| 摘要 |
<p>1,125,578. Control of A.C. motors. SIEMENS-SCHUCKERTWERKE A.G. 17 Aug., 1966 [17 Aug., 1965], No. 36934/66. Addition to 1,122,517. Heading H2J. In the electrical transmission system described in the parent Specification the converters are controlled so that over a part of the speed range the voltage applied to the motors is proportional to frequency and over the remainder it is proportional to the square root of the frequency so that over this range the motors operate at constant power.</p> |
