0
What else can I help you with?
What is meant by bressless DC motor?
I've not heard the term "bressless" - I think you mean "Brushless" - which is a DC Motor that does not use the usual commutator/brush arrangement. For a great answer to this question, see the Wikipedia article in the related links section.
Why use resistor grids in DC motors?
resistor grids were used in DC MOTORS during dynamic braking. in this method of braking a resistance ( variable) is connected across armature winding so as to dissipiate the energy. the energy thus dissipiated is used for braking of motors.
Braking characteristics for ac and dc drives?
There are many electronic ways to brake AC and DC motors the construction of the motors also influence the braking alternatives that can be chosen.most AC motors can by braked very effectively with a short burst of DC, this locks up the motor very rapidly but may take its toll on the DC supply components , rectifiers contractor's etc. Obviously as its stalling the motor it may also have physical consequences on the mechanical parts involved as well.An AC car wheel balancer as seen in tyre fitting shops often use DC to slow the motor then also use DC to hold the motor while the operator adds weights.DC motors can generally be braked by using them as generators, a good example is the regenerative braking systems being designed into modern hybrid vehicles, In a sense they are being used as generators to recharge the battery system.Until the batteries are fully charged this can be arranged so it is almost as effective as shorting out the motor to magnetically lock it up, there has to be a bit of dynamic impedance matching so that the motor sees a very low impedance,Some motors such as stepper motors have some inherent braking, if you take a small stepper motor from an old printer you will feel as it rotates it steps to the next position, this can be easily exaggerated by twisting the drive wires together to short out the stepper,The permanent magnet within the stepper tries to become a generator into the shorted coils and will often lock the motor solid.
What is the different between ac dc motors?
DC Motor works on DC source and AC motor works on AC source
Fan works on ac or DC?
It depends on the motor. The fan is driven by an electric motor, and it can use a dc motor (as in a car) or an ac motor (as in a house). They are not interchangeable.
What is dc injection braking for ac motors and how does it work?
works with the concept of DC injection braking, where a dc volt is injected into a three phase rotating magnetic field which causes a stagnet magentic field thus bringing the motor to a complete halt.
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 )
What is meant when the nameplate reads DC motor?
It means that the voltage that supplies the motor has to be a direct current source.
What is the most effective braking method for ac motors?
DC injection breaking where a DC voltage is applied to the motor's coil windings.See sources and related links below.
What are the different types of braking in dc motors?
plugging rheostatic or dynamic braking regenerative braking
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 is meant by bressless DC motor?
I've not heard the term "bressless" - I think you mean "Brushless" - which is a DC Motor that does not use the usual commutator/brush arrangement. For a great answer to this question, see the Wikipedia article in the related links section.
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.
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.
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.
