SAM, Starter-Alternator-Motor

In 2005-2006, TM4 successfully completed the development of an electric traction motor and controller for a heavy duty vehicle OEM. Located between the internal combustion engine and the transmission, the electric machine acts as a starter, an alternator and a motor (SAM).

Today, 11 of TM4’s SAM systems are being tested in North America and Europe.

Designed for medium and heavy-duty vehicles, the SAM system will safely stop and restart the engine to save fuel and reduce exhaust emissions and noise. At low speed, the powerful electric motor provides sufficient power and torque traction to enable zero emission mode. During sudden acceleration, the system combines the internal combustion engine and TM4’s powerful electric motor. At high speed, electric power can be generated and used to recharge the batteries, when needed.

Features

High power-to-weight ratio
Efficiency maximized by power allocation control
PM inversed rotor topology

TM4 has the skills and resources to assist you throughout your product development process and supply you with your own SAM design in volume.

Tested System Power Ratings

70 kW continuous / 120 kW peak
400 Nm continuous / 800 Nm peak

Upon completion of an engineering study,
the following power ratings were evaluated

40 kW continuous / 60 kW peak
225 Nm continuous / 400 Nm peak

120 kW continuous / 200 kW peak
675 Nm continuous / 1000 Nm peak