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[原创]TI TIDA-010210 6.6kW三相三级ANPC逆变器参考设计

TI公司的TIDA-010210 6.6kW三相三级ANPC逆变器/PFC上向功率级参考设计,提供实现三级三相碳化硅/氮化镓(SiC/GaN)基于ANPC逆变器功率的设计模板.采用超快功率器件使得开关频率高于100kHz成为可能,从而降低滤波器所用磁性元件尺寸和增加功率级功率密度.多级拓扑允许在高达1000V的更高DC总线电压上使用600V额定的功率器件.较低开关电压应力降低了开关损耗,导致峰值效率高达98.5%.设计是模块化的,使得用同样的滤波器级可配置和SiC或GaN功率器件一起工作.主要用在太阳能串型逆变器,太阳能集中式逆变器和能量存储电源转换器(PCS).本文介绍了参考设计TIDA-010210主要特性和指标,框图,以及ANPC三相逆变器架构图,电路图和材料清单.

This reference design provides a design templatefor implementing a three-level, three-phase, siliconcarbide/gallium nitride (SiC/GaN) based ANPCinverter power stage. The use of fast switching powerdevices makes it possible to switch at a higherfrequency of 100 kHz, reducing the size of magneticsfor the filter and increasing the power density ofthe power stage. The multilevel topology allows theuse of 600-V rated power devices at higher DCbus voltages of up to 1000 V. The lower switchingvoltage stress reduces switching losses, resulting ina peak efficiency of 98.5%. This design is modular in

construction, making it configurable to work with SiCor GaN power devices with the same filter stage.

This reference design is built in a modular construction to allow easy replacement of power switching devices toallow easy comparison between them. The following boards combine to form this three-phase inverter referencedesign:

• A mother board, comprising of the LCL filter, sensing electronics, bias power, switching relays and coolingfans.

• A TMDSCNCD280049C Control Card to support the DSP.

• Six power cards switching at 100kHz containing power switching devices, gate drivers and isolated biaspower supplies. These can be SiC or GaN based.

• Three power cards switching at 100/120Hz containing power switching devices, gate drivers and isolated biaspower supplies. These can be Si or SiC based.

Though the board can accept 12 V bias power from an external power supply, it has provision to add an auxiliarypower supply that can run from the high voltage DC bus.

TIDA-010210主要特性:

• Power stage for three phase inverters/PFCs usingSiC/GaN switch

• 650-V rated switches in 800-V system (due tothree levels)

• Novel on-board protection implemented using CLBof C2000

• Iso-dual channel driver supports high frequencyoperation (100KHz)

• Shunt based current sense (high accuracy andlinearity over temperature)

• Power module with up to 10-A current (on AC side)

• High power density due to high switchingfrequency (100kHz) and high efficiency (>98% atfull load)

• Bidirectional operation with <1ms directionchangeover

• Low component stress helps improve systemreliability

• Optimized control scheme needs only 6 PWMs vs.9 PWMs for standard implementation

• Reduced cost - four high frequency switches (vs.six) per arm