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[2013-03-19]
Fluorescent electronic ballasts, the electronic circuit of 50Hz or 60Hz power the rectified DC power, and then driven to self-oscillation transistor to turn on - turn off the exchange to generate high-frequency power supply, and the inductorseries resonant capacitor, resulting in a high voltage to excite the fluorescent lamp starter, and has automatic protection circuit when replacing the lamp or lamps damaged, it will automatically stop the electronic ballasts action, rather than produce a high voltage, so as to avoid the danger....
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[2013-03-19]
Fluorescent lamp electronic ballasts, including a full-bridge rectifier, and full-bridge rectifier connected PFC module, connected to the half-bridge inverter module with PFC module also includes control with MCU connected with the PFC module, theof said microcontroller generates a PWM waveform control transistor in the power the half-bridge inverter modules opened and closed, the DC power into high frequency alternating current to maintain lamp work; the soft-start fluorescent lamp using a thermistor can be preheated, can effectively prevent the lamptube ends black, using the microcontroller to generate the PWM waveforms to control the power transistor is opened and closed, the DC power into high frequency electronic ballasts alternating current. Better able to sustain the work of the lamp....
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[2013-03-19]
The High-pressure sodium lamp electronic ballasts: relates to a discharge lamp ignition control circuit devices, in particular, the case for high-pressure sodium lamp ignition, oscillating electronic ballasts control a full bridge. The utility model the four switching power transistors to form a full-bridge oscillator, amorphous core as electric reactor, and the control circuit board. Implementation of the utility model can be obtained as follows positive effect; saving of up to 65% or more, and a 150W sodium lamp power consumption dropped from 4A to 1,3 A, power factor of 0.98 or more....
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[2013-03-19]
The high-pressure sodium ballasts, including the resistance to electromagnetic interference filter circuit, the bridge electronic ballast circuit, the active power correction circuit, the ignition circuit, the lamp current, the voltage detection circuit, and the temperature and the failure detection circuit, by the micro-processing controller and DC/ DC regulator circuit consisting of power and current pulse width modulation controller, and by a micro controller and the low-frequency square wave converter circuit consisting of the low-frequency square wave full bridge converter....
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[2013-03-18]
HPS electronic ballasts, which comprises a full bridge rectifier circuit, the passive correction circuit, a half-bridge inverter circuit, and the trigger circuit, anti-acoustic resonant circuit and a feedback circuit; said passive correction circuit is a two-way self-complementary circuit; triggercircuit by a pulse transformer L4, diode D10 in series with anti-sound frequency resonant circuit with the half-bridge inverter circuit output coil connection. Both ends of the resonant circuit wherein said high-pressure sodium lamp connected in the anti-sound frequency....
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[2013-03-18]
Disposable starter electronic ballasts, including a resonant circuit, the resonant circuit is provided with a protection circuit, in series by the capacitor C5, the resistor R and the starter TP constituting the protection circuit and the parallel resonant capacitor C of the resonant circuit. Paul normal and stable operation of the lamp with the present utility model to assist the work of the lamp, for the periodicity of the light emitting effect can be, but also to disposable Qiliang lamp, and also to prevent the repeated impact of damage to the circuit elements of the circuit, improved the service life of the electronic stability, greatly increasing the cost-effective stabilizer. Is a set of high-quality, high efficiency and safety in one of the one-time starter fluorescent ballasts....
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[2013-03-18]
Electronic ballasts does not start protection. With a rectifier links, a RC network, a voltage divider, a delay trigger circuit and a thyristor switch . The protector directly or through damping capacitor and contains the master oscillator capacitor does not include the inductance of the main oscillation is detected branch sections for sampling voltage the delay capacitor charging, at least from the ballast LCR branch Dentsu light does not start trigger conduction in the state where a non-contact switch, will be detected branched sections approximate short-circuiting or the damping capacitance into branched sections is detected, forcing where slip damping current limiting to protect the components in the branch and main circuit where against long high-frequency or over-current damage, while the other branch is business as usual. The easy and flexible, safe and reliable....
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[2013-03-18]
High pressure sodium ballasts starts the output limiting circuit, including a trigger circuit and a starting circuit, the starting circuit has two transformers T3, T4, the trigger circuit provides a start signal for the start circuit; characterized in that the starting circuit of the two transformers T3, T4, theRoom is also connected with the two relay J1, J2, the secondary winding of the two transformers in series, the two relays in the starting circuit after striking voltage is generated by the control circuit provides a signal occurs Actions, so that two transformers from limitingthe role of the primary coil is connected in series is converted into a parallel connection....
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[2013-03-17]
Neon abnormal state protection of electronic ballasts, switch rectifier filter circuit, high frequency oscillation wave generating circuit and output load resonant circuit, output load resonant circuit connected across one leads to both ends of the filament foot in fluorescent tubes KaiHui capacitor with a positive temperature coefficient thermistor in parallel, wherein the starter at both ends of the capacitor is also in parallel with a as the abnormal state protection device with bimetal contacts neon tube, the structure is simple, easy to manufacture, low costreliable, can significantly improve the reliability of the use of high pressure sodium ballasts....
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[2013-03-17]
Single complex electronic ballasts fault protection device. Protect the device from where LCR circuit choke inductor to take pressure sampling, when the lamp failure of the circuit Dentsu but sustained high-frequency overcurrent action, forcing the circuit damping current limiting. Protecting the circuit and the main circuit elements in the high-frequency from a long time overcurrent damage. The utility model can not only achieve a single lamp or multi-lamp fault circuit current limiting protection, and allow normal lamp circuit to continue to work, on-site and basic lighting also implement full current limit protection on all the lights fault circuit, the power complex high pressure sodium ballasts particularly applicable, paved the way for the group of lights gas discharge....
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