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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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TLE4964-2M датащи(PDF) 12 Page - Infineon Technologies AG |
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TLE4964-2M датащи(HTML) 12 Page - Infineon Technologies AG |
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12 / 91 page  12 Magnetic torque sensing assembly Application trend: fault tolerant Conventional EPS systems, which use two linear Hall sensors for ASIL D compliance, have to shut-down in the event of a loss of one sensor signal. Therefore, the trend in EPS systems is to increase availability by implementing additional sensor signals or plausibility mechanisms. To support this trend towards high-availability EPS functionality, Infineon recommends the usage of two TLE4998xD dual-sensors or two TLE4999x, each of them with two highly accurate redundant Hall measurement channels (main and sub) integrated on one single chip. In case of one TLE4998xD or TLE4999x signal loss, the remaining dual-sensor (TLE4998xD) or the single die two channels (TLE4999x) in the system provides continued operation of the EPS, avoiding an immediate system shut- down. Input sha Output sha Torsion bar Multipole magnetic ring Stator Sensor (e.g. TLE4999I3) Flux concentrator Stator + Limp-aside, degraded operation for very limited time Shut-down (= sudden loss!) ECU Shut-down Failure reaction ECU Soware, plausibility Limp-aside Application trend: fault-tolerant EPS New OEM safety goal: avoid sudden loss of steering support, up to ASIL-D Failure reaction Continued operation Dual sensor ECU Fault-tolerant Failure reaction Dual sensor Magnetic position sensors for the ultimate in energy efficiency and functional safety in Electric Power Steering (EPS) Sensors in Electric Power Steering (EPS) www.infineon.com/eps |
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