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Bosch SMG 180/120 electric motor for compact EVs and hybrids

The compact Bosch SMG (“separate motor generator”) 180/120 (180 millimeters in diameter, 120 millimeters long) electric motor is used as the traction motor in the Fiat 500e and smart fortwo electric drive EVs. The 32 kg (70.5 lb) permanent magnet synchronous motor can be used in hybrids as well—one example being its application on the rear axle of the Peugeot 3008 diesel hybrid.

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The Bosch SMG 180/120. Click to enlarge.

The 3008 HYbrid4 incorporates another Bosch permanent magnet synchronous motor, the SMG 138/80 (138 millimeters in diameter, 80 millimeters long) in the engine compartment to serve as a high-voltage starter/alternator for the start-stop system. However, it is primarily responsible for supplying power to the rear-wheel drive.

In hybrids, the SMG 180/120 motor supports the combustion engine with an output of up to 40 kW. In purely electric vehicles and plug-in hybrids, the SMG 180/120 delivers an output of up to 80 kW. The SMG 180 delivers up to 200 N·m (148 lb-ft) of torque. Top speed is 12,000 rpm.

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Bosch’s motor portfolio for e-mobility. Source: Bosch. Click to enlarge.

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