초록 ▼

A fluorescent lighting system has: (A) a central power supply connected with regular power line voltage and including a number of power supply modules (e.g., eight), each such module having: (i) a parallel-resonant self-oscillating bridge inverter operative to provide a 35 kHz sinusoidal output volt

A fluorescent lighting system has: (A) a central power supply connected with regular power line voltage and including a number of power supply modules (e.g., eight), each such module having: (i) a parallel-resonant self-oscillating bridge inverter operative to provide a 35 kHz sinusoidal output voltage at a pair of primary output terminals; (ii) a tank-inductor and a tank-capacitor parallel-connected across the primary output terminals; and (iii) several (e.g., four) pairs of secondary output terminals, each connected with the primary output terminals via its own dedicated current-limiting sub-circuit; thereby to prevent a load connected with a pair of secondary output terminals from drawing more than a certain amount of power; thereby, in turn, to render each pair of secondary output terminals fire-hazard-safe; (B) a plurality of lighting fixtures (e.g., 32), each having a fluorescent lamp and a power input receptacle; each lighting fixture also including a power-factor-corrected 35 Khz ballast connected between its power input receptacle and its fluorescent lamp; and (C) a light-weight power cord plug-in-connected between the power input receptacle of each lighting fixture and one of the pairs of power output terminals. Thus, a single central multi-port power supply will serve to power a large number (e.g., 32) lighting fixtures, with each individual lighting fixture connected directly with one of the many (e.g., 32) individual pairs of secondary power output terminals of the central power supply.

대표청구항 ▼

An arrangement comprising: plural frequency-converting power supplies mounted at a first location; each such power supply (i) being powered from ordinary power line voltage provided from an electric utility power line, and (ii) having plural power output ports at each of which is supplied a substant

An arrangement comprising: plural frequency-converting power supplies mounted at a first location; each such power supply (i) being powered from ordinary power line voltage provided from an electric utility power line, and (ii) having plural power output ports at each of which is supplied a substantially sinusoidal AC voltage of frequency distinctly higher than that of said power line voltage; each power supply having a sub-circuit connected therewithin and operative to limit the amount of power extractable from each power output port to a level so low that any passive load connected therewith would not constitute a fire-initiation hazard; and plural lighting units; each lighting unit located some distance away from the first location and including: (i) a power input port; (ii) a gas discharge lamp; (iii) a sub-assembly connected in circuit between the gas discharge lamp and the power input port; and (iv) a power supply cord connected between the power input port and one of the plural power output ports.