Turbulent shear flows 5
Turbulent shear flows 5
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湍流剪切流 5
DOI:
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发表时间:
1987
期刊:
影响因子:
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通讯作者:
M. Hayakawa
中科院分区:
文献类型:
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作者:
R. Metcalfe;F. Hussain;S. Menon;M. Hayakawa
A source of electric current has a first terminal connected to one end of each of a plurality of phase windings of a stepping motor whose other ends are connected via controllably operable switches to a second terminal of the current source, the switchesare energized in particular sequence and with controllably variable duty cycle signals wherein the duty cycle of the signals controls the power, speed and rotation of the motor.