Electromagnetically Actuated Pumps

Electromagnetically actuated pumps Magnetic pumps Magnetohydrodynamic pumps... 

Electromagnetically actuated pumps Magnetohydrody-namic punps... 

An additional advantage of the integrated circuit technology is the ability to integrate the various components, such as the transducer, reactor, valve, pump etc., within the electronic system, forming refined flow-analysis systems on silicon wafers. Several approaches, such as electrostatic, electromagnetic, piezoelectric, thermopneumatic and thermoelectric can be employed for force transduction in the microvalves, these are also applicable to micropumps. Based on these approaches, two versions of micropumps have been developed. These are connected in parallel the first pump (dual pump) is activated with periodic two-phase voltage, while the second pump (the buffer pump) is driven by two piezoelectric actuators. Microsensors of two kinds are described below a thermopile based- and a thermistor based microbiosensor. 

Magnetic pumps are pumps using electromagnetic or magnetic fields to actuate and control fluid motion in microchannels. The application of electromagnetic or magnetic forces is a flexible way of manipulating fluids in lab-on-a-chip devices. 

In 2000, Unger et al. first used an elastic material (PDMS) and standard soft lithography processes to demonstrate a pneumatic pump with a three-membrane-actuator layout controlled by three external electromagnetic valves (EMV)> respectively [1]. Multilayer soft lithography to fabricate the pump and typical microchannel size was... 

Mechanical pumping Micromechanical pumps are usually based on the movement of a membrane, which results in periodic delivery of a fluid. The actuation schemes utilized for moving the membrane of a pump include piezoelectric, electrostatic, thermopneumatic, pneumatic, and electromagnetic devices, and shape memory alloys and electro wetting. The resulting fluid motion is pulsed, not continuous. The rotary displacement micropump is an example of a mechanical pump not based on membrane movement. External syringe... 

---