Variable frequency transformer(VFT)
Variable Frequency Transformer (VFT) A special power transformer that simultaneously adjusts voltage and frequency of AC power. - Core Advantages: Precisely controls output voltage/frequency for diverse loads; features high stability, reliability, energy efficiency, and adaptability. It also offers multiple protections (overload, short circuit) and supports intelligent & remote control.
- Information
Why Purchase This Special Transformer Power Supply
When foreign equipment is imported into China, the frequency and voltage of the equipment are inconsistent with those in China, so this transformer is needed for conversion.
When equipment produced in China is exported to foreign countries, it is necessary to simulate the power grid voltage and frequency conditions of the destination country. It must be tested and aged well in China before it can be used abroad with confidence.
Our country is a major manufacturing country, providing cost - effective made - in - China products to various countries and regions around the world. Domestic equipment generally uses three - phase 380V 50Hz or single - phase 220V 50Hz. However, if the power grid frequency and voltage of the using country are inconsistent, this special equipment is also needed for conversion.
Advantages of This Type of Transformer Power Supply
It adopts complete input - output isolation technology, which can stabilize voltage, stabilize frequency, adjust voltage and adjust frequency.
It uses SPWM sine wave pulse width modulation technology (different from the PWM wave of frequency converters, which has low cost but more harmonics and is easy to damage equipment), with fast response speed and stable output.
IGBT high - frequency static inversion, with small size, light weight, low noise and high efficiency.
It adopts a unique dual - loop control method of instantaneous value and effective value, with high control precision and good waveform quality, and can adapt to various loads.
High - power IGBT modules and highly integrated module drive circuits ensure reliable operation.
It is suitable for various loads such as resistive, inductive and rectifying loads.
It has protection functions for abnormal conditions such as overheating, overcurrent and short circuit.
It has parameter setting memory function and shortcut key operation (customizable).
The power supply voltage can be adjusted online, and the output frequency can be set.
Three - phase independent power H - bridge topology structure, capable of carrying three - phase unbalanced loads.
Multiple test modes to adapt to various test adjustments.
Product Technical Specifications
1. General Product Parameters
|
Parameter |
Specification |
|
Color |
Off-white |
|
Cooling Method |
Dry type |
|
Transformer Type |
Single-phase isolation transformer |
|
Capacity |
5 kVA |
|
Input Voltage |
220V |
|
Input Frequency |
50Hz |
|
Output Voltage |
0–300V adjustable |
|
Output Frequency |
40–70Hz |
2. Technical Specifications – Variable Frequency Transformer BPK-11005
|
Item |
Specification |
|
Model |
BPK-11005 (Single-phase input, single-phase output, 5 kVA) |
|
Circuit Type |
IGBT / PWM control |
|
Output Waveform |
Standard sine wave, CF = 1.4 |
|
Input Voltage |
Single-phase 2-wire + ground, 220V ±10%, 50Hz / 60Hz ±3Hz |
|
Output Voltage |
Single-phase 2-wire + ground, Line-to-Neutral (L–N): High range: 0–300V, Low range: 0–150V |
|
Output Current |
High range: 20A, Low range: 40A |
|
Output Frequency |
Fixed 50Hz / Fixed 60Hz / Continuously adjustable 40–70Hz |
|
Frequency Stability |
≤ 0.01% |
|
Load Regulation |
≤ 1% |
|
Waveform Distortion |
≤ 2% (purely resistive load) |
|
Crest Factor |
3:1 |
|
Panel Display |
Output voltage, output current, output frequency, output power, power factor (switchable display) |
|
Protection Features |
Over-current, over-voltage, over-temperature, short-circuit protection, self-diagnosis, and alarm |
|
Protection Response Time |
≤ 2 ms |
Table 1: Voltage and Frequency Parameters
Input Type
Input Parameters
Input Frequency
Convert→
Output Type
Output Parameters
Output Frequency
3-phase Input
380v
50Hz
3-phase Output
1000v, 600v, 575v, 480v460v, 440v, 420v, 415v380v, 240v, 220v, 208v200v, 115v (Aviation), Customizable
60Hz
3-phase Input
480v, 460v, 440v, 415v220v, 208v, 200v, Others Customizable
60Hz
3-phase Output
400v, 380v (Phase Voltage 220v), Others Customizable
50Hz
Single-phase Input
220v
50Hz
Single-phase Output
220v, 200v, 127v, 120v, 115v110v, 100v, Others Customizable
60Hz
Single-phase Input
220v, 200v, 127v, 120v115v, 110v, 100v
60Hz
Single-phase Output
220v, Others Customizable
50Hz
Table 2: Capacity Specifications
|
Type |
Common Capacity Specifications |
|
3-phase |
6kva, 9kva, 15kva, 20kva, 30kva, 45kva, 60kva, 75kva90kva, 100kva, 120kva, 150kva, 200kva, 250kva, 300kva400kva, 500kva, 600kva, 800kva, 1000kva, 1200kva, 1500kva1800kva, 2000kva, 2500kva, etc. |
|
Single-phase |
1kva, 2kva, 3kva, 5kva, 10kva, 15kva, 20kva, 30kva, 40kva50kva, 60kva, 80kva, 100kva, 150kva, 200kva |
Table 3: Main Components
|
Category |
Component List |
|
Core Parts |
IGBT Module, Main Transformer, Main AC Contactor, Rectifier Bridge, Display Meter, DC Filter Capacitor |
|
Part 1 |
AC Capacitor, Main Control Board, Driver Board, Main Control Circuit IC, Input Air Switch, Output Air Switch |
|
Part 2 |
AC Current Transformer, Cooling Fan, Heat Sink, Main Circuit Wires, Terminal Block, Fuse |
Scope of application
Industrial Manufacturing: Smooth speed control for motors (fans, pumps, compressors); stable, adjustable power for automated lines (robots, CNC machines).
Power Transmission & Distribution: Converts unstable new energy (solar/wind) for grid access; enables interconnection of different voltage/frequency grids.
Transportation: Voltage/frequency adjustment for EV charging piles; powers traction motors for rail transit (subways, high-speed trains).
Aerospace: Simulates variable power for aircraft ground testing; stabilizes spacecraft power from solar panels.
R&D & Laboratory: Provides customized power for precision test equipment; acts as a key tool for power conversion and motor control research.
Why Purchase This Special Transformer Power Supply
When foreign equipment is imported into China, the frequency and voltage of the equipment are inconsistent with those in China, so this transformer is needed for conversion.
When equipment produced in China is exported to foreign countries, it is necessary to simulate the power grid voltage and frequency conditions of the destination country. It must be tested and aged well in China before it can be used abroad with confidence.
Our country is a major manufacturing country, providing cost - effective made - in - China products to various countries and regions around the world. Domestic equipment generally uses three - phase 380V 50Hz or single - phase 220V 50Hz. However, if the power grid frequency and voltage of the using country are inconsistent, this special equipment is also needed for conversion.
Advantages of This Type of Transformer Power Supply
It adopts complete input - output isolation technology, which can stabilize voltage, stabilize frequency, adjust voltage and adjust frequency.
It uses SPWM sine wave pulse width modulation technology (different from the PWM wave of frequency converters, which has low cost but more harmonics and is easy to damage equipment), with fast response speed and stable output.
IGBT high - frequency static inversion, with small size, light weight, low noise and high efficiency.
It adopts a unique dual - loop control method of instantaneous value and effective value, with high control precision and good waveform quality, and can adapt to various loads.
High - power IGBT modules and highly integrated module drive circuits ensure reliable operation.
It is suitable for various loads such as resistive, inductive and rectifying loads.
It has protection functions for abnormal conditions such as overheating, overcurrent and short circuit.
It has parameter setting memory function and shortcut key operation (customizable).
The power supply voltage can be adjusted online, and the output frequency can be set.
Three - phase independent power H - bridge topology structure, capable of carrying three - phase unbalanced loads.
Multiple test modes to adapt to various test adjustments.
Product Technical Specifications
1. General Product Parameters
|
Parameter |
Specification |
|
Color |
Off-white |
|
Cooling Method |
Dry type |
|
Transformer Type |
Single-phase isolation transformer |
|
Capacity |
5 kVA |
|
Input Voltage |
220V |
|
Input Frequency |
50Hz |
|
Output Voltage |
0–300V adjustable |
|
Output Frequency |
40–70Hz |
2. Technical Specifications – Variable Frequency Transformer BPK-11005
|
Item |
Specification |
|
Model |
BPK-11005 (Single-phase input, single-phase output, 5 kVA) |
|
Circuit Type |
IGBT / PWM control |
|
Output Waveform |
Standard sine wave, CF = 1.4 |
|
Input Voltage |
Single-phase 2-wire + ground, 220V ±10%, 50Hz / 60Hz ±3Hz |
|
Output Voltage |
Single-phase 2-wire + ground, Line-to-Neutral (L–N): High range: 0–300V, Low range: 0–150V |
|
Output Current |
High range: 20A, Low range: 40A |
|
Output Frequency |
Fixed 50Hz / Fixed 60Hz / Continuously adjustable 40–70Hz |
|
Frequency Stability |
≤ 0.01% |
|
Load Regulation |
≤ 1% |
|
Waveform Distortion |
≤ 2% (purely resistive load) |
|
Crest Factor |
3:1 |
|
Panel Display |
Output voltage, output current, output frequency, output power, power factor (switchable display) |
|
Protection Features |
Over-current, over-voltage, over-temperature, short-circuit protection, self-diagnosis, and alarm |
|
Protection Response Time |
≤ 2 ms |
Table 1: Voltage and Frequency Parameters
Input Type
Input Parameters
Input Frequency
Convert→
Output Type
Output Parameters
Output Frequency
3-phase Input
380v
50Hz
3-phase Output
1000v, 600v, 575v, 480v460v, 440v, 420v, 415v380v, 240v, 220v, 208v200v, 115v (Aviation), Customizable
60Hz
3-phase Input
480v, 460v, 440v, 415v220v, 208v, 200v, Others Customizable
60Hz
3-phase Output
400v, 380v (Phase Voltage 220v), Others Customizable
50Hz
Single-phase Input
220v
50Hz
Single-phase Output
220v, 200v, 127v, 120v, 115v110v, 100v, Others Customizable
60Hz
Single-phase Input
220v, 200v, 127v, 120v115v, 110v, 100v
60Hz
Single-phase Output
220v, Others Customizable
50Hz
Table 2: Capacity Specifications
|
Type |
Common Capacity Specifications |
|
3-phase |
6kva, 9kva, 15kva, 20kva, 30kva, 45kva, 60kva, 75kva90kva, 100kva, 120kva, 150kva, 200kva, 250kva, 300kva400kva, 500kva, 600kva, 800kva, 1000kva, 1200kva, 1500kva1800kva, 2000kva, 2500kva, etc. |
|
Single-phase |
1kva, 2kva, 3kva, 5kva, 10kva, 15kva, 20kva, 30kva, 40kva50kva, 60kva, 80kva, 100kva, 150kva, 200kva |
Table 3: Main Components
|
Category |
Component List |
|
Core Parts |
IGBT Module, Main Transformer, Main AC Contactor, Rectifier Bridge, Display Meter, DC Filter Capacitor |
|
Part 1 |
AC Capacitor, Main Control Board, Driver Board, Main Control Circuit IC, Input Air Switch, Output Air Switch |
|
Part 2 |
AC Current Transformer, Cooling Fan, Heat Sink, Main Circuit Wires, Terminal Block, Fuse |
Scope of application
Industrial Manufacturing: Smooth speed control for motors (fans, pumps, compressors); stable, adjustable power for automated lines (robots, CNC machines).
Power Transmission & Distribution: Converts unstable new energy (solar/wind) for grid access; enables interconnection of different voltage/frequency grids.
Transportation: Voltage/frequency adjustment for EV charging piles; powers traction motors for rail transit (subways, high-speed trains).
Aerospace: Simulates variable power for aircraft ground testing; stabilizes spacecraft power from solar panels.
R&D & Laboratory: Provides customized power for precision test equipment; acts as a key tool for power conversion and motor control research.
