Product Profile
VTF880-RF can be used as both a rectifier and an inverter, operating in four quadrant mode. Adopting IGBT and SPWM mode, it can control the size and phase of AC power, and make the AC input wave close to sine wave through various filtering and energy storage links in the front end. The power factor is adjustable positive and negative with a midpoint of 1. When the braking energy on the motor side returns through the inverter, the DC bus voltage increases. It can make the phase of the AC input wave opposite to the power supply voltage, achieve regenerative power generation operation, and feed back the regenerative energy to the AC power grid to meet the control requirements of high-performance inverters.
Product Features
Harmonic ControlPWM control method, current harmonics <5% (GB/T14549-1993).
Voltage StabilityThe DC bus voltage remains stable throughout operation.
Adjustable Power FactorPhase difference control allows adjustment between -1 to +1.
Smart DisplayChinese 7-inch touch screen display for calculus measurement and grid energy feedback.
High ReliabilityBuilt-in protection against overvoltage, undervoltage, overcurrent, short circuit, and lock.
Applications
Widely used in engine dynamometer, electric vehicle motor testing, new energy hybrid transmission testing, motor performance testing, lifting and lifting loads, paper transmission industry, as well as DC bus sharing occasions, AFE frequency converter control.
Frequently Asked Questions (FAQ)
What are the primary functions of the VTF880 unit?
The VTF880 functions as both a rectifier and an inverter, allowing it to operate in four-quadrant mode to manage AC power phase and size effectively.
How does the device handle regenerative energy?
When motor braking energy returns, the DC bus voltage increases. The unit feeds this regenerative energy back into the AC power grid, improving energy efficiency.
What is the harmonic performance of this unit?
Utilizing PWM control technology, the unit maintains current harmonics at less than 5%, meeting GB/T14549-1993 standards.
Which industries typically use the VTF880 series?
It is widely applied in electric vehicle motor testing, engine dynamometers, paper transmission, lifting loads, and hybrid transmission performance testing.
What safety protections are integrated into the system?
The system includes comprehensive protection against overvoltage, undervoltage, overcurrent, short circuits, and equipment overheating with very fast response times.
Can the power factor be adjusted on this feedback unit?
Yes, by controlling the phase difference between voltage and current, the power factor can be adjusted between -1 and +1.
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