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Trademark
SHENZHEN INVT Electrical CO. | Date: 2012-04-30

Battery charge devices; Battery chargers; Commutators; Computer software to maintain and operate computer system; Converters; Data processors; Electrical distribution boxes; Electricity distribution consoles; Industrial automation controls; Inverters; Lightning arresters; Meteorological instruments; Photovoltaic inverters; Solar batteries.


Trademark
Shenzhen INVT Electrical Co. | Date: 2011-06-28

Automated process control system, namely, micro-processor based hardware and software used to monitor the status of power generation and electrical distribution in power stations; explosion-proof frequency converters for use in high voltage environments; electric control panels; electric distribution boxes and consoles; commutators; electric converters; electric switches; inverters; voltage stabilizing power supply; low-voltage electrical power supplies; autotransformers.


Zhao Z.,Nanjing Southeast University | Zhao J.,Nanjing Southeast University | Shen K.,Nanjing Southeast University | Peng Z.,Shenzhen Invt Electrical Co. | Zhang B.,Shenzhen Invt Electrical Co.
Zhongguo Dianji Gongcheng Xuebao/Proceedings of the Chinese Society of Electrical Engineering | Year: 2014

The multilevel converter has been widely studied due to its excellent performances, but a diode-clamped converter suffers DC-capacitor voltage imbalance problem. The effect of nearest three vector SVM method based on objective function optimization is restricted by modulation index and power factor. A DC-capacitor voltage balancing method for a five-level diode-clamped converter (5L-DCC) with high modulation index and high power factor was proposed, the algorithm took advantage of the six effective vectors of the inner hexagon, and the problem of DC-capacitor voltage balancing is restricted by power factor of 5L-DCC was resolved, the simulation and experimental results show that the method proposed is effective and has good performance. © 2014 Chin. Soc. for Elec. Eng.


Zhao Z.,Nanjing Southeast University | Zhao J.,Nanjing Southeast University | Shen K.,Nanjing Southeast University | Peng Z.,Shenzhen Invt Electrical Co. | Zhang B.,Shenzhen Invt Electrical Co.
Diangong Jishu Xuebao/Transactions of China Electrotechnical Society | Year: 2014

Due to the various advantages compared with three-level converter, the five-level diode-clamped converter (5L-DCC) is widely studied. This paper focuses on the DC-capacitor voltage balancing and vector sequences switch mechanism of a space vector modulation (SVM) modulated 5L-DCC as modulation index is less 0.5. The 5L-DCC voltage balancing strategy based on objective function optimization is analyzed. On the basis of seven segment and five segment vector sequences, this paper comes to two vector sequences selection rules according to reference vector location. The DC-capacitor voltage balancing and narrow pulse problems are solved. The simulation and experimental results show that the proposed method is effective and capacitor voltage ripple is low.


Trademark
Shenzhen INVT Electrical Co. | Date: 2012-10-24

Kitchen machines, electric; agricultural machines; sewing machines; washing machines; food preparation machines, electromechanical; elevators (lifts); metalworking machines; hand-held tools, other than hand-operated; electron industry equipment; machine transmission device; power engines (not for land vehicles); gear boxes other than for land vehicles; control devices for machine engines; starters for motors and engines; generators of electricity; driving motors other than for land vehicles; propulsion mechanisms other than for land vehicles; exhausts for motors and engines; gears, other than for land vehicles; pumps (parts of machines, engines or motors); servomotor; dynamo belts; couplings other than for land vehicles; electric spindles (machine parts); spindle motors; elevator operating apparatus; threading machines; lathes (machine tools); cutting machines; finishing machines; notchers (machine tools); machine tools; crushing machines; machines and apparatus for polishing (electric); drill presses; boring lathes; electric planers; electroplating machines; electric welding apparatus; electric door openers. Data processing apparatus; computer programs (downloadable software); electronic tags for goods; bells (signal); telephone apparatus; optical communication instrument; measuring instruments; radiological apparatus for industrial purposes; protection devices for personal use against accidents; theft prevention installations, electric; punch clocks; television apparatus; cameras (photography); material for electricity mains (wires, cables); integrated circuits; eyeglasses; electrolysers; power battery; accumulator boxes; chargers for electric batteries; variometers; capacitors; resistances, electric; rheostats; transformers (electricity); inverters (electricity); switches, electric; lightning arresters. Vehicles for locomotion by land, air, water or rail; cars; cycle cars; bicycle stands; cable transport apparatus and installations; baby carriages; omnibuses; vehicle tyres; air vehicles; boats; traction engines; gearing for land vehicles; driving motors for land vehicles; propulsion mechanisms for land vehicles; land vehicle power engines; buffers for railway rolling stock; gear boxes for land vehicles; electric tail plates (land vehicle parts); motor vehicles.

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