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技術探索

馬逹控制模組功率元件故障診斷與可靠度預警

中文摘要

功率電子元件絕緣閘雙極電晶體(IGBT)為馬達控制系統裡的驅動元件,具有驅動電流小與導通電阻低等優勢,但是功率元件的失效卻會降低馬達運轉效能,並有可能造成系統災難性的危害。本論文主要設計了具備安全及診斷功能之馬達控制器模組,整合ARM系統單晶片處理器、馬達控制演算法、錯誤偵測診斷演算法等軟硬體相關技術,並針對系統裡最危險且容易失效的功率元件,藉由偵測三相電流的平均電流,不需要額外的感應器電路以降低系統成本,在失效初期即能診斷及紀錄失效發生的原因,並透過低功耗藍芽(BLE)模組傳送錯誤代碼,使用者可以透過智慧型手持式裝置讀取錯誤訊息,以了解系統發生的異常現象,達到預警的功能,使得安全性與可靠度大幅提升。

Abstract

Power electronic device IGBT is the driving element in motor control system, it has the advantage of smaller driving current and lower on-state resistance. But the fault of power stage not only decrease the performance of motor system, and will cause the catastrophic failure. This paper presents a research on motor control unit power stage diagnostic and reliability monitoring, this module integrates hardware and software technology, including ARM System-on-Chip, motor control algorithm and fault detection algorithm. Especially, by using the average of three phase current, it can detect and diagnose the fault of power electronic device in the early stage and doesn’t need the extra sensor effort. By using the BLE module to transmit error codes, users can use mobile device to understand the failure behavior, increasing the safety and reliability of the motor control system.

關鍵詞(Key Words)

絕緣閘雙極電晶體 (Insulated Gate Bipolar Transistor;IGBT)
馬達控制模組 (Motor Control Unit)
功率元件診斷 (Power Stage Diagnostic)
低功耗藍芽 (Bluetooth Low Energy;BLE)

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