Graph (relationship of Efficiency and Torque)
In a DC series motor, torque is directly proportional to the current passing through it. When more current
flows, the motor generates greater torque. This relationship is crucial in understanding how to control and
optimize the motor's performance. Initially, as torque increases, the motor operates in a range where it can
efficiently convert electrical power into mechanical power. This is known as the motor's "sweet spot" or
peak efficiency point. At this point, the losses within the motor are minimal, resulting in high overall
efficiency.
In summary, while increasing torque in a DC motor initially leads to improved efficiency within its
optimal range, there's a point where losses escalate, leading to reduced efficiency. Striking the right
balance and employing smart control strategies are key to achieving the best performance from a DC
motor.