1

Operating Temperature

-10— +50(Typical value 25)

℃

2

Storage temperature

-40 — +85

℃

3

Relative humidity

≤95

%

4

Elevation

≤2000

m

5

Heat dissipation method

Conduction water cooling

-

Conductive water cooling, specifically achieved by attaching the aluminum heat sink plate at the bottom of the power supply to a platform equipped with water cooling measures. Water flow rate must be ≥15L/min, and inlet water temperature must be ≤25°C.

6

System Cooling Method

Conduction water cooling + system air cooling

-

Conductive water cooling is achieved by attaching the aluminum heat sink plate at the bottom of the power supply to a platform equipped with water cooling measures. Water flow rate must be ≥15L/min, and inlet water temperature must be ≤35°C.

Serial Number

Project

Technical Requirements

Unit

Note

1.1

Input Voltage Range

187—528

Vac

Three-phase AC (without neutral wire)

1.2

Rated Input Voltage

208—480

Vac

1.3

Input voltage frequency

47—63(Typical value: 50/60)

Hz

1.4

Power factor

≥0.96

-

Rated Input, Rated Load

1.5

Maximum Input Current

22

A

Rated load

1.6

Input surge current

＜30

A

Rated input, no-load

2. Output Characteristics

2.1

Output voltage setting

300±0.5

Vdc

Ambient temperature, rated input/half-load output

2.2

Output Voltage Range

50-400

Vdc

By applying an external 0-4.5V voltage regulation signal, the output voltage can be controlled from 50 to 400V.

2.3

Output Current Range

0-20

A

When the output voltage exceeds 300V, the rated output is 6kW.

2.4

Overall efficiency

≥92

%

Ambient temperature, rated input/rated output

2.5

Output ripple and noise

≤3000

mVp-p

The oscilloscope bandwidth should be 20 MHz, with probes connected in parallel with a 10μF capacitor and a 104Ω resistor.

2.6

Power-on/off overshoot amplitude

≤±5

%

2.7

Dynamic Characteristics

Loading

Output increases from 0 to full load within 10μs

/

The output voltage shall not experience a transient drop or overshoot exceeding 3%, and shall not cause abnormal operation or protection of the power supply.

Dump load

Output drops from full load to zero within 10μs.

/

Modulated output

Modulation frequency: 5 Hz to 10 kHz;

Duty cycle: 20% to 100%;

Output power settings: 50%, 80%, 100%;

Arrange and combine the above conditions to test scenarios under each output setting.

Full voltage range input, with no noticeable distortion or clipping in the output pulse waveform, and no abnormal operation or protection events occurring in the power supply.

2.8

Voltage Regulation Accuracy

≤±1.5

%

2.9

Source adjustment rate

≤±0.5

%

2.10

Load Regulation

≤±1

%

2.11

SW Power-On Delay Time

≤3

s

Time from SW signal transitioning from high to low level to output voltage stabilization (no-load start)

2.12

Power-on delay

≤10

s

Time required for voltage to build from input to output when SW signal is pulled low (no-load start)

2.13

Output rise time

≤700

ms

Output voltage increases from 10% to 90% at rated load

2.14

Shutdown delay

≤20

ms

After the power supply receives the SW shutdown signal from the control interface, it shall cease operation within 20 milliseconds.

2.15

Output capacitor discharge time

≤15

s

When the input voltage is disconnected, under no-load conditions, the voltage across the output storage capacitor shall decrease to below 50V within 15 seconds.

2.16

Capacitive load

1500

uF

Full voltage and full load range

2.17

Temperature coefficient

±0.02

%/℃

Rated output voltage and current, full operating temperature range

2.18

Current-sharing busbar voltage

3.9±0.2

V

Half-year, 10A load testing

2.19

Output and parallel operation current sharing ratio

≥5

%

Over six months of testing