---
title: Engineering Notes | AC Motors (3)
description: AC Motors | 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. (3)
---

[![Oriental Motor U.S.A. Corp.](https://blog.orientalmotor.com/hs-fs/hubfs/OM-logo-200px.jpg?width=200&height=47&name=OM-logo-200px.jpg)](https://www.orientalmotor.com/index.html)

- <https://blog.orientalmotor.com>
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- [Industrial Robots](https://www.orientalmotor.com/industrial-robots/index.html)
- [AC Motors & Gear Motors](https://www.orientalmotor.com/ac-motors-gear-motors/index.html)
- [Brushless DC Motors](https://www.orientalmotor.com/brushless-dc-motors-gear-motors/index.html)
- [Linear Actuators](https://www.orientalmotor.com/linear-actuators/index.html)
- [Rotary Actuators](https://www.orientalmotor.com/rotary-actuators/index.html)
- [Network Products](https://www.orientalmotor.com/network-products/index.html)
- [Cooling Fans](https://www.orientalmotor.com/cooling-fans/index.html)
- [Encoders](https://www.orientalmotor.com/encoders-sensors/index.html)

Engineering Notes

## 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. Since 1978, ORIENTAL MOTOR U.S.A. CORP. has been building 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:**

- Introduction to new products and technologies
- Motion control basics and application examples
- Tips for motor selection, programming, and troubleshooting

 

## [Motor Sizing Basics Part 1: How to Calculate Load Torque](https://blog.orientalmotor.com/motor-sizing-basics-part-1-load-torque)

 Posted by [Johann Tang](https://blog.orientalmotor.com/author/johann-tang) on Jan 14, 2020, 8:14:54 PM

- [Tweet](https://twitter.com/share)

[![Motor Sizing Basics Part 1: How to Calculate Load Torque](https://blog.orientalmotor.com/hubfs/image-96.png)](https://blog.orientalmotor.com/motor-sizing-basics-part-1-load-torque)

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.

[Read More](https://blog.orientalmotor.com/motor-sizing-basics-part-1-load-torque)

 16 Comments [Click here to read/write comments](https://blog.orientalmotor.com/motor-sizing-basics-part-1-load-torque#comments-listing)

 Topics: [AC Motors](https://blog.orientalmotor.com/topic/ac-motors), [Stepper Motors](https://blog.orientalmotor.com/topic/stepper-motors), [Alphastep Hybrid Control](https://blog.orientalmotor.com/topic/alphastep-hybrid-control), [Linear Actuators](https://blog.orientalmotor.com/topic/linear-actuators), [Speed Control](https://blog.orientalmotor.com/topic/speed-control), [Motor Sizing](https://blog.orientalmotor.com/topic/motor-sizing), [BLDC Motors](https://blog.orientalmotor.com/topic/bldc-motors), [Servo Motors](https://blog.orientalmotor.com/topic/servo-motors), [Rotary Actuators/Index Tables](https://blog.orientalmotor.com/topic/rotary-actuators-index-tables), [Motion Control Basics](https://blog.orientalmotor.com/topic/motion-control-basics), [Conveyors](https://blog.orientalmotor.com/topic/conveyors)

## [3 Ways to Troubleshoot AC Motors with a Circuit Tester](https://blog.orientalmotor.com/3-ways-to-troubleshoot-ac-motors-with-a-circuit-tester)

 Posted by [Johann Tang](https://blog.orientalmotor.com/author/johann-tang) on Dec 27, 2019, 8:36:17 PM

- [Tweet](https://twitter.com/share)

[![Compare applied voltage with capacitor terminal voltage](https://blog.orientalmotor.com/hubfs/image-92.png)](https://blog.orientalmotor.com/3-ways-to-troubleshoot-ac-motors-with-a-circuit-tester)

An AC motor is not working like it's supposed to.  What do you do?  Before replacing the motor, here are three ways to start troubleshooting your AC motor with a circuit tester.

[Read More](https://blog.orientalmotor.com/3-ways-to-troubleshoot-ac-motors-with-a-circuit-tester)

 2 Comments [Click here to read/write comments](https://blog.orientalmotor.com/3-ways-to-troubleshoot-ac-motors-with-a-circuit-tester#comments-listing)

 Topics: [AC Motors](https://blog.orientalmotor.com/topic/ac-motors), [Troubleshooting](https://blog.orientalmotor.com/topic/troubleshooting)

## [What Does a Capacitor Do?](https://blog.orientalmotor.com/what-does-a-capacitor-do)

 Posted by [Johann Tang](https://blog.orientalmotor.com/author/johann-tang) on Dec 26, 2019, 4:55:25 PM

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[![](https://blog.orientalmotor.com/hubfs/AC%20motor%20and%20capacitor-1.jpg)](https://blog.orientalmotor.com/what-does-a-capacitor-do)

For a permanent-split capacitor type AC motor (also known as capacitor start and run AC motors), a capacitor is required for proper operation.  Enjoy a cup of coffee as we explain why.

[Read More](https://blog.orientalmotor.com/what-does-a-capacitor-do)

 18 Comments [Click here to read/write comments](https://blog.orientalmotor.com/what-does-a-capacitor-do#comments-listing)

 Topics: [AC Motors](https://blog.orientalmotor.com/topic/ac-motors)

## [Show & Tell: AC Reversible Motors and AC Electromagnetic Brake Motors](https://blog.orientalmotor.com/show-tell-ac-reversible-motors-ac-electromagnetic-brake-motors)

 Posted by [Johann Tang](https://blog.orientalmotor.com/author/johann-tang) on Nov 21, 2019, 8:38:57 PM

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[![Load Elevator](https://www.orientalmotor.com/images/applications/a_lift.gif)](https://blog.orientalmotor.com/show-tell-ac-reversible-motors-ac-electromagnetic-brake-motors)

AC motors have the same operating theory, but by changing its design a little, you can modify its characteristics to suit certain applications better.  In the last post, I focused on AC induction motors for unidirectional applications.  In this post, I will explain what makes AC reversible motors and AC electromagnetic brake motors ideal for start/stop, reversing, or vertical applications, and demonstrate how to operate them.

[Read More](https://blog.orientalmotor.com/show-tell-ac-reversible-motors-ac-electromagnetic-brake-motors)

 2 Comments [Click here to read/write comments](https://blog.orientalmotor.com/show-tell-ac-reversible-motors-ac-electromagnetic-brake-motors#comments-listing)

 Topics: [AC Motors](https://blog.orientalmotor.com/topic/ac-motors), [VIDEOS](https://blog.orientalmotor.com/topic/videos)

## [Show & Tell: AC Induction Motors](https://blog.orientalmotor.com/show-tell-ac-induction-motors)

 Posted by [Johann Tang](https://blog.orientalmotor.com/author/johann-tang) on Oct 31, 2019, 8:50:19 PM

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[![One-way Conveyor](https://www.orientalmotor.com/images/applications/a_conveyor2.gif)](https://blog.orientalmotor.com/show-tell-ac-induction-motors)

AC motors are simple to control, rugged, and cost effective for general purpose applications.  These reasons are why they are the most popular type of electric motor across various industries.  In this post, we will briefly introduce induction motors and demonstrate how to operate these motors.

[Read More](https://blog.orientalmotor.com/show-tell-ac-induction-motors)

 2 Comments [Click here to read/write comments](https://blog.orientalmotor.com/show-tell-ac-induction-motors#comments-listing)

 Topics: [AC Motors](https://blog.orientalmotor.com/topic/ac-motors), [VIDEOS](https://blog.orientalmotor.com/topic/videos)

## [Eliminate Motor Speed Fluctuations Caused By Input Voltage or Load Variance](https://blog.orientalmotor.com/eliminate-motor-speed-fluctuations-due-to-input-voltage-or-load-variance)

 Posted by [Johann Tang](https://blog.orientalmotor.com/author/johann-tang) on Jun 21, 2019, 6:57:39 PM

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[![Eliminate Motor Speed Fluctuations Caused By Input Voltage or Load Variance](https://blog.orientalmotor.com/hubfs/AC%20motor%20speed%20torque%20curve%20affected%20by%20input%20voltage.jpg)](https://blog.orientalmotor.com/eliminate-motor-speed-fluctuations-due-to-input-voltage-or-load-variance)

An AC motor can be simple to use, but its speed changes according to the size of the load or amount of voltage supplied.  For an application where keeping a uniform speed is important, there is another type of motor that can improve performance.

[Read More](https://blog.orientalmotor.com/eliminate-motor-speed-fluctuations-due-to-input-voltage-or-load-variance)

 4 Comments [Click here to read/write comments](https://blog.orientalmotor.com/eliminate-motor-speed-fluctuations-due-to-input-voltage-or-load-variance#comments-listing)

 Topics: [AC Motors](https://blog.orientalmotor.com/topic/ac-motors), [Speed Control](https://blog.orientalmotor.com/topic/speed-control), [VIDEOS](https://blog.orientalmotor.com/topic/videos), [BLDC Motors](https://blog.orientalmotor.com/topic/bldc-motors), [Application Examples](https://blog.orientalmotor.com/topic/application-examples)

## [Improving Stop Accuracy for Start/Stop Conveyors](https://blog.orientalmotor.com/improving-stop-accuracy-for-start/stop-conveyors)

 Posted by [Johann Tang](https://blog.orientalmotor.com/author/johann-tang) on May 7, 2019, 1:32:29 PM

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[![CVK-SC sensor stop conveyor](https://blog.orientalmotor.com/hubfs/CVK-SC%20sensor%20stop%20conveyor.jpg)](https://blog.orientalmotor.com/improving-stop-accuracy-for-start/stop-conveyors)

Are you using motors for a start/stop conveyor or similar application?  While AC motors are a common choice for conveyors, there is a unique speed control motor solution available that could improve stop accuracy as well as reduce footprint and cost of machine designs.

[Read More](https://blog.orientalmotor.com/improving-stop-accuracy-for-start/stop-conveyors)

 0 Comments [Click here to read/write comments](https://blog.orientalmotor.com/improving-stop-accuracy-for-start/stop-conveyors#comments-listing)

 Topics: [AC Motors](https://blog.orientalmotor.com/topic/ac-motors), [Stepper Motors](https://blog.orientalmotor.com/topic/stepper-motors), [Speed Control](https://blog.orientalmotor.com/topic/speed-control), [VIDEOS](https://blog.orientalmotor.com/topic/videos), [Application Examples](https://blog.orientalmotor.com/topic/application-examples), [Conveyors](https://blog.orientalmotor.com/topic/conveyors), [Incremental Positioning](https://blog.orientalmotor.com/topic/incremental-positioning), [Factory Automation](https://blog.orientalmotor.com/topic/factory-automation)

## [Better Motor Alternatives for Variable Speed Pumps](https://blog.orientalmotor.com/better-motor-alternatives-for-variable-speed-pumps)

 Posted by [Johann Tang](https://blog.orientalmotor.com/author/johann-tang) on May 6, 2019, 8:03:26 PM

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[![Pump with BL motor](https://blog.orientalmotor.com/hubfs/Pump%20with%20BL%20motor.jpg)](https://blog.orientalmotor.com/better-motor-alternatives-for-variable-speed-pumps)

What motors do you use for pumps?  For variable speed pump applications that typically use 3-phase AC induction motors with variable frequency drives (VFDs), there is another type of motor that can transfer fluids more consistently and help reduce footprint.

[Read More](https://blog.orientalmotor.com/better-motor-alternatives-for-variable-speed-pumps)

 0 Comments [Click here to read/write comments](https://blog.orientalmotor.com/better-motor-alternatives-for-variable-speed-pumps#comments-listing)

 Topics: [AC Motors](https://blog.orientalmotor.com/topic/ac-motors), [Speed Control](https://blog.orientalmotor.com/topic/speed-control), [VIDEOS](https://blog.orientalmotor.com/topic/videos), [BLDC Motors](https://blog.orientalmotor.com/topic/bldc-motors), [Pumps](https://blog.orientalmotor.com/topic/pumps), [Application Examples](https://blog.orientalmotor.com/topic/application-examples), [Medical](https://blog.orientalmotor.com/topic/medical)

## [Right Angle Gearheads: Why are Hypoid Gears Better Than Worm Gears?](https://blog.orientalmotor.com/hypoid-better-than-worm-right-angle-gearheads)

 Posted by [Johann Tang](https://blog.orientalmotor.com/author/johann-tang) on Apr 17, 2019, 10:00:00 AM

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[![Hypoid vs worm efficiency graph](https://blog.orientalmotor.com/hubfs/Hypoid%20vs%20worm%20efficiency%20graph.jpg)](https://blog.orientalmotor.com/hypoid-better-than-worm-right-angle-gearheads)

As efficiency becomes increasingly important, another type of gear is being adopted for right-angle gearheads over the common worm gears.

[Read More](https://blog.orientalmotor.com/hypoid-better-than-worm-right-angle-gearheads)

 4 Comments [Click here to read/write comments](https://blog.orientalmotor.com/hypoid-better-than-worm-right-angle-gearheads#comments-listing)

 Topics: [AC Motors](https://blog.orientalmotor.com/topic/ac-motors), [Speed Control](https://blog.orientalmotor.com/topic/speed-control), [BLDC Motors](https://blog.orientalmotor.com/topic/bldc-motors), [Gearheads](https://blog.orientalmotor.com/topic/gearheads)

## [Easily Synchronize Speeds of Multiple Motors](https://blog.orientalmotor.com/motor-challenge-3-synchronizing-speeds-of-two-motors)

 Posted by [Johann Tang](https://blog.orientalmotor.com/author/johann-tang) on Oct 15, 2018, 9:00:00 AM

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[![Grip conveyor with 2 BL motors](https://blog.orientalmotor.com/hubfs/Grip%20conveyor%20with%202%20BL%20motors.jpg)](https://blog.orientalmotor.com/motor-challenge-3-synchronizing-speeds-of-two-motors)

There are a variety of ways to synchronize the speed of multiple motors.  In this blog post, we will explain another advantage of using brushless motors systems, which is its ability to set speeds accurately and be able to synchronize speeds on multiple axes easily .  Brushless motors utilize built-in hall-effect sensors to regulate speed.  Even if the load, input voltage, or temperature fluctuates, the speed regulation will always be under +/-0.2% or better.

[Read More](https://blog.orientalmotor.com/motor-challenge-3-synchronizing-speeds-of-two-motors)

 4 Comments [Click here to read/write comments](https://blog.orientalmotor.com/motor-challenge-3-synchronizing-speeds-of-two-motors#comments-listing)

 Topics: [AC Motors](https://blog.orientalmotor.com/topic/ac-motors), [Speed Control](https://blog.orientalmotor.com/topic/speed-control), [VIDEOS](https://blog.orientalmotor.com/topic/videos), [BLDC Motors](https://blog.orientalmotor.com/topic/bldc-motors), [Washdown](https://blog.orientalmotor.com/topic/washdown), [Application Examples](https://blog.orientalmotor.com/topic/application-examples), [Medical](https://blog.orientalmotor.com/topic/medical), [Food & Packaging](https://blog.orientalmotor.com/topic/food-packaging), [Grip Conveyors](https://blog.orientalmotor.com/topic/grip-conveyors), [Conveyors](https://blog.orientalmotor.com/topic/conveyors)

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#### About Us

Oriental Motor offers an extensive product line-up of about 50,000 different products that provide the optimal motion system. For over a century we have concentrated on technological advancement and product design improvement. This emphasis is evident in the sophisticated devices that we market today. Oriental Motor's sales and service network is international, with offices throughout North America, Europe and Asia.

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