# \#motor **URL:** https://forumautomation.com/tag/motor/56.md [Latest](https://forumautomation.com/latest.md) · [Categories](https://forumautomation.com/categories.md) · [Tags](https://forumautomation.com/tags.md) --- ## [Star-Delta Starter with PLC Control: Motor Starting and Control Logic](https://forumautomation.com/t/star-delta-starter-with-plc-control-motor-starting-and-control-logic/14562)
**Author:** [@Rabert](https://forumautomation.com/u/Rabert)\ **Replies:** 0\ **Last updated:** [October 30, 2026, 1:50pm UTC](https://forumautomation.com/t/star-delta-starter-with-plc-control-motor-starting-and-control-logic/14562 "2026-10-30T13:50:18Z")
Understand the working principle of a PLC-controlled Star-Delta starter used for three-phase squirrel-cage induction motors. This motor starting method reduces the initial line current by connecting the motor windings in… --- ## [Motor Protection](https://forumautomation.com/t/motor-protection/14524)
**Author:** [@Rabert](https://forumautomation.com/u/Rabert)\ **Replies:** 0\ **Last updated:** [October 20, 2026, 8:36am UTC](https://forumautomation.com/t/motor-protection/14524 "2026-10-20T08:36:39Z")
Motor Protection Motor protection systems are essential to keep electric motors running safely, efficiently, and reliably. They help prevent damage, downtime, and costly repairs by detecting abnormal conditions early. P… --- ## [Is it possible for a single-phase motor to operate without an inverter?](https://forumautomation.com/t/is-it-possible-for-a-single-phase-motor-to-operate-without-an-inverter/12681)
**Author:** [@Rabert](https://forumautomation.com/u/Rabert)\ **Replies:** 0\ **Last updated:** [October 9, 2024, 2:18pm UTC](https://forumautomation.com/t/is-it-possible-for-a-single-phase-motor-to-operate-without-an-inverter/12681 "2024-10-09T14:18:35Z")
A single-phase motor does not require an inverter because it is its intended to run directly on single-phase alternating current. However, using an inverter can have some advantages, especially in cases where speed contr… --- ## [Types of DC motors and why do we need DC motors](https://forumautomation.com/t/types-of-dc-motors-and-why-do-we-need-dc-motors/6680)
**Author:** [@ashlin](https://forumautomation.com/u/ashlin)\ **Replies:** 0\ **Last updated:** [July 5, 2019, 5:54pm UTC](https://forumautomation.com/t/types-of-dc-motors-and-why-do-we-need-dc-motors/6680 "2019-07-05T17:54:54Z")
Introduction to DC motor An electric motor is a machine which converts electrical energy into mechanical energy, DC motor is very similar to the DC generator. The difference between a DC motor and a generator is, the ge… --- ## [What causes Motor Overheating?](https://forumautomation.com/t/what-causes-motor-overheating/14436)
**Author:** [@Rabert](https://forumautomation.com/u/Rabert)\ **Replies:** 0\ **Last updated:** [September 22, 2026, 2:52am UTC](https://forumautomation.com/t/what-causes-motor-overheating/14436 "2026-09-22T02:52:35Z")
What Causes Motor Overheating? Motor overheating is one of the most common causes of equipment failure in industrial plants. It occurs when the motor generates more heat than it can dissipate, leading to insulation damag… --- ## [How is Motor Power Factor Calculated?](https://forumautomation.com/t/how-is-motor-power-factor-calculated/14327)
**Author:** [@Rabert](https://forumautomation.com/u/Rabert)\ **Replies:** 0\ **Last updated:** [August 19, 2026, 3:47pm UTC](https://forumautomation.com/t/how-is-motor-power-factor-calculated/14327 "2026-08-19T15:47:04Z")
What is Motor Power Factor? Motor power factor (PF) indicates how effectively an AC motor converts the supplied electrical power into useful active power. It is the ratio of real power (kW) to apparent power (kVA). M… --- ## [What is a Servo Motor? Basics, Advantages and Disadvantages](https://forumautomation.com/t/what-is-a-servo-motor-basics-advantages-and-disadvantages/3186)
**Author:** [@sivaranjith](https://forumautomation.com/u/sivaranjith)\ **Replies:** 0\ **Last updated:** [February 24, 2018, 6:04pm UTC](https://forumautomation.com/t/what-is-a-servo-motor-basics-advantages-and-disadvantages/3186 "2018-02-24T18:04:22Z")
What is a Servo motor? A servo is a small device which has an output shaft which positions on coded signal. It is a rotary or linear actuator that allows for precise control of angular or linear position, velocity and … --- ## [What is duty cycle of electrical motor?](https://forumautomation.com/t/what-is-duty-cycle-of-electrical-motor/1157)
**Author:** [@denizen](https://forumautomation.com/u/denizen)\ **Replies:** 1\ **Last updated:** [July 9, 2016, 5:07pm UTC](https://forumautomation.com/t/what-is-duty-cycle-of-electrical-motor/1157 "2016-07-09T17:07:27Z")
Duty Cycle In NEMA world,typically duty cycle is referred to in one of two terms: Continuous or intermittent For IEC SI - Continuous duty The motor works at constant load for enough time to reach temperature equil… --- ## [How Does Voltage Unbalance affect a 3 Phase Induction Motor?](https://forumautomation.com/t/how-does-voltage-unbalance-affect-a-3-phase-induction-motor/14271)
**Author:** [@Rabert](https://forumautomation.com/u/Rabert)\ **Replies:** 0\ **Last updated:** [July 23, 2026, 2:16pm UTC](https://forumautomation.com/t/how-does-voltage-unbalance-affect-a-3-phase-induction-motor/14271 "2026-07-23T14:16:55Z")
How Does Voltage Unbalance affect a 3 Phase Induction Motor? Why Voltage Unbalance Important? Even a small voltage unbalance can significantly reduce the performance and lifespan of a 3 phase induction motor. Because cu… --- ## [Types of AC motors, applications and disadvantages](https://forumautomation.com/t/types-of-ac-motors-applications-and-disadvantages/5169)
**Author:** [@divyasree](https://forumautomation.com/u/divyasree)\ **Replies:** 0\ **Last updated:** [November 12, 2018, 3:41am UTC](https://forumautomation.com/t/types-of-ac-motors-applications-and-disadvantages/5169 "2018-11-12T03:41:20Z")
Machines that convert electrical energy o mechanical force is called motor. Depending on the type of electrical input that is used, it can be either dc or ac motor. Motors work on the principle of electromagnetic inducti… --- ## [Type of Motor Protection](https://forumautomation.com/t/type-of-motor-protection/14129)
**Author:** [@Rabert](https://forumautomation.com/u/Rabert)\ **Replies:** 0\ **Last updated:** [May 28, 2026, 6:01pm UTC](https://forumautomation.com/t/type-of-motor-protection/14129 "2026-05-28T18:01:28Z")
Type of Motor Protection Different Types of Motor Protection are: Overload Protection Short-Circuit Protection Ground Fault (Earth Fault) Protection Phase Failure (Single Phasing) Protection Phase Sequence… --- ## [Motor Megger Testing Procedure](https://forumautomation.com/t/motor-megger-testing-procedure/13831)
**Author:** [@Rabert](https://forumautomation.com/u/Rabert)\ **Replies:** 0\ **Last updated:** [January 16, 2026, 2:29pm UTC](https://forumautomation.com/t/motor-megger-testing-procedure/13831 "2026-01-16T14:29:23Z")
Motor Megger Testing Procedure Objective To check the health of motor insulation between: Phase to Phase Phase to Earth (Body) Winding to winding (for higher voltage motors) Test Equipment Required Insulation Resista… --- ## [Types of Electric Braking in DC Motor](https://forumautomation.com/t/types-of-electric-braking-in-dc-motor/6038)
**Author:** [@ashlin](https://forumautomation.com/u/ashlin)\ **Replies:** 0\ **Last updated:** [March 7, 2019, 4:33pm UTC](https://forumautomation.com/t/types-of-electric-braking-in-dc-motor/6038 "2019-03-07T16:33:12Z")
ELECTRIC BRAKING Electric braking is the process by which a running motor can be brought to rest smooth braking of the motors can be achieved by the electric braking it uses the electric curre… --- ## [How do you determine locked rotor current (LRC) of an induction motor? How is it different from other motors?](https://forumautomation.com/t/how-do-you-determine-locked-rotor-current-lrc-of-an-induction-motor-how-is-it-different-from-other-motors/13943)
**Author:** [@Rabert](https://forumautomation.com/u/Rabert)\ **Replies:** 0\ **Last updated:** [March 17, 2026, 6:45am UTC](https://forumautomation.com/t/how-do-you-determine-locked-rotor-current-lrc-of-an-induction-motor-how-is-it-different-from-other-motors/13943 "2026-03-17T06:45:57Z")
Process to Determine Locked Rotor Current (LRC) Lock the Rotor Physically prevent the rotor from rotating. Apply Reduced Voltage Apply low voltage (to avoid damage) at rated frequency. Measure Current Use an ammeter or… --- ## [Why Electric Motors keep burning in Industries?](https://forumautomation.com/t/why-electric-motors-keep-burning-in-industries/13923)
**Author:** [@Rabert](https://forumautomation.com/u/Rabert)\ **Replies:** 0\ **Last updated:** [March 6, 2026, 10:12am UTC](https://forumautomation.com/t/why-electric-motors-keep-burning-in-industries/13923 "2026-03-06T10:12:26Z")
In many industrial facilities repeated motor failures are often blamed on manufacturing defects. However practical experience shows that most electric motor burnouts occur due to installation mistakes, incorrect operati… --- ## [When using an Induction Motor? Why is a Star Delta starter preferred?](https://forumautomation.com/t/when-using-an-induction-motor-why-is-a-star-delta-starter-preferred/11484)
**Author:** [@Rabert](https://forumautomation.com/u/Rabert)\ **Replies:** 0\ **Last updated:** [September 20, 2023, 5:23pm UTC](https://forumautomation.com/t/when-using-an-induction-motor-why-is-a-star-delta-starter-preferred/11484 "2023-09-20T17:23:39Z")
When a motor is initially connected in the star delta starting, its phase voltage is 58% of the line voltage. Motor current is decreased as a result of the reduced voltage. As a result of the reduced current, the motor … --- ## [What is the Normally Permitted Motor Ratings as per DEWA?](https://forumautomation.com/t/what-is-the-normally-permitted-motor-ratings-as-per-dewa/13801)
**Author:** [@Rabert](https://forumautomation.com/u/Rabert)\ **Replies:** 0\ **Last updated:** [December 29, 2025, 3:05pm UTC](https://forumautomation.com/t/what-is-the-normally-permitted-motor-ratings-as-per-dewa/13801 "2025-12-29T15:05:17Z")
What is the Normally Permitted Motor Ratings as per DEWA? Motor ratings are regulated by the Dubai Electricity and Water Authority (DEWA) to minimize starting current, voltage drop and system disturbance. The typically p… --- ## [Why is the star delta starter used for induction motors?](https://forumautomation.com/t/why-is-the-star-delta-starter-used-for-induction-motors/11265)
**Author:** [@Rabert](https://forumautomation.com/u/Rabert)\ **Replies:** 0\ **Last updated:** [June 24, 2023, 1:48pm UTC](https://forumautomation.com/t/why-is-the-star-delta-starter-used-for-induction-motors/11265 "2023-06-24T13:48:41Z")
When a motor is connected in star delta starting point, the phase voltage is 58% of the line voltage. Motor current is decreased as a result of the lower voltage. As a result of the lower current, the motor starts more r… --- ## [Weekly Maintenance Checklist for Electric Motors](https://forumautomation.com/t/weekly-maintenance-checklist-for-electric-motors/13784)
**Author:** [@Rabert](https://forumautomation.com/u/Rabert)\ **Replies:** 0\ **Last updated:** [December 18, 2025, 11:59am UTC](https://forumautomation.com/t/weekly-maintenance-checklist-for-electric-motors/13784 "2025-12-18T11:59:54Z")
Weekly Maintenance Checklist for Electric Motors To maintain the performance & longevity of electric motors conduct following weekly maintenance steps: 1). Visual Inspection Check the motor and wiring for evidence of… --- ## [What happens when a 3-Phase 3 HP Motor is operated on a Single Phase?](https://forumautomation.com/t/what-happens-when-a-3-phase-3-hp-motor-is-operated-on-a-single-phase/13770)
**Author:** [@Rabert](https://forumautomation.com/u/Rabert)\ **Replies:** 0\ **Last updated:** [December 12, 2025, 11:55am UTC](https://forumautomation.com/t/what-happens-when-a-3-phase-3-hp-motor-is-operated-on-a-single-phase/13770 "2025-12-12T11:55:00Z")
When a 3-Phase 3 HP Motor is operated on a Single Phase the following factors can occur: Loss of Rotating Magnetic Field A three-phase motor uses 3 phase-shifted currents to generate a smooth spinning magnetic field. W… --- ## [What is the purpose of a Universal Motor?](https://forumautomation.com/t/what-is-the-purpose-of-a-universal-motor/9855)
**Author:** [@instrumentationtechi](https://forumautomation.com/u/instrumentationtechi)\ **Replies:** 1\ **Last updated:** [September 14, 2021, 11:20am UTC](https://forumautomation.com/t/what-is-the-purpose-of-a-universal-motor/9855 "2021-09-14T11:20:39Z")
Explain the need for universal motor --- ## [APPLICATION OF AC INDUCTION MOTOR](https://forumautomation.com/t/application-of-ac-induction-motor/6187)
**Author:** [@ashlin](https://forumautomation.com/u/ashlin)\ **Replies:** 0\ **Last updated:** [April 3, 2019, 9:10am UTC](https://forumautomation.com/t/application-of-ac-induction-motor/6187 "2019-04-03T09:10:05Z")
USAGE OF AC INDUCTION MOTOR AC induction motor is a user-friendly motor it is cheap and low maintenance it could directly connect to the AC source it is mainly used in powered home appliances and i… --- ## [15 Different Types of Electric Motors & their Uses](https://forumautomation.com/t/15-different-types-of-electric-motors-their-uses/13711)
**Author:** [@Rabert](https://forumautomation.com/u/Rabert)\ **Replies:** 0\ **Last updated:** [November 13, 2025, 11:17am UTC](https://forumautomation.com/t/15-different-types-of-electric-motors-their-uses/13711 "2025-11-13T11:17:37Z")
15 Different Types of Electric Motors & their Uses Electric motors are an essential part of our daily lives. Each motor has its own unique characteristics and application making them highly effective in various machiner… --- ## [What is the difference between star and delta connection?](https://forumautomation.com/t/what-is-the-difference-between-star-and-delta-connection/9788)
**Author:** [@instrumentationtechi](https://forumautomation.com/u/instrumentationtechi)\ **Replies:** 2\ **Last updated:** [October 24, 2025, 3:55pm UTC](https://forumautomation.com/t/what-is-the-difference-between-star-and-delta-connection/9788 "2025-10-24T15:55:09Z")
Explain how a star connection is different from a delta connection --- ## [How Wound Rotor Motor differ from other Motors?](https://forumautomation.com/t/how-wound-rotor-motor-differ-from-other-motors/6335)
**Author:** [@Ashlin.aj](https://forumautomation.com/u/Ashlin.aj)\ **Replies:** 0\ **Last updated:** [May 3, 2019, 5:33pm UTC](https://forumautomation.com/t/how-wound-rotor-motor-differ-from-other-motors/6335 "2019-05-03T17:33:54Z")
WOUND ROTOR MOTOR Wound rotor motor is an induction motor which was developed for variable speed applications it is also called a slip ring AC motor. This 3-phase induction motor has high start… --- ## [Why Motor never runs exactly at Synchronous Speed?](https://forumautomation.com/t/why-motor-never-runs-exactly-at-synchronous-speed/13613)
**Author:** [@Rabert](https://forumautomation.com/u/Rabert)\ **Replies:** 0\ **Last updated:** [October 8, 2025, 12:22pm UTC](https://forumautomation.com/t/why-motor-never-runs-exactly-at-synchronous-speed/13613 "2025-10-08T12:22:52Z")
Why Motor never runs exactly at Synchronous Speed? A motor will never run exactly at synchronous speed (unless in the setting of a synchronous motor under perfect conditions) due to fundamental physical & electrical phen… --- ## [Why selecting the right Cable Size for Motors is Important?](https://forumautomation.com/t/why-selecting-the-right-cable-size-for-motors-is-important/13232)
**Author:** [@Rabert](https://forumautomation.com/u/Rabert)\ **Replies:** 0\ **Last updated:** [May 14, 2025, 8:17am UTC](https://forumautomation.com/t/why-selecting-the-right-cable-size-for-motors-is-important/13232 "2025-05-14T08:17:42Z")
Why selecting the right Cable Size for Motors is Important? Choosing the right cable size is essential for motor design and installation, since it impacts safety, efficiency, & performance. Using excessively small cabl… --- ## [What is Universal Motor?](https://forumautomation.com/t/what-is-universal-motor/1189)
**Author:** [@denizen](https://forumautomation.com/u/denizen)\ **Replies:** 0\ **Last updated:** [July 23, 2016, 3:53pm UTC](https://forumautomation.com/t/what-is-universal-motor/1189 "2016-07-23T15:53:12Z")
Universal Motor The motor which can be operated on ac as well as dc supply is called as universal motor. These are small HP motors Application of Universal Motor - Washing machine,mixer,food processor,drilling machine… --- ## [How to run multiple motors by using a single VFD?](https://forumautomation.com/t/how-to-run-multiple-motors-by-using-a-single-vfd/10326)
**Author:** [@Ajmal\_ismail](https://forumautomation.com/u/Ajmal_ismail)\ **Replies:** 0\ **Last updated:** [April 8, 2022, 5:08am UTC](https://forumautomation.com/t/how-to-run-multiple-motors-by-using-a-single-vfd/10326 "2022-04-08T05:08:03Z")
What is VFD? VFD stands for Variable Frequency Drive. It is a device that is designed to regulate the consumption of power to the motors. Click here to know more Can we connect multiple motors using a single VFD? Act… --- ## [What is a Shaded Pole Induction Motor?](https://forumautomation.com/t/what-is-a-shaded-pole-induction-motor/13285)
**Author:** [@Rabert](https://forumautomation.com/u/Rabert)\ **Replies:** 0\ **Last updated:** [May 29, 2025, 3:39pm UTC](https://forumautomation.com/t/what-is-a-shaded-pole-induction-motor/13285 "2025-05-29T15:39:38Z")
What is a Shaded Pole Induction Motor? A shaded pole motor is a type of self-starting, single-phase induction motor where a portion of a pole is shaded by a copper ring, creating a rotating magnetic field. This “shade… [Next page](https://forumautomation.com/tag/motor/56.md?match_all_tags=true&page=1&tags%5B%5D=motor)