The era of construction machinery electrification，It's really here.。
As the highest level event in the industry，Shanghai 2024, which just endedBAUMAConstruction Machinery Exhibition（Hereinafter referred to as“BMW show”），The leading role is to represent low carbon.、Pure electricity、Mixed green painting of all kinds“Mechanical monster”，Several exhibitors said.“BMW show four years ago.，Foreign brands represented by Caterpillar are the main force.，Fuel Vehicles were the main theme at that time.；And this year's exhibition，Xugong、Trinity、Zhonglian and other domestic brands stand on it.CBit，New energy products have become the absolute core of the exhibition.”。
Compete for the new energy track，The core is still the motor.、Battery、Represented by electronic control“Three electricity”Technology。Among，The motor and the electric drive system are equivalent to the engine of the fuel Vehicle.、Transmission and chassis，Its performance directly affects the overall performance and application experience of the Vehicle.。At this BMW show，With small size、Light weight、Disk-hub axial-flux motors and electric drives typically characterized by high efficiency“Fragrant baboon”，Application of more than 20 exhibits，Whether it's Mining Machinery、Earth-moving machinery，Or Road Machinery、Building materials machinery and other sub-areas and scenarios，They are gradually increasing the application of this innovative technology.。
Actually“Big guy”Equipment，More demand“Small stature”An electric drive
Although a lot of construction machinery and equipment are“Big guy”，But in fact, the restrictions on the layout space are still not small.。Take the new energy loader as an example.，Includes a battery、Electric machinery、All kinds of core components, including electronic control, can only be behind the cockpit.“Square box”Toss and turn in the room，Among，The 5-ton electric loader is generally equipped with a peak power of 200.kWThe travel motor、And 150kWMore than high-power hydraulic pump motor，——Space is limited、High power demand、Multi-module arrangement、Distributed direct drive，Under many tests，The arrangement of the axial flux motor is obviously more reasonable.。
Compared with traditional motor，Under the same power, the volume and deadweight of axial flux motor are reduced by 50%Left and right，Better space adaptability；Deeply developed and innovatively designed，The hub electric loader solution uses a dual shaft extension motor，One side is connected with a hydraulic torque converter and a gearbox，The other side is connected with the air conditioning Compressor and the inflating pump through a belt pulley.，Single motor peak power up to 230kW，The axial dimension is only 251.8mm，No matter“Oil to electricity”Or a newly developed pure electric vehicle?，It has obvious advantages in flexibility in layout.，Especially in“Oil to electricity”Product application，The hub solution requires only the conversion of the engine to an electric motor，Re-selection of some special accessories，No vehicle space adjustment is required，The overall change amount is small，The transformation cycle is fast，The effect is faster。
Requirement for axial dimension，It is more obvious on Road Machinery such as steel wheel roller.。As the core component of the equipment，The steel wheel is the running wheel of the vehicle.，At the same time, it also undertakes the function of vibration operation.，At least two travel drive motors are required for one drum，And a vibration motor working inside the drum；And in terms of the way it's laid out,，It is required that the axial dimension of the driving motor shall not exceed the width of the whole vehicle.，——With TrinitySTR5DE-8 Electric steel wheel roller as an example，The total working weight is close to 5 tons.，When walking, the motor needs to have a strong driving capacity.，However, the total width from the inner wall of the drum to the outer ring does not exceed 300mm，It is very difficult to arrange the traditional radial flux motor.，And a hub is useICS78KAs a travel motor，Its peak power reaches 78kW，Output torque 220N•m,Axial dimension is only 140.5mm；But inside the drum，As the core power source of vibration operation，ICS78KIts powerful performance also enables it to meet the operational needs in a limited layout space.，Do it with ease。
Heavy duty“Ironclad monster”Guys，Want more“Lightweight”An electric drive
In addition to the reduction in motor volume and axial dimension，The axial flux motor also has the advantages of light dead weight,、Typical features and advantages such as high efficiency and large interval，This also enables it to create greater value in more sub-scenarios in the field of construction machinery.。
For example, in the field of infrastructure.，The electrification process of concrete mixer Truck is gradually accelerating.。Under the condition that the upper stirring tank is completely driven by a motor，The dead weight of the electric drive mounted on the axial flux of the disk hub is only 31kg，Which is 50% lower than that of the radial flux driven schema%More；And the suspension arm of the motor is shorter，More stable and reliable link with the tank，It also has less influence on the stress of the tank.。
In addition, in this sessionBAUMAAt the exhibition，Includes a wheel rim/Hub drive，And a hydraulic pump inside the vehicle、Oil pump、Manufacturer of actuators such as driving and decelerating integrated machine，Axial flux motors have also been introduced.。For example, Yining Hydraulic shows.、A disc hub is usedICS160KWheel-side electric driving device for axial flux motor，Motor deadweight 43kg，The unsprung mass is greatly reduced.；With dual gear ratio design，The hinge torque reaches the 22000.N•m，Parking brake torque reaches the 33000.N•m，Whether it's muddy、Sand and stone or other complex working conditions can be easily dealt with.，Particularly suitable for large-scale agricultural machinery.、Application of construction machinery and other products；Axial Flux Electric Drive Assemblies for JL Drives and Sykes Hydraulics Display，In volume、While the weight is greatly reduced，Transmission efficiency far exceeds the average level of similar products，Reatly reduce energy consumption，Supporting construction machinery in long-term operation“Be careful with money”And that energy consumption cost is save。
Counting“Energy saving and cost reduction”Account，The key is to use“High efficiency”An electric drive
“And that energy consumption cost is save”It is one of the core driving factors for accelerating the electrification in the field of construction machinery.，“How to save more energy costs”？The key to the competition is the efficiency of the motor and the electric drive system.。
Although at peak efficiency,，Axial flux motors and radial flux motors are equally divided.，But because of the differences in topology and magnetic field structure,，Axial flux motors tend to have a wider efficient working range than radial flux motors with the same power.，——A hub axial flux motor may operate at 90 degree,%The above working conditions reach 90%More than work efficiency，This makes it not only more advantageous in the application of electric vehicles.，At the same time, the program is being extended、The hybrid technology route can also perform better.。
For example, in the application of high-power range extender，The disk structure of the axial-flux machine allows it to be fully mated to the engine's flywheel housing，Axial dimension reduction2/More than 3，The structure is more compact；And，The wider efficient working range can be further overlapped and matched with the efficient working range of the engine，So that the entire system has been operating at the best economic point.，The oil-electricity conversion ratio of the range extender Generator adopting the disc hub axial flux motor can reach 4.More than 2。
Carry on that specific use equipment，High efficiency disc hub axial flux motors tend to have better power and endurance performance.。For example, in the application of wide-body mining card，Power transmission chain of integrated heavy Truck electric drive axle with disc hub axial flux motor is shorter，More wheel end feedback torque，More energy can be recovered during braking，Actual application effect of a mining area in East China，The disc hub to which it is appliedICS400KMotor driven wide body mining card，The length of the climbing section in the running route is 2 km.，Limit slope 13°、Average slope 7°，Uphill with no load、Under the working condition of heavy load downhill，You can almost do it without charging.，“Sometimes the electricity generated by the vehicle itself can not be used up.，They even have to run over the mountains for a while to consume the excess electricity.。”
At present，Disc hub axial flux motors and electric drive products have been used in Excavators in the field of construction machinery、Loader、Pure electric/Extended Range Wide Body Mine Card、Milling Machine、Road Roller、Paver、Crawler Crane、Batch application of various products such as concrete mixer Truck，Product innovation for each subdivision scenario、Technological innovation、Value innovation provides core drive。
The relevant forecast shows，2025—2026，China's pure electric construction machinery industry will reach the outbreak point，The penetration rate of electric construction machinery is expected to reach 20% next year%，This is the trend of the times.，It is also the direction of the market.。Standing on the tuyere of the whole society sounding the trumpet of new energy electrification，Disc hub is the first enterprise in the world to realize the large-scale production and application of axial flux motor.，Will continue to uphold“Scientific and Technological Innovation Drives Enterprise Development”The idea of，Continuously create more value for customers and users、Products with better performance，Together with partners from all walks of life，Promote the technological revolution of the electric drive industry！
