摘要:
The present invention provides a fading on and off electronic switch suitable for fading on/off control of electrical equipments like lamp and motor. The main circuit comprises a rectifier bridge circuit (D1-D4) and a thyristor (T R ). Control circuit includes a fast discharging synchronic integrator and a trigger pulse integrator (R1,D5,D6,C2), the former acts as a pulse phase shifter for triggering branch so as to provide a self-adapting magnitude variable sawtooth waveform, while the latter acts as a dynamic phase variation memory so as to provide varible reference for comparison. Trigger pulses, after being voltage feed back via main branch causes the synchronic integrator to fast discharge. If the discharging circuit of the trigger pulse integrator (R1,D5,D6,C2) is closed, the voltage on the integral capacitor (C2) decreases gradually, and trigger angle also decrease gradually. This is fading on process, and in fading off process, the conditions are just opposite. Fading on/off time can be independently set.
摘要:
The present invention provides a fading on and off electronic switch suitable for fading on/off control of electrical equipments like lamp and motor. The main circuit comprises a rectifier bridge circuit (D1-D4) and a thyristor (T R ). Control circuit includes a fast discharging synchronic integrator and a trigger pulse integrator (R1,D5,D6,C2), the former acts as a pulse phase shifter for triggering branch so as to provide a self-adapting magnitude variable sawtooth waveform, while the latter acts as a dynamic phase variation memory so as to provide varible reference for comparison. Trigger pulses, after being voltage feed back via main branch causes the synchronic integrator to fast discharge. If the discharging circuit of the trigger pulse integrator (R1,D5,D6,C2) is closed, the voltage on the integral capacitor (C2) decreases gradually, and trigger angle also decrease gradually. This is fading on process, and in fading off process, the conditions are just opposite. Fading on/off time can be independently set.
摘要:
The present invention relates to a kneading and displacing method and mechanism for fluid machinery and the use. The invention is suitable for application in internal combustion engine, pump, compressor, motor, driving, cooling, metering and other fields. During kneading and displacing process, the kneading wheel revolves and rotates in opposite directions inside the kneading cavity to synthesize the kneading and displacing motion, which has greatly lowered speed, moment of momentum and loss rate compared with rotor motion and needs no lubrication. The fluid machinery operating on the kneading and displacing method and mechanism may be used for both gas and liquid and has wide use.