High-Frequency 360kW Motor Control Using Modular Switched Battery Technology

Inhalt:
A primary goal of reconfigurable battery systems is to isolate faulty cells, ensuring both safety and continuity of operation. This technology uses semiconductor elements to dynamically modify electrical interconnections. The system presented adjusts the number of series stages in real-time to control a threephase AC motor while simultaneously balancing the state-of-charge of the cells. This study evaluates the feasibility of controlling a 360 kW three-phase motor from 50 Hz to 1250 Hz using a configuration of three arms (one for each phase). Each arm is made up of 4 modules, each modules is made up of 7 switchable CellBlocks of 2.8 kWh placed in parallel, and each CellBlocks is made of 13 cells in series. The proposed electrical architecture enables the CellBlocks to be isolated in a 4S7P structure. The system is validated by simulation, and a 120 kW one-phase demonstrator is built for experimental testing.