| 摘要 |
A cooling fan control apparatus is provided to perform a proper ventilation control according to driving of a magnetron by controlling an output of a cooling fan according to an output level of a secondary coil of a high voltage transformer. A high voltage transformer(HVT) outputs a voltage of a different output level according to a turns ratio of a primary coil and a secondary coil. A fan motor rotates a cooling fan. A first sub relay(SR1) is connected to a high output terminal(H1) of a fan motor coil(10) and a high output terminal(H2) of a primary coil of the high voltage transformer. A second sub relay(SR2) is connected to a low output terminal(L1) of the fan motor coil and a low output terminal(L2) of the primary coil of the high voltage transformer. A micro computer(30) controls an output level of the high voltage transformer and an output level of the fan motor by selectively controlling one of the first sub relay and the second sub relay according to a command. |
