Yaskawa AC Servo Motor 100W, 200V, 0.89A, 3000 RPM, Motoman SGMPH-01A1A-YR11

 

 

 

 

The common power source in the United States is alternating current, 60 hertz. The power supply may be either single phase or three phase. Generally speaking, single phase is used on electric motors that are less than 1 horsepower. Motors 1 horsepower and larger
should be supplied with three phase power if it is available.

 

Generally available power supply voltages for single phase are 120 volt and 240 volt. 120 volts is generally used on motors no larger than 1/3 horsepower. Three phase voltages generally available are 208 volt, 240 volt, 480 volt and 600 volt. Since there is a voltage drop between the
power source and the electric motor, the single phase motors are rated either 115 volt or 230 volt. Three phase motors are rated 200 volt, 230 volt, 460 volt and 575 volt.

 

Since it is rather easy to build a motor suitable for use on two voltages as long as they are in the ratio of 2-to-1, it is common to specify single phase motors 115/230 volt. It is also common to specify three phase motors 230/460 volt. Occasionally three phase motors are designated 200- 230/460 volt. This means that the motor can be operated on 200 volts when it is connected for 230 volts. When the 230 volt motors operated on 200 volts, there is always a sacrifice in torque capability and usually a sacrifice in overload capability.

 

 

 

 

An alternative to the conventional schematic diagram in AC power control systems is the ladder diagram. In this convention, the ”hot” and ”neutral” power conductors are drawn as vertical lines near the edges of the page, with all loads and switch contacts drawn between those lines like rungs on a ladder: