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frequency controlled ac motor drive - Allen
frequency controlled ac motor drive - Allen

... machines whose speed depends upon applied frequency, pole pair number, and load torque. At a constant supply voltage and frequency, if the effect of temperature variations is disregarded, the motor torque will depend upon slip - Shown in Figure as An. At a positive slip, the squirrel cage machine wi ...
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2110 series Argon Ion laser power supplies
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... Indicate your requirements by selecting one option from each configuration table. For more information on this or other products and their availability, please contact your local JDS Uniphase sales representative or JDS Uniphase directly at 408 434-1800, or by fax 408 954-1177, or via email at sales ...
< 1 ... 1156 1157 1158 1159 1160 1161 1162 1163 1164 ... 1974 >

Mains electricity



Mains electricity is the general-purpose alternating-current (AC) electric power supply. In the US, electric power is referred to by several names including household power, household electricity, house current, powerline, domestic power, wall power, line power, AC power, city power, street power, and grid power.The two principal properties of the electric power supply, voltage and frequency, differ between regions. A voltage of (nominally) 230 V and a frequency of 50 Hz is used in Europe, most of Asia, most of South America and Australia. In North America, the most common combination is 120 V and a frequency of 60 Hz. Other voltages exist, and some countries may have, for example, 230 V but 60 Hz. This is a concern to travelers, since portable appliances designed for one voltage and frequency combination may not operate or may be destroyed by another.The use of different plugs and sockets in different regions provides some protection from accidental use of appliances with incompatible voltage and frequency requirements.
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