Att Et Week 9 Mr.j Class

Front 1

A/D Converter

Back 1

Converts analog to digital

Front 2

Quantization

Back 2

A process which divides an analog input range into equally-divided segments

Front 3

Stairstep A/D Converter uses:

Back 3

Up counter / D/A Converter / Comparator

Front 4

An analog sine wave input produces a:

Back 4

Stepped Digital Output

Front 5

Tracking A/D Converter uses:

Back 5

Up/Down Counter / D/A Converter / Comparator

Front 6

Tracking A/D Converter:

Back 6

Continuously tracks an analog with each clock pulse

Front 7

Multiplexing:

Back 7

The process of putting information from several sources onto a single line or transmission path

Front 8

D/A Conversion:

Back 8

Generates voltage to represent the binary column values

Front 9

What are the Two methods for D/A conversion:

Back 9

1. Weighted

2. Scaled

Front 10

Scaling Resistors:

Back 10

Divide the input into fractional values

Front 11

Resolution voltage

Back 11

The smallest increment of voltage that can be expressed

Front 12

What type of scaling does the R/2A D/A Convert us:

Back 12

Scaling

Front 13

Data Selector Circuits have how many inputs/outputs:

Back 13

Seven Inputs / One output

Front 14

Not En enables inputs A Through D. A _______ Signal is required for selection:

Back 14

Low

Front 15

Demultiplexer:

Back 15

Accepts data one bit at a time, or in groups from a single input line.

Front 16

Rotating Machine:

Back 16

Any device that has a spinning, or rotating, shaft and uses electricity as the input or output.

Front 17

Motor:

Back 17

Device that uses an electrical input and converts it to a mechanical output.

Front 18

Generator:

Back 18

Device that uses a mechanical input and converts it to an electrical output.

Front 19

Incremental Motor:

Back 19

Electrical Input causes the shaft to rotate a specific distance in degrees

Front 20

Incremental motor, or Stepper Motor, uses ________ pulses to position the shaft.

Back 20

Digital

Front 21

Analog Motor, or synchronous motor, uses ________ to position the shaft.

Back 21

A specific magnitude of voltage

Front 22

Continuous motor:

Back 22

Rotates smoothly without interruptions when the input is applied.

Front 23

Dynamo:

Back 23

Produces a DC voltage output.

Front 24

Motors and Generators both operate off the principle of:

Back 24

Electromagnetism.

Front 25

Speed:

Back 25

How fast the shaft rotates.

Front 26

Speed is measured in:

Back 26

RPM

Front 27

RPM is determined by:

Back 27

The Applied Voltage

Front 28

Torque:

Back 28

Twisting force that causes the shaft of the motor or generator to rotate.

Front 29

Torque is ______________ To RPM

Back 29

Inversely Proportional.

Front 30

As RPM Increases, CEMF _________.

Back 30

Increases.

Front 31

Power:

Back 31

Amount of work that is accomplished.

Front 32

Efficiency:

Back 32

How well the motor is able to change electrical power into mechanical power.

Front 33

The amount of CEMF generated is dictated by:

Back 33

How fast the conductor rotates in the magnetic field.

Front 34

When the conductor does not rotate, it is called:

Back 34

A locked shaft or locked Rotor Condition.

Front 35

Motors take ______ Energy and convert it to ______ Energy.

Back 35

Electrical energy to Mechanical Energy.

Front 36

The rotor is connected to the:

Back 36

Output shaft

Front 37

DC motors operate on the principle of

Back 37

Attraction and repulsion.

Front 38

DC generators operate on the principle:

Back 38

When a conductor passes through a magnetic field, current or vooltage is produced.

Front 39

What type of data circuit chooses one of several outputs for one input:

Back 39

Distributor

Front 40

What type of D/A converter uses different values of resistors:

Back 40

Binary Weighted

Front 41

What type of power is produced by a generator:

Back 41

AC or DC

Front 42

CEMF and Speed are:

Back 42

Proportional

Front 43

What principle of magnetism allows a generator to power its own stator winding and still generate an output voltage:

Back 43

Retentivity

Front 44

A/D Converter:

Back 44

Converts Analog to Digital

Front 45

Divide the input into fractional values:

Back 45

Scaling Resistor

Front 46

The smallest increments of voltage that can be expressed:

Back 46

Resolution Voltage

Front 47

Three Basic Types of DC Motors:

Back 47

1. Shunt

2. Series

3. Compound

Front 48

What are the two basic configurations of a compound motor?:

Back 48

Long shunt, Short shunt.

Front 49

Shunt Field Coil in Parallel with series field coil and armature:

Back 49

Long Shunt

Front 50

Shunt field coil in parallel with the armature only:

Back 50

Short Shunt

Front 51

Shunt motor used when:

Back 51

High speed and constant torque are required.

Front 52

________ and ________ must occur before a motor supplies mechanical power.

Back 52

Speed and Shaft Rotation

Front 53

Varying applied voltage is called:

Back 53

Armature Control

Front 54

What type of filed coil is used in a DC Series field motor:

Back 54

Low Resistance

Front 55

Starting current in a motor is always:

Back 55

Greater than running current.

Front 56

Series Motor Start/Run:

Back 56

Start: High Torque

Run: Low Torque

Front 57

Shunt Motor Start/Run:

Back 57

Start: Low Torque

Run: High Torque

Front 58

What are the two types of DC motor speed controls:

Back 58

Amplitude control / Time Control

Front 59

The Time that the voltage is off is called:

Back 59

The Fire Angle

Front 60

The time that the voltage is on is called:

Back 60

The conductive angle

Front 61

Time between two Clock pulses:

Back 61

Pulse Repetition Time

Front 62

What are the two principles factors of Motion:

Back 62

1. Distance

2. Time

Front 63

An increase in velocity is called:

Back 63

Acceleration

Front 64

Constant velocity produces:

Back 64

Linear motion

Front 65

Most popular motion sensors used:

Back 65

1. Photo Interrupter

2. Photo Reflector

3. Magnetic Pickup

Front 66

Motion Sensor correlates a change in ______ to a _______.

Back 66

Velocity to a Frequence

Front 67

The velocity of a point on ta rotating disk is not affected by the:

Back 67

Number of sensor marks on the disk

Front 68

A motion detector circuit will not sense which of the following parameters:

Back 68

Position

Front 69

The distance traveled from a point on the circumference of the circular object in a given time period:

Back 69

Runout

Front 70

How many types of compound motors are there:

Back 70

2

Front 71

A series field motor schematic has the shunt filed coil place in parallel with:

Back 71

There is no shunt field coil in a series field motor.

Front 72

Which type of compound motor is common in small dc motors:

Back 72

Short shunt

Front 73

Opposing the series and shunt fields causes a DC compound motor to:

Back 73

Lose armature magnetic field.

Front 74

The amplitude of the DC Input:

Back 74

Determines the width of the pulse width modulated signal.

Front 75

As a load is increased on a motor:

Back 75

Current Increases

Front 76

Ration between frequency and output voltage:

Back 76

Conversion Factor.

Front 77

Series motors are ideal for applications that require:

Back 77

Large Starting Torque

Front 78

The heart of any speed regulator circuit is the:

Back 78

Controller

Front 79

The location of an object:

Back 79

Position

Front 80

Devices that cause a change in position:

Back 80

Generators

Front 81

Analog position generators include:

Back 81

1. DC servos

2. AC servos

3. Syncro

4. Transmitters

Front 82

Detect a change in position

Back 82

Sensors

Front 83

Analog Position Sensors:

Back 83

1. Resolver

2. Synchro Receivers

3. Variable Transducers

Front 84

Digital position sensors are:

Back 84

Encoders

Front 85

Position Generators:

Back 85

Use electrical input, produce a mechanical output.

Front 86

Position Sensors:

Back 86

Mechanical input to produce an electrical output.

Front 87

Position generators and sensors normally use:

Back 87

Feedback

Front 88

Rate at which a motor shaft turns:

Back 88

Rotational Speed

Front 89

Digital Steppers:

Back 89

Generators

Front 90

Digital Encoders:

Back 90

Sensors

Front 91

Devices that change a mechanical position to an analog electrical signal:

Back 91

Analog position sensors

Front 92

A transformer with a movable primary coil and a fixed secondary coil:

Back 92

Induction Resolver

Front 93

Which device best describes an analog resistance position sensor:

Back 93

Transformer

Front 94

Which device best describes an analog resistance position sensor:

Back 94

Potentiometer

Front 95

The optimum performance reference setting provided by the system operator:

Back 95

Set Point

Front 96

The actual measured performance provided by sensors in the control circuity:

Back 96

Process variable

Front 97

Senses an error between the set point and the process variable signal:

Back 97

Proportional Control

Front 98

A region extending on both sides of the set point where the process variable is being controlled:

Back 98

Proportional Band

Front 99

Puts the set point back to its original Position:

Back 99

Integral Control Mode

Front 100

An action that enables the stabilization of a controlled process:

Back 100

Derivative Control

Front 101

Reduces the overshoot but does not aid in reaching the set point value:

Back 101

PD Control

Front 102

Allows the set point value to be reached, but the rise time is degraded:

Back 102

PI Control

Front 103

Applying a signal throughout a circuit:

Back 103

Signal Injection

Front 104

DC motor controls include:

Back 104

1. Time Control - Pulse Width Modulation

2. Amplitude Control

Front 105

4 Basic components of a Brushless DC motor:

Back 105

1. Rotor

2. Stator

3. Commutation Electronics

4. Rotor Position Sensors

Front 106

If angular acceleration increases while rotational inertia remains constant:

Back 106

Torque Increases

Front 107

If angular acceleration increases, and torque remains constant:

Back 107

Rotational Inertia Decreases

Front 108

If torque goes up:

Back 108

Inertia goes down.

Front 109

Basic Electronic sub-systems consist of:

Back 109

Sensors, motor drive circuit, interface circuit and microprocessor

Front 110

Hall-effect sensor detects:

Back 110

Magnetic fields in the immediate area.

Front 111

AC rotors are also refereed to as:

Back 111

Squirrel Cage Rotors

Front 112

How fast the stator magnetic field rotates is known as:

Back 112

The field speed or field RPM

Front 113

Difference between synchronous speed and shaft speed:

Back 113

Slip Speed.

Front 114

Synchronous speed:

Back 114

Stator field speed / Field RPM

Front 115

What factor plays an important part of scheduling ac motor maintenance:

Back 115

Environment

Front 116

Troubleshooting process of AC Motors:

Back 116

1. Visual Inspection

2. Operational check

3. Performance

Front 117

What must you do before working on electrical equipment every time:

Back 117

De-energize and lock-out tag-out the equipment.

Front 118

If the input voltages are missing, low, or incorrect, the problem is:

Back 118

With the motor controller, fuses, or circuit breakers.

Front 119

If vibrations is noticed:

Back 119

Check the load for intermittent binding.

Front 120

Rotary electro-mechanical position-sensing device:

Back 120

Synchros

Front 121

Synchros transmit information in the form of:

Back 121

Voltage

Front 122

The two components of a synchro:

Back 122

1. Stator

2. Rotar

Front 123

What two types of Synchro are there:

Back 123

1. Torque Synchro

2. Control Synchro

Front 124

Torque synchro used for what type of load:

Back 124

Light Load

Front 125

Control synchro used for what type of load:

Back 125

Heavy Load

Front 126

A synchro used as a transmitter or control transformer:

Back 126

Transolver

Front 127

Purpose of a Synchro is to:

Back 127

Transfer angular information in the form of voltage.

Front 128

Mechanical device containing a spinning mass that is universally mounted:

Back 128

Gyroscope

Front 129

The axis of rotation (spin axis) of the gyro wheel tends to remain in a fixed directional in space if no force is applied to it:

Back 129

Rigidity

Front 130

The axis of rotation has a tendency to turn at a right angle ( 90 degrees) to the angle of the applied force:

Back 130

Procession

Front 131

Ability of a gyro to keep its axis fixed in space:

Back 131

Rigidity

Front 132

Universally mounted gyro:

Back 132

Free Gyro

Front 133

Strength which a gyro resists any external force that would tilts its rotor spin axis:

Back 133

Gyro Rigidity

Front 134

Three Factors that Determine Gyro Rigidity:

Back 134

1. Weight of rotor

2. Distribution of this weight

3. Rotor speed or rpm

Front 135

A function of rotor weight and rotation:

Back 135

Angular Momentum

Front 136

Establishes vertical and horizontal reference point:

Back 136

Gyro Perpendicular

Front 137

Plane of the North/South Meridian:

Back 137

Gyro Parallel

Front 138

Used to detect and measure angular rates of change:

Back 138

Rate Gyros

Front 139

Primarily used for measuring angular rates:

Back 139

Rate Gyros

Front 140

Provides an indication in the form of a voltage that is proportional to the acceleration to which it is subjected:

Back 140

Accelerometer

Front 141

Primary data source of the INS:

Back 141

Accelerometer

Front 142

What stabilized platform is mostly mechanical and is susceptible to errors:

Back 142

Gimbalized INS

Front 143

Why is the BLDC easier to examine and repair then a conventional DC motor:

Back 143

The electrical winding's do not rotate

Front 144

What is the basic purpose of a photodiode array of an optical sensor:

Back 144

Convert light into data

Front 145

What is the relationship of torque to acceleration:

Back 145

Directly Proportional

Front 146

Which type of Ac motor is used for large horsepower or special applications:

Back 146

Synchronous.

Front 147

What troubleshooting stage allows the technician to locate the most difficult and hidden problems of the motor:

Back 147

Performance Test

Front 148

The torque differential transmitter always adjust a synchro system according to the

Back 148

current compass heading

Front 149

When synchronized, what is the output form the control transformer:

Back 149

Null

Front 150

For troubleshooting a synchro system ,a multi meter is used to measure:

Back 150

Resistance

Front 151

Which is the symptom of a shorted receiver stator winding's:

Back 151

The receiver rotor locks up on the good winding's

Front 152

How are components isolated for troubleshooting in a synchro system:

Back 152

Flip switches, disconnected cables.

Front 153

What do you do during a visual Inspection:

Back 153

Check the cord

Front 154

What stage do you check for proper operations:

Back 154

Operational check / Stage 2

Front 155

What is air gap?:

Back 155

The barrings ware

Front 156

Ac motors can be:

Back 156

1, 2, or 3 phase

Front 157

When is Torque Maximum:

Back 157

Lock-Rotor

Front 158

An AC motor Requires:

Back 158

AC Current / Sine Wave

Front 159

How many turns does an ac induction motor have:

Back 159

None

Front 160

What is undesirably controlled in a DC motor:

Back 160

Large current

Front 161

What kind of controller uses transistors:

Back 161

Solid State

Front 162

Where is the human operators input:

Back 162

Visual

Front 163

What are two type of controllers:

Back 163

1. Time - Pulse Width Modulation

2. Amplitude Control

Front 164

Firing Angel Effects:

Back 164

Applied Voltage, Conducting Angle, Amplitude

Front 165

Position Generator is also known as:

Back 165

Prime Mover

Front 166

Analog Position Sensor:

Back 166

Resolver

Front 167

CEMF Apposes

Back 167

Armature voltage

Front 168

What is not apart of a brushless DC motor:

Back 168

Armature

Front 169

A rotor in a BLDC is similar to a:

Back 169

Conventional DC stator

Front 170

Why is a BLDC easier to fix:

Back 170

Because it inst rotating

Front 171

What is the advantage of BLDC:

Back 171

Higher Torque

Front 172

What is the disadvantage of BLDC:

Back 172

Higher Cost

Front 173

What are the two types of BLDC:

Back 173

1. Industrial

2. Miniature

Front 174

What is the purpose of a photodiode Array:

Back 174

Turns Light into Data

Front 175

What are the benefits of Hall-Effect Photodiode:

Back 175

1. Lower cost

2. Reliable

3. Less components

Front 176

What part of the motors allows you to reverse the magnetic poles:

Back 176

Commutators / Brushes

Front 177

Two Basic Components of a motor are:

Back 177

1. Armature

2. Pole

Front 178

Voltage at the output with no load:

Back 178

Offset voltage

Front 179

Sensors commonly used in a closed loop feedback circuit:

Back 179

1. Electrical Transducer

2. Photodiode