lệch pha
Definition
Noun (Physics/Engineering):
- Phase difference: A condition where two or more periodic signals (such as alternating currents, sound waves, or light waves) of the same frequency do not reach their corresponding points (like maximum or zero value) at the same time.
- Being out of phase: The state of having a phase difference.
Adjective:
- Out of phase: Describing signals or waves that are not synchronized.
Usage Examples
Noun:
- Sự lệch pha giữa điện áp và dòng điện cần được tính toán. (The phase difference between voltage and current needs to be calculated.)
- Lệch pha là một khái niệm quan trọng trong kỹ thuật điện. (Phase difference is an important concept in electrical engineering.)
Adjective:
- Hai sóng âm thanh này hoàn toàn lệch pha. (These two sound waves are completely out of phase.)
- Tín hiệu đầu ra bị lệch pha so với tín hiệu đầu vào. (The output signal is out of phase with the input signal.)
Advanced Usage
- In power systems, a significant phase difference between voltage and current leads to "low power factor," which is inefficient.
- Phase shift is a related term often used interchangeably with phase difference, though it can specifically refer to the intentional creation of a phase difference.
Variants and Related Words
Góc lệch pha (n): Phase angle, phase shift angle.
- Góc lệch pha được đo bằng độ hoặc radian. (The phase angle is measured in degrees or radians.)
Sự lệch pha (n): The noun form emphasizing the state or phenomenon of being out of phase.
Synonyms
- Phase shift: Often used synonymously, especially for the difference itself.
- Out of sync: A more general, non-technical synonym for being unsynchronized.
Related Technical Terms
- Đồng pha (in phase): The opposite state, where waves or signals are perfectly synchronized.
- Hiệu chỉnh pha (phase correction): The process of adjusting signals to be in phase.