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vfd brake chopper

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Frequency inverter (VFD) are the backbone of modern motor control, enabling energy-efficient speed regulation in industrial, commercial, and renewable energy systems. However, during deceleration or overhauling loads, motors regenerate energy back into the inverter’s DC bus, risking voltage spikes that can damage equipment or disrupt operations. To address this challenge, ​brake choppers for frequency inverter—paired with ​dynamic braking unit—provide a robust solution for safe energy dissipation, voltage stabilization, and system reliability.

What is a Brake Chopper?​​

A ​brake chopper​ is a high-speed semiconductor switch (IGBT or MOSFET) integrated into a VFI system to manage regenerative energy. When the DC bus voltage exceeds a predefined threshold, the brake chopper activates, diverting excess energy through a high-power resistor. This process prevents overvoltage tripping, protects sensitive components, and ensures continuous operation.

​Dynamic Braking Unit: A ​dynamic braking unit​ is a subsystem that combines the brake chopper with a high-wattage resistor. It specializes in rapid energy absorption during motor deceleration, converting kinetic energy into heat while maintaining precise control over the braking process.

Advantages of Brake Choppers with Dynamic Braking Units​

  • ​Overvoltage Prevention: Safeguards VFI capacitors, semiconductors, and connected equipment.
  • ​Cost Efficiency: Avoids expensive grid-tied regenerative systems by locally dissipating energy.
  • ​Precision Control: PWM modulation ensures smooth deceleration and adjustable braking torque.
  • ​Compact Design: Modular architecture saves space in industrial enclosures.
  • ​Versatility: Compatible with AC/DC drives, pumps, fans, and robotics.
  • ​How It Works​

    1. ​Energy Detection: During deceleration, the VFI detects rising DC bus voltage caused by regenerative energy.
    2. ​Chopper Activation: The brake chopper switches the dynamic braking resistor into the circuit, diverting excess current.
    3. ​Energy Dissipation: The resistor converts kinetic energy into heat, stabilizing DC bus voltage.
    4. ​Deactivation: Once voltage returns to safe levels, the chopper disconnects the resistor.
  • braking unit
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2 month
Address: Shenzhen, China


Main Product: frequency inverter, soft starter , Servo Drive & Motor, emi line filter, AC Reactor, brake chopper

Disclaimer:
The information of 2bvideo.com limited shown above is provided by the user or collected on the network. Video 2B does not guarantee the authenticity,accuracy and legitimacy of 2bvideo.com limited information. Video 2B does not involve legal relationships and disputes between users arising from transactions other than secured transactions on this website. Disputes shall be settled by you through negotiation. If you are the person in charge or relevant employee of this enterprise, if you find that the enterprise information is incorrect or want to manage thiscompany, please contact us jacklee1558@gmail.com, after you claim the enterprise, you can obtain management permission, publish supplyand demand information, bring consulting orders, and remove page advertisements.
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