A DC motor is an electrical machine which converts electrical energy into mechanical energy. The working of DC motor is based on the principle that when a current carrying conductor is placed in a magnetic field, it experiences a mechanical force. Learn everything related to DC Motor from this page.
There are several tests that are conducted for testing a dc machine...
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Unlike Generators and Transformers, Electric Motors are rated in kW instead of kVA. We have already discussed why electric transformers are rated in kVA. This article explains why electric motors are rated in kW. We know that, kVA = Voltage×Current kW
In this post, we will look at the voltage and power equation of a dc motor and the condition for maximum power in a dc motor. Voltage Equation of a DC Motor The voltage V applied across the motor armature
There are several tests that are conducted for testing a dc machine (generator or motor) to judge its performance. The most important performance tests to be conducted on the dc machine are: The magnetization or open-circuit test. The load characteristic.
Swinburne’s test is the simplest indirect method of testing dc machines. In this method, the dc machine (generator or motor) is run as a motor at no-load and losses of the machine are determined. Once the losses of the machine
Before going to the operation and characteristics of split-phase induction motor we should first understand why single phase induction motor is not self-starting. To make a single-phase induction motor self-starting, we should somehow produce a rotating magnetic field. This may be
The different methods of speed control in DC shunt motors are explained below, Flux Control Method Armature Control Method Voltage Control Method Multiple Voltage Control Ward Leonard System Related Topic : Speed Control of DC Series Motor Flux Control Method
Speed control of dc motor is achieved using different methods. There are three types of dc motors. For each of them, there are different methods of speed control. Each of them is discussed in this article. The principal advantage of
Single-phase motors are the most familiar of all-electric motors because they are extensively used in home appliances, shops, offices etc. It is true that single-phase motors are a less efficient substitute for 3-phase motors but 3-phase power is normally not
Insulation Resistance or IR Test is carried out by maintenance engineers to ensure the healthiness of the overall insulation system of electrical equipment. It reflects the presence or absence of harmful contamination, dirt, moisture, and gross degradation. IR value will
There are two types of DC motors – Brushed DC motor and Brushless DC motor. The direction of rotation of these motors is controlled by different methods. Brushed DC Motor Low Voltage DC motors The small DC motors (which has
A DC motor can be made using different types of armatures based on its application. There are 2 types of armatures. Gramme Ring Armature Drum Wound Armature Gramme Ring Armature The Gramme-ring armature is constructed by winding an insulated wire
Electric Motors need maintenance regularly in order to avoid failure and prolong their lifespan. Generally, motors and motor parts should be maintained and tested at least every 6 months. Then only it is possible to maintain a motor’s life and
Compensating Windings and Interpoles are one of the important step taken to minimize the undesirable effect of armature reaction in dc machines. Armature reaction causes many undesirable effects on a DC machine such as sparking on brushes. So, necessary steps
To understand the concept of armature reaction in DC generator, please go through the previous articles describing the construction of a DC generator. The concept of armature reaction is well explained in this article. What is Armature Reaction? Armature reaction occurs
An amplidyne is an electromechanical amplifier with the characteristics of a rotating machine. It was invented prior to the second world war by Ernst Alexanderson. An amplidyne is a special-purpose DC generator. It comprises an electric motor that turns a
Like DC generators, there are different types of DC motors characterized by the connections of the field winding in relation to the armature. They are Shunt Wound DC Motor Series Wound DC Motor Compound Wound DC Motor Short Shunt Connection