| 摘要 |
A vehicle air conditioning fan is controlled by three sets (R1n, R2n,R3n) of resistors which act as a potential divider for motor supply terminals (B0,B1,B2,B3).- The temperature of the ceramic resistors is equalised by heat exchangers (EC12,EC23) and an additional series resistor whose resistance rises sharply above a threshold temperature is added to protect the control unit against overheating |
