High torque DC motors have their ______ wired in ______ with input current.

High torque DC motors have their ______ wired in ______ with input current.

• A. armature in series with the input current
• B. field in parallel with the input current
• C. field in series with the input current
• D. armature in parallel with the input current

Answer: (C)

High torque DC motors use a series-wound configuration where the field winding is wired in series with the armature and input current. This means the same current flows through both windings, so the field flux rises as current increases. Since motor torque is proportional to the field flux multiplied by the armature current, and the flux itself grows with current in a series setup, the starting torque is very large (roughly proportional to the square of the current). That’s why this arrangement is favored for high starting torque needs. A trade-off is that speed can vary widely with load and can run away at no-load due to the close coupling of current, flux, and speed.

High torque DC motors use a series-wound configuration where the field winding is wired in series with the armature and input current. This means the same current flows through both windings, so the field flux rises as current increases. Since motor torque is proportional to the field flux multiplied by the armature current, and the flux itself grows with current in a series setup, the starting torque is very large (roughly proportional to the square of the current). That’s why this arrangement is favored for high starting torque needs. A trade-off is that speed can vary widely with load and can run away at no-load due to the close coupling of current, flux, and speed.