Optimal sub‐harmonic injection‐locked MICS band transmitter for wireless CW‐fNIRS systems

2021 ◽  
Author(s):  
Hadi Borjkhani ◽  
Seyed Kamaledin Setarehdan ◽  
Samad Sheikhaei
Keyword(s):  
Harmonic Injection ◽  
Mics Band

scholarly journals High-Harmonic Injection-Based Brushless Wound Field Synchronous Machine Topology

Mathematics ◽  
2021 ◽  
Vol 9 (15) ◽  
pp. 1721
Author(s):  
Syed Sabir Hussain Bukhari ◽  
Fareed Hussain Mangi ◽  
Irfan Sami ◽  
Qasim Ali ◽  
Jong-Suk Ro
Keyword(s):  
High Harmonic ◽  
Current Injection ◽  
Harmonic Current ◽  
Element Analysis ◽  
Magnetomotive Force ◽  
Excitation Scheme ◽  
Three Phase ◽  
Harmonic Injection ◽  
Field Excitation ◽  
Electromagnetic Performance

This paper discusses the design and analysis of a high-harmonic injection-based field excitation scheme for the brushless operation of wound field synchronous machines (WFSMs) in order to achieve a higher efficiency. The proposed scheme involves two inverters. One of these inverters provides the three-phase fundamental-harmonic current to the armature winding, whereas the second inverter injects the single-phase high-harmonic i.e., 6th harmonic current in this case, to the neutral-point of the Y-connected armature winding. The injection of the high-harmonic current in the armature winding develops the high-harmonic magnetomotive force (MMF) in the air gap of the machine beside the fundamental. The high-harmonic MMF induces the harmonic current in the excitation winding of the rotor, whereas the fundamental MMF develops the main armature field. The harmonic current is rectified to inject the direct current (DC) into the main rotor field winding. The main armature and rotor fields, when interacting with each other, produce torque. Finite element analysis (FEA) is carried out in order to develop a 4-pole 24-slot machine and investigate it using a 6th harmonic current injection for the rotor field excitation to both attain a brushless operation and analyze its electromagnetic performance. Later on, the performance of the proposed topology is compared with the typical brushless WFSM topology employing the 3rd harmonic current injection-based field excitation scheme.

0.16-0.25 pJ/bit, 8 Gb/s Near-Threshold Serial Link Receiver With Super-Harmonic Injection-Locking

2012 ◽  
Vol 47 (8) ◽  
pp. 1842-1853 ◽  
Author(s):  
Kangmin Hu ◽  
Rui Bai ◽  
Tao Jiang ◽  
Chao Ma ◽  
Ahmed Ragab ◽  
...  
Keyword(s):  
Injection Locking ◽  
Serial Link ◽  
Harmonic Injection ◽  
Near Threshold

An Active Protection Scheme for Microgrids Based on the Harmonic Injection

2021 ◽  
Author(s):  
Xia Aiming ◽  
Chen Yang ◽  
Fu Bin ◽  
Wu Fengyu ◽  
Zhang Yuchen
Keyword(s):  
Protection Scheme ◽  
Active Protection ◽  
Harmonic Injection
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