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Variable Frequency Drive - Variable Frequency Drives - Variable Speed Drives - Vent Energy Operator Sp. z o. o. - VERGNET S.A - Vista Eco Solutions - Vertical Wind Turbine Technologies, Llc -

Variable Frequency Drive

Every variable frequency drive (VFD) on the market has an input rectifier. Every variable frequency drive on the market creates harmonic currents. Active rectifiers are used in active front end VFD drives to reduce the harmonic currents with the emphasis on reduce, not eliminate. Almost every variable frequency drive uses switching elements in the output to create a PWM output pattern that causes a sinusoidal current to flow in the AC motor. As such, the potential for EMC and EDM is high with all variable frequency drives. Before you argue the merits of variable frequency drives (VFD), you need to get a better understanding of some of the fundamentals that we are referring to.

Business type: manufacturer, wholesale supplier, exporter, electric utility
Product types: wind energy system components (large), energy efficient appliances, energy efficient homes and buildings, packaged power systems, power conversion equipment, water pumps.
Service types: installation, engineering, project development services, maintenance and repair services
Address: 1536 Kebet Way, Port Coquitlam, British Columbia, Canada V3C 5M5
Telephone: 604-421-2620
Web Site: http://www.variablefrequencydrive.org
E-mail: Send Email to Variable Frequency Drive

Variable Frequency Drives

In HVAC variable frequency drives add energy efficiency and precise control for fans and pumps. The variable frequency drives offer demand control for airflow and water in chilled water systems, hot water systems, and air handling systems. Variable frequency drives require inverter duty motors and variable frequency drives can be purchased for three phase and single phase applications although the vast majority of variable frequency drives are used in commercial three phase applications. Electrical system â�" if variable frequency drive >25% of load, must take steps to mitigate; Frequent/constant running at full speed decreases efficiency and life of variable frequency drive; Alternative/Innovative Uses of variable frequency drives; Use to ...

Business type: manufacturer, exporter, electric utility
Product types: air cooling system components, energy efficient appliances, home automation, waste to energy systems, wind power plants, hybrid power systems.
Service types: installation, engineering
Address: Wattle Street Asquith NSW, NSW, Austria 2077
Telephone: +61 2 9113 0618
Web Site: http://www.vfds.org/
E-mail: Send Email to Variable Frequency Drives

Variable Speed Drives

Variable speed drives are ONLY for 3 phase motors, any method to speed control an induction motor. Variable speed drive with ONLY single phase input can drive capacitor start/run single phase motors. Variable speed drive operating from single phase have output voltage on each phase equal to input voltage. Higher capacity single phase motors with separate high torque/high current starting winding operated by centrifugal switch can not be used with variable speed drive. However a triac speed controller may work, as this could duty cycle the AC sine wave form. Try an off the shelf light dimmer and see if this can control the desired speed range of the fans. If this works, then some circuit research/lab work could produce a circuit that takes 0...

Business type: manufacturer, wholesale supplier, exporter
Product types: home automation, power conversion equipment, power conditioning equipment components, wind power plants, water pumps, energy efficient appliances.
Service types: consulting, installation, engineering
Address: No. 2 Xuwu Village Xixiang baishi, Bao'an District, Shenzhen, Guangdong China 518000
Telephone: +8675528480241
Web Site: http://www.vsdrive.com
E-mail: Send Email to Variable Speed Drives

Vent Energy Operator Sp. z o. o.

We are in charge of turn key solutions for wind farms/turbines from idea-2-running wind turbine/farm and after with whole maintenance/repairs for small and large wind turbines. Main activity is in Poland, but we are open to other markets.

Business type: exporter, importer, distributor
Product types: wind turbines (large), wind turbines (small), wind power plants, Wind turbines monitoring systems SCADA.
Service types: consulting, installation, construction, project development services, research services, site survey and assessment services, contractor services, maintenance and repair services
Address: Tymienieckiego 20, Lodz, Lodz Poland 90-347
Telephone: +48-42-236-7565
FAX: +48-42-663-9653
Web Site: http://www.veo24.eu
E-mail: Send Email to Vent Energy Operator Sp. z o. o.

VERGNET S.A

Vergnet is one of the world's leading manufacturer of handpumps and wind generators. It is your partner in water and energy for isolated or rural areas.

Business type: manufacturer, engineering
Product types: wind energy systems (large), wind energy systems (small), wind turbines from 5 to 275 kW (diameter from 5 to 32 m), water pumping systems, water pumps.
Address: 160 rue des Sables de Sary, 45770 Saran., France
Telephone: +33 2 38523970
FAX: +33 2 38523583
Web Site: http://www.vergnet.fr
E-mail: Send Email to VERGNET S.A

Vista Eco Solutions

Vista Eco Solutions offers energy efficient and water management solutions through various quality solar and wind products to residential and commercial customers. Vista Eco Solutions provides the latest technologies in solar thermal water heating systems, water desalination and treatment, solar photovoltaic energy systems for rooftops, solar parks and street lighting. Vista Eco Solutions is the authorized distributor in UAE, Qatar, Saudi Arabia and Oman of Austrian Gasokol GmbH and Energetica Energietechnik GmbH, Italian Sile S. p. A and CMG Solari and German Mage Water Management GmbH . We provide the state-of-the-art solar and wind products and the highest quality of full service turnkey projects including; planning, design, installatio....

Business type: distributor
Product types: photovoltaic systems, solar water heating systems, solar thermal energy, solar pool heating systems, solar street lighting & LED, wind turbines (small), Solar Thermal Desalination.
Service types: consulting, design, installation, construction, engineering, project development services, contractor services
Address: Regus Building, D- Ring Road, P. O. Box 32522, Doha, Qatar
Telephone: +974 4423 1233
FAX: +974 4423 1100
Web Site: http://www.vista-eco.com
E-mail: Send Email to Vista Eco Solutions

Vertical Wind Turbine Technologies, Llc

Business type: energy
Product types: wind energy systems (large), wind turbines (small), wind energy towers and structures (large), wind energy towers and structures (large), hydro energy system components (large), hydroelectric turbines (large).
Service types: project development services, research services
Address: P.O. Box 4577, Hilo, Hawaii USA 96720
Telephone: 808-934-0803 or 352 795 1988
FAX: 352 795 1988

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