CN109617396B - Circuit structure and method for realizing long life of electromagnetic forming system based on dual power supply - Google Patents

Circuit structure and method for realizing long life of electromagnetic forming system based on dual power supply Download PDF

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CN109617396B
CN109617396B CN201910008841.XA CN201910008841A CN109617396B CN 109617396 B CN109617396 B CN 109617396B CN 201910008841 A CN201910008841 A CN 201910008841A CN 109617396 B CN109617396 B CN 109617396B
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power supply
switch
rectifier diode
charging
capacitor power
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CN109617396A (en
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邱立
易宁轩
常鹏
曹成
熊奇
邓长征
江进波
陈龙
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China Three Gorges University CTGU
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    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02MAPPARATUS 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
    • H02M3/00Conversion of DC power input into DC power output
    • H02M3/02Conversion of DC power input into DC power output without intermediate conversion into AC
    • H02M3/04Conversion of DC power input into DC power output without intermediate conversion into AC by static converters
    • H02M3/06Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using resistors or capacitors, e.g. potential divider
    • H02M3/07Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using resistors or capacitors, e.g. potential divider using capacitors charged and discharged alternately by semiconductor devices with control electrode, e.g. charge pumps
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02MAPPARATUS 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
    • H02M1/00Details of apparatus for conversion
    • H02M1/0067Converter structures employing plural converter units, other than for parallel operation of the units on a single load

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Abstract

The circuit structure and the method for realizing the long service life of the electromagnetic forming system based on the double power supplies comprise a driving coil and a discharge switch; a capacitive power source for providing energy to the drive coil; the rectifier diode and the charging switch are used for charging the capacitor power supply; a thyristor switch for switching the capacitive power supply; a current detection element for detecting a current of the driving coil; the capacitance power supply comprises a positive capacitance power supply and a negative capacitance power supply; the charging switch comprises a first charging switch and a second charging switch; the rectifier diode comprises a first rectifier diode and a second rectifier diode; the thyristor switch comprises a first thyristor switch and a second thyristor switch. The invention mainly adopts the double power supplies to eliminate the back pressure of the capacitance power supply, reduce the Joule heat dissipated on the driving coil and recover most energy as the energy required by the next electromagnetic forming, thereby realizing the long-life electromagnetic forming system and improving the efficiency of the electromagnetic forming system.

Description

基于双电源实现电磁成形系统长寿命的电路结构及方法Circuit structure and method for realizing long life of electromagnetic forming system based on dual power supply

技术领域technical field

本发明属于金属成形制造领域,特别是一种基于双电源实现电磁成形系统长寿命的电路结构及方法,主要用于提高电磁成形系统的放电寿命。The invention belongs to the field of metal forming manufacturing, in particular to a circuit structure and method for realizing long life of an electromagnetic forming system based on dual power sources, and is mainly used for improving the discharge life of the electromagnetic forming system.

背景技术Background technique

轻量化是航空航天、汽车工业等领域实现节能减排的重要技术手段。而实现轻量化的主要途径是采用轻质合金材料,高性能铝合金、钛合金、镁合金成为现代航空航天、汽车工业等实现轻量化的首选材料;电磁成形是一种高速率脉冲成形技术,能大幅改善金属材料成形性能,是解决轻质合金成形困难的有效手段之一。Lightweight is an important technical means to achieve energy saving and emission reduction in aerospace, automobile industry and other fields. The main way to achieve lightweight is to use lightweight alloy materials. High-performance aluminum alloys, titanium alloys, and magnesium alloys have become the preferred materials to achieve lightweighting in modern aerospace and automotive industries. Electromagnetic forming is a high-speed pulse forming technology. It can greatly improve the formability of metal materials and is one of the effective means to solve the difficulty of forming lightweight alloys.

电磁成形中,通过电容电源对驱动线圈放电,在驱动线圈内产生强大的脉冲电流,与此同时在金属工件中产生感应涡流;激励电流和感应电流之间的相互电磁力,驱动金属工件加速并发生塑性变形。显然,电容电源和驱动线圈是电磁成形最主要的部件。现有电磁成形技术中,采用电容电源作为电源为驱动线圈供电,一般放电电流为一衰减的正弦波,而电容电源上的电压亦为一衰减的余弦波。这一放电形式将导致以下问题:电容电源反压高达80%以上,极大地缩短了电容电源的寿命;驱动线圈吸收了大部分的电能转换驱动线圈的焦耳热,导致驱动线圈温升严重,极大地缩短了电容电源的使用寿命;同时,因为大部分能量被驱动线圈以焦耳热的形式耗散掉,导致整个电磁成形系统的效率低下。如专利“一种电磁成形装置及方法(CN 103817197 B)”,公开了一种电磁成装置及方法,通过驱动线圈驱动成形线圈随工件的变形运动,使成形线圈始终贴近工件,为工件的电磁成形提供持续的随形分布的电磁力,能有效提高工件的成形深度,并改善工件的贴模性。然而,此发明中脉冲电源提供的脉冲电流为衰减正弦波,导致脉冲电源的寿命不长,同时严重的焦耳热亦会导致驱动线圈和成形线圈的使用寿命。论文“Analysis and reduction of coiltemperature rise in electromagnetic forming (Journal of Materials ProcessingTechnology 225 (2015) 185–194)”提出了一种新型电路实现驱动线圈温升的降低,其通过续流回路串联续流电阻的方式转移部分焦耳热至续流电阻上,以达到降低线圈温升,提高驱动线圈寿命的目的。然而,这一方法中,虽然续流回路可以降低电容电源的反压,但却无法完全避免,对电容电源的寿命仍有一定的影响;同时,能量以焦耳热的形式耗散在续流电阻上,导致电磁成形效率并不高。In electromagnetic forming, the driving coil is discharged through the capacitor power supply, and a strong pulse current is generated in the driving coil, and at the same time, an induced eddy current is generated in the metal workpiece; the mutual electromagnetic force between the excitation current and the induced current drives the metal workpiece to accelerate and accelerate. Plastic deformation occurs. Obviously, the capacitive power supply and the driving coil are the most important components of electromagnetic forming. In the existing electromagnetic forming technology, a capacitor power source is used as the power source to supply power to the driving coil, and the discharge current is generally a decaying sine wave, and the voltage on the capacitor power source is also a decaying cosine wave. This form of discharge will lead to the following problems: the back pressure of the capacitor power supply is as high as more than 80%, which greatly shortens the life of the capacitor power supply; the drive coil absorbs most of the Joule heat of the power conversion drive coil, resulting in a serious temperature rise of the drive coil, extremely The service life of the capacitive power supply is greatly shortened; at the same time, because most of the energy is dissipated by the drive coil in the form of Joule heat, the efficiency of the entire electromagnetic forming system is low. For example, the patent "An Electromagnetic Forming Device and Method (CN 103817197 B)" discloses an electromagnetic forming device and method. The forming coil is driven to move with the deformation of the workpiece by the driving coil, so that the forming coil is always close to the workpiece, which is the electromagnetic wave of the workpiece. Forming provides continuous electromagnetic force with conformal distribution, which can effectively increase the forming depth of the workpiece and improve the mold fit of the workpiece. However, the pulse current provided by the pulse power supply in this invention is a decaying sine wave, which leads to a short service life of the pulse power supply, and at the same time, severe Joule heating will also lead to the service life of the driving coil and the forming coil. The paper "Analysis and reduction of coiltemperature rise in electromagnetic forming (Journal of Materials ProcessingTechnology 225 (2015) 185–194)" proposes a new circuit to reduce the temperature rise of the drive coil, which uses a freewheeling loop in series with a freewheeling resistor. Transfer part of the Joule heat to the freewheeling resistor to reduce the temperature rise of the coil and improve the life of the drive coil. However, in this method, although the freewheeling loop can reduce the back pressure of the capacitor power supply, it cannot be completely avoided, and it still has a certain impact on the life of the capacitor power supply; at the same time, the energy is dissipated in the freewheeling resistance in the form of Joule heat. Therefore, the electromagnetic forming efficiency is not high.

发明内容SUMMARY OF THE INVENTION

本发明提供了基于双电源实现电磁成形系统长寿命的电路结构及方法,主要通过采用双电源消除电容电源的反压、降低驱动线圈上耗散的焦耳热,回收大部分能量作为下一次电磁成形所需的能量,从而实现长寿命电磁成形系统,且能够提升电磁成形系统的效率。The invention provides a circuit structure and a method for realizing long life of an electromagnetic forming system based on dual power supplies, mainly by using dual power supplies to eliminate the back pressure of the capacitive power supply, reduce the Joule heat dissipated on the driving coil, and recover most of the energy as the next electromagnetic shaping The energy required for the electromagnetic forming system can be realized with a long life, and the efficiency of the electromagnetic forming system can be improved.

本发明采取的技术方案为:The technical scheme adopted in the present invention is:

基于双电源实现电磁成形系统长寿命的电路结构,包括驱动线圈、放电开关,该电路结构还包括:The circuit structure for realizing the long-life of the electromagnetic forming system based on the dual power supply, including the driving coil and the discharge switch, the circuit structure also includes:

用于为驱动线圈提供能量的电容电源;Capacitive power supply for powering the drive coil;

用于为电容电源充电的整流二极管、充电开关;Rectifier diode and charging switch for charging the capacitor power supply;

用于切换电容电源的晶闸管开关;Thyristor switch for switching capacitor power supply;

用于检测驱动线圈电流的电流检测元件;A current detection element for detecting the current of the drive coil;

所述电容电源包括正向电容电源、负向电容电源;The capacitor power supply includes a positive capacitor power supply and a negative capacitor power supply;

所述充电开关包括第一充电开关、第二充电开关;The charging switch includes a first charging switch and a second charging switch;

所述整流二极管包括第一整流二极管、第二整流二极管;The rectifier diode includes a first rectifier diode and a second rectifier diode;

所述晶闸管开关包括第一晶闸管开关、第二晶闸管开关;The thyristor switch includes a first thyristor switch and a second thyristor switch;

第一交流电源一侧连接第一充电开关一端,第一充电开关另一端连接第一整流二极管一端,第一整流二极管另一端连接第一晶闸管开关一端,第一晶闸管开关另一端连接正向电容电源一端,正向电容电源另一端连接第一交流电源另一侧;One end of the first AC power supply is connected to one end of the first charging switch, the other end of the first charging switch is connected to one end of the first rectifier diode, the other end of the first rectifier diode is connected to one end of the first thyristor switch, and the other end of the first thyristor switch is connected to the forward capacitor power supply One end, the other end of the forward capacitor power supply is connected to the other side of the first AC power supply;

第一整流二极管另一端连接放电开关一端,放电开关另一端连接驱动线圈一端,驱动线圈另一端连接电流检测元件一端,电流检测元件另一端连接第一交流电源另一侧;The other end of the first rectifier diode is connected to one end of the discharge switch, the other end of the discharge switch is connected to one end of the drive coil, the other end of the drive coil is connected to one end of the current detection element, and the other end of the current detection element is connected to the other side of the first AC power supply;

第一整流二极管另一端连接负向电容电源一端,负向电容电源另一端连接第二晶闸管开关一端,第二晶闸管开关另一端连接第一交流电源另一侧;The other end of the first rectifier diode is connected to one end of the negative capacitor power supply, the other end of the negative capacitor power supply is connected to one end of the second thyristor switch, and the other end of the second thyristor switch is connected to the other side of the first AC power supply;

第一整流二极管另一端连接第二交流电源一侧,第二交流电源另一侧连接第二充电开关另一端,第二充电开关一端连接第二整流二极管另一端,第二整流二极管一端连接第一交流电源另一侧。The other end of the first rectifier diode is connected to one side of the second AC power source, the other side of the second AC power source is connected to the other end of the second charging switch, one end of the second charging switch is connected to the other end of the second rectifier diode, and one end of the second rectifier diode is connected to the first the other side of the AC power source.

基于双电源实现电磁成形系统长寿命的方法,包括以下步骤:A method for realizing long life of electromagnetic forming system based on dual power supply, comprising the following steps:

S1:断开放电开关、第二晶闸管开关、第二充电开关,闭合第一晶闸管开关,闭合第一充电开关,采用第一整流二极管为正向电容电源充电;S1: Disconnect the discharge switch, the second thyristor switch, and the second charging switch, close the first thyristor switch, close the first charging switch, and use the first rectifier diode to charge the forward capacitor power supply;

S2:当正向电容电源电压值为U0时,断开第一充电开关完成正向电容电源充电;闭合放电开关,正向电容电源对驱动线圈放电产生脉冲电流,采用电流检测元件测量驱动线圈中的脉冲电流;S2: When the voltage value of the forward capacitor power supply is U0, turn off the first charging switch to complete the charging of the forward capacitor power supply; close the discharge switch, and the forward capacitor power supply discharges the driving coil to generate a pulse current, and the current detection element is used to measure the current in the driving coil. pulse current;

S3:在脉冲电流达到第一个电流峰值,di/dt=0时,闭合第二晶闸管开关,随后断开第一晶闸管开关,此时驱动线圈给负向电容电源供能;S3: When the pulse current reaches the first current peak value and di/dt=0, close the second thyristor switch, and then open the first thyristor switch, at this time, the driving coil supplies energy to the negative capacitor power supply;

S4:继续测量脉冲电流,在脉冲电流达到第一个半波结束,i=0时,断开放电开关,完成第一次正向放电过程;S4: continue to measure the pulse current, when the pulse current reaches the end of the first half-wave, i=0, turn off the discharge switch to complete the first forward discharge process;

S5:闭合第二充电开关,采用第二整流二极管为负向电容电源充电;S5: close the second charging switch, and use the second rectifier diode to charge the negative capacitor power supply;

S6:当负向电容电源电压值为-U0时,断开第二充电开关完成负向电容电源充电;S6: when the voltage value of the negative capacitor power supply is -U0, disconnect the second charging switch to complete the charging of the negative capacitor power supply;

S7:闭合放电开关,负向电容电源对驱动线圈放电产生脉冲电流,采用电流检测元件测量驱动线圈中的脉冲电流;S7: close the discharge switch, the negative capacitor power supply discharges the driving coil to generate a pulse current, and the current detection element is used to measure the pulse current in the driving coil;

S8:在脉冲电流达到第一个电流峰值,di/dt=0时,闭合第一晶闸管开关,随后断开第二晶闸管开关,此时驱动线圈给正向电容电源供能;S8: When the pulse current reaches the first current peak value and di/dt=0, close the first thyristor switch, and then open the second thyristor switch, at this time, the driving coil supplies energy to the forward capacitor power supply;

S9:继续测量脉冲电流,在脉冲电流达到第一个半波结束,i=0时,断开放电开关,完成第一次负向放电过程;S9: continue to measure the pulse current, when the pulse current reaches the end of the first half-wave, i=0, turn off the discharge switch to complete the first negative discharge process;

重复上述正向、负向放电过程,实现电磁成形系统的长寿命。The above-mentioned positive and negative discharge processes are repeated to achieve long life of the electromagnetic forming system.

闭合第二晶闸管开关与断开第一晶闸管开关之间的时延小于等于100微秒。时延过大会影响装置的效果,时延过小会导致装置成本增加。100微秒对于目前的技术而言比较容易实现,又不会太影响装置的效果。The time delay between closing the second thyristor switch and opening the first thyristor switch is less than or equal to 100 microseconds. Too much delay will affect the effect of the device, and too small delay will increase the cost of the device. 100 microseconds is relatively easy to achieve with the current technology without affecting the effect of the device too much.

闭合第一晶闸管开关与断开第二晶闸管开关之间的时延小于等于100微秒。时延过大会影响装置的效果,时延过小会导致装置成本增加。100微秒对于目前的技术而言比较容易实现,又不会太影响装置的效果。The time delay between closing the first thyristor switch and opening the second thyristor switch is less than or equal to 100 microseconds. Too much delay will affect the effect of the device, and too small delay will increase the cost of the device. 100 microseconds is relatively easy to achieve with the current technology without affecting the effect of the device too much.

本发明一种基于双电源实现电磁成形系统长寿命的电路结构及方法,优点在于:A circuit structure and method for realizing long life of an electromagnetic forming system based on dual power sources of the present invention have the advantages of:

1、正向电容电源的电压值一直为正,负向电容电源的电压值一直为负,两组电容电源均不存在反压,极大地提高了电磁成形系统电容电源的寿命;1. The voltage value of the positive capacitor power supply is always positive, and the voltage value of the negative capacitor power supply is always negative. There is no back pressure in the two sets of capacitor power supplies, which greatly improves the life of the capacitor power supply of the electromagnetic forming system;

2、单次电磁成形中驱动线圈仅存在半个周期的脉冲电流,极大地降低驱动线圈上耗散的焦耳热,提高驱动线圈的寿命,且能够提升电磁成形系统的效率。2. In the single electromagnetic forming, the driving coil only has a half-cycle pulse current, which greatly reduces the Joule heat dissipated on the driving coil, improves the life of the driving coil, and improves the efficiency of the electromagnetic forming system.

附图说明Description of drawings

下面结合附图和实施例对本发明作进一步说明:Below in conjunction with accompanying drawing and embodiment, the present invention will be further described:

图1为基于双电源实现电磁成形系统长寿命的电路结构示意图。Figure 1 is a schematic diagram of the circuit structure for realizing long life of the electromagnetic forming system based on dual power sources.

图2为电容电源的电压(Up、Un)和驱动线圈的电流(I)示意图。Figure 2 is a schematic diagram of the voltage (Up, Un) of the capacitor power supply and the current (I) of the drive coil.

1.电容电源;11.正向电容电源;12.负向电容电源;2.晶闸管开关;21.第一晶闸管开关;22.第二晶闸管开关;3.整流二极管;31.第一整流二极管;32.第二整流二极管;4.充电开关;41.第一充电开关;42.第二充电开关;5.放电开关;6.驱动线圈;7.电流测量元件。1. Capacitor power supply; 11. Positive capacitor power supply; 12. Negative capacitor power supply; 2. Thyristor switch; 21. First thyristor switch; 22. Second thyristor switch; 3. Rectifier diode; 31. First rectifier diode; 32. Second rectifier diode; 4. Charging switch; 41. First charging switch; 42. Second charging switch; 5. Discharging switch; 6. Driving coil; 7. Current measuring element.

具体实施方式Detailed ways

基于双电源实现电磁成形系统长寿命的电路结构,包括驱动线圈6、放电开关5,该电路结构还包括:The circuit structure for realizing long life of the electromagnetic forming system based on the dual power supply includes the drive coil 6 and the discharge switch 5, and the circuit structure also includes:

用于为驱动线圈6提供能量的电容电源1;Capacitive power supply 1 for providing energy to drive coil 6;

用于为电容电源1充电的整流二极管3、充电开关4;A rectifier diode 3 and a charging switch 4 for charging the capacitor power supply 1;

用于切换电容电源1的晶闸管开关2;Thyristor switch 2 for switching capacitor power supply 1;

用于检测驱动线圈6电流的电流检测元件7;电流检测元件7 采用皮尔森电流探头。A current detection element 7 for detecting the current of the driving coil 6; the current detection element 7 adopts a Pearson current probe.

所述电容电源1包括正向电容电源11、负向电容电源12;The capacitor power supply 1 includes a positive capacitor power supply 11 and a negative capacitor power supply 12;

正向电容电源11、负向电容电源12采用金属化膜电容器,电容值10-10000μF,电容电压1-50kV。The positive capacitance power supply 11 and the negative capacitance power supply 12 are metallized film capacitors, the capacitance value is 10-10000μF, and the capacitance voltage is 1-50kV.

所述充电开关4包括第一充电开关41、第二充电开关42;The charging switch 4 includes a first charging switch 41 and a second charging switch 42;

所述整流二极管3包括第一整流二极管31、第二整流二极管32;The rectifier diode 3 includes a first rectifier diode 31 and a second rectifier diode 32;

所述晶闸管开关2包括第一晶闸管开关21、第二晶闸管开关22。The thyristor switch 2 includes a first thyristor switch 21 and a second thyristor switch 22 .

第一交流电源一侧连接第一充电开关41一端,第一充电开关41另一端连接第一整流二极管31一端,第一整流二极管31另一端连接第一晶闸管开关21一端,第一晶闸管开关21另一端连接正向电容电源11一端,正向电容电源11另一端连接第一交流电源另一侧;One end of the first AC power source is connected to one end of the first charging switch 41 , the other end of the first charging switch 41 is connected to one end of the first rectifier diode 31 , the other end of the first rectifier diode 31 is connected to one end of the first thyristor switch 21 , and the other end of the first thyristor switch 21 is connected. One end is connected to one end of the forward capacitor power supply 11, and the other end of the forward capacitor power supply 11 is connected to the other side of the first AC power supply;

第一整流二极管31另一端连接放电开关5一端,放电开关5另一端连接驱动线圈6一端,驱动线圈6另一端连接电流检测元件7一端,电流检测元件7另一端连接第一交流电源另一侧;The other end of the first rectifier diode 31 is connected to one end of the discharge switch 5, the other end of the discharge switch 5 is connected to one end of the drive coil 6, the other end of the drive coil 6 is connected to one end of the current detection element 7, and the other end of the current detection element 7 is connected to the other side of the first AC power supply ;

第一整流二极管31另一端连接负向电容电源12一端,负向电容电源12另一端连接第二晶闸管开关22一端,第二晶闸管开关22另一端连接第一交流电源另一侧;The other end of the first rectifier diode 31 is connected to one end of the negative capacitor power supply 12, the other end of the negative capacitor power supply 12 is connected to one end of the second thyristor switch 22, and the other end of the second thyristor switch 22 is connected to the other side of the first AC power supply;

第一整流二极管31另一端连接第二交流电源一侧,第二交流电源另一侧连接第二充电开关42另一端,第二充电开关42一端连接第二整流二极管32另一端,第二整流二极管32一端连接第一交流电源另一侧。The other end of the first rectifier diode 31 is connected to one side of the second AC power source, the other end of the second AC power source is connected to the other end of the second charging switch 42, one end of the second charging switch 42 is connected to the other end of the second rectifier diode 32, and the second rectifier diode One end of 32 is connected to the other side of the first AC power source.

第一交流电源、 第二交流电源参数:380V、50Hz。Parameters of the first AC power supply and the second AC power supply: 380V, 50Hz.

实施例:Example:

图1为基于双电源实现电磁成形系统长寿命的电路结构示意图。Figure 1 is a schematic diagram of the circuit structure for realizing long life of the electromagnetic forming system based on dual power sources.

图2为电容电源的电压(Up、Un)和驱动线圈的电流(I)示意图,其中Up为正向电容电源电压,Un为负向电容电源电压。Figure 2 is a schematic diagram of the voltage (Up, Un) of the capacitor power supply and the current (I) of the driving coil, where Up is the positive capacitor power supply voltage, and Un is the negative capacitor power supply voltage.

按照图1所述搭建电磁成形系统。驱动线圈、放电开关和电流检测元件串联;正向电容电源和第一晶闸管开关串联;负向电容电源和第二晶闸管开关串联;然后三者一起并联。采用第一充电开关和第一整流二极管为正向电容电源充电;采用第二充电开关和第二整流二极管为负向电容电源充电。初始状态时,断开放电开关、第一晶闸管开关、第二晶闸管开关、第一充电开关、第二充电开关;0时刻时,闭合第一晶闸管开关,闭合第一充电开关,采用第一整流二极管为正向电容电源充电;T1时刻时,正向电容电源电压值充至设定值U0,断开第一充电开关完成正向电容电源充电;T2时刻时,闭合放电开关,正向电容电源对驱动线圈放电产生脉冲电流,采用电流检测元件测量驱动线圈中的脉冲电流;T3时刻时,检测到脉冲电流达到第一个电流峰值(di/dt=0),闭合第二晶闸管开关,随后断开第一晶闸管开关,此时驱动线圈给负向电容电源供能;T4时刻时,检测到脉冲电流达到第一个半波结束(i=0),断开放电开关,完成第一次正向放电过程,此时负向电容电源的电压值为-U1;T5时刻时,闭合第二充电开关,采用第二整流二极管为负向电容电源充电;T6时刻时,负向电容电源电压值充至设定值-U0,断开第二充电开关完成负向电容电源充电;T7时刻时,闭合放电开关,负向电容电源对驱动线圈放电产生脉冲电流,采用电流检测元件测量驱动线圈中的脉冲电流;T8时刻时,检测到脉冲电流达到第一个电流峰值(di/dt=0),闭合第一晶闸管开关,随后断开第二晶闸管开关,此时驱动线圈给正向电容电源供能;T9时刻时,检测到脉冲电流达到第一个半波结束(i=0),断开放电开关,完成第一次负向放电过程,此时正向电容电源的电压值为U1;重复上述正向、负向放电过程,实现电磁成形系统的长寿命。显然,正向电容电源的电压值一直为正,负向电容电源的电压值一直为负,两组电容电源均不存在反压,可提高电容电源的使用寿命,同时,每一次电磁成形过程中,驱动线圈的脉冲电流仅为一半波脉冲,能有效减小驱动线圈的温升,提供驱动线圈的使用寿命。从而实现电磁成形系统的长寿命。Set up the electromagnetic forming system as described in Figure 1. The driving coil, the discharge switch and the current detection element are connected in series; the positive capacitor power supply is connected in series with the first thyristor switch; the negative capacitor power supply is connected in series with the second thyristor switch; and then the three are connected in parallel together. The first charging switch and the first rectifying diode are used to charge the positive capacitive power supply; the second charging switch and the second rectifying diode are used to charge the negative capacitive power supply. In the initial state, the discharge switch, the first thyristor switch, the second thyristor switch, the first charging switch, and the second charging switch are disconnected; at time 0, the first thyristor switch is closed, the first charging switch is closed, and the first rectifier diode is used. Charge the forward capacitor power supply; at time T1, the voltage value of the forward capacitor power supply is charged to the set value U0, and the first charging switch is turned off to complete the charging of the forward capacitor power supply; at time T2, the discharge switch is closed, and the forward capacitor power supply is The discharge of the drive coil generates a pulse current, and the current detection element is used to measure the pulse current in the drive coil; at time T3, it is detected that the pulse current reaches the first current peak value (di/dt=0), the second thyristor switch is closed, and then disconnected The first thyristor switch, at this time, the drive coil supplies energy to the negative capacitor power supply; at time T4, it is detected that the pulse current reaches the end of the first half-wave (i=0), and the discharge switch is turned off to complete the first positive discharge. At this time, the voltage value of the negative capacitor power supply is -U1; at time T5, the second charging switch is closed, and the second rectifier diode is used to charge the negative capacitor power supply; at time T6, the voltage value of the negative capacitor power supply is charged to the set value. When the value is set to -U0, the second charging switch is disconnected to complete the charging of the negative capacitor power supply; at time T7, the discharge switch is closed, and the negative capacitor power supply discharges the driving coil to generate a pulse current, and the current detection element is used to measure the pulse current in the driving coil; At time T8, it is detected that the pulse current reaches the first current peak value (di/dt=0), the first thyristor switch is closed, and then the second thyristor switch is turned off. At this time, the driving coil supplies energy to the forward capacitor power supply; at time T9 When it is detected that the pulse current reaches the end of the first half-wave (i=0), the discharge switch is turned off to complete the first negative discharge process. At this time, the voltage value of the positive capacitor power supply is U1; repeat the above positive, Negative discharge process to achieve long life of electromagnetic forming system. Obviously, the voltage value of the positive capacitor power supply is always positive, and the voltage value of the negative capacitor power supply is always negative. There is no back pressure in the two sets of capacitor power supplies, which can improve the service life of the capacitor power supply. , the pulse current of the drive coil is only half-wave pulse, which can effectively reduce the temperature rise of the drive coil and provide the service life of the drive coil. Thereby a long life of the electromagnetic forming system is achieved.

Claims (3)

1.基于双电源实现电磁成形系统长寿命的方法,其特征在于包括一种电路结构,所述电路结构包括驱动线圈(6)、放电开关(5),该电路结构还包括:1. A method for realizing a long life of an electromagnetic forming system based on dual power sources, characterized by comprising a circuit structure, the circuit structure comprising a drive coil (6) and a discharge switch (5), the circuit structure further comprising: 用于为驱动线圈(6)提供能量的电容电源(1);a capacitive power supply (1) for providing energy to the drive coil (6); 用于为电容电源(1)充电的整流二极管(3)、充电开关(4);a rectifier diode (3) and a charging switch (4) for charging the capacitor power supply (1); 用于切换电容电源(1)的晶闸管开关(2);a thyristor switch (2) for switching the capacitive power supply (1); 用于检测驱动线圈(6)电流的电流检测元件(7);a current detection element (7) for detecting the current of the driving coil (6); 所述电容电源(1)包括正向电容电源(11)、负向电容电源(12);The capacitive power supply (1) includes a positive capacitive power supply (11) and a negative capacitive power supply (12); 所述充电开关(4)包括第一充电开关(41)、第二充电开关(42);The charging switch (4) includes a first charging switch (41) and a second charging switch (42); 所述整流二极管(3)包括第一整流二极管(31)、第二整流二极管(32);The rectifier diode (3) includes a first rectifier diode (31) and a second rectifier diode (32); 所述晶闸管开关(2)包括第一晶闸管开关(21)、第二晶闸管开关(22);The thyristor switch (2) includes a first thyristor switch (21) and a second thyristor switch (22); 第一交流电源一侧连接第一充电开关(41)一端,第一充电开关(41)另一端连接第一整流二极管(31)一端,第一整流二极管(31)另一端连接第一晶闸管开关(21)一端,第一晶闸管开关(21)另一端连接正向电容电源(11)一端,正向电容电源(11)另一端连接第一交流电源另一侧;One end of the first AC power supply is connected to one end of the first charging switch (41), the other end of the first charging switch (41) is connected to one end of the first rectifier diode (31), and the other end of the first rectifier diode (31) is connected to the first thyristor switch ( 21) One end, the other end of the first thyristor switch (21) is connected to one end of the forward capacitor power supply (11), and the other end of the forward capacitor power supply (11) is connected to the other side of the first AC power supply; 第一整流二极管(31)另一端连接放电开关(5)一端,放电开关(5)另一端连接驱动线圈(6)一端,驱动线圈(6)另一端连接电流检测元件(7)一端,电流检测元件(7)另一端连接第一交流电源另一侧;The other end of the first rectifier diode (31) is connected to one end of the discharge switch (5), the other end of the discharge switch (5) is connected to one end of the drive coil (6), the other end of the drive coil (6) is connected to one end of the current detection element (7), and the current detection The other end of the element (7) is connected to the other side of the first AC power supply; 第一整流二极管(31)另一端连接负向电容电源(12)一端,负向电容电源(12)另一端连接第二晶闸管开关(22)一端,第二晶闸管开关(22)另一端连接第一交流电源另一侧;The other end of the first rectifier diode (31) is connected to one end of the negative capacitor power supply (12), the other end of the negative capacitor power supply (12) is connected to one end of the second thyristor switch (22), and the other end of the second thyristor switch (22) is connected to the first the other side of the AC power supply; 第一整流二极管(31)另一端连接第二交流电源一侧,第二交流电源另一侧连接第二充电开关(42)另一端,第二充电开关(42)一端连接第二整流二极管(32)另一端,第二整流二极管(32)一端连接第一交流电源另一侧;The other end of the first rectifier diode (31) is connected to one side of the second AC power source, the other end of the second AC power source is connected to the other end of the second charging switch (42), and one end of the second charging switch (42) is connected to the second rectifier diode (32) ) at the other end, one end of the second rectifier diode (32) is connected to the other side of the first AC power supply; 实现电磁成形系统长寿命的方法,包括以下步骤:A method for realizing long life of an electromagnetic forming system, comprising the following steps: S1:断开放电开关、第二晶闸管开关、第二充电开关,闭合第一晶闸管开关,闭合第一充电开关,采用第一整流二极管为正向电容电源充电;S1: Disconnect the discharge switch, the second thyristor switch, and the second charging switch, close the first thyristor switch, close the first charging switch, and use the first rectifier diode to charge the forward capacitor power supply; S2:当正向电容电源电压值为U0时,断开第一充电开关完成正向电容电源充电;闭合放电开关,正向电容电源对驱动线圈放电产生脉冲电流,采用电流检测元件测量驱动线圈中的脉冲电流;S2: When the voltage value of the forward capacitor power supply is U0, turn off the first charging switch to complete the charging of the forward capacitor power supply; close the discharge switch, and the forward capacitor power supply discharges the driving coil to generate a pulse current, and the current detection element is used to measure the current in the driving coil. pulse current; S3:在脉冲电流达到第一个电流峰值,di/dt=0时,闭合第二晶闸管开关,随后断开第一晶闸管开关,此时驱动线圈给负向电容电源供能;S3: When the pulse current reaches the first current peak value and di/dt=0, close the second thyristor switch, and then open the first thyristor switch, at this time, the driving coil supplies energy to the negative capacitor power supply; S4:继续测量脉冲电流,在脉冲电流达到第一个半波结束,i=0时,断开放电开关,完成第一次正向放电过程;S4: continue to measure the pulse current, when the pulse current reaches the end of the first half-wave, i=0, turn off the discharge switch to complete the first forward discharge process; S5:闭合第二充电开关,采用第二整流二极管为负向电容电源充电;S5: close the second charging switch, and use the second rectifier diode to charge the negative capacitor power supply; S6:当负向电容电源电压值为-U0时,断开第二充电开关完成负向电容电源充电;S6: when the voltage value of the negative capacitor power supply is -U0, turn off the second charging switch to complete the charging of the negative capacitor power supply; S7:闭合放电开关,负向电容电源对驱动线圈放电产生脉冲电流,采用电流检测元件测量驱动线圈中的脉冲电流;S7: close the discharge switch, the negative capacitor power supply discharges the driving coil to generate a pulse current, and the current detection element is used to measure the pulse current in the driving coil; S8:在脉冲电流达到第一个电流峰值,di/dt=0时,闭合第一晶闸管开关,随后断开第二晶闸管开关,此时驱动线圈给正向电容电源供能;S8: When the pulse current reaches the first current peak value and di/dt=0, close the first thyristor switch, and then open the second thyristor switch, at this time, the driving coil supplies energy to the forward capacitor power supply; S9:继续测量脉冲电流,在脉冲电流达到第一个半波结束,i=0时,断开放电开关,完成第一次负向放电过程;S9: continue to measure the pulse current, when the pulse current reaches the end of the first half-wave, i=0, turn off the discharge switch to complete the first negative discharge process; 重复上述正向、负向放电过程,实现电磁成形系统的长寿命。The above-mentioned positive and negative discharge processes are repeated to achieve long life of the electromagnetic forming system. 2.根据权利要求1所述基于双电源实现电磁成形系统长寿命的方法,其特征在于:闭合第二晶闸管开关与断开第一晶闸管开关之间的时延小于等于100微秒。2 . The method according to claim 1 , wherein the time delay between closing the second thyristor switch and opening the first thyristor switch is less than or equal to 100 microseconds. 3 . 3.根据权利要求1所述基于双电源实现电磁成形系统长寿命的方法,其特征在于:闭合第一晶闸管开关与断开第二晶闸管开关之间的时延小于等于100微秒。3 . The method for realizing long life of an electromagnetic forming system based on dual power sources according to claim 1 , wherein the time delay between closing the first thyristor switch and opening the second thyristor switch is less than or equal to 100 microseconds. 4 .
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