How does a wire-cutting machine's switching regulator work?

Considering that wire-cutting machine tools use switched power supply solutions, the problem of high output current efficiency can be solved. However, there are ways to respond to the old problems, but new problems will emerge. For example, a low-load design method may cause other problems because most of the power supply solutions in the online-cutting machine tool electronic system use a fixed switching frequency design to modulate the pulse width of the electronic device (PWM ) Control the design to maintain an optimized state. The main advantages of adopting the PWM design method are more able to meet the electromagnetic compatibility (EMC) specification requirements, and can optimize all the filtering functions according to the set switching frequency when needed. Unfortunately, the PWM mode is also limited. For example, under low load conditions, the efficiency is not ideal.
In addition, the loss of current during the switching process, plus the switching regulator itself also consumes current, so when the actual load drops below 10% of the maximum load, the overall efficiency of the power supply system of the wire-cutting machine will drop significantly. If the actual load drops to 1% of the maximum load, the efficiency will even drop below 50%. Therefore, after the performance in this area must be greatly improved, the switching regulator can be used in a standby power supply system.

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