The effect of servo motor structures on the encoder temperature variations

• Main Authors: HuichunChu, 朱惠君
• Other Authors: Jung-Hua Chou
• Format: Others
• Language: zh-TW
• Published: 2014
• Online Access: http://ndltd.ncl.edu.tw/handle/5rfac7

碩士 === 國立成功大學 === 工程科學系碩士在職專班 === 102 === The servo motor is widely used in many fields and plays an important role in industrial automation. The servo motor is being asked to reduce its volume, resulting in increased servo motor power density. In order to obtain high motion accuracy, the servo motor must use an optical position sensor (encoder) in which an LED is usually employed. Hence, the LED inside the encoder is the weakest part of the high accuracy servo motor. So we want to reduce the LED temperature to increase servo motor life. By using CAE software we can analyse the temperature distribution of the servo motor. As the fin is the simplest method to remove heat dissipation, we use finite element software to optimize the temperature of motor by fin design. The surface of the motor frame is the largest pathway for heat transfer to the surrounding while the rear-bracket is the component closest to the LED. Therefore, we add fins to the frame and the rear-bracket individually. When we design the rear-bracket with fin, the temperature has no significant change. However, after adding a fin to the frame surface, the temperature drops about 22~25℃. By this design, we can reduce temperature by 22~25℃ as compared with the original model.