US 12,403,783 B2
Charging system and method of using same
Ari Berger, Vancouver (CA); Harald Hengstenberger, Fürstenfeldbruck (DE); and Jalal Amini, Vancouver (CA)
Assigned to Hillcrest Energy Technologies Ltd., Vancouver (CA)
Appl. No. 18/564,040
Filed by HILLCREST ENERGY TECHNOLOGIES LTD., Vancouver (CA)
PCT Filed May 26, 2022, PCT No. PCT/CA2022/050859
§ 371(c)(1), (2) Date Nov. 24, 2023,
PCT Pub. No. WO2022/246573, PCT Pub. Date Dec. 1, 2022.
Claims priority of provisional application 63/193,361, filed on May 26, 2021.
Prior Publication US 2024/0253490 A1, Aug. 1, 2024
Int. Cl. B60L 53/20 (2019.01); H02J 7/00 (2006.01); H02J 7/02 (2016.01); H02J 7/14 (2006.01); H02J 7/16 (2006.01); H02M 1/10 (2006.01); H02M 3/158 (2006.01); H02M 7/797 (2006.01)
CPC B60L 53/20 (2019.02) [H02J 7/0029 (2013.01); H02J 7/0047 (2013.01); H02J 7/02 (2013.01); H02J 7/1423 (2013.01); H02J 7/163 (2013.01); H02M 1/10 (2013.01); H02M 3/1586 (2021.05); H02M 7/797 (2013.01); H02J 2207/20 (2020.01)] 26 Claims
OG exemplary drawing
 
1. A method of operating a charging system, the charging system comprising: (i) an electric machine comprising at least three stator windings and at least one rotor winding; and (ii) a control system comprising a converter coupled to the at least three stator windings and the at least one rotor winding for controlling excitation of each of the at least three stator windings and the at least one rotor winding; the method comprising:
(a) Operating in at least one of a charging mode or a discharging mode; and
(b) determining if a type of a power source is DC or AC; and
(i) upon determining that the type of the power source is DC, then performing one of the following steps:
(A) bypassing the electric machine to charge a battery system from the power source, upon finding the power supply voltage Vs of the power supply is within a voltage operating range of the battery system;
(B) using the stator windings as inductors wherein the converter acts as DC/DC in buck or boost mode, in said discharging or charging mode, respectively;
(C) protecting the battery system upon finding that Vs is greater than an upper limit of the voltage operating range; and
(ii) upon determining that the type of the power source is AC, then performing one of the following steps:
(A) injecting excitation into the at least one rotor winding to induce a voltage into the at least one of the stator windings with 180 degree phase shift to the voltage of the power source, upon finding the power supply voltage Vs of the power supply is greater than the voltage of the battery system;
(B) terminating the excitation into one of the at least one rotor winding, upon finding the power supply voltage Vs of the power supply is not significantly lower than the voltage of the battery system;
(C) injecting excitation into the at least one rotor winding to induce a voltage into the at least one of the stator windings in-phase with the voltage of the power source, upon finding the power supply voltage Vs of the power supply is smaller than an acceptable voltage of the battery system.