CN112583286B - A method for controlling the freewheeling tube of high-power induction melting furnace - Google Patents
A method for controlling the freewheeling tube of high-power induction melting furnace Download PDFInfo
- Publication number
- CN112583286B CN112583286B CN202011479578.1A CN202011479578A CN112583286B CN 112583286 B CN112583286 B CN 112583286B CN 202011479578 A CN202011479578 A CN 202011479578A CN 112583286 B CN112583286 B CN 112583286B
- Authority
- CN
- China
- Prior art keywords
- pin
- resistor
- unit
- capacitor
- output
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 230000006698 induction Effects 0.000 title claims abstract description 18
- 238000002844 melting Methods 0.000 title claims abstract description 18
- 230000008018 melting Effects 0.000 title claims abstract description 18
- 238000000034 method Methods 0.000 title claims abstract description 17
- 239000003990 capacitor Substances 0.000 claims description 55
- 238000007493 shaping process Methods 0.000 claims description 22
- 230000003321 amplification Effects 0.000 claims description 13
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 13
- 230000005669 field effect Effects 0.000 claims description 12
- 238000005070 sampling Methods 0.000 claims description 11
- 230000010355 oscillation Effects 0.000 claims description 5
- 230000000087 stabilizing effect Effects 0.000 claims description 5
- 230000001960 triggered effect Effects 0.000 claims description 4
- 238000001914 filtration Methods 0.000 claims description 3
- 230000009977 dual effect Effects 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of AC power input into DC power output; Conversion of DC power input into AC power output
- H02M7/02—Conversion of AC power input into DC power output without possibility of reversal
- H02M7/04—Conversion of AC power input into DC power output without possibility of reversal by static converters
- H02M7/12—Conversion of AC power input into DC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/21—Conversion of AC power input into DC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/217—Conversion of AC power input into DC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M7/219—Conversion of AC power input into DC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only in a bridge configuration
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Furnace Details (AREA)
Abstract
Description
技术领域Technical field
本发明涉及一种大功率感应熔化炉续流管控制方法，属于熔化炉设备控制技术领域。The invention relates to a method for controlling a freewheeling tube of a high-power induction melting furnace and belongs to the technical field of melting furnace equipment control.
背景技术Background technique
随着经济的发展，大功率高效节能的感应熔化炉需求量逐渐增多，对于节能的要求也越来越高，其中，提高感应炉的熔化炉炉体电压减少铜损，是行之有效的方法。目前，大部分厂家都采用提高进线电压或采用整流桥串联的方式来提高电压。With the development of the economy, the demand for high-power, high-efficiency and energy-saving induction melting furnaces is gradually increasing, and the requirements for energy saving are also getting higher and higher. Among them, increasing the voltage of the melting furnace body of the induction furnace to reduce copper loss is an effective method . At present, most manufacturers increase the incoming line voltage or use a rectifier bridge in series to increase the voltage.
若采用整流桥串联以提高电压这种方式，从便于感应炉顺利启动角度讲，只需增加一只续流管。然而，要考虑故障发生时，保护KK型快速晶闸管，则需增加两只续流管。这样就产生了矛盾，同时接上两只续流管，会产生启动困难的问题，因此，现有技术没有很好的解决方案。If the rectifier bridge is connected in series to increase the voltage, from the perspective of facilitating the smooth startup of the induction furnace, only one freewheeling tube is needed. However, to protect the KK-type fast thyristor when a fault occurs, two freewheeling tubes need to be added. This creates a contradiction. Connecting two freewheeling tubes at the same time will cause difficulty in starting. Therefore, there is no good solution in the existing technology.
发明内容Contents of the invention
本发明的目的在于克服现有技术中的不足，提供一种大功率感应熔化炉续流管控制方法。The purpose of the present invention is to overcome the deficiencies in the prior art and provide a method for controlling the freewheeling tube of a high-power induction melting furnace.
为达到上述目的，本发明所采用的技术手段是：一种大功率感应熔化炉续流管控制方法，在续流管控制电路中，在高端整流桥回路中连接续流管，在低端整流桥回路中连接KK型快速晶闸管，开机时，高端整流桥回路中续流管一直接入，低端整流桥回路中的KK型快速晶闸管由触发电路控制，在中频电压升高至设定值时，经触发电路产生触发脉冲触发，KK型快速晶闸管导通介入主电路，起到保护整流管的作用。In order to achieve the above object, the technical means adopted by the present invention are: a method for controlling the freewheeling tube of a high-power induction melting furnace. In the freewheeling tube control circuit, the freewheeling tube is connected to the high-end rectifier bridge circuit, and the freewheeling tube is connected to the low-end rectifier. The KK-type fast thyristor is connected to the bridge circuit. When starting up, the freewheeling tube in the high-end rectifier bridge circuit is always connected. The KK-type fast thyristor in the low-end rectifier bridge circuit is controlled by the trigger circuit. When the intermediate frequency voltage rises to the set value , triggered by the trigger pulse generated by the trigger circuit, the KK type fast thyristor conducts and intervenes in the main circuit to protect the rectifier.
进一步的，所述续流管控制电路包括整流单元、比较器单元、振荡器单元、脉冲整形单元、脉冲放大单元与触发单元，其中整流单元进行电压采样，输出连接比较器单元，比较器单元为双电压比较器，比较器单元输出至振荡器单元、脉冲整形单元，由脉冲整形单元整形后输出至脉冲放大单元，由脉冲放大单元放大后输出至触发单元，触发单元触发KK型快速晶闸管。Further, the freewheeling tube control circuit includes a rectifier unit, a comparator unit, an oscillator unit, a pulse shaping unit, a pulse amplification unit and a trigger unit. The rectifier unit performs voltage sampling, and the output is connected to the comparator unit. The comparator unit is Dual voltage comparator, the comparator unit outputs to the oscillator unit and pulse shaping unit. The pulse shaping unit shapes and outputs to the pulse amplification unit. The pulse amplification unit amplifies and outputs to the trigger unit. The trigger unit triggers the KK type fast thyristor.
更进一步的，所述整流单元包括电压采样变压器，与电压采样变压器连接的稳压电阻R1、R2，限流电阻R3，稳压管DW1，电容C1和极性电容E1滤波，经电阻R4输出。Furthermore, the rectification unit includes a voltage sampling transformer, voltage stabilizing resistors R1 and R2 connected to the voltage sampling transformer, current limiting resistor R3, voltage stabilizing tube DW1, capacitor C1 and polarity capacitor E1 for filtering, and output through resistor R4.
更进一步的，所述比较器单元的U1A同向输入脚连接电阻R4，U1A反向输入脚连接可调电阻W1，可调电阻W1一端接正电源，另一端通过电阻R6接地，U1A同向输入脚通过电阻R5连接U1A输出脚，U1A输出脚连接电阻R7、电阻R8的一端，以及极性电容E2的负极，电阻R7的另一端和极性电容E2的正极接正电源，电阻R8的另一端连接电阻R9和极性电容E3的正极，极性电容E3的负极接地，电阻R9的另一端接U1B同向输入脚，U1B反向输入脚连接可调电阻W2，可调电阻W2一端接正向电源，另一端通过电阻R11接地，U1B同向输入脚通过电阻R10连接U1B输出脚，U1B输出脚连接电阻R12的一端，以及极性电容E4的负极，电阻R12的另一端以及极性电容E4的正极接正电源，U1B输出脚控制振荡器单元及脉冲整形单元的复位端，根据需要设定炉体电压达到某一值才发出触发脉冲，把KK型快速晶闸管触发开通接入主电路，起到在故障时保护续流管的作用。Furthermore, the U1A non-inverting input pin of the comparator unit is connected to the resistor R4, and the U1A reverse input pin is connected to the adjustable resistor W1. One end of the adjustable resistor W1 is connected to the positive power supply, and the other end is connected to the ground through the resistor R6. U1A is in the same direction input. The U1A output pin is connected to the U1A output pin through the resistor R5. The U1A output pin is connected to the resistor R7, one end of the resistor R8, and the negative electrode of the polar capacitor E2. The other end of the resistor R7 and the positive electrode of the polar capacitor E2 are connected to the positive power supply. The other end of the resistor R8 Connect the positive pole of resistor R9 and polar capacitor E3. The negative pole of polar capacitor E3 is connected to ground. The other end of resistor R9 is connected to the same input pin of U1B. The reverse input pin of U1B is connected to the adjustable resistor W2. One end of the adjustable resistor W2 is connected to the forward direction. Power supply, the other end is connected to ground through resistor R11, U1B non-directional input pin is connected to U1B output pin through resistor R10, U1B output pin is connected to one end of resistor R12, and the negative electrode of polar capacitor E4, the other end of resistor R12 and polar capacitor E4 The positive pole is connected to the positive power supply, and the U1B output pin controls the reset end of the oscillator unit and the pulse shaping unit. The furnace body voltage is set to reach a certain value before the trigger pulse is sent out as needed. The KK type fast thyristor is triggered and connected to the main circuit to achieve the desired effect. It plays the role of protecting the freewheeling tube in case of failure.
更进一步的，所述比较器单元的U1A和U1B采用LM393集成电路。Furthermore, U1A and U1B of the comparator unit adopt LM393 integrated circuit.
更进一步的，所述振荡器单元包括U2B的复位脚连接U1B输出脚，U2B的控制电压脚通过电容C4接地，U2B的触发脚、阀值脚共点，通过并联的电容C2、电容C3接地，U2B的放电脚接电阻R13、R14，电阻R13的另一端接正电源，电阻R14的另一端接U2B的阀值脚，由U2B、电容C2、电容C3、电阻R13、R14组成振荡器，振荡器脉冲率为2KHz，振荡脉冲由U2B输出脚输出。Furthermore, the oscillator unit includes the reset pin of U2B connected to the output pin of U1B, the control voltage pin of U2B is grounded through capacitor C4, the trigger pin and threshold pin of U2B are at the same point, and are grounded through parallel capacitors C2 and C3. The discharge pin of U2B is connected to resistors R13 and R14. The other end of resistor R13 is connected to the positive power supply. The other end of resistor R14 is connected to the threshold pin of U2B. An oscillator is composed of U2B, capacitor C2, capacitor C3, and resistors R13 and R14. The pulse rate is 2KHz, and the oscillation pulse is output from the U2B output pin.
更进一步的，所述脉冲整形单元包括U2A的复位脚连接U1B输出脚，U2A的触发脚通过电容C5连接U2B输出脚，并通过并联的电阻R15、二极管D1连接正电源，U2A的控制电压脚通过电容C6接地，U2A的放电脚、阀值脚共点，并通过电容C7接地、通过电阻R16接正电源，U2A输出脚输出整形脉冲。Furthermore, the pulse shaping unit includes the reset pin of U2A connected to the U1B output pin, the trigger pin of U2A connected to the U2B output pin through the capacitor C5, and connected to the positive power supply through the parallel resistor R15 and diode D1, and the control voltage pin of U2A through Capacitor C6 is connected to ground. The discharge pin and threshold pin of U2A are at the same point. Capacitor C7 is connected to ground and resistor R16 is connected to the positive power supply. The output pin of U2A outputs a shaping pulse.
更进一步的，所述振荡器单元和脉冲整形单元的U2A和U2B采用NE556。Furthermore, U2A and U2B of the oscillator unit and pulse shaping unit adopt NE556.
更进一步的，所述脉冲放大单元包括场效应管Q1，场效应管Q1的G脚通过电阻R17连接U2A输出脚，场效应管Q1的S脚接地，场效应管Q1的D脚接电阻R18的一端、电容C8的一端，以及二极管D3的正极端，二极管D3的负极端和电源的共点，与电阻R8和电容C8的另一端的共点分别连接脉冲变压器的初级，脉冲变压器的次级一端接KK型快速晶闸管的K脚，脉冲变压器的次级另一端连接二极管D4的正极，二极管D4的负极接稳压二极管DW2的负极和电阻R19，电阻R19的另一端连接KK型快速晶闸管的G脚，稳压二极管DW2的正极与K脚共点，KK型快速晶闸管的A脚接输出的负极。Furthermore, the pulse amplification unit includes a field effect transistor Q1. The G pin of the field effect transistor Q1 is connected to the output pin of U2A through the resistor R17. The S pin of the field effect transistor Q1 is connected to ground. The D pin of the field effect transistor Q1 is connected to the resistor R18. One end, one end of capacitor C8, the positive end of diode D3, the common point of the negative end of diode D3 and the power supply, and the common point of the other end of resistor R8 and capacitor C8 are respectively connected to the primary end of the pulse transformer and the secondary end of the pulse transformer. Connect the K pin of the KK type fast thyristor. The other end of the secondary end of the pulse transformer is connected to the anode of the diode D4. The cathode of the diode D4 is connected to the cathode of the Zener diode DW2 and the resistor R19. The other end of the resistor R19 is connected to the G pin of the KK type fast thyristor. , the anode of the Zener diode DW2 is at the same point as the K pin, and the A pin of the KK type fast thyristor is connected to the cathode of the output.
更进一步的，所述KK型快速晶闸管的G脚和K脚之间还连接有电容C9，二极管D5的正极连接K脚，负极连接G脚，电阻R20和发光二极管LED2串联，且发光二级管LED2的负极连接K脚，电阻R20的一端连接G脚。Furthermore, a capacitor C9 is connected between the G pin and the K pin of the KK type fast thyristor, the anode of the diode D5 is connected to the K pin, the cathode is connected to the G pin, the resistor R20 is connected in series with the light-emitting diode LED2, and the light-emitting diode The negative electrode of LED2 is connected to the K pin, and one end of the resistor R20 is connected to the G pin.
本发明的有益效果在于：启动稳定，控制成本低，使用寿命长。The invention has the beneficial effects of: stable start-up, low control cost and long service life.
附图说明Description of drawings
下面结合附图和实施例对本发明做进一步的阐述。The present invention will be further described below in conjunction with the accompanying drawings and examples.
图1 为本发明的原理框图；Figure 1 is a functional block diagram of the present invention;
图2 为本发明的电路原理图。Figure 2 is a schematic diagram of the circuit of the present invention.
具体实施方式Detailed ways
实施例1Example 1
如图1所示，一种大功率感应熔化炉续流管控制方法，在续流管控制电路中，在高端整流桥回路中连接续流管，在低端整流桥回路中连接KK型快速晶闸管，开机时，高端整流桥回路中续流管一直接入，低端整流桥回路中的KK型快速晶闸管由触发电路控制，在中频电压升高至设定值时，经触发电路产生触发脉冲触发，KK型快速晶闸管导通介入主电路，起到保护整流管的作用。As shown in Figure 1, a method for controlling the freewheeling tube of a high-power induction melting furnace. In the freewheeling tube control circuit, the freewheeling tube is connected to the high-end rectifier bridge circuit, and the KK-type fast thyristor is connected to the low-end rectifier bridge circuit. , when starting up, the freewheeling tube in the high-end rectifier bridge circuit is always connected, and the KK-type fast thyristor in the low-end rectifier bridge circuit is controlled by the trigger circuit. When the intermediate frequency voltage rises to the set value, the trigger circuit generates a trigger pulse. , KK type fast thyristor conduction intervenes in the main circuit and plays a role in protecting the rectifier.
所述续流管控制电路包括整流单元、比较器单元、振荡器单元、脉冲整形单元、脉冲放大单元与触发单元，其中整流单元进行电压采样，输出连接比较器单元，比较器单元为双电压比较器，比较器单元输出至振荡器单元、脉冲整形单元，由脉冲整形单元整形后输出至脉冲放大单元，由脉冲放大单元放大后输出至触发单元，触发单元触发KK型快速晶闸管。The freewheeling tube control circuit includes a rectifier unit, a comparator unit, an oscillator unit, a pulse shaping unit, a pulse amplification unit and a trigger unit. The rectifier unit performs voltage sampling, and the output is connected to a comparator unit. The comparator unit is a dual-voltage comparison unit. The comparator unit outputs to the oscillator unit and pulse shaping unit, which is shaped by the pulse shaping unit and then output to the pulse amplification unit, which is amplified by the pulse amplification unit and output to the trigger unit, which triggers the KK type fast thyristor.
实施例2Example 2
如图2所示，作为具体设计，所述整流单元包括电压采样变压器，与电压采样变压器连接的稳压电阻R1、R2，限流电阻R3，稳压管DW1，电容C1和极性电容E1滤波，经电阻R4输出。As shown in Figure 2, as a specific design, the rectification unit includes a voltage sampling transformer, voltage stabilizing resistors R1 and R2 connected to the voltage sampling transformer, current limiting resistor R3, voltage stabilizing tube DW1, capacitor C1 and polarity capacitor E1 for filtering , output through resistor R4.
比较器单元的U1A和U1B采用LM393集成电路。U1A同向输入脚连接电阻R4，U1A反向输入脚连接可调电阻W1，可调电阻W1一端接正电源，另一端通过电阻R6接地，U1A同向输入脚通过电阻R5连接U1A输出脚，U1A输出脚连接电阻R7、电阻R8的一端，以及极性电容E2的负极，电阻R7的另一端和极性电容E2的正极接正电源，电阻R8的另一端连接电阻R9和极性电容E3的正极，极性电容E3的负极接地，电阻R9的另一端接U1B同向输入脚，U1B反向输入脚连接可调电阻W2，可调电阻W2一端接正向电源，另一端通过电阻R11接地，U1B同向输入脚通过电阻R10连接U1B输出脚，U1B输出脚连接电阻R12的一端，以及极性电容E4的负极，电阻R12的另一端以及极性电容E4的正极接正电源，U1B输出脚控制振荡器单元及脉冲整形单元的复位端，根据需要设定炉体电压达到某一值才发出触发脉冲，把KK型快速晶闸管触发开通接入主电路，起到在故障时保护续流管的作用。U1A and U1B of the comparator unit use LM393 integrated circuit. The same direction input pin of U1A is connected to the resistor R4, and the reverse input pin of U1A is connected to the adjustable resistor W1. One end of the adjustable resistor W1 is connected to the positive power supply, and the other end is connected to the ground through the resistor R6. The same direction input pin of U1A is connected to the output pin of U1A through the resistor R5. U1A The output pin is connected to resistor R7, one end of resistor R8, and the negative electrode of polar capacitor E2. The other end of resistor R7 and the positive electrode of polar capacitor E2 are connected to the positive power supply. The other end of resistor R8 is connected to the positive electrode of resistor R9 and polar capacitor E3. , the negative pole of polarity capacitor E3 is connected to ground, the other end of resistor R9 is connected to the same input pin of U1B, the reverse input pin of U1B is connected to adjustable resistor W2, one end of adjustable resistor W2 is connected to the forward power supply, and the other end is connected to ground through resistor R11, U1B The same direction input pin is connected to the U1B output pin through the resistor R10. The U1B output pin is connected to one end of the resistor R12 and the negative electrode of the polar capacitor E4. The other end of the resistor R12 and the positive electrode of the polar capacitor E4 are connected to the positive power supply. The U1B output pin controls oscillation. The reset terminal of the thyristor unit and the pulse shaping unit is set according to the needs to set the furnace body voltage to reach a certain value before sending out the trigger pulse. The KK type fast thyristor is triggered and opened and connected to the main circuit to protect the freewheeling tube in the event of a fault.
振荡器单元和脉冲整形单元的U2A和U2B采用NE556。振荡器单元包括U2B的复位脚连接U1B输出脚，U2B的控制电压脚通过电容C4接地，U2B的触发脚、阀值脚共点，通过并联的电容C2、电容C3接地，U2B的放电脚接电阻R13、R14，电阻R13的另一端接正电源，电阻R14的另一端接U2B的阀值脚，由U2B、电容C2、电容C3、电阻R13、R14组成振荡器，振荡器脉冲率为2KHz，振荡脉冲由U2B输出脚输出。U2A and U2B of the oscillator unit and pulse shaping unit use NE556. The oscillator unit includes the reset pin of U2B connected to the output pin of U1B. The control voltage pin of U2B is connected to the ground through the capacitor C4. The trigger pin and the threshold pin of U2B are at the same point. They are connected to the ground through the parallel capacitor C2 and capacitor C3. The discharge pin of U2B is connected to the resistor. R13, R14, the other end of resistor R13 is connected to the positive power supply, the other end of resistor R14 is connected to the threshold pin of U2B, the oscillator is composed of U2B, capacitor C2, capacitor C3, resistors R13 and R14, the oscillator pulse rate is 2KHz, oscillation The pulse is output from the U2B output pin.
脉冲整形单元包括U2A的复位脚连接U1B输出脚，U2A的触发脚通过电容C5连接U2B输出脚，并通过并联的电阻R15、二极管D1连接正电源，U2A的控制电压脚通过电容C6接地，U2A的放电脚、阀值脚共点，并通过电容C7接地、通过电阻R16接正电源，U2A输出脚输出整形脉冲。The pulse shaping unit includes the reset pin of U2A connected to the output pin of U1B, the trigger pin of U2A connected to the output pin of U2B through capacitor C5, and connected to the positive power supply through parallel resistor R15 and diode D1. The control voltage pin of U2A is connected to ground through capacitor C6. The discharge pin and the threshold pin are at the same point and are connected to the ground through the capacitor C7 and the positive power supply through the resistor R16. The U2A output pin outputs a shaping pulse.
脉冲放大单元包括场效应管Q1，场效应管Q1的G脚通过电阻R17连接U2A输出脚，场效应管Q1的S脚接地，场效应管Q1的D脚接电阻R18的一端、电容C8的一端，以及二极管D3的正极端，二极管D3的负极端和电源的共点，与电阻R8和电容C8的另一端的共点分别连接脉冲变压器的初级，脉冲变压器的次级一端接KK型快速晶闸管的K脚，脉冲变压器的次级另一端连接二极管D4的正极，二极管D4的负极接稳压二极管DW2的负极和电阻R19，电阻R19的另一端连接KK型快速晶闸管的G脚，稳压二极管DW2的正极与K脚共点，KK型快速晶闸管的A脚接输出的负极。The pulse amplification unit includes a field effect tube Q1. The G pin of the field effect tube Q1 is connected to the output pin of U2A through the resistor R17. The S pin of the field effect tube Q1 is connected to ground. The D pin of the field effect tube Q1 is connected to one end of the resistor R18 and one end of the capacitor C8. , as well as the common point of the positive terminal of diode D3, the negative terminal of diode D3 and the power supply, and the common point of the other end of resistor R8 and capacitor C8 are respectively connected to the primary of the pulse transformer, and the secondary end of the pulse transformer is connected to the KK type fast thyristor. K pin, the other end of the secondary end of the pulse transformer is connected to the anode of diode D4, the cathode of diode D4 is connected to the cathode of zener diode DW2 and resistor R19, the other end of resistor R19 is connected to the G pin of KK type fast thyristor, the zener diode DW2 The positive electrode and the K pin are at the same point, and the A pin of the KK type fast thyristor is connected to the negative electrode of the output.
KK型快速晶闸管的G脚和K脚之间还连接有电容C9，二极管D5的正极连接K脚，负极连接G脚，电阻R20和发光二极管LED2串联，且发光二级管LED2的负极连接K脚，电阻R20的一端连接G脚。There is also a capacitor C9 connected between the G pin and the K pin of the KK type fast thyristor. The anode of the diode D5 is connected to the K pin and the cathode is connected to the G pin. The resistor R20 is connected in series with the light-emitting diode LED2, and the cathode of the light-emitting diode LED2 is connected to the K pin. , one end of the resistor R20 is connected to the G pin.
电压采样时利用原机配用的电压采样变压器上的一组20V电压，经整流桥S1WB整流，R1、R2使电压稳定，R3限流，DW1稳压，E1,C1滤波，经R4加入比较器U1A③(LM393)，再经R8，R9加入比较器U1B⑤（LM393），输出控制振器及脉冲整形电路的复位端，即根据需要设定炉体电压达到某一值才让触发脉冲发出，把KK关触发开通接入主电路，起到在故障时保护KP管作用。When sampling the voltage, a set of 20V voltage on the voltage sampling transformer equipped with the original machine is used, which is rectified by the rectifier bridge S1WB. R1 and R2 stabilize the voltage, R3 limits the current, DW1 stabilizes the voltage, E1 and C1 filter, and is added to the comparator through R4. U1A③ (LM393), and then added to the comparator U1B⑤ (LM393) through R8 and R9 to output the reset terminal of the control oscillator and pulse shaping circuit. That is, the furnace body voltage is set to a certain value as needed before the trigger pulse is sent out, and the KK The off trigger opens and connects to the main circuit to protect the KP tube in case of failure.
振荡器电路由U2B（NE556）R13、R14、C2、C3组成。振荡器脉冲率为2KHZ,振荡脉冲U2B⑨输出，经C5输入到整形电路U2A⑥脚，U2A⑤输出经R17加到脉冲放大电路Q1（IRF540）的栅极，脉冲经放大后，经脉冲变压器初级、次级，再经过瞬变二极前位，R19限流，输出脉冲去触发KK管。The oscillator circuit consists of U2B (NE556) R13, R14, C2, and C3. The pulse rate of the oscillator is 2KHZ. The oscillation pulse U2B⑨ output is input to the shaping circuit U2A⑥ pin through C5. The U2A⑤ output is added to the gate of the pulse amplification circuit Q1 (IRF540) through R17. After the pulse is amplified, it passes through the primary and secondary of the pulse transformer. , and then through the front position of the transient diode, R19 current limits, and outputs pulses to trigger the KK tube.
尽管上文对本发明的具体实施方式给予了详细描述和说明，但是应该指明的是，我们可以依据本发明的构想对上述实施方式进行各种等效改变和修改，其所产生的功能作用仍未超出说明书所涵盖的精神时，均应在本发明的保护范围之内。Although the specific embodiments of the present invention have been described and illustrated in detail above, it should be noted that we can make various equivalent changes and modifications to the above embodiments based on the concept of the present invention, and the functional effects thereof will not be the same. Anything beyond the spirit covered by the description should be within the protection scope of the present invention.
Claims (9)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011479578.1A CN112583286B (en) | 2020-12-15 | 2020-12-15 | A method for controlling the freewheeling tube of high-power induction melting furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011479578.1A CN112583286B (en) | 2020-12-15 | 2020-12-15 | A method for controlling the freewheeling tube of high-power induction melting furnace |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112583286A CN112583286A (en) | 2021-03-30 |
| CN112583286B true CN112583286B (en) | 2024-02-09 |
Family
ID=75135270
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011479578.1A Active CN112583286B (en) | 2020-12-15 | 2020-12-15 | A method for controlling the freewheeling tube of high-power induction melting furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112583286B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1211123A (en) * | 1968-08-26 | 1970-11-04 | Zentral Lab Elektrogeraete Veb | Switching arrangement for production of triggering pulses for controlled rectifiers |
| CN1070258A (en) * | 1992-06-18 | 1993-03-24 | 王希 | Electrical system for drying wood |
| CN1156347A (en) * | 1995-12-05 | 1997-08-06 | 株式会社电装 | Power generating equipment for vehicle |
| CN104836453A (en) * | 2015-05-14 | 2015-08-12 | 杭州科远电炉有限公司 | Novel thyristor series half-bridge inverter resonant frequency inverter device |
| CN110970873A (en) * | 2019-12-25 | 2020-04-07 | 淮北市平祥感应炉有限公司 | Rectifier thyristor protection device |
| CN211744359U (en) * | 2020-04-24 | 2020-10-23 | 上海兆力电器制造有限公司 | Induction smelting device |
-
2020
- 2020-12-15 CN CN202011479578.1A patent/CN112583286B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1211123A (en) * | 1968-08-26 | 1970-11-04 | Zentral Lab Elektrogeraete Veb | Switching arrangement for production of triggering pulses for controlled rectifiers |
| CN1070258A (en) * | 1992-06-18 | 1993-03-24 | 王希 | Electrical system for drying wood |
| CN1156347A (en) * | 1995-12-05 | 1997-08-06 | 株式会社电装 | Power generating equipment for vehicle |
| CN104836453A (en) * | 2015-05-14 | 2015-08-12 | 杭州科远电炉有限公司 | Novel thyristor series half-bridge inverter resonant frequency inverter device |
| CN110970873A (en) * | 2019-12-25 | 2020-04-07 | 淮北市平祥感应炉有限公司 | Rectifier thyristor protection device |
| CN211744359U (en) * | 2020-04-24 | 2020-10-23 | 上海兆力电器制造有限公司 | Induction smelting device |
Non-Patent Citations (2)
| Title |
|---|
| 500kg电渣炉电气系统的设计原理及维修;吴水桂;南方金属(第05期);全文 * |
| PLC应用及使用中易被忽视的细节问题;毛伟峰;;冶金动力(第02期);全文 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112583286A (en) | 2021-03-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102665369B (en) | High-power electronic ballast | |
| CN112091369A (en) | Inverter welding machine protection circuit and electric welding machine | |
| CN112583286B (en) | A method for controlling the freewheeling tube of high-power induction melting furnace | |
| CN101198203B (en) | Full-electric voltage electric ballast | |
| CN118074080B (en) | Surge current resistant winding resistor continuous startup and shutdown surge protection circuit | |
| CN201323692Y (en) | Large-power electronic ballast with wave current protection device | |
| CN215871202U (en) | A high-performance high-power water purifier power adapter with over-temperature protection indication | |
| CN203135507U (en) | A power frequency on-line uninterruptible power supply with power factor correction function | |
| CN213547366U (en) | Circuit for effectively inhibiting EMI (electro-magnetic interference) of switching power supply | |
| CN111697808B (en) | A water purifier power supply with self-discharging residual voltage | |
| CN211405854U (en) | Digital display adjustable switch voltage-stabilized source | |
| CN113765400B (en) | Switching power supply topology circuit and device comprising same | |
| CN212518784U (en) | A switching power supply with a circuit for suppressing the peak current at the start-up instant | |
| CN203368315U (en) | Power source control circuit having stable starting performance | |
| CN114744866A (en) | Integrated PFC + LLC half-bridge control circuit | |
| CN115102386A (en) | Single-stage LLC switching power supply circuit | |
| CN203840004U (en) | An intelligent high-efficiency fast charger | |
| CN203911760U (en) | Power supply capable of instantaneously outputting large power | |
| CN202818746U (en) | Electronic energy saving lamp high-power factor circuit | |
| CN206099805U (en) | High Efficiency Switching Converter Device | |
| CN205883631U (en) | A kind of instantaneous starting circuit after power failure | |
| CN217824731U (en) | A single-stage LLC switching power supply circuit | |
| CN204652261U (en) | A kind of 5V voltage conversion circuit | |
| CN222775975U (en) | A circuit for clamping relay voltage | |
| CN222691587U (en) | A switching power supply circuit for improving the efficiency of a power factor correction module |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: A Control Method for Continuous Flow Tube of High Power Induction Melting Furnace Granted publication date: 20240209 Pledgee: Huishang Bank Co.,Ltd. Huaibei Duji sub branch Pledgor: HUAIBEI PINGXIANG ELECTRIC FURNACE Co.,Ltd. Registration number: Y2025980012293 |