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The respective characteristics of the power spring terminal and power connector
1. Definition of current carrying capacity (current magnitude) for power and signal spring terminals
The influence of temperature in power supply applications
Definition of rated current of connectors
Provisions on temperature rise of connectors in various testing standards
The controversy surrounding the allowable temperature rise of connectors
The impact of testing methods on the temperature rise of connectors
The impact of connector status on current carrying capacity testing
Three influencing factors for testing the current carrying capacity of connectors
(1) Overview of connector temperature rise
The balance between heat generation and heat dissipation in connectors
The generation of heat from connectors
There are three ways for connectors to dissipate heat
Thermal radiation
Heat convection
Heat conduction
(2) The generation of connector heat and body resistance
The specific resistance requirements for the power supply spring terminal and signal spring terminal
How to calculate the resistance of the spring terminal body
(3) The generation of heat in connectors and local superheat at interfaces
Resistance heat at the connector interface
How is the local ultra-high temperature generated at the connector interface
The calculation formula for local ultra-high temperature at the connector interface
The local ultra-high temperature characteristics of the connector interface
The harm of local ultra-high temperature at the connector interface
Continuous current and instantaneous current of 3 connectors
Continuous current; Instantaneous current; Overload current
The loading process of current
Determination of instantaneous current
The quantitative relationship between the instantaneous current of common coatings and the contact resistance of connectors
Quantitative relationship between connector overload current, overload time, and rated current
Design standards for power supply spring terminals
(1) Local ultra-high temperature standards
Four local ultra-high temperature standards
Source of local ultra-high temperature standards/curve relationship between local ultra-high temperature and contact voltage
(2) The relationship between local ultra-high temperature standards and contact resistance
The quantitative relationship between the separation interface, permanent connection interface, and contact resistance and current at the end of product life derived from local ultra-high temperature standards
Discussion on the quantitative relationship between the contact resistance of the power supply spring terminal and the current
(3) Consideration of the resistance of the spring terminal body
Reduce the resistance of the spring terminal body
How to choose copper (alloy) to reduce the resistance of spring terminal body and improve heat dissipation ability
Calculation of body resistance
(4) Consideration of connector contact resistance
How to reduce contact resistance through multi contact contact of power supply spring terminals
How to improve contact reliability of power supply spring terminal with multiple contacts
The multi contact contact of the power spring terminal enhances the insertion and extraction life
5. Distribution of current
(1) Dedicated power spring terminal
Size limit for dedicated power supply spring terminals
The connection requirements for dedicated power supply spring terminals have been increased
Simplified analysis of dedicated power supply spring terminals
The influence of the size of wire conductors on the rated current of connectors
The effect of environmental temperature on the rated current of connectors/derating current/derating curve
The effect of increasing the heat dissipation area on the rated current of the connector
(2) Parallel multi terminal applications
The advantages of parallel multi terminal applications
(3) Parallel connection