| 摘要 |
PURPOSE:To facilitate an easy parallel operation without remodeling an existing AC power supply device, by putting an impedance element between two AC power supply devices and at the same time providing a means to control the load share between both AC power supply devices. CONSTITUTION:An impedance element 4 is put between an existing AC power supply device 1 and a new AC power supply device 3. The voltage detected by a power supply detector 13 is compared with the target voltage level of a voltage setter 12, and therefore the output of the device 3 is controlled to a constant level. The effective and ineffective elements of the device 1 which are obtained by a power operator 8 are divided via voltage dividers 10 and 11. This divided voltage value is compared with the actual value of the power supply 3 obtained by a power operator 9, and the obtained deviation is supplied to a voltage controller 14 as well as a phase controller 15. In such a way, the change share is controlled between both devices 1 and 3 to ensure an easy parallel operation without remodeling the existing power supply device. |
