Micro electric spark pulse power supply based on Boost and RC circuits

Abstract

The invention discloses a micro electric spark pulse power supply based on Boost and RC circuits. The micro electric spark pulse power supply is characterized by comprising a main power loop, a driving circuit, an auxiliary direct-current voltage source and an FPGA controller, wherein the main power loop comprises a boost charging circuit and a discharging loop, and the boost charging circuit adopts a Boost circuit and is used for adjusting the voltage provided by the auxiliary direct-current voltage source and charging the discharging loop, and the discharge loop adopts an RC circuit for providing the breakdown voltage and the discharge energy after breakdown for a gap; the auxiliary direct-current voltage source is used for supplying power to the main power loop and the driving circuit,the FPGA controller is used for outputting a PWM control signal to the driving circuit according to a given target parameter, and the driving circuit performs digital isolation and amplification on the PWM control signal, and generates a driving signal to drive a switching tube in the main power loop to be switched on and switched off. According to the present invention, the charging voltage controllability and the energy adjusting precision are improved, and the machining precision and the machining quality are improved.

Description

technical field [0001] The invention relates to a high-frequency pulse power supply, in particular to a micro spark pulse power supply based on Boost and RC circuits. Background technique [0002] The pulse power supply is a core part of the EDM machine tool. The design of the pulse power supply has an important impact on the roughness of the machined surface, the damage degree of the tool electrode, the machining accuracy, the machining efficiency and the utilization rate of electric energy. The high requirement for machining accuracy means that the energy of a single discharge of the pulse power supply must be small enough, and the energy can be fine-tuned. However, most of the micro-EDM pulse power supplies on the market currently use a relaxation topology, and its single discharge energy is small, suitable for It is suitable for micro-processing, but the energy is uncontrollable and the processing efficiency is low. Contents of the invention [0003] The purpose of th...

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Problems solved by technology

The high requirement for machining accuracy means that the energy of a single discharge of the pulse power supply must be small enough, and the energy can be fine-tuned. However, most of the micro-EDM pulse power supplies on the market currently use a relaxation topology, and its single discharge energy is small, suitable for Suitable for micro-processing, but the energy is uncontrollable and the processing efficiency is low

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