# US 9,518,427 B2 · Mining vehicle and method for its energy supply

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- Number: US 9,518,427 B2
- Document ID: US9518427B2
- Status: Granted
- Kind: B2
- Application number: 14/503,806
- Filed: 2014-10-01
- Published: 2015-04-02
- Granted: 2016-12-13
- Earliest claimed: 2013-10-02
- Assignees: Sandvik Mining and Construction Oy
- Applicants: Sandvik Mining and Construction Oy
- Inventors: Mikko Kouvo; Samuli Kouhia
- Web page: https://patentgrep.com/patent/US9518427B2

## CPC

- E21B 7/025: {Rock drills, i.e. jumbo drills}
- B60L 1/00: Supplying electric power to auxiliary equipment of vehicles (circuit arrangements for charging batteries H02J7/00)
- B60L 1/003: {to auxiliary motors, e.g. for pumps, compressors}
- B60L 9/24: fed from AC supply lines
- B60L 50/40: using propulsion power supplied by capacitors
- B60L 50/51: characterised by AC-motors
- B60L 53/14: Conductive energy transfer
- E21B 7/022: {Control of the drilling operation; Hydraulic or pneumatic means for activation or operation (control circuits for drilling masts E21B15/045)}
- E21B 23/0419: {using down-hole motor and pump arrangements for generating hydraulic pressure}
- E21F 17/06: Distributing electric power; Cable networks; Conduits for cables (circuit arrangements for supplying or distributing electric power in general H02J)
- B60L 2200/40: Working vehicles
- B60L 2220/42: with use of more than one motor
- B60L 2220/54: Windings for different functions
- Y02T 10/64: Electric machine technologies in electromobility
- Y02T 10/70: Energy storage systems for electromobility, e.g. batteries
- Y02T 10/7072: Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
- Y02T 90/12: Electric charging stations
- Y02T 90/14: Plug-in electric vehicles
- Y02T 90/16: Information or communication technologies improving the operation of electric vehicles
- E21B: EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- B60L: PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES (arrangements or mounting of electrical propulsion units or of plural diverse prime-movers for mutual or common propulsion in vehicles B60K1/00, B60K6/20; arrangements or mounting of electrical gearing in vehicles B60K17/12, B60K17/14; preventing wheel slip by reducing power in rail vehicles B61C15/08; dynamo-electric machines H02K; control or regulation of electric motors H02P); SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES (electric coupling devices combined with mechanical couplings of vehicles B60D1/64; electric heating for vehicles B60H1/00); ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL (control or regulation of electric motors H02P); MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- E21F: SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION

## Abstract

The mining vehicle has a carriage, driving equipment for moving the carriage, at least one mining work device, an electric motor for supplying power to the mining work device, a connection for supplying electric power to the electric motor from an electrical network of the mine, and an energy source. The electric motor has at least a primary stator winding and a secondary stator winding galvanically isolated from each other. When the mining vehicle is connected to the electrical network of the mine via the primary stator winding, the electric motor is arranged, at least for a period of time, to supply power to the at least one mining work device and, at least for a period of the time, to supply power via the secondary stator winding for charging the energy source. A method for energy supply of a mining vehicle is also provided.

## Claims

### Claim 1

A mining vehicle comprising:
a carriage;
driving equipment for moving the carriage;
at least one mining work device;
at least one electric motor for supplying power to the mining work device;
a connection for supplying electric power to the electric motor from an electrical network of the mine; and
an energy source, wherein the electric motor includes at least a primary stator winding and a secondary stator winding, the primary stator winding and the secondary stator winding being galvanically isolated from each other, and when the mining vehicle is connected to the electrical network of the mine via the primary stator winding, the electric motor is arranged, at least for a period of time, to supply power to the at least one mining work device and, at least for a period of time, to supply power via the secondary stator winding for charging the energy source, wherein the electrical network of the mine and the energy source are galvanically isolated from each other.

### Claim 2 (depends on 1)

A mining vehicle as claimed in claim 1, wherein the electric motor includes a rotor and a shaft connected to the rotor, wherein electric energy supplied via the primary stator winding is arranged, at least for a period of time, to rotate the rotor and thereby the shaft.

### Claim 3 (depends on 2)

A mining vehicle as claimed in claim 2, further comprising a hydraulic pump for supplying hydraulic pressure to the mining work device, wherein the shaft is arranged to rotate the hydraulic pump.

### Claim 4 (depends on 1)

A mining vehicle as claimed in claim 1, further comprising a control unit arranged to control charging of the energy source which is to be performed when maximum power is not supplied to the mining work device.

### Claim 5 (depends on 1)

A mining vehicle as claimed in claim 1, further comprising a control unit arranged to control charging of the energy source which is to be performed simultaneously with supplying of power to the mining work device.

### Claim 6 (depends on 1)

A mining vehicle as claimed in claim 1, further comprising a control unit arranged to control supply of energy to the mining work device simultaneously from both the electrical network of the mine and the energy source of the mining vehicle at least for a period of time.

### Claim 7

A method for energy supply of a mining vehicle, the method comprising charging an energy source of the mining vehicle, the mining vehicle including a carriage, driving equipment for moving the carriage, at least one mining work device, at least one electric motor for supplying power to the mining work device, a connection for supplying electric power to the electric motor from an electrical network of the mine, and the energy source, wherein the electric motor includes at least a primary stator winding and a secondary stator winding, the primary stator winding and the secondary stator winding being galvanically isolated from each other such that the electrical network of the mine and the energy source are galvanically isolated from each other and wherein, when the mining vehicle is connected to the electrical network of the mine via the primary stator winding, the electric motor supplies, at least for a period of time, power to the at least one mining work device and supplies, at least for a period of time, power via the secondary stator winding, thereby charging the energy source.

### Claim 8 (depends on 7)

A method as claimed in claim 7, wherein charging of the energy source is performed when maximum power is not supplied to the mining work device.

### Claim 9 (depends on 7)

A method as claimed in claim 7, wherein charging of the energy source is performed simultaneously with supplying of power to the mining work device.

### Claim 10 (depends on 7)

A method as claimed in claim 7, wherein, at least for a period of time, energy is supplied to the mining work device simultaneously from both the electrical network of the mine and the energy source of the mining vehicle.

### Claim 11 (depends on 1)

A mining vehicle as claimed in claim 1, wherein only the primary stator winding and the secondary stator winding are galvanically isolated.

### Claim 12 (depends on 7)

A method as claimed in claim 7, wherein only the primary stator winding and the secondary stator winding are galvanically isolated from each other to galvanically isolate the electrical network of the mine and the energy source.