ocr: - a PROJECT 1 NI - - - 1 - - - - motor speed controller * - how a motor speed controller works 2 3. Ift the fan is switched on and off more rapidly then the motor speed will be 5. higher+ a The time when the motor isonis called the mark and the time when it isoffis called the space. the speed is dependent on ther ratio of mark to space. tim e This provides a solution giving full torque at low speeds but is very difficult to obtain manually. -
