How does the brushless impact wrench work

The brushless impact wrench is an efficient power tool widely used in industries such as industry and automotive maintenance. Its working principle is based on the superior characteristics of brushless motors, combined with an impact mechanism to achieve efficient tightening and loosening of bolts and nuts. The design of the brushless motor not only enables it to provide higher torque output during operation, but also significantly extends the service life of the tool and reduces maintenance requirements.

The core of the brushless motor is that it does not rely on carbon brushes and commutators, but adjusts the direction and intensity of the current through an electronic control system. This design enables the motor to achieve more stable and efficient power output when working. In a brushless impact wrench, the motor is driven by the DC current provided by the power supply. After passing through the control circuit, the current is accurately distributed to the stator coil of the motor, forming a strong magnetic field. Due to the unique structure of the brushless motor, there is no direct mechanical contact between the stator and the rotor, which effectively reduces friction losses and avoids the performance degradation of traditional motors caused by carbon brush wear. The rotor rotates in the magnetic field generated by the stator, and the power generated is transmitted to the output shaft through the internal reduction gear system, driving the working head of the wrench for efficient operation.

The impact mechanism is one of the core functions of a brushless impact wrench. This mechanism is implemented through an electronic control system, and the motor speed can quickly reach a peak, thereby generating a strong torque in a short time. When it is necessary to loosen or tighten the bolt, the impact mechanism inside the tool will generate a high-frequency impact force through a series of rapid rotation and reversal actions. This impact force can effectively overcome the friction of the bolt, allowing the bolt to be tightened or loosened in an instant. This mechanism not only significantly improves work efficiency, but also reduces the user's physical exertion, especially during long-term operations.

Another significant advantage of brushless impact wrenches is the adjustability of their torque output. Modern brushless impact wrenches are usually equipped with a digital torque adjustment function, and users can choose the appropriate torque gear according to specific work needs. This flexibility enables brushless impact wrenches to perform well in a variety of application scenarios. For example, in car repairs, users can choose the corresponding torque setting according to different bolt specifications and materials, effectively avoiding bolt damage or material deformation caused by over-tightening.

In terms of battery life, brushless impact wrenches usually use high-capacity lithium batteries, combined with the high efficiency of brushless motors, which can provide longer use time. In actual operation, users can enjoy fewer charging times and longer working cycles, which is especially important for professionals who need to work for long periods of time. In addition, many brushless impact wrenches also have a fast charging function, which can complete the battery charging in a short time, further improving the efficiency and convenience of tool use.