DC motor equivalent circuit

Probe current voltage pin 420*4450 head diameter 5.0 over current current and voltage pin

Single chip microcomputer STM32L151CCU6

GW MB10F 0.8A 1000V rectifier bridge

Mobile phone crystal 3.2*2.5mm 3225 26M (26.000MHZ) 7.5PF 10PPM 20PPM 30PPM

For the permanent magnet DC motor or the separately excited DC motor, the equivalent circuit is shown in the figure. The back electromotive force Ea can be regarded as a variable voltage source, which is proportional to the motor speed n. The electromagnetic torque T is also proportional to the armature current. The armature resistance R is usually small, and has a certain current limiting action when the motor is started and blocked. Armature inductance L. It has an effect on the dynamic performance. When the motor is driven by a switch, for example, when it is driven by pulse width modulation, the current ripple is smoothed.