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This study investigates the speed control of single-phase induction motor capacitor starting using an experimental work and simulation. Single phase induction motors are simple, robust and reliable and are used in enormous numbers especially in domestic and commercial application where 3phase supplies are not available. The laboratory work has been done and the results show performance of the motor...
The full simulation and modeling of ECM for HVAC systems is an obligation to understand the EMI problem occurring in the units. From the drive of an efficient model development of the ECM for HVAC system, a new hierarchical model proposed. This model includes simulation model, standards description, and experimental results. Estimation of conducted EMI by using computer simulation in advance gives...
Mostly, the conventional neutral point clamped (NPC)multilevel inverters are implemented for odd number of levels in the output. In this paper, four level NPC inverter is implemented and compared with the nested neutral point clamped (NNPC) inverter. The NNPC inverter is a four level inverter for high power applications. This inverter is a combination of diode clamped and flying capacitor multilevel...
This paper studies a regenerative cascaded multilevel converter that substitutes active front ends for the diode-based front ends only in part of cells, and proposes a power tracking control strategy that does not need any motor parameters. During the induction motor's deceleration, by controlling the two kinds of cells' output voltages according to the motor's power factor angle, the converter makes...
The Single Phase Induction Motor (SPIM) is known for its simplicity and convenience. It is most commonly used in homes, businesses and small industries. One of the most known advantages of the SPIM is that they require a single phase to maintain the motor in motion. The only drawback is that due to the lack of starting torque, an additional auxiliary winding is required to start the motor. This increases...
Because of the increasing pressure for improved the efficiency single-phase motor, a novel single-phase induction motor with three winding in series and two capacitors has been provided to be capable of high efficiency demand. This paper introduces the basic structure and operational principle of the new type motor. A voltage source driving complex finite element model for the novel high efficiency...
When feeding an induction motor by a PWM-inverter through long cables, reflections occur and overvoltages may arise. Using a terminator in parallel with the motor, the overvoltages are reduced. An analytical calculation of the motor voltage is obtained using transmission line theory. Simulations and measurements allow to verify the results.
Current source inverter (CSI-fed induction motor drives are commonly used for high power applications without necessity to fast dynamic response. Although these kind of drives are more economic in high power ratings, they have some inherent disadvantages, that limit their applications. In this paper, in addition to presenting vector control system of CSI-fed induction motor drives, a novel method...
A novel topology of a double two-phase machine drive system is proposed. It is shown that by connecting the neutral lines of a two-phase permanent magnet machine (TPPM) and a two-phase induction machine (TPIM), only four switches need to be used for each machine and the two machines share one set capacitors. This paper develops the mathematical model of this system and establishes the simulation model...
The control scheme is presented to aim at the speed control of single phase induction motor. It consists of fuzzy controller, two tracking differentiators, and speed estimator. At first, The design of rotor speed estimator is carried on, which the rotor speed can be obtained according to the general mathematic model of single phase induction motor and rotor estimating speed be used instead of rotor...
A double two-phase induction motor (DTPIM) system is proposed. It is shown that by connecting the neutral lines of a pair of two-phase machines, only four switches need be used for each machine and the two machines share one set capacitors. This paper develops the mathematical model of this system and establishes the simulation model accordingly. Simulation results are given to demonstrate the feasibility...
This paper proposes an overmodulation method for improving the voltage utilization of NPC type 3-level inverter for traction drives. The conventional railway vehicle has used a vector control to MI=0.907 and a slip-frequency control from MI=0.907 to the six-step mode. The slip-frequency control has less output torque dynamics than the vector control. In this paper, the linear region of NPC type 3-level...
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