Nissan Ariya: Description

Outline. Front Traction Motor System

The front traction motor contains a compact, lightweight, high output, high efficiency “Externally Excited Synchronous Motor (EESM)”.
The inverter (front) is a device which converts DC power from the Li-ion battery to AC power, and drives the traction motor. Because the AC power frequency and voltage can be varied when the DC power is converted to AC power, it provides control performance with a high degree of freedom.

Motor model (front)	AM67
Axle type	2WD		AWD
Li-ion battery specifications	66kWh	91kWh	66kWh	91kWh
Max torque [N·m (kgf-m, ft-lb) /rpm]	300 (30.6, 221) / 0-4392
Max output [kW (PS, HP) / rpm]	160 (218, 214) / 5950-13000	178 (242, 239) / 6600-7200	160 (218, 214) / 5950-13250
Max speed (rpm)	13250
Cooling system	Water cooling type

Location of Front Traction Motor Model Number and Serial Number Stamps

MOTOR MECHANISM (DIAGRAM)

	Stator coil		Rotor coil		Rotor core
	Stator core		Shaft

Operation Description

DC power from Li-ion battery is converted to AC power with switching by IGBT. When three-phase AC current is passed through the coil of the stator core, rotating magnetic field is generated. Electromagnet of the rotor is pulled by the rotating magnetic field and rotates in synchronizing with the rotating magnetic field, so that torque is generated. The generated torque is almost proportional to the current, and the rotation speed depends on the three-phase AC frequency.
In order to rotate the rotor optimally, it is necessary to determine the position (angle) of the rotor's electromagnet and the timing when the current flows through the coil. Therefore, using the traction motor resolver and the current sensor, the motor controller constantly detects the rotational position of the rotor and controls the timing when the current flows through the coil.