Squirrel cage motor
we can either use dc series motor or induction machine ,but dc supply is not easily available so we use induction motor ,
swinburne's test on dc shunt machine is to predetermine the efficiency of the dc machine , but it is not accurate it is just like estimation of efficiency of dc shunt machine when it is run as a motor and a generator............................
capacitor start motor
dc series motor
A DC motor is an electric motor that runs on direct current (DC) electricity. A DC motor is designed to run on DC electric power. Two examples of pure DC designs are Michael Faraday's homopolar motor (which is uncommon), and the ball bearing motor, which is (so far) a novelty. By far the most common DC motor types are the brushed and brushless types, which use internal and external commutation respectively to reverse the current in the windings in synchronism with rotation.
What motor is NOT suitable for use as a DC machine?
we can either use dc series motor or induction machine ,but dc supply is not easily available so we use induction motor ,
DC series motor is suitable for the tractions
swinburne's test on dc shunt machine is to predetermine the efficiency of the dc machine , but it is not accurate it is just like estimation of efficiency of dc shunt machine when it is run as a motor and a generator............................
You need suitable DC power source to run it.
PMBLDC machine is actually an ac machine and due to power electronics components it's output is dc ,so therefor it is called 'dc'
capacitor start motor
dc series motor
A DC generator is a DC machine that is driven by an external rotating force. It is constructed the same as a DC motor.
A shunt-wound DC motor can maintain its speed well when the load torque varies.
shunt type dc motor use in train fans
It is doubly excited if it is sparately excited dc motor, singly excited if it is self excited machine