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パラメトリック単相多相変換器を用いた磁気式周波数逓倍装置
ja
丹野 頼元
池田 清志
信州大学工学部
信州大学工学部紀要 31: 71-86 (1971)
信州大学工学部紀要
31
71-86
1971-12-25
In this paper the principle and the trial production equipment of frequency multiplier utilizing single-phase to polyphase converter by means of parametric oscillation are described. This equipment has a quite new principle and a merit which has a non-integer multiplication ratio. On this account it can be applied to a signal source of a control system. First in the principle the multiplication ratio corresponding to the value of phase number p and the circuit construction are explained. And a calculation equation is derived from dealing with the saturable core independently and supposing that the output of the phase converter is constant. At the same time the magnetic characteristics are approximated to the idealized properties. The experiment investigates the calculation equation which is derived from the principle. Namely the basic experiment in frequency 60Hz and the multiplying experiment in phase converter output frequency 30Hz investigate it. The differences between the value of experiment and the value gained by the calculation equation are studied comparatively. It is considered that these differences are due to the magnetic characteristics of the saturable core being approximated to the idealized properties in the calculation equation. The difference bletween the calculation value and the experimental value is lager in the basic experiment than that in the multiplying experiment. This is considered to be due to the neglect of the loss resistance of the phase converter and saturable core in the calculation equation. It is supposed that a saturable core does not influence the output of a phase converter, but it is made clear that the saturable core surely affect the output of the phase converter. Futhermore the obvious facts gained from the results of the trial production equipments, i, e. 60Hz-90Hz and 60Hz-15OHz multipliers are as follows 1) Increasing in number of phase, the efficiency is worse. 2) The uniform saturable core and the constant output of the phase converter are necessary. 3) The saturable core must satisfy the oscillating condition of the oscillator circuit of the phase converter. 4) An impedance transformer is necessary, if the saturable core do not satisfy the oscllation condition. 5) The combination of the circuit of the phase converter and the saturable core determines the efficiency of the equipment. By the way, this equipment operates much compricatedly because of the combination of the circuit of the phase converter and the saturable core. The method to design this equipment must be discussed as the combination of the circuit of the phase converter and the saturable core.
Article
application/pdf
0037-3818
AN00121228