trifásica
English translation: three-phase
| 21:33 Aug 6, 2004 |
| Spanish to English translations [PRO] Tech/Engineering - Mechanics / Mech Engineering / Railroad installation | |||||
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|  Selected response from: Maria Luisa Duarte Spain Local time: 10:04 | ||||
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| Summary of answers provided | ||||
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| 5 +2 | three-phase |
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| 5 | three-phased |
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| 5 | 3-phase |
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| 4 | triphase |
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Answers
3 mins confidence: 
| trifásica three-phased Explanation: HIH |
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3 mins confidence:
| trifásica 3-phase Explanation: I don't think this needs further explanation |
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9 mins confidence: 
| trifásica triphase Explanation: triphase |
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10 mins confidence: peer agreement (net): +2
peer agreement (net): +2| trifásica three-phase Explanation: Modern electronics has given us the AC drive. It has only become available with modern electronics because the speed of a 3-phase AC motor is determined by the frequency of its supply but, at the same time, the power has to be varied. The frequency used to be difficult to control and that is why, until the advent of modern electronics, AC motors were almost exclusively used in constant speed applications and were therefore unsuitable for railway operation. A modern railway 3-phase traction motor is controlled by feeding in three AC currents which interact to cause the machine to turn. The three phases are most easily provided by an inverter which supplies the three variable voltage, variable frequency (VVVF) motor inputs. The variations of the voltage and frequency are controlled electronically. Reference: http://www.trainweb.org/railwaytechnical/tract-02.html |
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