| 摘要 |
In a circuit arrangement for supplying fan motors, especially in motor vehicles, the rotor of the fan motor is connected via a bias resistor and via the switching junction of a transistor to the terminals of the power source. A voltage parameter which is produced in the bias resistor and a voltage parameter which corresponds to the rotor speed and is derived from the rotor characteristic value are added and their sum is compared with an adjustable voltage parameter. The difference influences the drive parameter for the transistor indirectly or directly. <IMAGE> |
