SWITCHING REGULATOR UTILIZING PLL CIRCUIT

PURPOSE: To reduce a noise level and cost of circuit devices by digitalizing a command from an NC apparatus and utilizing a PLL circuit for a control circuit. CONSTITUTION: An apparatus comprises a rectifying circuit 1 to obtain a DC from an AC power supply, a switching element 3 for chopping the DC...

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Bibliographische Detailangaben
1. Verfasser:	TOMIDOKORO YUSUKE
Format:	Patent
Sprache:	eng
Schlagworte:	APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC,OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWERSUPPLY SYSTEMS AUTOMATIC CONTROL, STARTING, SYNCHRONISATION, OR STABILISATIONOF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES BASIC ELECTRONIC CIRCUITRY CONTROL OR REGULATION THEREOF CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUTPOWER CONVERSION OR DISTRIBUTION OF ELECTRIC POWER ELECTRICITY GENERATION
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Beschreibung
Zusammenfassung:	PURPOSE: To reduce a noise level and cost of circuit devices by digitalizing a command from an NC apparatus and utilizing a PLL circuit for a control circuit. CONSTITUTION: An apparatus comprises a rectifying circuit 1 to obtain a DC from an AC power supply, a switching element 3 for chopping the DC output, a smoothing circuit 5 for smoothing this output and a control circuit 7 for controlling the switching element 3, etc. The control circuit 7 is composed of a voltage controlled oscillator 9 for converting an output voltage of the smoothing circuit 5 into a pulse of the corresponding frequency, a digital phase comparator 11 for pulling this pulse to the same phase as a command pulse having a duty factor (Ton/T) from an NC apparatus and a drive circuit 13 of the switching element, etc.