Tag Archives: electric drive

Conuma Coal chooses Komatsu 830E-5 electric drive haul trucks for Wolverine

Conuma Coal Resources has replaced a fleet of haul trucks at its Wolverine metallurgical coal mine, in British Columbia, Canada, with five new Komatsu electric 830E-5 models supplied by dealer SMS Equipment.

Conuma said it carried out “comprehensive engineering and financial analysis” on this move and determined the deployment of the new trucks would “meaningfully increase production” at the mine, largely due to their improved overall availability. Contributing factors included easier maintenance and higher durability, while the 830E-5’s are also quieter and more fuel-efficient than the existing haul trucks, according to the company.

John Schadan, Conuma’s President, said: “Conuma is confident that we have chosen the right partners for results with Komatsu equipment and SMS Equipment’s parts, service and support. Their proven results and experience speak to the quality of their products and service.”

The first 227 t-payload 830E-5 was released to the mine, which produces more than 1.5 Mt/y of hard coking coal, at the end of August, and the remainder of the fleet will be delivered over the next two months. The new trucks complement existing equipment that SMS Equipment supports on Conuma’s mine sites, the companies said.

Dennis Chmielewski, EVP of Mining at SMS Equipment, said: “SMS Equipment is committed to working with Conuma through the long term to ensure full support, resulting in maximised uptime and availability of their Komatsu fleet.”

The Komatsu 830E-5 electric truck is a leader in the 250-ton (227 t) class market with proven durability and reliability, according to the mining OEM. Powered by a 2,500 hp (1,864 kW) Komatsu SDA16V160 engine, the drive system provides efficient transfer of power to the ground while realising low fuel consumption and excellent reliability, it added.

XCMG electric-drive XDE120 dump trucks on their way to Australia mines

XCMG says it has successfully delivered an order of 12 XDE120 electric drive dump trucks to Australia, achieving another breakthrough in the export of large-scale mining equipment in the “high-end market”.

The XDE120 is one of the first 100 t electric drive dump trucks designed for mining. With a 1,200 hp (895 kW) engine, the model XDE120 adopts the industry’s latest AC variable frequency drive system and “leads in function and performance among products of the same level designed to operate in open-pit mining projects”, XCMG says.

Zong Li, Vice General Manager of XCMG, said: “XCMG abides by the golden standard of ‘Advanced and Endurable’ in every link of production, it’s what earned us the trust and recognition in the Australian market, our products satisfy all requirements for mining operations in Australia, and we have tailored professional services to add value and assist our customers further.”

Since 2018, XCMG has exported a series of products to Australia customers, including the mass export of GR3505 mining graders, China’s largest tonnage loader, the LW1200KN, mining solution sets and the latest 12 XDE120 electric drive dump trucks.

To date, XCMG has established more than 30 standards and regulations in design, manufacturing and quality assurance for the Australian market, as well as creating 15 customised designs, it said. “The brand’s mining equipment can overcome a considerable numbers of difficulties, including an extreme surface temperature of 50°C and difficult construction scenarios.”

Li added: “In recent years, XCMG has achieved continuous success in high-end mining markets. Our construction solution sets and technologies are taking the lead in a competitive industry, and we hope more people can learn about the XCMG brand, our strong technologies and reliable quality.”

Caterpillar talks up its new ultra-class electric drive mining trucks

Caterpillar has announced more details on the two new ultra-class mining trucks to join its portfolio, the Cat 798 AC and Cat 796 AC.

IM was on site in Tinaja Hills, Arizona, to witness the grand unveiling and saw the 798 AC in action.

The company said the decision to add the new models was based on providing its customers with more options at the highest end of its payload scale regarding electric or mechanical drive.

The 798 AC features a 372 t payload and joins the mechanical-drive Cat® 797F in the 400-short-ton size class. The 797F has been a popular choice with more than 1,000 sold to the oil sands, copper, coal and iron ore markets.

The electric-drive 796 AC delivers 326-tonne (360-ton) payload. With Cat deciding the 795 AC will not being offered in Tier 4 Final configuration, the 796 AC is likely to act as a replacement in regions where engine emissions are highly regulated, such as the US and Canada.

When comparing field test data of the 795F and 798 AC, the new and larger model was shown to carry, on average, carry 12.9% more payload, boost productivity by 17.2% and exhibit 4% faster cycle times.

Cat’s Jeff Castleman, in charge of new product introduction in the large mining trucks range, said at the truck unveiling the company was able to move from design to production in the field with the 798 AC in just one year.

It was able to achieve this as the machine is based off the old Unit Rig MT6300 AC design, a product line that came with the 2011 acquisition of Bucyrus.

Cat says both trucks will be available in June quarter of 2019, but IM understands two 798 ACs have been undergoing trials at Arch Coal’s Black Thunder coal mine in Wyoming, US, for close to six months, an operation that formerly used at least one MT6300 AC.

While the company expects the mechanical drive 797F to remain a leader in the Canadian oil sands sector – around a third of sales have been to this market segment – studies comparing the two showed the new 798 AC could more than hold its own when it comes to hauling on grade and getting out of the sticky underfoot conditions sometimes present at these mines. This is also backed up by the fact two MT6300 ACs previously operated in the Canadian oil sands.

The design of the new trucks focuses on delivering class-leading payload, high reliability and simple serviceability, Cat says. These attributes are built on the frame and chassis design proven in 18 million hours of legacy truck operation and now used by the Cat 794 AC.

The AC powertrain of each of the two new trucks draws from the Cat 795 AC and Cat 794 AC, which have been operating successfully for about 5 million hours. The electric drive is developed and manufactured by Caterpillar and is the single source for the entire powertrain, a key selling point of the truck when it comes to serviceability and operation in the field.

The Cat C175-16 diesel engine powers both trucks. With more than 21 million hours of operation in mobile equipment and power generation, the engine can be configured to meet US EPA Tier 4 Final emissions regulations and offers a choice of 2,610 kW (3,500 hp) or 2,312 kW (3,100 hp) to meet the mine’s needs.

“To further adapt to the mine, software changes can adjust system power to help meet production targets or to work smoothly in mixed fleets,” Cat says.

Both truck models are designed to minimise empty machine weight, as configured in the field, enabling the 798 AC to carry its class-leading payload of 372 t and to haul more material each cycle on 59/80R63 tyres.

Both new trucks feature four-corner, oil-cooled disc brakes as well as dynamic braking for stable handling and fast stopping. Superior retarding capability, blended braking and the Cat Traction Control System help boost productivity and enhance safety.

The Cat AC drive is a high voltage system (2,600 volts) that operates at lower current than most competitors’ systems. When combined with full integration of the power train, the result is lower heat generation, smaller and lighter components, and longer component life.

In terms of the trucks’ body design, the Cat High Efficiency body is sized and configured to meet the specific needs of the mine, dictated by fragmentation, abrasion, cohesion and the loading tool. The curved floor, front, and canopy strengthen the entire body, which is integral to the truck. The body is sized to meet the payload requirements without compromising vehicle balance, braking or control.

Open engine access and service platforms ease maintenance tasks, with the modular design allowing easy removal and installation of components. The engine, traction alternator, motors, inverter, grid and final drives can be removed independently, again speeding up maintenance tasks.

Traction alternator and optional inverter platforms allow for easier inspections, diagnostics and component swaps. The result is less service time and greater uptime, Cat says.

Caterpillar to complete ultra-class electric drive haul truck line

Caterpillar is set to add to its electric drive haul truck line, with two new ultra-class models being readied for launch.

Cat already has the 794 AC (pictured) and 795F AC in electric drive, but the 796 AC and 798 AC haul trucks will soon be added to the platform, Caterpillar Senior Product Specialist Antonio Varela confirmed on a visit to the company’s Decatur truck manufacturing facility in Illinois on Tuesday.

More details are expected later this week, but Varela confirmed the truck chassis will be a larger version of the 794 AC (previously the MT5300) chassis, which has been proven in the field at many mines.

As the brand names indicate, the new machines will have a higher payload capacity than the 291 t 794 AC and the 327 t 795F AC.

This development shows how the company is continuing to invest in both electric and mechanical drive options on even the largest of its haul trucks – a key differentiator for the company in the OEM space. It also indicates there is significant demand for electric drive at the top end of the haulage market.

Cat’s ultra-class electric drive truck platform was established with the addition of the Unit Rig™ product line. This line came with the acquistion of Bucyrus back in 2011.