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    AI Overview
    FAQ: When are closed-loop and open-loop vector control useful?
    Closed-loop vector control VFDs use motor encoder feedback to provide precise speed regulation, high torque at low speeds (
    200
    %
     at
    00
    0
     RPM), and rapid response, surpassing sensorless options. By analyzing torque and magnetizing currents separately, they deliver superior control for demanding applications like cranes, lifts, and winders, maintaining stability across the full speed range. 
    This video explains how a closed loop VFD system works:
    Related video thumbnail
    03:50
    How Does Closed Loop Control Work in a VFD?
    KEB America
    YouTube• Feb 15, 2019
    Key Advantages 
    • High Performance: Offers 200% starting torque at 0 Hz/RPM, enabling full load management from a stop.
    • High Speed Response: Superior speed control range (
      >1
      ∶
      1500
      ) and dynamic response (
      >50is greater than 50
      >50
       Hz), ideal for fast-changing loads.
    • Torque Control Mode: Allows direct, precise control of motor torque rather than just speed, crucial for tension control (winders/rewinders).
    • Accuracy: Encoder feedback continuously compares actual speed with commanded speed for maximum accuracy. 
    Typical Applications 
    • Elevators and Lifts: Ensuring smooth, safe movement and holding torque.
    • Cranes and Hoists: Holding, raising, and lowering heavy loads without dropping.
    • Paper/Web Handling: Maintaining precise material tension.
    • Machine Tools: High-precision, dynamic machining applications. 
    This video compares open and closed loop vector control systems:
    Related video thumbnail
    1m
    Open and Closed Loop Vector Control Systems - A Galco TV ...
    GalcoTV
    YouTube• Nov 9, 2021
    Closed Loop vs. Other Methods 
    • VS. Sensorless Vector: Closed-loop uses a physical encoder, whereas sensorless relies on mathematical estimations, making closed-loop far superior at low speeds (near
      00
      0
       Hz).
    • VS. Volts/Hz: Closed-loop provides advanced, independent control of torque and flux, whereas Volts/Hz is simpler and intended for variable torque loads like fans/pumps. 
    • Variable Frequency Drive Control Methods - Yaskawa
      May 5, 2014 — The Closed Loop Vector (CLV) motor control method uses a vector algorithm to determine output voltage just like the OLV method. Th...
      Yaskawa America
    • How Does Closed Loop Control Work in a VFD?
      Feb 15, 2019 — so how does closed loop control work in a VFD. we've already covered the basics of a VFD its components and how the openloop volts...
      3:50
      YouTube·KEB America
    • VFD Volts/Hertz vs Sensorless Vector from AutomationDirect
      Aug 11, 2025 — typical modern drives have two velocity control modes volts hertz and vector or flux control volts herz or volts frequency simply ...
      1:03
      YouTube·AutomationDirect.com
    • Understanding Scalar and Vector Control in VFDs - GTAKE
      Dec 27, 2024 — For even more precision, closed-loop vector control incorporates position feedback devices such as encoders to provide real-time i...
      GTAKE
    • Variable Frequency Drive Control Methods - Yaskawa
      May 5, 2014 — The Closed Loop Vector (CLV) motor control method uses a vector algorithm to determine output voltage just like the OLV method. Th...
      Yaskawa America
    • How Does Closed Loop Control Work in a VFD?
      Feb 15, 2019 — so how does closed loop control work in a VFD. we've already covered the basics of a VFD its components and how the openloop volts...
      3:50
      YouTube·KEB America
    • VFD Volts/Hertz vs Sensorless Vector from AutomationDirect
      Aug 11, 2025 — typical modern drives have two velocity control modes volts hertz and vector or flux control volts herz or volts frequency simply ...
      1:03
      YouTube·AutomationDirect.com
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    Web results

    How Does Closed Loop Control Work in a VFD?


    KEB America
    https://www.kebamerica.com › blog › how-does-closed...
    KEB America
    https://www.kebamerica.com › blog › how-does-closed...
    Feb 15, 2019 — In closed loop control, the drive uses the encoder feedback in its control algorithm to know exactly what to output to the motor to run at the desired speed ...Read more
    People also ask
    What is vector control on a VFD?
    An error has occurred. Please try again later.
    What is closed loop VFD?
    Closed loop control in VFD systems ensures precise motor operation by continuously monitoring and adjusting performance. This system integrates feedback from the motor to maintain desired speed and torque, even under varying load conditions.Mar 5, 2025

    What is Closed Loop Control in VFD Systems - Canroon


    Canroon
    https://www.canroon.com › Industry-Insights › What-is-...
    Canroon
    https://www.canroon.com › Industry-Insights › What-is-...
    What is a closed loop vector?
    Closed-loop vector control

    That is, if the shaft overshoots the desired position, then too much torque is being applied, and vice-versa. Based on shaft position, the voltage can be adjusted to increase or decrease the torque, regardless of motor speed.    Jul 30, 2016

    When are closed-loop and open-loop vector control useful?


    Motion Control Tips
    https://www.motioncontroltips.com › faq-when-are-clos...
    Motion Control Tips
    https://www.motioncontroltips.com › faq-when-are-clos...
    What is a disadvantage of open loop control in a VFD system?
    An open-loop control system does not assess or correct the plant output for internal and external disturbances that affect motor speed, such as changes in motor load. Therefore, the system cannot automatically correct the deviation between the desired and the actual motor speeds.

    Open-Loop and Closed-Loop Motor Control Techniques - MathWorks


    MathWorks
    https://www.mathworks.com › help › mcb › open-loop-a...
    MathWorks
    https://www.mathworks.com › help › mcb › open-loop-a...

    Web results

    Closed-Loop vs. Open-Loop Vector Control in VFDs


    Fuji Electric Corp. of America
    https://americas.fujielectric.com › closed-loop-vs-open-l...
    Fuji Electric Corp. of America
    https://americas.fujielectric.com › closed-loop-vs-open-l...
    Closed-Loop vs. Open-Loop Vector Control in VFDs · Lower cost and simpler wiring · Good dynamic torque and speed control · Compact and easier to maintain ...Read more
    Videos
    Open and Closed Loop Vector Control Systems - A Galco TV ...
    YouTube · GalcoTV
    Nov 9, 2021
    YouTube · GalcoTV
    2:41
    Closed loop vector control uses an encoder for motor shaft position feedback, allowing up to 200% of the motor's rated torque at zero RPM.
    GalcoTV
    YouTube·
    Nov 9, 2021

    Open and Closed Loop Vector Control Systems - A Galco TV ...

    YouTube·GalcoTV·Nov 9, 2021
    YouTube
    In this video
    • 00:23
      What is Vector Control?
    • 00:51
      Closed Loop vs Open Loop
    • 01:13
      What is Open Loop Vector Control?
    • 01:32
      Benefits of Closed Loop Vector Control
    • 01:49
      Benefits of Open Loop Vector Control
    • 02:21
      Conclusion
    How Does Closed Loop Control Work in a VFD?
    YouTube · KEB America
    Feb 15, 2019
    YouTube · KEB America
    3:50
    Closed loop control in a VFD uses encoder feedback to precisely control motor speed and torque, unlike open loop control.
    KEB America
    YouTube·
    Feb 15, 2019

    How Does Closed Loop Control Work in a VFD?

    YouTube·KEB America·Feb 15, 2019
    YouTube
    In this video
    • 00:16
      Open Loop Recap
    • 00:40
      Closed Loop Control
    • 01:24
      Closed Loop Block Diagram
    • 01:47
      Gearbox Example
    • 02:10
      The Speed Controller
    • 02:25
      Closed Loop Control Graph
    • 02:45
      Motor Model
    • 03:25
      Conclusion
    How to Configure the Closed loop Vector Control of PMSM on ...
    YouTube · INVT
    Apr 22, 2021
    YouTube · INVT
    3:50
    INVT
    YouTube·
    Apr 22, 2021

    How to Configure the Closed loop Vector Control of PMSM on ...

    YouTube·INVT·Apr 22, 2021
    YouTube
    View all

    Web results

    Cheapest closed-loop VFD setup : r/PLC


    Reddit · r/PLC
    10+ comments · 2 years ago
    Reddit · r/PLC
    10+ comments · 2 years ago
    Simple, cheap closed loop VFD control · How does using a VFD in vector or "torque control" mode affect the behavior of the motor? r/PLC. •. How ...Read more

    Which VFD Motor Control Method Is Best for You?


    Motion Automation Intelligence
    https://ai.motion.com › Blog
    Motion Automation Intelligence
    https://ai.motion.com › Blog
    Feb 17, 2023 — Closed-Loop Vector Control. Like OLV, closed-loop vector (CLV) motor control utilizes an algorithm to establish output voltage. However, a ...Read more

    CONTROL METHOD


    Yaskawa America
    https://www.yaskawa.com › getAttachment
    Yaskawa America
    https://www.yaskawa.com › getAttachment
    PDF
    Closed-loop control is also able to run a motor in torque-control mode. Torque control enables the VFD to control motor. CLOSED-LOOP VECTOR CONTROL CHECKLIST.Read more
    6 pages

    Defining Scalar and Vector Control in VFD Outputs


    Control.com
    https://control.com › Technical Articles
    Control.com
    https://control.com › Technical Articles
    Apr 26, 2022 — Closed Loop Vector Control. In mathematics, a vector is formed by two quantities operating at right angles to each other. In complex math ...Read more

    Closed Loop Vector Control VFD


    dolyconinverter.com
    https://www.dolyconinverter.com › closed-loop-vector-...
    dolyconinverter.com
    https://www.dolyconinverter.com › closed-loop-vector-...
    CT300 Series Close Loop Vector inverter VFD, based on DSP control system, has high performance vector control technology of high performance of speed and ...Read more

    Vector Control | iKnow Knowledge Base


    Invertek Drives
    https://www.invertekdrives.com › vfd-fundamentals › ve...
    Invertek Drives
    https://www.invertekdrives.com › vfd-fundamentals › ve...
    Vector control offers the advantages of better speed holding, better response to sudden load changes as well as greatly improved torque at low speeds.Read more

    When are closed-loop and open-loop vector control useful?


    Motion Control Tips
    https://www.motioncontroltips.com › faq-when-are-clos...
    Motion Control Tips
    https://www.motioncontroltips.com › faq-when-are-clos...
    Closed-loop vector control. When an encoder is used in conjunction with a vector drive to provide shaft position feedback, the system is referred to as closed- ...Read more
    People also search for
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