| 摘要 |
PURPOSE:To protect a power section and a computer section by installing a first overcurrent protective section on the output side of a large-power output circuit while mounting a second overcurrent protective section on the primary side of a voltage conversion section. CONSTITUTION:When a power section is brought to overload and overcurrents are made to flow, a first overcurrent protective section 8 is operated by the overcurrents, and the supply of power supply to the power section is interrupted. Since an insulation/voltage conversion section 5 is not subject to an effect at all at that time, however, feed to a computer section is held, and the computer section continues its operation as it is. When the combination signal of the output voltage of filter sections 7, 10 is displaced from the internal reference value of an error amplifying section 11 and the error signal exceeds a reference value preset to a second overcurrent protective section 12, a comparison section 3 stops a pulse output to a switching section 2, the operation of the switching section 2 is stopped, and output voltage is interrupted in the power section and the computer section. |
