hysteresis loss
LowTechnical/Specialised
Definition
Meaning
The energy dissipated as heat in a magnetic material when it is subjected to a changing magnetic field, due to the lag (hysteresis) between the magnetisation of the material and the applied field.
In broader systems theory, it can metaphorically refer to any inefficiency or energy loss resulting from the lagged response of a system to a changing input, where the system's state depends on its history.
Linguistics
Semantic Notes
This is a compound technical noun. The concept is central to electromagnetism, electrical engineering, and materials science. It represents an undesirable but inherent power loss in transformers, motors, and other AC devices.
Dialectal Variation
British vs American Usage
Differences
No significant lexical or definitional differences. Spelling of related terms may follow regional conventions (e.g., magnetisation vs. magnetization).
Connotations
Purely technical term with identical connotations in both varieties.
Frequency
Equally low frequency and confined to identical technical contexts in both regions.
Vocabulary
Collocations
Grammar
Valency Patterns
The [device/material] exhibits a high hysteresis loss.Hysteresis loss in the [core] was calculated.Engineers aim to reduce hysteresis loss.Vocabulary
Synonyms
Neutral
Weak
Vocabulary
Antonyms
Usage
Context Usage
Business
Rarely used outside of technical procurement or R&D discussions concerning electrical component efficiency and lifecycle costs.
Academic
Common in physics, electrical engineering, and materials science textbooks, papers, and lectures.
Everyday
Virtually never used in everyday conversation.
Technical
The primary domain of use. Discussed in the design, specification, and testing of transformers, inductors, electric motors, and magnetic recording heads.
Examples
By Part of Speech
adjective
British English
- The hysteresis-loss component is significant in these alloys.
- They measured the hysteresis-loss characteristics.
American English
- The hysteresis-loss component is significant in these alloys.
- They measured the hysteresis-loss characteristics.
Examples
By CEFR Level
- The engineer explained that some energy is always wasted as heat in a transformer, a phenomenon called hysteresis loss.
- To improve efficiency, they needed materials with lower hysteresis loss.
- The total core loss is a summation of the hysteresis loss and the eddy current loss, both of which are frequency-dependent.
- Selecting an amorphous metal for the core dramatically reduced the hysteresis loss, leading to a cooler and more efficient motor.
Learning
Memory Aids
Mnemonic
Imagine a magnet being dragged through thick mud (the magnetic material). The mud resists and lags behind, getting hot from the friction. This 'magnetic friction' and the heat it creates is hysteresis loss.
Conceptual Metaphor
MAGNETIC FRICTION (The material's internal 'friction' against changing magnetism causes energy loss as heat.)
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- Avoid direct translation of 'loss' as 'потеря' in the sense of 'misplacing something'. The correct technical term is 'потери' (plural) as in 'потери на гистерезис'.
- Do not confuse 'hysteresis' with 'истерия' (hysteria). They are false cognates.
Common Mistakes
- Mispronouncing 'hysteresis' as /haɪˈstɛrəsɪs/ (like 'hysteria').
- Using it as a verb (e.g., 'The system hysteresis losses power' is incorrect).
- Confusing it with 'eddy current loss', which is a separate, concurrent phenomenon.
Practice
Quiz
What is the primary cause of hysteresis loss?
FAQ
Frequently Asked Questions
In magnetic devices, hysteresis loss is one specific mechanism that converts electromagnetic energy into heat. It is a type of heat loss, but not all heat loss is hysteresis loss.
No, it is an inherent property of ferromagnetic materials. It can only be minimised by using soft magnetic materials with a narrow hysteresis loop, like silicon steel or ferrites.
It is most critical in devices operating with alternating magnetic fields, such as power transformers, inductor cores, and the stators/rotors of AC electric motors and generators.
Hysteresis loss is due to the internal friction of magnetic domains realigning. Eddy current loss is due to circulating currents induced within the conductive core material itself. Both produce heat and are collectively called 'core loss'.