METHOD FOR CONTROLLING THE SPEED OF A THREE-PHASE PERMANENT MAGNET MACHINE HAVING A SOFT STARTER BY MEANS OF A CONTROLLER CASCADE, AND THREE-PHASE MACHINE (As Amended)

摘要

A battery state estimating apparatus as an embodiment includes a state estimator, a power estimator, and a determiner. The state estimator estimates a state of a battery. The power estimator estimates first power amount charged/discharged by the battery within a charging/discharging period, based on the state. The determiner compares the first power amount with second power amount inputted/outputted to/from the battery within the charging/discharging period and thereby determines validity of the state.