A large number of fans call them "ZVS circuits". Wide application: The ZVS for Tesla coil flyback drive circuit is widely used in Spark Gap for Tesla unit (SGTC) and, stairs, generators, Marx, etc.
Zvs Coil Flyback Driver Auto Accessories High Voltage with Ignition Coil for
Zvs Coil Flyback Driver Fan DC 12-30V with Ignition Coil for Ladders Board
Zvs Coil Flyback Driver with Ignition Coil Auto Accessories High Quality for
Zvs Coil Flyback Driver High Quality High Voltage Fan Auto Accessories for Sgtc
Zvs Coil Flyback Driver Fan Auto Accessories High for Board Sgtc Generator
Electric Drill Stator Coil Replace Part Brushless Drill Coil