Hybrid and EV – Drivetrain

1212 Abbott Road,Buffalo NY 14218

18 July, 2023

Description

In hybrid and electric vehicles, the Motor–Generator converts electrical power to mechanical power (and vice/versa). In essence, the motor uses electricity whereas the generator produces electricity. Through a process known as regenerative braking, the generator transfers otherwise wasted energy created by the rotating wheel while braking back to the battery pack. The motor then uses power from this highcapacity battery pack to drive the vehicle’s wheels. Throughout this course, participants will be introduced to the operation of the Motor-Generator, Inverter/Powertrain and Resolvers. While some of the traditional methods are still valid, Technicians will learn essential new skills and tools needed to service Hybrid and Electric vehicles. Meg-ohmmeter and milli-ohmmeters are two of the tools used when diagnosing faults within the motor generator windings and the high-voltage cables that supply the voltage for the motor generators. Diagnostic procedures will be investigated using Scan Tools, Milli-ohmmeters, Mega-Ohmmeter and DVOMs to detect and resolve fault issues. Recommended for A and B level technicians. Inverter/Powertrain • Component Construction & Operation • Transmission Operation and Fluid Issues • IGBT Transistor • Inverter Cooling • Scan Tool PID Interpretation & Diagnostics • Diagnosis of a Faulty Inverter Motor-Generator • Component Construction & Operation, Motor-Generator, cables • Motor-Generator Cooling • Scan Tool PID Interpretation & Diagnostics • Testing Motor Stator Milli-ohmmeter • Testing Motor Stator using Resistance and Voltage • Testing HV Cables, Insulation Testing using the DVOM tool • Diagnosis of a Faulty Motor-Generator Resolvers • Component Construction & Operation • Scan Tool PID Interpretation & Diagnostics • Scope Resolver 3 signals • Resolver Removal, Installation and Setup • Diagnosis of a Faulty Resolver Sensor Code o How do you test a MG unit for faults? o What is a resolver, and how do I test it? o What tools will I need to diagnose HV drivetrain issues?