Low-cost power-reducing device for hid lamp
阅读：174发布：2021-10-18
专利汇可以提供Low-cost power-reducing device for hid lamp专利检索，专利查询，专利分析的服务。并且Add-on device for high-intensity-discharge lamp and ballast which reduces the wattage at which the lamp is operated. The addon device has two parallel circuit paths, one of which is an RC circuit and the other of which comprises a triac. A diac connects the gate of the triac to the midpoint of the RC circuit to control the time in each half-cycle of energizing potential that the triac fires. The predetermined relative values of the RC components and the rating of the diac control the time of firing of the triac in each half-cycle, and thus determine the wattage at which the lamp is operated.，下面是Low-cost power-reducing device for hid lamp专利的具体信息内容。
1. In combination, an add-on control device connected in circuit with an HID lamp and current-limiting inductor connected in series therewith, wherein said current-limiting inductor has an inductive reactance of predetermined value to pass a current of average nominal predetermined value to operate said lamp at a predetermined wattage input when said inductor-ballasted lamp is energized by a predetermined AC potential, said add-on control device reducing by a predetermined amount the average nominal current passed by said inductor to reduce by a predetermined amount the wattage at which said lamp will operate, said add-on control device comprising: a. two electrical circuit paths connected in parallel and each connected to terminals which are connected in series with said series-connected lamp and said inductor; b. one of said circuit paths comprising a series-connected resistor means and a capacitor means each having predetermined electrical values; c. the other of said circuit paths having therein a solid-state eAC control-signal-responsive switching means having a control terminal, said AC control-signal-responsive switching means is responsive to the application of a control signal to the control terminal thereof to close during each half cycle of said AC energizing potential and to remain closed for the remainder of each such half cycle to supply electrical energy to said lamp, and the point in time during each half cycle of said AC energizing potential at which said AC control-signalresponsive switching means is closed determining the average current flow through said inductor; d. solid-state AC voltage-responsive switch means which will conduct only when the AC voltage applied thereacross exceeds a predetermined value, said AC voltage-responsive switch means connecting between the control terminal of said AC controlsignal-responsive switching means and the junction of said series-connected resistor means and said capacitor means to provide, when in a conducting state, a voltage control signal to the control terminal of said AC control-signal-responsive switching means to effect a closing of same; and the respective predetermined electrical values of said resistor means and said capacitor means providing a predetermined time constant to predetermine the time during each half cycle of said AC energizing potential said AC voltage-responsive switch means conducts to effect a closing of said AC control-signalresponsive switching means and thus reduce by a predetermined amount said average nominal current passed by said inductor.
2. The device as specified in claim 1, wherein said nominal average current passing through said inductor and said lamp will cause said lamp to operate with a predetermined wattage consumption which is one of various predetermined wattage ratings at which said HID lamps are designed to operate, and with the addition of said add-on control device, said inductor-ballasted HID lamp will operate at the next lower wattage rating for such HID lamps.
3. The device as specified in claim 2, wherein said add-on control device causes said lamp to operate at a lower wattage than the nominal wattage at which said lamp is rated.
4. The add-on device as specified in claim 3, wherein said lamp is a high-pressure mercury-vapor lamp rated for normal operation at about 400 watts, said AC control-signal-responsive switching means is a triac, said resistor means has an electrical value of about 100k ohms, said capacitor means has an electrical value of about 0.047 microfarad, said AC voltage-responsive switch means is a diac which conducts when the potential applied thereacross is about 40 volts, and said add-on control device causes said lamp to operate at about 250 watts.
5. The device as specified in claim 2, wherein said add-on control device causes said lamp to operate at about its nominal rated wattage.
6. The add-on device as specified in claim 5, wherein said lamp is a high-pressure mercury-vapor lamp rated for normal operation at about 250 watts, said AC control-signal-responsive switching means is a triac, said resistor means has an electrical value of about 100k ohms, said capacitor means has an electrical value of about 0.047 microfarad, said AC voltage-responsive switch means is a diac which conducts when the potential applied thereacross is about 40 volts, and said add-on control device causes said lamp to operate at about 250 watts.
7. The add-on device as specified in claim 1, wherein said lamp is a high-pressure mercury-vapor lamp rated for normal operation at about 400 watts, said AC control-signal-responsive switching means is a triac, said resistor means has an electrical value of about 39,000 ohms, said capacitor means has an electrical value of about 0.22 microfarad, said AC voltage switch means is a diac which conducts when the potential applied thereacross is about 40 volts, and said add-on controL device causes said lamp to operate at about 270 watts.
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