Air-cooled motor controller for controlling at least one electric motor and method for controlling a fan of a corresponding motor controller
AssigneeDanfoss Power Electronics A/S
InventorsAmol Ramesh Chopade, Marian Lungeanu, Henrik Rosendal Andersen
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Abstract
The present invention refers to an air-cooled motor controller for controlling electric motors, comprising a heat-sink and a variable fan for cooling passive and active components of the motor controller by means of an air stream generated by the fan. The invention is directed towards a fan control means and a coupled fan control method for controlling the speed of the fan of the motor controller in response to the losses in both passive and active devices inside the motor controller.
Claims20
An air-cooled motor controller for controlling at least one electric motor, said motor controller comprising a heat sink and a variable-speed fan for cooling passive and active components of the motor controller by means of an air stream generated by the fan, wherein
- the controller combines a first controller with a second controller for controlling the fan, wherein
- the first controller sets a base speed of the fan based on the characteristics of the active components attached to the heat sink, and wherein
- the second controller is fed by the power loss of at least one passive component of the motor controller for adding an additional speed contribution to said base speed of the fan.
Dependencies are inferred from the claim text.