AUTOMATIC CONTROL OF THE IMPLANTABLE CENTRIFUGAL PUMP THROUGH ANALYSIS OF THE MOTOR CURRENT WAVEFORM

ASAIO Journal ◽  
1997 ◽  
Vol 43 (2) ◽  
pp. 63
Author(s):  
T. Iijima ◽  
T. Inamoto ◽  
M. Nogawa ◽  
M. Miura ◽  
Y. Shimazaki ◽  
...  
Keyword(s):  
Automatic Control ◽  
Centrifugal Pump ◽  
Current Waveform ◽  
Motor Current

Automatic Control of the Implantable Centrifugal Blood Pump Based on Analysis of the Motor Current Waveform

2001 ◽  
pp. 431-435
Author(s):  
K Ouchi ◽  
E Hatoh ◽  
A Yuhki ◽  
M Nakamura ◽  
T Sakamoto ◽  
...  
Keyword(s):  
Automatic Control ◽  
Blood Pump ◽  
Current Waveform ◽  
Centrifugal Blood Pump ◽  
Motor Current

AUTOMATIC CONTROL OF TRI-POD SUPPORTED SEAL-LESS CENTRIFUGAL BLOOD PUMP USING MOTOR CURRENT WAVEFORM

ASAIO Journal ◽  
2000 ◽  
Vol 46 (2) ◽  
pp. 198
Author(s):  
K. Ouchi ◽  
E. Hatoh ◽  
A. Yuhki ◽  
M. Nogawa ◽  
Y. Ohara ◽  
...  
Keyword(s):  
Automatic Control ◽  
Blood Pump ◽  
Current Waveform ◽  
Centrifugal Blood Pump ◽  
Motor Current

scholarly journals In Vivo Testing of a Magnetically Suspended Centrifugal Pump Designed for Long-Term Use

1997 ◽  
Vol 20 (10) ◽  
pp. 562-569 ◽  
Author(s):  
T. Yamada ◽  
K. Nishimura ◽  
T. Akamatsu ◽  
T. Tsukiya ◽  
C.H. Park ◽  
...  
Keyword(s):  
Centrifugal Pump ◽  
Rotational Speed ◽  
Thrombus Formation ◽  
Current Mode ◽  
Left Ventricular ◽  
Centrifugal Pumps ◽  
Motor Current ◽  
Magnetically Suspended Centrifugal Pump

The life of currently-available centrifugal pumps is limited to no more than three days. As a magnetically suspended centrifugal pump (MSCP) contains no shaft or seal, it could be expected to have a longer life expectancy. The MSCP was evaluated in a chronic animal model using eight adult sheep. Left ventricular assist with the MSCP was instituted between the left atrium and the descending aorta. The flow rates ranged from 2.5 to 6.0 L/min. The duration of the experiments ranged from 14 to 60 days. No mechanical failure occurred. The plasma free hemoglobin levels remained within an acceptable range (3-19 mg/dL). No reduction in the counts of red blood cells or platelets was observed. Thrombus formation within the MSCP was recognized in one pump. The main reason for termination was thromboembolism derived from the circuits. Three types of regulation methods (constant rotational speed, constant motor current, and controlled motor current) were also investigated. Regulation by a constant motor current mode altered the pressure-flow (P-Q) characteristics, and thereby, a steadier pump flow was obtained compared with regulation in the constant rotational speed mode. Moreover, the controlled motor current mode can change the P-Q relationship. These results demonstrate that the MSCP is a promising device for long-term use.

A Mahalanobis Distance Measurement Method to Analyze Current Waveform for Determining the Motor’s Quality Types

2017 ◽  
Vol 870 ◽  
pp. 317-322
Author(s):  
Yun Chi Yeh ◽  
Tsung Fu Chien ◽  
Cheng Yuan Chang ◽  
Tsui Shiun Chu
Keyword(s):  
Mahalanobis Distance ◽  
Classification Accuracy ◽  
Measurement Method ◽  
Signal Amplitude ◽  
Distance Measurement ◽  
Digital Converter ◽  
Current Waveform ◽  
Analog To Digital ◽  
Motor Current ◽  
Good Detection

This study proposes a Mahalanobis Distance Measurement (MDM) method to analyze current waveform for determining the motor’s quality types. The MDM method consists of three major stages: (i) the preprocessing stage which is for enlarging motor current waveforms’ amplitude and eliminating noises, and includes signal amplitude amplifier, filter circuit (eliminating noises), and analog-to-digital converter (ADC) parts, (ii) the qualitative features stage which is for qualitative feature selection on motor current waveforms, and (iii) the classification stage which is for determining motor quality types using the MDM method. It can recognize defective motors and their defective types in less than 0.5 second. In the experiment, the total classification accuracy (TCA) was approximately 99.03% in average. The proposed method has the advantages of good detection results, no complex mathematic computations, hi-speed, and hi-reliability.

scholarly journals Research on the induction motor current signature for centrifugal pump at cavitation condition

2015 ◽  
Vol 7 (11) ◽  
pp. 168781401561713 ◽  
Author(s):  
Yin Luo ◽  
Xiong Zhixiang ◽  
Hui Sun ◽  
Shouqi Yuan ◽  
Jianping Yuan
Keyword(s):  
Induction Motor ◽  
Centrifugal Pump ◽  
Motor Current ◽  
Current Signature

Weighting of Goods by Means of DC Motor

2012 ◽  
Vol 463-464 ◽  
pp. 1427-1431
Author(s):  
Radomil Matousek ◽  
Zdenek Namec ◽  
Tomas Marada
Keyword(s):  
Automatic Control ◽  
Practical Problem ◽  
Movement Control ◽  
Dc Motor ◽  
Real Solution ◽  
Basic Part ◽  
Motor Current ◽  
Movement Dynamics ◽  
Intelligent Process

The paper deals with the practical problem of the intelligent weighing and his real solution by means of unprecedented new progression. The project was concerned with handling and weighing goods with different weights of individual items. The basic part of the paper is a demonstration of automatic control of the intelligent process of weighing goods using mostly hardware and software resources by Phoenix Contact and standard DC motor platform. The basic idea of an intelligent weighing is based on the fact that the movement dynamics depends on the weight of the goods handled. In the process of movement control, detailed position and motor current values are measured to calculate the desired weight of the goods to be transported (handled).

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