Abstract: An active cooling system is described. The active cooling system includes at least one cooling element that has a vent therein and is in communication with a fluid. The cooling element(s) are actuated to vibrate to drive the fluid toward a heat-generating structure and to alternately open and close at least one virtual valve corresponding to the vent. The virtual valve is open for a low flow resistance and closed for a high flow resistance. The vent remains physically open for the virtual valve being closed.

Abstract: A system including a plurality of cooling cells is described. Each of the cooling cells includes a support structure and a cooling element. The cooling element has a central region having an axis and a perimeter. The cooling element IS supported by the support structure at the central region and along the axis. At least a portion of the perimeter being unpinned. The cooling element is configured to undergo vibrational motion when actuated to drive a fluid toward a heat-generating structure. A portion of the cooling cells aligned along the axis are physically connected such that the cooling cells form an integrated cooling cell tile.

Abstract: A cooling system is described. The cooling system includes a cooling element having a central region and a perimeter. The cooling element is anchored at the central region. At least a portion of the perimeter is unpinned. The cooling element is in communication with a fluid. The cooling element is actuated to induce vibrational motion to drive the fluid toward a heat-generating structure.

Abstract: An active cooling system includes at least one cooling element that has a vent therein. The active cooling element is in communication with a fluid. The cooling element(s) are actuated to vibrate to drive the fluid toward a heat-generating structure and to alternately open and close at least one virtual valve corresponding to the vent. The virtual valve is open for a low flow resistance and closed for a high flow resistance. The vent remains physically open when the virtual valve is closed.

Abstract: A system including a cooling element and a support structure is described. The cooling element has a first side and a second side opposite to the first side. The cooling element is configured to undergo vibrational motion when actuated to drive a fluid from the first side to the second side. The support structure thermally couples the cooling element to a heat-generating structure via thermal conduction.

Abstract: A cooling system is described. The cooling system includes a cooling element having a central region and a perimeter. The cooling element is anchored at the central region. At least a portion of the perimeter is unpinned. The cooling element is in communication with a fluid. The cooling element is actuated to induce vibrational motion to drive the fluid toward a heat-generating structure.

Abstract: A cooling system including a support structure and a cooling element is described. The cooling element has a thickness and includes an anchored region and a cantilevered arm. The anchored region is coupled to and supported by the support structure. The cantilevered arm extends outward from the anchored region. The cantilevered arm includes at least one cavity therein. The at least one cavity has a depth of at least one-third and not more than three-fourths of the thickness of the cooling element. The cooling element is configured to undergo vibrational motion when actuated to drive a fluid for cooling a heat-generating structure.

Abstract: A cooling system is described. The cooling system includes a bottom plate, a support structure, and a cooling element. The bottom plate has orifices therein. The cooling element has a central axis and is supported by the support structure at the central axis. A first portion of the cooling element is on a first side of the central axis and a second portion of the cooling element is on a second side of the central axis opposite to the first side. The first and second portions of the cooling element are unpinned. The first portion and the second portion are configured to undergo vibrational motion when actuated to drive a fluid through the orifices. The support structure couples the cooling element to the bottom plate. The support structure is coupled with at least one of the cooling element or the bottom plate by diffusion bond(s).

Abstract: A cooling system is described. The cooling system includes a bottom plate, a support structure, and a cooling element. The bottom plate has orifices therein. The cooling element has a central axis and is supported by the support structure at the central axis. A first portion of the cooling element is on a first side of the central axis and a second portion of the cooling element is on a second side of the central axis opposite to the first side. The first and second portions of the cooling element are unpinned. The first portion and the second portion are configured to undergo vibrational motion when actuated to drive a fluid toward a heat-generating structure. The support structure couples the cooling element to the bottom plate. At least one of the support structure is an adhesive support structure or the support structure undergoes rotational motion in response to the vibrational motion.

Abstract: A cooling system is described. The cooling system includes a bottom plate, a support structure, and a cooling element. The bottom plate has orifices therein. The cooling element has a central axis and is supported by the support structure at the central axis. A first portion of the cooling element is on a first side of the central axis and a second portion of the cooling element is on a second side of the central axis opposite to the first side. The first and second portions of the cooling element are unpinned. The first portion and the second portion are configured to undergo vibrational motion when actuated to drive a fluid toward a heat-generating structure. The support structure couples the cooling element to the bottom plate. At least one of the support structure is an adhesive support structure or the support structure undergoes rotational motion in response to the vibrational motion.

Abstract: A cooling system including a support structure and a cooling element is described. The cooling element has a central region and a perimeter. The cooling element is supported by the support structure at the central region. At least a portion of the perimeter is unpinned. The cooling element is configured to undergo vibrational motion when actuated to drive a fluid toward a heat-generating structure. Further, the cooling element has a first side distal from the heat-generating structure and a second side proximate to the heat-generating structure. The support structure supports the cooling element from one of the first side and the second side.

Abstract: We use the AC Hall effect to characterize a magnetic field at an unknown frequency (or frequencies). The current to the Hall sensor is driven at a known frequency f. The output Hall voltage is characterized in a frequency range from f1 to f2 (with f<f1<f2 and f2?f1<2f). This provides a measurement of the magnetic field in a frequency range from f1?f to f2?f. The resulting measurement of magnetic field spectral components is phase-independent and requires no prior knowledge of exact magnetic field frequency.

Abstract: A flow chamber, a cooling system and a method are described. The flow chamber includes an upper chamber including a top wall, an actuator, and a lower chamber. The actuator is located distally from the top wall. The lower chamber receives fluid from the upper chamber when the actuator is actuated. The top wall includes at least one cavity therein. The cooling system utilizes cooling cells including the flow chamber. The method includes driving the actuator at a frequency that directs fluid through the flow chamber.

Abstract: A system including a cooling element and a support structure is described. The cooling element has a first side and a second side opposite to the first side. The cooling element is configured to undergo vibrational motion when actuated to drive a fluid from the first side to the second side. The support structure thermally couples the cooling element to a heat-generating structure via thermal conduction.

Abstract: A system including an orifice plate, a fan element and at least one channel is disclosed. The orifice plate has at least one orifice therein. The fan element is configured to undergo vibrational motion to drive a fluid through the orifice(s). The fluid is drawn through the channel(s) in response to the fluid being driven through the at least one orifice.

Abstract: A flow chamber, a cooling system and a method are described. The flow chamber includes an upper chamber including a top wall, an actuator, and a lower chamber. The actuator is located distally from the top wall. The lower chamber receives fluid from the upper chamber when the actuator is actuated. The top wall includes at least one cavity therein. The cooling system utilizes cooling cells including the flow chamber. The method includes driving the actuator at a frequency that directs fluid through the flow chamber.

Abstract: A system including a cooling element and a support structure is described. The cooling element has a first side and a second side opposite to the first side. The cooling element is configured to undergo vibrational motion when actuated to drive a fluid from the first side to the second side. The support structure thermally couples the cooling element to a heat-generating structure via thermal conduction.

Abstract: A cooling system including a support structure and a cooling element are described. The cooling element has a central region, a first cantilevered arm, a second cantilevered arm, and a piezoelectric. The cooling element is supported by the support structure at the central region. The piezoelectric extends across at least half of a length of the first cantilevered arm. The first and second cantilevered arms are configured to undergo vibrational motion when actuated to drive a fluid toward a heat-generating structure.

Abstract: A fluid flow system is described. The fluid flow system includes an actuator and a chamber having a feature therein. The actuator is configured to vibrate in response to a driving signal. The chamber is in communication with the actuator. The chamber is characterized by a fluidic resonant frequency. Vibration of the actuator tends to drive a fluid through the chamber. The feature is within the chamber and obstructs direct flow of the fluid within the chamber such that the fluidic resonant frequency is less than a nominal fluidic resonant frequency that would exist without the feature.

Abstract: A cooling system is described. The cooling system includes a bottom plate, a support structure, and a cooling element. The bottom plate has orifices therein. The cooling element has a central axis and is supported by the support structure at the central axis. A first portion of the cooling element is on a first side of the central axis and a second portion of the cooling element is on a second side of the central axis opposite to the first side. The first and second portions of the cooling element are unpinned. The first portion and the second portion are configured to undergo vibrational motion when actuated to drive a fluid toward a heat-generating structure. The support structure couples the cooling element to the bottom plate. At least one of the support structure is an adhesive support structure or the support structure undergoes rotational motion in response to the vibrational motion.