LCD Smart Series
1000A AC to DC Power Supply – Reliable Solution from China Suppliers and Factory for Modern Energy Needs
In today’s high-tech landscape, AC-to-DC power supplies are essential components in modern electronic devices and energy systems. These systems effectively convert alternating current (AC) into stable direct current (DC), ensuring reliable power for various loads and facilitating charging applications in sectors like electric vehicles and energy storage systems. Whether in smart homes, industrial automation, medical devices, or new energy vehicles, AC-to-DC technology serves as a vital link between the power grid and end-user devices. As a leading supplier in China, our factory specializes in delivering innovative and efficient AC-to-DC solutions that enhance energy utilization and drive advancements across multiple industries
AC input: 260-500VAC
DC output: 50-750VDC
Output current: 1-1000A
Power: 400KW
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.
Technical Specifications
| 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％ |
Frequently Asked Questions
What is the primary function of an AC-to-DC power supply?
The primary function is to convert mains AC power (such as 380V/50Hz) into stable DC power required by connected equipment. This is achieved through a series of stages including input filtering, rectification, smoothing, and voltage regulation.
What input voltage range does this AC-to-DC power supply support?
The power supply supports an AC input voltage range of 320 Vac to 450 Vac, with a rated voltage of 380 Vac. It is compatible with both 50Hz and 60Hz rated frequencies and operates on a three-phase + PE input system.
What DC output voltage and current ranges are available?
The DC output voltage range is 50V to 750V, and the current range is 1A to 1000A. The rated current is 1000A at 400V output. At 750V output, the maximum current is 533A. These wide ranges make it suitable for diverse industrial applications.
What protections does this power supply provide?
This AC-to-DC power supply integrates an intelligent control chip offering comprehensive protection including overvoltage protection, overcurrent protection, short-circuit protection, and overheating protection. Input-side components such as varistors and fuses also provide surge and overcurrent protection.
What are the operating temperature and environmental conditions?
The unit operates within a temperature range of -40°C to +75°C, though derating is required above 55°C. It can be stored at temperatures between -40°C and +70°C. Relative humidity must be ≤95%RH (non-condensing), and it operates at altitudes up to 2,000 m a.s.l. with derating required above that level.
What efficiency and power factor can be expected from this power supply?
The power supply achieves an efficiency of ≥95.2% at 750V output under 50%–100% load conditions. The power factor reaches ≥0.99 at full-load nominal input, ≥0.98 at 50%–100% load, and ≥0.95 at 20%–50% load. Total Harmonic Distortion (THD) is ≤5% at 50%–100% full-load output.
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