1. The design can reduce external circuit and have high control precision and good control effect.

2. The design reduced external circuit and had high control precision and good control effect.

3. The controller includes a linear regulator circuit, ML4425 external circuit, smooth start-stop circuit, three-phase power bridge and drive circuit.

4. Several stability conditions of discharge current of the low-pressure air arc light that are affected by the external circuit are deduced theoretically.

5. The damping circuit may already be built into the electrometer or may be an external circuit.

6. CP2200 is a network interface chip. Its small size, simple external circuit, low cost makes it easier to design with a microcontroller interface.

7. The system uses single - chip AT 89 S 52 control, greatly simplifying the external circuit design, system structure is simple.

8. However, it may be necessary to increase the damping with an external circuit.