CN103219943B - High-frequency IGBT rotor frequency changer governing system - Google Patents
High-frequency IGBT rotor frequency changer governing system Download PDFInfo
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- CN103219943B CN103219943B CN201310129106.7A CN201310129106A CN103219943B CN 103219943 B CN103219943 B CN 103219943B CN 201310129106 A CN201310129106 A CN 201310129106A CN 103219943 B CN103219943 B CN 103219943B
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Abstract
The invention discloses a kind of high-frequency IGBT rotor frequency changer governing system in motor variable-frequency speed-regulating system field.Comprise Liquid soft start unit, control supply unit and speed regulating device, it is characterized in that: Liquid soft start unit can start high pressure internal feed or ordinary high pressure wound three-phase asynchronous motor by independent Automatic continuous, it is according to the feature of mechanical load, automatically changes starting resistance and regulates detent torque; High-frequency IGBT rotor frequency changer comprises rotor power device, active inverter and rectifier and forms.High-frequency IGBT rotor frequency changer is made up of IGBT module element; The Double-number DSP that speed regulating device control system adopts transmission to control and optical fibre control system.The present invention compared with prior art has that system reliability is high, structure is simple, easy to maintenance, components and parts are few and the advantage such as system cost is low.
Description
technical field:
The present invention relates to motor variable-frequency speed-regulating system field, specifically, the present invention is a kind of high-frequency IGBT rotor frequency changer governing system.
background technology:
Extensively high-voltage frequency conversion and speed-adjusting is adopted at present in electric machine speed regulation technology, along with the development of power electronic element and constantly bringing forth new ideas of electronic technology, variable-frequency control technique achieves very large achievement, but for high power motor because its control power is larger, therefore its components and parts are more, system is huge, volume is large, expensive, maintenance is large, maintenance cost is high and environment for use required high factor, limit the universal of it and development to a certain extent.High-frequency IGBT rotor frequency changer of the present invention, adopts state-of-the-art GBT module component in the world to produce, and is adopt current state-of-the-art dsp software and optical fiber to carry out control system.This high-frequency IGBT rotor frequency changer, adopt IGBT rotor power device the slip power of high-voltage high-power motor rotor portion to be shifted out the rotating speed that (change rotor frequency) changes motor, and the part slip power that rotor is moved out of, by IGBT active inverter, feed back to motor stator after being transformed to three-phase alternating-current supply to add winding and be recycled, thus reach optimum energy-saving effect, this rotor power device just controls about the 50% Power Recovery recycling that whole motor is wasted, so the components and parts that system adopts are few, system is little, reliability is high, structure is simple, volume is little, cost is low, easy to maintenance, maintenance cost is few, the advantages such as environment for use does not require.Small investment instant effect in project uses, will be popularized in a lot of field and development.
summary of the invention:
The object of the invention is to overcome the deficiencies in the prior art, a kind of high-frequency IGBT rotor frequency changer adopting modularized design is provided, adopt advanced IGBT module element to make rotor power device, active inverter and rectifier.Control system adopts advanced transmission to control special Double-number DSP and optical fibre control system, ensure that advance and the component module designing technique of governing system.
the present invention is achieved by the following technical solutions:
A kind of high-frequency IGBT rotor frequency changer governing system, comprise Liquid soft start unit, control supply unit and speed regulating device, it is characterized in that: Liquid soft start unit can start high pressure internal feed or ordinary high pressure wound three-phase asynchronous motor by independent Automatic continuous, it is according to the feature of mechanical load, automatically changes starting resistance and regulates detent torque; High-frequency IGBT rotor frequency changer comprises rotor power device, active inverter and rectifier and forms.High-frequency IGBT rotor frequency changer is made up of IGBT module element; The Double-number DSP that speed regulating device control system adopts transmission to control and optical fibre control system; Speed regulating device systems soft ware has digital filtering, software watchdog, software redundancy and software protection function, control signal to high-frequency I GBT and the monitoring to external status, avoid the impulse disturbances because the external world produces and the fault that causes of Electromagnetic Interference, drastically increase system reliability; Speed regulating device are provided with soft bypath system, when DSP detects that rotor-side variable frequency device breaks down suddenly, when motor is transferred to power frequency continuation operation by soft bypath system, the primary cut-out second class protection stop jumping of motor will be made to cause stopping production because of impulse current, ensure that fail safe and the stability of production; The module of the rotor power device of high-frequency IGBT rotor frequency changer, active inverter and rectifier is all installed concentratedly; The module of the rotor power device of high-frequency IGBT rotor frequency changer, active inverter and rectifier is arranged on funneling air duct radiation sheet, and all modules are installed concentratedly in spreader surface, and good cooling results not easily collects tired dust and causes creepage.Modules all is in addition arranged on the outside of radiator, and to changing module and safeguarding fast very convenient, this technology substantially increases fail safe, the reliability and stability of product; High-frequency IGBT rotor frequency changer adopts the β angle blocking technology of IGBT inverter, improves antijamming capability, inversion can not occur and the fault such as to overturn; High-frequency IGBT rotor frequency changer adopts the technology of synchronous signal processor, solves inverter and overturns failure problems, improve antijamming capability and multiplex digital servo-control and automatically join equal function; Liquid soft start unit is separately that the electrodeless continuously smooth of motor starts, and starting current is less than 1.2 times of Rated motor electric current.
the present invention compared with prior art has following beneficial effect:
1. reliability is high, structure is simple;
2., easy to maintenance;
3. components and parts are few, the little cost of system is low.
accompanying drawing illustrates:
Fig. 1: high-frequency IGBT rotor frequency changer system diagram.
embodiment:
Below in conjunction with drawings and Examples, particular content of the present invention is further described:
A kind of high-frequency IGBT rotor frequency changer governing system for high pressure internal feed or ordinary high pressure wound three-phase asynchronous motor, comprise Liquid soft start unit, control supply unit and speed regulating device, by liquid soft starter cabinet, control three groups one-tenth such as power cabinet, speed governing cabinet, adopt the cold-rolled steel sheet being not less than 2.5 ㎜ thickness to make.
One, the formation of Liquid soft start unit: Liquid soft start unit is the independent startup device for high-frequency IGBT rotor frequency changer designs, even if rotor-side variable frequency device fault, this starting drive also can independent Automatic continuous starter motor.This Liquid soft start unit is made up of tank bracket, cross-arm, the container of PFA teflon insulation plate welding production, transmission frame, transmission mechanism motor, each one of belt pulley size, V belt, pole electroplax pallet screw rod, metal (upper and watt frame, pole electroplax pallet, three-phase pole electroplax, extremely electric short-circuit board, electrolyte, KM4 soft start contactor, sensor.
Two, the formation of power cabinet is controlled: be made up of control power supply tank bracket, compensation condenser and mounting panel, building-out capacitor contactor and mounting panel, KM2, KM1 vacuum contactor and mounting panel, K2, K1, disconnecting link and mounting panel, master control DSP and control power supply box, miniature circuit breaker and mounting panel, KM4, KM3 vacuum contactor and mounting panel, fast acting fuse and mounting panel, three-phase alternating current reactance device and installation cross-arm etc.
Three, the formation of rotor-side variable frequency device speed governing cabinet: be by a funneling air channel, IGBT rotor power device, rectifier, IGBT inverter, noninductive capacitor, electrolytic capacitor, direct current reactor, programmable PLC control cabinet etc. are housed form and be arranged in speed governing tank bracket.Two pieces of A types and Type B fin-inserted radiator funneling air channel be equipped with, that all module components of rectifier, power device, inverter are all installed concentratedly above, funneling air channel 10 ￠ bolts are arranged on two channel-section steels, with 10 ￠ bolts, two channel-section steels are arranged on the middle cross-arm in tank bracket both sides again, funneling air channel top outlet inlet is strong air-cooler, and strong air-cooler is arranged on tank bracket top cover.
The operation principle of high-frequency IGBT rotor frequency changer governing system:
The operation principle of Liquid soft start unit: this Liquid soft start unit is that specialty is for high-tension winding formula electric motor starting, draw from the power supply of rotor three-phase connection box, through KM4 soft start contactor, send enabled instruction by DSP master control and make the adhesive of KM4 soft start contactor, through transmission mechanism motor, transmission three-phase pole electroplax declines gradually, by electrolyte, resistance value is diminished gradually, when the rotating speed of motor also rises to maximum speed thereupon, KM4 soft start contactor release electric motor starting is complete, this device is the feature according to mechanical load, automatic change starting resistance, regulate detent torque, realize level and smooth, electrodeless continuous startup, starting current is less than 1.2 times of Rated motor electric current, detent torque heavy motor starts steadily, start-up time, 0-60 was adjustable for second.And when IGBT rotor-side variable frequency device failure system is bypassed, this Liquid soft start unit can self-return to independent starter motor state continuously again, separate completely with rotor-side variable frequency device and work alone.To device start safety, system is become without impact to motor, electrical network and factory.
the operation principle of the soft bypass of system:this governing system devises a set of soft bypath system especially, when DSP detects that rotor-side variable frequency device breaks down suddenly, sending instruction by DSP master control makes KM1 and KM3 contactor discharge governing system bypass, make the adhesive of KM4 contactor simultaneously, to be moved out of portion of electrical current has instead arrived on aqueous water resistance, by water resistance from the basis of rotor-side variable frequency device fault speed stage, current of electric is raised to gradually Rated motor electric current (it is adjustable for second that transition time is about 0-60) motor to be also upgraded to and to define soft bypass functionality at full speed, now KM4 contactor discharges KM2 contactor adhesive short circuit rotor output, motor has transferred (power frequency) operation at full speed to, the primary cut-out second class protection stop jumping of motor will be made to cause stopping production because of impulse current, ensure that fail safe and the stability of production.
the operation principle of rectifier:high-tension winding formula rotor terminal box three-phase alternating current out-put supply, through Liquid soft start unit by after electric motor starting, KM4 soft start contactor discharges, rotor three-phase alternating-current supply directly delivers to three-phase rectifier, by rectifier, after rectification, the three-phase alternating-current supply of rotor is transformed into Voltage pulsating direct-current supply and exports.
the principle of high-frequency I GBT rotor power device:high-frequency I GBT rotor power device adopts IGBT module element, to rotor power supply, DC power supply after being rectified, sent instructions by rotor power device master control DSP, the time ratio making the IGBT turn-on and turn-off cycle is driven by IGBT, change motor rotor frequency, change the rotating speed of motor, IGBT does periodically turn-on and turn-off action, when IGBT constant conduction, rotor electric current, voltage by IGBT via the short circuit of direct current current-limiting reactor, its rotor frequency rises in time, and now the rotating speed of motor also rises to maximum speed thereupon.When IGBT continues to turn off, by the slip power that rotor part is moved out of, be all added on IGBT active inverter, after being converted to three-phase alternating-current supply by active inverter, feed back to motor stator to add winding and be recovered, now the rotating speed of motor also drops to minimum speed thereupon.
the funneling flue radiator principle of high-frequency IGBT rotor frequency changer:all modular component of the rectifier of high-frequency IGBT rotor frequency changer core, power device, inverter are all installed concentratedly on the funneling air duct radiation sheet that design is unique.That the metal base plate of the modules such as rectifier module, power device IGBT module and inverter IGBT is directly bonded in spreader surface, cooling blower is just for the fin cooling in air channel, all modules are installed concentratedly in spreader surface, therefore good cooling results, not easily the tired dust of collection causes creepage.Modules all is in addition arranged on the outside of radiator, and to changing module and safeguarding fast very convenient, this technology substantially increases fail safe, the reliability and stability of product.
high-frequency IGBT rotor frequency changer inverse envelope know-why:the blocking technology at IGBT inverter beta angle, β angle in active inverter is a parameter of inverter, also inverse envelope is, inverse envelope excursion is larger, cause that harmonic current is larger, speed adjustable range is narrower, power factor is lower, antijamming capability is poorer, fault etc. is overturned in easy inversion, above defect depends on that the size of inverse envelope determined completely.Traditional active inverter adopts SCR controllable silicon to make, and being transformable because the β angle of SCR in active inverter is 45-150 °, is therefore to carry out the blockade to inverter beta angle.The present invention devises the β angle automatic sealing package lock technology of specialty for IGBT in active inverter control software design, in addition because its β angle of performance advantage of IGBT itself can not parameter, therefore the β angle of the active inverter of this technology is 0 °, so the harmonic current of this high-frequency IGBT rotor frequency changer is less than 3%, speed adjustable range is greater than 0.96 up to 20%-100%, power factor, antijamming capability is strong, inversion can never overturn the crucial advantageous characteristic such as fault.
rotor-side variable frequency device synchronous signal processor principle:the technology of the ASIC software control synchronous signal processor of independent research, when synchronizing signal breaks down, this control software design signal processor can exchange the voltage signal adding winding in motor stator for automatically, solve inverter and overturn the problems such as fault, improve antijamming capability and multiplex digital servo-control and automatically join equal function.Also overcome the shortcomings such as traditional phase-shifting trigger requires strictly trigger impulse and commutation, pulse moving range large, poor anti jamming capability, easily inversion are overturned simultaneously.
as follows in order to illustrate further:iGBT does periodically turn-on and turn-off action, when rotor power device IGBT constant conduction, motor rotor electric current is by IGBT via current limiting reactor short circuit (reactor is connected on the output of rectifier), and its current value rises in time, and now the rotating speed of motor also rises thereupon.When rotor power device IGBT turns off, the energy be stored in reactor makes the voltage at IGBT two ends raise, and through diode, capacitor is charged.Energy on capacitor is added to the active inverter be made up of 6 IGBT, and electric current is remapped into AC power, and after LC filter filtering, feed back to the additional winding of motor stator.If the IGBT of rotor power device continues to turn off, rotor current is rectified and is all added to inverter loop afterwards, and feed back to the additional winding of motor stator, at this moment motor will have minimum rotating speed (minimum speed revolution value is determined by the output frequency of rotor power device and the additional winding regulation voltage data etc. of stator); When changing the frequency K(IGBT conducting of rotor power device and the ratio turning off cycle time) time, the output frequency of rotor power device can be changed, namely change the rotating speed of motor.If the IGBT constant conduction of rotor power device, then the output frequency of rotor power device reaches maximum (its size is decided by the size of load torque) motor speed for the highest; This method is on the one hand when changing the output frequency of rotor power device, change the rotating speed of motor, on the other hand by the slip energy of inverter by motor, feed back to the additional winding recycling of motor stator, or high-voltage electric machine stator recycling delivered to again by the step-up transformer feeding back to outside after boosting, reaches maximum energy-saving object.
Claims (6)
1. a high-frequency IGBT rotor frequency changer governing system, comprise Liquid soft start unit, control supply unit and speed regulating device, it is characterized in that: Liquid soft start unit independence Automatic continuous starts feedback wound three-phase asynchronous motor in high pressure, according to the feature of mechanical load, automatically change starting resistance and regulate detent torque; Speed regulating device adopt high-frequency IGBT rotor frequency changer, and high-frequency IGBT rotor frequency changer comprises rotor power device, active inverter and rectifier, and high-frequency IGBT rotor frequency changer is made up of IGBT module element; The Double-number DSP that speed regulating device control system adopts transmission to control and optical fibre control system, speed regulating device systems soft ware has digital filtering, software watchdog, software redundancy and software protection function.
2. high-frequency IGBT rotor frequency changer governing system according to claim 1, is characterized in that: speed regulating device are provided with soft bypath system.
3. high-frequency IGBT rotor frequency changer governing system according to claim 1, is characterized in that: the rotor power device of high-frequency IGBT rotor frequency changer, active inverter and rectifier module are all installed concentratedly.
4. high-frequency IGBT rotor frequency changer governing system according to claim 1, is characterized in that: the rotor power device of high-frequency IGBT rotor frequency changer, active inverter and rectifier module are arranged on funneling air duct radiation sheet.
5. high-frequency IGBT rotor frequency changer governing system according to claim 1, is characterized in that: the high-frequency IGBT rotor frequency changer of speed regulating device adopts IGBT inverter beta angle blocking technology.
6. high-frequency IGBT rotor frequency changer governing system according to claim 1, is characterized in that: the high-frequency IGBT rotor frequency changer of speed regulating device adopts the technology of synchronous signal processor.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310129106.7A CN103219943B (en) | 2013-04-15 | 2013-04-15 | High-frequency IGBT rotor frequency changer governing system |
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| CN201310129106.7A CN103219943B (en) | 2013-04-15 | 2013-04-15 | High-frequency IGBT rotor frequency changer governing system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105281609A (en) * | 2015-10-23 | 2016-01-27 | 首钢京唐钢铁联合有限责任公司 | Control system and control method for external bypass running of soft starter |
| CN106227099A (en) * | 2016-08-25 | 2016-12-14 | 西北工业大学 | A kind of cooperative control system of double winding permagnetic synchronous motor |
| CN109510513A (en) * | 2018-07-18 | 2019-03-22 | 上海锐机电有限公司 | A kind of side pushes away big function equipment Soft Starting System |
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| JPH01177895A (en) * | 1988-01-04 | 1989-07-14 | Toshiba Corp | Controller for induction motor |
| CN2834012Y (en) * | 2005-01-25 | 2006-11-01 | 上海南征电子电气成套有限公司 | IGBT-based chopping speed regulator |
| CN101217260A (en) * | 2008-01-18 | 2008-07-09 | 张振武 | A slip control digital intelligent speed regulation and system of motor without speed transducer |
| CN201222718Y (en) * | 2008-06-03 | 2009-04-15 | 广东华拿东方能源有限公司 | Intelligent double-control chopping type medium-pressure motor speed-regulating device |
| CN201733239U (en) * | 2010-05-05 | 2011-02-02 | 上海南征电子电气成套有限公司 | High-voltage frequency converter with over-current shunting device |
| CN202444465U (en) * | 2012-02-24 | 2012-09-19 | 四川极度电控系统制造有限责任公司 | Frequency conversion speed regulating system of motor rotor |
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2013
- 2013-04-15 CN CN201310129106.7A patent/CN103219943B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01177895A (en) * | 1988-01-04 | 1989-07-14 | Toshiba Corp | Controller for induction motor |
| CN2834012Y (en) * | 2005-01-25 | 2006-11-01 | 上海南征电子电气成套有限公司 | IGBT-based chopping speed regulator |
| CN101217260A (en) * | 2008-01-18 | 2008-07-09 | 张振武 | A slip control digital intelligent speed regulation and system of motor without speed transducer |
| CN201222718Y (en) * | 2008-06-03 | 2009-04-15 | 广东华拿东方能源有限公司 | Intelligent double-control chopping type medium-pressure motor speed-regulating device |
| CN201733239U (en) * | 2010-05-05 | 2011-02-02 | 上海南征电子电气成套有限公司 | High-voltage frequency converter with over-current shunting device |
| CN202444465U (en) * | 2012-02-24 | 2012-09-19 | 四川极度电控系统制造有限责任公司 | Frequency conversion speed regulating system of motor rotor |
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