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Excellent speed regulation is characteristic of this design which lends itself well to speed control by variation of the field current.
Separately excited DC motors can race to dangerously high speeds (theoretically infinity) if current to the field coil is lost. Because of this, applications should include some form of field current protection as an unprotected motor could literally fly apart.
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What is excitation of a DC motor?
DC Voltage
How do you differentiat dc motior and ac motor physicaly?
if you power an ac motor with dc or a dc motor with ac you will likely start smelling smoke and the motor will be damaged. If the motor is marked "3-phase", "shaded pole", or "induction" it is an ac motor! BTW, there are ac/dc motors that will run on both, they are wound very much like dc motors but a bit differently.
Why dc series motor are use in train?
due to high starting torque and droping charactristics
Can you convert a DC motor to run on AC?
The easiest way would be to convert the AC power to DC by using a rectifier diode and a filter capacitor. In that way you can now run your DC motor on DC.
Why a DC motor is called DC motor?
DC, in DC motor, is an acronym for Direct Current, which means that it works on direct electrical supply by a battery. In an AC motor, the motor runs on Alternating Current Supply from other sources other than batteries, such as electricity from your house.No, d.c. is not an acronym. It is simply an abbreviation."a word formed from the initial letters or syllables taken from a group of words"http://www.thefreedictionary.com/acronymYes, a word. "dc" is not a word.
Is a DC motor single excited or double excited?
It is doubly excited if it is sparately excited dc motor, singly excited if it is self excited machine
Why synchronous motor called double excited motor?
AC and DC supply sources we are given to motor so we are called double excited motor
What motor is NOT suitable for use as a DC machine?
What motor is NOT suitable for use as a DC machine?
Give 5 types excitation of DC motor?
there are 2 different types f excitation 1 seperately excited 2 self excited
Would the motor turn if only the armature were excited?
A motor will turn when only the armature is excited, if there is enough residual magnetism in the field.
What type of DC motor fan use?
shunt type dc motor use in train fans
Can you use dc motor to power hydro turbine?
no you can't use dc motor to power hydro turbine ?
How does a DC brushless motor work?
To state it simply, a DC brushless motor is not a DC motor. It is an AC motor with an inverter (or electronic commutator) on the front end to make the AC, so you can use a DC input.
What happens if load torque is same at full speed in separately excited dc motor?
Same as what? at maximum speed and torque, the motor delivers maximum power.
What is the best dc motor to use when building a wind generator?
A brush-less DC motor (BLDC)
How you control the speed of self excited dc generator?
Easy. By controlling the speed of the motor or whatever is turning the generator's shaft.
Is torque and current proportional?
Sometimes, for example in a separately excited dc motor. But in a series-wound dc motor the torque is proportional to current-squared, which gives the motor a very high starting torque and this makes series motors very popular for traction.
