0.36°/Geared Closed Loop Stepper Motor and Driver, AS Series0 pages

0.36° Closed Loop Stepping Motor and Driver Package

AS Series Built-In Controller Package
The AS Series is a motor and driver package offering
the user-friendliness of a stepping motor combined
with improved response and reliability of our unique
closed loop technology.

For details on this product please
refer to our website, contact
technical support or your nearest
Oriental Motor sales office.
www.orientalmotor.com

● For detailed product safety standard information including standards, file number and
certification body, please visit www.orientalmotor.com.

■ Features
◇

● Incorporating Our Unique Closed Loop Control

Angle – Torque Characteristics

This product uses our closed loop control to maintain positioning
operation even during abrupt load fluctuations and accelerations.
The rotor position detection sensor monitors the rotation. When an
overload condition is detected, it will instantaneously regain control
using the closed loop mode.
When an overload condition continues it will output an alarm signal,
thereby providing reliability equal to that of a servo motor.

Stepping Motor
①Open Loop Mode

Torque

②Closed Loop Mode

is designed as a "package" consisting of a motor and a driver.

②Closed Loop Mode
-7.2˚

-5.4˚

-3.6˚

-1.8˚

0
1.8˚
Position

3.6˚

5.4˚

7.2˚

①If the positioning deviation is less than ±1.8˚, the motor
runs in open loop mode like a stepping motor.
②If the positioning deviation is ±1.8˚ or more, the motor runs
in closed loop mode and the position is corrected by
exciting the motor windings to generate maximum torque
based on the rotor position.

◇ The Sensor to Detect Rotor's Position
The
rotor position detection sensor uses the change in
inductance caused by change in the distance between the stator
teeth and the teeth on the sensor rotor to detect rotor position.

Sensor detects rotor position

Features

Input Counter

Deviation Counter

Rotor Position
Counter

Normal (Positioning deviation is less than ±1.8˚)
Motor runs in open loop mode like a stepping motor.
During Overload Condition (Positioning deviation is ±1.8° or more)
The closed loop mode is engaged to maintain the positioning operation.

A-68

ORIENTAL MOTOR GENERAL CATALOG
2012/2013

Motor

● This structure can be made small and thin, so the overall size of
the motor can be reduced
● High resolution
● This structure does not use electronic parts, so it is not affected by
heat or vibration

Sensor

Sensor Output Signal

1.25
1

Signal Level

Input Signal

Output Element

Control Diagram
Excitation Sequence Control

◇

0.5
0
-0.5
-1
0

60˚

120˚

180˚

Rotor Angle (Electrical Angle)

240˚

300˚
A-Phase

360˚
B-Phase