Three-Phase Motors PowerPoint Presentation for ER 2030 Three-Phase

Three-Phase Motors PowerPoint Presentation for ER 2030 Three-Phase

Three-Phase Motors PowerPoint Presentation for ER 2030 Three-Phase Motors Rotating Magnetic Field The principle of operation for all three-phase motors is the rotating magnetic field. The magnetic field rotation is caused by:

voltages are 120 out of phase. voltages periodically change polarity. the arrangement of the stator windings. Three-Phase Motors

Three-phase stator and three voltage sine waves. Three-Phase Motors The magnetic field is concentrated between poles 1A and 1B.

Three-Phase Motors The magnetic field is concentrated between poles of phases 1 and 2. Three-Phase Motors

The magnetic field is concentrated between poles 2A and 2B. Three-Phase Motors The magnetic field is concentrated between phases 2 and 3.

Three-Phase Motors The magnetic field is concentrated between poles 3A and 3B. Three-Phase Motors The magnetic field is concentrated between

phases 1 and 3. AC Motors Animation http:// www.physclips.unsw.edu.au/jw/ele ctricmotors.html#DCmotors

Three-Phase Motors Synchronous Speed Synchronous speed is the rotational speed of the magnetic field. Synchronous speed is determined by: the number of stator poles per

phase. the frequency of the applied voltage. Three-Phase Motors RPM STATOR POLES

3600 2 1800 4

1200 6 900 8

Three-Phase Motors Synchronous Speed

S = (120 x F) / P S = synchronous speed in RPM F = frequency in Hz P = number of stator poles Three Phase Motors Torque Three factors determine the amount

of motor torque: the strength of the stator magnetic fields. the strength of the rotor magnetic fields. the phase angle difference between the rotor and stator fields.

Three-Phase Motors

Phase Rotation The direction of rotation is either clockwise or counterclockwise. Reversing any two of the stator leads will reverse the direction of rotation. A phase rotation meter can determine the direction of rotation.

Motor stator leads are often called T leads. Three Phase motors Slip An induction motor never reaches

synchronous speed. Slip is the difference between synchronous speed and rotor speed. Percent slip is the ratio of slip to synchronous speed times 100. Three-Phase Motors

Connecting the phase rotation meter to the motor. Three-Phase Motors Connecting the phase rotation meter to the line.

Three-Phase Motors Standard numbering for three-phase motors. Three-Phase Motors For more information on stator windings,

watch these videos: Three Phase Motors Video 01 Three Phase Motors Video 02 Three-Phase Motors Standard high-voltage wye connections.

Three-Phase Motors Standard high-voltage delta connections. Three-Phase Motors Standard low-voltage wye schematic.

Three-Phase Motors Standard low-voltage wye chart and diagram. Three-Phase Motors Standard low-voltage delta schematic.

Three-Phase Motors Standard low-voltage delta chart and diagram. Three-Phase Motors 12-Lead Dual-Voltage Motors Some motors will have 12 T leads

brought to the terminal box instead of the usual 9 leads. These motors are intended for wyedelta starting. Wye-delta starting helps limit inrush starting current. Three-Phase Motors

Standard 12-lead motor schematic.

Recently Viewed Presentations

  • TABLE 5: TOP 20 AUTHORITARIAN REGIMES, 2004 China

    TABLE 5: TOP 20 AUTHORITARIAN REGIMES, 2004 China

    * * Notes. Simplified. Easy Viewing. Elec College. Projections2 . Incumbents. OECD Comparison. OECD Comparison (2) Table 7 Incumbents. Dictatorships Table 5. Table 4 Global Elections
  • Equal Opportunity & Diversity Programs (EODP) Staff

    Equal Opportunity & Diversity Programs (EODP) Staff

    George Roberts, born 1908, Oldest and Longest-serving Federal Employee Emma Tillman, born 1892, died @ 114 yrs old January 28, 2007 Madame Jeanne Louise Calment, born 1875 (died @ 122 years, 164 days old August 4, 1997) THE AGING WORKFORCE...
  • FLEXBONE OFFENSE PRESENTED BY Jason Compton WHY THE

    FLEXBONE OFFENSE PRESENTED BY Jason Compton WHY THE

    WHY THE FLEXBONE? Flexible. Angle Blocking. Numbers. Big Play Opportunities. Defensive Nightmare. Defensive Preparation. Fun
  • Demeter and Persephone

    Demeter and Persephone

    Demeter loved how much she was worshipped by humans Demeter was Cronus' daughter and Zeus' wife Demeter gave birth to Persephone, the joy of her eternal lifetime and the daughter of Zeus Persephone loved spending time in fields in Sicily,...
  • Our 50 States: [Name of Your State]

    Our 50 States: [Name of Your State]

    RPDP Secondary Literacy Have you ever gotten to the end of a page and had no idea what you'd just read? RPDP Secondary Literacy The reason this happens is because you probably missed the main idea. sportsillustrated.com RPDP Secondary Literacy...
  • The Political System in Germany

    The Political System in Germany

    Head of state: president of Germany. His role is more ceremonial. by his actions and public appearances, represents the state itself, its existence, its legitimacy, and unity. involves an integrative role and the control function of upholding the law and...
  • Diapositive 1 - leslucs-notredame.fr

    Diapositive 1 - leslucs-notredame.fr

    Mettre les pommes dans le fond du moule. Mesurer la quantité de farine. Ajouter le sucre…
  • What Is Financial Aid?  Financial aid consists of

    What Is Financial Aid? Financial aid consists of

    Alien registration or permanent resident card (if not a U.S. citizen) The FAFSA - 2019-2020Important Things to Keep In Mind: ... Online help available on the form. Federal Programs. Pell Grant (2018-19 max award $6,095)* ... Marla Kane. Higher Education...