This series is transformerless and has a wide range of MPPT input voltage. The maximum conversion efficiency and MPPT tracking accuracy reach 97.6 % and 99.5 % respectively. The maximum DC voltage reaches 580 V. The 2.5 kW to 5 kW inverters have 2 string MPP trackers, which maximizes flexibility and system efficiency.
This model equipts with high efficiency charge and discharge controlling, over current protection. 2) Direct current output a. Four plug contacts of DC12V / 30A output, could be used for lamp fan refrigerator, etc. b. With DC9V / 30A and DC5.5V / 500mA output, could be used to charge cell phone, digital camera, music players, etc.
Zhejiang Master Injection System Co., Ltd (Zhejiang Riffle Auto parts .Co.Ltd) is specializing in producing high standard quality of electric fuel pump and fuel pump assembly . working with the world 500 fortunes to grwo very fast because of high guranteed quality and efficient service .
Guangzhou Aolait Lighting Co., Ltd is a professional stage lighting enterprise with integration of Research and development, production, sales and service. Main products range from intelligent moving head light series, led lighting series and accessories for stage equipment.
"CCTVMAN started in 2009, is a professional CCTV security products manufacturer and a widely well recognized CCTV products supplier in China.
Over the past years, we have built up a strong technical team; process strictly controlled production lines, responsible and rapid response before and after sales technical support team. And all of our teams are under the leadership of our open-minded managing leaders.
NHI, was founded in 2007. NHI is located in Shenyang, the center city of Chinese heavy industry and capital city of Liaoning Province. NHI consists of five large state-owned enterprises. As one of the Chinese EPC companies, NHI has developed rapidly in recent years. NHI has total assets of 12.7 billion yuan. NHI has a workforce of 11000 employees, a land occupation area of 1.3 million square meters and more than 5000 sets of various processing equipment.
SunLike Energy mainly produce friendly Rechargeable AGM Sealed Lead Acid Batteries, Solar GEL Batteries, OPzV Battery, Deep Cycle batteries, VRLA battery, Telecom Batteries and provide other Solar related products such as Solar inverter, Solar charger controller, All batteries are widely used in solar, wind power, ups, power station, telecommunication, inverter system, golf cart, electric vehicles and emergency&security; system.
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Shenzhen herifi Tech, the professional manufacturer in grow light and aquarium light. 200 workers, 2000 square meters workshop, 10 years experience senior engineer, a perfect team, making us provide best service to every customer. Mutual profit and win-win partner relationship is our goal. Now our products have been sold to more than 43 countries such as USA, UK, Spain, Holland, Japan, Italy etc. And designing new grow light just need two weeks. Thus choose us and make success.
I don't think the question was about changing the 50Hz/60Hz frequency, but rather about changing the voltage from 480v to 380v, 400v, which is what the 60Hz to 50Hz converter normally would do. Why should we include the extra complications of changing frequency from 60Hz to 50Hz before the transformer, and back again after the transformer?
VFD (Inverter) converts AC power to DC power, the DC power is switched with either IGBT or Thyristor to construct a quasi-sinusoidal waveform. This is done by pulse-width-modulation (PWM). The PWM changes the voltage level and duration. IGBTs are the most common switches used in VFDs. IGBT has a mosfet driver, it can be controlled at high speeds. Thyristors or (SCR) gate are held on until the current crosses near zero. Actually, the dc is never converted back to ac.
Use GoHz frequency converter in motor. Rotor is of special made. Stator winding is designed to maintain 3-phase and use a capacitor in between two phase and output will be 3-phase. We had designed in my previous company such a 1-phase to 3-phase frequency converter. These converter are used in locomotives.
Yueqing Sandi Electric Co., Ltd specialized in the new energy source and electrical source scientific research, development, manufacture and service had surpasses for 15 years of electrical source field; which recognized by widely customers according to entirely varieties, high quality and service first. At present, the researched products by our company basically contain the best product at home and abroad, which delegated the top level of electrical source manufacture all over the world.