A differential built-in current sensor design for high-speed IDDQ testing

1997 ◽  
Vol 32 (1) ◽  
pp. 122-125 ◽  
Author(s):  
J.P. Hurst ◽  
A.D. Singh
Keyword(s):  
High Speed ◽  
Current Sensor ◽  
Sensor Design ◽  
Iddq Testing

scholarly journals Three-Axis Inductive Displacement Sensor Using Phase-Sensitive Digital Signal Processing for Industrial Magnetic Bearing Applications

Actuators ◽  
2021 ◽  
Vol 10 (6) ◽  
pp. 115
Author(s):  
Teemu Sillanpää ◽  
Alexander Smirnov ◽  
Pekko Jaatinen ◽  
Jouni Vuojolainen ◽  
Niko Nevaranta ◽  
...  
Keyword(s):  
Signal Processing ◽  
Digital Signal Processing ◽  
Eddy Current ◽  
High Speed ◽  
Digital Signal ◽  
Magnetic Bearing ◽  
Air Gap ◽  
Sensor Design ◽  
Quadrature Demodulation ◽  
Displacement Sensors

Non-contact rotor position sensors are an essential part of control systems in magnetically suspended high-speed drives. In typical active magnetic bearing (AMB) levitated high-speed machine applications, the displacement of the rotor in the mechanical air gap is measured with commercially available eddy current-based displacement sensors. The aim of this paper is to propose a robust and compact three-dimensional position sensor that can measure the rotor displacement of an AMB system in both the radial and axial directions. The paper presents a sensor design utilizing only a single unified sensor stator and a single shared rotor mounted target piece surface to achieve the measurement of all three measurement axes. The sensor uses an inductive measuring principle to sense the air gap between the sensor stator and rotor piece, which makes it robust to surface variations of the sensing target. Combined with the sensor design, a state of the art fully digital signal processing chain utilizing synchronous in-phase and quadrature demodulation is presented. The feasibility of the proposed sensor design is verified in a closed-loop control application utilizing a 350-kW, 15,000-r/min high-speed industrial induction machine with magnetic bearing suspension. The inductive sensor provides an alternative solution to commercial eddy current displacement sensors. It meets the application requirements and has a robust construction utilizing conventional electrical steel lamination stacks and copper winding.

I/sub DDQ/ sensing technique for high speed IDDQ testing

2002 ◽  
Author(s):  
T. Takeda ◽  
M. Hashizume ◽  
M. Ichimiya ◽  
H. Yotsuyanagi ◽  
Y. Miura ◽  
...  
Keyword(s):  
High Speed ◽  
Iddq Testing

Eddy current sensor simulation

2017 ◽  
Vol 36 (3) ◽  
pp. 619-632 ◽  
Author(s):  
Neven Bulic ◽  
Livio Šušnjic
Keyword(s):  
Eddy Current ◽  
Coupled Oscillators ◽  
Injection Locking ◽  
Current Sensor ◽  
Sensor Design ◽  
Position Measurement ◽  
Shift Measurement ◽  
Content Type ◽  
Eddy Current Sensor ◽  
Locking Mechanism

Purpose This paper aims to present a simulation concept and an experimental verification of a novel sensor design for the shaft position measurement based on the eddy current principle and the phase-shift measurement. The simulation method for the sensor characteristic determination is presented. Possible application of a new sensor type is theoretically presented, verified in simulation and compared with experimental results. Design/methodology/approach Sensor is based on the injection-locking phenomenon between coupled oscillators. Only one sensor per axis is used for position measurement. A pair of the sensing and reference oscillators in the sensor is electrically coupled via the coupling resistor. A change in the inductance for the eddy current sensor is simulated in the finite element method (FEM) software Flux and behavior of the sensor circuit is simulated in the SPICE simulator software LTSpice program. Finally, the simulation results are compared with the measurements conducted on the laboratory test rig. Findings A novelty in this approach is the usage of only one sensor per axis compared to the well-known differential measurement of the position that uses the opposite pair of the sensing oscillators in the same axis. A methodology for the sensor characteristic determination is presented and experimentally verified. Originality/value A new variation of a coupled-oscillator eddy current sensor design is introduced. A simulation approach for the characteristic determination of the sensors based on the weakly coupled oscillators and the injection-locking mechanism is presented.

An On-Chip High-Speed Current Sensor Applied in the Current-Mode DC–DC Converter

2014 ◽  
Vol 29 (9) ◽  
pp. 4479-4484 ◽  
Author(s):  
Hongyi Wang ◽  
Xi Hu ◽  
Quanfeng Liu ◽  
Gangdong Zhao ◽  
Dongzhe Luo
Keyword(s):  
High Speed ◽  
Current Mode ◽  
Current Sensor ◽  
On Chip
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