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SIMULATION OF THE ELECTROMAGNETIC (模拟的电磁)
SIMULATION OF THE ELECTROMAGNETIC SOLENOID
USING MATLAB SIMULINK
System description and principle of operation:
Introduction:
Electromagnetic solenoid is the common electromechanical actuator for linear (translational)
motion. It is consisted of the magnetic circuit (body of solenoid, magnetic subsystem), one or several
electrical inputs (electrical subsystem) and mechanical circuit (mechanical subsystem). The construction
of the solenoids could be quite sophisticated and typical application are digitally controlled compact
pumps, electromagnetic valves, circuit breakers, micro machines, robotics.
ENERGY BALANCE
dWe – electrical energy delivered
from/to electrical subsystem.
dWm – mechanical energy delivered
from/to mechanical subsystem.
dWf - magnetic energy stored in the
coupling fields.
1
In a cylindrical ferromagnetic steel shell a cylindrical movable steel plunger has been placed.
The plunger is connected to spring. Inside the shell, a coil is connected to DC voltage source. As a result
of energizing coil, the electric energy will be transferred to magnetic field energy. The electromagnetic
force will move plunger in a positive direction of coordinate (x) and decrease the reluctance of the
magnetic circuit (increase inductance). At the end of this process, electromagnetic fo
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