Electric Vehicle Battery Charging Algorithm Using PMSM Windings and an Inverter as an Active Rectifier

Abstract

A major setback for large scale electric vehicle market expansion compared to their internal combustion competitors consists in their high price and low driving range. One way of reducing the cost, dimensions and mass of electric vehicles is to eliminate the dedicated AC/DC converter used for battery charging. Alternatively, charging could be done using the motor windings as grid side inductors and controlling the inverter to operate as an active boost rectifier. The challenge in this approach is the unequal phase inductances which depend on the rotor position. Another problem appears when the battery gets discharged below the peak of the grid voltage, typically if the vehicle has not been used for a longer period of time. To avoid high currents that could damage the battery, a voltage suppression mode is introduced for safe depleted battery charging. This paper proposes and analyzes an integrated charger control algorithm to charge the battery through a permanent magnet synchronous machine (PMSM) windings. Keywords -electric vehicle, battery charging, space vector modulation, asymmetric, unbalanced, active rectifier, voltage suppressionI.

A Review on Power Electronics Technologies for Electric Mobility

“…More specifically, if an asynchronous machine is used, the connection of the stator windings to the power grid will create a rotating magnetic field, which in turn will result in a torque that will force the electric machine to rotate. Figure 25 shows a three-phase topology using the electric machine windings as coupling inductors with the power grid [243]. It should be referred that a special type of ac electric machine must be used in order to accomplish this topology, i.e., an open-end winding electric machine, since it is necessary to have access to the six terminals of the stator windings.…”

PMSG‐based VS‐WECS for constant active power delivery to standalone load using direct matrix converter‐based SST with BESS

“…While under wind shortage interval or when is less than , the stored energy of the battery is supplied back to the system to compensate for the demand‐generation gap. In this mode, the battery voltage is boosted to dc link voltage and then fed back to the system using an active rectifier as an inversion mode [37–40].…”

Overview of fast on‐board integrated battery chargers for electric vehicles based on multiphase machines and power electronics

“…charging from a three-phase grid). Problems are mainly associated with torque production in the machine during the charging process [8][9][10][11]. Namely, if a machine is used as an input filter, three-phase currents flow through the machine windings during the fast charging process.…”