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Investigation into Increasing the Motor-Drivable Current Using a Thermoelectric Cooling Module

100%

Morikawa K. , Katsura S.

tom Vol. 7 (42)

279--289

To enhance the performance of humanoids, mobile robots and manipulators, motors are desired to be able to provide high torque without relying on gears. To be able to drive joint motors with high output, the current value that can flow needs to be increased. However, the heat generated by the high current drive can cause motor failure, so cooling is necessary. We used thermoelectric cooling as a new cooling method for high-power drive of motors. By developing a thermoelectric cooling module for motors and conducting experiments, the effectiveness of thermoelectric cooling was verified. In the experiment, the motor was kept running at a high current for a long period of time. The comparison with the motor alone or with water cooling showed that the thermoelectric cooling module can significantly reduce the rise in temperature of the motor. Furthermore, based on the results of the voltage value measurements, it was expected that the increase in coil resistance due to higher coil temperatures would be kept lower than in other cases. The effect on rise in internal temperature was also considered to be greater than that of water cooling. These experimental results show that the thermoelectric cooling module can be used to increase the upper limit of the current at which the motor is continuously driven.

Transmission characteristics of the mobile inductively coupled power transfer system for dual transmitters and pickups based on PSpice

86%

Gao X. , Li X. , Gao X. , Li X.

Experiment and analysis of high power line-start PM motor

72%

Lu Q. , Huang X. , Ye Y. , Fang Y.

tom R. 88, nr 2

274-277

This paper investigates the performance of a high power line-start permanent-magnet motor (LSPM) by experiment, which is developed for industrial fans, pumps and compressors to reduce the energy consumption. The no-load back-EMF is measured and compared with predicted result of FEM. In order to assess the line starting ability, the rotor-locked test is carried out and then the starting torque ratio is deduced which is lower than that of induction motor of the same power. By adjusting the load, the efficiency and power factor during all operation condition are obtained. It is found this proposed LSPM has not only higher power factor and efficiency, but also high overload ability. After its starting ability of reduced voltage is analyzed, several useful methods are pointed out for designing high power LSPM which should start with limited current.

Zbadano właściwości silnika wysokiej mocy LSPM w zastosowaniu przemysłowym do pomp, wentylatorów i kompresorów pod kątem redukcji zużycia energii. Zbadano silnik przy zablokowanym wirniku i na tej podstawie przewidywano moment startowy. Przy zmianie obciążenia określono współczynnik mocy i sprawność.

Prototyp systemu do diagnostyki kotłów energetycznych dużej mocy

72%

Cader M. , Kowalski G.

2013

tom R. 85, nr 5

13--17

Diagnostyka ścian paleniska kotłów energetycznych dużej mocy obecnie jest wykonywana z wózków liniowych lub rusztowań. Operator dokonuje ręcznego pomiaru zużycia w wytypowanych punktach pomiarowych, których może być nawet 20 000. W odpowiedzi na obecną metodę pomiaru w Przemysłowym Instytucie Automatyki i Pomiarów PIAP trwają prace nad prototypem systemu do zautomatyzowanej diagnostyki ścian palenisk. W skład systemu wchodzi robot wspinający się, konsola sterująca oraz oprogramowanie sterujące i realizujące obróbkę danych pozyskanych od robota. Przedstawiono wyniki opracowań oraz pierwszych testów systemu.

Nowadays, diagnostics of high-energy boilers’ walls is carried out mainly from scaffoldings. Servicemen carry out manual measurements of the use of the boiler in selected points, which can be up to 20 000. In response to the current method of measuring the Industrial Research Institute for Automation and Measurements PIAP is working on a prototype system for automated diagnostic of boilers’ walls. The system consists of the climbing robot, control console and software for control and processing data obtained by the robot. The results of studies and the first tests of the system are presented in the paper.

Beam divergence and COD issues in double barrier separate confinement heterostructure laser diodes

58%

Maląg A.

nr 2