| Permanent Split Capacitor (PSC) This design has an auxiliary winding with a "run" capacitor, but unlike the capacitor start / induction run motor, the capacitor and auxiliary winding remain in the circuit under running conditions. (There is no centrifugal switch on this type of motor). A permanent Split Capacitor motor has low starting torque and low starting current. PSC motors are generally used on direct-drive fans and blowers. They can also be designed for higher starting torque and intermittent applications, where rapid reversing is desired. A single phase general purpose design, with an electrolytic capacitor in series with the start winding, offering maximum starting torque per ampere. A centrifugal switch removes the auxiliary winding and capacitor when the motor approaches full load speed. The design is a heavy duty unit which has approximately 300% (of full load) starting torque. Common applications include compressors, pumps conveyors and other "hard-to-start" applications. |
H & H Industrial Sales and Service -Email- info@hhbearing.com -714-892-5008
| AC Electric Motors - Single Phase |
| Single phase Motors are standard motors up to 10 hp. Single-phase distribution is used when loads are mostly lighting and heating, with few large electric motors. A single-phase supply connected to an alternating current electric motor does not produce a revolving magnetic field; single-phase motors need additional circuits for starting, and such motors are uncommon above 10 or 20 kW in rating. Single-phase power distribution is widely used especially in rural areas, where the cost of a three-phase distribution network is high and motor loads are small and uncommon. In rural areas farmers who wish to use three-phase motors may install a phase converter if only a single-phase supply is available. Larger consumers such as large buildings, shopping centers, factories, office blocks, and multiple-unit apartment blocks will have three-phase service. In densely populated areas of cities, network power distribution is used with many customers and many supply transformers connected to provide hundreds or thousands of kV·A, a load concentrated over a few hundred square meters. Much of this information consists of standards defined by the National Electrical Manufacturers Association (NEMA). These standards are widely used throughout North America. In other parts of the world, the standards of the International Elector technical Commission (IEC) are most often used. |
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H & H Industrial Sales and Service -Email- info@hhbearing.com - 714-892-5008
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