| 摘要 |
PCT No. PCT/DE92/00749 Sec. 371 Date Apr. 21, 1994 Sec. 102(e) Date Apr. 21, 1994 PCT Filed Sep. 4, 1992 PCT Pub. No. WO93/08607 PCT Pub. Date Apr. 29, 1993.In a method for controlling the frequency of a traveling wave motor, in which an actual value proportional to the actual frequency of the excitation alternating voltage of the traveling wave motor (10) is obtained from the amplitude of an alternating voltage (sense voltage) tapped from the amplitude of a stator (11) of the traveling wave motor (10). The actual value is compared with the desired frequency of the proportional desired value and the excitation frequency is corrected with the deviation which was subjected to suitable control algorithm. In order to stop the traveling wave motor (10) at a stable operating point at maximal performance, the desired value is derived from the amplitude modulation of the sense voltage. This desired value is obtained in a superimposed control loop in which the sense voltage is demodulated, rectified and compared with a predetermined desired amplitude modulation value. The comparative difference is fed to a controller (21), whose control value taken at its output, represents the desired value (1).
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