| 摘要 |
A magnet management method (100) of controlling a ferrite-type permanent magnet electrical machine includes receiving and/or estimating the temperature permanent magnets (110); determining if that temperature is below a predetermined temperature (112); and if so, then: selectively heating the magnets in order to prevent demagnetization (114) and/or derating the machine (116). A similar method (200) provides for controlling magnetization level by analyzing flux or magnetization level. Controllers that employ various methods are disclosed. The present invention has been described in terms of specific embodiment(s), and it is recognized that equivalents, alternatives, and modifications, aside from those expressly stated, are possible and within the scope of the appending claims. |
