CN102263490A - High-voltage frequency converter power unit drive-pulse transmission and communication system - Google Patents
High-voltage frequency converter power unit drive-pulse transmission and communication system Download PDFInfo
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- CN102263490A CN102263490A CN2011102263900A CN201110226390A CN102263490A CN 102263490 A CN102263490 A CN 102263490A CN 2011102263900 A CN2011102263900 A CN 2011102263900A CN 201110226390 A CN201110226390 A CN 201110226390A CN 102263490 A CN102263490 A CN 102263490A
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Abstract
The invention relates to a frequency converter technology, in particular to a cascade-type high-voltage frequency converter and tundish heating variable-frequency power supply power unit drive-pulse transmission and communication system, which is an application of an electronic technology in the frequency converter. The high-voltage frequency converter power unit drive-pulse transmission and communication system has the characteristics that the system comprises three optical-fiber cables which are connected with a master controller and a power unit, wherein two of the three optical-fiber cables are used for connecting and transmitting pulse drive signals of IGBT (Isolated Gate Bipolar Transistor) generated by the master controller, the pulse drive signals are changed into electrical signals after being connected to a photoelectric changeover circuit through the two optical-fiber cables, and then are connected to an interlock circuit to generate four paths of drive pulses to be sent to an IGBT driving module; and another one optical-fiber cable is a communication optical-fiber cable connected to the master controller from the power unit; and status information of the power unit is connected to the master controller by a power unit single-chip microcomputer through the optical-fiber cable via the photoelectric changeover circuit. Since no complex circuit and device is adopted in the whole circuit, the reliability of the circuit is obviously improved, especially the reliability of the circuit under a high-voltage and high-current working environment.
Description
Technical field
The present invention relates to converter technology, refer in particular to power cell driving pulse transmission of a kind of tandem type high voltage converter and tundish heating variable frequency power supply and communication system, is the application of electronic technology in frequency converter.
Background technology
At present high voltage converter mainly is divided into two kinds of voltage-source type and current source types according to the difference of filtering mode in the DC circuit, and the current source type frequency converter exists its application of shortcoming such as power factor is low, the input and output waveform is bad to be very limited.And the voltage-source type high voltage converter mainly contains three level types and many level of power unit cascade type.
Three level type frequency converters adopt clamp circuit, have solved the problem of the series connection of two power devices, and make phase voltage output have three level.The biggest problem that three-level converter runs into is a voltage problem, and its maximum output voltage does not reach 6KV, thus often need to adopt flexible method, or change the voltage of motor, or add step-up transformer at outlet side.This weakness has limited its application.
Many level of power unit cascade type adopts the power unit cascade of a plurality of low pressure to realize high pressure; the step-down transformer of input side adopts phase shift system; can effectively eliminate harmonic pollution to electrical network; outlet side adopts many level sinusoidal pulse width modulation PWM technology, applicable to the common electric machine of any voltage, in addition; when certain power cell breaks down; can log off automatically, and remaining power cell can continue to keep the operation of motor, reduce the loss that causes when shutting down.System adopts modularized design, can replace malfunctioning module rapidly.This shows that the market competitiveness of many level of units in series type frequency converter is clearly.Therefore, universal high voltage converter is that many level of units in series type frequency converter occupies the majority at present, more than about 7 one-tenth.
For capcade multi-level high-voltage frequency transfomrer and tandem type tundish heating variable frequency power supply, power cell is an important component part.In control system to power cell, relatively more commonly used is that main controller issues control signal to power cell by optical-fibre communications, and power cell produces driving pulse according to the main controller instruction, in the PWM control system, requirement to traffic rate is the microsecond level, needs to adopt very high communication speed.
Power cell in the existing capcade multi-level high-voltage frequency transfomrer; generally be that power cell independently produces the insulated gate bipolar transistor IGBT driving pulse; main controller is controlled power cell by asynchronous communication; main controller will descend signal and issue behind coding such as (pulsewidth, phase place, Bypass Control, reset); power cell receives the main controller communication command; control signal is translated as the switch controlling signal of four insulated gate bipolar transistor IGBTs of insulated gate bipolar transistor IGBT brachium pontis, and carries out interlocking and locking pulse protection judgement.The high speed that produces pulse has determined each power cell that the ability of high-speed serial communication and calculating all will be arranged, and the quick received communication order of energy is also made respective handling, calculates corresponding pulses and generates the necessary high speed device that adopts of device selection.Because each power cell communication and the time of calculating can not be synchronous fully, so the pulse meeting and the theory of its generation have deviation.And, fundamentally can not overcome the slower shortcoming of transmission delay and transmission speed because serial mode is adopted in communication.
Summary of the invention
The objective of the invention is to be improved and innovate, a kind of transmission of power cell driving pulse and the communication system that are used for capcade multi-level high-voltage frequency transfomrer and tandem type tundish heating variable frequency power supply simple in structure are provided at the shortcoming that exists in the background technology and problem.
High voltage transducer power unit driving pulse transmission of the present invention and communication system, comprise the optical fiber between three connection main controllers and the power cell, wherein two optical fiber connect the insulated gate bipolar transistor IGBT pulse drive signal that the transmission main controller produces, become the signal of telecommunication after by optical fiber pulse drive signal being connected to photoelectric switching circuit again, be connected to interlock circuit again and produce four road driving pulses to the insulated gate bipolar transistor IGBT driver module; Another is the telecommunication optical fiber that power cell is connected to main controller, and the power cell single-chip microcomputer connects main controller to the power cell state information by electro-optical conversion circuit through optical fiber.
After the present invention adopts such scheme, power cell need not independently produce pulse, driving pulse is transferred to each power cell after directly being produced by main controller, power cell only carries out simple interlock process to driving pulse, the no signal processing delay, do not need complicated communications command decoding in the power cell side, telecommunication circuit and chip need not particular design, and the common single-chip microcomputer of low speed just can satisfy need of work.The two-way drive pulse signal only needs just can export to the insulated gate bipolar transistor IGBT driver module after the simple gate circuit interlocking, and circuit is simple and reliable, and technical feasibility is good, and cost is low.Because entire circuit does not adopt complicated circuit and complex devices, has significantly improved the reliability of circuit, particularly under the high-voltage large current operational environment.
Description of drawings
Fig. 1 is a system block diagram of the present invention.
Fig. 2 is power cell rectification inverter circuit figure of the present invention.
Fig. 3 is an interlock circuit schematic diagram of the present invention.
Embodiment
By Fig. 1 to 3 as can be known, the present invention is by transmission of high voltage transducer power unit driving pulse and communication system, it is characterized in that comprising the optical fiber between three connection main controllers and the power cell, wherein two optical fiber 1 connect the insulated gate bipolar transistor IGBT pulse drive signal 2 that the transmission main controller produces, become the signal of telecommunication after by optical fiber pulse drive signal being connected to photoelectric switching circuit 3 again, be connected to interlock circuit 4 again and produce four road driving pulses to the insulated gate bipolar transistor IGBT driver module; Another is the telecommunication optical fiber 5 that power cell is connected to main controller, and power cell single-chip microcomputer 7 connects main controller to power cell state information 6 by electro-optical conversion circuit 8 through optical fiber.
Described power cell comprises rectification inverter circuit, wherein, D1-D6 constitutes rectification circuit by diode, after electrochemical capacitor C1, C2 filtering and energy exchange, direct current signal is connected to the inverter circuit that IGBT1-IGBT4 constitutes, the break-make of four insulated gate bipolar transistor IGBTs of power cell control realizes many level of output sinusoidal pulse width modulation PWM ripple again.Described interlock circuit comprise logical circuit not gate 12, XOR gate 13, with door 14, wherein the main controller pulse of sending through not gate 12, XOR gate 13, with door 14 after, the generation two-way can not be in the interlocking signal on the same logic level simultaneously, and the conducting simultaneously of insulated gate bipolar transistor IGBT upper and lower bridge arm.
Embodiment of the present invention only is the description that preferred implementation of the present invention is carried out; be not that design of the present invention and scope are limited; under the prerequisite that does not break away from design philosophy of the present invention; engineers and technicians make technical scheme of the present invention in this area various modification and improvement; all should fall into protection scope of the present invention; the technology contents that the present invention asks for protection all is documented in claims.
Claims (3)
1. a high voltage transducer power unit driving pulse transmits and communication system, it is characterized in that comprising the optical fiber between three connection main controllers and the power cell, wherein two optical fiber (1) connect the insulated gate bipolar transistor IGBT pulse drive signal (2) that the transmission main controller produces, become the signal of telecommunication after by optical fiber pulse drive signal being connected to photoelectric switching circuit (3) again, be connected to interlock circuit (4) again and produce four road driving pulses to the insulated gate bipolar transistor IGBT driver module; Another is the telecommunication optical fiber (5) that power cell is connected to main controller, and power cell single-chip microcomputer (7) connects main controller to power cell state information (6) by electro-optical conversion circuit (8) through optical fiber.
2. high voltage transducer power unit driving pulse transmission according to claim 1 and communication system, it is characterized in that described power cell comprises rectification inverter circuit, wherein, D1-D6 constitutes rectification circuit by diode, after electrochemical capacitor C1, C2 filtering and energy exchange, direct current signal is connected to the inverter circuit that IGBT1-IGBT4 constitutes, the break-make of four insulated gate bipolar transistor IGBTs of power cell control realizes many level of output sinusoidal pulse width modulation PWM ripple again.
3. high voltage transducer power unit driving pulse transmission according to claim 1 and communication system, it is characterized in that described interlock circuit comprise logical circuit not gate (12), XOR gate (13), with door (14), wherein the main controller pulse of sending through not gate (12), XOR gate (13), with door (14) after, the generation two-way can not be in the interlocking signal on the same logic level simultaneously, and the conducting simultaneously of insulated gate bipolar transistor IGBT upper and lower bridge arm.
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| CN2011102263900A CN102263490A (en) | 2011-08-09 | 2011-08-09 | High-voltage frequency converter power unit drive-pulse transmission and communication system |
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| CN2011102263900A CN102263490A (en) | 2011-08-09 | 2011-08-09 | High-voltage frequency converter power unit drive-pulse transmission and communication system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102710330A (en) * | 2012-05-22 | 2012-10-03 | 青岛四方车辆研究所有限公司 | Compact type PWM (pulse-width modulation) optical fiber converter |
| CN105119469A (en) * | 2015-08-28 | 2015-12-02 | 洛阳中重自动化工程有限责任公司 | Multi-path driving signal switching circuit for mining explosion-proof frequency converter and method |
| CN111600387A (en) * | 2020-05-26 | 2020-08-28 | 新风光电子科技股份有限公司 | Communication system and method for oil-immersed cascade SVG |
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| CN201528268U (en) * | 2009-11-05 | 2010-07-14 | 北京中矿华飞科技有限公司 | Pulse generator applied to high voltage frequency converter |
| CN201557102U (en) * | 2009-09-15 | 2010-08-18 | 上海船舶运输科学研究所 | Logic circuit of power grid generator set controller of ship |
| CN101951134A (en) * | 2010-08-24 | 2011-01-19 | 艾默生网络能源有限公司 | Cascade topology frequency converter and bypass topology thereof |
| CN202167981U (en) * | 2011-08-09 | 2012-03-14 | 湖南中科电气股份有限公司 | Power unit driving pulse transmission and communication system for high voltage frequency converter |
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2011
- 2011-08-09 CN CN2011102263900A patent/CN102263490A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN201557102U (en) * | 2009-09-15 | 2010-08-18 | 上海船舶运输科学研究所 | Logic circuit of power grid generator set controller of ship |
| CN201528268U (en) * | 2009-11-05 | 2010-07-14 | 北京中矿华飞科技有限公司 | Pulse generator applied to high voltage frequency converter |
| CN101951134A (en) * | 2010-08-24 | 2011-01-19 | 艾默生网络能源有限公司 | Cascade topology frequency converter and bypass topology thereof |
| CN202167981U (en) * | 2011-08-09 | 2012-03-14 | 湖南中科电气股份有限公司 | Power unit driving pulse transmission and communication system for high voltage frequency converter |
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| 崔志良等: "《高压大容量变频器中光纤通信系统研究》", 《电工电能新技术》, vol. 24, no. 4, 31 October 2005 (2005-10-31), pages 72 - 76 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102710330A (en) * | 2012-05-22 | 2012-10-03 | 青岛四方车辆研究所有限公司 | Compact type PWM (pulse-width modulation) optical fiber converter |
| CN105119469A (en) * | 2015-08-28 | 2015-12-02 | 洛阳中重自动化工程有限责任公司 | Multi-path driving signal switching circuit for mining explosion-proof frequency converter and method |
| CN111600387A (en) * | 2020-05-26 | 2020-08-28 | 新风光电子科技股份有限公司 | Communication system and method for oil-immersed cascade SVG |
| CN111600387B (en) * | 2020-05-26 | 2021-09-24 | 新风光电子科技股份有限公司 | Communication system and method for oil-immersed cascade SVG |
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Application publication date: 20111130 |