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Principles of Energy Conversion
Published in Hamid A. Toliyat, Gerald B. Kliman, Handbook of Electric Motors, 2018
Hamid A. Toliyat, Gerald B. Kliman
The environment in which the motor must operate determines how the motor must be enclosed to protect the electrical parts and to protect workers from the moving parts. Since enclosures add cost and restrict cooling, one should use the most open motor consistent with the environment. Outside of North America, enclosures and cooling are defined by IEC Publication 34-5 [95], Degrees of Protection Provided by Enclosures. It uses designations IP00 through IP67, based on ability to withstand dust (first digit) and water (second digit). In North America NEMA MG 1, Part 5 address the same factors. The most recent issue of MG 1 has been harmonized with IEC 34-5. The following discussion uses NEMA MG 1 descriptive terms common before harmonizing with the IEC terms.
Single-Manipulator Testing Technique
Published in Chunguang Xu, Robotic Nondestructive Testing Technology, 2022
The six joints of manipulator connected in series are all rotary joints, each of which is driven by a servo motor to rotate. The servo motors, reducers and bearings of the manipulator are integrated. This design can save space, simplify the wiring arrangement and improve the waterproofing grade by ensuring that all the joint motors are wrapped in the manipulator without being exposed. In this paper, water is used as coupling agent in the testing process. The waterproofing grade of the manipulator body is IP65 and that of the wrists is IP67, high enough to meet the waterproof requirements of ultrasonic NDT.
Reliability evaluation of CAN-bus connectors with tailored testing
Published in Mining Technology, 2023
Petteri Ojala, Jari Rämö, Juha Miettinen, Matti Vilkko
In this study, the CAN-bus connectors of an underground mine drill were used as a case study, but a similar approach would be applicable to other heavy machinery as well. The starting point of the test development was IP classification. The IP standard defines the protection level against the ingress of liquids and particles. The IP67 rating is very common for outdoor applications because it is the first rank of rating that is tested with water immersion, not sprayed water – in other words, it is rated as waterproof rather than as merely water resistant. IP67 requires protection against talcum powder exposure for eight hours and water immersion for 30 min in conditions specified under standard EN 60529:1991 (SFS 2000). In this study, these ingress stress factors are supplemented with other stress factors present in the operation of an underground mine drill, and the tailored tests were planned accordingly.
Design and testing of a personalized noise monitoring system
Published in Journal of Occupational and Environmental Hygiene, 2023
Oliver Stroh, Geb Thomas, Thomas M. Peters, Marcus Tatum
A Samsung Galaxy S5 Active smartphone (Galaxy S5 Active, Samsung, Seoul, South Korea) was the core of the wearable monitor. The S5 Active was chosen because of its low cost (∼$84), compatibility with the noise dosimeter, common operating system, the ability to freely code applications, and its available sensors and storage. It also has an ingress protection (IP) rating of 67 (IP67), meaning it is protected from dust ingress and can withstand immersion of up to a 1-m depth in water. The S5 Active comes with basic smartphone functionality such as wireless communication, GPS positioning, expandable storage, and additional sensors (e.g., accelerometers and gyroscopes).