Considering that the cnc metal plate edm drilling machine uses a switching power supply solution, the efficiency problem of high output current can be solved. However, this has a way of corresponding to old problems, but new problems will arise. For example: Low load design will cause other problems, because most of the power supply solutions in the electronic system of cnc metal plate edm drilling machine are designed with fixed switching frequency. The pulse width modulation (PWM) control design of the electronic device can be maintained in a perfect state. The main advantage of using PWM design method is that it can meet the requirements of electromagnetic compatibility (EMC) specifications, and all filtering functions can be optimized according to the set switching frequency when needed. Unfortunately, the PWM mode also has limitations, for example, efficiency is not ideal under low load conditions.
In addition, because the switching process will produce a loss of current, and the switching regulator itself also needs to consume current, when the actual load drops to less than 10% of the maximum load, the overall efficiency of the cnc metal plate edm drilling machine power supply system will be greatly reduced. If the actual load drops to 1% of the maximum load, the efficiency will even drop below 50%. Therefore, the performance in this area must be greatly improved before switching regulators can be used in backup power supply systems.
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