e-Powertrain Control Technology

Nissan's EVs and e-POWER vehicles have been developed with a focus on delivering responsive performance by controlling acceleration at the speed of electrical signals.

In gasoline-powered vehicles, acceleration response is constrained by airflow and mechanical processes. Electric motors, by contrast, respond directly to electrical signals, enabling exceptionally quick acceleration response and delivering smooth, refined performance.

Motor: When the accelerator pedal is pressed, the motor sends a signal to the inverter to increase torque. The inverter then increases the current supplied to the motor, accelerating the vehicle.

Engine: When the accelerator pedal is pressed, the engine opens the throttle to increase air intake, injects fuel and raises piston speed, accelerating the vehicle.

Nissan's proprietary motor control technology delivers responsive, smooth performance that closely follows the driver’s accelerator input, combining precise vehicle control with a refined driving experience.

As this motor control technology continues to evolve, it also helps suppress both vibrations and even the slightest noise generated by the gears. The Nissan Ariya uses an Electrically Excited Synchronous Motor (EESM), which controls magnetic force according to driving conditions to reduce noise generated by the motor itself.

Nissan's advanced motor vibration-control technology enables both high responsiveness and smooth acceleration and deceleration by balancing these competing performance characteristics.

When the motor rapidly generates high torque, the shaft can twist and create vibrations. By anticipating this shaft twist and precisely controlling the motor, the technology suppresses vibrations while delivering immediate, powerful acceleration.

Because there is a small amount of play between the meshing gears, the contact between the gear teeth changes when switching between acceleration and deceleration, causing noise and vibrations.

By anticipating these changes in how the gear teeth make contact and precisely controlling the motor, the technology reduces the resulting noise and vibrations.