INTELLIGENT DIAGNOSIS SYSTEM FOR POWER MODULE AND METHOD THEREOF
First Claim
1. An intelligent diagnosis system for a power module, comprising:
- a power module provided with a temperature sensing element configured for measuring a starting minimum temperature and a current temperature of the power module and determining a temperature difference between the starting minimum temperature and the current temperature;
a hardware checking module provided on one side of the power module, and including;
a current sensing element configured for sensing a current in the power module;
a voltage sensing element configured for measuring an output voltage and an input voltage of the power module; and
a magnetic coupling closed loop detection element configured for performing a self-test on a current status of the hardware to obtain a hardware loop status; and
a diagnostic module connected with the power module and the hardware checking module, and configured for calculating a number of cycles that have been operated based on the current temperature and the current sensed by the current sensing element and calculating a measured impedance based on the output voltage, the input voltage and the current, so as to calculate an instantaneous power based on the measured impedance, the output voltage and the current,wherein the diagnostic module calculates a risk index based on the number of cycles operated, the temperature difference, the measured impedance, the instantaneous power and the hardware loop status.
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Abstract
An intelligent diagnosis system for a power module. The system includes a power module, a hardware checking module and a diagnostic module. The power module has a temperature sensing element for obtaining a temperature difference between a starting minimum temperature and a current temperature. The hardware checking module has a current sensing element, a voltage sensing element and a magnetic coupling closed loop detection element for obtaining the current, the output voltage and the input voltage of the power module, and the hardware loop status, respectively. The diagnostic module calculates the number of cycles that have been operated, a measured impedance and an instantaneous power based on those measurement results, and calculating a risk index based on the number of cycles that have been operated, the temperature difference, the measured impedance, the instantaneous power and the hardware loop status, thereby determining the accumulation of the abnormality index record.
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Citations
16 Claims
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1. An intelligent diagnosis system for a power module, comprising:
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a power module provided with a temperature sensing element configured for measuring a starting minimum temperature and a current temperature of the power module and determining a temperature difference between the starting minimum temperature and the current temperature; a hardware checking module provided on one side of the power module, and including; a current sensing element configured for sensing a current in the power module; a voltage sensing element configured for measuring an output voltage and an input voltage of the power module; and a magnetic coupling closed loop detection element configured for performing a self-test on a current status of the hardware to obtain a hardware loop status; and a diagnostic module connected with the power module and the hardware checking module, and configured for calculating a number of cycles that have been operated based on the current temperature and the current sensed by the current sensing element and calculating a measured impedance based on the output voltage, the input voltage and the current, so as to calculate an instantaneous power based on the measured impedance, the output voltage and the current, wherein the diagnostic module calculates a risk index based on the number of cycles operated, the temperature difference, the measured impedance, the instantaneous power and the hardware loop status. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An intelligent diagnosis method for a power module, comprising:
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measuring a temperature, a current, an input voltage and an output voltage of a power module; performing a self-test on a current status of hardware; calculating a number of cycles that have been operated by the power module based on the temperature and the current; calculating a measured impedance based on the output voltage, the input voltage and the current; calculating an instantaneous power based on the measured impedance, the output voltage and the current; and calculating a risk index based on the number of cycles operated, the temperature, the measured impedance, the instantaneous power and the hardware loop status. - View Dependent Claims (11, 12, 13, 14)
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15. A current sensing element provided on a lead of a power module in a surface mounted manner, wherein when a current is flowing through the lead and creating a magnetic field around the lead, the current sensing element senses the magnetic field and calculates a value of the current flowing through the lead.
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16. A magnetic coupling closed loop detection element provided at each of a plurality of insulated gate bipolar transistors in a three-phase bridge driver in a power module for detecting a current hardware loop status of the respective insulated gate bipolar transistors.
Specification