Vibration power generator, vibration power generating device and communication device having vibration power generating device mounted thereon
First Claim
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1. A vibration power generating device comprising:
- a vibration power generator,a rectifier circuit which rectifies an AC output voltage from the vibration power generator and converts the AC output voltage into a DC voltage,an output controlling circuit which controls an output from the rectifier circuit and inputs the output to a load circuit,a frequency detecting circuit which detects a vibration frequency of the vibration power generator,wherein the vibration power generator comprises;
an electrode group A consisting of a plurality of first electrodes, which group is formed on a first substrate,an electrode group B consisting of a second electrode and a third electrode, which group is formed on a second substrate,wherein any one of the electrode group A and the electrode group B is capable of vibrating in at least one direction which is within a plane parallel to the first substrate and the second substrate,each electrode in any one of the electrode group A and the electrode group B contains a film retaining electric charges,the electrode group A and the electrode group B are opposed to each other with a gap therebetween, andwhich generator generates power using change in overlapping area between the first electrode and the second electrode, andoutputs a signal depending on a frequency of the power generation using change in overlapping area between the first electrode and the third electrode,the signal which is output depending on the frequency of the power generation using change in overlapping area between the first electrode and the third electrode is transmitted to the frequency detecting circuit and, based on the signal, the frequency detecting circuit transmits a feedback signal to the output controlling circuit, andan impedance of the output controlling circuit is controlled based on the feedback signal from the frequency detecting circuit.
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Abstract
Electricity generated by a vibration power generator 200 can be extracted efficiently by providing the vibration power generator 200, a rectifier circuit bridge 205, an output controlling circuit 201, a load detecting circuit 202 and a frequency detecting circuit 204 and detecting a frequency of the vibration power generator 200 and then controlling an impedance of an output controlling circuit 101 depending on the frequency.
17 Citations
19 Claims
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1. A vibration power generating device comprising:
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a vibration power generator, a rectifier circuit which rectifies an AC output voltage from the vibration power generator and converts the AC output voltage into a DC voltage, an output controlling circuit which controls an output from the rectifier circuit and inputs the output to a load circuit, a frequency detecting circuit which detects a vibration frequency of the vibration power generator, wherein the vibration power generator comprises; an electrode group A consisting of a plurality of first electrodes, which group is formed on a first substrate, an electrode group B consisting of a second electrode and a third electrode, which group is formed on a second substrate, wherein any one of the electrode group A and the electrode group B is capable of vibrating in at least one direction which is within a plane parallel to the first substrate and the second substrate, each electrode in any one of the electrode group A and the electrode group B contains a film retaining electric charges, the electrode group A and the electrode group B are opposed to each other with a gap therebetween, and which generator generates power using change in overlapping area between the first electrode and the second electrode, and outputs a signal depending on a frequency of the power generation using change in overlapping area between the first electrode and the third electrode, the signal which is output depending on the frequency of the power generation using change in overlapping area between the first electrode and the third electrode is transmitted to the frequency detecting circuit and, based on the signal, the frequency detecting circuit transmits a feedback signal to the output controlling circuit, and an impedance of the output controlling circuit is controlled based on the feedback signal from the frequency detecting circuit. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A vibration power generator comprising:
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an electrode group A consisting of a plurality of first electrodes, which group is formed on a first substrate, an electrode group B consisting of a second electrode and a third electrode, which group is formed on a second substrate, wherein any one of the electrode group A and the electrode group B is capable of vibrating in at least one direction which is within a plane parallel to the first substrate and the second substrate, each electrode in any one of the electrode group A and the electrode group B contains a film retaining electric charges, the electrode group A and the electrode group B are opposed to each other with a gap therebetween, and the third electrode is formed such that a capacitance formed by the third electrode and the first electrode is smaller than the capacitance formed by the second electrode and the first electrode, which generator generates power using change in overlapping area between the first electrode and the second electrode, and outputs a signal depending on a frequency of the power generation using change in overlapping area between the first electrode and the third electrode. - View Dependent Claims (9, 10, 11, 12)
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13. A vibration power generating device which comprises:
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a vibration power generator comprising; an electrode group A consisting of a plurality of first electrodes, which group is formed on a first substrate, an electrode group B consisting of a second electrode and a third electrode, which group is formed on a second substrate, wherein any one of the electrode group A and the electrode group B is capable of vibrating in at least one direction which is within a plane parallel to the first substrate and the second substrate, each electrode in any one of the electrode group A and the electrode group B contains a film retaining electric charges, the electrode group A and the electrode group B are opposed to each other with a gap therebetween, and which generator generates power using change in overlapping area between the first electrode and the second electrode, and outputs a signal depending on a frequency of the power generation using change in overlapping area between the first electrode and the third electrode, and wherein the signal which is output depending on the frequency of the power generation using change in overlapping area between the first electrode and the third electrode is used as a signal indicating a power generation state of the vibration power generator. - View Dependent Claims (14, 15, 16, 17, 18, 19)
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Specification
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Current AssigneePanasonic Intellectual Property Management Co., Ltd. (Panasonic Holdings Corporation)
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Original AssigneePanasonic Intellectual Property Management Co., Ltd. (Panasonic Holdings Corporation)
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InventorsNakatsuka, Hiroshi, Kuranuki, Masaaki, Onishi, Keiji
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Primary Examiner(s)GONZALEZ, JULIO CESAR
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Application NumberUS13/130,877Publication NumberTime in Patent Office1,678 DaysField of Search310/300, 310/309, 310/308, 290/1.R, 322/2.R, 322/3US Class Current310/300CPC Class CodesH02N 1/08 with conductive charge carr...
