To increase the starting torque, the leading edge of the shaded-pole motor may have a wider air-gap than the pole. It has been found that if a part of the pole face has a wider gap than the remainder of the pole, the motor develops some starting torque without the auxiliary winding. Such a motor is called a reluctance start motor. Adding the reluctance feature to a shaded-pole motor increases its starting torque. This feature is commonly employed in the design of a shaded-pole motor