| 摘要 |
PROBLEM TO BE SOLVED: To improve a capacitor insulation type power supply by connecting a non-insulated auxiliary power supply to an AC voltage source, further connecting in series a capacitor, a reactor and a diode rectifier to a high-frequency power supply provided in this auxiliary power supply, and moreover forming a small capacity insulation power supply. SOLUTION: A non-insulated auxiliary power supply 3 is connected to a commercial 50 Hz or 60 Hz AC 200 V power supply 1, in addition to a main circuit 2 of several kW consisting of a diode-rectified DC power supply PN, power transistor and load or the like. A high-frequency power supplies Q1, Q2 is formed in the auxiliary power supply 3, capacitors C1, C2, reactor L and diode rectifier D are connected to these high frequency power supplies Q1, Q2 to form a small size serial C-system insulation power supply 5. As a result, a loss of zener diode can be suppressed by conducting the feedback control. |
