DC Motor Speed Control Potentiometer
DC motors are widely used in many industrial and consumer applications, where precise control over their speed is often required. The speed of a DC motor is determined by several factors, including the applied voltage, the current through the field winding, and the armature resistance. One of the most common methods for controlling the speed of a DC motor is by using a potentiometer, which is a simple electronic component that allows you to vary the voltage applied to the motor's armature.
Overview of potentiometer and speed of DC motor
DC (direct current) motors are essential components in many industries and applications, ranging from small household appliances to large industrial machinery. In most cases, it is crucial to control the speed of the motor according to the requirements of the task. This is where the DC motor speed control potentiometer comes into play. A potentiometer is an electrical component that can be used to vary the voltage applied to the motor, thereby controlling its speed.
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| Install a potentiometer to change the speed of the DC motor |
🔺 The speed of a DC motor can be determined by the following equation:
N = K(V – IaRa)/ø
Where N is the speed of the motor, K is a constant, V is the voltage applied to the motor, Ia is the current flowing through the armature, Ra is the resistance of the armature, and ø is the flux of the motor. As per this equation, there are three ways to control the speed of a DC motor: by varying the magnetic flux and current through the field coil, by varying the armature voltage and armature resistance, and by varying the supply voltage.
🔺 When it comes to method 2 and 3, a potentiometer can be used to control the armature voltage and supply voltage, respectively.
In method 2, the potentiometer is connected in series with the armature circuit, and by varying the position of the potentiometer wiper, the voltage applied to the armature can be varied. This, in turn, varies the speed of the motor. The potentiometer acts as a variable resistor, and its resistance can be varied by changing the position of the wiper. This changes the voltage drop across the armature and, therefore, the motor speed.
In method 3, the potentiometer is connected in series with the supply voltage. By varying the position of the wiper, the voltage applied to the motor can be varied, which changes the motor speed. In this case, the potentiometer acts as a voltage divider, and its position determines the voltage that reaches the motor.
The DC motor speed control potentiometer is a simple and effective way to control the speed of a motor. It is easy to install and use, and it allows for precise control over the motor's speed. However, it is essential to use the right type of potentiometer for the application. The potentiometer's power rating should be high enough to handle the current flowing through the circuit, and it should be designed for use with DC circuits.
The DC motor speed control potentiometer is an essential component in many applications where precise motor speed control is required. It offers a simple and effective way to vary the voltage applied to the motor, which, in turn, changes its speed. Whether used in method 2 or method 3, the potentiometer is a versatile device that can help optimize the performance of DC motors.
Learn more: Variable Speeds For DC Motors
Example: How to change speed of dc motor using potentiometer?
🔺Problem: I want to change the speed of a DC motor(12V,2000RPM) using a pot and operate a table fan(where I've replaced its AC motor with DC).Now the problem is I get a regulated output at o/p of 7812 but not after connecting the pot(10k)! Need ua help guys! Thanks!
🔺The answer:To use your 10K pot you can use it for R2 and change R1 to 1.2K ohms. It will not work correctly without the fan connected because the load current will be too low for the LM317 to regulate.
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| DC Motor Speed Control Potentiometer |
Adjustment range (with fan connected) should be 1.25 to around 12V, assuming at least 14V in. Check it doesn't get too hot- you might have to add a heatsink or bolt it to something- at least you have a fan to cool it.
Related: DC Motor Control Circuit Diagram
DC Motor Speed Control Potentiometer for sale
If you are looking to buy a DC motor speed control potentiometer, there are several options available on e-commerce markets. These potentiometers come in various shapes, sizes, and power ratings, and choosing the right one for your application is essential. It is recommended to consider the specifications of the potentiometer carefully before making a purchase, such as its power rating, resistance range, and type of construction. You should also ensure that the potentiometer is designed for use with DC circuits, as using an AC potentiometer with a DC motor can result in damage to the motor or the potentiometer itself.
It is also important to buy a potentiometer from a reputable seller, who can provide you with accurate product information and after-sale support if needed. Before making a purchase, you can read reviews from other customers who have used the product, and check the seller's rating and feedback to ensure a smooth and reliable buying experience. By choosing the right potentiometer and seller, you can ensure that your DC motor runs smoothly and efficiently, with precise control over its speed.
🔺List of DC Motor Speed Control Potentiometer for sale:
1/ 10A 5V-16-12V DC Motor Speed Control Potentiometer Governor PWM Switch Module ($3.18)
12/ DC Motor Speed Control Potentiometer from dealers and production facilities ($0.45 to Max).
🔺Good books on DC induction motors and generators:
🌀 Classical Electronics: 👉 Application of Back EMF conversion in DC motors and AC generators to generate generators (create a self-powered, free-energy generator)
💠 Harnessing the power of back electromagnetic fields (Back EMF)
💠 Back EMF generates Lenz's Force in generator 💠 When the output energy is not affected by the Lenz (free) force, a self-powered mechanism will be established from the AC generator head to the induction motor. And the kinetic energy of the induction motor at that time was only supposed to stir the Ether by Nikola Tesla's "Rotating Magnetic Field". That's the mechanism for a Free Energy AC generator - no fuel needed - Self-powered generator.
AC generator without fuel: Simple Energy Hack KILLS Power Bills And Generates Power On Demand
Free Energy AC generator 👆
