| 摘要 |
PURPOSE:To have the respective output currents of power supply apparatuses for parallel operation balanced. CONSTITUTION:If the output voltage of a power supply 2 is little higher than the output voltage of a power supply 3, a current is supplied to a load 1 mainly from the power supply 2 and supplied little from the power supply 3. Then the power supply 2 generates mush heat and the resistance of a thermistor 22 is reduced and the output voltage is lowered a little to become lower than the output voltage of the power supply 3. Then the load current is mainly supplied from the power supply 3. As the power supply 2 is little loaded, it is cooled. The above processes are repeated to have the output currents of the power supply 2 and 3 balanced. |
