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US 9,255,946 B2Granted
Electronic component, in particular current sensor
AssigneeIsabellenhuette Heusler GmbH & Co. KG
InventorUllrich Hetzler
Life of this patent
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Abstract
The invention relates to an electronic component (1), in particular a current sensor, having a resistance element (5) made of a resistance material, a first connection part (3) made of a conductor material for introducing an electrical current into the resistance element (5), and a second connection part (4) made of a conductor material for discharging the electrical current from the resistance element (5). According to the invention, the component (1) has a temperature-measuring device (8) for measuring a temperature difference between the resistance element (5), on the one hand, and at least one of the two connection parts (3, 4), on the other hand, in order to derive the current from the temperature difference.
Claims18
An electronic component, which is a current sensor, comprising:
- a) a resistance element comprising a resistance material;
- b) a first connection part comprising a conductor material for leading an electrical current into the resistance element;
- c) a second connection part comprising a conductor material for leading the electrical current out of the resistance element, wherein the conductor material of the first and second connection parts has a smaller specific electric resistance than the resistance material of the resistor element;
- d) a measurement value recording system, which is arranged to measure the electrical current flowing through the electronic component, wherein the measurement value recording system is constructionally integrated into the electronic component, and wherein the measurement value recording system is arranged to measure the electrical current flowing through the electronic component according to a number of different physical measuring principles, including:
- i) on the one hand by a first measuring principle which is a four wire measurement, wherein the electrical current to be measured is passed over two contacts through the resistance element while the electrical voltage is measured via two further contacts, which drops over the resistance element, and
- ii) on the other hand through a second measuring principle different from the first measuring principle, wherein the second measuring principle comprises a measurement of at least a temperature difference between the resistance element on the one hand and one of the first and second connection parts on the other;
- e) a temperature measuring device arranged for measurement of the temperature difference between the resistance element on the one hand and at least one of the first and second connection parts on the other hand, wherein:
- i) the temperature measuring device comprises a thermopile with multiple thermoelements, which are electrically switched one behind another,
- ii) hot contact points of the thermoelements are each thermally in contact with the resistance element, and
- iii) cold contact points of the thermoelements are alternately thermally in contact with the first connection part and the second connection part.
7 more elements
An electronic component, which is a current sensor, comprising:
- a) a resistance element comprising a resistance material;
- b) a first connection part comprising a conductor material for leading an electrical current into the resistance element;
- c) a second connection part comprising a conductor material for leading the electrical current out of the resistance element, wherein the conductor material of the first and second connection parts has a smaller specific electric resistance than the resistance material of the resistor element;
- d) a measurement value recording system, which is arranged to measure the electrical current flowing through the electronic component, wherein the measurement value recording system is constructionally integrated into the electronic component, and wherein the measurement value recording system is arranged to measure the electrical current flowing through the electronic component according to a number of different physical measuring principles, including:
- i) on the one hand by a first measuring principle which is a four wire measurement, wherein the electrical current to be measured is passed over two contacts through the resistance element while the electrical voltage is measured via two further contacts, which drops over the resistance element, and
- ii) on the other hand through a second measuring principle different from the first measuring principle, wherein the second measuring principle comprises a measurement of at least a temperature difference between the resistance element on the one hand and one of the first and second connection parts on the other;
- e) a temperature measuring device arranged for measurement of the temperature difference between the resistance element on the one hand and at least one of the first and second connection parts on the other hand;
- and
- f) a controllable switching element, wherein the switching element is connected with the temperature measuring device and is switched depending on the measured temperature difference.
6 more elements
An electronic component, which is a current sensor, comprising:
- a) a resistance element comprising a resistance material;
- b) a first connection part comprising a conductor material for leading an electrical current into the resistance element;
- c) a second connection part comprising a conductor material for leading the electrical current out of the resistance element, wherein the conductor material of the first and second connection parts has a smaller specific electric resistance than the resistance material of the resistor element;
- d) a measurement value recording system, which is arranged to measure the electrical current flowing through the electronic component, wherein the measurement value recording system is constructionally integrated into the electronic component, and wherein the measurement value recording system is arranged to measure the electrical current flowing through the electronic component according to a number of different physical measuring principles, including:
- i) on the one hand by a first measuring principle which is a four wire measurement, wherein the electrical current to be measured is passed over two contacts through the resistance element while the electrical voltage is measured via two further contacts, which drops over the resistance element, and
- ii) on the other hand through a second measuring principle different from the first measuring principle;
- and
- e) a voltage measurement unit, which measures the electrical voltage which drops over the resistance element, wherein:
- i) the voltage measurement unit is constructionally integrated into the electronic component;
- ii) the voltage measurement unit has a printed circuit board, which is fastened to the connection parts and/or to the resistance element;
- iii) the voltage measurement unit has two voltage tapping points, which are connected electrically with both connection parts in order to measure the voltage, which drops over the resistance element;
- iv) the voltage measurement unit is arranged on the one side and a temperature measuring device on the other side on opposing sides of the electronic component, wherein the temperature measuring device is arranged for measurement of a temperature difference between the resistance element on the one hand and at least one of the first and second connection parts on the other hand;
- and
- v) the voltage measurement unit reacts according to a certain second time constant to a temporal change of the electrical current flowing through the electronic component, wherein the second time constant is smaller than the first time constant of the temperature measuring device.
11 more elements
Dependencies are inferred from the claim text.