LIVE EXPERIMENT 01 / THERMO-MECHANICAL SYSTEM

Bimetallic Snap Switch

Observe thermal buckling, contact hysteresis and energy transfer.

SIMULATION RUNNINGWEBGL2 ENGINE

DISC TEMPERATURE 01

22.0°C

Ambient equilibrium

CONTACT STATE 02

CLOSED

CURRENT FLOW ENABLED

DISC DEFLECTION 03

−0.450mm

SIGNED SNAP COORDINATE

LOAD CURRENT 04

0.80A

RESISTIVE 24V CIRCUIT

FIGURE 01—A

BIMETALLIC SNAP DISC / EXPOSED ASSEMBLY

REAL-TIME 3DX 0024.3
Y 0016.2

01 Bimetal disc DOUBLE-WELL ACTUATOR

02 Snap contact NC / HYSTERETIC

03 Heater winding CONTROLLED INPUT

✥DRAG TO ORBITSCROLL TO ZOOMCLICK DISC TO HEAT

RENDERER / WEBGL2 ● 3D ACTIVE

THERMAL RESPONSETEMPERATURE · DISPLACEMENT

TEMPERATURE DISPLACEMENTTIME (s) →

◉EXPERIMENT CONTROL

B2–LAB / 1.0

01 EXPERIMENT PRESETS

02 THERMAL PARAMETERS

Heater power42 W

0 W90 W

Ambient temperature22 °C

0 °C55 °C

Forced ventilation0.50

STILL AIRMAX COOLING

Thermal mass12 J/K

4 J/K40 J/K

03 SNAP MECHANISM

High snap setpoint84 °C

65 °C170 °C

Hysteresis width30 °C

10 °C70 °C

Thermal CTE mismatch14 ppm/K

8 ppm/K26 ppm/K

NOMINAL TRANSITIONS54.0°C ↔ 84.0°CActual crossing varies with thermal ramp and inertia.

04 ELECTRICAL LOAD

Voltage 24 V Resistance 30 Ω

05 RUN CONTROLS

TIME SCALE ×4.00

CLOSED-LOOP HEATER CONTROLHeater follows NC snap contact

AUTO ORBITHEAT MOTES

06 SWITCHING EVENTS

No switching events yet.
Increase the heater power to trigger a snap.

LABORATORY MODEL

The bimetal cap is visually enlarged. Snap-through uses a calibrated nonlinear double-well approximation; not a certified thermostat design model.