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    • 3. 发明专利
    • DC STABILIZED POWER SUPPLY DEVICE
    • JPS57211615A
    • 1982-12-25
    • JP9619581
    • 1981-06-22
    • TOKYO SHIBAURA ELECTRIC CO
    • NAKAJIMA HIROSHIOSABE RIYOUJI
    • G05F1/56H02M3/155
    • PURPOSE:To obtain a small-sized and highly efficient DC stabilized power supply device, by switching a DC input voltage to interrupt it in accordance with the pulse width of a control signal and adding or subtracting a DC output obtained by smoothing this DC input voltage to or from the input voltage. CONSTITUTION:A part of the DC input voltage applied across terminals t11 and t12 is interrupted by a switching transistor TR12 and is dropped by a converter transformer 11 and is rectified and smotthed through a rectifying diode 12, a flywheel diode 17, a choke coil 14, and a capacitor 18 and is added as a DC voltage to the input voltage, this addition voltage is outputted as a DC output across terminals t13 and t14. This DC output is divided by resistances 15 and 16 and is sent to a diffferential amplifier 18 and is compared with a reference voltage 20 to obtain an error signal. The pulse width of a pulse width controlling circuit 21 is determined by this error signal, and the pulse switches the TR12 through a driving circuit 22. Thus, since only the variation of input and output is controlled, each element is small-sized, and the power consumption is small, and a highly efficient stabilized DC power supply device is obtained.
    • 6. 发明专利
    • JPS626425B2
    • 1987-02-10
    • JP3048279
    • 1979-03-15
    • TOKYO SHIBAURA ELECTRIC CO
    • ONODERA TOSHIHIROMASUDA YOICHINAKAJIMA HIROSHI
    • H03K17/64H02M3/155H02M3/28H02M3/335H02M7/537H03F3/217
    • PURPOSE:To prevent the generation of unwanted transient responses and to enhance power transmission efficiency by selecting the specific values of a transformer and a resonating capacitor, and the conducting time and period of a switching element. CONSTITUTION:A primary inductance L of a transformer 2 and a transistor 3 for which a resonating capacitor 6 is provided are connected to a DC power supply 1, and switching pulses are applied from a pulse generator 5. The output of the transformer 2 is rectified and supplied to a load 11. The ratio between the value of the secondary-side inductance which is converted into the value of the primary side and the inductance of the primary side is expressed ad the ordinate, and the ratio between the output voltage and the input voltage is expresses as the abscissa in the Figure, and the conducting times of the capacitor, the transformer, and the transistor are selected so that they lie within the scope of the curve PAS. Therefore, the voltage and the current when the transistor 3 is turned on or a off can be made almost zero, thereby unwanted transient responses can be eliminated.