Circuit structure and method for realizing long life of electromagnetic forming system based on dual power supply
An electromagnetic forming and circuit structure technology, applied in electrical components, output power conversion devices, conversion equipment without intermediate conversion to AC, etc., can solve the problems of driving coil temperature rise, shortening the life of capacitor power supply, and low electromagnetic forming efficiency. , to achieve the effect of reducing Joule heat, improving lifespan and improving efficiency
Active Publication Date: 2020-08-04
CHINA THREE GORGES UNIV
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Problems solved by technology
This form of discharge will lead to the following problems: the reverse voltage of the capacitor power supply is as high as 80%, which greatly shortens the life of the capacitor power supply; Greatly shorten the service life of the capacitor power supply; at the same time, because most of the energy is dissipated by the drive coil in the form of Joule heat, resulting in low efficiency of the entire electromagnetic forming system
However, in this method, although the freewheeling circuit 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, energy is dissipated in the form of Joule heat in the freewheeling resistor On the other hand, the efficiency of electromagnetic forming is not high
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[0055] figure 1 It is a schematic diagram of the circuit structure based on the dual power supply to realize the long life of the electromagnetic forming system.
[0056] figure 2 It 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.
[0057] according to figure 1 Described build electromagnetic forming system. The driving coil, the discharge switch and the current detection element are connected in series; the positive capacitance power supply is connected in series with the first thyristor switch; the negative capacitance power supply is connected in series with the second thyristor switch; and then all three are connected in parallel. The first charging switch and the first rectifying diode are used to charge the forward capacitor power supply; the second charging switch and the second rectifyi...
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A circuit structure and method for realizing long life of an electromagnetic forming system based on dual power supplies, the circuit structure includes a drive coil and a discharge switch; a capacitor power supply for providing energy to the drive coil; a rectifier diode and a charging switch for charging the capacitor power supply; A thyristor switch for switching the capacitor power supply; a current detection element for detecting the driving coil current; the capacitor power supply includes a positive capacitor power supply and a negative capacitor power supply; the charging switch includes a first charging switch and a second charging switch; The rectifier diode includes a first rectifier diode and a second rectifier diode; the thyristor switch includes a first thyristor switch and a second thyristor switch. The present invention mainly uses dual power supplies to eliminate the back pressure of the capacitor power supply, reduce the Joule heat dissipated on the drive coil, and recover most of the energy as the energy required for the next electromagnetic forming, thereby realizing a long-life electromagnetic forming system and being able to improve the electromagnetic Efficiency of the forming system.
Description
technical field [0001] 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 supplies, and is mainly used to improve the discharge life of the electromagnetic forming system. Background technique [0002] 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 light alloy materials. High-performance aluminum alloys, titanium alloys, and magnesium alloys have become the preferred materials for 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 light alloys. [0003] In electromagnetic forming, the driving coil is dischar...
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IPC IPC(8): H02M3/07
CPCH02M3/07H02M1/0067
Inventor 邱立易宁轩常鹏曹成熊奇邓长征江进波陈龙
Owner CHINA THREE GORGES UNIV