Control means and method of controlling a current through a coil
AssigneeKoninklijke Philips Electronics N.V.
InventorsRudolf Johan Maria Vullers, Willem Johannes Antonia Geven
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Abstract
Method of controlling a current through a coil (L) for the generation of a magnetic field (H) in which: a parameter is determined which is a measure for the value of the resistance (RL) of the coil (L), the current (IL) through the coil (L) is controlled by data (DS) delivered by a data control circuit (DSS), and a stop data signal (SPD) is delivered to the data control circuit (DSS) for (at least) temporarily stopping the control of the current (IL) when the parameter exceeds a certain limit.
Claims9
An electronic circuit comprising control means (CMNS) for controlling a coil current (IL) through a coil (L) for the generation of a magnetic field (H), a data control circuit (DSS) coupled to the control means (CMNS) for supplying data (DS) to the control means (CMNS), wherein the control means (CMNS) comprise detection means (DMNS) for determining a temperature parameter which is a measure for the resistance value (RL) of the coil (L) and for supplying a temperature stop signal (TSTP) for at least temporarily stopping the supply of data (DS) to the control means (CMNS) when said temperature parameter has exceeded a given value.
A method of controlling a coil current through a coil, wherein a temperature parameter is determined which is a measure for the resistance value of the coil, wherein the coil current is controlled by means of data which are supplied by a data control circuit, and wherein a temperature stop data signal is supplied to the data control circuit for at least temporarily stopping the control of the coil current when the temperature parameter exceeds a certain value.
Dependencies are inferred from the claim text.