Home / Synchronous Machines

Synchronous Machines

Stepper Motor Types and Working

Stepper motors are close relatives of brushless DC motors. The brushless DC motor is used where continuous motion is required, such as a fan or a disk drive. The stepper motor, on the other hand, is designed to move infinite increments (steps) in either direction and to keep track of …

Read More »

Electric Machine Efficiency and Losses

Regardless of which type of electric machine is chosen for a particular job, efficiency is important for several reasons. First, and perhaps most obvious, a less efficient machine will cost more to operate. Second, the losses in the machine are converted to heat, which raises the operating temperature of the …

Read More »

Synchronous Machine as Generator and Motor

Figure 1 shows a cross-sectional view of a salient-pole synchronous machine. The armature windings are shown as concentrated windings, but in reality, they would be distributed. Such machines can be operated either in Motor or Generator mode. Motor Operation For motor operation, a balanced three-phase set of voltages is applied …

Read More »

AC Motor and Generator Working Principle

Figure 1 shows a simple, single-turn, permanent- magnet machine. The single-turn coil is free to rotate between two magnetic poles of opposite polarity. Magnetic flux goes from a north pole to a south pole, so there will be magnetic flux in the region between the poles where the coil is …

Read More »