Wind Energy Maintenance and Repair Businesses in China

Chongqing Hydropower Equipment Co., Ltd - Frequency Converter - Shenzhen TIMAR windenergy and luminous energy Technology Co., Ltd - Variable Speed Drives -

Chongqing Hydropower Equipment Co., Ltd

Chongqing Hydropower Equipment Co., Ltd(CHPE) is engaged in renewable energy. CHPE is a manufacturer and exporter of water turbine-generator and accessories. Also, CHPE is a consultant, contractor and developer of hydro electric project, wind power plant and photovoltaic system.

Frequency Converter

Frequency converter use rectifiers to convert ac power line electricity into direct current. Then inductor-capacitor filters smooth its waveforms and pulse-width-modulation inverters turn it into shaped ac power with a frequency of 2 to 12 Hz. This output is used to drive motors for constant torque or (with the help of encoders) to control motor speed. frequency converters are proliferating, as they save substantial amounts of energy during motor operation â" an objective of increasing importance. Some frequency converters have built-in ac and dc brake functions to help transform kinetic energy from the application into braking power.

Shenzhen TIMAR windenergy and luminous energy Technology Co., Ltd

As a scientific and technological innovation-oriented enterprise, TIMAR technology is a maglev wind turbine system that integration research & development manufacturing sales engineering and services for high-tech enterprises. TIMAR technology research team under the leadership of the Chairman Mr. Lin Wenqi after seven years of arduous efforts, through repeated failures and continuous improvement, and finally developed the world's first maglev wind turbine, Completion or the international small and medium sized wind power technology milestone leap. TIMAR technology has a number of independent intellectual property rights and proprietary technology, and have completed a number of international testing and certification. TIMAR technology ha. ...

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...

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