LCD Smart Series
1000A AC to DC Power Supply
The core function of an AC-to-DC power supply is to convert mains power (such as 380V/50Hz AC) into stable DC power required by equipment through processes including rectification, filtering, and voltage regulation.
Input Filtering and Protection: The AC power first passes through the input filter circuit to eliminate high-frequency noise and electromagnetic interference (EMI). Simultaneously, components such as varistors and fuses provide surge protection and overcurrent protection.
Rectifier Circuit: The rectifier stage converts alternating current into pulsating direct current. Bridge rectifier circuits have become the mainstream choice due to their high efficiency and low ripple. Using a bridge configuration formed by four diodes, both the positive and negative half-cycles of the AC input are converted into unidirectional current. Taking a 220V AC input as an example, the peak output voltage after bridge rectification is approximately 311V, requiring further processing to meet load requirements.
Filtering and Voltage Stabilization: Filtering circuits utilize components such as capacitors and inductors to smooth pulsating DC and reduce ripple.
Control and Protection: Modern AC-to-DC power supplies integrate intelligent control chips to provide multiple protections against overvoltage, overcurrent, short circuits, and overheating.
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Category |
Name |
Parameter |
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Environmental conditions |
Operation temperature |
-40°C ~ +75°C, derating is require when the temperature is above 55°C. |
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Storage temperature |
-40°C ~ +70°C |
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Relative humidity |
≤95%RH, without condensation |
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Cooling mode |
Forced air cooling |
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Altitude |
2,000 m a.s.l., derating is require when the altitude is above 2,000 m a.s.l. |
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Atmospheric pressure |
79 kPa ~ 106 kPa |
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AC input |
Input system |
Three phases + PE |
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Rated voltage |
380 Vac |
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Voltage range |
320 Vac ~ 450Vac |
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Maximum current |
640A |
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Rated frequency |
50Hz/60Hz |
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DC output |
Voltage range |
50~750V |
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Current range |
1~1000A |
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Rated current |
1000A@400V (required for setting of current limiting point,750V is 533A) |
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Steady voltage precision |
<±0.5% |
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Steady current precision |
≤±1% (rated range of 20% ~ 100% for output load) |
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Load regulation rate |
≤±0.5% |
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Startup overshoot |
≤±3% |
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Peak-to-peak value noise |
≤1% (50~750V, 0~20MHz) |
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Power factor and THD |
Power factor |
≥0.95 Full-load output power of @20%~50% |
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≥0.98 Full-load output power of @50%~100% |
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≥0.99 Full-load output power, input nominal voltage and frequency of @100% |
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THD |
≤5% Full-load output power of @50%~100% |
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Efficiency |
Under Rated input voltage |
≥95.2％，@750V，50％～100％ |