| 摘要 |
<p>PURPOSE:To reduce the input noise as well as to contrive to miniaturize the subject controlling circuit by a method wherein the power source for electrically driven fan controlling circuit is provided from a supply terminal different from the route where power is supplied to a chopper control circuit from a battery. CONSTITUTION:The connector terminal B of a battery 10, to be connected to the chopper controlling circuit 11 through the intermediary of a chopper input terminal C, is connected to terminals A1 and A2, and these terminals A1 and A2 are connected to a motor 1 to be used for cooling a travelling motor 13 through the intermediary of a filter circuit 3 and a transistor inverter 2. Through these procedures, the noise which will be inputted to the electrically driven fan controlling circuit 2 from an input power source can be reduced and the filter circuit 3 can also be miniaturized.</p> |
