SiC New Opportunity! Mercedes actually uses it here
Recently, silicon carbide has opened up a new application scenario in the automotive market - electric force extractor (ePTO), which can be widely used in trucks, commercial vehicles, construction machinery, agricultural machinery and construction equipment markets.
Why use silicon carbide for electric force extractor? Which car companies have adopted it? How big is the future market space of electric power extractor?
Silicon carbide into the electric force extractor Mercedes-Benz, Hydro Leduc, etc., has been adopted
As we all know, new energy vehicles are the largest application direction of silicon carbide semiconductors, application scenarios include main drive electronic control, OBC/DC-DC, air conditioning compressors, fuel vehicle air compressors, PTC, relays, etc., and vehicle application scenarios are still expanding.
Silicon carbide has been used in electric force take-up (ePTO) by many automotive companies.
According to an October 7 press release from CISSOID, their SiC motor control module is being used by hydraulic component manufacturer Hydro Leduc's modular ePTO, which will be used to drive the hydraulic systems of new energy trucks and other off-road vehicles.
Hydro Leduc's new ePTO uses a 76 kW brushless motor, the ME230, and a 9-piston XRe series spherical piston hydraulic pump. The motor controller uses CISSOID's three-phase 1200V/340-550A silicon carbide power module. Suitable for applications up to 650 Vdc.
This silicon carbon-based ePTO is a high-performance, efficient electro-hydraulic solution with advantages including low noise, high efficiency, low pulsation and fast speed in self-priming mode.
In fact, as early as May 2022, ZF joined forces with Mercedes-Benz Trucks to provide the latter's electric trucks with a silicon carbon-based electric power harvester system, eWorX.
Zf's eWorX system is equipped with a 50 kW rated electric motor, inverter and control unit with dedicated software, as well as a cooling system and hydraulic pump.
Working principle driving force and market space analysis of electric power harvester
POWER TAKE-OFF (PTO) is an important part of trucks, commercial vehicles, motorhomes, construction machinery, agricultural machinery and construction machinery, mainly used to drive the hydraulic system and other auxiliary functions of special equipment such as cranes, garbage trucks and concrete mixers.
Currently, more than 70% of Ptos on the market are powered by internal combustion engines. Take the hydraulic excavator as an example, its operation process is to drive the hydraulic pump through the engine, the hydraulic pump will produce high pressure fluid, and then drive the hydraulic cylinder, so that the relevant executive device to work.
Schematic diagram of internal combustion engine force extractor
As we all know, traditional trucks, non-road mobile equipment (engineering construction machinery, agricultural machinery, forestry machinery, industrial vehicles, etc.) have large fuel consumption, environmental pollution and other problems, the Ministry of Transport, the Ministry of ecological Environment and other countries around the world have introduced strict regulations to promote the electrification of these vehicles and machinery transformation. To meet the requirements of energy conservation, emission reduction and green development.
This also makes the force takeer will also shift from the internal combustion engine drive mode to electrification, and the use of battery-driven electric force takeer (ePTO) will become the mainstream.
At present, there are two electric power extractor (ePTO) schemes on the market: pure electric and hybrid, the difference is that the former is an external charging pile to charge the battery, the latter is to charge the battery through the internal combustion engine power generation, the main principle is through the inverter to convert the battery's direct current into alternating current, so as to drive the ePTO, so that the hydraulic system to work.
The advantages of ePTO are that it is in line with the trend of environmental protection and electrification, energy efficiency, quieter and more flexible design.
According to the analysis of Professor Xu Bing of Zhejiang University in 2022, the current non-road mobile machine is only a simple replacement of the electric drive system for the internal combustion engine, and the hydraulic components and systems have not changed, and the technical advantages of the motor have not been fully utilized, in the era of electrization, the hydraulic system configuration of non-road mobile machines will have many innovations and changes.
With the evolution of electric technology for special vehicles such as sanitation trucks, dump trucks, public security fire trucks, building materials mixing trucks, and hazardous chemicals trucks, ePTO will be a new blue ocean market in the future. According to Leandro Girardi, vice president of aftermarket for Eaton North America, the future growth rate for electric special purpose vehicles is 35 to 50 percent per year. Bosch believes that between 2023 and 2025, the penetration rate of electric construction machinery vehicles will be around 25%.
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Silicon carbide (SiC), also known as carborundum, is a semiconductor containing silicon and carbon with chemical formula SiC. SiC is used in semiconductor electronics devices that operate at high temperatures or high voltages, or both.SiC is also one of the important LED components, it is a popular substrate for growing GaN devices, and it also serves as a heat spreader in high-power LEDs.