Contribution to Environment through Products and Solutions
Role of Brushless DC Motors in Environmental Conservation
Brushless DC motors are advantageous in terms of energy saving, longevity, compactness, light weight, low noise, and other environmental characteristics. Therefore, demand for Nidec's brushless DC motors has expanded greatly in a wider field of applications such as home appliances and automobiles, and further growth is expected.
What Is a Brushless DC Motor?
Motors are basically classified into AC motors and DC motors. DC motors are mainly classified into brushed and brushless types. Nidec specializes in manufacturing the latter, brushless DC motors.
To operate a motor, the direction of electrical current on the coil needs to be changed. AC motors run on Alternating Current (AC) that changes the direction of electrical current, while DC motors run on Direct Current (DC) that flows in the coil in one direction , requiring a part called a "brush" to change the direction of electrical current.
Since the "brush" conducts electricity by making direct contact with another part called a commutator, noise can be easily emitted and the parts wear and lose their functionality or emit electromagnetic noise that may cause computers to malfunction.
Brushless DC motors control the direction of current flow with the electronic circuit without using the "brush." As the electronic circuits can enable precision control of the current, motor operation can be controlled in a highly precise manner. Thus, the brushless motors are used for various types of high-value added products that require high-level precision.
