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Hydraulic ExcavatorsHybrid PC200LC-8Komatsu Ushers in a New Era inExcavator TechnologyThe history of Hybrid construction machinery hasjust started. This turning point in constructionequipment technology will reshape our industry andhave an impact for years to come.Komatsu Harmony is fundamental in matching thediesel/electric Hybrid system to the hydraulicrequirements to provide high productivity with lowfuel consumption. The Hybrid controller synchronizesthe conventional engine and hydraulic pumps withelectric assist to provide a unique operationalexperience. The more the Hybrid technology isutilized by swinging and regenerating energy, thegreater the fuel consumption benefit.ModelOperating weightArmArm digging force (SAE)Bucket digging force (SAE)Swing torquePC200LC-8 Hybrid/PC200LC-8 (conventional)20900 - 21437 kg43,643 - 47,260 lb2925 mm 9'7"12600 kgf 27,780 lb14100 kgf 31,080 lb6900 kg•m 49,907 ft lbYou can expect the same level of productivity from the HybridPC200LC-8 excavator as the conventional PC200LC-8excavator. Transportation dimensions, working forces,working range, and lift capacities are equal to theconventional PC200LC-8.Hybrid Excavator Energy FlowThe hybrid system drives the upper structure with an electricmotor. The electric motor is also used to regenerate energy asthe upper structure slows down. Fuel consumption is improvedby the ability to use the regenerated energy to assist duringhigh power demands allowing the engine to run at an optimumspeed for high efficiency.Komatsu Hybrid SystemInverterThe upper structure turningElectric motor toturn the upperstructureRecovers energy,when turning slowsdown in loadingoperation.Powers electric swingmotor.CapacitorEfficiently andinstantaneously storesand dischargeselectric energy.Generator MotorUtilizes electricitydischarged from thecapacitor when theengine accelerates.EngineElectric powerassistance at the time ofengine accelerationfor work equipmentoperation2
Ultra Capacitor for Energy StorageIn construction equipment, the energy demand is high andoccurs in a short amount of time. Combined with a highfrequency of demand, the electrical energy requirements tooperate construction equipment cannot be met with currentbattery technology.Hybrid ComponentsSwing Motor/GeneratorInstantaneousnessConstructionequipmentPower density(Frequent use of large power)Forklift trucksCapacitorsBatteriesCarsThe Hybrid PC200LC-8 uses an electric swing motor thatrotates the upper structure and recovers energy during swingbraking. A special housing, which circulates cooling water andlubricating oil, further enhances durability.Inverter (Converter) and Ultra CapacitorEnergy density (Longer use of small power)ContinuousnessThe “Komatsu Hybrid System” uses an “Ultra Capacitor” toinstantaneously store and give off electrical energy efficiently.This capacitor charges and discharges in a much faster methodthan the slower chemical reactions that take place in batteries.The high energy demand and frequent cycles needed by anexcavator are matched by the instantaneous charging and dischargingcharacteristics of a capacitor.The inverter receives AC energy and converts it to DC energyfrom two sources:1. Recovered energy from the swing motor/generator2. Charging power from the engine’s generator/motorThe converted DC energy from these two sources is quicklystored in the Ultra Capacitor. The stored DC energy is thenquickly released and converted to AC to power the swing motorand to assist the engine RPM. A special housing allows coolingwater to circulate further enhancing durability.Generator/MotorThe generator motor is built-in between the engine and hydraulicpump for effective power transmission to the hydraulic pumps.The generator can charge the capacitor during periods when nowork equipment or travel operations are used. The generatormotor also receives power from the capacitor for engine assist,as commanded by the Hybrid controller.3
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Hybrid

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