Chapter 11: Rotary Terminal Single-Phase Induction Motor
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Source Metadata
Section titled “Source Metadata”| Field | Value |
|---|---|
| Source | Theory and Calculation of Electric Apparatus |
| Year | 1917 |
| Section ID | theory-calculation-electric-apparatus-chapter-10 |
| Location | lines 14762-14896 |
| Status | candidate |
| Word Count | 892 |
| Equation Candidates In Section | 0 |
| Figure Candidates In Section | 0 |
| Quote Candidates In Section | 0 |
Opening Source Excerpt
Section titled “Opening Source Excerpt”CHAPTER XI ROTARY TERMINAL SINGLE-PHASE INDUCTION MOTOR 101. A single-phase induction motor, giving full torque at starting and at any intermediate speed, by means of leading the supply current into the primary motor winding through brushes moving on a segmental commutator connected to the primary Diagram of rotary terminal aingle-plia-w induction motor. winding, was devised and built by II. Eickemeyer in 1891, and further work thereon done later in Germany, but never was brought into commercial use. Let, in Fig. 60, P denote the primary stator winding of a single- phase induction motor, S the revolving squirrel -cage secondary winding. The primary winding is arranged as a ring (or drum) Winding and connected to a stationary commutator, C. The single-phase supply current is led into the primary winding, P, through two brushes bearing on theSource-Located Theme Snippets
Section titled “Source-Located Theme Snippets”Ether references
Section titled “Ether references”... clockwise rotation. As So carries Pi, with increasing speed of So and P,t Bj and with il I lie brushes, B„, slow down, until full speed of the power motor, So, is reached, the brushes. BB, stand still, anil the brushes, Bu by their friction on the commutator, <",, revolve together with f„ /*, and 8+ In whichever direction the brushes, B,. are Btarted, in the same direction starts Ihe main motor, So. SINGLE-PHASE INDUCTION MOTOR 175 If by overload the main motor, So, drops out of step and slows down, the slowing down of Pi starts Si, and with it ...Radiation / light
Section titled “Radiation / light”... s, B, are rotated at oversynchronous speed: /i>/, the motor torque is reversed, and the rotor turns in the same direction as the brushes. In general, it is: /i+/2 + s=/, where /i = brush speed, /2 = motor speed, s = slip required to give the desired torque, / = supply frequency. 102. An application of this type of motor for starting larger motors under power, by means of a small auxiliary motor, is shown diagrammatically, in section, in Fig. 61. Po is the stationary primary or stator, So the revolving squirrel- cage secondary of the power motor. ...Chapter-Local Concept Hits
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