By Jean Claude Alacoque
Clear presentation of a brand new keep an eye on approach utilized to induction computer (IM), floor fastened everlasting magnet synchronous motor (SMPM-SM) and inside everlasting magnet synchronous motor (IPM-SM)
Direct Eigen regulate for Induction Machines and Synchronous Motors offers a transparent and consise clarification of a brand new strategy in alternating present (AC) motor keep an eye on. in contrast to comparable books out there, it doesn't current quite a few keep an eye on algorithms for every kind of AC motor yet explains one technique designed to manage all AC motor forms: Induction desktop (IM), floor fixed everlasting Magnet Synchronous Motor (SMPM-SM) (i.e. Brushless) and inside everlasting Magnet Synchronous Motor (IPM-SM). this absolutely new regulate technique can be utilized not just for AC motor keep an eye on but in addition to manage enter filter out present and voltage of an inverter feeding an AC motor.
- Accessible and transparent, describes a brand new speedy form of motor keep an eye on utilized to induction computing device (IM), floor fastened everlasting magnet synchronous motor (SM-PMSM) and inside everlasting magnet synchronous motor (I-PMSM) with quite a few examples
- Summarizes a style that supersedes the 2 identified direct regulate recommendations – Direct Self keep an eye on and Direct Torque keep watch over – for use for AC motor regulate and to manage enter filter out present and voltage of an inverter feeding an AC motor
- Presents complete simulations which are effortless for the reader to breed on a working laptop or computer. A control application is hosted on a significant other website
This publication is straight-forward with transparent mathematical description. It offers simulations in a manner that's effortless to appreciate and to breed on a working laptop or computer, when omitting info of functional implementation of keep an eye on, to ensure that the most idea to take concentration. The booklet is still concise through leaving out description of sensorless controls for all motor varieties. The sections on “Control Process”, “Real Time Implementation” and “Kalman clear out Observer and Prediction” within the introductory chapters clarify the way to virtually enforce, in actual time, the discretized regulate with all 3 varieties of AC automobiles. so as, this ebook describes induction laptop, SMPM-SM, IPM-SM, and, software to LC filter out barriers. The appendixes current: PWM vector calculations; move matrix calculation; move matrix inversion; Eigen country area vector calculation; and, transition and command matrix calculation.
Essential examining for Researchers within the box of force keep an eye on; graduate and post-graduate scholars learning electrical machines; electrical engineers within the box of railways, electrical autos, aircraft floor regulate, army functions. The technique is additionally helpful for Engineers within the box of computer instruments, robots and rolling mills.
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Additional resources for Direct Eigen Control for Induction Machines and Synchronous Motors
93) in the following section, and we will calculate the control vector. e. the state-space vector of which coordinates are defined in the eigenvector basis, relative to eigenvalues of the evolution matrix of a motor controlled by a voltage inverter. 1 Discretized State-Space Equation Inversion Introduction of the Rotating Frame In the preceding section we established discretized state-space equations in the eigenvector frame of the evolution matrix. Eigenvalues characterize the motor evolution amplitude when it is short-circuited; eigenvectors characterize the directions of this evolution.
The rotor flux is thus well filtered and very near to the fundamental flux. The magnitude of the rotor flux vector is thus practically constant as is its rotation velocity, and this is what justifies the choice of the rotor flux vector to define the phase of the rotating frame in transient operation mode. 33). This frame is the Park reference frame (Park, 1929), used in particular by field orientation control (FOC). e. the rotation velocity of this reference frame can be nonconstant between times tn and (tn + T ); it slightly fluctuates with the rotor flux harmonics.
10). 16) we will allow us to establish continuous-time state-space equations of the induction machine; first of all, we will interpret them by reconstituting a new equivalent circuit starting from the obtained expressions. 20), interpreted as an electrical relation of the stator mesh, shows that all occurs such as if the motor, seen from its stator, would present one resistance Rs, one stator leakage inductance λ = σ ⋅ Ls and one air gap flux Fm at the angular frequency ωs. 23) In steady state operation, the equivalent resistance of the rotor Re, can be calculated simply by writing the electromechanical torque, starting from the electrical power in two different ways.