800Vsystem
The biggest challenge in the promotion of electric drive systems for NEVs has been long charging. In the current trend of integrated and high-voltage electric drive systems, the 800V high-voltage platform is launched to improve vehicle-end charging efficiency and realize rapid vehicle energy replenishment. The use of SiC MOS can reduce losses of the 800V inverter and increase vehicle battery endurance by about 5%.OSWELL’s latest-generation three-in-one 800V system platform comprises an 800V SiC inverter and an 800V motor, and improves product performance dramatically while reducing the product size significantly with lower losses, higher temperature resistance, higher switching frequency, higher power density, and broader efficiency range, thereby meeting higher customer needs.
Oil cooling
Spray oil cooling is a cutting-edge cooling mode today, featuring high heat dissipation efficiency and direct contact with the motor’s internal heating components. However, the complex oil circuit system design and process have restricted its development. Due to its prominent advantages, many manufacturers and research institutions are studying this cooling mode to compete for technological leadership. OSWELL has conducted relevant research on end spray oil technology and applied it to production. By adjusting the flow distribution between different positions of oil injectors, the corresponding flow rate distribution maximizes cooling efficiency. The exterior design of the oil injectors, the seepage path, and the path and mode of fluid seepage through the winding end and iron core after injection are optimized to improve the heat dissipation efficiency and the motor’s power density.
Flat wires
Flat wires are good for improving the slot filling rate of the motor. Provided that the space remains unchanged, more copper wires are filled, higher magnetic field strength is generated, power density and thermal conductivity are improved, and the temperature rise is lowered. The OSWELL flat wire motor is connected by laser welding using the hairpin method, which has the following advantages: Flat wires are good for improving the slot filling rate of the motor. Provided that the space remains unchanged, more copper wires are filled, higher magnetic field strength is generated, power density and thermal conductivity are improved, and the temperature rise is lowered. The OSWELL flat wire motor is connected by laser welding using the hairpin method, which has the following advantages: 1. With the same power, the volume is smaller, material consumption is less and costs are lower; or with the same volume, the slot filling rate and power density are increased; 2. The temperature performance is better, there are less internal voids, and contact areas of flat wires with flat wires, windings and iron core slots are larger, thereby improving heat dissipation and conduction; 3. Electromagnetic noise is lower. For a improved armature rigidity to suppress the armature noise, a relatively small slot size is available, reducing the slot torque effectively and further reducing the electromagnetic noise of the motor; 4. The end is shorter, saving copper material and improving efficiency.
Oil cooling and parallel single tube three-in-one system
NEV electric drive systems are becoming highly integrated in the form of a “three-in-one motor + electric control + reducer system, plus an oil cooling system for the parking system (oil pump, oil cooler and drive)”.The performance, efficiency, noise, weight, reliability, etc. of an electric drive system are related directly to overall vehicle experiences. Integrated design and production capabilities will be an important development direction for Chinese electric drive system manufacturers. The OSWELL three-in-one electric drive assembly is highly integrated and lightweight, and employs advanced technologies such as flat wire motor, oil injection cooling, and two-shaft three-bearing structure. Our latest parallel single tube technology is used, making it possible to derive products that meet different customer needs on the same platform by adjusting the number of parallel IGBT single tubes, and changing the motor parameters and the speed ratio of the reducer, thereby maximizing the performance and cost of the oil cooling and parallel single tube three-in-one product.
Discipline simulation capability
Autosar+Functional safety
