General Purpose Split Phase
Characteristics:
The split phase motor is most widely used, for "medium starting" applications. The split phase motor has a start and run winding. Both windings are energized when the motor is started. When the motor reaches about 75% of its rated full load speed, the starting winding is disconnected from the circuit by an automatic switch.
Applications:
This motor is excellent for medium duty applications and where stops and starts are somewhat frequent. Popular applications of split phase motors include: fans, blowers, office machines and tools such as small saws or drill presses where the load is applied after the motor has obtained its operating speed. |
|
General Purpose Capacitor Start
Characteristics:
Because of its improved starting ability, the capacitor start motor is recommended for loads which are hard to start. The motor has a capacitor in series with a starting winding and provides more than double the starting torque with one third less starting current than the split phase motor.
Applications:
It has good efficiency and requires starting currents of approximately five times full load current. The capacitor and starting windings are disconnected from the circuit by an automatic switch when the motor reaches about 75% of its rated full load speed. Special applications include: compressors, pumps, machine tools, air conditioners, conveyors, blowers, fans and other hard to start applications. |
 |
General Purpose PSC
Characteristics:
The permanent split capacitor motor (PSC) is compact, easy to maintain, highly efficient and has a high power factor. These single-phase motors have a capacitor permanently connected in series with the starting winding. The starting winding and running winding are connected in parallel and are therefore in the circuit at all times.
Applications:
These motors do not use a switch and centrifugal governor and are characterized by low starting torque and smooth acceleration. A major advantage of the PSC motor is the capability of operation at different speeds. Special applications include: fans and blowers, air conditioners, coolers, furnaces, unit heaters, roof ventilators, dehumidifiers, garage door openers, floor care products, fans, compressors and other applications that require low starting torque and current. |
 |
Typical Polyphase Design
Characteristics
The three-phase motor has excellent starting torque characteristics yet the normal starting circuit requirements are low compared to single phase motors. Its high starting torque and running characteristics enable the motor to drive practically any equipment where load must be brought up from standstill to operating speed smoothly and quickly.
Applications
Popular applications include: grinders, lathes, drill presses, pumps, compressors, conveyors, also printing equipment, farm equipment, electronic cooling and other mechanical duty applications. |
 |
|
|
