How to build Pulse Width Modulation DC Motor Control

this circuit diagram belongs to Power category.




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.

Circuit diagram

Parts
R1 1 Meg 1/4W Resistor
R2 100K Pot
C1 0.1uF 25V Ceramic Disc Capacitor
C2 0.01uF 25V Ceramic Disc Capacitor
Q1 IRF511 MOSFET or IRF620
U1 4011 CMOS NAND Gate
S1 DPDT Switch
M1 Motor (See Notes)
MISC Case, Board, Heatsink, Knob For R2, Socket For U1

Notes
1. R2 adjusts the speed of the oscillator and therefore the speed of M1.
2. M1 can be any DC motor that operates from 6V and does not draw more than the maximum current of Q1. The voltage can be increased by connecting the higher voltage to the switch instead of the 6V that powers the oscillator. Be sure not to exceed the power rating of Q1 if you do this.
3. Q1 will need a heatsink.
4. Q1 in the parts list can handle a maximum of 5A. Use the IRF620 for 6A, if you need any higher.

Author:
Email:
Website: http://www.aaroncake.net/

Similar diagrams

High And Low Voltage Cut Off With Time Delay circuit diagram
High And Low Voltage Cut Off With Time Delay
Receiver Battery Low Voltage Alarm circuit diagram
Receiver Battery Low Voltage Alarm
Voltage Monitor circuit diagram
Voltage Monitor
Precision Receiver Battery Low Voltage Alarm circuit diagram
Precision Receiver Battery Low Voltage Alarm
Low Voltage Alarm circuit diagram
Low Voltage Alarm
Solid State Power Controller circuit diagram
Solid State Power Controller
AC Current Monitor circuit diagram
AC Current Monitor
Self-powered Fast Battery-Tester circuit diagram
Self-powered Fast Battery-Tester
Important!!!
We are not responsible for any injuries or damage caused by information from this website! Working with electricity is dangerous for your life, especially diagrams related to high voltage! We do not guarantee success in building devices using our diagrams! They are not tested by us. For questions about diagrams use author info below diagram or our contact page. Thank you!