B481

OTHER: - Electrical - Definitions, Acronyms & Algorithms

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Definitions & Algorithms

Definitions & Algorithms

Definitions & Algorithms

Definitions & Algorithms

Definitions & Algorithms

Definitions & Algorithms

Symbols

Symbols

Symbols

See binder Permanent Magnet Motor Technology

 

Symbols

Note: The algorithms are in blue

Ref. Symbols are in Times New Roman 2 sizes up from smallest. Subscripts are increased one size. See: Access database for procedures running the algorithms and for additional information.

Ampere: (A)

Anisotropic Material:

Armature:

Axial Flux Machine: (Disk Type Machine)

Armature Reaction Effect:

Back EMF:

Bipolar Switching: [Motor control]

Brushless DC motor (BLDC):

Brushless Motor Types:

Capacitance:(C) [farads]

Carter Coefficient: (kC)

Circuit Schematic Symbols:

Closed Loop Speed Controller: (Feedback Speed Controller)
Coercivity:

Cogging Torque:

Coil:

Coil Pitch:

Conductivity:

Core:

Coreless Trapezoidal Stator:

Coulombs: (C) is the SI unit of electric charge

Damper:

Delta Connection:

Diameter Ratio (λ):

Dielectric:

Direct Axis: (D-axis)

Drum Type Winding: (Toroidal)

DSP board:

Eddy Current: (Foucault current)

Electrical Angle:

Electromagnetic Induction:

Electromagnetic Force: Lorentz force

Electromotive Force [EMF];

Electronic Power Converter [EPC]:

Electrotor:

End Windings:

Energy: (W) [Joules], One watt is one Joule of energy transferred or dissipated in one second

Energy Density: (by volume ~ Wh/l (by mass ~ Wh/kg)

Farad: (F) the SI unit of capacitance

Ferromagnetic:

Ferromagnetism:

Field Effect Transistor (FET):

Field-Weakening:

Flux: (Φ)

Flux Barrier:

Flux Vector:

Freewheeling Diode (Flyback Diode)(Snubber Diode)(Suppressor Diode)(Catch Diode):

Gramme-type Winding:

Halbach Magnet Array:

Hall Effect Sensor:

Harmonic Distortion:
Harmonic Fields:

Hysteresis: [H] [magnet]

Impedance:

Inductance: (H) Henry the SI unit of inductance

Insulated-gate bipolar transistor (IGBT)

Inverter:

Ironless Core:

Joule: (J)

Henry: (H)

Hertz: (Hz)

Laminated Core:

Lap Winding:

Left Hand Rule:

Magnet:

Magnet Bandage:

Magnetic Arc:

Magnetic Field Intensity: [H]

Magnetic Flux Density: [B]

Magnet Leakage Flux:

Magnetic Pitch:

Magnetic Skew:

Magnetic Slot Wedges:

Magnetic Span:

Magnetomotive Force [MMF]:

Microcontroller:

Metal Oxide Semiconductor Field-Effect Transistor (MOSFET)

Motor Constants:

Mutual Induction;

Ohm: (Ω)

Outrunner Configuration:

Permanent Magnet DC motor (PMDC):

Permeability: [magnet]

Poles:

Pole Pairs: (p)

Pole Pitch:

Polygon Connection:

Power: (P)

Power Density:
  • Motor ~ The output power per mass or volume.
  • The amount of power available from a battery. It is expressed as the power available per unit volume or per unit weight (W/L or W/kg).

Power Factor:

Power ~ Real, Reactive, and Apparent:

Pulse Width Modulation: [PWM]

Pulse Frequency Modulation: [PFM]
Quadrature:

Quadrature Axis: (Q-axis)

Radial Flux Machine:

Reluctance:

Remeance:

Resistance: (R, Ω)

Resistivity: (ρ) rho

Resistor:
  • A resistor is a two-terminal electronic component that produces a voltage across its terminals that is proportional to the electric current passing through it in accordance with Ohm's law.
RPM Constant: (KV):

Rotor Spider:

  • A set of radial arms that support the rotor core on the shaft. The use of a rotor spider also aids rotor cooling.

Rotor Yoke:

  • Xx

Salient Pole: (electromagnetism)

  • A structure of magnetic material on which is mounted a field coil of a generator, motor, or similar device.

Self Induction:

  • Self-induction occurs because the changing magnetic field in a circuit induces an electromotive force in itself.
  • See also; Mutual Induction;
Semens: (S)
  • Electrical conductance.
Servo Motor;

Sinewave:

Sinusoidal EMF Waveform:

  • xx

Skin Effect:

  • Skin effect is a term used when the electrons flowing through a copper wire tend to travel only in the outer circumference of the wire. The centre of the wire is then just unwanted weight.

Slot Pitch:

Slotless Winding:

Slots:

  • xx

Soft Magnetic Composites:

  • A magnetic material which is relatively easily magnetized or demagnetized.
  • Shape capability and unique magnetic properties make components produced from SMC's good alternatives to lamination stack technology.

Speed - Frequency Relationship:

Spider:
  • xx

Squarewave:

  • Squarewave machine (trapezoidal machines)

Star Connection:

Stator:

Stator Tooth:

  • The laminate etc. about which the coil is wound?.

Stator Yoke:

Synchronous Motor:

Tape Wound / Strip Wound:

  • Core of the stator.
Telsa: (T)
  • Magnetic flux density.

Thyristor:

Toroidal Winding: (Drum Type Winding)

Torus Motor:

  • The windings have the shapes of doughnuts and the laminate core does not have/require notches.

Transverse Flux Machine:

Trapezoidal EMF Waveform:

  • xx

Turns:

  • The number of winds on the armature.

Unipolar Switching: [Motor control]

  • A drive that is capable of driving phase current in only one direction.

Variable Frequency Drive:

Volt: (V)

  • Electrical potential.

Watt: (W)

  • The unit for measuring power. In physics terms, one watt is one Joule of energy transferred or dissipated in one second. Electrical power is calculated as: Watts = Volts x Amps x Power Factor.
Weber: (Wb)
  • Magnetic flux.

Wye Configuration, Star Connection (y):

Winding Configuration:

Wire:

Outside Web Sites:

General Answers: http://www.answers.com/

Glossary of Motor Terms: http://www.empiremagnetics.com/glossary/glossary.htm

Glossary of Motor Terms ~ Rockwell Automation: http://www.reliance.com/prodserv/motgen/b9652new/b9652.htm

Glossary related to motors: http://powertecmotors.com/F2got.html

Glossary of Electrical Engineering Terms: http://www.maxim-ic.com/glossary/

Glossary for the encoder (and drives) world;- http://www.gke.org/rapporter/Glossary%20for%20the%20encoder%20world.pdf

Electric Motor Definitions and Terminology;- http://www.engineersedge.com/motors/motors_definitions.htm

Online Text book on Electric Circuits; http://pergatory.mit.edu/2.007/Resources/databooks/lessons_pdf/AC.pdf#search=%22%22winding%20connection%22%20%224-phase%22%20-%22stepper%20motor%22%20-%22step%20motor%22%22

http://www.engineersedge.com/motors/motors_definitions.htm

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Last Revised; February 8, 2010