Response Analysis of a Solenoid Valve (DP)

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Coupled analysis with magnetic fields, electrical circuits and motion This is a response analysis example for a solenoid valve, in which JMAG'fs powerful coupled-analysis features are applied. The valve to be analyzed is axially symmetric and has a stator at the top, with a moving plunger below and coils and housing surrounding them (See Figure 1). The stator, plunger and housing, which form a magnetic path, are of ferrite material with an electrical conductivity of zero. The coil is connected to a circuit consisting of capacitors, resistors and switches, and is energized by power stored in the capacitors controlled by switching the switches on/off.

Figure 1 - Motion and magnetic field models and Circuit model Enlarged View

Variations with time of terminal voltage and coil current, and attractive force acting on the plunger

Figure 2 - Variations with time of terminal voltage, coil current, and absorption force acting on rotor Enlarged View

The variations with time of the terminal voltage and coil current, and the attractive force acting on plunger are shown in Figure 2. This shows how each quantity varies in response to switching. Figure 3 represents the displacement response calculated at various values of the number of coil turns, spring constant and capacitance.

Figure 3 - Dependency on number of coil turns or spring constant or capacitance
Enlarged View	Enlarged View	Enlarged View