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ac machines can run only in one direction but dc machines can run in both the directions depending upon the direction of current flow into it. If we change polarity of input supply we can reverse the direction of motion of dc machine
CommentThe above answer isn't altogether true, as it's very easy to change the direction of an AC machine. For example, to change the direction of rotation of a three-phase induction motor, the motor controller interchanges two of the three line conductors.
The main difference used to be that the speed of DC machines is easier to control, but that is a thing of the past thanks to developments in electronic motor controllers.
What else can I help you with?
What is the difference between ac ammeter and dc ammeter?
dc ammeter has three connecting pins while ac has four
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A chopper to chop DC into AC is an electronic switching. Digital is data bits or machine language whereby a processor can make decisions
Difference between dc load line and ac load line?
well the difference mainly exists in the method of finding them , these are :-1. in finding DC load line :-open all AC sourcesopen all the capacitors2. for AC load line:-open all the Dc sourcesshort all the capacitors.
Derive emf equation of a DC machine?
equation of ac machine
How AC is converted into DC in welding machine?
rectifyer
What is the difference between AC and DC choke?
There is no difference between AC AND DC chockes
What is the difference between ac and dc grounding?
The difference AC and DC grounding is that AC is alternate current and DC is direct current. Grounding for both AC and DC is the same.
What is the difference between in ac and dc powwer cable?
There is no difference in the cables. The only difference is the type of electrical power being transmitted. AC or DC applications use the same wires.
What the difference between AC and DC?
AC rises with respect to time but DC is steady.
Difference between magneto and ac generator?
magneto is dc
What is the difference between ac ammeter and dc ammeter?
dc ammeter has three connecting pins while ac has four
What is main difference between ac power and dc power?
AC power is made by alternating current and DC does not change.
What is the difference between current (DC) and alternating current (AC)?
ac comes directly from the power socket, and DC is battery source. Answer2: The frequency is the difference, AC has frequency f>0 and DC does not f=0.
What makes a dc bulb different from an ac bulb?
The voltage source that is applied to them is the difference between AC and DC light bulbs.
What is the difference between a voltage converter and a voltage inverter?
Converter is AC to DC. Inverter is DC to AC
What is difference between magneto and AC generator?
a magneto puts out dc electricity
Difference between AC and DC generator?
The major difference between an AC generator and a DC generatoris that the DC generator requires a mechanism to provide a DC output. This can be done mechanically with a commutator or electronically with a rectifier. Internally, all generators produce an alternating voltage. Allgeneratorsrequire a magnetic field.
