All three-phase units are high-starting-torque motors and are capable of restarting against a load. Compared to single-phase motors, it’s unusual for a three-phase motor to be in a locked-rotor ...

Whether you use a single-phase AC motor or DC brushless motor is more DICTATED BY WHAT POWER IS READILY AVAILABLE. If AC “high-voltage” line is only available (such as in portable heater), AC motor is ...

Industry generally runs on three-phase AC systems, mainly because three-phase electric motors are so much more efficient and compact than the equivalent single-phase motor.

On a motor older than 10 yr or less than 1 hp, however, the motor is usually replaced. Since the cost of repair often exceeds the cost of a new one, small motors less than 1 / 8 hp are also typically ...

Single-phase motors use a one-phase wire and a neutral wire—this is most common for smaller motors. Three-phase motors use three different phases in the electrical systems, which are all 120 degrees ...

Table 430.248 single-phase motors; Table 430.250 3-phase motors; However, for some specific types of motors, the actual nameplate full-load amperes ... If for a single motor, size conductors at least ...

Power Integrations’ new software adds three-phase FOC to the existing library of single-phase code. It allows real-time adjustment of motor speed and torque via the Motor-Expert graphical user ...

Many single-phase compressors require a start capacitor to assist in starting the motor. These capacitors will occasionally fail, causing a compressor to fail to start. Overheating is a primary cause ...

A three-phase motor may have just three coils or 33, it depends on what the motor designer wants. Six to nine coils are pretty typical for automotive radial flux. Koenigsegg ...