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Based on the working conditions and development trend of operating mechanism of high-voltage circuit breaker, this paper presented a high-load adjustment rate of portable high-frequency switching power supply designed for high-voltage circuit breakers test. The main circuit topological structure is analysed in detail, which uses the fullbridge circuit and IGBTs (insulated gate bipolar transistor)...
Multilevel converters have excellent performance in power application, especially in high-power medium voltage fields. To find an effective and general strategy for multilevel and multiphase system is a challenge attracting many researchers. This paper analyses the basic analytical meaning of PWM strategy, which is to implement an analog continuous reference value by means of several available discrete...
The paper investigates the use of neural networks for identification of power converter. A nonparametric model of the AC-to-DC inverter implemented by means of a neural network identifies the inverter dynamics in cases of uncertainty in the input voltage supply and/or load parameter. The circuit consists of a main circuit, control system, together with the source inductance and the output filter....
Through analyzing the shortcomings of the control system on the traditional cutting inverter, this paper presents the double close loop control system based on pole assignment for cutting inverter, which based on phase shift full bridge zero voltage switched (PS-FB-ZVS). This paper builds the small signal mode of PS-FB-ZVS PWM converter, and assigns the double close loop PI parameters by pole assignment...
Based on control type soft switching, an interleaved three-phase bidirectional DC/DC converter for high voltage high power applications is presented. The converter main circuit uses the interleaved three-phase bidirectional DC/DC topology and takes use of the three-phase complementary PWM control to implement soft switching condition. The circuit principles, the working modes and control type soft...
Speed control of salient pole permanent magnet synchronous motor (PMSM) is studied based on energy-shaping and port-controlled Hamiltonian (PCH) system theory. Firstly, the PCH speed control model of PMSM is established. Secondly, the desired equilibrium point of the system is obtained based on maximum torque per ampere (MTPA) control principle. Then the speed controllers are designed when the load...
In this paper, a digital and analog hybrid control of multiphase power-modules with low output-voltage and high output-current are presented. The topology of each power module is a current-fed push-pull converter. The front stage is a buck converter which is used to regulate the output voltage and the rear stage is a push-pull converter with the electrical isolation and voltage step-down function...
Instantaneous values of input line-to-line voltages control method is one of the important control strategies for matrix converter. By using this control method the compensation of the asymmetrical input source voltages is easily achieved. However, many researchers focus on pursing a new control strategy for this method due to the complexity of the previous control strategy and difficulty of its realization...
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