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This paper proposes a new voltage control technique for IPMSM drives to extend DC-link voltage utilization for flux weakening operation. The presented method does not require look-up-table and motor parameter for flux weakening operation. The difference between the switching period and summation of active switching times for PWM control of inverter is used to modify the d-axis current reference under...
Open-end winding variable speed drives with dual-inverter supply have been extensively investigated for various applications, including series hybrid powertrains and propulsion motors. The existing body of work is restricted to the three-phase electric machinery. This paper looks at the possibility of using machines with higher phase numbers in an open-end winding configuration with dual multiphase...
The circuit of DSTATCOM is analyzed. The dynamic model of DSTATCOM based on three-level voltage inverter is established by way of lead-in switch function. Control method of DSTATCOM is focal point of this research. The dissertation determines the detection means based on instantaneous reactive power. PWM control by tracking the current technology achieve to direct control. The simulating results prove...
In this paper, four PWM control methods: simple boost, maximum boost, maximum constant boost, and modified space vector PWM control are reviewed and compared for different voltage type Impedance Source Inverter (ZSI) topologies. There are three different topologies for three phase-two level-voltage type ZSI: basic, bidirectional, and high performance ZSI. For purposes of comparison, these three ZSI...
This paper develops the dynamic mathematical model of the rectifier and inverter side controllers for a Voltage Sourced Converter (VSC) based high voltage DC (VSC-HVDC) link employing Insulated Gate Bipolar Transistor (IGBT) with PWM control. The controller derived using instantaneous power theory, parks transformation, and similarity transformation is expected to maintain the dc link voltage and...
A novel sensorless control for switched reluctance motor (SRM) driven by the three-phase full-bridge inverter is proposed. The most commonly used drive for SRM is the asymmetric half-bridge inverter but its main disadvantage is the cost due to the number of switches and diodes required to realized the drive, in comparison with the much cheaper and more widely available three-phase full-bridge inverter...
This paper proposes a new three-phase inverter for UPS application. The control of the proposed inverter is based on circuit-level decoupling (Salmon, 1996 and Qiao and Smedley, 1999) instead of d/q conversion; it's implemented by appropriate logic circuitry in combination with a control-core and a PID compensator. The control-core can be implemented by one-cycle controller (OCC), pulse-width modulation...
B-SIT has an advantage that its on-resistance is extremely low compared to those of other power semiconductor switching devices. Accordingly, we can suppress its conduction losses during large current operation. Then, high conversion efficiency is expected when B-SITs are utilized as the switching devices of high frequency inverters. Here, we adopt newly developed B-SITs which have the maximum ratings...
B-SIT has an advantage that its on-resistance is extremely low compared to those of other power semiconductor switching devices. Accordingly, we can suppress its conduction losses during large current operation. Then, high conversion efficiency is expected when B-SITs are utilized as the switching devices of high frequency inverters. Here, we adopt newly developed B-SITs which have the maximum ratings...
A control method is proposed that prevents easy tripping of induction motor inverters, even when their load is varied suddenly. A PWM control method is used in which an asynchronized mode is changed to a synchronized mode on the basis of a modulation ratio. A motor torque control approach is used, in which inverter output voltage and frequency are controlled by effective and reactive currents. Experimental...
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