FAQs

Q What are the advantages of brushless DC motors (BLDC motors) against brushed DC motors?: A

Brushless DC motors (BLDC motors), away with brushes and commutators which have mechanical contacts, are:

free from maintenance and long-life,

low noise and

capable of operating at high speed.
Q What types of noise do brushed DC motors generate?: A

Generally, slipping contact of a brush and a commutators in a brushed DC motor generates electric noise and acoustic noise.
Q What is the material of a brush in a DC motor?: A

A brush is usually made of metal, carbon and metal-carbon composition. Some metal brushes apply precious metals such as gold on a contact surface with a commutator. The material for a brush is carefully chosen considering electric voltage/current and from enonomical aspects.
Q What are the advantages of hybrid (HB) type stepper motors (stepping motors) against the other types of stepper motors?: A

HB stepper motors combine the features of permanent magnet (PM) type stepper motors and variable reluctance (VR) type stepper motors. This gives HB stepper motors the following advantages:

High output torque

High resolution in step angle

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