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For switched reluctance machines, a major problem is the torque ripple, which causes increased and undesirable acoustic noise and possible irregular speed. This paper aims at determining optimal turn-on and turn-off angles for torque ripple reduction of a three-phase 6/8 switched reluctance motor/generator. A commutation-angle optimization technique is therefore implemented for both motoring and generating...
The torque ripple reduction control of the switched reluctance motor (SRM) is generally implemented by current control, turn-on and turn-off control based on the inductance profile. Turn-off angle control, as a complex relation between motor speed and current, is required for a wide range of operating speeds. However, these methods show limited performance. This paper presents a fuzzy logic turn-off...
The high speed drives are much interested in the industrial applications due to the compact size and high efficiency. This paper presents a torque control scheme using modified TSF(Torque Sharing Function) for the high speed SRM(Switched Reluctance Motor). Because of the short commutating duration in the high speed region, the negative torque from the tail current makes the high torque ripple. In...
This paper offers a new converter for switched reluctance motor (SRM) drive which uses one switch in each phase. One switch for each phase is the least number of switches among the converters used in the switch reluctance motor drive. Also, the proposed converter enjoy from an important characteristic which makes it suitable for high speed drive applications. This is due to the fast phase current...
A novel 3-Level converter configuration for switched reluctance motor is proposed. Using the 3-Level converter, switched reluctance drive has a fast magnetisation and fast demagnetisation to improve dynamic performance and efficiency. Also the proposed converter is suitable for high speed drive application, due to the fast magnetisation and the fast phase current commutation (fast demagnetisation)...
This paper presents an analytical method for calculating the direct- and quadrature-axis inductances of the universal AC commutator motor, suitable for use in design calculations. These inductances are important in understanding the steady-state and transient behaviour, and the commutation. The analysis concentrates on the parameters affecting these inductances, and draws attention to the rarely-mentioned...
A new approach to automatic control of excitation parameters for the switched reluctance motor (SRM) is presented. A turn-on and turn-off angles play important roles in developing electromagnetic torque in SRM. The value of excitation angles are usually variable and depend upon the motor speed and other parameters of the inverter that excites the SRM. As the motor speed increases the shape of the...
Torque ripple and consequent acoustic noise is one of the primary disadvantages of a Switched Reluctance Machine. In this paper a Novel torque ripple minimization technique for switched reluctance motors (SRM) drive is presented. In this method the inductance and its rate of change with rotor position for each motor phase that participate in positive torque production is obtained through simulation...
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