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.
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
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.
RoHS ，CE (EMC): EN 61800-3:2004 ，CE(LVD): EN61800-5-1:2007
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
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
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
Switch selectable microstep emulation provides smoother, more reliable motion
Rotary switch easily selects from many popular motors
Switch selectable automatic self test, while self test, drive will rotate the motor back and forth, two turns in each direction.
overvoltage, undervoltage, over current, motor automatic detection Open circuit
Optically isolated,30VDC max, 100MA max
Output Current (Peak)
Cost current of digital input signal
STEP minimum pulse width
Direct pulse width
Low-voltage protection point
Over-voltage protection point
Input Signal Voltage
OUT maximum output current
OUT maximum voltage
*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.
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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.
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