Construction of an isokinetic horizontal eccentric towing device to improve sprinting performance

2020 ◽  
pp. 175433712096065
Author(s):  
Farhan Tinwala ◽  
Enrico Haemmerle ◽  
John Cronin ◽  
Angus Ross
Keyword(s):  
Constant Velocity ◽  
Technical Note ◽  
Torque Control ◽  
Programmable Logic ◽  
Variable Speed ◽  
Isokinetic Training ◽  
Variable Speed Drive ◽  
Training Modality ◽  
Eccentric Overload ◽  
Safety Plc

Horizontal eccentric towing (HET) is a novel modality that delivers an eccentric overload to the musculature as an athlete attempts to move forward in a sprint stance whilst being pulled backwards. A device, called the HET, has been developed to automate this movement. Similar to a winch retracting an anchor on a boat, the HET device pulls an athlete that is tethered inwards and the athlete must resist this motion in a maximal manner, whilst maintaining a sprint stance. The HET device provides an isokinetic training modality by towing athletes inwards at a constant velocity. The HET device is operated by an electric 10 kW AC synchronous servo gearmotor. The motor is controlled by a variable speed drive (VSD) and programmable logic controller (PLC), which allow for accurate speed, position and torque control. A touchscreen PC runs the user interface displaying real-time force and speed measures. The HET device can produce a maximum towing force of 2.8 kN at ground velocities of up to 3.58 m/s. There is a separate safety PLC that triggers a safety-rated brake system when the E-stop buttons are pushed. This is paramount for athlete safety. In this technical note, the components used in the construction of the HET device will be detailed and insights into a novel stimulus will be offered, as well as a guide to develop and automate similar eccentric movements.

scholarly journals Studi Pengaturan Kecepatan Motor Induksi Tiga Phasa Menggunakan Variable Speed Drive (VSD) Berbasis Programmable Logic Controller (PLC)

JURNAL TEKNIK ◽  
2020 ◽  
Vol 14 (1) ◽  
pp. 121-128
Author(s):  
Riski Anda Rangkuti ◽  
Atmam Atmam ◽  
Elvira Zondra
Keyword(s):  
Programmable Logic Controller ◽  
Programmable Logic ◽  
Variable Speed ◽  
Variable Speed Drive

Motor induksi merupakan motor listrik arus bolak balik (AC) yang paling banyak digunakan saat ini, karena memiliki konstruksi yang sederhana, relatif murah serta mudah dalam pemeliharaannya. Motor induksi juga banyak digunakan untuk berbagai keperluan dalam proses produksi pada suatu industri.  Dengan berkembangnya teknologi sistem kontrol salah satu cara yang dilakukan adalah dengan menggunakan kendali Variable Speed Drive (VSD) yang dihubungkan langsung dengan motor induksi 3 phasa untuk mengatur kecepatan, dan ditambah dengan menggunakan Programmable Logic Controller (PLC) yang berfungsi sebagai pengendali Variable Speed Drive (VSD) untuk mengatur kecepatan motor induksi 3 phasa. Kecepatan motor induksi tiga phasa saat tidak terkopel beban sebesar 2802 rpm dengan frekuensi 50 Hz, kecepatan 1681 rpm pada frekuensi 30 Hz dan kecepatan 840,6 rpm pada frekuensi 15 Hz. Dengan kondisi terkopel beban kecepatan motor induksi tiga phasa sebesar 1434 rpm dengan frekuensi 25,6 Hz, kecepatan 1462 rpm pada frekuensi 26,1 Hz dan kecepatan 1496 rpm pada frekuensi 26,6 Hz. Frekuensi berbanding lurus terhadap kecepatan motor induksi 3 phasa, semakin besar frekuensi yang masuk pada motor induksi 3 phasa maka akan semakin cepat putaran motor induksi 3 phasa tersebut. Kata kunci : Motor Induksi 3 Phasa, Variable Speed Drive (VSD), Programmable Logic Controller (PLC).

DESIGN, SIMULATION AND IMPLEMENTATION MONITORING SYSTEM FOR SYSTEM CONTROL C4 FEEDING PUMP FOR FEED VAPORIZATION IN THE BUTADIENE PLANT

2020 ◽  
Vol 1 (1) ◽  
pp. 31-35
Author(s):  
Fahmi Yunistyawan ◽  
Yunistyawan J Berchmans ◽  
Gembong Baskoro
Keyword(s):  
Motor Control ◽  
Control System ◽  
Field Operator ◽  
System Control ◽  
Variable Speed ◽  
Variable Speed Drive ◽  
Software And Hardware ◽  
Discharge Pressure ◽  
Selection Of

This study implements the auto start control system on an electric motor 3 phase C4Feeding pump when the discharge pressure is low-low (4.3 kg /cm²). The C4 feeding pumpmotor was initially manually operated from the local control station, this was very ineffectiveand inefficient because it still relied on the field operator to operate the pump motor and whenthe plant was in normal operating it is very risk if the field operator late to operate motor then itwill impact to quality of the product, and if the delay time to operate motor is too long then planthave to shut down, therefore improvement is needed in the C4 feeding pump motor controlsystem. In this paper, various types of 3-phase motor control are explained which allow it to beapplied to the C4 feeding pump motor that are on-off, inverter, and variable speed drive andefficient selection of the three systems control of the motor. Software and hardware used in thisthesis work are DCS CENTUM VP Yokogawa.

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