1508 Topology Optimization for Design of Thermoelectric Actuator Utilizing Peltier Effect

Thermal actuators are devices which can generate motion using amplified thermal expansion effects in certain portions of compliant structures, and such can be used in Micro-Electro Mechanical Systems (MEMS). In typical thermal actuators, the temperature increases are achieved by electrical resistive heating. This paper proposes a topology optimization method applied for the conceptual design of thermal actuator using thermoelectric devices as heat control systems. The thermoelectric devices enable us to utilize both heating and cooling effects so that complex actuator motion can be achieved. In this paper, first, the design requirements for thermal actuators using thermoelectric devices are clarified and a topology optimization problem for the thermal actuator design problem is formulated. Next, topology optimization using the level set method is applied to solve the optimization problem. Finally, one example of thermal actuator design problems using thermoelectric devices is presented to confirm the usefulness of the proposed method.