Analysis and Comparison on Motor Core Losses with Si-IGBT and SiC-MOSFET Inverter Excitations.
Analysis and Comparison on Motor Core Losses with Si-IGBT and SiC-MOSFET Inverter Excitations.
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Si-IGBT 和 SiC-MOSFET 逆变励磁电机铁损分析与比较。
DOI：
10.1109/intmag.2018.8508416
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发表时间：
2018
期刊：
影响因子：
--
通讯作者：
T. Sasaya
中科院分区：
文献类型：
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作者：
G. Nguyen;S. Odawara;K. Fujisaki;F. Iwamoto;T. Yamada;T. Sasaya
近年来，与硅（Si）功率半导体相比，碳化硅（SiC）功率半导体已被评估并证明为电力电子转换器和电动汽车提供了优越的整体性能[1 - 4]。根据[2]，SiC-MOSFET开关器件被评估为DC-AC逆变器和DC-DC转换器提供比Si-IGBT开关器件更好的效率和功率密度。这些研究大多集中在逆变器和电力电子变流器的损耗评估上。然而，逆变器及其功率器件也需要在内部永磁同步电机（IPMSM）铁芯损耗中进行评估，因为有报道称逆变器对铁芯损耗特性[5]，[6]有影响。[5]的作者表明，采用低导通功率半导体的逆变器比采用高导通功率半导体的逆变器铁损小10-20%。在我们之前的工作[6]中，我们仔细考虑了Si-IGBT和SiC-MOSFET逆变励磁下电钢板的铁损耗特性。低导通电压的SiC-MOSFET逆变器比高导通电压的Si-IGBT逆变器铁损更小；这是磁性体的材料评价。因此，下一步，电机铁芯损耗应通过使用Si-IGBT和SiC-MOSFET功率器件的三相逆变器仔细评估。本文研究了Si-IGBT和SiC-MOSFET逆变励磁下IPMSM的铁芯损耗特性。开发了两个三相逆变器的模型来激励电动机，其中其参数参考了我们实验室的实验IPMSM。第一个逆变器使用Si-IGBT器件，第二个逆变器使用SiC-MOSFET器件。两个逆变器采用PWM方式控制，载波频率为1 kHz，直流链路电压固定；电机以750转/分的低转速在负载工况下运行。在计算分析中，对两种逆变器的电机铁芯损耗进行了时域和频域的比较和评估；通过对电机定子相电压波形的分析，验证了两种逆变器的有效性。此外，还分析了电机铁芯损耗的磁通密度和分布轮廓。
In recent years, the silicon carbide (SiC) power semiconductors haved been evaluated and proven to provide the superior overall performance for power-electronic converters and electric vehicles as compared to the silicon (Si) power semiconductors [1 – 4]. According to [2], the SiC-MOSFET switching device was assessed to offer the better efficiency and power density for a DC-AC inverter and DC-DC converter than the Si-IGBT switching device. Most of those studies focused on evaluation of losses in inverter and power-electronic converters. However, inverter and its power devices need to be also evaluated in the core loss of interior permanent magnet synchronous motor (IPMSM), because inverters are reported to have influence on the iron core loss characteristics [5], [6]. Authors in [5] showed that an inverter with low on-voltage power semiconductors has about 10-20% smaller iron loss than the one with high on-voltage power semiconductors. In our previous work [6], we carefully considered iron loss characteristics of electrical steel sheet with the Si-IGBT and SiC-MOSFET inverter excitations. The SiC-MOSFET inverter with low on-voltage has smaller iron loss than the Si-IGBT inverter with high on-voltage; this is a material evaluation of magnetic body. So as the next step, motor core loss should be carefully assesses by three-phase inverters using the Si-IGBT and SiC-MOSFET power devices. This paper investigates core loss characteristics of the IPMSM with the Si-IGBT and SiC-MOSFET inverter excitations. Models of two three-phase inverters are developed to excite the motor, where its parameters are referred from an experimental IPMSM in our laboratory. The first inverter uses the Si-IGBT devices, and the second inverter uses the SiC-MOSFET devices. The two inverters are controlled by PWM method with a low carrier frequency of 1 kHz and a fixed DC-link voltage; the motor is operated with a low rotational speed of 750 rpm and in load operational case. In computational analysis, motor core losses with the two inverters are compared and evaluated on both time and frequency domains; waveforms of stator phase voltage of the motor with the two inverters are also examined to demonstrate efficacy of the two inverters. In addition, the magnetic flux density and distribution contours of motor core losses are analyzed.