Parvovirus B19. Parvovirus B19 infections in children present as a viral exanthema, and in adults as a cause of arthralgia and arthritis. The incubation period is 7â10 days with non-specific flu-like symptoms in the first week followed by arthralgias or arthritis in up to 60% of patients in the second week.
Variable Torque Motors - American Made Efficiency. One of the largest down-sides to electric motors is their inherent efficiency range and, in hybrid systems, the drag they can create on the drive train.
SparatelyExcited motor: The rotor and stator are each connected from a different power. supply, this gives another degree of freedom for controlling the motor over the shunt. 3. Series motor: the stator and rotor windings are connected in series. Thus the torque is. proportional 2to I so it gives the highest torque per current ratio over all other dc motors. It is therefore used in starter motors of cars and elevator motors (p. 563 Chapman, 4e, 2005 McGrow Hill).