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US 4,831,294 AGranted
Air cooled electromechanical drive apparatus
AssigneeKone Corporation
InventorOlavi Jussila
Life of this patent
Estimating the term…
Abstract
An electromechanical drive has an ac motor provided with a brake, a frequency converter provided with a control unit and supplying the motor, and a transmission gearing connected to the output of the motor. To achieve efficient cooling, the drive is provided with a cooling tunnel housing the motor and the brake; the control unit and the power stage semiconductor switches of the frequency converter are located on the outer walls of this tunnel; and the transmission gear is located in or adjacent the tunnel.
Claims5
An electromechanical drive comprising:
- an a.c. motor;
- a brake associated with said a.c. motor;
- a frequency converter provided for supplying said motor;
- said frequency converter comprising power stage semiconductor switches;
- means for controlling said frequency converter;
- a transmission gearing connected to the output of said motor;
- a cooling tunnel housing said motor and said brake;
- said control means and said power stage semiconductor switches of said frequency converter being located on outer walls of said cooling tunnel;
- and
- said transmission gearing being located in or adjacent said cooling tunnel.
7 more elements
Dependencies are inferred from the claim text.