| 摘要 |
PURPOSE: To obtain an inverter unit in which the size is reduced principally through surface connection circuit elements and the waveform of output voltage is not distorted even if an inverter transformer employing a manganese ferrite core is employed. CONSTITUTION: Not only an earth pattern but also conductor patterns 2, 3, 4 are not formed at the position (i) on a board 1 where the core of an inverter transformer comes into contact or approaches very closely. A conductor pattern 6 formed at the position (i) on a board 1 where the core of an inverter transformer comes into contact or approaches very closely is dedicated to magnetic shield of leakage flux from the inverter transformer and isolated from other conductor patterns 2, 3, 4, 5. With such arrangement, the stray capacitance causing distortion of the output voltage does not form a resonance circuit with any winding of the inverter transformer. |
