Belt starter generator 48 V – inverter ISG
Low integration costs and development efforts
For a 48 V mild hybrid electrical system, the P0 powertrain configuration with the belt-driven integrated starter generator (BISG) offers cost-effective integration and minimal development efforts. Infineon provides a complete system solution, including microcontrollers, sensors, power drivers, and high-power MOSFETs, to control the BISG. Key components meet stringent safety standards with ISO 26262 ASIL-D compliance.
For more details on HV main inverter, you can visit the dedicated application page (H)EV main inverter - hybrid / electric vehicle.
Belt-driven integrated starter generator (BISG) 48 V
The P0 powertrain configuration with the belt-driven integrated starter generator (BISG) offers the lowest integration cost and development effort for a 48 V mild hybrid electrical system. With a focus on cost effectiveness and development efficiency, the BISG stands out as the most economical option for integrating a 48 V mild hybrid system. The electrical machine operates up to 10 kW of maximum peak power with low-power density in a three-phase or six-phase configuration. However, in the belt starter generator, the electrical machine torque is limited for boost by the belt connection, and the engine, and transmission friction losses reduce the recuperation efficiency.
- Cost-effective integration
- Minimal development efforts
- Complete system solution
- Compliance with safety standards
Infineon's BISG solution: Lowest integration costs and straightforward design implementation
Infineon offers a complete and comprehensive system solution, including supply ICs, microcontrollers, sensors, smart power drivers, high-power MOSFETs, and transceivers. The block diagram above shows the basic layout of the semiconductors used to control a BISG with an exciter winding (separate excitation of the synchronous machine). Here, the microcontroller enables both field-oriented controls of the electric motor and control of the exciter winding in alternator operation. According to safety requirements, the key components (microcontroller, PMIC, and three-phase gate driver) are ISO 26262 ASIL-D compliant.
The low integration costs and development effort of the belt-driven integrated starter generator make it an attractive option for manufacturers seeking to implement 48 V mild hybrid electrical systems without significant financial burdens.
In this training you will:
- Learn about the transition from fule injection combustion engine to full battery electric vehicles and the main 48V powered applications.
- Additionally get an overview about Infineon’s comprehensive MOSFET portfolio for 48 V applications and their support material.
- Have an overview of the converters needed in electric vehicles.
- Analyze the 2-quadrant converter topology in buck and boost mode and the half-bridge converter with center tap rectification topology.
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