Therefore, it has a low manufacturing cost as well as ruggedness and can be operated at extremely high speeds. The motor does not employ any permanent magnets and its rotor contains only iron. Moreover, the BLDC motor has a higher efficiency and smaller size than the brushed DC motor, whereas SRMs are similar to brushless motor types. Surprisingly, the BLDC motor has torque-speed characteristics that are almost the same as those of brushed DC motors. These disadvantages can be overcome by the use of brushless motors such as switched reluctance motors (SRMs) and BLDC motors. This means that the brushed DC motor has a short operating life because the brushes need more frequent maintenance and replacement over time. However, when employing brushed DC motors to control current, a mechanical system known as the commutator brushes system is required. In addition, power tools are required for the capability of forward and reverse rotation as well as operating at different speeds.īrushed direct-current (DC) motors have been employed for such applications because of their excellent torque-speed characteristics and ease of control.

Therefore, technical performance and convenient operation in power tool design are becoming more and more essential, including factors such as smaller size, more robust operation, higher battery voltage driving capability and higher speed capability. The global power tools market is expected to increase at a compound annual growth rate of 5.5% and to reach US$41.7 billion during the period of time from 2019 to 2024. Due to their convenience and easy operation, they have been widely employed in automotive maintenance, construction and home repair as well as in plant and garden pruning. In recent years, power tools, also known as electric hand tools, have been applied in many areas of the machinery and mechanical industries.

Bldc tool terminal battery voltage