CN103595266A - Explosion-proof intrinsically safe variable-frequency drive for mining - Google Patents
Explosion-proof intrinsically safe variable-frequency drive for mining Download PDFInfo
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- CN103595266A CN103595266A CN201310588267.2A CN201310588267A CN103595266A CN 103595266 A CN103595266 A CN 103595266A CN 201310588267 A CN201310588267 A CN 201310588267A CN 103595266 A CN103595266 A CN 103595266A
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Abstract
The invention discloses an explosion-proof intrinsically safe variable-frequency drive for mining. The explosion-proof intrinsically safe variable-frequency drive comprises a rectifier and an inverter. The rectifier comprises a filter unit, a pre-charging unit, a rectification control unit, a power unit, a six-path PWM drive unit, a high-voltage support capacitor unit assembly and a rectification display/keyboard. The inverter comprises an inverting control unit, a power unit, a six-path PWM drive unit and an inverting display/keyboard. The explosion-proof intrinsically safe variable-frequency drive further comprises a power interface board, wherein the power interface board is composed of a rectification power interface board and an inverting power interface board and comprises a detection circuit module. An actual direct-current voltage value detected by a detection circuit is compared with a reference direct-current voltage value by the detection circuit, if the direct-current voltage value is larger than the reference direct-current voltage value and not within a range, it is indicted that a system works in an inverting state, a drive pulse signal is transmitted to a rectification-side power switch triode by a control system, and the power switch triode is normally switched on or switched off; otherwise, the rectification-side power switch triode is in a turn-off state. The explosion-proof intrinsically safe variable-frequency drive alleviates equipment heat dissipation difficulty and improves heat dissipation performance.
Description
Technical field
The invention belongs to converter technology field, relate in particular to a kind of mine flameproof and intrinsic safety type frequency converter.
Background technology
Mine flameproof and intrinsic safety type frequency converter is mainly used in ore deposit underground work, because its power is larger, during normal operation, will produce a large amount of heats.Because mine flameproof and intrinsic safety type frequency converter has requirement of explosion proof, whole equipment is sealed in explosion-proof cavity, be unfavorable for carrying out with the external world exchange of heat, if so do not consider its heat dissipation problem, temperature in explosion-proof chamber can surpass the frequency converter needed temperature environment that works, cause power device to burn, or affect the inefficacy of control system electronic device.In equipment running process, power device need to complete high-frequency switch and turn-on action, and the switching loss of its generation and conduction loss are finally converted into thermal release in running environment.Therefore power device is topmost heater element in big-power transducer.And in the switching loss of power device, switching loss is occupied absolute proportion.
At present, for the frequency converter of traditional four quadrant running, the long-time four quadrant running of system, rectification side and inversion side power device are carrying out HF switch action always, and switching loss has increased the heat radiation difficulty of equipment undoubtedly.For assurance equipment normal operation, generally from mechanical mechanism, improve and optimize heat radiation and ventilation scheme, but due to the particularity of mine flameproof and intrinsic safety type frequency converter operational environment, so room for improvement is limited.
Summary of the invention
The deficiency existing for prior art, technical problem to be solved by this invention is, a kind of two-way flow that reduces power device switching frequency, not only can guarantee energy is provided, and fundamentally greatly reduce the gross calorific power of equipment, the heat radiation difficulty of having alleviated equipment improves heat dispersion, effectively improves the frequency converter mine flameproof and intrinsic safety type frequency converter in useful life
For solving the problems of the technologies described above, the technical solution used in the present invention is: a kind of mine flameproof and intrinsic safety type frequency converter, comprise rectifier and inverter, described rectifier comprises the formations such as a filter unit, a precharge unit, a rectification control unit, power cell ,Yi six road PWM driver elements, one group of high pressure Support Capacitor unit and a rectification demonstration/keyboard; Described inverter comprises that an inversion control unit, power cell ,Yi six road PWM driver elements and an inversion demonstration/keyboard form; Also comprise a power interface oralia being formed by rectified power interface board and inverter power interface board, described power interface oralia comprises testing circuit module, testing circuit is by the actual DC magnitude of voltage detecting with reference to DC voltage value comparison, when detection direct voltage is greater than with reference to direct voltage and goes beyond the scope, decision-making system works in inverter mode, control system is sent out drive pulse signal to rectification side power switch pipe, power switch pipe normal switch; Otherwise rectification side power switch pipe is in off state.
Above-mentioned mine flameproof and intrinsic safety type frequency converter, described power interface oralia comprises current detection module, voltage detection module and temperature detecting module.
The advantage of mine flameproof and intrinsic safety type frequency converter of the present invention is: four-quadrant frequency converter has advantages of can make energy in bidirectional flow, by load end energy feedback to electrical network end, really realized green energy conservation.But, at many scenes of mine-used frequency-converter operation, do not need load regularly to electrical network feedback electric energy.For this situation, the present invention has added interruption control model in the control algolithm of mine flameproof and intrinsic safety type frequency converter.When system runs on described pattern lower time, the actual DC magnitude of voltage that control system detects and comparing with reference to DC voltage value.When actual DC voltage with reference to the difference of direct voltage in certain scope, devices illustrated works in rectification state, control system sends out drive pulse signal to frequency converter rectification side power switch pipe, the power switch pipe of rectification side is so in off state, the switching loss of the power switch pipe of now rectification side is zero, the heating situation of the equipment of alleviation; When actual DC voltage is higher than with reference to direct voltage and exceed certain boundary, now illustrate that load end energy is to the feedback of electrical network end, decision-making system works in inverter mode, control system is sent out drive pulse signal to rectification side power switch pipe so, rectification side power switch pipe normally turns on and off, by the energy feedback of load end to electrical network.The present invention not only can guarantee the two-way flow of energy, and fundamentally greatly reduces the gross calorific power of equipment, has alleviated the heat radiation difficulty of equipment.
Accompanying drawing explanation
Fig. 1 is the electric current structure principle chart of four-quadrant frequency converter.
Fig. 2 is the structural representation of four-quadrant frequency converter.
Fig. 3 is workflow diagram of the present invention.
Embodiment
Below in conjunction with drawings and the specific embodiments, the present invention is described in further details;
As shown in Figure 1, comprising: line voltage 1, input filter unit 2, precharge unit 3, rectifier power cell 4, high voltage direct current Support Capacitor unit 5, inversion side power cell 6, motor 7, rectification side control unit 8, rectification side demonstration/keyboard 9, rectification side PWM driver element 10, inversion side control unit 11, inversion side demonstration/keyboard 12, inversion side PWM driver element 13.
A four-quadrant frequency converter comprises rectifier and inverter, described rectifier comprises the formations such as a filter unit (generally adopting LCL, i.e. reactor-ac filter electric capacity-reactor), a precharge unit (comprising pre-charge resistance, contactor), a rectification control unit (master control borad, rectified power interface board, Switching Power Supply), a power cell (IGBT) ,Liu road PWM driver element (drive circuit board, gate pole plate), one group of high pressure Support Capacitor unit (capacitance group, DC master row) and a rectification demonstration/keyboard; Described inverter comprises the formations such as an inversion control unit (master control borad, inverter power interface board, Switching Power Supply), a power cell (IGBT) ,Liu road PWM driver element (drive circuit board, gate pole plate) and an inversion demonstration/keyboard; In addition, also comprise the heat abstractor (as radiator, heat pipe etc.) that a rectification IGBT and inversion IGBT are shared.Rectified power interface board and inverter power interface board general designation power interface oralia wherein, power interface oralia comprises the measuring abilities such as current detecting, voltage detecting, temperature detection, and the defencive function such as overcurrent, overvoltage, excess temperature, overload.
As shown in Figure 2, for four-quadrant frequency converter product structure, comprise: the first input reactance device, ac filter electric capacity, the second input reactance device, contactor, pre-charge resistance, three-phase input copper bar, rectifier drive plate, rectifier gate pole plate and IGBT, high voltage direct current Support Capacitor group, DC master row, rectification side power interface oralia, rectifier master control borad, rectifier demonstration/keyboard, rectifier switch power supply, inverter switching device power supply, inverter demonstration/keyboard, inverter master control borad, inverter power interface board, inverter gate plate and IGBT, Driven by inverter plate, three-phase output copper bar and heat abstractor.
As shown in Figure 3, comprising: detection actual DC electricity Ya≤with reference to direct voltage 1, inverter mode 2, rectification side PWM driving pulse 3, rectification state 4, rectification side is without pwm pulse 5.
Testing circuit is by the actual DC magnitude of voltage detecting with reference to DC voltage value comparison, when detection direct voltage is greater than with reference to direct voltage and goes beyond the scope, decision-making system works in inverter mode, control system is sent out drive pulse signal to rectification side power switch pipe, power switch pipe normal switch; Otherwise rectification side power switch pipe is in off state.
Certainly, above-mentioned explanation is not limitation of the present invention, and the present invention is also not limited to above-mentioned giving an example; those skilled in the art; in essential scope of the present invention, the variation of making, remodeling, interpolation or replacement, all should belong to protection scope of the present invention.
Claims (2)
1. a mine flameproof and intrinsic safety type frequency converter, comprise rectifier and inverter, described rectifier comprises the formations such as a filter unit, a precharge unit, a rectification control unit, power cell ,Yi six road PWM driver elements, one group of high pressure Support Capacitor unit and a rectification demonstration/keyboard; Described inverter comprises that an inversion control unit, power cell ,Yi six road PWM driver elements and an inversion demonstration/keyboard form; Also comprise a power interface oralia being formed by rectified power interface board and inverter power interface board, described power interface oralia comprises testing circuit module, testing circuit is by the actual DC magnitude of voltage detecting with reference to DC voltage value comparison, when detection direct voltage is greater than with reference to direct voltage and goes beyond the scope, decision-making system works in inverter mode, control system is sent out drive pulse signal to rectification side power switch pipe, power switch pipe normal switch; Otherwise rectification side power switch pipe is in off state.
2. mine flameproof and intrinsic safety type frequency converter according to claim 1, is characterized in that: described power interface oralia comprises current detection module, voltage detection module and temperature detecting module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310588267.2A CN103595266A (en) | 2013-11-21 | 2013-11-21 | Explosion-proof intrinsically safe variable-frequency drive for mining |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310588267.2A CN103595266A (en) | 2013-11-21 | 2013-11-21 | Explosion-proof intrinsically safe variable-frequency drive for mining |
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| CN103595266A true CN103595266A (en) | 2014-02-19 |
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| CN201310588267.2A Pending CN103595266A (en) | 2013-11-21 | 2013-11-21 | Explosion-proof intrinsically safe variable-frequency drive for mining |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104061180A (en) * | 2014-06-18 | 2014-09-24 | 台安科技(无锡)有限公司 | Fan PWM (Pulse Width Modulation) speed regulation energy-saving control system and control method with temperature prediction |
| CN104201872A (en) * | 2014-07-24 | 2014-12-10 | 南阳防爆集团电气系统工程有限公司 | Topology circuit for mining frequency converter |
| CN104836454A (en) * | 2015-04-09 | 2015-08-12 | 浙江新富凌电气股份有限公司 | Frequency converter with touch screen |
| CN111293945A (en) * | 2020-02-27 | 2020-06-16 | 山东欧瑞安电气有限公司 | Servo press driving system |
| CN113037148A (en) * | 2019-12-24 | 2021-06-25 | 中车永济电机有限公司 | Converter and traction drive system |
| CN114759525A (en) * | 2022-04-25 | 2022-07-15 | 山东博诚电气有限公司 | Protection method and device for mining explosion-proof and intrinsically safe combined frequency converter |
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| CN2938567Y (en) * | 2006-08-15 | 2007-08-22 | 唐山开诚电器有限责任公司 | Explosive-proof compatible safe four-quadrant frequency converter speed regulation system of digital mine hoist |
| CN101534091A (en) * | 2008-11-19 | 2009-09-16 | 范鑫焱 | Mine flameproof and intrinsic safety type variable frequency speed control device |
| CN102412735A (en) * | 2011-12-06 | 2012-04-11 | 中国煤炭科工集团太原研究院 | Control method used four-quadrant transducer |
| CN202721450U (en) * | 2012-05-29 | 2013-02-06 | 深圳市海浦蒙特科技有限公司 | Fully controllable energy feedback device |
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2013
- 2013-11-21 CN CN201310588267.2A patent/CN103595266A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN2938567Y (en) * | 2006-08-15 | 2007-08-22 | 唐山开诚电器有限责任公司 | Explosive-proof compatible safe four-quadrant frequency converter speed regulation system of digital mine hoist |
| CN101534091A (en) * | 2008-11-19 | 2009-09-16 | 范鑫焱 | Mine flameproof and intrinsic safety type variable frequency speed control device |
| CN102412735A (en) * | 2011-12-06 | 2012-04-11 | 中国煤炭科工集团太原研究院 | Control method used four-quadrant transducer |
| CN202721450U (en) * | 2012-05-29 | 2013-02-06 | 深圳市海浦蒙特科技有限公司 | Fully controllable energy feedback device |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104061180A (en) * | 2014-06-18 | 2014-09-24 | 台安科技(无锡)有限公司 | Fan PWM (Pulse Width Modulation) speed regulation energy-saving control system and control method with temperature prediction |
| CN104201872A (en) * | 2014-07-24 | 2014-12-10 | 南阳防爆集团电气系统工程有限公司 | Topology circuit for mining frequency converter |
| CN104836454A (en) * | 2015-04-09 | 2015-08-12 | 浙江新富凌电气股份有限公司 | Frequency converter with touch screen |
| CN113037148A (en) * | 2019-12-24 | 2021-06-25 | 中车永济电机有限公司 | Converter and traction drive system |
| CN113037148B (en) * | 2019-12-24 | 2022-07-19 | 中车永济电机有限公司 | Converter and traction drive system |
| CN111293945A (en) * | 2020-02-27 | 2020-06-16 | 山东欧瑞安电气有限公司 | Servo press driving system |
| CN114759525A (en) * | 2022-04-25 | 2022-07-15 | 山东博诚电气有限公司 | Protection method and device for mining explosion-proof and intrinsically safe combined frequency converter |
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