Switch and drive apparatus

A drive apparatus, configured to control turning-on and turning-off of a power component, the drive apparatus comprising:

• a cable configured to transmit a low-voltage drive current;
• at least one magnetic ring, wherein each magnetic ring is wound with a coil, the cable passes through the at least one magnetic ring, there is a gap between the at least one magnetic ring and the cable, and the at least one magnetic ring is configured to generate a high-voltage drive current based on the low-voltage drive current in the cable;
• an insulation layer configured to wrap the cable;
• at least one shield structure configured to shield an electromagnetic wave, wherein the at least one shield structure one-to-one corresponds to the at least one magnetic ring, the at least one shield structure is embedded in the insulation layer, and each shield structure is located between a corresponding magnetic ring and the cable;
• and
• a power component, configured to switch between turning-on and turning-off based on the high-voltage drive current.

A method comprising:

• determine a position of each magnetic ring of a plurality of magnetic rings to determine a quantity of required shield nets;
• adjust, based upon the determined position and the determined quantity, a size of each shield net to a proper size to ensure that each magnetic ring can be fully covered;
• sleeve each shield net on a conducting wire;
• connect each shield net at the determined position of each magnetic ring.