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DC Current PWM-Controller. Circuit Engineering

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DC Current PWM-Controller. Circuit Engineering. Pulse-width modulation is a method of voltage control that today is used quite extensively. PWM-signals are for the most part used to control motors and pulse power supply units. This purpose is served by a number of control circuits: transistors, special microcircuitry, digital signal processors. As a rule, a transistor, often a FET, is used to control the generated PWM-signal. Widely popular are the width-pulse circuits that control powerful field-effect transistors - MOSFETs. These transistors are capable of switching high current of up to 100A and above at the gate voltage of 12-15V. The on-state transistor resistance is very low, which decreases the dissipated power. Control circuits are supposed to provide for at least 12V-15V difference between the gate and the source. In some cases, PWM-controllers employ microchips with output voltage build-up of up to 25-30V at 8-14V supply voltage, which facilitates connection of the transistor in the circuit with the common drain. For the majority of loads with current consumption of below 10A the circuits do not have an additional voltage build-up unit. Let's look at an example of PWM-controller using a simple circuit based on the logical CMOS microchip inverters. The device is a square-wave generator based on two logical components, where the diodes separately change the electric charge time constant and the electric discharge time constant of the capacitor that sets the frequency. It is this property that enables changing the output pulse ratio and the value of the output voltage on the load. The circuit uses an inverting CMOS component K561LN2, a field-effect transistor that should better be applied with peak current, since it has a lower on-state resistance. This helps decrease the dissipated power and use a cooler with a smaller footnote. The main benefit of this circuit is the simplicity of the structure and reliability of operation.
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Text Comments (21)
Ariel DHCKOMID (2 months ago)
Please upload scheme layout pcb
Roland Berendonck (6 months ago)
Nice idea. And where, did you say was the link to to this circuit?
Dakalo Ramokgopa (1 year ago)
There was no current control in this video.
vincent avesato (1 year ago)
To m try an isolator ic
urmila sharma (1 year ago)
Jimmeh B (1 year ago)
the fuck has this got to do with current control???
fist fucker (2 years ago)
the voice is creepy af
Sajid Khan (2 years ago)
how incries pwm ampire and frequency
raony dantas (3 years ago)
you can send me to my e-mail the complete scheme of this controller 144v 300amp [email protected]
Mehmet Fatih Albayrak (3 years ago)
pcb ?
Safa Macidov (3 years ago)
this pwm have circuit?
Sss Ttt (3 years ago)
Good video,  but it is much better to follow if you would just mute the original voice
Safa Macidov (4 years ago)
hello dears this pwm controller not circuit schema?
davs ky (5 years ago)
great work!!!
baianoise (5 years ago)
Hi1 Just do a search in the eBay: DC DC step down converter You will find a little, simple an cheap board the will do the trick! Thank you, and best regards !
ahmad juliandi (6 years ago)
sir. PWM can help me about more ...?
mjb0072012 (6 years ago)
Hello, I have a stator with 40 VAC on a cam for trigger pulse, we need to convert this to 18 VDC pulse for a trigger. What is best device for this???
Alex Tarasov (6 years ago)
ElecAlgeria elector (6 years ago)
PWM-Controller ??????????????,
jose gpe reyes (7 years ago)
this As kit job in Mexico has to move 30-230VAC motors and mechanical power 50hp between 20 and 50 amps to send me a quote [email protected] on behalf of Jose Guadalupe q roo kings cancun mex thanks for all the great Moror intslacion instructional use of bank and research

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