190W POWER LIMITER CIRCUIT FOR LIGHTING EQUIPMENT

• US 20100102745A1
• Filed: 10/27/2008
• Published: 04/29/2010
• Est. Priority Date: 10/27/2008
• Status: Abandoned Application

• Current Assignee: Hsi-Chou Wu
• Original Assignee: Hsi-Chou Wu
• Inventors: WU, HSI-CHOU
• Application Number:
  US12/258,993
• Publication Number:
  US 20100102745A1
• Time in Patent Office: Days
• US Class Current: 315/291
• CPC Class Codes: H05B 39/044 continuously H05B39/042 takes precedence
• CPC Class Codes: Y02B 20/00 Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps

Abstract

A 190 W power limiter circuit for lighting equipment includes a DC power supply unit employed to transform an AC power source into a low DC output voltage, a DC voltage regulator used to regulate the DC power supply unit for a micro controller unit, an AC synchronization unit utilized to receive a synchronization signal of an AC line frequency and an AC voltage variation that are sent to the micro controller unit to achieve a synchronous triggering with the AC line frequency for driving an AC lamp driver unit, and an AC current sensor unit used to induct AC of a load circuit and having a resistor, manganese copper, a semi-conductor IC or a current transformer, which is connected to AC lamps in series, able to create voltage inducting signals fed back to the micro controller unit to adjust a triggering angle of the AC lamp driver unit for keeping power consumption less than 190W despite the load change of the lamps.

Claims

1. A 190 W power limiter circuit for lighting equipment, said circuit comprising:

a DC power supply unit directly connected with an AC power source and employed to transform a high voltage of said AC power source into a low DC output voltage so as to supply power for successive units;

a DC voltage regulator unit connected to said DC power supply unit and used to regulate voltage of a current outputted from said DC power supply unit to a micro controller unit;

an AC synchronization unit utilized to receive an AC synchronization signal of an AC line frequency and an AC voltage variation, said AC synchronization signal and said AC voltage variation consecutively sent to a micro controller unit 4;

said micro controller unit employed to process said AC synchronization signal and said AC voltage variation and an AC voltage signal corresponding to alternative current of a load circuit so as to achieve a synchronous triggering with said AC line frequency for driving an AC lamp driver unit; and

an AC current sensor unit used to induct alternative current of a load circuit and provided with an inducting device such as a resistor or manganese copper or a semi-conductor IC or a current transformer, said inducting device connected to AC lamps in series and able to create voltage inducting signals corresponding to alternative current of said load circuit, said inducting signals then fed back to said micro controller unit that is to consecutively analyze said AC synchronization signal and said AC voltage variation to be synchronous with said AC line frequency to adjust a triggering angle of said AC lamp driver unit so as to keep power consumption less than 190 W no matter how a load of lamps is enlarged or how an AC voltage or an alternative current of said load are changed.