Synchronization using Servo Motors with Absolute Encoders

Synchronization using Motor Starters Diagram

Synchronization Control System

Actuator Control Systems

Synchronization Control Systems provide an electrical solution to synchronizing actuators where mechanical shafting and coupling cannot be achieved. It is ideal for systems using multiple electric motors, and are designed to hold a tolerance that supports your application needs.

Duff-Norton Motion Control Solutions

FEATURES & BENEFITS:

Mechanically interlocked, short circuit protected, main disconnect switch
NEMA type 4, 12, 4X or explosion proof enclosure (application specific)
Enclosure door mounted, illuminated or non-illuminated, Emergency Stop (E-Stop)
Labeled terminal strip for field installed devices

Adjustable motor overload on each motor (for motor starter applications)
Short circuit protection for all motor starters, VFDs, and servo drives
Two channel safety relay (for VFD and servo applications)

Synchronization Controls Comparison Chart

Control Type	Ease of Installation	Accuracy	Tolerance	System Flexibility	Longevity	Overall System Performance	Cost
Motor Starter	★ ★	★	★	★	★	★	$
VFDs	★	★★	★★	★★	★★★	★★	$$
Servo Motors	★★★	★★★	★★★	★★★	★★	★★★	$$$
★= Good ★★=Better ★★★=Best

Standard Synchronization Control Methods

Method 1 - Synchronization Using Motor Starters

Encoder 1 and 2 communicate the position of both jack 1 and jack 2 to the controller.
The controller turns motor starter 1 and 2 on or off depending on the position of jack 1 and 2.

Motor starter 1 and 2 apply power to jack motors 1 and 2 based on encoder feedback to keep the system synchronized.

Method 2 - Synchronization Using Variable Frequency Drives (VFD)

	Encoder 1 and 2 communication the position of both jack 1 and 2 to the controller. The controller commands VFD 1 and 2 to change output frequency to motor 1 and 2 based on each jacks position.		VFD 1 and 2 change output frequency to both motor 1 and 2 based on the encoder feedback to keep the system synchronized.

Method 3 - Synchronization Using Servo Motors With Absolute Encoders

The controller commands servo drive 2 to follow server drive 1.
Servo drive 2 adjusts the output power to servo motor 2 in order to keep jack 2 in sync with jack 1.

Integrated absolute encoders in both servo motors feedback position to the controller.

Synchronization Control System

Actuator Control Systems

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Synchronization Controls Comparison Chart

Standard Synchronization Control Methods

Method 1 - Synchronization Using Motor Starters

Method 2 - Synchronization Using Variable Frequency Drives (VFD)

Method 3 - Synchronization Using Servo Motors With Absolute Encoders

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