Selection Guide of a Traction Solenoid (Linear Solenoid Actuator)
The selection process of a traction solenoid (also referred to as a pull solenoid or a linear solenoid actuator) is quite critical for proper function, durability, and compatibility of the device with your particular case. Regarding engineers who need to buy one, the following may serve as a useful selection guide.
🔧 1. Estimate the required force
Force is the most crucial parameter.
Establish the force level for a given stroke length.
Note that the force decreases as the stroke increases.
Think about the safety margin that can vary from 20% to 50%.
A tip:
be certain to consult the vendor’s force vs. stroke graph.
📏 2. Determine the stroke length.
The stroke refers to the distance the plunger moves.
Short strokes provide more force than long ones.
Several mm to tens of mm is a common stroke value.
Important aspect to take into account:
ensure that the traction solenoid produces sufficient force at a correct stroke position.
3, Define Rated Voltage
Common voltage options include:
12V DC
24V DC
Custom voltages
Important:
Please ensure that the power supply is compatible.
Sufficiently stable voltage ensures consistent performance.
Low voltage results in low force production.
High voltage leads to overheating.
4. Specify the Duty Cycle and Mode of Operation
The duty cycle characterizes the period of time during which the traction solenoid can remain active.
Continuous duty (100%) provides prolonged performance.
Intermittent duty refers to the on-off operation sequence.
Consider the following factors:
Heat generation
Cooling conditions
Application usage frequency
5. Working Conditions of Environment
Estimate environmental characteristics:
Temperature range
Humidity
Exposure to dust and moisture
Corrosive conditions
Solution:
Choose an appropriate solenoid enclosure (open frame/tubular).
Consider applying protection coating/sealing.
6. Solenoid Type Selection
Various types are designed for specific applications:
Open-Frame Solenoid: economical and convenient design
Tubular Solenoid: small size, safe to use, efficient
Push-Pull Solenoid: bidirectional displacement
Latching Solenoid: energy-efficient, stays on without power supply
7. Dimensions and Installation Space Requirements
Measure the installation space
Orientation and mounting hole configuration
Ensure there is sufficient room for the plunger movement
Important aspect:
Sol’s operation efficiency can depend on mechanical interference.
8. Electrotechnical Specifications
Coil resistance
Power consumption
Power rating (W)
Connector type and wiring
Compatibility with the control system (PLC, PCB, etc.).
9. Speed and Response Time
Automation applications require fast responses
The speed is affected by voltage, coil design, and load
Short strokes react faster.
10. Lifetime Expectation
Consider the following aspects:
Expected number of cycles
Material quality
Plunger and spring durability
11. Customization Needs
In case standard options are not suitable:
Custom stroke length
Custom force output
Mounting customization
Custom winding or voltage
✅ Checklist of Required Solenoid Characteristics
Make sure you establish the following parameters before purchasing your traction solenoid:
Required force at the given stroke ✔
Length of stroke ✔
Voltage and power supply ✔
Duty cycle ✔
Environmental conditions ✔
Size and installation space ✔
Lifetime expectation ✔
