ELECTRIC POWER SUPPLY DEVICE FOR POLOIDAL MAGNETIC FIELD

摘要

PURPOSE:To protect effectively transistor elements of a feedback electric power source and the like from a surging voltage and to obtain an economical and highly reliable electric power supply device for a poloidal magnetic field by providing taps on a winding wire of a decoupling transformer. CONSTITUTION:Taps 11 drawn from the position of less than 10% of whole winding wire turn number are drawn out, at a part of a feedback magnetic field winding wire 8 of a decoupling transformer. First of all, at an output end of a vertical feed back power supply 9, an induced voltage being generated when a vertical magnetic field power supply 10 is actually operated, is measured, and then a tap of the least induced voltage is selected from the taps 11. At that time, the vertical feedback power supply 9 is not operated. In this way, the power supply 9 begins to be operated after confirming that the induced voltage charged to the output end of the feed back power supply 9 when just the vertical magnetic field power supply 10 is operated, does not effect adversely the feedback power source 9, even if the aforementioned power supply 10 is operated.