CN203136219U - Monitoring system of large-power parallel connected/series connected resonant intermediate frequency power supply - Google Patents
Monitoring system of large-power parallel connected/series connected resonant intermediate frequency power supply Download PDFInfo
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- CN203136219U CN203136219U CN 201320000224 CN201320000224U CN203136219U CN 203136219 U CN203136219 U CN 203136219U CN 201320000224 CN201320000224 CN 201320000224 CN 201320000224 U CN201320000224 U CN 201320000224U CN 203136219 U CN203136219 U CN 203136219U
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- power supply
- intermediate frequency
- frequency power
- heater
- sensor
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Abstract
The utility model discloses a monitoring system of a large-power parallel connected/series connected resonant intermediate frequency power supply. The monitoring system of the large-power parallel connected/series connected resonant intermediate frequency power supply is characterized in that a PLC control cabinet is connected with a touch screen HMI, is connected with the intermediate frequency power supply via an I/O module, and enables a signal to be converted by a D/A module and then to be inputted to the intermediate frequency power supply via an amplification drive circuit; the intermediate frequency power supply is connected with an induction furnace A, an induction furnace B, a current sensor, a voltage sensor, a frequency sensor, a temperature sensor and a pressure sensor, and enables a signal to be converted by an A/D module and then to be inputted to the PLC control cabinet. The monitoring system of the large-power parallel connected/series connected resonant intermediate frequency power supply is simple in system operation, and enables the labor intensity of workers to be released, the smelting processing automation level to be improved, the power control of furnace loads to be realized, the service lives of the furnaces and the metal smelting quality to be improved obviously and the dynamic and steady-state performances during the smelting process to be enhanced.
Description
Technical field
The utility model relates to a kind of high-power parallel connection, series resonance intermediate frequency power supply supervisory control system.
Background technology
High-power induction heating power has plurality of advantages such as firing rate is fast, workpiece is added evenly, adopts contactless heating, the automatic control of easy realization, in industry, have a wide range of applications, as be used for quenching in manufacturing industry and metallurgical industry, diathermanous, melting, insulation, soldering and sintering etc.Along with the continuous development of theories of induction heating and induction heating equipment, its application also enlarges thereupon, and range of application is more and more wider.But existing technology, because of system's inconvenient operation, unstable properties, automatization level is low, can't ensure the melting quality of metal.
Summary of the invention
For solving above-mentioned existing shortcoming, main purpose of the present utility model is to provide a kind of high-power parallel connection, series resonance intermediate frequency power supply supervisory control system of practicality, system is simple to operate, alleviated labor strength, improved the automatization level of melting processing, realized the control to the smelting furnace bearing power, the life-span of body of heater and the melting quality of metal increased significantly, strengthened fusion process dynamically and steady-state behaviour.
For reaching above-described purpose, a kind of high-power parallel connection of the present utility model, series resonance intermediate frequency power supply supervisory control system are taked following technical scheme:
A kind of high-power parallel connection, series resonance intermediate frequency power supply supervisory control system, comprise induction body of heater A, induction body of heater B, intermediate frequency power supply, PLC control cubicle and touch-screen HMI, it is characterized in that, described PLC control cubicle is connected with touch-screen HMI, the PLC control cubicle is connected with intermediate frequency power supply by the I/O module, the PLC control cubicle passes through signal to import intermediate frequency power supply through amplification driving circuit after the D/A module converts, described intermediate frequency power supply is connected with induction body of heater B with induction body of heater A, intermediate frequency power supply and current sensor, voltage sensor, frequency sensor, temperature sensor is connected with pressure sensor, and by the A/D module PLC control cubicle is imported in signal conversion back.
Described induction body of heater A and induction body of heater B are crucible, adopt refractory material to build up, the spiral induction coil of outside cover one deck.
Described intermediate frequency power supply is the power supply of induction body of heater by the mode of " AC-DC-AC ", and the electric current of intermediate frequency frequency of its output is between 300Hz～20KHz.
Adopt as above the utility model of technical scheme, have following beneficial effect:
System is simple to operate, has alleviated labor strength, has improved the automatization level of melting processing, has realized the control to the smelting furnace bearing power, and the life-span of body of heater and the melting quality of metal are increased significantly, strengthened fusion process dynamically and steady-state behaviour.
Description of drawings
Fig. 1 is system configuration schematic diagram of the present utility model.
Embodiment
In order to further specify the utility model, further describe below in conjunction with accompanying drawing:
As shown in Figure 1, a kind of high-power parallel connection of the present utility model, series resonance intermediate frequency power supply supervisory control system, comprise induction body of heater A, induction body of heater B, intermediate frequency power supply, PLC control cubicle and touch-screen HMI, touch-screen HMI is connected with the PLC control cubicle, the PLC control cubicle is connected with intermediate frequency power supply by the I/O module, the PLC control cubicle passes through signal to import intermediate frequency power supply through amplification driving circuit after the D/A module converts, intermediate frequency power supply is connected with induction body of heater B with induction body of heater A, intermediate frequency power supply and current sensor, voltage sensor, frequency sensor, temperature sensor is connected with pressure sensor, and by the A/D module PLC control cubicle is imported in signal conversion back.Induction body of heater A and induction body of heater B are crucible, the employing refractory material builds up, the spiral induction coil of outside cover one deck, metal charge fusion is placed in the crucible, when coil is logical when going up alternating current, the inside of metal charge produces eddy current effect and magnetic hysteresis loss and causes thermal effect under the effect of alternating magnetic field, thereby reaches the purpose of heating melting.Intermediate frequency power supply is the power supply of induction body of heater by the mode of " AC-DC-AC ", and the electric current of intermediate frequency frequency of its output is between 300Hz～20KHz, and it is the main chief component of heating system, is main monitored object.PLC is the core cell of whole system, and its function is to gather and finish the processing of all analog quantitys and digital quantity, is responsible for power and the heating process control of stove body temperature collection, intermediate frequency power supply, and realization is communicated by letter with host computer touch-screen HMI's.Touch-screen HMI is the monitor terminal of system's man-machine interaction, both running statuses of display system real-time and accurately, can revise the running parameter of system and equipment is assigned action command by touch-button again, can also be automatically warning message, historical record and the tendency information of system be deposited in the self-defining database.Induction heating power generally is made up of main circuit, control circuit and protective circuit thereof.Wherein main circuit comprises rectification circuit, filter circuit, inverter circuit, load circuit composition.The three-phase main-frequency electric current, becomes straight direct current and gives inverter behind the filter filtering through rectifier rectification, is converted to the needed electric current of intermediate frequency of load circuit by inverter again.Inverter circuit is output as load the energy directly is provided.When electric current of intermediate frequency heats workpiece by induction coil, can equivalence be an inductance and resistance, load be perception, and in order to improve the output frequency of power factor and inverter, the general method that adds building-out capacitor that adopts is operated on the resonance frequency compensation back loading.Different according to building-out capacitor and load coil connected mode, power inverse transformation circuit can be divided into parallel resonance formula and two kinds of forms of serial-resonant.The series-resonant inverting circuit, it is with building-out capacitor and the back load as inverter bridge of induction coil (substitutional resistance and inductance) series connection.Because the building-out capacitor value is bigger, can be similar to and think that the inverter input terminal voltage immobilizes.Alternately turn on and off controllable devices on the inverter and just can obtain the square-wave voltage of alternation at the output of inverter.Because switching loss is less when series inverter adopts suitable working method, thereby the operating frequency of relative broad range can be arranged.Just because of this reason, in the semiconductor high-frequency induction heating power, the series inverter scheme is subjected to more attention at present.In heating and deposite metal furnace charge process, because of factors such as variations in temperature and furnace charge dissolve, load equivalent parameter and natural resonance frequency are changed.For improve power-efficient should make series inverter always work in power factor close to or equal 1 quasi-resonance state, this will ask the output frequency of inverter can follow the variation of load natural frequency, to realize Zero Current Switch or the zero voltage switch of inversion device.The PWM frequency tracking method that the utility model adopts is sampled to the voltage current waveform of load, obtain phase difference between the voltage and current according to the position of zero crossing, the power factor that the system that obtains is real-time is regulated inverter operating frequency with this, promotes the power factor of induction furnace.
Claims (3)
1. high-power parallel connection, series resonance intermediate frequency power supply supervisory control system, comprise induction body of heater A, induction body of heater B, intermediate frequency power supply, PLC control cubicle and touch-screen HMI, it is characterized in that, described PLC control cubicle is connected with touch-screen HMI, the PLC control cubicle is connected with intermediate frequency power supply by the I/O module, the PLC control cubicle passes through signal to import intermediate frequency power supply through amplification driving circuit after the D/A module converts, described intermediate frequency power supply is connected with induction body of heater B with induction body of heater A, intermediate frequency power supply and current sensor, voltage sensor, frequency sensor, temperature sensor is connected with pressure sensor, and by the A/D module PLC control cubicle is imported in signal conversion back.
2. a kind of high-power parallel connection according to claim 1, series resonance intermediate frequency power supply supervisory control system is characterized in that, described induction body of heater A and induction body of heater B are crucible, adopt refractory material to build up, the spiral induction coil of outside cover one deck.
3. a kind of high-power parallel connection according to claim 1, series resonance intermediate frequency power supply supervisory control system, it is characterized in that, described intermediate frequency power supply is the power supply of induction body of heater by the mode of " AC-DC-AC ", and the electric current of intermediate frequency frequency of its output is between 300Hz～20KHz.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320000224 CN203136219U (en) | 2013-01-04 | 2013-01-04 | Monitoring system of large-power parallel connected/series connected resonant intermediate frequency power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320000224 CN203136219U (en) | 2013-01-04 | 2013-01-04 | Monitoring system of large-power parallel connected/series connected resonant intermediate frequency power supply |
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| CN203136219U true CN203136219U (en) | 2013-08-14 |
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| CN 201320000224 Expired - Fee Related CN203136219U (en) | 2013-01-04 | 2013-01-04 | Monitoring system of large-power parallel connected/series connected resonant intermediate frequency power supply |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104570912A (en) * | 2014-12-30 | 2015-04-29 | 朱兴发 | Full-automatic smelting control system and control method for polycrystalline silicon |
| CN104638763A (en) * | 2015-01-07 | 2015-05-20 | 潍坊市金华信电炉制造有限公司 | Remote monitoring device of high-power medium-frequency power supply |
| CN105307293A (en) * | 2015-11-25 | 2016-02-03 | 王志成 | Electric cooker heating circuit powered by 220V AC voltage |
| CN105323875A (en) * | 2015-11-25 | 2016-02-10 | 王志成 | 12V-24V direct current voltage-powered electric cooker heating circuit |
| CN107202916A (en) * | 2017-05-15 | 2017-09-26 | 国网天津市电力公司 | A kind of series resonance test system monitoring device |
| CN117348499A (en) * | 2023-11-24 | 2024-01-05 | 山东鼎晟电气科技有限公司 | Remote regulation and control system based on series resonance intermediate frequency induction smelting furnace |
-
2013
- 2013-01-04 CN CN 201320000224 patent/CN203136219U/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104570912A (en) * | 2014-12-30 | 2015-04-29 | 朱兴发 | Full-automatic smelting control system and control method for polycrystalline silicon |
| CN104638763A (en) * | 2015-01-07 | 2015-05-20 | 潍坊市金华信电炉制造有限公司 | Remote monitoring device of high-power medium-frequency power supply |
| CN105307293A (en) * | 2015-11-25 | 2016-02-03 | 王志成 | Electric cooker heating circuit powered by 220V AC voltage |
| CN105323875A (en) * | 2015-11-25 | 2016-02-10 | 王志成 | 12V-24V direct current voltage-powered electric cooker heating circuit |
| CN105307293B (en) * | 2015-11-25 | 2018-01-30 | 王志成 | The electric rice cooker heated circuit of 220V AC voltage power supply |
| CN105323875B (en) * | 2015-11-25 | 2018-01-30 | 王志成 | The electric rice cooker heated circuit of 12V~24V DC-voltage supplies |
| CN107202916A (en) * | 2017-05-15 | 2017-09-26 | 国网天津市电力公司 | A kind of series resonance test system monitoring device |
| CN117348499A (en) * | 2023-11-24 | 2024-01-05 | 山东鼎晟电气科技有限公司 | Remote regulation and control system based on series resonance intermediate frequency induction smelting furnace |
| CN117348499B (en) * | 2023-11-24 | 2024-02-27 | 山东鼎晟电气科技有限公司 | Remote regulation and control system based on series resonance intermediate frequency induction smelting furnace |
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| C14 | Grant of patent or utility model | ||
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| DD01 | Delivery of document by public notice |
Addressee: Luo Laiwei Document name: Notice of conformity |
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| DD01 | Delivery of document by public notice | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130814 Termination date: 20210104 |
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| CF01 | Termination of patent right due to non-payment of annual fee |