🔍 Key Concepts

• Characteristics of a compound-wound DC motor (combination of series and shunt windings) • How series-wound vs shunt-wound DC motors behave at starting and under varying load • Relationship between starting torque and current in different DC motor types

💭 Think About

• Think about what the shunt field contributes to motor speed behavior as the load changes. Does it tend to keep speed more constant or allow it to vary widely? • Think about what the series field contributes at the moment of starting, when motor speed is zero and current is highest. Does this increase or decrease starting torque? • Compare the starting torque of a compound-wound DC motor to a purely shunt-wound DC motor: which one is typically used when high starting torque is needed, such as in propulsion or hoisting?

✅ Before You Answer

• Be clear on how series-wound motors behave: very high starting torque, but large speed variation with load • Be clear on how shunt-wound motors behave: more constant speed, but lower starting torque than series • Confirm whether a compound-wound motor is designed to combine high starting torque, more constant speed, or both.