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[2013-03-15]
High-intensity discharge HID lights energy-saving electric light source technology, specifically high pressure sodium ballasts are sine wave plus noise composite FM. With electromagnetic interference suppression filter EMI main power rectifier circuits, active power factor pre-adjustment circuit APFC DC power supply and control circuit, self-oscillating pulse generator, the drive of the half-bridge or full-bridge, half-bridge or full-bridge switches inverse variable, the start circuit, characterized in also has a sine wave generator, the noise generator,...
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[2013-03-14]
The ballast of the high-pressure gas discharge lamp, comprising: a DC power, a filter circuit, the flyback switch tube, DC - DC converter, a full bridge inverter, are connected to the lamp hot and cold state acquiring circuit of the controller, connected to the controlon the power supply circuit, a driving circuit and a sampling circuit, and an output terminal connected to the ignition circuit in the lamp. The full-bridge inverter input voltage DC power input voltage and DC - DC converter output capacitor voltage superposition. Controller controls the flyback switch on or off; tube control by controlling the flyback switching DC - DC converter power supply...
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[2013-03-14]
High-pressure sodium ballasts, which consists of high-power active filter integrated circuits, high-power MOS transistor, diodes, capacitors, resistors and transformer T1 is composed of a high-power active filter circuit to the switching circuit provides operating power to adjust the powerfactor and a stable output power, in the switching circuit is further provided a dedicated overcurrent protection circuit. The electronic ballasts features are: high efficiency, the effectiveness factor greater than 0.99, the energy-saving effect is remarkable, less than 10% of the total content of the third harmonic, can use a large area, low temperature rise, practical and reliable....
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[2013-03-14]
Solar street lighting system in high-pressure sodium electronic ballasts, characterized in that, said ballast comprising: a high-frequency ballast inductor, high pressure sodium lamp, the starter circuit. The starter circuit when a high-frequency AC square wave input frequency ballast inductor by controlling the induction loop to control high frequency ballast inductor DC square wave under high pressure sodium lamp starter...
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[2013-03-14]
Fluorescent electronic ballasts, in the switching circuit between the respective substrate and the emitter of the two transistors are respectively connected with a protection diode; one end of the filament other end, and the rectifier bridge output by a series resonant circuit in the high-frequency inductor coilthe resistance of the partial pressure, the partial pressure of the filter capacitor, the midpoint of the filter circuit in contact electronic ballasts. Supporting the use of fluorescent tubes can increase the life expectancy doubled, fluorescent lamp circuit than using magnetic ballast circuits power saving by 30%, and normal voltage range of 160-250V ballast itself does not exceed 30 ° C temperature rise. Cross-conversion rate of high-frequency strong electric field within the lamp 50K times per second....
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[2013-03-14]
Fluorescent lamps with electronic ballasts, is provided before the bridge rectifier type II L, C a low-pass filter, and one end and connected to the two high-frequency transistor is connected the collector - emitter, the other end and connected to the DC circuit isend of the R the C output phase correction network fluorescent lamps with electronic ballasts. The actual power consumption by using magnetic ballast 52W to 40W fluorescent lamp with the electronic ballast 35W, saving more than 30%....
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[2013-03-14]
Power efficient fluorescent lamps, comprising a lamp, provided in the lamp within the electrode and with the electrode connected to electronic ballasts, the mutual fitting of the lamp body and porcelain lampholders, said electrode is a ceramic electrode, said electronic ballast (3) is a special efficient electronic ballasts....
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[2013-03-13]
The fluorescent Ballasts by the current circuit. By two capacitors and three diodes comprise the primary by the current circuit, is connected in the the usually electronic ballast control circuit between the bridge rectifier and the high frequency generating. Matched the auxiliary by the current circuit consists of two capacitors and two inductors double π common mode rejection high frequency filter circuit connected in series between the bridge rectifier and AC power input....
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[2013-03-13]
The flicker of fluorescent ballasts drive circuit,IC drive a fluorescent lamp ballast, it is possible to avoid dramatic changes caused due to the moment of the power supply voltage when the lights light flashes. The flicker prevention circuit discriminant provided in the electronicballasts to drive the lamp electrode preheating process and the working state during preheating after. By making the drive voltage of the drive IC is maintained at above its minimum threshold, it is possible to make the drive in the lights when not instantaneous shutdown....
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[2013-03-12]
With high-power discharge lamp matches the electronic ballasts comprising: a filtered rectifier, the AC mains frequency of the voltage is converted into a DC voltage; pulled constant circuit, the output voltage, a power factor to improve the power factor, andwith the LC filter circuit to filter clutter; one half-bridge driver circuit, including a resonant frequency of a controlled digital circuit, in order to control the operating frequency of the half-bridge driver circuit, thereby changing the impedance of the LC matching network; a sampling circuit,sampling....
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