Adaptive Pulse Power Supply Design for Efficient Green Electrical Discharge Machining

2021 ◽  
Author(s):  
Minggang Xu ◽  
Xi Cheng ◽  
Enyu Song
Keyword(s):  
Power Supply ◽  
Electrical Discharge ◽  
Electrical Discharge Machining ◽  
Pulse Power ◽  
Pulse Power Supply

Study on Die Surface Coating by Electric Discharging Machining

2012 ◽  
Vol 490-495 ◽  
pp. 2619-2623 ◽  
Author(s):  
Xiao Hai Li ◽  
De Cheng Wang ◽  
Yu Fang
Keyword(s):  
Surface Modification ◽  
Power Supply ◽  
Electrical Discharge ◽  
Electrical Discharge Machining ◽  
Coating Layer ◽  
Pulse Power ◽  
Working Fluid ◽  
Pulse Power Supply ◽  
Die Surface ◽  
New Type

A new method of die surface modification by ordinary Electrical Discharge Machining (EDM) is described. First, the surface modification mechanism by EDM is studied, which is different with ordinary EDM. Secondly, the influence of important electric parameters on the effect of electric discharging coating in working fluid is analyzed, which is helpful to improve the coating layer. At last, the new type special pulse power supply with additional pulse current is designed. The special pulse power supply for electrical discharge coating behaves well, and the compacted coating layer without cracks deposited on the surface of die by EDM can be obtained, which can prolong the life of die

Tangent Hole Machined by Micro Electrical Discharge Machining

2009 ◽  
Vol 419-420 ◽  
pp. 821-824
Author(s):  
Mao Sheng Li ◽  
Guan Xin Chi ◽  
Zhen Long Wang ◽  
Yu Kui Wang
Keyword(s):  
Power Supply ◽  
Electrical Discharge ◽  
Electrical Discharge Machining ◽  
Pulse Power ◽  
Working Fluid ◽  
Machining Efficiency ◽  
Pulse Power Supply ◽  
Relative Wear ◽  
Micro Electrical Discharge Machining ◽  
Hole Machining

Based on a self-developed pulse power supply, effects of working fluid to machining efficiency and relative wear of electrode are studied. tangent-hole machining experiments are designed and carried out. Tangent holes with 0.75mm and 0.56mm diameters on some nozzles are obtained.

Control Strategy for Electrical Discharge Machining (EDM) Pulse Power Generator

2014 ◽  
Vol 554 ◽  
pp. 643-647 ◽  
Author(s):  
Minhat Ade Erawan ◽  
Khamis Nor Hisham ◽  
Azli Yahya ◽  
Andromeda Trias ◽  
Juli Purwanto Nugroho Kartiko ◽  
...  
Keyword(s):  
Power Supply ◽  
Electrical Discharge ◽  
Electrical Discharge Machining ◽  
Pulse Power ◽  
Dielectric Fluid ◽  
Hard Material ◽  
Machining Processes ◽  
Power Generator ◽  
Pulse Power Generator ◽  
Control Feedback

Electrical Discharge Machining (EDM) is a advanced machine that can control electrical spark to erode metal on the workpiece. In manufacturing, EDM is used on hard material parts that are extremely difficult to machine by conventional machining processes. EDM system consists of a shaped tool and the work piece, which are connected to a power supply and placed in a dielectric fluid. EDM pulse power generator applies voltage and current pulses between the electrode and workpiece to generate sparks through the gap. To obtain the optimum metarial removal rate (MRR), a good alternative is to improve the gap voltage and gap current. A proposed solution to these issue is combining ultracapacitor bank to the main power supply circuit for EDM machines. The control feedback of this research is designed to make sure that the current on DC bus is maintained at current setting during the machining processes.

Research on Energy-Saving EDM Pulse Power Supply

2008 ◽  
Vol 375-376 ◽  
pp. 714-718
Author(s):  
Yu Kui Wang ◽  
Bo Yan Song ◽  
Zhen Long Wang ◽  
Wan Sheng Zhao
Keyword(s):  
Energy Saving ◽  
Power Factor ◽  
Power Supply ◽  
High Speed ◽  
Closed Loop ◽  
Pulse Generator ◽  
Electrical Discharge Machining ◽  
Pulse Power ◽  
Electrode Wear ◽  
Pulse Power Supply

The performance and stability of output of electrical discharge machining (EDM) are determined by the output of EDM pulse power supply. In order to resolve disadvantages of conventional pulse power supply, such as undesirable efficiency and low power factor, the prototype design of energy-saving EDM pulse power supply is developed. It is composed of such three stages as a single-phase active power factor correction (PFC) pre-regulator, a full-bridge phase shift zero voltage switching (FB-PS-ZVS) converter based on complex control paralleled of machining current closed-loop and voltage closed-loop at period of spark gap insulation, and a pulse generator based on machining sequence control. The PFC pre-regulator contributes to a great increase to about 0.95 in its power factor. The efficiency of the new system is considerably increased to about 70% due to design of ZVS. The pulse generator contributes to the pulse machining current without a tail. Experiment results demonstrates that the prototype is capable of low electrode wear, high speed, stable machining.

Recent Patents about Pulse Power Supply of EDM

2020 ◽  
Vol 13 (1) ◽  
pp. 24-34
Author(s):  
En Li ◽  
Baocheng Xie ◽  
Yongqiu Chen
Keyword(s):  
Power Supply ◽  
Electrical Discharge Machining ◽  
Pulse Power ◽  
Power Supplies ◽  
Energy Utilization ◽  
Control Methods ◽  
Processing Quality ◽  
Pulse Power Supply ◽  
Processing Efficiency ◽  
And Control

Background: Electrical Discharge Machining (EDM) technique is an effective and reliable method for machining difficult-to-cut materials with complex shapes. Pulse power supply, a core component of the EDM machine tool, plays a major role in the processing efficiency and processing quality. Thus, more and more attention has been paid to the power types and control methods of pulse power supplies of EDM at present. Objective: To meet the increasing requirement of processing efficiency and processing quality of EDM, the power types and control methods of pulse power supplies are enhanced constantly. Methods: This paper sketches out various current representative patents relevant to the power types and control methods of pulse power supplies of EDM. Results: Through comparing the characteristics of the power types and control methods of pulse power supplies of EDM, the main problems in the present development such as low processing efficiency and poor processing quality are summarized and analyzed. Utilization and conservation of electric energy is also a concern. In addition, the further development tendency towards the power types and control methods of pulse power supplies of EDM is discussed. Conclusion: The optimization and development of the power types and control methods of pulse power supplies of EDM are beneficial to solve the problems of processing efficiency, processing quality and energy utilization in EDM. More interrelated patents on the pulse power supply of EDM will be invented later.

Research on Highly Efficient EDM Pulse Power Supply and Its Experiments

2005 ◽  
Vol 291-292 ◽  
pp. 567-572 ◽  
Author(s):  
Yu Kui Wang ◽  
Bo Yan Song ◽  
Wan Sheng Zhao
Keyword(s):  
Power Factor ◽  
Power Supply ◽  
High Speed ◽  
Closed Loop ◽  
Pulse Generator ◽  
Electrical Discharge Machining ◽  
Pulse Power ◽  
Electrode Wear ◽  
Pulse Power Supply ◽  
Highly Efficient

Their efficiency and their power factor of conventional independent electrical discharge machining (EDM) pulse power supplies with the current-limiting-resistor circuit is so low that they do not meet the need of advanced EDM technologies. The design of highly efficient EDM pulse power supply based on switching circuit pulse width modulation current closed-loop principle has been initiated. It is composed of such three stages as a single-phase active power factor correction preregulator, a full-bridge phase shift resonant converter based on machining current closed-loop control and a pulse generator based on machining sequence control. Therefore, the efficiency of the new system is considerably increased to about 70%, its weight and size is decreased much. Its power factor is a great deal increased to about 0.95. Experiment results have demonstrated that the highly efficient EDM pulse power supply is capable of low electrode wear, high speed, stable machining.

Sign in / Sign up

Export Citation Format

Share Document