PURPOSE: To eliminate power consumption useless for cooling, by setting the optimum relation between the thermal equivalent load and the cooling air quantity of a motor previously, and by measuring the thermal equivalent load of the motor to determine the cooling air quantity.
CONSTITUTION: On a motor 5 provided with a cooling fan 7, the optimum relation between the thermal equivalent load of the motor 5 and the cooling air quantity from the cooling fan 7 is previously set, and the memory is reserved by an arithmetic controller 2. When the motor 5 is driven, then data on the load of the motor 5 are accepted from a system computer 1, and the thermal equivalent load is performed arithmetic, and according to the value, the cooling air quantity is determined and the cooling fan 7 is controlled. Then, by determining the cooling air quantity in addition to the open air temperature, the water temperature of a unit cooler, or the winding temperature of the motor 5, more optimum air quantity can be controlled.
ISHIGAMI NAOTAKE
TAKAHASHI KEIICHI
KASHIWAKURA YOSHIMITSU
KIMURA KOZO
UONAMI YOSHIYUKI
| JP57189296B | ||||
| JPS58212342A | 1983-12-10 | |||
| JPS5983555A | 1984-05-15 |