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US 2014/0372059 A1Published application
Method and System for Calculating Model Parameters for a Coil to be Modelled
AssigneeMindcet Bvba
InventorsMike Irena Georges Wens, Jef Thone
Life of this patent
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Abstract
Method for calculating model parameters for a coil (L), comprising of: incorporating the coil into a converter (1) with a switching element (2); connecting a resistive load (9); applying an input voltage (Uin); controlling the switching element in order to obtain a periodically varying voltage across the coil; measuring at least a first and second quantity representative of respectively the voltage (UL) across and the current (iL) through the coil; determining at least one voltage value and at least one current value on the basis of the measured first and second quantity; calculating a loss resistance and/or a loss power of the coil on the basis of the at least one voltage value and the at least one current value.
Claims22
A method for calculating model parameters for at least one coil to be modelled, the method comprising the following steps of:
- incorporating the at least one coil to be modelled into a DC to DC converter with at least a first switching element, which converter has input terminals and output terminals;
- connecting a resistive load between the output terminals of the DC to DC converter;
- applying an input voltage at the input terminals of the converter;
- controlling the first switching element in accordance with a frequency and duty cycle to obtain a voltage varying periodically in time across a coil of the at least one coil to be modelled, which voltage depends for at least a part of a period on the input voltage;
- measuring at least a first quantity representative of the voltage across the coil at successive points in time in at least said part of a period;
- measuring at least a second quantity representative of the current through the coil at successive points in time in at least said part of a period;
- determining at least one voltage value for the voltage across the coil on the basis of the measured first quantity;
- determining at least one current value for the current through the coil on the basis of the measured second quantity;
- calculating at least one of a loss resistance or a loss power of the coil on the basis of the at least one voltage value and the at least one current value;
- and
- repeating the above stated steps for at least one of a different input voltage, a different frequency, a different duty cycle, or a different resistive load.
8 more elements
(canceled)
A system for calculating model parameters for at least one coil to be modelled, the system comprising:
- a DC to DC converter with at least a first switching element and the at least one coil to be modelled incorporated therein, which converter has input terminals and output terminals;
- a resistive load with a resistor between the output terminals of the converter;
- a voltage source connected for the purpose of providing an input voltage at the input terminals of the converter;
- a controller configured to control the first switching element according to a set frequency and duty cycle in order to obtain a voltage varying periodically in time across the coil of the at least one coil to be modelled, such that voltage depends for at least a part of a period on the input voltage;
- a voltage measuring apparatus configured to measure at least a first quantity representative of the voltage across the coil at successive points in time in at least said part of a period;
- a current measuring apparatus configured to measure at least a second quantity representative of the current through the coil at successive points in time in at least said part of a period;
- and
- a computer configured to (i) determine (a) at least one voltage value for the voltage across the coil on the basis of the measured first quantity, (b) at least one current value for the current through the coil on the basis of the measured second quantity and (ii) calculate a loss resistance and/or a loss power of the coil on the basis of the at least one voltage value and the at least one current value.
5 more elements
(canceled)
A method for calculating model parameters for at least one coil to be modelled, the method comprising the following steps of:
- incorporating the at least one coil to be modelled into a DC to DC converter with at least a first switching element;
- which converter has input terminals and output terminals;
- connecting a resistive load between the output terminals of the DC to DC converter;
- applying an input voltage at the input terminals of the converter;
- controlling the first switching element in accordance with a frequency and duty cycle to obtain a voltage varying periodically in time across a coil of the at least one coil to be modelled, which voltage depends for at least a part of a period on the input voltage;
- measuring at least a first quantity representative of the voltage across the coil at successive points in time in at least said part of a period;
- measuring at least a second quantity representative of the current through the coil at successive points in time in at least said part of a period;
- determining at least one voltage value for the voltage across the coil on the basis of the measured first quantity;
- determining at least one current value for the current through the coil on the basis of the measured second quantity;
- calculating a loss resistance and/or a loss power of the coil on the basis of the at least one voltage value and the at least one current value;
- repeating the above stated steps for a different input voltage and/or for a different frequency and/or for a different duty cycle and/or for a different resistive load;
- further comprising:
- determining on the basis of the measured second quantity at least one first and second current value for the current through the coil at respectively a first and second point in time of the successive points in time in said part of the period;
- calculating an inductance of the coil on the basis of the voltage value, the loss resistance or the loss power and at least the first and second current values;
- wherein the successive points in time cover a substantially complete period.
12 more elements
Dependencies are inferred from the claim text.