| 11. | Consequently, converters built with mercury arc valves are known as line-commutated converters ( LCC ).
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| 12. | As a result, they can be used to make " self-commutated converters ".
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| 13. | A major drawback of HVDC systems using line-commutated converters is that the converters inherently consume reactor.
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| 14. | These errors are detected, commutated, amplified, and used to control the antenna-positioning servos.
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| 15. | As a result, IGBTs can be used to make " self-commutated converters ".
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| 16. | With such converters, the harmonic spectrum is generally shifted to higher frequencies than with line-commutated converters.
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| 17. | Being self-commutated, the converter no longer relies on synchronous machines in the AC system for its operation.
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| 18. | SCRs do not turn off or " commutate " automatically when the gate control signal is shut off.
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| 19. | The basic building-block of a line-commutated HVDC converter is the " six-pulse bridge ".
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| 20. | In a brushed DC motor the field is static but the armature current must be commutated, so as to continually rotate.
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