Feisi AI Server Power Testing SystemSuitable for various testing requirements of AI data center server power supply units such as PSU, integrated power cabinets Power Shelf/Power Rack, HVDC, backup battery units BBU, etc.

The system has over 40 testing projects, supporting input characteristic testing, output characteristic testing, stability testing, timing and instantaneous characteristic testing, protection characteristic testing, custom reports, data dashboards, one click testing, barcode scanning, single/multiple channels, and custom fixtures. It has built a testing platform that can cover all working conditions.

The system is based on Feisi's self-developed, self-produced, and independently branded high-speed high-power electronic loads, low-voltage high current electronic loads, high-speed medium power electronic loads, feedback loads, high-power bidirectional DC power supplies, and other measurement and control hardware and automation testing software systems. The core source load measurement and control equipment includes:

High power DC electronic load FT68200H high slope series

☑ Rated power: 0~144kW ☑ Can be connected in parallel to 1.44MW power ☑ Voltage range: 150V/600V/1200/1600V ☑ Dynamic frequency: 50kHz ☑ Slope 80A/μ S

Medium power DC electronic load FT63200H high slope series

☑ Power: 0-3kW ☑ Voltage: 150V/600V/1200V ☑ Dynamic frequency: 50kHz ☑ Dynamic slope of 40A/μ S

Ultra low voltage high current DC electronic load FT68200NZ/FT68200N series

☑ Low voltage operation characteristics 0.2V @ 5000A/0V @ 3000A

High power bidirectional DC power supply FTB9000 series

☑ Voltage: 0~2250V ☑ Power: 0~180kW ☑ Can be connected in parallel to a power of 1.8MW ☑ Feedback efficiency 93%

High power bidirectional DC power supply FTB7000 series

☑ Power: 0~300kW ☑ Can be connected in parallel to 3MW power ☑ Feedback efficiency 93%

DC power supply FTP1200/FTP/FTP9000/FTG series

☑ Power range: 0-180kW ☑ Can be connected in parallel to a power of 1.8MW ☑ Voltage range: 0~3600V ☑ Current level 0~120000A

FTM8000/FTM9000/FTM6000Electrical parameter testing board and instrument

☑ Acquisition and Control: Analog/Digital/Insulation Resistance/Temperature ☑ High voltage and high current: 2000V/3000A/0.005% ☑ Real time clock

Faith electronic loads have excellent dynamic performance and scalability, making them ideal for dynamic response testing and high-power parallel current sharing testing of AI server power supplies.

For example, the Feisi FT68200H high slope electronic load series supports multiple loads to synchronously apply step loads, simulating the instantaneous power consumption changes of GPU/CPU during actual server operation, and verifying the transient response of the corresponding server power supply. The Feisi FT68200H high slope electronic load supports a current slope of up to 80A/μ s, far exceeding the industry average, and can accurately reproduce the transient power consumption characteristics of the computing power center. In the high slope dynamic testing of AI server power supply in multiple well-known factories, the test waveform of Feisi Electronics' load lasted for 8 hours of stable simulated working conditions, which was recognized by customers.

The following are specific types of AI server power supplies and the applications of Feisi core source load testing equipment involved:

Server Power Supply Unit (PSU)/Rectifier Testing

The testing of Power Supply Units (PSUs) in data centers goes far beyond the testing scope of ordinary consumer products, and it is crucial for the stable operation of the entire data center.

According to the M-CRPS and OCP ORV3 testing guidelines, the Faith DC electronic load FT63200H high slope series can meet the requirements for testing PSU parameters and performance. Especially for testing PSU dynamic load testing, the high-speed dynamic characteristics of FT63200H electronic load simulate the sudden and drastic power consumption changes (transient response) during GPU computing, testing the stability of PSU output voltage to ensure that the system will not restart or crash due to voltage drops.

Faith provides a complete testing plan for server power supply PSU to simulate high-speed, large dynamic range current changes and other working conditions to meet PSU testing. The core source load configuration is shown in the figure.

Power Shelf/Power Rack Test for Server Power Integration

In data center and server architecture, Power Shelf refers to an integrated power unit that is typically installed in a rack and consists of multiple redundant power modules, distribution units, and management modules. In the OCP ORV3 standard, a Power Shelf can provide up to 33kW or even 72kW of power output in a space of 10U height.

The core functions of Power Shelf are:

① Centralized power supply and management to enhance power density.

② Support hot swapping and redundancy mechanism to ensure that the server does not power off

Faith provides testing solutions for Power Shelf that comply with the OCP ORV3 testing guidelines, effectively verifying its performance and reliability in practical applications, ensuring that it meets high standard operational requirements.

Power Rack refers to an integrated centralized power supply system that provides power to the entire server rack, typically consisting of multiple Power Shelves connected in parallel, with a power output of several hundred kilowatts.

Its core feature is the integration of power distribution units (PDU), battery backup cabinets (BBU Shelf), monitoring systems, etc., to achieve efficient power supply and management at the cabinet level. The power rack of the server power supply has high power and requires a complete evaluation of the laboratory setup requirements.

Feisi provides customized solutions, covering equipment parallel testing and evaluation, field equipment electricity and layout suggestions, air-cooled water cooling planning, environmental heat dissipation and heat flow analysis, etc. The core source carrier equipment is as follows:

Server power supply high voltage direct current HVDC test

HVDC server power supply is an important evolution of data center power supply technology. It greatly improves energy efficiency, reliability, and power density by adopting a high-voltage direct current power supply architecture. Due to the higher operating voltage, testing HVDC server power also brings new challenges:

1. The front-end PSU needs to handle input voltages up to 800V.

2. The rear stage PSU (such as converting 400V to 50V) still needs to provide a large current when outputting low voltage.

Faith is one of the few manufacturers in China that produces a full range of electronic load and programmable DC power testing instruments. Its wide range, high precision, and high stability meet the specifications and testing requirements of server power high-voltage DC products.

Especially for the FT68200 high-voltage electronic load, it still has sufficient current carrying capacity at a high voltage of 1200V to be suitable for power testing with a 50V output. In addition, the FTB9000 high-power bidirectional DC power supply has the load function of energy recovery, and its dual gear design is very suitable for high-voltage DC testing applications at 400V or 800V.

Faith provides a complete testing plan for HVDC testing, which simulates fast transient response, load step testing, fault simulation and other working conditions to meet the testing requirements of HVDC. The core source load configuration is shown in the figure.

Backup Battery Unit (BBU) testing

The BBU of the AI server is a highly integrated system that is not just a simple battery, but an emergency power supply system that integrates battery cells, intelligent management, power conversion, and communication functions.

Its core mission is to seamlessly provide DC power supply in the event of mains power failure. Due to the sudden fluctuations in load, this requires the backup battery to provide a huge discharge current (high rate discharge) in a short period of time and quickly absorb energy (high rate charging) after mains power is restored. The Feisi FTB9000 bidirectional power supply can simulate this working condition and easily build a backup battery unit testing plan.

Targeting 48V architecture and emerging high-voltage 400V/800V architecture. Feisi bidirectional programmable DC power supply can cope with BBU charging and discharging performance, BBU switching time transient response, and power grid simulation.

48VArchitecture testing plan:

BBU charging and discharging performance

As a load: Set the Feisi bidirectional power supply to operate in load mode, with constant power or constant current, and conduct discharge tests on the BBU to verify its capacity and discharge time.

As a power source: Set the Feisi bidirectional power supply to work in power mode, charge the BBU, test its charging acceptance ability and management strategy.

BBU switching time and transient response

As a power supply: Normal output of 48V, simulating the main power supply.

Instantly turn off the output using its sequence function or external trigger (simulating power outage)

Use an oscilloscope to detect the DC bus voltage and measure the delay time (usually<10ms) and voltage drop amplitude from power failure to BBU voltage establishment.

Power grid simulation

Simulate the fluctuation (such as 45V to 55V), ripple, or instantaneous drop of DC bus voltage using the list mode of bidirectional power supply, and test the operational stability of BBU under such harsh conditions.

High voltage 400V/800V architecture BBU testing plan:

BBU charging and discharging cycle

Energy recovery is crucial. Conducting a charge discharge cycle test on a 400V/10kW BBU, if energy is not recovered, will consume 20 kWh of electricity per hour, which is a huge cost. The regeneration function of bidirectional power supply can feed back most of the electrical energy to the grid. The Feisi FTB9000 bidirectional programmable DC power supply has an energy recovery efficiency of 93%, greatly saving costs.

BBU dynamic load and transient

The power consumption of AI servers, especially those with multiple GPUs, changes rapidly. Simulate kW/ms level load step using high-speed dynamic mode with bidirectional power supply, and test the transient response and stability of high-voltage architecture. This is particularly important for 800V systems, as higher voltage means lower current, but requires more stringent design requirements for the control loop. The Feisi FTB9000 bidirectional power supply has high operational accuracy and fast response speed, making it very suitable for testing the backup unit BBU of AI server power supply.