Precautions for high frequency induction heating and quenching machine tools
For overload caused by load changes, it can be adjusted through closed-loop control. However, when there is a more serious overload, such as the short circuit of the bridge arm of the inverter circuit, the fault current rises sharply in the IGBT tube, and a fast protection circuit must be provided for the IGBT at this time.
Debugging means tuning and testing. The test is to measure the parameters (voltage or current) and working state of the circuit after the circuit is assembled; the adjustment is to modify some parameters of the circuit on the basis of the test to make it meet the requirements of the design performance indicators. Before debugging, the debugging target should be clearly defined, and the debugging steps, debugging methods and instruments used should be known. Be aware of it, and only in this way can the debugging work be successfully completed.
Firstly, the whole system of intermediate frequency induction heating power supply is divided into three functional modules according to functions, and the control circuit, single-phase bridge IGBT inverter circuit and feedback loop module are installed and debugged. On this basis, the scope of installation and debugging is expanded, and then completed Installation and commissioning of the whole machine.