ELECTRIC VEHICLE (EV) CONTROLS
SEDEMAC has been developing a suite of products for OEMs participating in the EV story. SEDEMAC provides complete control and power electronics solution-set for 48V electric vehicle (EV) and hybrid electric vehicle (HEV) systems. The portfolio includes motor controllers, battery management systems, and DC/DC converters.
SEDEMAC’s sensorless motor controls offering, Weber, is a product-series of Field Oriented Control (FOC) enabled BLDC motor controllers. These controllers operate two control loops; the inner control loop controlling machine currents for optimal torque generation, and the outer control loop controlling torque reference and field weakening logic. Weber also has a regenerative braking logic for energy efficient operation of the vehicle.
Weber comes in two variants – Weber-S; is suitable for lower power (~2 kW) applications, while Weber-D; is designed for mid power (~10 kW) applications.
The battery management segment is catered by Ursa BMS, intended for 48V lithium ion batteries. It has modern State of Charge (SOC) estimators. Ursa supports up to 14 cells in series. It monitors cell voltages, battery pack temperature, and battery pack current to enable passive balancing, battery protection and battery state estimation.
Modern state of charge estimators based on Kalman filters in BMS, provide a significant improvement in SOC estimation as compared to traditional algorithms such as coulomb counting or terminal voltage-based state estimation