| Author | Views | Views Today | Rank | Comments |
| 111,613 | 353 |   |
69 |
| Author | Views | Views Today | Rank | Comments |
| 111,613 | 353 | |
69 |
| Often, people attempt to control DC motors with a variable resistor or variable resistor connected to a transistor. While the latter approach works well, it generates heat and hence wastes power. This simple pulse width modulation DC motor control eliminates these problems. It controls the motor speed by driving the motor with short pulses. These pulses vary in duration to change the speed of the motor. The longer the pulses, the faster the motor turns, and vice versa. |
Schematic |
Parts |
|
Notes |
Related Circuits |
Comments |
| help me about control motion of DC MOTOR every motion one degree every 4 mintes tanks | ||
| Can this PWM technique be used to control speeds of higher power motors using SCRs/TRIACs | ||
| There are enough PWM circuits around the internet based on the 555 for anyones handy use. Size the output transistor ( ideally a power FET ) for whatever you are driving, and limit the supply to the 55 to about 15vd max, Its not too particular about it's supply being ' well regulated' the whole point of it's design! | ||
| Hi.. Im doing the project on the topic mentioned.I want some theory for the chopper fed with uncontrolled rectifier and controlled by a PWMsignal... | ||
| are there any examples with CMOS cd4016 switches. specifically, various events at timing sequences[ 1 minute, 2 minutes so on] are activated...with the switch in question. | ||
| for a class project i have to build a go cart that has a car starter motor on it would this be the thing to use??? keeping in mind that the car starter motor kan draw up to 700 amp at peak!!!!!! thanx for ur help !!!! | ||
| this is a pulse FREQUENCY motor speed controller, not Pulse width. you are only varying the frequncy of pulses , and it will always operate at 50% duty cycle. | ||
| So how do we to go about doing a PIC based PWM motor speed controller? Any schematics to help ? thx! | ||
| This circuit does not produce PWM. The two Cmos inverters are connected as an ordinary variable frequency oscillator. The motor will receive a square-wave so will run at about half power. Changing the frequency will change its power a little because of its inductance. When the pot is shorted then the motor will jump to full speed or will stop. | ||
| nice one | ||
| The last 10 comments are currently shown. Show All Comments. |
If you would like to leave a comment, you can do so using the form below. Comments can be things like suggestions, successes or failures, improvements, similar circuits, error reports, an answer to a previous commenter's question, or anything in between. However if you would like to ask a question it is suggested that you use the forum instead. The forum provides a more robust environment for discussion.
Important: If you post a technical question here, there is no guarantee it will be answered. All technical questions should be posted to the forum. The owner of this site generally does not answer questions in comments.
All comments are subject to approval before they are displayed here, so your comment will not appear immediately. This is done mainly to prevent spam and other abuse. If you wish to remain anonymous, simply enter "anonymous" for your name and/or email.