1. The function of interpoles in DC machine is to: Reduce field winding heating Reduce losses Compensate for airgap variation Improve commutation 2. The narrow poles placed in between the main poles of a DC machine are called ______ Intrapole Interpole Small Pole Large Pole 3. Direct current machines are attached with inter-poles …
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1. The emf equation of DC generator is E Øp/nza Øp60/nza Øpa/60nz Øpnz/60a 2. A 220 V separately excited dc motor takes 20 A and the armature resistance is 1.0 Ω. If the armature constant KaΦ = 1.5 rad/sec, the speed of the motor is 1000 rpm 2000/π rpm 3000/π rpm 4000/π rpm …
1. In DC generator on load, the air-gap flux distribution in space is Sinusoidal Triangular Pulsating Flat-topped 2. To speed up the commutation process ______ must be neutralized. Reactance Voltage Armature current Field Current Armature Reactance 3. In DC machine time of commutation decreases with: Increase in width of commutator segment Increase in …
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Losses in DC machine A DC machine is an electromechanical energy conversion device. It can convert mechanical power into DC electrical power and is known as a DC generator. On the other hand, when it converts DC electrical power into mechanical power, it is known as a DC motor. According to the law of conservation …
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