ON Semiconductor VE-Trac User Manual

EVBUM2704

VE-Tract Dual EZ Kit Quickstart Guide

This document is intended to be a guide to explain the connectivity and usage of the evaluation kit described in the table below. The evaluation kit is designed to quickly perform benchmarking or product evaluation at specific operating conditions in a lab environment. The product

should only be operated and handled by qualified personnel with sufficient electrical engineering training and experience.

Applies to the following parts.

Table 1.

NVG800A75L4DSC−EVK 750 V, 800 A based 3−ph

Evaluation kit

Figure 1. NVG800A75L4DSC−EVK

INTRODUCTION

The VE−Trac Dual Evaluation Kit consists of three VE−Trac Dual power modules (NVG800A75L4DSC) mounted on dual side cooling heatsink, with a 6−ch Gate driver board, DC Link capacitor and external hall−effect current sense feedback for motor control. The kit does not include a PWM controller. The user must user their on PWM controller to operate the system. The evaluation kit allows the customers to evaluate VE−Trac Dual power module performances in their early stage of inverter development. The kit can be used as a double pulse tester to measure key switching parameters or used as a 3−ph inverter for motor control.

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EVAL BOARD USER’S MANUAL

VE−Trac Dual evaluation kit features:

• Inverter evaluation Hardware kit for EV/HEV Traction

Inverter applications (up to 150 kW)

• VE−Trac Dual NVG800A75L4DSC with 800 A, 750 V

Field stop 4 IGBT/Diode chipset

• Automotive Isolated high current and high efficiency

IGBT gate driver with internal galvanic isolation, NCD57000

• Implementation of Faster and simpler OCP enabled by

On−Chip Current Sensing feature in the power modules

• Implementation of faster and closer to true Tvj OTP with

integrated to On−Chip Temperature Sensing feature in the power modules

• Custom designed dual side cooler offers low pressure

drop with excellent thermal performance

• Custom Film DC Link capacitor rated up to 500 VDC,

500 mF.

TECHNICAL DETAILS

ON Semiconductor’s latest generation of IGBTs and Diodes are incorporated into the VE−Trac Dual products. The 750 V products use the latest 4 IGBTs from ON Semiconductor.

Block Diagram

In this section, we describe the evaluation kit in detail, including block diagram, operating conditions, key components, On−chip current/temperature sensing and protection features.

Generation of FS4

July, 2020 − Rev. 1

1 Publication Order Number:

EVBUM2704/D

EVBUM2704

Vin

GNDC

Boost Based on NCV8870

20 V

Buck

Based on

NCV890100

3.3 V

LDO

1.8 V

Logic Block

CPLD

5M40ZE64C5N

NCD57000

Flyback NCP 1031

Optical isolator

GND

−9

LDOs

OUTPUTS

Master Fault OC

Temp Fault OC

Over Curr fault OC

Ready OC

HV_fault OC

INPUTS

6x PWM diff

FOD8071

Reset

Halt

ANALOG OUT

Input Voltage

T° IGBT

LEM

Push−Pull

Driver

−5

Sensing

circuit

Figure 2. Simplified Block Diagram

The simplified block diagram gives a quick overview of the evaluation kit. The dotted lines show the different isolated sections of the system.

exposed high voltage and high temperatures that when accidentally contacted can result in electrical shock or severe burns. Therefore, it should only be handled by professionals with sufficient electrical engineering training

Maximum Ratings

The VE−Trac Dual Evaluation kit is intended to be operated in a lab testing environment and should not be regarded as a protected system. Parts of the design have

Table 2. SUMMARY OF OPERATING CONDITIONS

Parameter Symbol Min Max Conditions

Gate Driver Board Control Power V

DC Link Voltage V

Peak Collector Phase Current (1 ms) I

Maximum IGBT/FWD Junction Temperature T

Wait time after short circuit SC 1 s −

PCB Temperature T

Switching frequency F

Coolant Temperature T

Driv

BUS

CPEAK

VJ_Max

PCB

and experience. Moreover, the operating conditions especially the thermal limits described below should be followed strictly.

9 V 15 V

0 V 500 V Limited by Capacitor

−1600 A 1600 A Limited by Tvj_Max

−40°C 175°C

− 85°C

− 12 kHz

−40°C 65°C

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EVBUM2704

Key Components

The evaluation kit is shipped in a hard plastic case with the following contents:

n Full assembled evaluation kit hardware

n USB Drive containing all the required documentation

Figure 3. Shipping Contents in Case

The assembled evaluation kit assembly itself consists of the following major components.

Figure 4. Major Components that Make Up the Evaluation Kit

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EVBUM2704

Table 3. SUPPLIERS FOR THE MAJOR COMPONENTS OF THE EVALUATION HARDWARE

Part Number Manufacturer Description

NVG800A75L4DSC with reference

heatsink stack

NCD57000 ON Semiconductor Automotive Isolated Gate Driver

Dual side cooler ON Semiconductor ON Semi design with outsourced manufacturing.

700A321 SBE

HAH3DR 900−S00−BB LEM Hall Current Transducer. ±900 A

On−chip Current Sensing and Temperature Sensing

One of the kay advantage of the VE−Trac Dual power modules is the integrated On−chip current sensing and On−chip temperature sensing. The Evaluation kit offers users the option of monitoring the junction temperature and

ON Semiconductor Automotive VE−Trac Dual power module with FS4 750 V 800 A

IGBT and Diode

DC Link Capacitor 500 V, 500 mF

current of all six IGBTs in real time. OCP/OTP protections is implemented using the on−chip sensors. Below schematics show how On−chip current sensing is implemented as well as test points for verification purpose.

Figure 5. Schematics of Implementing On−chip Current Sensing

Figure 6. Test Points for On−chip Current and Temperature Sense

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Test points for current/temp sense, of which all 6 switches are available

EVBUM2704

Protection Features

Over Current Protection (OCP) and Over Temperature Protection (OTP) are implemented by sensing the On−chip current sensor and On−chip temperature sensor respectively. Besides this, the traditional desaturation protection is also implemented to allow users to compare it with the On−chip current sense protection. The protection trigger levels are set as below:

• Over Current Protection (OCP) for all phases set to

1600 A

Table 4. FAULT INDICATION LED MATRIX

OCP_FAULT_

Phases

Phase_U_HS D12 D10 D28

Phase_U_LS D13 D11 D40

Phase_V_HS D16 D14 D61

Phase_V_LS D17 D15 D64

Phase_W_HS D20 D18 D34

Phase_W_LS D21 D19 D54

LED

• Over Temperature Protection (OTP) for all phases set to

150°C

• DC Link Over Voltage Fault Threshold set to 550 VDC

NOTE: All faults are the latching type and requires a

reset to clear the fault latch to start operating again. During a fault incident, a LED is lit to help the user to identify the cause of the fault. Below is Fault Indication LED Matrix for the VE−Trac Dual evaluation kit. Normal operation indication LEDs are off when fault occurs, refer to Figure 11 for locations of fault LEDs

DRVER_

OTP_FAULT_LED

FAULT_LED

PCBs AND CONNECTORS

There is a total of five (5) PCBs in the evaluation kit assembly.

1. Power Module interface boards (3)

2. Gate driver board (1)

3. Current sensor board (1)

Power Module Interface boards are not accessible to the user and is soldered to the signal pins of each of the three VE−Trac Dual modules. An interface cable with a signal

connector extends from the interface boards to connect to the gate driver board. The purpose this arrangement is to make it easy to remove the driver board for replacement or for trouble shooting purpose.

Gate driver board is the main PCB with several connectors on it. It interfaces with the user’s Motor Control Unit (MCU), the hall−effect current sensors, Power modules and aux. power input.

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