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[原创] On Semi NVG800A75L4DSC 250kW逆变器设计平台解决方案

关键词:汽车电子 电动汽车 牵引逆变器

时间:2020-01-06 11:07:36       来源:中电网

On Semi公司的NVG800A75L4DSC是双面散热(DSC)半桥功率模块,在紧凑的占位内堆叠和扩展,提供一个小占位的平台方案用于从80 kW到250 kW电动汽车应用.额定电压750 V,额定电流800 A,是市场其他器件容量的两倍,模块中没有任何焊线,使其额定寿命加倍.NVG800A75L4DSC符合AQG-324认证的模块,含嵌入式智能IGBT,对集成的过流和过温保护功能提供更快的响应时间,因而提供更强固的整体方案.器件能够在最高175℃的结温下连续工作.主要用在混合和纯电动汽车主牵引逆变器和大功率DC/DC转换器.本文介绍了NVG800A75L4DSC主要特性,内部框图,推荐栅极应用电路以及评估板NVG800A75L4DSC−EVK主要特性, 简化框图,工作条件图和主要装配元件图,片上电流检测电路图.

The NVG800A75L4DSC is part of a family of power modules withdual side cooling and compact footprints for Hybrid (HEV) andElectric Vehicle (EV) traction inverter application.

The module consists of two Field Stop 4 (FS4) 750V Narrow MesaIGBTs in a half−bridge configuration. The chipset utilizes the newnarrow mesa IGBT technology in providing high current density androbust short circuit protection with higher blocking voltage to deliveroutstanding performance in EV traction applications.

A dual side liquid cooling heatsink reference design along with acomplete inverter kit (NVG800A75L4DSC−EVK) is available toenable easier design in.

NVG800A75L4DSC主要特性:

• Dual−Side Cooling
• Integrated Chip Level Temperature and Current Sensor
• Tvj max = 175°C for Continuous Operation
• Ultra−low stray inductance
• Low VCESAT and Switching Losses
• Automotive Grade FS4 & Fast Diode Chip Technologies
• 4.2 kV Isolated DBC Substrate
• AEC Qualified and PPAP Capable
• This Device is Pb−Free and is RoHS Compliant

NVG800A75L4DSC应用:

• Hybrid and Electric Vehicle Traction Inverter
• High Power DC−DC Converter

图1. NVG800A75L4DSC外形图

图2. NVG800A75L4DSC内部框图

图3.并联VE-Trac双模块推荐栅极应用电路

评估板NVG800A75L4DSC−EVK

This document is intended to be a guide to explain theconnectivity and usage of the evaluation kit described in thetable below. The evaluation kit is designed to quickly perform benchmarking or product evaluation at specificoperating conditions in a lab environment. The productshould only be operated and handled by qualified personnel with sufficient electrical engineering training andexperience.

The VE−Trac Dual Evaluation Kit consists of threeVE−Trac Dual power modules (NVG800A75L4DSC)mounted on dual side cooling heatsink, with a 6−ch Gatedriver board, DC Link capacitor and external hall−effectcurrent sense feedback for motor control. The kit does notinclude a PWM controller. The user must user their on PWMcontroller to operate the system. The evaluation kit allowsthe customers to evaluate VE−Trac Dual power moduleperformances in their early stage of inverter development.

The kit can be used as a double pulse tester to measure keyswitching parameters or used as a 3−ph inverter for motorcontrol.

评估板NVG800A75L4DSC−EVK主要特性:

• Inverter evaluation Hardware kit for EV/HEV TractionInverter applications (up to 150 kW)
• VE−Trac Dual NVG800A75L4DSC with 800 A, 750 VField stop 4 IGBT/Diode chipset
• Automotive Isolated high current and high efficiencyIGBT gate driver with internal galvanic isolation,NCD57000
• Implementation of Faster and simpler OCP enabled byOn−Chip Current Sensing feature in the power modules
• Implementation of faster and closer to true Tvj OTP withintegrated to On−Chip Temperature Sensing feature in thepower modules
• Custom designed dual side cooler offers low pressuredrop with excellent thermal performance
• Custom Film DC Link capacitor rated up to 500 VDC,500uF.

图4.评估板NVG800A75L4DSC−EVK外形图

图5.评估板NVG800A75L4DSC−EVK简化框图
评估板NVG800A75L4DSC−EVK工作条件图:

评估板NVG800A75L4DSC−EVK外形图主要元件:
_ Full assembled evaluation kit hardware
_ USB Drive containing all the required documentation

图6.评估板NVG800A75L4DSC−EVK装配图

图7.评估板NVG800A75L4DSC−EVK主要装配元件图

图8.评估板NVG800A75L4DSC−EVK实现片上电流检测电路图
详情请见:
https://www.onsemi.cn/pub/Collateral/NVG800A75L4DSC-D.PDF
https://www.onsemi.cn/pub/Collateral/EVBUM2704-D.PDF
以及https://www.onsemi.cn/pub/Collateral/AND9988-D.PDF
NVG800A75L4DSC-D.PDF
EVBUM2704-D.PDF
AND9988-D.PDF

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