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US 2015/0306972 A1Published application
Electrical apparatus and method for powering an electrical machine
AssigneeVolvo Lastvagnar AB
InventorsErik Hoevenaars, Mats Alakula
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AssigneeVolvo Lastvagnar AB
InventorsErik Hoevenaars, Mats Alakula
Estimating the term…
An electrical apparatus for powering an electrical machine with two different energy sources includes an electrical drive system having a battery and a super capacitor, and an electrical machine, wherein the electrical machine includes a rotor, a first separate multi-phase stator winding and a second separate multi-phase stator winding, wherein the drive system includes a first multi-phase bridge inverter connected to the first multi-phase stator winding, and wherein the apparatus further includes a second multi-phase bridge inverter connected to the second multi-phase stator winding and to the battery, where the first multi-phase bridge inverter is connected to a super capacitor, and where the drive system includes a switch adapted to connect and disconnect the DC links of the first multi-phase bridge inverter to and from the second multi-phase bridge inverter. The super capacitor can be used to both deliver and absorb transient power peaks which can prevent the battery from exposure of the power peaks which can improve the battery life.
An electrical apparatus (1) for powering an electrical machine with two different energy sources, comprising an electrical drive system (2) having a battery (8) and a super capacitor (14), and an electrical machine (3), wherein the electrical machine comprises a rotor, a first separate multi-phase stator winding (4) and a second separate multi-phase stator winding (5), wherein the drive system comprises a first multi-phase bridge inverter (6) connected to the first multi-phase stator winding (5), characterized in that the apparatus further comprises a second multi-phase bridge inverter (7) connected to the second multi-phase stator winding (5) and to the battery (8), where the first multi-phase bridge inverter (6) is connected to a super capacitor (14), and where the drive system comprises a switch (12) adapted to connect and disconnect the first multi-phase bridge inverter (6) to and from the second multi-phase bridge inverter (7).
A method for powering an electrical machine by using an electrical drive system (2) comprising first and second multi-phase bridge inverters (6, 7), a battery (8) and a super capacitor (14), wherein the electrical machine comprises a rotor and first and second separate multi-phase stator windings (4, 5) that are magnetically coupled to each other, where the battery is connected to the second multi-phase bridge inverter (7) and the super capacitor is connected to the first multi-phase bridge inverter (6), comprising the following steps:
Dependencies are inferred from the claim text.