Single Phase Static Frequency Converter

The DOER DFC series single phase voltage and frequency converters  are primarily used for applications where there is a need to simulate the various voltages and frequencies of mains electricity among countries. They are an ideal devices to be used in testing labs for research, marine, aviation, industrial equipment and equipment on production lines. With static frequency converters to deliver a predetermined output voltage and frequency, and are designed to enable the connection of 60Hz powered equipment to a 50 Hz supply, or 50Hz powered equipment to a 60Hz supply. It can also convert or change the supply frequency 50hz or 60hz to 499Hz and voltage 0-300V adjustable.

  • Wide Range of Power Ratings (1kVA to 150kVA)
  • Adjustable Output Voltage (0 to 300V) & Frequency: 40 to 200Hz (optional 200Hz to 499Hz associated with the power capacity)
  • Galvanically Isolated with Pure Sine Wave Output
  • Simple to use and Operation
  • PWM IGBT Design
  • Front Control Panel with Output Metering – Frequency,Voltage, Current and Power
  • Fast Delivery: 15 -20 days

General Specification Datasheet of Single Phase Frequency Converter

MODEL NOS.DFC-JD-FX or DFC-JD-VF
- Phase:Single Phase, 2 Wire (1P+N+GE)
- Power Capacity:17 Model Ratings:1kVA,2kVA,3kVA,5kVA,10kVA,15kVA,20kVA,30kVA,45kVA,50kVA,60kVA,75kVA,100kVA,120kVA,150kVA,200kVA,250kVA
- Topology:Sine Wave Pulse Width Modulated (SPWM)
INPUT
either Three Phase or Single Phase Single Phase 100V-127V,220V-240V (L-N) or Three Phase 200V-240V,380V-480V (L-L)
*Voltage Swing ±15%* *Select one voltage value*
- Frequency:50Hz/60Hz (40 to 70Hz optional)
- Rectifier:6 Pulse
- Power Factor:0.8PF
OUTPUT
-Single Phase:High Voltage: 0-300V(L-N); Low Voltage: 0-150V(L-N)
-Voltage Stability:≤±1%
- Frequency:50Hz / 60Hz Fixed; 40-499.9Hz adjustable as optional
- Frequency Stability:≤0.02%
- THD:Harmonic Distortion:≤2
for Linear Loads;Pure Sine Wave
- Front Panel Display:4 Digital Display & Control Panel, voltage & Frequency adjust, On / Off Push Buttons
- Digital Metering:Output Frequency – 4 Digit LED Display; Output Voltage – 4 Digit LED Display; Current Load(Amps):  – 4 Digit LED Display; Load (Watts) or Kilo Watts -4 Digit LED Display.
- Overload Protect:110% for 15s, 2x max current rating within 1 second shut off
- Short Circuit Protect:Output Cut Off Immediately (Input & Output Circuit Breaker Protection)
- Noise:1 meter 60db to 70 dBA  (dependent on model rating)
- IP Rating:IP20 / NEMA1 (Option IP54 / NEMA3 )
- Size & Weight:Dependent on model rating and configuration.( Please consult to seller )
- Certificate:CE. Reference Standards EN60204, EN61000
- Warranty:2 Years / 24 Months from date of supply
-Working Temp.:-10℃ - 45℃
PHYSICALPower Connections:cables Input & Output (with bottom cable entry for floor mounted converter and converter with castors. With rear cable connection for rack mounted converter)
  • Top Cable Entry
  • Enclosures fitted with 100mm plinth
  • Remote Monitoring via RS485/RS232 (Modbus Protocol)
  • Voltage Free Contacts: 1 volt free contact for status of the system output. NO/NC mode.
  • When the output frequency is ≤120Hz, the frequency converter can supply 100% rated power capacity to the load application. The rated power capacity of frequency converter would be reduced to 50% when the frequency converter output 400Hz in need. Please consider our DFC-JD-400F* or DFC-CK-400F* for 400Hz Aviation and Military applications.
  • Accept Output Frequency 40Hz to 1000Hz for tailor made, please consult to vendor for quotation individually.
Frequency converters have both maximum kVA (Apparent Power) ratings and kW (Active Power) ratings – Kilowatt (kW)=kVA multiplied by Power Factor. Generally speaking, Equipment nameplate ratings are commonly stated in kVA. If using equipment nameplate ratings to size frequency converter, user maybe configure the system to be correctly sized based on kVA ratings, but actually exceeds the frequency converters kW rating. It minimises the risk of exceeding the kW rating of the converter by sizing the kVA rating of a load to be no greater than 70% of the kVA rating of the converter. Nevertheless, unless you have high certainty of the kW ratings of the loads, the safest way is to keep the sum of the load nameplate ratings below 70% of the converters kVA rating.
If the load type is inductive such as motors (aircons, pumps, etc), relays and transformers or capacitive type such as capacitors,it is essential that high inrush current,short-time overload factors and too low power factors are fully considered. Take motor (without a soft start facility) for instance, the start-up current 5 to 7 times the stated rating of the motor it is recommended that a Frequency Converter is selected that is 3 times the stated rated capacity of the load and that the inrush current does not exceed the “Max Output Current Rating” of the converter.

Topology Design of Static Frequency Converter

The architecture of the system is reliable in design that help to increase personnel safety on site as well as improve overall system availability. Topology and working principle with IGBT SPWM technology, SFC typically follows an AC-DC-AC topology, comprising Rectifier and Inverter stages with isolation transformer and AC filter.This topology enables the SFC to provide efficient conversion and pure sine wave power to loads. AC-DC-AC conversion ensures clean output with low harmonic distortion. Robust control circuits enable precise frequency & voltage regulation, supporting diverse applications. The lightweight construction suits mobile installations. Adaptability to harsh environments.

static frequency converter topology design-doerpower

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