Mô tả

This course is bootcamp for push button 3 phase motor controls.

Learn how to design and wire up 7 essential 3 phase motor control circuits.

In this course we will learn about 3 phase squirrel cage motors and the different ways of connecting them. We will learn about contactors, thermal overloads, relays, circuit protection, indicator lights, push buttons, an off delay timer relay, an on delay timer relay, a power supply and a dc injection brake. We will look at how all these parts work and how they are used in conjunction with each other to control 3 phase motors.

The first circuit we look at is the staple of motor controls, the DOL starter. We start off nice and easy by designing the power circuit. The power circuit is the base that we will work from for all of our circuits in the course. We will explain the characteristics of the power circuit and then build up the control circuit step by step, lesson by lesson, until we end up with a fully functioning DOL starter for a 3 phase motor. After we have designed our DOL circuit we will then wire it up from scratch and check it's operation.

Like the DOL starter, we will comprehensively learn another 6 motor control circuits such as reverse, on delay, off delay, star/delta, various mixed voltage circuits and a dc injection braking circuit. We look at some practical applications for these circuits and we also discuss some of the different ways to design them. To keep things fresh we will mix up the supply voltages, so that no matter where you come from around the world the skills learnt in this course will be easily transferable.

If you're keen on learning 3 phase motor controls, get your pen ready so we can start drawing up the control circuits together!

What is covered in the course:

  • Introduction: Different supply voltages, schematics.

  • Learn the parts: 3 phase squirrel cage induction motor, contactors, thermal overloads, relays, circuit protection, push buttons, indicator lights, power supply, off delay timer relay, on delay timer relay, dc injection brake.

  • Control circuit design, wiring and operation: DOL, reverse, on delay, off delay, start/delta, mixed voltage, dc injection braking.

Are you ready to upskill?

Bạn sẽ học được gì

How to design and wire up 7 essential 3 phase motor control circuits, push button operated.

DOL, reverse, on delay, off delay, star/delta, mixed voltage, DC injection braking.

3 phase squirrel cage motor characteristics and connections.

How the parts that make up motor control systems operate and how they are used in a circuit.

The difference between star and delta formations.

Yêu cầu

  • Some prior knowledge of AC electric circuits and motors would help but it's not critical.
  • Basic knowledge of simple power formulas and ohms law.
  • The difference between voltage and current.
  • An understanding of normally open and normally closed contacts is ideal but not critical.
  • Understand the difference between 3 phase and single phase voltages and connections. We go over it briefly at the start.

Nội dung khoá học

11 sections

Introduction

1 lectures
Course Introduction
02:46

Getting Started

2 lectures
Getting Started - Voltages
06:08
Getting Started - Schematics
02:06

Learning The Parts

8 lectures
Learning The Parts - 3 Phase Motor
04:39
Learning The Parts - 3 Phase Motor Connections
06:26
Learning The Parts - Contactor
05:08
Learning The Parts - Overload
06:20
Learning The Parts - Circuit Protection
02:34
Learning The Parts - Relays
05:53
Learning The Parts - Push Buttons
02:53
Learning The Parts - Indicator Lights
01:54

DOL

18 lectures
DOL - Introduction
01:11
DOL - Power - Schematic
04:15
Basic Control - Schematic (Inch)
02:52
DOL - Power & Basic Control - Wiring
05:02
DOL - Power & Basic Control - Operation
02:56
DOL - Hold In Contract - Schematic
03:23
DOL - Hold In Contract - Wiring
01:33
DOL - Hold In Contract - Operation
01:26
DOL - Emergency Stop - Schematic
03:03
DOL - Emergency Stop - Wiring
01:29
DOL - Emergency Stop - Operation
00:48
DOL - Indicator Lights - Schematic
03:56
DOL - Indicator Lights - Wiring
01:53
DOL - Indicator Lights - Operation
02:15
DOL - No Neutral! - Schematic
02:58
DOL - No Neutral! - Wiring & Operation
02:29
DOL - Missing Parts!
00:13
Quick Tip - Overloads
00:50

Reverse

11 lectures
Reverse - Introduction
00:52
Reverse - Power - Schematic
03:53
Reverse - Missing Parts & Wiring!
00:12
Reverse - Control - Schematic
04:57
Reverse - Power - Wiring
02:41
Reverse - Control - Wiring
03:52
Reverse - Operation
02:09
Reverse - Indicator Lights - Schematic
02:04
Reverse - Indicator Lights - Wiring
02:23
Reverse - Indicator Lights - Operation
00:45
Reverse - Quiz
3 questions

On Delay

9 lectures
On Delay - Introduction
01:09
On Delay - New Part
04:24
On Delay - Schematic
02:39
On Delay - Wiring
01:55
On Delay - Operation
01:00
On Delay - Hold In Contact & Indicator Lights - Schematic
01:41
On Delay - Hold In Contact & Indicator Lights - Wiring
00:56
On Delay - Hold In Contact & Indicator Lights - Operation
00:38
On Delay - Missing Wiring!
00:21

Off Delay

10 lectures
Off Delay - Introduction
01:31
Off Delay - New Part
04:28
Off Delay - Schematic
05:43
Off Delay - Wiring
02:17
Off Delay - Operation
02:25
Off Delay - Quiz
3 questions
Off Delay - Indicator Lights - Schematic
01:42
Off Delay - Indicator Lights - Wiring
00:42
Off Delay - Indicator Lights - Operation
00:53
Off Delay - Strange Circuit!
00:10

Star/Delta

16 lectures
Star/Delta - Introduction
04:37
Star/Delta - Why?
03:07
Star/Delta - Rules
02:09
Star/Delta - Connections
05:17
Star/Delta - Power - Schematic
04:21
Star/Delta - Control - Schematic
05:42
Star/Delta - How It Works
02:52
Star/Delta - Quiz
5 questions
Star/Delta - Power - Wiring
02:56
Star/Delta - Control - Wiring
03:29
Star/Delta - Operation
02:10
Quick Tip - D Class Protection
00:49
Star/Delta - Indicator Lights - Schematic
00:43
Star/Delta - Indicator Lights - Wiring
01:00
Star/Delta - Indicator Lights - Operation
03:40
Star/Delta - Incomplete Circuit
00:11

Mixed Voltage Circuits

7 lectures
Mixed Voltage Circuits - Introduction
01:12
Mixed Voltage Circuits - New Part
01:53
Mixed Voltage Circuits - 1st Schematic
03:36
Mixed Voltage Circuits - 2nd Schematic
05:20
Mixed Voltage Circuits - 2nd Schematic - Wiring
05:01
Mixed Voltage Circuits - 2nd Schematic - Operation
02:05
Mixed Voltage Circuits - 3rd Schematic
03:03

DC Injection Braking

11 lectures
DC Injection Brake - Introduction
02:03
DC Injection Brake - How?
01:37
DC Injection Brake - New Part
04:04
DC Injection Brake - Power - Schematic
02:29
DC Injection Brake - Control - Schematic
05:29
DC Injection Brake - Brake Variations
01:40
DC Injection Brake - Brake Selection
03:36
DC Injection Brake - Power - Wiring
04:40
DC Injection Braking - Quiz
3 questions
DC Injection Brake - Control - Wiring
03:08
DC Injection Brake - Operation
03:17

Congratulations!

1 lectures
Sign Out!
00:20

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