But controlling the speed of an AC motor is a little difficult then DC motor. Since it mainly depends on the input frequency, we use a device called VFD variable frequency drive to vary the input supply frequency to the motor. They are also called AC motor drives. Their direction is controlled by changing the polarity of only starter winding. It is a type of electrical machine that converts DC electrical energy into mechanical energy. The armature of the DC motor is made of multiple conductor windings.
It is placed inside a housing made for a permanent magnet that generates the magnetic field. The armature carries the direct current supplied by any DC source such as batteries. The magnetic field interacts with the current-carrying conductors of the armature. Thus the armature experiences a mechanical force. Therefore, they are called Brushed DC motor. In such motors, the input is applied to the stationary part thus it does not require brushes or commutator.
It helps in increasing the performance of the motor as well as its efficiency. You may also know more about stepper motors and servo motors in the previous details posts.
The speed of the DC motor can be easily controlled by varying the input voltage. One simple method of controlling the input voltage is PWM pulse width modulation. The direction of the DC motor reverses by changing the polarity of the input DC supply.
But their frequent maintenance is very costly. Just call me roger fron the philippines. I need your help maybe you can discourage me to my project. Your email address will not be published. Notify me of follow-up comments by email. Notify me of new posts by email. If we talk about the major difference between DC and AC motor is the commutator and one can easily differentiates and identify either is it an AC motor or DC motor. Electrical Technology 3 6 minutes read.
Have a longer life span. Have a shorter lifespan. AC motors require effective starting equipment like a capacitor to start operation. DC motors do not require any external help to start operation.
Have three input terminals. Have two input terminals. AC motors are late responsive when there is a change in the load. DC motors are fast responsive to the change in load.
AC motors are applicable to the need for high speed and variable torque. DC motors are applicable to the need for high torque and variable speed. The speed of AC motors is simply controlled by varying the frequency of the current. Applied for large industrial usage. Applied for small domestic usage. Quick Links. Home Blog Contact Us. Social Media. Facebook Linkedin. Some of their other advantages include:. AC motors are generally considered to be more powerful than DC motors because they can generate higher torque by using a more powerful current.
However, DC motors are typically more efficient and make better use of their input energy. Both AC and DC motors find application in processes and facilities in almost every industry. Some of the most common industrial applications for AC motors include:. We are also an authorized factory warranty center. For help selecting the right electric motor or industrial assembly for your application, contact us or request more information today to receive a quote. A Guide on Electric Motors.
0コメント