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1000A AC to DC Power Supply - Reliable Solution from China Suppliers and Factory for Modern Energy Needs
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.
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🔌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.
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⚡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.
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🔧Filtering and Voltage Stabilization
Filtering circuits utilize components such as capacitors and inductors to smooth pulsating DC and reduce ripple.
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🛡️Control and Protection
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％ |