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Instructor Guide Instructor Guide 214: Elevator: Electrical Systems Module 7: Drive Motor Circuits Elevator – Drive Motor Circuits Instructor’s Guide Table of Contents Overview……………………………………………………………………………………………..…..……....4 Drive Motors……………………………………………………………………………………………………14 Drive Power Circuits………………………………………………………………………………………….33 Motor Protection and Faults, Starters……………………………………………………………………..54 Wiring Configurations………………………………………………………………………………………...73 Motor Replacements…………………………………………………………………………………............82 Summary………………………………………………………………………………………………………..87 1 Elevator – Drive Motor Circuits Instructor’s Guide Icons Used In This Guide Agenda Topic # Topic Title Duration Overview 1 30 Minutes 2 Drive Motors 60 Minutes 3 Drive Power Circuits 60 Minutes 4 Field Trip 90 Minutes 5 Motor Protection, Faults, Starters 60 Minutes 6 Wiring Configurations 30 Minutes 7 Motor Replacements 30 Minutes 8 Field Trip 60 Minutes 9 Summary 30 Minutes Total Time: 450 Minutes 2 Elevator – Drive Motor Circuits Instructor’s Guide Overview Materials Purpose The purpose of this module is to: Mandatory Make sure you have the following Provide the participant with an overview of the circuits • PowerPoint Presentation that operate the drive motor system. • Coursebook • Quizzes • Pencils Objectives At the end of this lesson, the transit elevator/escalator trainee will be able to: Optional You may also want the following for optional • Identify the types of drive motors associated with each activities: type of elevator system. • Chalk board with chalk, large paper with • Describe the types of overload protection and their marker, etc. method of operation. • Internet connection • List and describe the different types of possible motor faults. • Lab, simulator or out of service elevator • List and describe the different types of starters. • Sample starters • Identify and trace the wiring configuration for a drive • Examples of various motors and drives motor using a schematic. • Describe the method used to change out a drive motor specific to the elevator. 3 Elevator – Drive Motor Circuits Instructor’s Guide Module Length: 450 min Time remaining: 450 min This section: 30 min (11 slides) Section start time: ________ Section End Time: ________ DO SAY Materials Needed In your own words: Welcome to the course on Elevator Electrical PPT slides 1, 2 REVIEW introduction slides Systems, Drive Motors. Advance Hopefully you will never encounter this, and this module is a step in the direction of knowing elevator drive motor systems and Instructor’s Notes how to avoid this situation. Advance 4 Elevator – Drive Motor Circuits Instructor’s Guide Module Length: 450 min Time remaining: 450 min This section: 30 min (11 slides) Section start time: ________ Section End Time: ________ DO SAY Materials Needed In your own words: PPT slide 3 REVIEW module objectives Today we will - Identify the types of drive motors associated with each type of elevator system. - Describe the types of overload protection and their method of operation. - List and describe the different types of Instructor’s Notes possible motor faults. - List and describe the different types of starters. - Identify and trace the wiring configuration for a drive motor using a schematic. - Describe the method used to change out a drive motor specific to the elevator. Advance 5 Elevator – Drive Motor Circuits Instructor’s Guide Module Length: 450 min Time remaining: 450 min This section: 30 min (11 slides) Section start time: ________ Section End Time: ________ DO SAY Materials Needed In your own words: PPT slide 4 REVIEW key terms Lets take a look at some of the key words we will be defining as move through this module: - AC variable-voltage/variable-frequency (VVVF) - DC silicon-controlled rectifier (SCR) - DC pulse-width modulation drives (PWM) - alternating-current (AC) Instructor’s Notes - bi-metallic Thermal Overload Relay - direct-current (DC) - drive motor - drive systems - line Side - load Side - motor overload protection Advance 6 Elevator – Drive Motor Circuits Instructor’s Guide Module Length: 450 min Time remaining: 450 min This section: 30 min (11 slides) Section start time: ________ Section End Time: ________ DO SAY Materials Needed In your own words: PPT slide 5 REVIEW key terms - overload Section - resistance Temperature Devices - running protection - short circuit protection - slip velocity - solid-state overload relays Advance Instructor’s Notes 7 Elevator – Drive Motor Circuits Instructor’s Guide Module Length: 450 min Time remaining: 450 min This section: 30 min (11 slides) Section start time: ________ Section End Time: ________ DO SAY Materials Needed In your own words: PPT slide 6 ASK participants Thinking back to previous elevator courses, or elevator technical experiences in general, SMALL GROUP ACTIVITY what do we know about elevator motor systems, drives, and their electrical components? WRITE [Allow participants to think for a Instructor’s Notes Optional: minute and perhaps discuss with a Chalkboard/chalk partner ideas as well as write down or Paper/marker any ideas. Discuss participant responses and if possible list them on a chalk board or similar.] Advance 8 Elevator – Drive Motor Circuits Instructor’s Guide Module Length: 450 min Time remaining: 450 min This section: 30 min (11 slides) Section start time: ________ Section End Time: ________ DO SAY Materials Needed In your own words: PPT slide 7 REVIEW slide You may recall from earlier courses this figure and the drive system in the elevator is the muscle. This system is comprised of the motor, drive and related controls that help to lift and lower the elevator car. In a hydraulic system there is also a pump and related mechanisms. Instructor’s Notes Advance 9 Elevator – Drive Motor Circuits Instructor’s Guide Module Length: 450 min Time remaining: 450 min This section: 30 min (11 slides) Section start time: ________ Section End Time: ________ DO SAY Materials Needed In your own words: PPT slide 8 REVIEW slide You may also recall this earlier diagram showing the elevator control circuits. The part of the system we will be focusing on in this module will be the lift system within the elevator unit. [Discuss diagram with participants. Electrical power is supplied to the Instructor’s Notes system: the control system, the lift system, the cab, and the hoistway. User commands are sent to the control system via the user interface. These commands are distributed to the lift system for operation, and feedback is sent back to the control system from the cab and hoistway and eventually back to the user to alert the use of the position and movement of the elevator.] Advance 10 Elevator – Drive Motor Circuits Instructor’s Guide Module Length: 450 min Time remaining: 450 min This section: 30 min (11 slides) Section start time: ________ Section End Time: ________ DO SAY Materials Needed In your own words: PPT slide 9 REVIEW slide Elevator drive systems are required to not only accelerate and decelerate at speeds which provide a smooth ride for the passengers but they must also meet the need of accurate positioning when stopping at each landing. Cost is also a consideration when choosing the type of elevator installation for a Instructor’s Notes facility. Modern techniques with solid-state drive technology have helped to somewhat reduce the costs of installation and long-term maintenance. Within transit systems there are two basic types of elevator drive systems: Advance hydraulic and Advance electric. [Ask: What are the differences between hydraulic and electric systems? Use the diagrams to assist participants with their responses.] Advance 11 Elevator – Drive Motor Circuits Instructor’s Guide Module Length: 450 min Time remaining: 450 min This section: 30 min (11 slides) Section start time: ________ Section End Time: ________ DO SAY Materials Needed In your own words: PPT slide 10 REVIEW slide In electric elevator systems, the elevator motor drive adjusts motor torque output to achieve desired acceleration, deceleration, and travel speed independent of car loading. The drive's efficiency is an important component of overall elevator efficiency. Outdated, inefficient drives that may be part of Instructor’s Notes existing elevator systems but are no longer on the market include alternating-current (AC) two-speed, AC variable-voltage, and direct- current (DC) motor-generator sets (Ward Leonard). Modern, efficient drives include AC variable-voltage/variable-frequency (VVVF), DC silicon-controlled rectifier, and DC pulse- width modulation drives (PWM). Advance 12 Elevator – Drive Motor Circuits Instructor’s Guide Module Length: 450 min Time remaining: 450 min This section: 30 min (11 slides) Section start time: ________ Section End Time: ________ DO SAY Materials Needed In your own words: PPT slide 11 REVIEW slide Hydraulic elevator drives incorporate a motor, pump, control valve system to move the elevator between levels. A hydraulic elevator’s rate of rise is determined by the specific installation but the same principles apply with regard to acceleration and deceleration. In this module, we will look at Instructor’s Notes the drive motor systems and their controls in the various electric traction and hydraulic installations. Advance 13 Elevator – Drive Motor Circuits Instructor’s Guide Module Length: 450 min Time remaining: 420 min This section: 60 min (17 slides) Section start time: ________ Section End Time: ________ DO SAY Materials Needed In your own words: REVIEW slide PPT slide 12 Lets start this module off by taking a look at the
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