Back to results
US 7,398,012 B2Granted
Method for powering mining equipment
AssigneeSiemens Energy & Automation, Inc.
InventorWalter Koellner
Life of this patent
Estimating the term…
Abstract
Certain exemplary embodiments can include a static DC electric drive system for mining equipment. The drive system can include: an active front end adapted to receive an AC voltage and output a substantially constant DC voltage; and a DC chopper coupled to the active front end, the DC chopper adapted to receive the substantially constant DC voltage and output a variable DC voltage.
Claims20
A method comprising:
- to control a speed of a motor, via an electric drive system comprising a first direct current (DC) chopper and a second DC chopper, providing current to the motor, said second DC chopper in an anti-parallel arrangement with said first DC chopper, said first DC chopper adapted to provide current to said motor in a first current direction, said second DC chopper adapted to provide current to said motor in a second current direction, each of said first DC chopper and said second DC chopper adapted to act as DC voltage regulators.
Dependencies are inferred from the claim text.