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#033 Motion Mechanism Design - 3 : Introduction of Small Motor Characteristics

Category : Drive mechanism design
March12, 2010

Small motors can be categorized into: motors to obtain power by converting electrical energy to rotational energy, and motors for control where rotational position and velocity are regulated to achieve specific control purposes. The latter is mainly used for LCA（Low Cost Automation） purposes.
Here, the small motor characteristics are described.

Types and characteristics of various small motors
Main applicationType of small motorCharacteristics
Simple positioningMotors with electro-magnetic brake
・Often used for Z axis control since the load does not fall since the "power-off" brake can retain the shaft during a power outage.
・Overrun: 0.5~1 revolutions
・Rating: Minutes
Simple velocity controlVariable speed motor
・Overrun: 0.5~1 revolutions
・90〜1400r／min（50Hz）
・90〜1700r／min（60Hz）
High accuracy positioningStepper motor
・Excellent response at low speeds, low vibration.
・High resolution: 0.72 deg./ step
・High accuracy: ±0.05 deg. (no load)
・Open loop control.
・Large holding torque.
High speed/High accuracy positioningServo motor (AC)
・Excellent response at high speeds, low vibration.
・High resolution: 0.044 deg./step
・High accuracy: ±0.022 deg. (no load)
・Semi-closed loop control
・Abnormal load condition can be detected.
Motors for powerInduction motor・Overrun: 30~40 revolutions
Reversible motor
・Overrun: 5~6 revolutions
・Rating: 30 minutes
・With a simple brake mechanism

＜Partial reference from Oriental Motor Corp. material＞

MISUMI USA eCatalog

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