The new Rotor Lock Actuator was unveiled by Vitesco technology, a global supplier of cutting-edge drive technology and electrification solutions, during the SIA Powertrain exhibition, which took place in Lille, France, from June 19–20, 2024.
This electric vehicle (EV) module combines three crucial features into one unit: optional brush system for externally excited synchronous machines (EESM), precise rotor position detection, and a park lock feature. Consumer expenses are decreased, complexity is diminished, and less space is required on the e-axle thanks to this integration.
Most electric vehicles (EVs) use a mechanical park lock in the reducer gearbox in addition to the wheel-mounted park brakes, which is a standard method of safe and secure parking. EVs offer more functionality at a lower cost. Nonetheless, this arrangement takes up a lot of room. The creative rotor lock technique creates a more efficient and economical system design by moving the park lock functionality from the gearbox to the e-machine’s rotor shaft.
As Vitesco Technologies’ Head of the Actuation Business Unit Robert Paul notes, cutting costs and complexity is essential to the success of electric mobility. He notes that their Rotor Lock Actuator delivers high functionality while effectively optimizing space and costs by merging up to three functionalities into a single device. The smaller actuator is positioned at the end of the rotor shaft and fits in perfectly with the vehicle’s drive system. Because of the high level of mechatronic integration, vehicles can be packaged more compactly. This arrangement also makes it possible to incorporate additional features within the module, including the inductive Rotor Position Sensor and the brush system for EESM, which further lowers costs by doing away with the need for separate control units, sensors, and harnesses.
Strong cyber security measures, sophisticated internal diagnostics, and sensor redundancy are all used to improve the module’s dependability and safety. Easy installation is made possible by the Rotor Lock Actuator’s seamless integration into the drivetrain and communication networks. By maximizing motor commutation control, its inductive Rotor Position Sensor function extends its range. Additionally, by reducing vehicle movement when the rotor lock is engaged, it enhances parking safety. In less than 250 milliseconds, the locking element and rotor’s clever interface design activates and deactivates to prevent unintentional lock engagement while driving.
