| 摘要 |
PURPOSE:To always obtain stable high efficient state in response to all operating states by independently providing the primary current and the slip frequency of an induction motor. CONSTITUTION:Command values of Id*, Iq* generated from the optimum efficiency pattern generator 1 are Id*, Iq* to become maximum efficiency for torque taum*, and Id* is corrected by a rotating frequency fM. The command of slip frequency fS* for the torque taum* being the maximum efficiency is output. The primary current and the slip frequency which become the maximum efficiency are actually measured in advance, and the patterned primary current and the slip frequency of the maximum efficiency point obtained by the actual measurement are used. |
