| http://www.w3.org/ns/prov#value | - According to yet another aspect of the invention, an auxiliary drive system including a first energy storage device coupled to a first DC bus, the first energy storage device configured to output electrical power to the first DC bus, a first bi-directional buck/boost converter coupled to a second DC bus and to the first DC bus, the first bi-directional buck/boost converter configured to output a f
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