Electronic device for modeling the temperature of a motor
AssigneeSchneider Electric SA
InventorsAlain Gousset, Philippe Guibert
Life of this patent
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Abstract
An electronic device for modeling the temperature of a motor by utilizing signals output from current sensors placed on motor power supply phases. Signals from the current sensors are sent to an interface that outputs a voltage which is an image of a summation a ratio of the motor currents sensed by each of the current sensors to a corresponding adjustment current for each of the phases. A calculation circuit utilizes the voltage as an input and outputs a charging current wave stream, the amplitude and the duration of the charging current being proportional to the summation the ratio. An RC type modeling circuit is provided to receive the charging current wave stream and to model the thermal state of the motor based on the charging current wave stream.
Claims8
An electronic device for modeling the thermal state of a motor by utilizing a plurality of signals output from a respective of a plurality of current sensors placed on a respective of a plurality of power supply phases of the motor, comprising:
- interface means for receiving the signals output from the current sensors and for outputting a voltage which is an image of a summation of a ratio of the motor currents sensed by each of the current sensors to a corresponding adjustment current for each of the phases;
- calculation means for receiving the voltage output from said interface means as an input and for outputting a charging current wave stream, an amplitude and duration of the charging current wave stream both being proportional to the summation of the ratio;
- and
- modeling circuit means for receiving the charging current wave stream output from said calculation means and for modeling the thermal state of the motor based on the charging current wave stream.
An electronic device for modeling the thermal state of a motor by utilizing a plurality of signals output from a respective of a plurality of current sensors placed on a respective of a plurality of power supply phases of the motor, comprising:
- an interface circuit configured to receive the signals output from the current sensors and to output a voltage which is a summation of an image of a ratio of the motor currents sensed by each of the current sensors to a corresponding adjustment current for each of the phases;
- a calculation circuit configured to receive the voltage output from said interface circuit as an input and for outputting a charging current wave stream, an amplitude and duration of the charging current wave stream both being proportional to the summation of the ratio;
- and
- a modeling circuit configured to receive the charging current wave stream output from said calculation circuit and to model the thermal state of the motor based on the charging current wave stream.
Dependencies are inferred from the claim text.