Forwarded from Engineering Update
In an alternator, frequency is determined by which of the following?
Anonymous Quiz
7%
Motor size
56%
Rotation speed of the armature
11%
Voltage
25%
All of the above
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Choosing the right semiconductor device becomes easier when you see how each one controls current and power.
✨✨A BJT is a current-controlled device where a small base current regulates a larger collector current, making it useful for amplification and basic switching.
✨✨An FET is voltage-controlled, so the gate voltage changes channel resistance with almost no input current, which improves efficiency and input impedance.
✨✨An IGBT combines the easy gate control of a FET with the strong output handling of a BJT, making it common in motor drives and high-power converters.
✨✨A thyristor works differently: a short gate pulse turns it ON, and it stays latched until current drops below a limit, which is ideal for controlled rectifiers and AC power control.
Seeing these differences side by side builds clear intuition about when to use each device in real electronic and power circuits.
#ElectronicsEducation #PowerElectronics #Semiconductors #BJT #fet #thyristor #IGBT
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✨✨A BJT is a current-controlled device where a small base current regulates a larger collector current, making it useful for amplification and basic switching.
✨✨An FET is voltage-controlled, so the gate voltage changes channel resistance with almost no input current, which improves efficiency and input impedance.
✨✨An IGBT combines the easy gate control of a FET with the strong output handling of a BJT, making it common in motor drives and high-power converters.
✨✨A thyristor works differently: a short gate pulse turns it ON, and it stays latched until current drops below a limit, which is ideal for controlled rectifiers and AC power control.
Seeing these differences side by side builds clear intuition about when to use each device in real electronic and power circuits.
#ElectronicsEducation #PowerElectronics #Semiconductors #BJT #fet #thyristor #IGBT
#like #share #support 👍😍💥🔌🔋🔋
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A DC power supply converts AC (alternating current) into stable DC (direct current) that electronic circuits can use. This process happens in three main stages: rectification, filtering, and regulation.
First, the AC input (for example, 120V, 60 Hz) enters the rectifier circuit. Here, a bridge rectifier made of four diodes (D1–D4) converts the sinusoidal AC waveform into pulsating DC. Instead of going positive and negative, the output now stays on one side of the axis, but it still has ripples.
Next, the smoothing circuit reduces these ripples.
Finally,
the regulator circuit provides a stable and fixed DC output. An IC like the LM78xx series maintains a constant voltage even if the input fluctuates or the load changes. Capacitors C3 and C4 improve stability and reduce noise at the input and output of the regulator.
The final output (Vout) is clean, steady DC voltage suitable for powering electronic devices, with the negative terminal connected to ground.
#Electronics #PowerSupply #Rectifier #VoltageRegulator
First, the AC input (for example, 120V, 60 Hz) enters the rectifier circuit. Here, a bridge rectifier made of four diodes (D1–D4) converts the sinusoidal AC waveform into pulsating DC. Instead of going positive and negative, the output now stays on one side of the axis, but it still has ripples.
Next, the smoothing circuit reduces these ripples.
Finally,
the regulator circuit provides a stable and fixed DC output. An IC like the LM78xx series maintains a constant voltage even if the input fluctuates or the load changes. Capacitors C3 and C4 improve stability and reduce noise at the input and output of the regulator.
The final output (Vout) is clean, steady DC voltage suitable for powering electronic devices, with the negative terminal connected to ground.
#Electronics #PowerSupply #Rectifier #VoltageRegulator
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