AC Variable Frequency Power Supply
• Input voltage range:All(Global Power Grid)
• Input frequency:40-70Hz
• Output frequency:41Hz-73Hz adjustable，50/60/400Hz fixed（optional100Hz/200Hz，5-1000Hz can be customized）
• Output voltage:All(Three phase 0-520V adjustable (customizable higher voltage))
Product Introduction
The WVFP series variable frequency power supply is also a power frequency converter, which converts the different frequencies of the grid input to the power frequency (50Hz 60Hz 400Hz) that the user wants to use. Of course, WVFP can also adjust the output voltage (L-N 0-300Vac L-L 0-520Vac). With a WVFP, you can simulate the power grid of any country and use it in any country.
Working principle
WVFP series variable frequency power supply is designed based on the working principle of AC-DC-AC inverter loop. The first stage AC-DC conversion adopts three-phase full-bridge rectification mode to convert the input AC voltage into DC voltage; the second stage DC-AC inverter consists of high-power insulated gate bipolar transistor (IGBT), imported Mitsubishi IGBT drive unit and high-voltage non-inductive capacitor protection circuit. Based on the advanced and mature 2-level full-bridge inverter circuit, the control adopts advanced sinusoidal pulse width modulation (SPWM) and space vector pulse width modulation (SVPWM) technology to convert the DC bus voltage into an AC voltage source with arbitrary frequency and voltage adjustment through inverter technology. In order to purify the power grid and reduce the impact of the variable frequency power rectifier on the power grid, the rectifier of the variable frequency power supply can be upgraded from the traditional 6-pulse to 12-pulse and 18-pulse rectification, which effectively reduces the impact of the power grid. Active rectifier and filter unit can also be used.
Control Principle Diagram
Control principle topology diagram
List Of WVFP Technical Parameters
| Input Technical Parameters | ||
| Item | Technical Indicators | Remark |
| 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 Technical Parameters | ||
| 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 | |
| Inverter controller parameters | ||
| 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 parameters | ||
| 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 | ||
| 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 | ||
List of WVFP Power Models & Products
1.Three-phase Model List
| Type | Capacity (kVA) |
Output Current(A) | Dimension W×D×H(mm) |
|
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High Volt |
Low Volt |
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| 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 | |
| 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 | |
| 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 | |
| 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
| Type | Rated capacity （kVA） |
Output Current(A) | Dimension W×D×H(mm) |
|
|
High Volt |
Low Volt |
|||
| VFP11-500W | 0.5 | 4.2 | 2.1 | 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 | |
| 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 | |
Application
| Household Appliance Testing | Air Compressor Testing |
Laboratory and Medical Device Testing |
Smart Grid and Circuit Breaker Testing |
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WVFP series variable frequency power supply features easy operation, stability and reliability, and is suitable for a variety of applications such as factory production line power supply, product quality verification (involving voltage performance testing), product research and development, etc. Its multiple frequency switching and wide range of voltages not only facilitate customers to conduct various voltage and frequency conversion application tests, but also effectively isolate the power grid, minimize interference, and obtain the function of purifying power supply. It has been widely used in home appliances, EMC laboratories, motors, electronic components and other industries.
When the WVFP series variable frequency power supply is used in production lines or laboratories of household appliances, motors, compressors, central air conditioners and other electrical equipment, the WVFP series can simulate different voltages and frequencies in different countries as a standard power supply to test the reliability of the equipment under different input voltages and frequencies. The WVFP series can also be used in three-phase unbalanced load environments, and can be connected to one to N single-phase loads or a single three-phase load at the same time, with a wide range of uses and flexibility. |
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Cases and Gallery
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Inside-1
AC Variable frequency power supply
Inside-2
Inside-3
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