| 摘要 |
PROBLEM TO BE SOLVED: To provide a turbomachinery driving device using a dual inverter system and its control method for dispensing with a main controller for controlling both inverters and an external communication device for transmitting signals showing mutual driving conditions and performing correlation of the signals simply to miniaturize the device and reduce its weight, cost, and the number of parts. SOLUTION: A complete double system water supply system is constituted by earth leakage breakers ELB1, ELB2, the inverters INV1, INV2, pumps 4-1, 4-2, and electric motors 5-1, 5-2. The inverters INV1, INV2 are mutually connected by a signal line S3 to correlate signals for mutual operation conditions, a failure condition, and operation demand for the other system. signal lines S4, S5 for transmitting flow rate signals are directly connected with each inverter among a group of sensors for detecting a load condition, and signal lines S6. S7 for transmitting pressure signals are connected with both inverters in common. COPYRIGHT: (C)2006,JPO&NCIPI
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