| CPC B60L 15/2045 (2013.01) [B60L 15/007 (2013.01); B60L 15/04 (2013.01); B60L 15/2009 (2013.01); B60L 50/15 (2019.02); B60L 50/30 (2019.02); B60L 50/50 (2019.02); B61C 3/02 (2013.01); H02P 7/298 (2013.01); B60L 2200/26 (2013.01)] | 19 Claims |
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1. A locomotive comprising:
a prime mover;
a converter mechanically coupled to the prime mover;
an energy management device; and
a DC power bus being supplied electric power by the converter, wherein the DC power bus is controllably connected through a chopper circuit to:
a traction motor capable of operating in a motoring mode and a dynamic braking mode, the traction motor including a DC shunt motor;
an energy storage device capable of capturing electric power from and supplying electric power to the DC power bus; and
a resistor grid capable of dissipating electric power as heat;
wherein the chopper circuit includes a plurality of power semiconductors, each having a variable switching frequency, and is controlled by the energy management device to control a current supplied to each of the traction motor, the energy storage device, and the resistor grid;
during the motoring mode, the energy management device is configured to operatively control, through the chopper circuit, a current supplied to the traction motor; and
during the dynamic braking mode, the energy management device is configured to operatively control, through the chopper circuit, a power distribution between the energy storage device and the resistor grid.
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