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This paper presents the excitation control of a high speed Switched Reluctance Generator (SRG). The single-pulse control strategy is widely adopted for high speed SRG which discretizes the generator model into a static optimization problem with excitation angles as the control variables. The conventional procedure of finding the optimal excitation angles is divided into two groups, i.e. purely equation-based...
The modular multilevel converter (MMC) mainly run at power frequency (50 or 60Hz) especially in the field of HVDC field. The disadvantage of cell capacitor voltage fluctuation at low frequency blocks the kind of convertor applied at AC motor drive. This paper uses a set of control novel scheme to restrain the fluctuation and make MMC to drive induction motor running from standstill to grid frequency.
Modular Multilevel Converter (MMC) is mainly used in the high frequency field especially in the HVDC system. This contribution presents a control strategy of modular multilevel converter, which allows the converters to feed the three-phase machine from 0Hz to 50Hz. Experiments are provided and the drive system has a good performance.
By now the modular multilevel converter (MMC) is mainly applied to high frequency applications (50 or 60Hz) especially in the field of HVDC systems. This paper presents a control scheme for modular multilevel converter, which allows the converter to operate at continuous coverage in the 0Hz to 50Hz frequency band.
The bridgeless power-factor-correction (PFC) converter possesses higher efficiency than the conventional boost-type PFC converter due to its reduced conduction voltage drop and conduction loss. The conventional multiloop control needs to sense the input current to yield the desired sinusoidal current waveform. This paper presents a control method for bridgeless PFC converter to provide sinusoidal...
This paper proposes a method that can reduce component counts of isolated multiple-input converters. This method can be applied not only to hard-switching converters but also soft-switching converters such as full-bridge (FB) converters. Two types of multiple-input (MI) FB converters that are generalized with a component counts reduction method are also proposed in this paper. Circuit operation, power...
The circuit design and structure of siggle-phase bridge voltage source inverter were presented in detail. The main experimental waveforms were given. The reasons that static error is universally bigger in siggle-phase alternating control systems and the output voltage fluctuation resulted from the load changes were analyzed. The regulator was designed with internal model principe to reduce the static...
This paper deals with the shape control of a cantilever thin plate structure by using laminated piezoelectric actuators (LPA). The shape control equation of the cantilever thin plate partially covered with LPA is derived based on the constitutive relations of the elastic material and piezoelectric material and the thin plate deformation theory. The actuating forces produced by LPA are formulated as...
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