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发明公开
CN102484441A 工程机械 无效 - 撤回

工程机械
摘要：
本发明提供一种工程机械。工程机械由以下部件构成：原动机(22)；通过原动机(22)而被驱动的液压泵(41)；通过来自液压泵(41)的压力油而被驱动的液压马达(27)；电动马达(25)；在与电动马达(25)之间进行电力的供给及接受的蓄电装置(24)；进行电动马达(25)的驱动控制的电动马达控制器(60)；将电动马达(25)和液压马达(27)的动力传递至旋转体(2)的减速机构(26)，其中，电动马达控制器(60)具有：感应电压波形检测机构，其检测电动马达(25)的感应电压波形；磁极位置算出机构，在仅通过液压马达(27)的转矩而驱动旋转体(2)的状态下，该磁极位置算出机构取入感应电压波形，根据得到的感应电压波形不经由旋转位置传感器而算出电动马达(25)的转子的磁极位置。
摘要（英）：

Disclosed is a construction machine comprised of a prime mover (22), a hydraulic pump (41) driven by the prime mover (22), a hydraulic motor (27) driven by pressurized oil from the hydraulic pump (41), an electric motor (25), an electric-power storage apparatus (24) that gives and receives electric power to/from the electric motor (25), an electric-motor controller (60) for conducting drive control of the electric motor (25), and a deceleration mechanism (26) for transmitting motive power of the electric motor (25) and the hydraulic motor (27) to a swiveling body. The electric-motor controller (60) is provided with an induced-voltage waveform detecting means for detecting the induced voltage waveform of the electric motor (25),and a magnetic-pole position calculating means for obtaining the induced voltage waveform in a state of having the swiveling body (2) driven just by the torque of the hydraulic motor (27), and calculating the magnetic-pole position of a rotor of the electric motor (25) from the obtained induced voltage waveform, without using a rotation position sensor.

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