12,562 views
COURSES TAUGHT BY PROF. VALDENILTON: Basic Electronics Course Level 1 and 2 Online (100% in VIDEO) https://go.hotmart.com/S90922297H?dp=1 Digital LCD/LED TV Repair Course (100% in PDF) https://technologycursos.wixsite.com/... Transformer Winding Course (100% in PDF) https://hotm.art/Curso-de-enrolamento... COURSES TAUGHT BY OTHER TEACHERS: Basic Electronics Course (with a focus on repair) https://hotm.art/Curso-de-eletronica-... Basic Electronics Course (with a general focus) https://hotm.art/Curso-de-eletronica-... Cell Phone Repair Course (version 5.0) https://hotm.art/Conserto-de-celular-top Cell Phone Repair Course Notebook Motherboard https://hotm.art/Conserto-de-placa-ma... Voltage Inverter Manufacturing and Repair Course https://hotm.art/Aprenda-a-fazer-inve... Photovoltaic Solar Energy Course https://hotm.art/Curso-energia-solar-... Complete Digital Marketing Course (from scratch) https://hotm.art/Curso-de-Marketing-D... In this video 2, you will understand in practice how the Schottky diode bridge works, observing its behavior in both a low frequency circuit and a high frequency circuit. The first practical class will be observing how the Schottky diode bridge works in a low frequency circuit. For this, a rectifier circuit was assembled with two common diodes in Schottky configuration, which will be powered by the secondary winding of a transformer with a central tap (tap). With the oscilloscope probes connected to the inputs of the diode bridge, it is possible to observe the sinusoidal waves present at the ends of the transformer entering the diode bridge inverted by 180º. This allows each diode in the bridge to conduct whenever the polarity of the electrical network undergoes polarity inversion. The alternating conduction of the diodes of the low-frequency Schottky bridge allows a continuous pulsating waveform, in full wave, at its output, with a frequency of 120 Hz. Measuring the output voltage with a digital multimeter, we find approximately 9V DC, which corresponds to 50% of the input voltage, which is 20V AC. Placing the oscilloscope probe on the cathodes of the diodes that are connected to a common point (which represent the output of the diode bridge), we observe a continuous pulsating waveform, with the value of 9V DC. By adding an electrolytic capacitor to filter this pulsating DC output voltage, the voltage rises to around 13V, since as we know, the capacitor charges with the maximum voltage of the network. With the filter capacitor input into the circuit, the oscilloscope now displays a straight line on the screen, indicating that the output voltage is now pure DC. And to finish the practice of the Schottky diode bridge in a low voltage network, we connect a load (light bulb) to the output of the rectifier and filter circuit and observe that the oscilloscope registered a ripple in the output voltage. Next, we take a switching power supply where we analyze the behavior of one of the two Schottky diode bridges present on this board. To observe the behavior of the Schottky diode bridge on this board, we connect the two oscilloscope probes to their respective anodes and with the digital multimeter we measure the output voltage at the cathode terminal. The oscilloscope indicated a variable continuous wave coming from the secondary winding of the chopper transformer at the inputs of the schottky diode bridge. At the output, the digital multimeter indicated a continuous voltage of approximately 16 V, confirming the perfect functioning of the schottky diode bridge in this switched-mode power supply. I hope that after this series of two videos you have been able to understand both in theory and in practice why the schottky diode bridge only has three terminals and how it actually works in practice, so that from now on you can analyze circuits that have this component with more accuracy and safety. VIDEOS TO COMPLEMENT THE STUDY: SCHOTTKY DIODE BRIDGE: WHY DOES IT ONLY HAVE THREE TERMINALS? • Schottky Diode Bridge: Why does it... SHARE THIS VIDEO WITH FRIENDS: • Schottky Diode Bridge: Understand with... Hello, I'm Prof. Valdenilton, Technical Coordinator of the Electronics courses taught by Technology Cursos. I love transforming people's lives through teaching. My goal is to teach people like you to fix the electronic equipment they love, helping in every way possible. INFORMATION: Our Website: https://technologycursos.wix.com/tech... Business Contact: [email protected] Whatsapp Center: (82) 9 8706-9200 COME SAY HI ON MY SOCIAL NETWORKS: Instagram: / technologycursos Facebook: / technologycursos