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In case of 1phase
the reverse torque is obtained by reversing the current either in armature or field
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∙ 11y ago
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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.
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.
What would cause a meter to read negative voltage across a DC motor?
A DC motor generates power when it is rotating even when no supply is connected.
What is the formula for changing the rotational speed of a dc motor during plugging?
e=mc2
Why do we connect a transistor to a DC motor?
Transistors are not normally connected to dc motors, but it is possible to use transistors in a speed-control mechanism for a motor.
What is the meaning stall in dc motor?
This is when the rotor (Shaft of the motor) Stalls, normally due to overloading, bearing failure
What is the explanation for the working principle of gear motor?
the gear motor is normally worked by induction and DC motor the gears is the worked of change in motor function
Why should you not use dc motor in fans?
yes. we can use...but normally generated power is Ac. so availability of dc is require a converter..
What type of ac motor will operate at a constant speed from no load to full load?
The Synchronous motors will operate at a constant speed from noload to fullload. Even it is classified as an AC motor, we have to fed the motor both AC and DC supplies. That we have to supply DC to the Field (Normally Rotor) and AC to the Armature (Normally Stator).
What is a DC shunt motor?
A DC shunt motor is a motor using DC supply with the the inductor connected parallel to the armature.
What are uses of bidirectional dc motor?
6V dc motor
What is dc motor with synchoronous operation?
A synchronous motor is an ac motor that does not run on dc.
What is electric braking of DC motors?
In a dc motor, when the supply is suddenly turned off, there is a suddenly fall of speed in motor. this is reduced by means of electric effect. Hence it is called electric braking ( By @FarajAlyami electric motor braking has two types 1- electromechanical 2- electrical but electrical has some types as : 1- regenerative 2- dynamice 3- plugging ( counter - current )
Can a DC dynamo act as a DC motor?
Yes it can and the otherway aroud a DC motor can be used as a dynamo
Can DC series motor work on ac and DC and why?
A dc series motor can work on dc and ac because dc motors are totally reversible.
