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Active Front End (AFE)
VTF880 series active front end
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.
VTF880 series active front end
VTF880-RFcan be used as both a rectifier and an inverter, operating in four quadrant mode. Adopting IGBTand SPWMmode, it can control the size and phase of ACpower, and make the ACinput 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 DCbus voltage increases, It can make the phase of the ACinput 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.
Digital Energy Feedback Unit
VTF880 series digital energy feedback
VTF880 energy feedback is suitable for three-phase AC power supply equipment with AC voltage below 660V and 50Hz. It adopts the most advanced military grade high-performance 32-bit DSP digital processing controller with floating point operation, which can quickly detect system voltage, current, power, reactive power and other parameters, and achieve coordinate rotation changes. The control and operation of digital PI regulators and other functions drive the power device (IGBT) of PWM converters, allowing the output energy of the product to flow to the power grid, achieving energy conservation.
Energy Feedback Inverter
VTF900 series energy feedback inverter
VTF900 series is a modular design, with the characteristics of compact structure, easy installation and debugging, suitable for any brand of frequency converter or inverter, energy feedback and rectifier feedback can be exchanged at any field application; The working principle is to return the regenerative energy generated in the process of motor speed regulation to the power grid; The energy loss caused by the resistance heating of the conventional energy consumption type brake unit is avoided, so as to achieve the objective energy-saving effect.
Elevator Energy Feedback Unit
Elevator energy feedback
Elevator energy feedback feeds back the regenerative energy generated during the process of motor speed regulation to the power grid, avoiding the energy loss caused by conventional energy consuming braking units due to resistance heating, thus achieving considerable energy-saving effects.
Brake Unit
Brake Unit
Brake Unit uses advanced power technology and high- performance MCU controller and with a New generation of IFBT power devices combined with research and production of high performance brake products The product releases the electric energy generated by the motor during the braking process through the power resistance (braking resistance) to generate enough braking torque to keep the frequency converter and other equipment in normal operation.
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