Crankshaft starter generator 48 V – inverter ISG
More torque power but a bigger impact on placement in the powertrain architecture
The crankshaft-mounted integrated starter generator (CISG) in P1 configuration is a space-limited component between the engine and clutch. It offers higher torque power but lower energy recuperation efficiency due to friction losses. Infineon provides an ISO 26262 ASIL-D compliant comprehensive system solution for efficient space usage, which includes supply ICs, microcontrollers, sensors, power drivers, and MOSFETs.
For more details on HV main inverter, you can visit the dedicated application page (H)EV main inverter - hybrid / electric vehicle.
Crankshaft-mounted integrated starter generator (CISG) 48 V
The crankshaft-mounted integrated starter generator (CISG) in P1 configuration is installed in a tight space between the internal combustion engine and the clutch. Unlike traditional setups with belts that had limitations due to slipping and fatigue, the crankshaft starter generator can supply more torque power. However, the efficiency of energy recuperation is still low due to losses from engine and transmission friction.
The limited space availability means that the electrical machine used in the CISG is typically a permanent magnet synchronous type. It operates up to a maximum peak power of 20 kW, providing medium- to high-power density in either a three-phase or six-phase configuration.
Compared to the traditional belt-driven integrated starter generator (BISG), the CISG is more expensive and has a greater impact on placement within the powertrain architecture.
- Higher torque power
- Efficient space usage
- Comprehensive system solution
- ISO 26262 ASIL-D compliant
Infineon's 48 V CISG: Highly integrated and space-saving solutions
Infineon provides a complete and highly integrated system solution designed to save space in modern automotive powertrains. The solution includes a wide range of components, such as supply ICs, microcontrollers, sensors, smart power drivers, high-power MOSFETs, and transceivers. In comparison to traditional belt-driven systems, it offers higher torque power, enhancing overall performance, but lower energy recuperation efficiency due to friction losses.
To meet safety requirements, the key components, namely the microcontroller (µC), the power management integrated circuit (PMIC), and the three-phase gate driver, comply with ISO 26262 ASIL-D standards. This ensures that the system meets high safety levels for automotive applications.
Comprehensive solutions for a range of applications
The crankshaft-mounted integrated starter generator (CISG) is a space-saving solution used in modern automotive powertrains. It replaces traditional belt-driven systems and offers higher torque power, enhancing overall performance.
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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