Questions tagged [ac-dc]
Questions regarding the safe and effecient design and implementation of AC voltage to DC voltage supplies. Typically Mains to some lower DC voltage.
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NiMH battery charging problem
I have a battery (8 cells in series, NiMH AA cells (1.2 V to 1.3 V), 1300 mAh per cell).
Cells used-
https://www.amazon.in/Rechargeable-NiMH-2300-Peak-Power/dp/B01MF8HUKO
https://www.amazon.in/...
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Is there a 3-phase to DC converter that draws current proportional to voltage?
Of course, 3-phase alternating current can be converted into a rippling direct current with a 3-phase bridge rectifier.
This design only draws current from the two phases with the most voltage ...
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What AC/DC adapter do I need to power 10 high-power (3W) LEDs?
I'm attempting to build a near-infrared (850 nm) lamp using high-power LEDs and am struggling to design a suitable way to power them directly from the AC power plug (220V).
I have 10 high-power LEDs ...
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Which power source is good for my project?
I want to create an inverter LED light source. I would be using 2 COB LED lights rated at 4 volt DC, 8 watt. My idea is that when the phase is connected, I want the light to glow and at the same time ...
user357345
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Single Phase Active PWM Rectifier using MOSFET
I am using this H-Bridge Configuration to make active PWM rectification to control the output average Voltage by controlling the Modulation Index.
Here is the circuit diagram and the pulses of each ...
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AC and DC inputs to a Power Supply
I am studying about power supplies and I need some help with the following. I have a power supply with a 12 V DC output to power the lower power controller electronics. This power supply has two ...
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How does an AFE boost voltage?
I have an active front end unit that is connected to a 3 phase system. It's controlled via software and I can set a value for the DC bus voltage.
When the input is the AC 3-phase, how does this ...
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Transistor specs in the capacitance multiplier
I'm working on a constant current power supply and as a first step designed the following rectifier with a filter. I know the bottom rectifier is inactive, but with couple of switches the circuit ...
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How to convert 240 V single phase to 300 A 12 V DC
Residential situation with mounted 2-ton hydraulic 12 V crane.
Have 120/240 available, need to create 12 V 300 A available power for intermittent use, boat launch. Average power used 150 A 12 V DC, ...
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Powering up an AC-DC power supply under load
Is it safe to power up a AC-DC power supply while it is connected to a load?
Specifically what I'm trying to do is replace an AC espresso water pump with a 24V/2A Brushed DC water pump. Additionally a ...
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Full Bridge Rectifier Schematic Analysis
I am working on a circuit of an old 90's Terminal Applicator and noticed it has AC power coming in, then stepped down with a transformer, and then going to a pair of full bridge rectifiers. One goes ...
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Flyback converter MOSFET driver
I am building a flyback converter to convert 230V AC to 20V DC using a microcontroller. So far my simple converter works, but I have to power the MOSFET driver such as HCPL-3101 from a secondary DC ...
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How are modern ACDC power supplies desgined?
I wonder about how exactly modern, but mundane ACDC power supplies (your phone power supply) are designed. Maybe my misunderstanding comes from one of the following assumptions:
Modern AC-DCs ...
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Best placement of bridge rectifier to allow DC/DC convertor to become AC/DC convertor. Does this inhibit surge and EMI performance?
I am trying to use the power supply: CQB50W12-72S12 with AC power without degrading the performance of its recommended filter and surge components. 120VAC peak voltage is 169V and I am worried that ...
user298907
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PCB inside metal chassis. Is chassis ground required?
I have a project that has a PCB housed in a metal enclosure. The PCB is powered by a USB-C connector. Power input is 20 V DC @ 4 A max. Power is sourced from an isolated AC/DC wall wart adapter. The ...
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