| 摘要 |
In a variable speed geared motor (50) constructed by combining an inverter motor (60) controllable in rotational speed by inverter drive with a gear reducer (70), the gear reducer (70) is of a two-stage type, and a reduction ratio i of the gear reducer (70) is suppressed so that i </= N holds where N stands for a maximum reduction ratio of the inverter motor (60) at which a constant torque characteristic can be ensured. Further, in a series of variable speed geared motors (50) each satisfying the above conditions, a common ratio (R) of a series of reduction ratios i of the variable speed geared motors is set to 1.2 - 1.5. For example, the series is set to 2, 3, 4, 5, 6, and 8. Accordingly, the geared motor (50) can be constructed lightly in weight, compactly, and at low costs, and it can be economically used in a rotational speed region of 200 - 900 rpm which is an ordinary region in driving of a pump or a high-speed conveyor. <IMAGE> |
| 申请人 |
SUMITOMO HEAVY INDUSTRIES, LTD., TOKIO/TOKYO, JP |
发明人 |
CHIBA, YOSHIKAZU, OHBU-SHI, AICHI 474, JP;TANIGAWA, MASAYUKI, KARIYA-SHI, AICHI 448, JP;EGAWA, MASANORI, CHIRYU-SHI, AICHI 472, JP;MINEGISHI, KIYOJI, CHITA-GUN, AICHI 470-21, JP |
