Domestic animal stable ventilation - has change pole motor which drives fan with applied motor voltage controlled by temp. sensor

摘要

The temperature dependent air flow rate regulator is used for domestic animal stables. The regulator uses electrically powered fans to give a wide range of operation. The fan is driven by a change pole motor with temperature sensor. The latter is connected to a switching circuit for changing the motor pole. Voltage applied to the motor is varied by the temperature sensor. The change pole motor is an asynchronous motor whose winding is divided into several sections.