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Learn MoreElectric Motor Control
Rating: 4.0 out of 54.0(123 ratings)
739 students
What you'll learn
- Design Electric Motor Control Circuits
Explore related topics
Course content
5 sections • 81 lectures • 5h 55m total length
- Promo0:10
Learn to design electric motor control circuits, while all circuits taught in this course are practical.
- Circuit Breakers11:02
- Fuses2:56
Explore how fuses protect motor circuits by opening on overcurrent, compare with circuit breakers, and review cartridge, cylindrical, and hrc fuse types with operating voltage, current rating, and braking capacity.
- Overload Relay5:52
- Push Button6:54
- Selector Switches3:41
- Contactor13:03
- Contactor Coil1:00
- Limit Switches5:20
- Limit Switch - Connection1:22
- Relay11:44
Understand how relays use normally open and normally closed contacts, coils, and armatures to control power circuits; learn relay symbol, standard contact numbering, and basic control circuits with start-stop actions.
- Timer6:55
Explore timing relays in control circuits, focusing on on delay timer and delay timer functions, using coils and contacts to create delays.
- over-current relay , over-voltage and under-voltage relay13:04
Protect electric motors with overload, over-current, over-voltage, and under-voltage relays that sense abnormal conditions and trip the circuit breaker to prevent damage.
- Pressure Switches6:12
- Float Switches2:49
- Flow Switches4:43
Explore flow switches that detect air or liquid movement using reed contacts and normally open/closed configurations, wired to alarms to signal no-flow conditions.
- Proximity Sensors6:03
- Photoelectric Sensors1:38
- Solenoid Valve3:02
- Motor Full Load Current3:28
- Cable2:35
- Fuse2:16
Learn to select overcurrent protection for a squirrel cage induction motor using the National Electrical Code, sizing circuit breakers and fuses with 125 percent continuous load and time-delay factors.
- Circuit Breaker1:43
- Overload Protection1:22
- Contactor1:51
- Main Feeder2:18
- Main Circuit Breaker3:17
Select the main circuit breaker to protect the main feeder against overcurrent, using 125 percent and NEC guidelines to determine size and appropriate cable and protective device settings.
- Working Example1:09
- Transformer Selection2:18
Select the proper transformer size based on load estimation and total connected load. Apply demand and diversity factors, assess voltage drop, and plan power factor correction, derating, and future growth.
- Transformer Types1:51
Compare liquid immersive oil type transformers and dry type transformers, noting their tank and insulating liquid construction, indoor safety requirements, and oil type's lower losses and higher efficiency.
- Transformer Vector Group2:04
- Transformer Grounding1:05
- Circuit Breaker Selection2:28
- Cable Selection7:16
- Voltage Drop Test2:41
Perform a voltage drop test using loop current, 50 meter cable length, and five parallel 300 mm2 cables, yielding a 4.5% drop at the main distribution board.
- Short Circuit Test11:45
Calculate short-circuit current at the main distribution board using the impedance method, incorporating transformer and cable reactances, per-unit impedance, and system base power.
- Motor Power Circuit Practical Wiring7:26
- Single Motor Control Circuit Start/Stop From one Location9:25
- Control Circuit Start/Stop from one Location - Wiring3:33
Wire the control circuit from a single location using pushbutton start/stop, the circuit breaker and overload relay auxiliary contact, and connect the contactor coil to terminals 95–96 and 11–14.
- Execution Recommendations2:09
- Devices and Contacts Arrangement5:06
- Motor Operation With Indicators8:05
- Motor Operation With Indicators- Circuit Simulation1:08
Examine the motor control circuit from the previous lesson, explain why the bailout lamp stays on when the motor is disconnected, and show overload trip behavior.
- Motor Operation With Indicators - Practical Wiring5:41
- Control Panel Operating Voltage1:41
Operate the power circuit and control circuit at different voltage levels, including ac voltages from 200 to 600 v and dc voltages from 12 to 60 v, as shown.
- How To Get Voltage of The Control Circuit2:22
- Single Motor Start/Stop From Two Locations9:47
- conveyor Control Circuit1:54
- Automatic Water Pump Control Circuit3:08
- Single Motor Start/Stop From Three Locations2:31
Explore how a single motor uses a three-location start and three-location stop wiring, including series and parallel push buttons, normally closed auxiliary contacts, and momentary control for reliable motor control.
- Two Motors Power Circuit Practical Wiring4:52
- Two Motors Run Independently Circuit Design5:20
- Two Motors Stop Simultaneously in case of overload2:16
- Motor Can't Run until The another Run3:01
- Motor Disconnected automatically after operating the another1:59
- Motor Can't Stop Until Stop The another3:03
- Start Motor and Stop another at The Same Time5:51
Learn to design a dual-motor control circuit using a double push button, normally open and normally closed contacts, and a contactor to start one motor while stopping the other.
- Work on EKTS9:37
- Three Motors Each Starts After The Previous4:58
Design a three-motor control circuit with motor overload protection, enabling start/stop of any motor and sequential starting: motor 2 after motor 1, motor 3 after motor 2, via auxiliary contacts.
- Two Motors Start Automatically After The First3:28
- Reversing Motor Rotation14:16
Learn how to reverse a three-phase induction motor by swapping two phases and applying interlock between forward and reverse contactors in power and control circuits.
- Reversing Motor Rotation Control Circuit Reduced2:04
- Elevator Control Circuit - Design4:05
Design an elevator control circuit that uses a contactor and normally closed limit-switch contacts to auto stop at floors and reverse motor direction from forward to reverse using start buttons.
- Elevator Control Circuit - Simulation2:33
Explore an elevator control circuit simulation that uses forward and reverse motor rotation with a distance limit, interlocks, and limit switches to travel between floors.
- Single Phase Motor Control3:46
- Motor Braking Power Circuit4:48
- Motor Braking Control Circuit1:40
- motor starts after a period of time from running another motor4:04
Design a two-motor power and control circuit in which the second motor starts after a defined delay using a timer and contactors, with auxiliary contacts managing start and stop.
- Motor disconnects automatically after starting the another motor3:35
- Star and Delta Connection6:56
- Star Delta Motor Starter10:07
- Power in Start and Delta Connection13:25
- Star/Delta Terminals2:50
- Star/Delta Power and Control Circuit With Timer4:59
- Earthing System Definition0:50
- Types of Earthing Networks1:25
- TT Earthing System0:46
- IT Earthing System0:33
- TN Earthing System1:34
Explore the TN earthing system and how protective earth and neutral conductors integrate in three phase system, from protective areas to service head, ensuring earth and neutral separation.
- Components of Earthing System1:25
- PEC Selection2:25
Requirements
- No Requirements
Description
This course Electric Motor Control explain the fundamental concepts of designing and maintaining electrical control for the three phase induction motors.
Design simple and complex control circuits.
all circuits discussed in this course are practical.
first section electrical control and protective devices is about fundamental components of motor controls, devices that control the flow of current in circuits. circuit breakers , fuse , relays , switches , contactor and timers.
second section is about sizing electric motor panels.
third section is about electric control circuits.
Who this course is for:
- Electrical Power Engineers
- Automation Engineers
- Electrical Control Engineers
- Electrical Maintenance Engineers
- Electrical Engineering Students