Within the range of electric motors manufactured by VERNIS MOTORS, there are repulsion motors.The repulsion motor is a type of electric motor that is designed to provide a high level of torque or rotational force during startup, and to have the ability to easily reverse the direction of rotation. It is an alternating current (AC) motor that uses a series of contact brushes that can have a varying angle and contact level to change torque and rotation parameters.
The VERNIS MOTORS repulsion motor has an electrical winding for the stator and rotor assembly and does not have permanent magnets to generate an electromagnetic field. The electric brushes are placed on the rotor assembly through a commutator, and current passes through them to the rotor while it is in contact to start the motor. When the repulsion motor reaches high speed, the brushes are generally withdrawn and the motor acts like a typical induction motor. This gives the repulsion motor high torque at low speeds and standard motor performance at high speeds. A shorting mechanism is also incorporated into the motor to break the connection to the commutator so that it can function as an induction motor and also have the ability to reverse rotation.
These engines are used in typical rail industry and are still used for some applications such as needle shifts.