AC Variable Frequency Power Supply
IGBT-based AC power supply for 50Hz, 60Hz and 400Hz frequency conversion
Rated Capacity:0.5–1800 kVA
Input Voltage:Configurable for Global AC Systems
Input Frequency:40–79 Hz
Output Voltage:3-Phase 0–520 V / 1-Phase 0–300 V Adjustable
Output Frequency:40–73 Hz Adjustable / 50, 60 & 400 Hz Fixed
Custom configurations: Other input/output voltages, 100/200 Hz fixed output, and customized frequency ranges from 5–1000 Hz are available on request.
AC Static Frequency Converter Power Supply Overview
WVFP series is an AC static frequency converter power supply based on AC-DC-AC power conversion technology. It converts an available AC supply into a stable AC output at the voltage and frequency required by the connected equipment.
WVFP is a static AC power source, not a motor speed controller or a variable frequency drive (VFD). Instead of regulating the speed of a motor, it provides a complete AC power source for connected equipment, with output voltage and output frequency selected to match that equipment.
Output voltage and output frequency are configurable:
- Output voltage: three-phase up to 520Vac, single-phase up to 300Vac
- Output frequency: adjustable, with fixed 50Hz / 60Hz / 400Hz settings for dedicated applications
Typical uses include matching different national grid standards, power compatibility for exported equipment, production line and laboratory power testing, and special-frequency applications.
Application Examples: Voltage & Frequency Conversion and Equipment Testing
WVFP provides configurable AC power with adjustable voltage and frequency output for export equipment testing, export equipment power adaptation, and 400Hz aircraft ground power applications.
Export Equipment Testing for Global Grid
WVFP provides adjustable voltage and frequency output for export equipment testing. Installed in a 380V/50Hz industrial power environment, the system can simulate different overseas grid conditions, such as 208V/60Hz, for equipment verification before shipment.
Export Equipment Power Supply Adaptation
WVFP converts different grid conditions for exported equipment. For PVD vacuum coating equipment shipped to the USA, it adapts 480V/60Hz power supply to 380V/50Hz required for stable operation.
400Hz Aircraft Ground Power Application
WVFP provides 400Hz AC power output for aircraft ground power applications, supporting aircraft maintenance, ground operation and aviation equipment requirements.
More Frequency Conversion Solutions
Explore more WVFP applications for voltage conversion, frequency conversion and equipment power compatibility.
Working principle
WVFP series variable frequency power supply adopts AC-DC-AC conversion technology. The input AC power is converted into DC voltage through rectification, then converted back to a stable AC output through an IGBT inverter system. This architecture enables independent adjustment of output voltage and frequency for different equipment power requirements.
AC-DC-AC Conversion Process
The AC-DC-AC conversion structure consists of rectification, DC bus, IGBT inverter and output filtering stages to provide stable voltage and frequency conversion.
Control System and Protection
The control system integrates voltage, current and protection feedback functions to maintain stable output performance under different operating conditions.
List Of WVFP Technical Parameters
Input Specifications
| Parameter | Specification |
|---|---|
| Rated Voltage(Vac) | Three Phase 200V,208V,220V,380V,400V,440V,480V(Any voltage can be customized)Single phase 110V,220V,230V,380V(Any voltage can be customized) Three phase three wire (L1, L2, L3) + Ground(PE).Single phase two line (L, N) + Ground(PE).The system can use a Neutral line or not.Any line entry method can be customized |
| Input Voltage Range(%) | (Rated Voltage)±15%.e.g.380V±15%(Customizable other voltage input ranges) Generally, the input voltage range can be ±15%,20%,30%,40% of the rated voltage. |
| Input Frequency(Hz) | Default 40~79Hz Other frequencies can be customized |
Output & Regulation Performance
| Parameter | Specification |
|---|---|
| Inverter modulation mode | IGBT Drive/SPWM(Sinusoidal Pulse Width Modulation) |
| Output voltage(Vac) | Default:Three phase 0-520V voltage adjustable, Single-phase 0-300V voltage adjustable (Other voltages can be customized e.g.690V,800V,1000V,3000V,3300V…) |
| Output voltage stability (average accuracy) | ±1%（Higher output accuracy can be customized） |
| Dynamic Response time | ＜2ms(Relative AC input voltage) |
| Output Voltage Waveform Distortion Rate | ＜2%(Linear load) |
| Output Frequency | 40Hz-73Hz adjustable, 50/60/400Hz fixed (100Hz/200Hz optional, 5-1000Hz customizable) |
| Frequency Stability | ＜0.1% |
| Phase offset | When the load is three-phase balanced or no-load: ≤±1°; when the load is 100% three-phase unbalanced: ≤±4° |
| Three-phase imbalance | Three-phase voltage automatic control balance |
Control & Communication
| Parameter | Specification |
|---|---|
| Control Mode | Full digital control The analog part is used for input and output signal conditioning |
| Main control unit | The main chip uses DSP(TI28XX) for control and measurement Some models use ARM master control with DSP function |
| Control strategy | SPWM(Sinusoidal Pulse Width Modulation) |
| Switching Frequency | 4~16K(According to different power) |
| Voltage and current measurement methods | True RMS sampling (three-phase synchronization) RMS & FFT sampling 256 points |
| Voltage & Current & Frequency Control Strategy | PID double closed loop control |
| Communication interface | RS485/232/MODBUS-RTU Protocol Optional TCP/IP, GPRS and other interfaces |
Display & Monitoring
| Parameter | Specification |
|---|---|
| Display Media | Industrial touch screen(7″or 10″) Other sizes of LCD can also be customized |
| Display electrical parameters | Input three-phase voltage and frequency; Output three-phase line voltage and frequency; Output line voltage average value; Output power factor;Output three-phase current; Output active power and apparent power; Heat sink temperature |
| Display alarm information | Input overvoltage (OV), overcurrent (OC); input undervoltage (UV); IGBT failure; heat sink overheat; transformer overheat; and other fault information |
| Display accuracy | The accuracy is Class 0.5s |
| Voltage display resolution | 0.1V |
| Current display resolution | 0.1A |
Protection
| Parameter | Specification |
|---|---|
| Protection List | Input overvoltage (OV), overcurrent (OC); input undervoltage (UV); IGBT failure; heat sink overheat; transformer overheat; and Short Circuit. |
| Protection Action | Cut off output and alarm Fault dry contacts can be configured(NC&NO) |
Other special requirements can be communicated with winzele
Recommended Applications
Export Equipment Testing
Simulating different voltage and frequency conditions for exported equipment verification before shipment.
Industrial Equipment Power Supply
Providing stable AC power with adjustable voltage and frequency for equipment commissioning and operation.
Laboratory Equipment Testing
Supporting voltage and frequency verification for electrical products, components and testing systems.
Aviation Ground Power
Providing 400Hz AC power output for aircraft ground support and aviation equipment applications.
List of WVFP Power Models & Products
1.Three-phase Model List
Small Capacity (3-30 kVA)
| Type | Capacity (kVA) |
Output Current(A) | Dimension W×D×H(mm) |
|
| High Volt |
Low Volt |
|||
| WVFP13003 WVFP33003 |
3 | 4.2 | 8.4 | 350×650×670 (Locking Castor Wheel) |
| WVFP13006 WVFP33006 |
6 | 8.4 | 16.8 | |
| WVFP13010 WVFP33010 |
10 | 15 | 30 | |
| WVFP13015 WVFP33015 |
15 | 23 | 46 | 460×700×1170 (Locking Castor Wheel) |
| WVFP13020 WVFP33020 |
20 | 30 | 60 | |
| WVFP33030 | 30 | 45 | 90 | |
Medium Capacity (45-200 kVA)
| Type | Capacity (kVA) |
Output Current(A) | Dimension W×D×H(mm) |
|
| High Volt |
Low Volt |
|||
| WVFP33045 | 45 | 68 | 136 | 780×650×1450 |
| WVFP33060 | 60 | 91 | 182 | |
| WVFP33075 | 75 | 114 | 228 | 950×700×1600 |
| WVFP33090 | 90 | 137 | 274 | |
| WVFP33120 | 120 | 183 | 366 | |
| WVFP33150 | 150 | 228 | 456 | 1200×750×1800 |
| WVFP33200 | 200 | 304 | 608 | |
Large Capacity (250-800 kVA)
| Type | Capacity (kVA) |
Output Current(A) | Dimension W×D×H(mm) |
|
| High Volt |
Low Volt |
|||
| WVFP33250 | 250 | 380 | 760 | 1400×800×2000 |
| WVFP33300 | 300 | 456 | 912 | |
| WVFP33350 | 350 | 532 | 1064 | 1500×1050×2000 |
| WVFP33400 | 400 | 608 | 1216 | |
| WVFP33500 | 500 | 760 | 1520 | 1500×1050×2000 |
| WVFP33600 | 600 | 912 | 1824 | |
| WVFP33800 | 800 | 1216 | 2432 | |
Extra-Large Capacity (1000-1800 kVA)
| Type | Capacity (kVA) |
Output Current(A) | Dimension W×D×H(mm) |
|
| High Volt |
Low Volt |
|||
| WVFP331000 | 1000 | 1520 | 3040 | 1500×1050×2000 |
| WVFP331200 | 1200 | 1823 | 3646 | |
| WVFP331400 | 1400 | 2127 | 4254 | 1500×1050×2000 |
| WVFP331600 | 1600 | 2431 | 4862 | |
| WVFP331800 | 1800 | 2735 | 5470 | 1500×1050×2000 |
Notice:
1. For 90kVA and below, use high and low voltage switch. For 90kVA and above, choose one of the high and low voltage when ordering;
2. The current in the table is calculated when the line voltage is 380V. The actual use should be calculated according to the highest voltage of the selected equipment;
2.Single-phase Model List
Small Capacity (0.5-30 kVA)
| Type | Rated capacity（kVA） | Output Current(A) | Dimension W×D×H(mm) | |
| High Volt | Low Volt | |||
| VFP11-500W | 0.5 | 2.1 | 4.2 | 425×436×173 |
| WVFP11001 | 1 | 4.2 | 8.4 | |
| WVFP11002 | 2 | 8.5 | 17 | 350×650×670 (Locking Castor Wheel) |
| WVFP11003 | 3 | 13 | 26 | |
| WVFP11005 | 5 | 21 | 42 | |
| WVFP11010 WVFP31010 |
10 | 42 | 84 | |
| WVFP11015 WVFP31015 |
15 | 63 | 126 | 460×700×1170 (Locking Castor Wheel) |
| WVFP11020 WVFP31020 |
20 | 84 | 168 | |
| WVFP11030 WVFP31030 |
30 | 126 | 252 | |
Medium Capacity (45-300 kVA)
| Type | Rated capacity（kVA） | Output Current(A) | Dimension W×D×H(mm) | |
| High Volt | Low Volt | |||
| WVFP11045 WVFP31045 |
45 | 189 | 378 | 780×650×1450 |
| WVFP31060 | 60 | 252 | 504 | |
| WVFP31075 | 75 | 315 | 630 | 950*700*1600 |
| WVFP31090 | 90 | 378 | 756 | |
| WVFP31120 | 120 | 504 | 1008 | 1200×750×1800 |
| WVFP31150 | 150 | 630 | 1260 | |
| WVFP31200 | 200 | 840 | 1680 | 1400×800×2000 |
| WVFP31300 | 300 | 1350 | 2700 | |
Manufacturing & Quality Assurance
Electrical Testing & Verification
WVFP units undergo electrical testing and functional verification to ensure stable output performance before delivery.
Production and Assembly
Multiple WVFP units are assembled and inspected in the production area to support different voltage and frequency conversion requirements.
Motor Load Testing
WVFP systems are tested with motor loads to verify stable AC output performance under industrial operating conditions.
System Assembly Capability
WVFP systems are assembled with modular power units and control components for industrial voltage and frequency conversion applications.
WVFP solutions are available for industrial equipment testing, export power compatibility, and special frequency applications.
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