LCD Smart Series
1000A AC to DC Power Supply – Reliable Solutions from China Suppliers and Factories for Modern Electronics
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AC-to-DC power supplies are essential components in modern electronic devices and energy systems, playing a vital role in converting alternating current (AC) into direct current (DC). These power supplies ensure reliable power for various DC loads and are particularly important for charging applications in sectors like electric vehicles and energy storage systems. As leading
suppliers
in
China
, our factory specializes in innovative AC-to-DC technology that serves a wide range of applications—from smart homes to industrial automation, and from medical equipment to new energy vehicles. Our products act as a crucial link between the power grid and end devices, facilitating advanced methods of energy utilization and supporting the growing demand for sustainable energy solutions.
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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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Key Functional Stages
Key Functional Stages
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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.
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Technical Specifications
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
Q
What is the primary function of an AC-to-DC power supply?
What is the primary function of an AC-to-DC power supply?
An AC-to-DC power supply converts mains alternating current (such as 380V/50Hz AC) into stable direct current required by connected equipment. This is achieved through a series of stages including input filtering, rectification, smoothing, and voltage regulation.
Q
What input voltage range does this AC-to-DC power supply support?
What input voltage range does this AC-to-DC power supply support?
The power supply supports a three-phase AC input voltage range of 320 Vac to 450 Vac, with a rated voltage of 380 Vac and a rated frequency of 50Hz or 60Hz.
Q
What DC output voltage and current can this unit provide?
What DC output voltage and current can this unit provide?
The DC output voltage range is 50V to 750V, and the output current range is 1A to 1000A. The rated current is 1000A at 400V output. At the maximum voltage of 750V, the current is limited to 533A.
Q
What protections are built into this AC-to-DC power supply?
What protections are built into this AC-to-DC power supply?
The unit integrates an intelligent control chip that provides comprehensive protection including overvoltage protection, overcurrent protection, short-circuit protection, and overheating protection. The input stage also includes varistors and fuses for surge and overcurrent protection.
Q
What is the efficiency rating of this power supply?
What is the efficiency rating of this power supply?
Under rated input voltage conditions, the power supply achieves an efficiency of ≥95.2% at 750V output with a load range of 50% to 100%. The power factor reaches ≥0.99 at full-load nominal input conditions, ensuring minimal energy waste.
Q
What are the operating environment requirements for this power supply?
What are the operating environment requirements for this power supply?
The unit operates within a temperature range of -40°C to +75°C (with derating above 55°C), at relative humidity of ≤95%RH (non-condensing), and at altitudes up to 2,000 m a.s.l. (with derating above 2,000 m). Cooling is provided by forced air circulation.
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