直流电机 | DC Motor

理想直流电机 | Ideal DC Motor

线圈产生电压公式：

• : armature generated voltage
• : armature constant. Depend on the number of turns and the method of interconnecting the armature coils.
• : total flux of the field system
• : rotational speed

Angular velocity (rad/s) & revolutions per second:

Revolutions per minute (rpm):

产生扭矩公式：

• T_d: developed torque (Nm)
• i_a: armature current (A)

Voltage on armature:

当扭矩负载较低时，电流 i_a 可忽略不计，此时电机转速：

能量效率和损失 | Efficiency: energy conversion and power loss

• : armature electrical input power
• : power lost in resistance
• : developed gross mechanical power

• : developed torque
• : shaft torque (output)
• : mechanical loss torque

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