Main Menu

See All Software See All Instruments See All Transducers See All Vibration Testing Equipment See All Electroacoustics See All Acoustic End-of-Line Test Systems See All Academy See All Resource Center See All Applications See All Industries See All Services See All Support See All Our Business See All Our History See All Global Presence

Main Menu

See All nCode - Durability and Fatigue Analysis See All ReliaSoft - Reliability Analysis and Management See All Test Data Management See All DAQ Software See All Drivers & API See All Utility See All Vibration Control See All High Precision and Calibration Systems See All DAQ Systems See All S&V Hand-held Devices See All Industrial Electronics See All Power Analyzer See All S&V Signal Conditioner See All Acoustic See All Current and Voltage Sensors See All Displacement See All Force sensors See All Load Cells See All Pressure See All Strain Gauges See All Temperature Sensors See All Torque Sensors See All Vibration See All Accessories for Vibration Testing Equipment See All Vibration Controllers See All Measurement Exciters See All Modal Exciters See All Power Amplifiers See All LDS Shaker Systems See All Test Solutions See All Actuators See All Combustion Engines See All Durability See All eDrive See All Production Testing Sensors See All Transmission & Gearboxes See All Turbo Charger See All Training Courses See All Acoustics See All Asset & Process Monitoring See All Custom Sensors See All Data Acquisition & Analysis See All Durability & Fatigue See All Electric Power Testing See All NVH See All Reliability See All Smart Sensors See All Vibration See All Weighing See All Automotive & Ground Transportation See All Calibration See All Installation, Maintenance & Repair See All Support Brüel & Kjær See All Release Notes See All Compliance See All BKSV Worldwide Contacts

Main Menu

See All API See All Microphone Cartridges See All Microphone Sets See All Microphone Pre-amplifiers See All Sound Sources See All Acoustic Calibrators See All Special Microphones See All Accessories for acoustic transducers See All Experimental testing See All Transducer Manufacturing (OEM) See All Piezoelectric Charge Accelerometers See All Piezoelectric CCLD (IEPE) accelerometers See All Electroacoustics See All Noise Source Identification See All Environmental Noise See All Sound Power and Sound Pressure See All Noise Certification See All Industrial Process Control See All Structural Health Monitoring See All Electrical Devices Testing See All Electrical Systems Testing See All Grid Testing See All High-Voltage Testing See All Vibration Testing with Electrodynamic Shakers See All Structural Dynamics See All Machine Analysis and Diagnostics See All Dynamic Weighing See All Vehicle Electrification See All Calibration Services for Transducers See All Calibration Services for Handheld Instruments See All Calibration Services for Instruments & DAQ See All On-Site Calibration See All Resources See All Software License Management

INVT Control Algorithm Optimised by Torque Transducer

INVT, China


The Chinese company, INVT, has utilized HBK’s T10F torque transducer and MP60 amplifiers to measure torque and speed of an electric motor controlled by a variable frequency drive (VFD) in order to optimize performance.VFDs, or inverters are widely used in industry to restrict an alternating current (AC) motor’s rotation by controlling the frequency of the electrical power supplied to the motor. By deploying optimized VFDs, industrial users can save energy, extend equipment life, reduce maintenance and tighten process control.


Better data on vector control technology

As part of its on-going research program, INVT – which manufactures low, medium and high voltage inverters, servo drives and brake units – needed better data on its vector control technology. This is one of the four main control methods for VFDs; the others are Volts/Hertz, Slip frequency and Direct Torque control. INVT worked in co-operation with HBK to build a dynamic mathematical model that could then be used to optimize the control algorithm of VFD to improve its performance. The optimized algorithm ramps up the motor gradually and smoothly, yet can be programmed to run the motor at a precise speed, stop at a precise position, or apply a specific amount of torque.

Complete integrated testing solution

HBK was able to provide a completely integrated solution for implementing the dynamic test that comprised transducer, measurement electronics, software and service. The precision of the T10F torque flange played an important role and this is mounted with couplings to compensate for misalignment between the drive motor and the load motor while measuring torque and rotating speed. The extremely short design of the T10F took up less space in the test stand than other models thus reducing vibration and saving money while the very high torsional stiffness and low moment of inertia minimized any sympathetic vibrations in the system.

Maintenance-free torque measurement system

In addition the torque measurement system remained maintenance-free because there are no bearings or slip rings. All torque and speed signals from the sensors are conditioned the HBK’s MP60 amplifiers and communicated with the computer via USB to a CANbus interface converter without any accuracy loss. INVT also benefitted from HBK China’s design consultancy, site erection advice, commissioning and customer training. By working in co-operation with HBK in this way, INVT aims to maintain its leadership in electric drive and industrial control technology while increasing its proficiency in mature vector control technology and special inverter control technology. INVT next aims to seek breakthroughs in four-quadrant control technology utilizing similar technology for optimizing performance


INVT (Shenzhen INVT Electric Co., Ltd) has been concentrating on industry automation and energy power since its foundation in 2002 and is committed to “Providing Excellent Products and Services, Empower Customers More Competitive”.

More about INVT

Technology used