duty cycle
Let an agent explain duty cycle by definition, calculation and use in electronics, equipment ratings and radio regulations.
Research draft, second pass
A second pass drafted this model: the structure a model of this thing needs, and what is known about it in the world. The line under this one says how the second half was obtained - researched against sources, or recalled without web access, in which case nothing here was read anywhere and every claim is a lead to verify. Unreviewed either way.
written by Claude from model knowledge without web access - no source was read, every claim is a lead to verify
Researched by: Claude
Purpose and description
Let an agent explain duty cycle by definition, calculation and use in electronics, equipment ratings and radio regulations.
The fraction of time a signal, device or system is active within a repeating period, expressed as a percentage, as in pulse-width modulation, motor and welder duty ratings and radio transmitter duty cycle limits in certain frequency bands.
What it is for: Electronics, power control, equipment ratings and radio compliance.
It can be calculate duty cycle from on-time and period; use pulse-width modulation to control power; read equipment duty cycle ratings; comply with radio duty cycle limits.
Distinguishing features
Ratio of on-time to period
Expressed as a percentage
Controls average power
Used in ratings and rules
What it looks like
Not physical; seen as pulse trains on oscilloscopes and ratings on labels.
How it is recognised
Percentages on specification labels
Rectangular pulse waveforms
Frequency describes repetition rate, not on-time share
Related models
is a kind of - category
is used in - technique
is related to - average value
is regulated in - regulation
In practice
Families and kinds
PWM duty cycle
motor and welder duty ratings
radio transmission duty cycle
intermittent operation ratings
Standards and regulation
IEC 60974-1 duty cycle for arc welding equipment
ETSI EN 300 220 for short range devices
Motor duty types in IEC 60034-1
Failure modes and hazards
Overheating from exceeding duty ratings
Radio non-compliance
Misreading the reference period
Where this came from
wikidata · CC0 1.0
Drafted structure
Bundle to layer to finding to question, as the second pass will find it: 4 bundles · 8 layers · 8 findings · 16 questions.
Calculate Definition.
Ratios define duty cycle.
Ratio
On-time and period.
Ratio
Calculation.
- What is the duty cycle given this on-time and period? measurement
- What average value results? measurement
Measure
Oscilloscope.
Measure
Measurement.
- How can duty cycle be measured with an oscilloscope or meter? action
- What accuracy is needed? boundary
PWM Power control.
PWM controls power.
Control
Using PWM.
Control
PWM control.
- How does changing duty cycle control motor speed or LED brightness? definition
- Which frequency is appropriate? provenance
Design
Circuit design.
Design
Circuit design.
- Which components handle the switching losses at this duty cycle? provenance
- How is heat managed? action
Ratings Equipment ratings.
Ratings prevent damage.
Welder
Welder duty.
Welder
Welder duty cycle.
- What does a 60 percent duty cycle rating mean for this welder, according to its standard? definition
- What happens if it is exceeded? boundary
Motor
Motor duty types.
Motor
Motor duty types.
- Which duty type applies to this motor? provenance
- Is it suitable for continuous use? boundary
Radio Spectrum rules.
Rules limit transmission.
Limits
Duty cycle limits.
Limits
Radio duty cycle limits.
- What duty cycle limits apply to this frequency band here? provenance
- How is it calculated over the reference period? definition
Compliance
Testing.
Compliance
Compliance.
- How can a device be tested for duty cycle compliance? provenance
- Which standard applies? provenance
What the second pass must settle
- Should application areas be separate entries?
- How should standards be linked?
- How should radio limits be localised?