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This paper presents Indirect Matrix Converter(IMC) with improved control supplying power to different loads at different frequencies. An improved switching technique is used at the input stage of this proposed IMC so that a higher dc voltage is obtained compared to the IMC with conventional control. The fundamental input current is at unity power factor for all operating conditions. In this IMC, the...
Inclusion of renewable energy resources in the energy mix is one of the fastest growing trends in both developing and industrialized societies to reduce dependency on fossil fuels and other non-renewable resources. This work proposes the design of solar assisted motor drive that can be used with single-phase (1φ) or three-phase (3φ) induction motors with a soft phase conversion without requiring a...
The direct matrix converter has been regarded as a promising AC/AC conversion topology and it is being researched. Motor drives are one of the main potential applications of the matrix converter. This paper carries forward the application of matrix converters in AC motor drives using direct torque control (DTC). In the common DTC scheme for the matrix converter, two vectors with the maximum amplitudes...
This paper proposes novel and simple method of fault-tolerant control of induction motor supplied by a two-level voltage source inverter. The inverter, after the open transistor fault, is reconfigured — the faulted phase is connected to the neutral point of DC link capacitors. The control method is based on sliding mode concept and allows to obtain robust control of motor torque. It does not require...
This research presented multilevel inverter using cascade transformers to supply the output voltage levels which are used to control speed of asymmetrical two-phase induction motor. Two sets of full bridge inverters and transformer with difference of number of turn ratio are combined to generate the voltage levels to supply each winding of asymmetrical two-phase induction motor. Triangular multicarrier...
Silicon Carbide (SiC) MOSFETs, as wide-bandgap semiconductor device, has capability to switch at much higher frequency in comparison with their silicon (Si) counterparts. Industrial motor drive is usually connected to induction motor with long shielded cable. This long shielded cable introduces parasitics such as stray inductance and capacitance to the system, which affects SiC MOSFETs performance...
This paper discusses the possibility of providing voltage control-based ancillary services using thermostatically controlled loads (TCLs). The idea is to change the voltage at the point of common coupling in order to control power consumption of the TCLs through time. This allows to utilize the most common type of loads in the grid to provide ancillary services. These services differ from usual demand...
In this paper, the simulation of dynamic model of Linear induction Motor (LIM) using Model predictive control (MPC) is presented. Various control methods have been previously proposed for the control of three phase two level inverter. A Model Predictive Control method is a simple and powerful control scheme used for the control of voltage of a three-phase inverter. A discrete time model of the inverter,...
A microcontroller-based AC voltage regulator for single-phase induction motors, using asymmetrical pulse width modulation (PWM) and fuzzy logic is proposed. The optimal switching angles are computed in real-time, using a nine-rule fuzzy system, with the objective to correct the phase difference between the output voltage and current. The voltage controller achieves an almost linear response and the...
This paper presents the design of a cost-effective and efficient solar powered irrigation pump utilizing a switched reluctance motor (SRM). It utilizes a simple DC-DC boost converter as a power conditioning stage between SPV array and the motor drive. The control of solar photovoltaic (SPV) array output power at maximum power point (MPP) and facilitating the soft-starting to the SRM drive, are two...
This paper describes a detailed operation analysis, proposed dc side control strategy, and implementation of the BQ-ZSI (bidirectional quasi-Z-source inverter) for electric vehicle applications. The power flow can be bidirectional by connecting an active switch antiparallel with the diode in BQ-ZSI. The performance of the inverter under load variation can be improved by inserting an inner current...
This paper proposes the extending application of permanent magnet synchronous machines (PMSMs) without damping windings, or non-line-start PMSMs (NLSPMSMs) to achieve effective soft start and synchronous switching from inverter drive to grid drive. The system electromechanical model during switching is deduced, and numerical analysis is adopted to verify the stability under grid drive. For the control...
This research is design and construct of Sine Pulse Width Modulation (SPWM) 4-leg voltage source inverter for controlling speed of asymmetrical two-phase induction motor. The Sine PWM switching signal is generated by ARM7 (Adu7024) microcontroller which is programmable and cheap, while having high frequency to generating switching signal. Two ICs No. IR2130 are used for motor driving part. The characteristics...
This research is design and construct of Sine Pulse Width Modulation (SPWM) 3-leg voltage source inverter for controlling speed of asymmetrical two-phase induction motor. ICs No. IRF2130 are used for motor driving part. The characteristics of output current signal are nearly closed to sinusoidal pattern, so that low harmonics and high efficiency for motor control are obtained. The Sine PWM switching...
This paper proposes a hybrid seventeen-level induction motor drive with a single DC-link fed from a five-level active front-end converter connected to the utility grid. The five-level active front-end draws power from the grid at unity power factor and feeds a seventeen level induction motor drive. Both the grid side inverter (five-level) and the load side inverter (seventeen-level) are realized by...
This paper presents a implementation of Z-source inverter system and speed control for induction motor drives. The Z-source inverter system is a single stage converter. By controlling the shoot-through duty cycle, the Z-source network can boost the capacitor DC voltage. Which is greater than the input DC voltage. As a result, the new Z-source inverter system provides ride-through capability during...
Multi-inverter and multiphase power electronic installations have additional degrees of freedom for construction of system topology, and for the choice of modulation schemes and algorithms for control of inverters in these systems. It has been shown, that in combined six-phase drives on the basis of two standard inverters and two neutral-point-clamped converters symbiosis of specialized control schemes...
In this paper, the switching strategy based on hysteresis current controllers for a three-phase to two-phase matrix converter based on two-leg configuration is presented. Comparing the actual output currents with the reference signals and digitizing the errors by hysteresis controllers caused to determine which of the phase voltages at input must be connected to each output ac loads. The advantages...
This paper discusses an uninterrupted power supply (UPS) with a flywheel and a matrix converter using a direct grid connection. A flywheel type UPS has a problem where a standby power is bigger than that of the battery or EDLC type UPS. To solve this problem, an operation known as direct grid connection mode is proposed, where a matrix converter is the interface converter between the flywheel and...
This paper presents the experimental results of the independent drives of two induction motors (IMs) fed by a four-leg inverter with vector control method. The inverter consists of four legs and two capacitors connected in a series. Recently the four-leg inverter and four switch inverter have been studied, but they have several disadvantages. First, the balanced three-phase current cannot be obtained...
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