| 单词 | power frequency |
| 释义 | > as lemmaspower frequency power frequency n. a frequency in the range used for alternating currents supplying power (commonly 50 or 60 Hz). ΘΚΠ the world > matter > physics > electromagnetic radiation > electricity > electric current > alternating current > [noun] > rate of recurrence > in supplying power power frequency1938 1938 Proc. Royal Soc. A. 169 267 Paschen's law held for power-frequency voltages and impulse voltages of a variety of waveshapes for pressures down to 10 cm. Hg. 1967 M. Chandler Ceramics in Mod. World iv. 130 Although excellent for insulation at power frequencies, porcelain is far from being the ideal insulating material where high frequencies..are involved. 2005 Design News (Nexis) 5 Sept. 45 The blades have to turn at nearly constant rpm to keep the ac power frequency steady. < as lemmas |
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