Topics To Be Presented

AC DRIVES

Topics to be presented

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Introduction • An electric motor together with its control equipment and energytransmitting device forms an electric drive. • Two types of electric drives- AC drive and DC drive • When drives are used to control DC motor it is called the DC drive and when it is used to control AC motors it is called the AC drive. [3]

Why to use AC drives? • AC machines have no commutators, hence less maintenance. • AC machines costs and weighs less than the DC machines. • AC machines can work better in hostile conditions

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Construction of an AC induction motor

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Construction of rotor

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Practical approach

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Types of AC Drives

1. Static frequency changers 2. Variable voltage controllers 3. Rectifier inverter systems with natural commutation 4. Rectifier inverter systems with selfcommutation.

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Induction Motor with Cycloconverter

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Induction Motor with variable voltage controller

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Voltage-fed selfcommutated frequency converter

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Conclusion • Now a days the AC drives are used widely • So more sophisticated motor control

strategies can be adopted by the ANN theory. • By ANN intelligent drives can be made by which can take decision for controlling the motor parameters.

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Thank You