variable-speed

The wind turbine is the key component in the variable-speed wind power generation system, whose performance influences the total system.

A motor in which the speed is controlled is called a variable speed motor and is either a shunt or series motor.

The technology of variable-speed constant-frequency wind energy generation, is the main form of wind turbine generators.

Further, the operation of the variable speed drive is combined with a pulse width modulation control of different system components.

Infinitely variable speed control motor, running for passive ventilation, provides with a pleasant room atmosphere.

The boxed processor fan heatsink uses a variable speed fan that increases in speed as the air temperature entering the fan increases.

Variable frequency and variable speed motor system is of high reliability, fault-tolerant capability and high intelligence.

Rotation of the work piece is assured by a SIEMENS brushless Digitally Controlled servomotor with infinitely variable speed.

Twin stator brushless doubly fed generation system is quite prospective for variable speed and constant frequency solutions.

Composed by pair of gears, variable speed forked set and friction clutch.

The stability of a variable speed grinding system is studied theoretically and experimentally.

The drive system preferably includes a gear, gearbox, variable speed drive and at least one positioning sensor.

UG Lever governors are widely used for variable speed control.

Since Spang ships the variable speed motor package pre-configured, it does not require any special installation procedures.

The simulation result shows the accuracy of the modeling of the direct-driven variable-speed constant-frequency wind turbine generators.

This paper studies the integrated power and attitude control of a spacecraft using variable speed control moment gyros (VSCMG).

The invention relates to hoisting, pulling, hauling equipment, in particular to an infinite variable speed hoisting winch.

Cute design vibrators . It comes with a powerful micro motor with variable speed control.

Aiming at the object, here studies are performed on equipping a variable-speed pumping source on the missile-loaded hydraulic actuator.

The feeding system of the machine is controlled by a stepless variable speed motor with easy and reliable speed regulation.

The structure, mechanism and numerical control method of lathe spindle driven by variable speed switched reluctance system were introduced.

Through the crank link system in high-pressured condition of variable speed movement with drilling pump power transfer.

Cute design twin vibrators . It comes with individual controls for both vibrators . Powerful micro motor with variable speed control.

The parallel inverter was used to explain the capacity of variable-speed system.

The Angel Kiss has a short stationary insertable body with a powerful variable speed clitoral tickler.

Hydrostatic transmission, double drive, two amplitudes, two gears and infinitely variable speed.

Secondary variable speed saw blade positioning, convenient operation, saving energy.

Headquartered in Beijing, Leader & Harvest develops, manufactures and commercialises medium voltage (MV) variable speed drives.

Hydrostatic Drive, variable-speed, high torque, low-horsepower, shock-resistant operation.

Agricultural machinery. Endless variable-speed V-belts and groove sections of corresponding pulleys.

A kind of variable speed control system of a brushless DC motor without a rotor position sensor was designed.

Low-speed system performance is improved by hydraulic speed controlling, then it realizes the variable speed in large range.

This paper build induction machine based constant speed wind turbine model and DFIG based variable speed wind turbine model.

A variable speed drive is provided for operating a compressor motor in a refrigerant system.

Variable Speed: New variable speed pumps offer a noticeable improvement over accumulator tank systems.

Variable speed adjustment for carton forming and sealing. Reducing labor requirements.

The operational layer controls also variable speed signs, lane closing symbols and variable message signs.

A comprehensive dynamic analysis was performed for the impulse variable speed device.

Variable-speed control pump performance, more economical, a broader scope of application of all agricultural water pumps can be used.

Spang's SPE100 is an integrated motor and control product that offers variable speed in a single package.

Variable speed motor drive (VSMD) is used to control the electrical machine by modifying the frequency of its output voltage.

Most of main pump in pump stations driven by variable speed motor for long distance transport petroleum engineering.

Electronic variable speed transmission, stable and reliable, long life, low noise.

These solutions are built around 3 core components: rotating machines, variable speed drives, automation and process controls.

Multi-stage variable timer, variable speed mixing and automatically stops the machine .

This paper has mainly studied the novel variable-pitch variable-speed wind turbines and Yaw-control system of wind turbine generator.

Variable speed constant frequency (VSCF) double fed wind power generation is the research hotspot in wind power generation systems.

Therefore, an effective combination of ramp metering and variable speed limit control is important to achieve a good performance.

The multi-target rapid maneuver control problem is studied for agile satellites with Variable Speed Control Moment Gyro(VSCMG) as actuator.

Variable speed constant frequency wind generation is a trend of wind generation system.

The application of ABB ACS800 direct torque control(DTC) frequency-variable speed control system in the reducer loading test was presented.

Independent variable speed drives on telescoping section.

The performance of AC variable speed drive system has been improved greatly since field-oriented control is applied.

A stand-alone variable-speed constant-frequency tidal current energy conversion system based on hydraulic transmission is proposed.

Variable speed control of a governor.

Variable Speed Drive, and their use is aimed at speed control of electric energy to achieve.

A driven method of extruders by variable speed switched reluctance motor drive is put forward.

The maximum speed of this kind of variable-speed bicycle is 30 km per hour.

All Medium-voltage motors and Low-voltage variable- speed motors and drives rated 250 Kilowatts and above.

There is provided a compact and highly durable variable-speed traction drive transmission device.

Variable-frequency variable speed motor, reducing host in order to achieve the purpose of saving electricity.

Some require continuous speed of work, generally should be used with variable speed drive.

However, a variable speed drive based on induction motors is slowly introduced.

from those studies , we may know the variable speed drive in electric submergible pump is feasible and may run reliably.

The variable frequency variable speed system of three-phase asynchronous motor based on DSP has been researched in this paper.

ABB is the world's leading supplier of variable speed drives.

Feed speed with variable speed.

and at least one variable speed motor (48, 56) driving the first and second transport belts (32, 34).

With the SVPWM theory and technology, variable-speed system is designed to be modules in the paper.

But for turbines above 1 MW they also started to take variable speed because of problems they had with the gearboxes.

feed direction, the same inverter to achieve the use of variable speed motor in order to achieve work into rewind.

5 the machine over 150 is driven by a variable-speed motor.

Comparison Study of Two Popular Voltage Source High-Voltage Frequency Conversion Variable Speed Drivers

Closed-Loop Control of Matrix Converter Used for Variable Speed Constant Frequency Supply System

The use analysis of the variable speed hydraulic coupling in the long distance belt conveyor

Wind power; Pitch control; Variable speed constant frequency; Electro-hydraulic proportional valve; Experimental platform;

Study of Math Model and Control Strategy of Variable Speed-constant Frequency Windmill Generator

Application of the Technology of Frequency Variable Speed Regulation in a Vertical Cement Kiln Plant

Study of AC excited doubly-fed generator used by variable-speed constant-frequency wind power generation

Simulation Analysis of Energy Saving of Variable Speed Hydraulic Driving System for Cutter Head of Shield Tunneling Machine

Design and Implementation of Energy-consumed Braking Circuit in AC Frequency-variable Speed-adjustable System

Application of the Frequency Variable Speed Regulation Technology to Energy Saving of Cement Production Equipment

Electro-hydraulic proportional control system simulation analysis of the hydro-viscous variable speed drive

Frequency variable speed regulation technology and its application

The Application of Variable-frequency Variable-speed Technology in the Fire-fighting and Water Supply System

Study on the Main Variable Speed-limit Controlling Strategy of the Surveillance and Control of Highway

The Application Current Situations and Development Trend for High Voltage Variable Frequency Variable Speed Technology

The Application of Converter Technique in Variable Speed Constant Frequency Asynchronous Wind Power Generation Systems

Analysis on energy saving of distributed-variable speed pump used in district heating systems

Application of Weighted Principal Component Analysis in Comprehensive Evaluation for Variable Speed Limits

Analysis on energy saving of distributed-variable speed pump used in district heating systems

Application of Weighted Principal Component Analysis in Comprehensive Evaluation for Variable Speed Limits

Analyses of frequency variable speed regulation for general motor and its applications

Design and test study on excitation control system for variable-speed constant-frequency wind power generator with double feedback function

Problem in Design and Manufacture of Variable-frequency Variable-Speed Motor and Its Treatment

Automatic Generation Control of a Wind Farm With Variable Speed Wind Turbines

The Imitation of the Fan Characteristic in Variable-speed Constant-frequency Wind-power Generation System

Research On Vibration Model and Simulation for an Outer Ring Faulty Bearing Under Variable Speed

Optimization Control of Full-Variable-Speed Pump Stations Considering the Losses of the Frequency Converter and the Motor

A Recursive Method of Time-Frequency Analysis for the Signal Processing of Flutter Test with Progression Variable Speed

A Recursive Method of Time-Frequency Analysis for the Signal Processing of Flutter Test with Progression Variable Speed

Knife-carriage Variable-speed Feeding Mechanism of Log-core Veneer Lathe and Its Application

The Design of a High Performance Variable-speed Permanent-Magnet Synchronous Motor

Spacecraft Adaptive Attitude Tracking and Stable Control with Variable Speed Control Moment Gyroscopes

Torque pulsation of an induction motor variable frequency and variable speed system

Design of Ratchet Variable Speed Mechanism and its Application in Textile Machines

Speed mode control of variable-speed constant-frequency wind energy generation system with double fed induction generator

Aerodynamic Parameter Identification of Variable Speed Horizontal Axis Wind Turbine System

Overviews of Excitation Control Strategies for Variable Speed Constant Frequency Doubly Fed Generator

Discussion on the Slots coupling of the Frequency Control Variable Speed Asynchronous Motors

Discussion on the Slots coupling of the Frequency Control Variable Speed Asynchronous Motors

Optimized design and performance analysis of induction machines for inverter-driven variable speed systems

Sliding mode control during variable speed constant frequency doubly-fed wind generator no-load connecting electric grid

Variational rule of the variable speed parameter of large circulating desulfurizer

Application of frequency changing technique in designing variable speed cutting milling machine

Multi-motor synchronization variable speed drive of dyeing and printing machines without dancers and tension sensor

Optimal Wind Energy Capturing Control for Variable-Speed Constant-Frequency Doubly-Fed Wind Power Generation System

Study of Driving and Controlling Method in Periodicity Variable-Speed SCANING MECHANISM

Study on Adaptive Resonant Regulator-based Doubly Fed Driver for Variable-speed Constant-frequency Wind-power Generator

Fuzzy Logic Control on Freeway with Variable Speed Signs and Its Simulation Research

Fuzzy Logic Control on Freeway with Variable Speed Signs and Its Simulation Research

Discussions on characteristics of variable-speed pumps controlled by pressure difference

The AC-supply Control Technology of the Variable Speed Constant Frequency Doubly-fed Wind Generator

Investigation of control Strategies for AC Magnetism Variable Speed Constant Frequency Wind Power System

Research on adopting direct torque control for machine in variable-speed and constant-frequency generating system

Study of Electromagnetically Variable Speed for Excavators

Research and Development of a Direct-controlled Hydro-viscous Variable Speed Driver

Spacecraft attitude control using parallel-gimbaled variable speed control moment gyros group

Pitch-controlled System of a Variable-speed and Constant-frequency Wind Turbine

Application Study for Brushless Doubly-fed Machine in the Variable Speed Constant Frequency Generation System

Application Study for Brushless Doubly-fed Machine in the Variable Speed Constant Frequency Generation System

Application of Simulation Model of Variable Frequency Variable Speed System in Experiment Teaching

Variable speed fluid couplings calculate of movement efficiency and analyse of economize on electricity

Friction disc study and working condition analysis for differential hydro-viscous variable speed device

Design of Parallel Ratchet Variable Speed Mechanism and Its Application in

Calculation of Overhaul Period for Bearings in Variable Speed Gearbox of Extruding and Granulating Machine Group

Numerical Simulation and Behavior Analysis of Variable Speed Refrigeration System

Steady-state operating performance of doubly fed variable speed constant frequency wind generation set

Optimized Electric Magnetic Design of Big and Medium Size Inverter-Driven Variable Speed Motor with High Efficiency

Method reforming electromagnetic variable-speed coal feeder to frequency control

Method reforming electromagnetic variable-speed coal feeder to frequency control

Attitude Control of Large Angle Maneuver for Microsatellite Using Variable Speed Control Moment Gyros

A Hybrid Braking Method for an AC Frequency-variable Speed-adjustable System

Harmonic Analysis of the Power Network Caused by the Variable Speed System Driven by Voltage PWM Frequency Converters

Study and Simulation of Vector Control Strategy for Variable-Frequency Variable-Speed Doubly Fed Machines

Synchronous Filter Method for AC Excited Variable Speed Constant Frequency Generators

Modeling and Simulation of Variable-speed Constant- frequency Wind Power Generation System

Application of Variable Speed Adjustment Technology in Long Threads Dacron Winding Machine

Redesign and Analysis of Friction Type Continuously Variable Speed Transmission

Simulation on Hydraulic Pump Controlled Cylinder Rigs Applying Variable Speed Motors

Simulation on Hydraulic Pump Controlled Cylinder Rigs Applying Variable Speed Motors

Field - oriented control of variable speed constant frequency wind generation system

Study of Vector Controlled Variable Frequency Variable Speed PMSM System

Analysis of variable speed operation characters on parallel centrifugal pump groups in pump station

The Application of PLC in the Frequency Variable speed Adjusting System on the Constant Pressure Water Supply System

Control of Variable Speed Constant Frequency for Double-Fed Asynchronous Wind-Driven Generator

Nonlinear Control of Attitude Maneuver for Satellite Using Variable Speed Control Moment Gyros

Doubly Fed Induction Variable-speed Constant-frequency Generator for Wind Turbines System

Frequency-variable speed control for multiple fibre ejectors in the production of continuous strand mats

A Variable Speed System of Permanent Magnet Synchronous Motor With Optimal Current Control by the MR-ILQ Design Method

A Variable Speed System of Permanent Magnet Synchronous Motor With Optimal Current Control by the MR-ILQ Design Method

Integrated Power and Attitude Control of Spacecraft using Variable Speed Control Moment Gyros

Application of constant - filling and variable - speed fluid couplings in belt conveyors

Application of AC frequency variable speed regulation system on large and medium scale cement rotary kilns

Electro- hydraulic Proportional Control System of Wind Turbine Pitch with Variable Speed and Constant Frequency

Implement of Water Supply with Constant Pressure by Fuzzy Controller and Variable Frequency Variable Speed Drive System

variable speed fluid couplings . specification for impeller

Development of New Type Variable Speed Constant Frequency Wind and Water Doubly Drive and Magnetic Power Generator

Electromagnetic Computing and Design Con-sideration for Asynchronous Motor of Variable Frequency Variable Speed

Optimal Design of Dual Stator-winding Induction Generator Operating with Variable Speed

Optimal Design of Dual Stator-winding Induction Generator Operating with Variable Speed

Optimal Control Strategy of Variable-Frequency Variable-Speed Pumps in Urban Water Supply Plants

Research on energy consumption of variable speed chilled water pumps in air-conditioning systems

Design and Application of Digital Boost PFC Circuits for Variable-speed Air-conditioning Systems

Software Compensating Speed Reduction in Variable-speed Pump-control-motor System

The Test and the Measurement Study on a Fan Variable Speed Transmission Flow Distribution System

Technical and Economic Comparison Between Constant and Variable Speed Feed Water Pumps

Notice on application of frequency variable speed regulation technique

Analysis on Service Condition of Hydro- viscous Variable Speed Driver and Fluid Coupling in Power Plant

An Inquiry into the Design Rule of the Variable Speed System of Asymmetrical Mixed Common Ratio

An Inquiry into the Design Rule of the Variable Speed System of Asymmetrical Mixed Common Ratio

AC Excitation Control of Doubly Fed Variable Speed Constant Frequency Wind Power Generator

Analysis of the Excitation System of Variable Speed Constant Frequency Generator

Application of frequency variable speed variable technology in improvement to control system of portal crane

A Novel Variable Speed Constant Frequency Doubly Fed Salient Pole Synchronous Machine

Variable-speed Power System with Inductor Generator for Small Hydropower Station

Analysis on energy saving of variable speed pumps in an open system

the inner wall of the built-in variable speed reaction chamber is provided with guide fins;

Test Method for Skid Resistance Measurements Using the North Carolina State University Variable-Speed Friction Tester

Application of Liquid Variable- Speed Clutches by Changing Viscosity of Liquid in Gas Blowers

Application of Variable Speed Driver to Shiplock Electrical Control System

Technology of Variable-speed Constant Frequency Wind Generating Used AC Machine

Solutions and Design of CNC Forming Equipment Driven by Variable Speed Switch Reluctance

The Computer Control of the Variable Speed Hydraulic Couplings

Anti-Interference Design in Variable Frequency Variable-Speed System

Study on vector control model of variable-speed constant-frequency double-fed wind generator

Design of Hydraulic Elevator System of Variable Speed Control and Closed Oil Circuits Using Energy-saving Cylinder

Modeling and simulation of variable-speed wind generator system with large capacity

Simulation analysis of variable speed pump-control-motor hydraulic system

Model reference adaptive control of variable speed wind turbine generator

Reliability Design of Drive Conical Wheel on Steelball -External Conical Wheel Variable Speed Transmission

Energy-saving variable speed control of chilled and hot water pumps in air conditioning systems

Wind Power Generation System with Variable Speed and Constant-frequency in Wind Power Plant

Using DSP Chip to Realize Real Time Processing of the Tone of Speech with Variable Speed

Application of Variable-speed Regulation Technology in Pump Station

Computer Simulation of Variable Speed Regulation in Diversion of Yellow River

Schneider Electric pursues its global expansion in variable speed drives

MW Variable-speed Constant-frequency Direct-drive Type of Wind-power Unit Technologies

Smooth-Variable Speed Technology of Large Hydroelectric Units

On the Mathematic Model of a Variable Speed Turbo Coupling Based on Curved Surface Fitting

Efficiency Optimization of Variable Frequency Variable Speed Water-supply Pumping Stations Based on Genetic Algorithm

Application of Frequence Conversion Variable Speed in the Controlling System of EPS Accelerator

Operation Analysis of Variable-speed and Constant-speed Pumps in Feedwater System

Simulation of the Pump's Efficiency and Power on Variable Speed Procedure

Experimental research on variable speed operation of cold-hot water unit driven by gas engine

Application of Frequency Variable Speed Regulation in the Control System of Coke Oven Gas Pressuring Machine

Variable-speed feeding mechanism and control system designed of log-core veneer lathe

Control system research of MW variable speed constant frequency wind turbine

Optimization and Energy Saving of Chilled-water Single Variable Speed System

The Changes in Variable Speed Drive Technology for Electrified Railways

Analysis and calculation on energy saving of hydro viscous variable speed clutch

A dynamic model for variable-speed torque converter with adjustable guide blades

The investigation about the applications of variable speed AC drives in electric power industry

Influence of back pressure on the energy efficiency of variable-speed control of pumps and fans

Power Electronic Converters for Variable Speed Wind Turbines

Electric power generation for the variable-speed drive system

Application of Hydro Viscous Variable Speed Drives in Forced Draft Fan of Utility Boiler

Research on the Switched Reluctance Variable Speed Machine System

The Application and Striking Economic Benefit of AC Variable - speed Drives

Research of mathematical model in simulation of variable speed wind turbine

Design of AC Frequency-control Variable-speed Asynchronous Motors

Stability Analysis of Induction Machine PWM Variable Speed System

Applications of Adaptive Control to Variable Speed Wind Turbine System

Variable-speed Controlling Device for Induction Motors

Design of High Efficiency Fan for Large and Medium Inverter-driven Variable Speed Motor

The Research on Control Method of Variable Speed System of Multi-phase Permanent Magnetic Synchronous Motor;

Application of XP Type Infinite Variable Speed Mechanism on Sizing Machine

Control System of Variable-speed Permanent-magnet Generator Directly Driven by Wind Turbine

Research on Characteristic of Variable Speed Feedwater Pump

Sample analysis of variable speed switched reluctance motor

Design of Non-frictional Variable Speed Driver with Continuous Action

Application of modern AC variable speed in marine electric propulsion

Distributed Experiment System of Variable Frequency and Variable Speed

The Characteristic and Matching of Variable Speed Fluid Coupling

Variable Speed Fan Drive System with Airflow Pressure Monitoring

Pitch Control of Variable Speed Constant Frequency Wind Turbines Based on Active-disturbance-rejection Controller

Numerical Control Method of Variable Speed and Isobaric Supply of Air Compressors

Research and Development of Variable-speed and Constant-frequency Wind Power Generation System

Development and Prospect on Variable Speed Technology

A Method of Weakening Harmonic Current in the Asynchronous Motor Variable Speed System