Experimental study of a universal high-speed ac collector motor ; Експериментальне дослідження універсального високошвидкісного колекторного двигуна змінного струму

AC collector motors with power from tens to hundreds of watts are widely used in electric drives of flexible production systems, industrial robots, automation systems and vehicles. The most common is the use of universal alternating current collector electric motors. They are called universal because they can work from both an alternating current and a direct current network. They have the ability to smoothly change the speed of rotation of the drive - its shaft, which sets the executive mechanism in motion. An actual direction is conducting experimental studies of universal alternating current collector motors, which are used as a drive for hand-held power tools. This is done through the use of a specially developed experimental stand that takes into account the peculiarities of the operation of such electric motors. The purpose of the work is an experimental study of a universal AC collector motor to evaluate its parameters and characteristics. To evaluate the parameters and characteristics of such a motor for the drive of a hand-held electric tool, an experimental stand was developed, which takes into account the high speed of rotation of the output shaft of the device and allows smoothly changing the load to obtain operating characteristics. The hand-held electric tool of the world-famous manufacturer Makita, model GA5030, is used as the research object. Structurally, the drive motor is a collector machine of variable voltage with series excitation. The speed of rotation of such motors is regulated by changing the power supply voltage supplied to the motor. The structure of the experimental stand for the study of high-speed universal collector machines was developed, all components were selected and the stand was correctly assembled, according to the developed basic electrical and assembly diagram. Using the developed stand, the operating characteristics of the engine under study P1, Ia, η, cosϕ, n, M= f(P2) were recorded. The engine under study meets the stated characteristics. The value of the nominal ...