The brushless angle grinder was the first generation developed by Fujian Jiayuan Electric Tools Co., Ltd. and obtained a national patent. This machine does not require carbon brush transfer. The rotor is pressed from solid silicon steel sheets without metal coil winding, making it more durable.
Traditional angle grinder
After decades of evolution and development, angle grinders have evolved from being large, bulky, and requiring two people to operate together to today's It is compact, lightweight, powerful, and can be operated by one person or even one hand, which is a huge improvement. At the same time, the development of angle grinders has also played a huge role in the progress of world industry. However, the development of angle grinders has always been inseparable from one of the consumables - carbon brushes.
Carbon brushes are an industrial consumable product, used in DC motors or AC commutator motors, such as general power tools, such as hand drills and angle grinders. It is used to cooperate with the commutator to realize the commutation of motor current. The carbon brush is the sliding contact body of the motor (except squirrel cage motor) that conducts current. In a DC motor, it is also responsible for commutating (rectifying) the alternating electromotive force induced in the armature winding. Practice has proved that the reliability of motor operation is largely determined by the performance of carbon brushes.