit of shaping circuit and single-chip microcomputer
+, CP0
-Connect, feedback circuit is connected with AIN0, the AIN1 analog input mouth of single-chip microcomputer, and the digital I/O port Tx of single-chip microcomputer, Rx mouth are connected with keyboard with display; The P1 of single-chip microcomputer, P2, P3 port are connected with the thyristor control utmost point of matrix form conversion main circuit with power amplifier by photoisolator, and the input of matrix converter main circuit is connected with power supply, and output is connected with load motor.
2, matrix converter according to claim 1 is characterized in that: described matrix converter main circuit is single matrix form conversion main circuit or double-matrix formula conversion main circuit.
3, adopt the control method of the described matrix converter of claim 1, it is characterized in that may further comprise the steps:
(1) synchronizing signal is sent into the single-chip microcomputer comparator circuit through shaping circuit, enters INT0 again different function units is worked in order, and the timing alignment initial angle is eliminated accumulated error simultaneously;
(2) feedback signal through feedback circuit enter analog input mouth AIN0, the AIN1 of single-chip microcomputer and specified rate relatively after, adjust control;
(3) display, keyboard link to each other with the Tx mouth with the Rx mouth of single-chip microcomputer and show various signals and human-computer dialogue;
(4) single-chip microcomputer P1, P2, P3 port are used to send modulate and control impulse, its pulse is after photoelectricity isolation and power amplification, the control utmost point that is added on matrix form conversion main circuit respective thyristor makes it conducting, the circulation unsteady flow of employing AC-AC frequency conversion and the technology of pulse-width modulation are set up target function and are modulated, cause electric current by of the thyristor groups of nodes two-way flow of modulation rule at matrix, adjust respective thyristor conducting angle, can obtain the frequency of motor setting and required pressure regulation electric power.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610123987 CN101079578A (en) | 2006-12-01 | 2006-12-01 | Matrix converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610123987 CN101079578A (en) | 2006-12-01 | 2006-12-01 | Matrix converter |
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| CN101079578A true CN101079578A (en) | 2007-11-28 |
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|---|---|---|---|
| CN 200610123987 Pending CN101079578A (en) | 2006-12-01 | 2006-12-01 | Matrix converter |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102035398A (en) * | 2009-09-29 | 2011-04-27 | Abb瑞士有限公司 | Direct converter and system comprising such a direct converter |
| WO2021047130A1 (en) * | 2019-09-10 | 2021-03-18 | 东南大学 | Modular multi-level converter-based high-power motor driving system |
| CN113054856A (en) * | 2019-12-27 | 2021-06-29 | 新疆金风科技股份有限公司 | Converter valve tower, converter system and wind generating set |
-
2006
- 2006-12-01 CN CN 200610123987 patent/CN101079578A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102035398A (en) * | 2009-09-29 | 2011-04-27 | Abb瑞士有限公司 | Direct converter and system comprising such a direct converter |
| CN102035398B (en) * | 2009-09-29 | 2015-11-25 | Abb瑞士有限公司 | Direct transducer and there is the system of this direct transducer |
| WO2021047130A1 (en) * | 2019-09-10 | 2021-03-18 | 东南大学 | Modular multi-level converter-based high-power motor driving system |
| US11121641B1 (en) | 2019-09-10 | 2021-09-14 | Southeast University | High-power machine drive system based on modular multilevel converter |
| CN113054856A (en) * | 2019-12-27 | 2021-06-29 | 新疆金风科技股份有限公司 | Converter valve tower, converter system and wind generating set |
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