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1000A AC to DC Power Supply - Reliable Solutions from China Suppliers and Factories for Modern Electronics
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.
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.
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 circuits utilize components such as capacitors and inductors to smooth pulsating DC and reduce ripple.
Modern AC-to-DC power supplies integrate intelligent control chips to provide multiple protections against overvoltage, overcurrent, short circuits, and overheating.
| Category | Name | Parameter |
|---|---|---|
| Environmental Conditions | Operation temperature | -40°C ~ +75°C, derating is required when the temperature is above 55°C. |
| Storage temperature | -40°C ~ +70°C | |
| Relative humidity | ≤95%RH, without condensation | |
| Cooling mode | Forced air cooling | |
| Altitude | 2,000 m a.s.l., derating is required when the altitude is above 2,000 m a.s.l. | |
| Atmospheric pressure | 79 kPa ~ 106 kPa | |
| AC Input | Input system | Three phases + PE |
| Rated voltage | 380 Vac | |
| Voltage range | 320 Vac ~ 450 Vac | |
| Maximum current | 640A | |
| Rated frequency | 50Hz / 60Hz | |
| DC Output | Voltage range | 50 ~ 750V |
| Current range | 1 ~ 1000A | |
| Rated current | 1000A @400V (required for setting of current limiting point, 750V is 533A) | |
| Steady voltage precision | <±0.5% | |
| Steady current precision | ≤±1% (rated range of 20% ~ 100% for output load) | |
| Load regulation rate | ≤±0.5% | |
| Startup overshoot | ≤±3% | |
| Peak-to-peak value noise | ≤1% (50 ~ 750V, 0 ~ 20MHz) | |
| Power Factor & THD | Power factor | ≥0.95 Full-load output power @20% ~ 50% |
| ≥0.98 Full-load output power @50% ~ 100% | ||
| ≥0.99 Full-load output power, input nominal voltage and frequency @100% | ||
| THD | ≤5% Full-load output power @50% ~ 100% | |
| Efficiency | Under rated input voltage | ≥95.2％，@750V，50％ ~ 100％ |