Whether it is AC or DC, there are pros and cons. This is why they are each equally suitable for specific electrical applications. In the specific use of long-distance electricity, AC power is better, and DC power is more suitable for providing electronic products in fixed locations, including homes and workplaces.
Technical Support & FAQ
Looking for technical details or application guidance for our products? Find quick answers to common questions about our power solutions below.
General
Typically, a label will be written on the surface of the device. The easiest way to tell if it's an AC-DC or DC-DC power source is to look at the Inputs section. When the input is AC, the device may be AC-DC or AC-AC. On the other hand, if both input and output parts are DC, the device is DC-DC.
In stark contrast, the current of AC oscillates, reversing its direction and varying in magnitude periodically. On the other hand, in DC power, electrons follow a linear path. AC is the prevalent form of electrical energy for household appliances, whereas devices such as batteries, solar cells, fuel cells, and alternators utilize DC electricity instead of AC.
Its evident that an AC power supply is designed to provide AC power, while a DC power supply is intended for delivering DC power.As previously discussed, the primary distinction between AC and DC power lies in the direction of electron flow. AC power, characterized by its alternating direction, propels electrons akin to waves. Conversely, DC power propels electrons in a straight line, unidirectional in nature.Due to its waveform-like movement, AC power possesses the capability to traverse longer distances compared to DC power. Preens AFV+ series of AC power supplies exhibit certain qualities that fulfill requirements, leveraging advanced PWM technology to furnish power with a Total Harmonic Distortion (THD) of less than 0.5% and a capacity of up to 2000kVA.Power plants can effortlessly generate substantial amounts of AC power and channel it through power lines, subsequently stepping down the voltage to an acceptable level upon reaching residential and commercial establishments.
1. EV, Battery, and Power Electronics Applications
- Electric vehicle (EV) testing
- Battery charge simulation and battery testing
- Power-electronics applications
2. Photovoltaic (PV) and Solar Array Simulation
- Photovoltaic (PV) testing
- Solar array (I-V curve) simulation for PV inverters
3. Industrial Protection and Component Testing
- Fuse testing
- Contactor testing
- Air-circuit breaker testing
- High-current auto-range industrial component testing
4. High-Power Power Conversion Devices
- IGBT module testing
- Industrial inverter testing
- Railway transportation power systems
- High-power power-conversion applications
AC Power Source
Preen AC power source family has the widest range above the industry for output power ranges from 0.5kW〜2000kW and output frequency from 15〜1000Hz. With advance PWM design technology to provide clean and clear sine wave, we also have low total harmonic distortion, high load regulation rate and fast transient response features.
For interface, our ac source have Ethernet,RS-232&RS-485,USB, GPIB and Analog Control to meet with various of remote control and industrial 4.0 automation testing requirements.
The main demanding application can be used at electric vehicles, PV inverter, communication, lighting, medical equipment, home appliances, air conditioning, public transportation, EMC labs, research and study….etc and provide multiple AC power source testing solutions.
- Wide range of output power 0.5kVA〜2000kVA
- Wide range of output voltage 0-310V( 400V or 600V opt.)
- Wide range of output frequency 15〜1000Hz
- Single phase or three phase for selection
- Advance PWM high frequency switching technology
- High power density design, light weight, small volume and space saving
- Fast transient response, high load regulation rate & low ripple
- Can output high inrush current and has high crest factor.
- Three phase independent voltage and phase angle adjustable.
- Programmable RAMP and STEP setting feature
- IEC61000-4-11 can simulate the disturbance for IEC-61000-4-11 pre-compliance test
- Can simulate multiple power line disturbance such as transient, dip and spike
- Over Current Fold Back function. When the load requiring current pass over rated current, it can still remain constant output current and continue to power up the load
- Overload capability 125% /600sec、150%/30sec、200%/10sec
- Complementary remote control, Preen Program
- Complete interface connection for Ethernet,RS-232&RS-485,USB,GPIB,Analog&PLC Remote
- Compile to CE certificate& RoHs
* The further characteristics for each series feature should base on description on catalog.
| Product Name | Image | Features | Output Power | Output Voltage | Output Frequency | THD | Load Regulation | Efficiency | Operational Temperature | IP Level | Overload Capacity | Crest Factor | Inrush Current | Response Time | DC Output Voltage | Input Power Factor | Input Voltage | Input Frequency | Remote Interface | Weight | Certification | Application | View |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| AFV-P Series High Performance Programmable AC Power Source |  | Programmable AC power source with DC output and precision measurement. | 600VA~5kVA | 0~310V | A: 5~2000Hz B: 15~1000Hz | ≤ 0.3-2% | ≦ 0.07% F.S. | ≧ 77%-80% at max. power | 0-40℃ | - | - | ≧ 3 | ≧ 4.5 times of max.output current (rms) | ≦ 300 μs | 0-210V / 0-420V | - | 98-132VAC/196-264VAC | 47~63Hz | Standard: RS232,RS485, Ethernet, USB, PLC Remote In&Out Option: GPIB, Analog | 16～61.5kg (35.3～135.6lbs) | CE & RoHS | EV, Home Appliance, Laboratory | More |
| AFV+ Series High Power Programmable AC Power Source |  | An upgraded high power programmable AC power source of AFV series, with improving THD and Load Regulation. | 10kVA~2000kVA | 0~310V | A: 45~500Hz B: 45~120Hz C: 300~840Hz | ≦ 0.5% | ≦ 0.5% | ≧85%-90% at max. power | 0℃-45℃ | - | - | ≧ 3 | - | ≦ 1ms | - | ≧ 0.9 at Max. Power | 380VAC±15% 200VAC, 208VAC, 240VAC, 400VAC | 47~63Hz | Standard: RS232, RS485, Ethernet Option: Interface Card(RS232&RS485, Ethernet,USB) GPIB, Analog | - | CE & RoHS | PV Inverter, EV, Industrial Power Supply, Renewable Energy | More |
| AFV Series High Power Programmable AC Power Source |  | High power programmable AC power source utilizing advanced PWM technology to deliver power. | 10kVA~2000kVA | 0~310V | ≦ 1% | ≦ 1% | ≧85%-90% at max. power | 0℃-45℃ | - | - | - | - | ≦ 2ms | - | ≧0.9 at max. power ≧0.85% at max. power | /380VAC±15% 208/220VAC,480VAC,(Optional) | 47~63Hz | Standard: RS232, RS485, Ethernet Option: Interface Card(RS232&RS485, Ethernet,USB),GPIB, Analog | - | CE & RoHS | PV Inverter, EV, Laboratory | More | |
| PAS/PFV Series Regenerative Grid Simulator |  | Regenerative high power AC power source, built in with Low Voltage Ride Through Test (LVRT) test function. | 30kVA~2000kVA | 0～300V 0-350V(opt) | 45~65Hz 40~70Hz (Opt.) | ≦ 2% | ≦ 1% | ≧ 92% at Max. Power | 0℃-45℃ | - | - | - | - | ≦ 2ms | - | ≧ 0.99 at Max. Power | 380VAC±15% | 47~63Hz | Standard: RS232, RS485, Option: Ethernet, GPIB, USB | - | CE & RoHS | PV Inverter, EV, Laboratory, Motor & Compressor | More |
| AFC Series AC Power Source / Frequency Converter |  | AC power source which can simulate standard or abnormal voltage and frequency status. | 10kVA~2000kVA | 0~310V | 45~65Hz, 100Hz/120Hz/200Hz/240Hz/400Hz (Opt.) | ≦ 2% | ≦ 1% | ≧85%-90% at max. power | 0℃-45℃ | - | - | - | - | ≦ 2ms | - | ≧0.85 ≧0.9 at max. power | - | - | Standard: RS232, RS485 | - | CE & RoHS | EV, Renewable Energy, IT/SMT Production Line | More |
| AMV/AMF Series 400Hz Power Supply / Ground Power Unit |  | Ground power unit which is compliant with MIL-STD-704F. | AMV: 30kVA~180kVA AMF: 500VA~400kVA | 115/200V ±10% | AMV: 300~500Hz(Stand Alone) 400Hz(Fixed) AMF: 350~450Hz 400Hz (Fixed) | AMV: ≦ 2% AMF: ≦ 0.5-3% | AMV: ≦ 1% AMF: ≦ 0.5-1.5% | AMV: ≧ 92% at Max. Power AMF: ≧ 87% at Max. Power | AMV: -40℃-55℃ AMF: -20℃-45℃ | AMV: IP54 | AMV: 125%/600s, 150%/30s, 200%/10s, (Optional) 150%/60s, 200%/30s, 250%/10s, 300%/1s AMF: 120%/1 hr, 150%/60s, 200%/15s | - | - | - | - | AMV: ≧94%at max. power AMF: ≧85% at max. power | - | - | AMV: RS-485 AMF: RS-485 (opt.) | - | CE & RoHS | - | More |
DC Power Supply
Preen ADG series family is a programmable DC power supply, including ADG-P series and newly launched ADGL series that has optional solar array and IV curve simulation function. The power for single unit ranges from small and medium 4kW to high power such as 100kW. That can support both serial and parallel. ADG series also has 300kW~1200kW as selection and has 16 different types of output voltage ranges that can deliver up to 2000V and 2500A.
With touch screen panel, complementary remote software program and built-in programmable functions. It can greatly reduce the difficulty to perform. Its high power and high accuracy feature is suitable for renewable energy, electric vehicle, DC/DC converter, PV inverter, battery, electronics to test for its functionality and life cycle.
- Wide range of output power 2kW〜1200kW
- Wide range of output voltage 0-2000V
- Advance PWM technology
- Mode : CV/CC/CP
- Fast transient response, high load regulation rate & low ripple
- Programmable RAMP and STEP setting feature
- Patented module design. Small volume, high power density and easy to maintain.
- Can simulate multiple power line disturbance such as transient, dip and spike
- Emergency stop bottom that compile with research labs and other testing requirements.
- Complementary remote control, Preen Program
- Solar array simulation features to simulate IV curve ( built-in EN50530 )
- Complete interface connection for Ethernet, RS-232 & RS-485, USB, GPIB, Analog & PLC Remote
- Compile to CE certificate & RoHs
* The further characteristics for each series feature should base on description on catalog.
| Product Name | Image | Features | Output Power | DC Output Voltage | DC Output Current | Output Ripple | Load Regulation | Line Regulation | Response Time | Efficiency | Line Drop Compensation | Transient Response Time | Input Power Factor | Remote Interface | Certification | Application | View |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| ADG-L Series Programmable DC Power Supply |  | Programmable DC power supply with three different output power, 5kW, 10kW and 15kW. Utilizing PWM technology. | 5kW～75kW | 0~2000V | 0~675A | down to < 0.05% | ≦ 0.3% | ≦ 0.08% | ≦ 5ms | ≧ 84-90% at Max. Power | - | - | 0.99 at Max. Power | Standard: RS-232, RS-485, Ethernet, USB, Analog Option: GPIB | CE & RoHS | PV Inverter, EV, Renewable Energy, Motor & Compressor | More |
| ADG+ Series High Power Programmable DC Power Supply |  | An upgraded high power DC power supply of ADG series, ADG+ series can simulate solar array with the optional I-V curve function. | 30kW～1800kW | 0~2000V | 0~2500A | down to < 0.05% | ≦ 0.3% | ≦ 0.05% | Down to ≤ 6ms | ≧ 84-90% at Max. Power | - | - | ≥ 90% at Max. Power | Standard: RS232, RS485, Analog, Ethernet, USB Option: GPIB | CE & RoHS | PV Inverter, EV, Renewable Energy | More |
| ADC Series Rack Mount DC Power Supply |  | DC power supply which has high power density, high accuracy and wellaround protection.Widely adopted in production lines, burn-in tests, laboratories and integrated systems. | 2kW～8kW | 0~600V | 0~68A | < 0.15% | < 0.05% | < 0.5% | - | ≧ 85-89% at Max. Power | 0～3V | < 1ms | - | - | CE EMC & LVD standard | EV, Industrial Power Supply | More |
- ADG-L Series : Best for medium power R&D and laboratory testing.
- ADG+ Series : Designed for high power applications such as EV testing and renewable energy simulation.
- ADC Series : Compact and efficient, perfect for production lines and system integration.
Our programmable DC power supplies support SCPI commands and are fully compatible with automation software such as LabVIEW and MATLAB. With flexible remote interfaces (USB, Ethernet, RS-232/RS-485, optional GPIB), integration into automated test systems becomes simple and efficient.
DC power supply, so called bench power supply, is a type of device that exclusively and constantly creates and supplies a Direct Current (DC).
The constant voltage of DC power is preferable to some devices, such as notebook computers, because the electronic devices need constant, continuous power. The instabilities of Alternating Current (AC) could damage the components of electronic devices.Therefore, engineers and technicians are inclined to use DC power supplies to set and supply specific voltages to power the device to confirm it’s working as intended.
Connect the DC power supply via leads inserted into the DC power supply panel to a device that is being tested, then use the display of the panel to set the rated voltage (constant voltage mode, CV) and rated current (constant current mode, CC) levels while engineers and technicians testing the device.
DC power supplies can switch the voltage and convert it into DC power. The majority of DC power supplies possess two modes of operation, Constant Voltage (CV) mode and Constant Current (CC) mode. In CV mode, the output voltage of the power supply differs according to the user settings and maintains the rated value. In CC mode, the current was regulated by power supply.
- Whether the output voltage, current and power fits your requirement
- The accuracy, ripple, noise,ce and setting resolution of DC power supplies
- The programmability and features of the DC power supply
Future expansion possibilities
- If the device is equipped with other advanced features fulfilling your need, such as PV simulation function
The DC power supplies we provide can be set to output from 115V to 1600V.
In terms of power supply, the three components of transformer, rectifier and filter are primary and necessary. First, to meet the voltage required to power up the load, the AC voltage is stepped down through a transformer. Second, the rectifier converts the sinusoidal AC waveform into a set of DC currents.
Sometimes you will need DC-DC power if the device starts with DC power. Unlike AC , DC cannot use a transformer to change from one voltage to another (whether boost or step down). Hence, DC-DC power supplies came into being to solve this problem. It can produce stable output voltages for electrical and electronic applications. First, a DC-DC power supply usually includes an inverter and a rectifier that converts DC to AC, so the AC can go into a transformer to change the voltage. After the power supply has produced the proper voltage, the power needs to be converted back to DC through a rectifier so that you can use your device smoothly. To produce clean power in the output, DC-DC power supplies need voltage regulators to smooth out the signal. You can consider whether your device needs perfectly clean power. Hence, we strongly recommend that you use regulated DC-DC power supplies for precision equipment.
Programmable DC power supplies allow precise control and automation, unlike traditional fixed-output supplies.
Supported by SCPI commands and interfaces (USB, Ethernet, RS-232/RS-485, optional GPIB).
Advanced models such as ADG+ feature I-V curve simulation for solar array emulation.
Units can be connected in parallel with simple configuration to achieve up to megawatt-level power output.
All Preen programmable DC power supplies include built-in protection:
- Over-voltage (OVP)
- Over-current (OCP)
- Short circuit (SCP)
- Over-temperature (OTP)
These features ensure reliable and safe operation under demanding test conditions.