| This thesis presents the design of a MEMS-based power disconnect system for use with the proposed 42V automotive power system. High voltage power systems are prone to arcing during system disconnections. The high arcing energy may pose electric shock hazards to human and cause severe damage to the systems. The purpose of this power disconnect system is to eliminate arcing occurrence. The system consists of a packaging cover, a MEMS sensor, a readout circuit, and a relay. In the presence of physical contact from a service technician, the cover transforms the macroscopic input force into a fine motion onto the MEMS sensor. In response to the motion, the readout circuit will trigger a signal to the relay, which will then electronically turn off the power supply prior to the physical interruption of the electrical contacts. Without power supplied to the connector, arcing will be eliminated. |
