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    • 6. 发明申请
    • Power Conversion Device and Temperature Rise Calculation Method Thereof
    • 电力转换装置及其升温计算方法
    • US20130119912A1
    • 2013-05-16
    • US13806822
    • 2011-06-23
    • Hideki AyanoKatsumi IshikawaKazutoshi OgawaTsutomu KominamiMami Kunihiro
    • Hideki AyanoKatsumi IshikawaKazutoshi OgawaTsutomu KominamiMami Kunihiro
    • H02P29/00
    • H02P29/0088H02M1/32H02M7/5387H02M2001/327H02P21/06H02P29/68
    • A temperature rise of a semiconductor switching element, which is part of a power conversion device such as an inverter, is estimated by an extremely simple method to assess the degradation and remaining lifetime of the semiconductor switching element.In a heat generation amount calculation unit 12 in a calculation processor 3, current command values Id* and Iq* and voltage command values vu*, vv* and vw* are used to calculate a chip loss. First, current values iu*, iv* and iw* of all output phases are estimated from the current command values. The ON/OFF loss of the chip is represented by a function of an estimated value for a current flowing in each output phase, and the loss can be derived by integration with a PWM carrier frequency f. In addition, with respect to a conduction loss, it is necessary to integrate a conduction time with the estimated current value and a saturation voltage, which is a function of the estimated current value. In this case, the conduction time is calculated from a relationship between a carrier amplitude and the voltage command value in each control cycle fsw of the switching element. In addition, an ambient temperature sensor is added to calculate an absolute temperature.
    • 作为逆变器等功率转换装置的一部分的半导体开关元件的温度上升通过非常简单的方法来估计半导体开关元件的劣化和剩余寿命来估计。 在计算处理器3中的发热量计算单元12中,使用电流指令值Id *和Iq *以及电压指令值vu *,vv *和vw *来计算芯片损耗。 首先,从当前命令值估计所有输出相位的当前值iu *,iv *和iw *。 芯片的ON / OFF损耗由在每个输出相中流动的电流的估计值的函数表示,并且可以通过与PWM载波频率f的积分来导出损耗。 此外,对于导通损耗,需要将导通时间与估计电流值和作为估计电流值的函数的饱和电压进行积分。 在这种情况下,根据开关元件的各控制周期fsw中的载波幅度与电压指令值之间的关系来计算导通时间。 另外,添加环境温度传感器来计算绝对温度。