ATMN 140 - Industrial Motors and Controls

4 Credit: (1 lecture, 3 open-lab, 0 clinical) 4 Contact Hours: [ATMN 110 ]

1. Explain necessary safety protocols using lockout, tag out procedures.
2. Identify proper safety equipment. (Fuse pullers, meter probes, Pad locks).
3. Demonstrate proper safety procedures in wiring low voltage control and power circuits.

Goal 2:  Interpret analog relay ladder logic diagrams.

1. Describe proper color codes for indicating wire usage.
2. Describe proper labeling of wiring harnesses.
3. Differentiate types of switches, normally open, normally closed, and automatic switches.
4. Demonstrate proper wiring techniques (one load per rung, etc.).

Goal 3:  Interpret wiring diagrams.

1. Construct a correctly wired circuit from a wiring diagram.
2. Distinguish between control and power circuits.
3. Demonstrate a low voltage (110v) motor control circuit.

Goal 4:  Create electrical connections between motors and controls.

1. Use switches and relays to construct a three-wire motor control circuit.
2. Design a motor control circuit to reverse a three-phase motor using a drum switch.
3. Demonstrate proper use of heaters for motor overload protection.
4. Rewire three-phase for motor for low or high voltage operation.

Goal 5:  Troubleshoot motor circuits using electrical test instruments.

1. Demonstrate proper procedure for determining blown fuses and other safety devices.
2. Interpret motor characteristics such as RPM, torque, horsepower, and electrical requirements.
3. Demonstrate proper procedure for identifying a failed motor and determining an appropriate replacement.
4. Troubleshoot/correct low voltage motor control circuits.
5. Demonstrate the proper use of a voltmeter.
6. Demonstrate the proper use of ammeters and amp clamps.

Goal 6:  Demonstrate proper use of automatic input devices in relay ladder logic controls.

1. Create circuits to use various input devices including: Limit, pressure, float switches, etc.
2. Demonstrate proper procedure for connecting H.O.A. (Hand-off-Automatic) control logic.
3. Create a sequence control logic circuit.
4. Implement student designed sequence Control Circuit.

Goal 7:  Build timer controlled circuits using relay ladder logic.

1. Operate student assembled on-delay/off-delay relay ladder logic circuits.
2. Create a motor control circuit to perform time driven circuitry.
3. Create a motor control circuit to perform an unloaded start of a motor.

Goal 8:  Implement proper use of basic electrical sensors used in relay ladder logic controls.

1. Analyze the characteristics of capacitive vs inductive proximity switch performance.
2. Operate a relay ladder logic control circuit using an inductive proximity switch.
3. Operate a relay ladder logic control circuit using a capacitive proximity switch.
4. Operate a motor control circuit with a photo electric sensor.
5. Create a motor control circuit that will sense a product jam on a conveyor control system.

Goal 9:  Explore the operation of variable frequency three phase motor drive (VFD).

1. Operate a three-phase motor using the front keypad of a VFD.
2. Operate a VFD for three wire configuration.
3. Operate a VFD for two wire configuration.
4. Operate a VFD to jog a motor.

Goal 10:  Explore the operation of variable frequency drive for speed and torque control.

1. Control the speed of a three-phase motor using a VFD. 
2. Program a VFD to skip undesirable frequencies.
3. Program a VFD to operate a motor above and below its data plate listed RPM.
4. Calculate volts per hertz ratio.
5. Program a VFD to provide a motor with low speed boost.

Goal 11:  Explore the operation of variable frequency drive for Acceleration Deceleration and Braking.

1. Program a VFD to ramp a motor up to its rated speed.
2. Program a VFD to ramp a motor down from its rated speed to a stop.
3. Program a VFD to provide S curve acceleration to an induction motor.
4. Program a VFD to provide DC injection braking.

Goal 12:  Create PLC and VFD electrical control wiring.

1. Install a PLC and a VFD into an electrical enclosure.
2. Correctly assemble power, control, and I/O wiring circuits in an electrical enclosure.
3. Correctly assemble a forward/reverse motor control system that uses PLC discrete I/O.
4. Correctly assemble a motor control system using VFD/PLC discrete I/O and interlocked motor control.