Method and device for measuring the temperature of a brushless d-c motor
AssigneeHeidelberger Druckmaschinen AG
InventorsHelmut Meyer, Jurgen Seeberger
Life of this patent
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Abstract
A method for determining the temperature of a brushless d-c motor with a permanent-magnet rotor and an at least three-phase winding with electronic commutation including determining the curve of an EMF induced in a winding during one phase wherein the winding is in currentless condition, and evaluating the temperature therefrom.
Claims8
Method for determining the temperature of a brushless d-c motor with a permanent-magnet rotor and an at least three-phase winding with electronic commutation, which comprises determining the curve of an EMF induced in a winding during one phase wherein the winding is in currentless condition, and evaluating the temperature therefrom.
Device for determining the temperature of a brushless d-c motor with a permanent-magnet rotor and an at least three-phase winding, with electronic commutation, comprising an integrator having an input for receiving an EMF induced in the winding, a control device connected to said integrator for starting integration at an instant of zero passage of the EMF and for stopping the integration at the beginning of a subsequent commutation signal, and a circuit post-connected to said integrator for storing the integral of the EMF within a measuring time period in the form of a temperature-proportional signal.
Dependencies are inferred from the claim text.