NGM200 DC power supply is an advanced equipment with a double elephants-limit architecture. Its unique design enables it to work in a way of simulating batteries and loads at the source and absorption terminals. This article will introduce the double elephants limit architecture principle of NGM200 DC power supply and its application in battery simulation and load simulation. I. Principle of double elephants limit architecture NGM200 DC power supply adopts double elephants limit architecture, that is, the output of the power supply can provide current to the load or absorb current from the load. This design of bidirectional current flow enables NGM200 to simulate the working state of battery and load, and realize more flexible power control and simulation. Source-side analog battery: When the NGM200 DC power supply is in the working state of the source-side analog battery, it can provide stable current output, providing power for the load just like a battery. In this mode, NGM200 can simulate different types of batteries, such as lithium batteries and lead-acid batteries, providing corresponding voltage and current outputs for the load. Simulated load at the absorption end: under the working state of the simulated load at the absorption end, NGM200 can absorb the current from the load and realize the simulation of the load. In this mode, NGM200 can simulate different types of load characteristics, such as resistive load and inductive load, and provide corresponding current absorption and feedback for the load. II. Battery simulation and load simulation application battery simulation: the source end simulation battery function of NGM200 DC power supply can be applied to the fields of battery management system testing, charging and discharging performance evaluation and battery protection device verification. By simulating the working status of different types of batteries, NGM200 can provide real and reliable power supply simulation for related devices to help users test and analyze the battery performance. Load simulation: the load simulation function at the absorption end of NGM200 DC power supply can be used in the research and development test of electronic equipment, performance evaluation of power supply and system stability verification. By simulating different types of load characteristics, NGM200 can provide accurate load simulation for related devices, helping users to test device performance and verify stability. III. Conclusion NGM200 DC power supply has shown great application potential in the fields of battery simulation and load simulation with its double elephants-limited architecture. The flexibility and accuracy of the source-side analog battery and the absorption-side analog load provide users with a more comprehensive power supply simulation solution, helping the application progress in the fields of electronic equipment research and development and battery performance testing.