Analysis of orthogonal-core type linear variable inductor and application to VAr compensator

Electromagnetic Modeling of a Linear Synchronous Machine by Lumped Approach

“…According to (1), the gain of "F" which is a current-controlled voltage source is equal to N. So the magnetomotive force F in the magnetic part in the right side of Figure 1 is equal to NI. I is the current in the left circuit [7].…”

“…And this approach also consumes much less calculation time than FEM. Moreover, it can be well compatible with the design of electromechanical actuators [1] [2].…”

Development of a Novel Three-Phase Laminated-Core Variable Inductor for Var Compensation

“…The reluctance in -axis direction should be determined taking into account a laminated structure of the core. Apparent permeability in -axis is given by (6) where the vacuum and core permeability are and , and a space factor of silicon steel sheets is , which is 0.975. Since the core permeability is sufficiently larger than the vacuum one, (6) can be rewritten as follows: (7) Accordingly, the reluctance can be obtained based on (7).…”

“…In addition, it has wedge gaps on the cut surfaces for harmonic current reduction [5]. A trial 6.6 kV-100 kVA var compensator using the orthogonal-core variable inductors has been developed and demonstrated a good controllability and sinusoidal output current in field tests [6]. Its particular structure, however, is a manufacturing disadvantage.…”

Simulation of a Large Power Brushless Synchronous Generator (BLSG) With a Rotating Rectifier by a Reluctance Network for Fault Analysis and Diagnosis

“…In order to obtain the e.m.f, we use a coupling circuit in view to obtaining the derivative of the totalized flux through each phase [19]. The idea is illustrated in Fig.…”