Control of Non-conventional Synchronous Motors

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Electrical motors are an electro-mechanical device that converts electrical energy to mechanical energy. Based on the type of input we have classified it into single phase and 3 phase motors. The most common type of 3 phase motors are synchronous motors and induction motors. When three-phase electric conductors are placed in certain geometrical positions i. The rotating magnetic field rotates at a certain speed known as the synchronous speed.

If an electromagnet is present in this rotating magnetic field , the electromagnet is magnetically locked with this rotating magnetic field and rotates with the same speed of rotating field. This is where the term synchronous motor comes from, as the speed of the rotor of the motor is the same as the rotating magnetic field. It is a fixed speed motor because it has only one speed, which is synchronous speed. This speed is synchronised with the supply frequency.

The synchronous speed is given by:. Usually, its construction is almost similar to that of a 3 phase induction motor, except the fact that here we supply DC to the rotor, the reason of which we shall explain later. Now, let us first go through the basic construction of this type of motor. From the above picture, it is clear that how do we design this type of machine. Transposition of the study to the case of a negative rotational speed 28 1. Variant of the base assembly 28 1. Conclusion 29 1. List of the main symbols used 29 1. Bibliography 30 Chapter 2. Introduction 33 2. Choice of the expression of Nk 35 2.

Expression of fluxes 40 2. Electrical dynamic equations 48 2.

Control of Synchronous Motors – ISTE Editions

Expression of electromechanical variables 51 2. Expression of torque 53 2. Writing of equations in terms of coenergy 54 2. Application to control 56 2.

Control of Synchronous Motors

Conclusion 60 2. Appendix 4: List of the main symbols used in Chapters 1 and 2 63 2. Bibliography 65 Chapter 3. General introduction 67 3. Analysis of the main causes of failure 68 3.

Description

Reliability of a permanent magnet synchronous motors drive 72 3. Conclusion 76 3. Optimal supplies of permanent magnet synchronous machines in the presence of faults 77 3.


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Supplies of faulty synchronous machines with non-sinusoidal back electromagnetic force 77 3. Experimental learning strategy in closed loop to obtain optimal currents in all cases 3. Simulation results 3. General conclusion 3.

Glossary 3. Bibliography Chapter 4. Introduction 4. Description of the electrical actuator 4. Basic equations 4. Dynamic models of the double-star synchronous machine 4.

Construction of Synchronous Motor

Control of the double-star synchronous machine 4. Bibliography Chapter 5. Introduction and presentation of the electrical machines 5. Control model of inverter-fed permanent magnet synchronous machines 5. Torque control of multiphase machines 5. Modeling and torque control of multiphase machines in degraded supply mode 5. Bibliography Chapter 6. Description 6. Modeling with the aim of control 6. Control by model inversion 6.

Overspeed and flux weakening of synchronous machines 6. Conclusion 6. Bibliography Chapter 7. Introduction 7.

Mathematical Problems in Engineering

Classical control of linear motors 7. Advanced control of linear motors 7. Conclusion 7.

Jean-Paul Louis

Nomenclature 7. Acknowledgment 7. Bibliography 7. Introduction 8.

What is FOC? (Field Oriented Control) And why you should use it! -- BLDC Motor

Synchronous reluctance machines 8. Switched reluctance machines 8. Conclusion 8. Bibliography Chapter 9.