圈上话衣大峰 OUTLINE Actuators introduction DC Motor:Principles of operation DC Motor:Torque-speed curves DC Motor:Performance parameters 13 圈上大学 DC Motors:Principles of Operation .A wire carrying current experiences a force in a magnetic field. F= iU×B) Magnetic Flux Density(磁通量) (Tesla) Induced force Current Length of wire in the (amp) direction of i(m) I×B I×B=|Bsin9 B 1413 OUTLINE  Actuators introduction  DC Motor: Principles of operation  DC Motor: Torque-speed curves  DC Motor: Performance parameters 14 DC Motors: Principles of Operation • A wire carrying current experiences a force in a magnetic field. Magnetic Flux Density (磁通量) (Tesla) F  i(l B) Induced force Current (amp) Length of wire in the direction of i (m) I B I B  IB  I B sin