CAPACITOR POWER SUPPLY UNIT FOR SMALL ELECTRICAL LOADS WITH A HIGH CURRENT REQUIREMENT

摘要

A capacitor power supply unit converts a mains voltage (U) into a lower operating voltage (V1) for a controller and a supply voltage (V2) for an electrical small load. A series circuit including a mains capacitor and a zener diode is connected to the mains voltage (U) whereat the supply voltage (V2) for an electrical small load having a permissible operating voltage is tapped off. The capacitor power supply unit provides for the supply voltage (V2) to be greater than the permissible operating voltage of the electrical small load and for the small load to be connected to the supply voltage (V2) via a buck converter. Here, the buck converter is controlled as a current source having a variable operating frequency.

主权项

1. A capacitor power supply component for converting a mains voltage (U) into a low operating voltage (V1) for a controller and supply voltage (V2) for an electric small load having a permissible operating voltage, the capacitor power supply component comprising:
a series circuit connected to said mains voltage; said series circuit including a mains capacitor and a zener diode; said zener diode being configured so as to permit said supply voltage (V2) to be tapped thereat for said electric small load having said permissible operating voltage; said supply voltage (V2) being greater than said permissible operating voltage; a buck converter; said electric small load being connected to said supply voltage (V2) via said buck converter; and, said buck converter being configured to be controlled as a current source having a variable operating frequency.