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Loss Analysis of Electric Motors in Hybrid Excavator

机译：混合挖掘机电动机的损耗分析

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摘要

Kobelco Construction Machinery Co., Ltd. has launched a new 20 tonne hybrid excavator, equipped with two types of newly developed electric motors, namely, a permanent magnet type, flat, high-torque generator motor, and a compact high-output slewing motor. In an electric motor, iron loss and copper loss occur, and these losses increase as the internal temperature rises. Therefore, the challenge in making compact electric motors with high torque and high output is to release the heat generated inside the motors to the outside and to prevent their internal temperature from rising. A technique has been established for the coupled analysis of an electrical/magnetic circuit model and a heat transfer circuit model in an electric motor that enables an optimal design of the heat transfer path inside the motor, as well as making it possible to efficiently find an appropriate electromagnetic circuit for it. This has resulted in the development of electric motors with high torque density.
机译：科博科建筑机械有限公司已推出新型20吨混合动力挖掘机，配备两种新开发的电动机，即永磁型，平板，高扭矩发生电动机，以及紧凑的高输出回转电机 。 在电动机，发生铁损和铜损，随着内部温度升高，这些损失增加。 因此，制造具有高扭矩和高输出的紧凑型电动机的挑战是将电动机内部产生的热量释放到外部，并防止其内部温度升高。 已经建立了一种技术，用于电动机中的电气/磁路模型和传热电路模型的耦合分析，其能够实现电动机内的传热路径的最佳设计，并使其有效地找到一个 适当的电磁回路。 这导致了具有高扭矩密度的电动机的开发。

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  • 来源
    《Kobelco technology review》 |2019年第37期|15-20|共6页
  • 作者

    Akira TSUTSUI; Ryo FUJISAWA; Kazuhide SEKIYAMA; Yoichiro YAMAZAKI; Seiji SAEKI; Kazushige KOIWAI;

  • 作者单位

    Applied Physics Research Laboratory Technical Development Group;

    Mechanical Engineering Research Laboratory Technical Development Group;

    Mechanical Engineering Research Laboratory Technical Development Group;

    Advanced Technology Department Design & Development Engineering Division Global Engineering Center (GEC) KOBELCO CONSTRUCTION MACHINERY CO. LTD;

    Advanced Technology Department Design & Development Engineering Division Global Engineering Center (GEC) KOBELCO CONSTRUCTION MACHINERY CO. LTD;

    Corporate Planning & Administration Department KOBELCO CONSTRUCTION MACHINERY CO. LTD;

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