According to foreign media reports, US Army researchers said that an energy-saving generator used in private residences can power self-driving military vehicles for several months.

(Source: Army Research Laboratory, US Army Combat Capability Development Command)

A team of scientists and engineers at the US Army Combat Capabilities Development Command's Army Research Laboratory is working to accelerate the modernization of the Army. The test was part of a study started by the laboratory about two years ago to support the Energy Department’s advanced research project agency, the Energy Program, to evaluate the Stirling cycle generator. This generator is known for its high efficiency, almost silent, long life and low emissions.

Researchers are also exploring the performance of various fuels. In addition to fossil fuels, they are also developing new technologies to efficiently convert biomass such as wood into electricity.

The project and Justin Shumaker, the principal investigator of the laboratory, said that this was the first time Stirling generators of this size were used to propel self-driving ground vehicles, which was a difficult task for generators because of the initial The design is only used to generate electricity and provide energy for the family.

In order for the Stirling engine to run, there needs to be a temperature difference between the hot end and the cold end. The cooling cycle brings heat from the cold end to keep it cool. The researchers designed and built several new technologies that will allow the generator to be used for propulsion. First developed a DC-DC power inverter, which can efficiently convert the power of the Stirling generator set to the vehicle power bus.

The researchers also modified a large all-terrain unmanned ground vehicle-Clearpath Robotics warthog (which can travel on land and water), retaining only the original chassis and wheels.

The team then designed a new battery using a lithium-titanate battery and a battery management system, which ensures that the battery can be used safely. Shumaker said they also designed a cooling cycle for the new device.

Shumaker said: "All of this must be done in a way that is well integrated with the vehicle, it must be reliable, and there is enough space to operate in very hot weather conditions, and the pump and fan The power consumption is very small." To integrate the Stirling generator set into a hybrid car to power it, many mechanical, electrical and software components are required. (Yu Qiuyun)

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