在全球生态的剧烈变化和挑战下，如何共同营造人类社会与环境的和谐共生成了当代所有人都需要面对的命题。世界各国在近年陆续提出了各自的碳中和时间表，我国也率先做出2030年实现“碳达峰”，2060年实现“碳中和”的表率。推进双碳目标的实现，关键在于各行业的能源转型。承担着减排重任的汽车和工程机械行业，对其进行电气化改造，能够有效的在短期内“减碳”，助力绿色可持续发展的战略。
在政策扶持的大环境下，从最开始商用车新能源化，到后来的乘用车跟进，发展可谓十分迅猛。在此过程中，相关的新能源车用动力系统技术和产品也在不断成熟进步，成本逐渐下降，使得新能源车用电池、电机、电控核心部件的性价比不断提升。这一系列的变化，同时也促成了新能源动力总成技术在工程机械领域的应用和延伸。
总部位于美国伊利诺伊州的卡特彼勒公司（Caterpillar,CAT）成立于1925年，在近百年的发展历程中，卡特彼勒所积累下来的技术及产品优势，使其一举成为世界上最大的工程机械生产厂家。卡特彼勒在全球拥有众多子品牌，其中在我国运营SEM（山东山工机械）和CAT两大品牌，且在无锡和青岛设有研发中心，生产基地遍布上海、苏州、无锡、天津、山东等地，满足于不同类型工程产品的研发和生产。
2020年底，SEM率先在装载机上进行电气化改造，而另一边的CAT无锡研发中心技术小组提出了定制化产品的要求。我司凭借行业领先的技术和高质的出品，顺利地被技术小组所相中，不仅满足装载机功能需求，并在严苛的性能测试中，出色的完成并展现出强大的技术能力。
SEM装载机采用我司的M18和M04两款控制器产品，有着智能温控系统可确保机器运行过程不会出现过热停机情况，功率稳定散热良好。配备的三级漏电防护，保护程序全时段监测并自动介入，能够保证人员与机器的安全，减少故障率。装载机在泥沙灰土的恶劣使用环境中，两款控制器IP67等级的防护也能够让机器最大程度稳定运行，保障工程进度。
截至目前，SEM已进行了多次小批量的采购，整车也已交付下游客户使用。出于对我司产品的肯定，CAT无锡研发中心已经将控制器提交美国总部进行深度测试，有望在CAT品牌的工程机械应用上进行全球推广。
据了解，SEM新能源装载机将在今年批量生产，届时将能满足市场旺盛的需求和企业节能减碳的需求。我司作为卡特彼勒新能源装载机的唯一配套商，也为其推土机等工程机械提供高品质的电机控制器解决方案，以绿色为着力点，不断开拓新能源化的应用场景，提供更趋完善的产品。
A well-known bus manufacturer in China successfully secured an order of one hundred 18-meter hybrid electric buses recently from a Karachi company. GTAKE, as a premium supplier of electric vehicle (EV) motor controller, supplied integrated solutions of EV motor controllers for this batch of buses.
These buses, powered by GTAKE controllers, will be operated in Karachi, the largest city of Pakistan, which further adds GTAKE's global presence in the field of EV motor controllers.
Karachi, the economic center of Pakistan, is a metropolitan with a population of 20 million. With such a large population base, the issues of road congestion and citizen travel demand are becoming more and more prominent, and there is an urgent need to establish a comprehensive network for public transportation. Two BRT special lines, the orange line and the green line, came into being in Karachi under this circumstance.
BRT ( Bus Rapid Transit), as a new operating system, uses modern bus technology with intelligent traffic management, enabling the traditional bus transportation system basically to reach the level of service of rail transportation, while its investment and operating costs are lower than rail transit and close to conventional buses. With the previous in-depth survey, the customer decided to adopt hybrid system solution for the buses. Models G03 and G04 motor controllers are utilized in the system, according to the proposal presented by GTAKE. The core components of the two controllers are from leading companies, not only guaranteeing the performance,
but also providing quick dynamic response for the operation. GTAKE persists in providing high-quality products by virtue of optimal software system, as well as automotive grade components to ensure safe operation of the vehicle, and provide a comfortable bus travel experience for passengers.
Based on the terrain characteristics of Karachi, this batch of electric buses select to adopt lightweight solution. The controller developed by GTAKE has the advantage of high space utilization, playing a significant role in reducing the weight of the vehicle.
·G03 external dimensions: 488mm × 244mm × 110mm; weight: 13.5kg
·G04 external dimensions: 600mm × 300mm × 142.8mm; weight: 22kg
The GTAKE controllers are able to meet the climbing demand easily. Under the constant power mode, the output torque can be maintained to be stable and sufficient. Through an optimized torque control tactic, the vehicle can run on slopes smoothly and stop comfortably without sliding backward.
·G03 rated voltage: 540V; rated power: 132 kW; peak power: 198 kW
·G04 rated voltage: 540V; rated power: 200 kW; peak power: 300 kW
Energy saving and environmental protection are regarded as two important indexes for a hybrid electric vehicle. During low-speed or decelerating driving, the controller can automatically recognize the operating status of the vehicle, and shift to the mode of electric power supply for the vehicle in order to reduce exhaust emissions. The G03 controller is equipped with the mechanism of energy recycling. It stores regenerating energy dynamically, and monitors the battery capacity at all times, ensuring the vehicle is always in a balanced status and increase the mileage remarkably.
Bus, as a way of transportation to serve the public, is endowed with properties of frequent-use, and prone to go through complex city roads and weather conditions. The safety of the vehicle system, therefore, must be treated as the paramount criterion. The models G03 and G04 motor controllers in the bus are programmed with all-round protections, such as quick protection on short-circuit, overcurrent, overvoltage, over-temperature, overload, encoder disconnection, etc., also their IP grade meets the standard IP67.
These hybrid electric buses are expected to run in Karachi Orange & Green BRT pass in the near future, a beautiful landscape of the city. It will bring convenient travels to local citizens, and significantly contribute to the environmental protection as well. It is also believed it will provide reproducible experience to more cities in Pakistan to carry out the settlement of BRT.
