Engineering Notes by Oriental Motor

Welcome to Oriental Motor's "Engineering Notes" Blog:

Products and technology are only valuable when coupled with skilled people and services to support them. ORIENTAL MOTOR U.S.A. CORP. has dedicated over 33 years to establishing a service and support system to better serve customers. It is our goal to provide the best product and service from the design phase, through the sale and beyond.

Our blog will feature:

  • Introductions to New Products and Technology
  • Application Examples, Improvements and Problem Solving
  • Tips and Recommendations for Motor Selection, Installation and Use

Speed Control Basics: VFD or Triac Phase Control for AC Induction Motors?

Posted by Johann Tang on Feb 26, 2021 9:09:03 PM

When a voltage is applied to an AC induction motor, it runs at a certain speed.  Variable speed requirements for AC induction motors are typically fulfilled by a 3-phase motor and an inverter, or VFD.  This blog post introduces another option.

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Topics: Conveyor, AC Motors, Speed Control, Motion Control Basics

Instantaneous Forward / Reverse Operation with Three-Phase AC Induction Motors

Posted by Johann Tang on Feb 1, 2021 10:04:04 PM

The differences in single-phase and three-phase AC induction motors don't stop with the input power supply.  There are a few things you need to know when using three-phase AC induction motors in an instantaneous forward/reverse operation.

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Topics: AC Motors, Speed Control

What Determines Motor Life?

Posted by Johann Tang on Sep 30, 2020 10:30:00 AM

Knowing how to use a product properly can make a huge difference in its performance and life.  For example, knowing how to maintain cast iron pans properly can make them last longer.  With electric motors, understanding the factors that affect motor life is the first step to extending life and decreasing costs in the long run.

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Topics: AC Motors, Stepper Motors, Linear & Rotary Actuators, Speed Control, Servo Motors, Service Life

The Differences Between Brushed and Brushless DC Motors

Posted by Johann Tang on Jul 31, 2020 7:32:03 PM

I will never forget my first engineering project involving motors.  I built a small elevator for a science class back in elementary school.  Of course, it worked great during the testing phase, but it failed to perform when it counted.

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Topics: Speed Control, VIDEOS, BLDC Motors

Minimizing the Effect of Load Fluctuations for Mixers

Posted by Johann Tang on Jun 30, 2020 12:00:00 PM

The viscosity change in liquids can vary the torque required for mixing.  For AC asynchronous motors such as AC induction motors, the rated speed is affected by load torque fluctuations, which may cause inconsistency in the final product.  Is there a better motor for the job?

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Topics: Speed Control, VIDEOS, BLDC Motors, Gearheads, Washdown, Application Examples

Control Basics: The Difference Between Sink and Source Logic

Posted by Johann Tang on Apr 30, 2020 9:16:14 PM

For someone who has never had experience wiring I/O for motion control, it can be scary the first time.  If devices are not wired correctly, it can cause a range of issues from a motor simply not doing what's expected to irreversible product damage.  I still get that nervous feeling before I press the START button on a demo.  Murphy's Law, anyone?

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Topics: AC Motors, Stepper Motors, Alphastep Hybrid Control, Linear & Rotary Actuators, Speed Control, BLDC Motors, Servo Motors, Motion Control Basics

Motor Sizing Basics Part 4 - Radial Load and Axial Load

Posted by Johann Tang on Mar 31, 2020 7:58:57 PM

Besides load torque, acceleration torque, speed, and load inertia, overlooking certain sizing parameters during the motor sizing process can literally make or break your machine.

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Topics: AC Motors, Stepper Motors, Speed Control, Motor Sizing, Capping, BLDC Motors, Gearheads, Servo Motors, Motion Control Basics

Motor Sizing Basics Part 3: Acceleration Torque (and RMS Torque)

Posted by Johann Tang on Feb 27, 2020 9:05:40 PM

Now that we understand the calculations behind load torque and load inertia, we're two steps closer to motor selection.  You might be wondering why I separated load torque and acceleration torque calculations.  That's because in order to calculate for acceleration torque, load inertia and speed must be calculated first. 

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Topics: AC Motors, Stepper Motors, Alphastep Hybrid Control, Linear & Rotary Actuators, Speed Control, Motor Sizing, BLDC Motors, Servo Motors, Motion Control Basics

Motor Sizing Basics Part 2: Load Inertia

Posted by Johann Tang on Jan 17, 2020 7:51:53 PM

Other than torque or speed, another factor should be considered when sizing motors.  

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Topics: AC Motors, Stepper Motors, Alphastep Hybrid Control, Linear & Rotary Actuators, Speed Control, Motor Sizing, BLDC Motors, Gearheads, Servo Motors, Rotary/Index Tables, Motion Control Basics

Motor Sizing Basics Part 1: Load Torque

Posted by Johann Tang on Jan 14, 2020 8:14:54 PM

Proper sizing of a motor requires that 3 criteria must be met: torque, load inertia, and speed.  For the first part of this Motor Sizing Basics series, I will be explaining what load torque is, how to calculate it for specific application examples, and how it fits into the torque requirement for the application.

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Topics: Conveyor, AC Motors, Stepper Motors, Alphastep Hybrid Control, Linear & Rotary Actuators, Speed Control, Motor Sizing, BLDC Motors, Servo Motors, Rotary/Index Tables, Motion Control Basics