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SRAC Series Two Phase AC Stepper Motor Drives

Advanced Current Control,Torque Ripple Smoothing,Anti-Resonance,Microstep Emulation
● Advanced Current Control
● Torque Ripple Smoothing
● Anti-Resonancelt
● Microstep Emulation
Brand Name: MOONS'
Price: USD  325.0  -  385.0  EA

Free shipping to North America and Europe for orders of $100 or more

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Free Exchange if the item has quality problems within 1 year. Learn more

 

■ Description

SRAC series ac stepper motor drives are based on current PID control algorithm design cost-effective segment type drive, is a compact, powerful digital stepper motor drives.And can be used to drive the ac power input, compared with traditional dc power input type of drive, has excellent high-speed characteristics;Large torque output;Low noise;Low vibration, etc.Each drive has a variety of parameter setting, through dial switch or rotary switch can quickly set the required parameters.

■ Features

Anti-Resonance / Electronic Damping
Step motor systems have a natural tendency to resonate at certain speeds. The SRAC drives automatically calculates the system’s natural frequency and applies damping to the control algorithm. This greatly improves midrange stability, allows for higher speeds, greater torque utilization and also improves settling times. Delivers better motor performance and higher speeds
 
Microstep Emulation
With Microstep Emulation, low resolution systems can still provide smooth motion. The drive can take low resolution step pulses and create fine resolution motion. Delivers smoother motion in any application
 
Torque Ripple Smoothing
All step motors have an inherent low speed torque ripple that can affect the motion profile of the motor. By analyzing this torque ripple the system can apply a negative harmonic to counter this effect.This gives the motor much smoother motion at low speed. Produces smoother motion at low speeds
 
Command Signal Smoothing
Command Signal smoothing can soften the effect of immediate changes in velocity and direction, making the motion of the motor less jerky. An added advantage is that it can reduce the wear on mechanical components. Improves smoother system performance
 
Auto Setup & Self Test
At start-up the drive measures motor parameters, including the resistance and inductance,then uses this information to optimize system performance. The drive can also detect open and short circuits.

■ Model Numbering System

■ Ordering Information

Model Current Voltage Selectable Microstep Selectable Current
SRAC2 0.6-2.5A 80-265VAC 16 settings 8 settings
SRAC4 0.4-4.0A 80-265VAC 16 settings 16 settings
SRAC8 0.4-8.0A 80-265VAC 16 settings 16 settings

Specification

通 用 规 格
Speed Range Up to 50 rps
Operating Temperature 0 - 40°C
Vibration Resistance 5.9m/s² maximum
Storage Temperature -10 - 70°C
Heat Sinking Method Natural cooling or fan-forced cooling
Atmosphere Avoid dust, oily mist and corrosive air
Mass SRAC2/3SRAC2: Approx. 0.8kg
SRAC4/SRAC8/3SRAC8: Approx. 1.2kg
Certification RoHS ,CE (EMC): EN 61800-3:2004 ,CE(LVD): EN61800-5-1:2007
Features
Idle Current Automatic idle current reduction to reduce heat after motor stops moving for 1 second
Dip switch selectable, 4 selection 25%,50%,70%,90% for SRAC4/8, 2 selection 50%,90% for SRAC2/3SRAC2
Anti-Resonance Raises the system-damping ratio to eliminate midrange instability and allow stable operation throughout the speed range of the
motor, dip switch selectable load inertia
Control Mode Dip switch selectable Step&Dir or CW/CCW Pulse(SRAC2 和 3SRAC2 need internal jumpers)
Inupt Signal Filter Digital filters prevent position error from electrical noise on command signals, Dip switch selectable 2MHz or 150KHz
Microstep Emulation Switch selectable microstep emulation provides smoother, more reliable motion
Motor Database Rotary switch easily selects from many popular motors
Self Test Switch selectable automatic self test, while self test, drive will rotate the motor back and forth, two turns in each direction.
 Protection overvoltage, undervoltage, over current, motor automatic detection Open circuit
Fault Output Optically isolated,30VDC max, 100MA max
 

SRAC2

Parameter Min. Typ. Max. Unit
Power Supply 80 265 VAC
Output Current (Peak) 0.6 2.5 Amps
Cost current of digital input signal 6 15 mA
Step Frequency 2 10 2M Hz
STEP minimum pulse width 250 ns
Direct pulse width 80 ns
Low-voltage protection point 75*/135* VAC
Over-voltage protection point 145*/295* VAC
Input Signal Voltage 4.0 28 VDC
Initialization time 2.5 S
OUT maximum output current 100 mA
OUT maximum voltage 30 VDC
*Note: When the AC input switch is selected on 115V, under voltage protection point is 75VAC, over voltage protection point is 145VAC. When the input switch is selected on 230V status, under voltage protection point is 135VAC, over voltage protection point is 295VAC.

SRAC4

Parameter Min. Typ. Max. Unit
Power Supply 80 265 VAC
Output Current (Peak) 0.4 4.0 Amps
Cost current of digital input signal 0.4 8 Amps
Step Frequency 2 2M Hz
STEP minimum pulse width 250 ns
Direct pulse width 80 ns
Low-voltage protection point 80 VAC
Over-voltage protection point 295 VAC
Input Signal Voltage 4 28 VDC
Initialization time 2.5 S
OUT maximum output current 100 mA
OUT maximum voltage 30 VDC
 

SRAC8

Parameter Min. Typ. Max. Unit
Power Supply 80 265 VAC
Output Current (Peak) 0.4 8.0 Amps
Cost current of digital input signal 6 10 15 mA
Step Frequency 2 2M Hz
STEP minimum pulse width 250 ns
Direct pulse width 80 ns
Low-voltage protection point 80 VAC
Over-voltage protection point 295 VAC
Input Signal Voltage 4 28 VDC
Initialization time 2.5 S
OUT maximum output current 100 mA
OUT maximum voltage 30 VDC

Compare Item Price
(USD)
Buy Now
SRAC8 $385.00
SRAC4 $355.00
SRAC2 $325.00

 

■ Dimensions (Unit : mm)

□ SRAC2
□ SRAC4/8

■ Communication Port

□ SRAC2
□ SRAC4/8

2D Drawings
Title Type Size(KB) Download
SRAC4_2D Drawings.dwg DWG 337
SRAC8_2D Drawings.pdf PDF 57
SRAC4_2D Drawings.pdf PDF 58
SRAC8_2D Drawings.dwg DWG 341
SRAC2_2D Drawings.pdf PDF 91
SRAC2_2D Drawings.dwg DWG 321
3D Model
Title Type Size(KB) Download
SRAC8_3D Model.step STEP 5021
SRAC4_3D Model.step STEP 4456
SRAC2_3D Model.step STEP 10695
Brochure
Title Type Size(KB) Download
SRAC Series Brochure.pdf PDF 1417
User Manual
Title Type Size(KB) Download
SRAC8_User Manual.pdf PDF 5359
SRAC4_User Manual.pdf PDF 3935
SRAC2_User Manual.pdf PDF 4707
Specifications
Title Type Size(KB) Download
SRAC8_Specifications.pdf PDF 1022
SRAC2_Specifications.pdf PDF 812
SRAC4_Specifications.pdf PDF 1071
Catalog
Title Type Size(KB) Download
Stepper Products General Catalog_20180531.pdf PDF 27992
Quick Start
Title Type Size(KB) Download
SRAC8_Quick Start.pdf PDF 641
SRAC4_Quick Start.pdf PDF 679
SRAC2_Quick Start.pdf PDF 752
Certification
Title Type Size(KB) Download
SRAC Series_CE.pdf PDF 2042
SRAC Series_RoHS.pdf PDF 264
 
 

Delivery & Packaging

Logistics tracking

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Professional Product Label

Considering all possible harsh application environments, MOONS' specially designed labels for each product, which pass water-resistance test, durability rub test, high temperature resistance and corrosion resistance tests.

Besides, our product labels are attached with QR code linking to product details, which is convenient for clients to view the detail product page with their mobile phones.

Note: This label design is suitable for products of stepper motor.

(Professional packing box and unique appearance design)

(Single item packed with EPE)

(Multi-products packed with another box)

Safely Packaging

In order to ensure your shipments withstand the long trip and arrive safely and intact, MOONS' specially designed Individual package to pass the drop test with its stable structure.
Besides,the package is made from recyclable materials, providing you with professional safety delivery.
Whether just single item or multi-products the clients buy, all products are packed twice to avoid the damage further.

Shipping Visualization

For each case, products are carefully packed by experienced warehouse staff and the key processes are recorded by photos, which are then posted on our website, so that clients could clearly know the packing process and logistics status after placing order.

(Product in the box)

(Add the invoice)

(Label the commodity)

(The logistics waybill attached)

Fast Delivery

Fast Cross-Border Delivery
MOONS' chooses DHL as our main international express shipping partner. As the world's leading logistics specialist, DHL provides our customers with fast and professional inter- national door-to-door delivery service.
Estimated Delivery Time: e.g. China-USA major cities 3 business days.

Professional
Warehouse Management

MOONS’ has an experienced warehouse management team, all products and materials are clearly classified and neatly arranged.