System and method for supplying electric energy to a mining vehicle and a mining vehicle
AssigneeSandvik Mining and Construction Oy
InventorsMikko KOUVO, Raimo JUNTUNEN
Life of this patent
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Abstract
A system and method for supplying electric energy to a mining vehicle and a mining vehicle are provided. Electric energy is supplied to the mining vehicle using a system including a bipolar LVDC supply having a certain total voltage. The mining vehicle has at least a first energy unit and a second energy unit. The first energy unit is connected to a part of the certain total voltage and the second energy unit is connected to another part of the certain total voltage.
Claims14
A system for supplying electric energy to a mining vehicle, the system comprising:
- a bipolar LVDC supply having a certain total voltage and comprising a positive pole and a negative pole and a neutral point between the positive pole and the negative pole, wherein the total voltage is divided into two equal halves that are substantially equal;
- and
- the mining vehicle, the mining vehicle including at least a first energy unit and a second energy unit, the first energy unit being connected between the positive pole and the neutral point and the second energy unit being connected between the negative pole and the neutral point, wherein the bipolar LVDC supply includes a first converter and a second converter connected in series whereby the neutral point is arranged between the first and second converters to keep the total voltage balanced between the two equal halves.
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A method of supplying electric energy to a mining vehicle, comprising:
- providing a mining vehicle, the mining vehicle including at least a first energy unit and a second energy unit;
- supplying electric energy to the mining vehicle from a bipolar LVDC supply having a certain total voltage, the bipolar LVDC supply including a positive pole and a negative pole and a neutral point between the positive pole and the negative pole, wherein the total voltage is divided into two halves that are substantially equal;
- connecting the first energy unit to a part of said certain total voltage and connecting the second energy unit to another part of said certain total voltage, wherein the first energy unit is connected between the positive pole and the neutral point and the second energy unit is connected between the negative pole and the neutral point, wherein the bipolar LVDC supply is formed by connecting a first converter and a second converter in series and arranging the neutral point between the first and second converters.
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A mining vehicle, comprising:
- at least a first energy unit;
- a second energy unit;
- and
- connecting means for connecting the the first and second energy units to a bipolar LVDC supply having a certain total voltage, the bipolar LVDC supply including a positive pole and a negative pole and a neutral point between the positive pole and the negative pole, wherein the total voltage is divided into two halves that are substantially equal, wherein the first energy unit is connected to one half of the certain total voltage and the second energy unit is connected to another half of the certain total voltage wherein the bipolar LVDC supply includes a first converter and a second converter connected in series, whereby the neutral point is arranged between the first and second converters to keep the total voltage balanced between the two equal halves.
Dependencies are inferred from the claim text.