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This paper proposes a method for independent drive of two permanent magnet synchronous motors (PMSMs) fed by a single five-leg inverter (5LI) based on reducing peak current of common leg. The advantages of 5LI are reduced size, volume, reduced number of devices, and increased efficiency due to total lower losses. The conventional method that has been used for controlling two PMSMs sends a large amount...
Based on the existing voltage balancing scheme for two series HV-IGBTs (High voltage insulated gate bipolar transistors) with active clamping and status feedback, this paper focuses on the characteristics of IGBT with active clamping circuit. First, the previous series IGBT model is improved according to the experiment results in order to give accurate feedback signal in the active clamping sub-circuit...
The design of PWM sliding mode control for a novel frequency conversion circuit which called boost matrix converter is presented. The general situation of sliding mode control strategy and frequency converters are firstly introduced. The specific analysis of boost matrix converter and the derivation process of PWM sliding mode controller are clarified afterwards. Finally the system simulation result...
As an ideal power supply, the advanced traction power supply system (ATPSS) is approved to totally remove the neutral sections and promote the power quality, which is a new direction development for traction power supply system. The existing ATPSS based on three-phase to single-phase converter needs to match the step-up transformer. The output current of this system is so heavy that it requires parallel...
Because of high cost of battery, BESS is not suitable for the situation when the demand of active power is less than that of reactive power. A novel STATCOM based on the hybrid cascaded multilevel converter is proposed to provide limited active power support. Meanwhile, this topology doesn't have the drawback of cascaded H-bridge BESS. The characteristic of output power for this topology is studied...
In this paper, a new GaN-based integrated module is designed to solve the problems encountered in the application of GaN devices, such as large parasitic inductance and thermal management problems. The layout of the integrated module is optimized to reduce the parasitic inductance. At the same time, different kinds of substrates are compared and the size of integrated module is studied. Finally, simulation...
The conducted EMI simulation plays an important part in the SMPS in the product design. The analysis of common mode noise is much more complex than differential mode noise. The CE simulation accuracy depends on the accuracy of CM mode noise. CM noises are determined by the electric coupling between the voltage jump point and the ground. Traditional the CM models of the electric coupling between the...
Compared with the conventional buck-boost three-level inverters, the Z-source neutral-point-clamped (NPC) inverters have more simple structure with improved output waveform quality. But the neutral-point potential unbalance problem is still a drawback for their applications. Based on the research of SPWM modulation method and the analysis of the effect of the shoot-through states on the neutral-point...
As the increase of large-scale distributed generation system, the interest in the efficiency of the inverter has been higher. In this paper, the power losses are classified and calculated according to the switching states of the three level NPC inverter and three level T-type inverter. And they are compared with the results from the PSiM thermal module simulation. These power loss comparisons are...
This paper focuses on the modeling and simulation of silicon carbide(SiC) bipolar junction transistor(BJT). SiC BJT is modeled in MATLAB using internal dynamical equation, and the Haar wavelet method is used to solve the ambipolar diffusion equation (ADE). The simulation results of switching waveforms of SiC BJT are given, which verify the validity of this method.
This paper deals with compensation performance of an active load balancer (ALB) with the constant DC capacitor voltage control based strategy under multiple feeders. Instantaneous power flow into the ALB show that the balanced source currents with a unity power factor are obtained on the feeder that is connected to the ALB. Thus the ALB is not over loaded although the constant DC capacitor voltage...
A control method named Active Harmonic Resistance (AHR) using repetitive control technique is proposed to suppress the resonance between the power capacitor and system inductance in power distribution network. Firstly, this paper explains the theory of AHR and its low voltage tracking precision. Secondly, the parameters design and stability analysis of repetitive controller applied in the voltage...
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