Low-frequency and low-loss energy management chip based on piezoelectric effect

A piezoelectric effect and energy management technology, which is applied in the direction of adjusting electrical variables, electrical components, and output power conversion devices, can solve problems such as output voltage ripple, low switching frequency, and reliability drop.
CN103647463AActive Publication Date: 2014-03-19DALIAN UNIV OF TECH
7 Cites 9 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
DALIAN UNIV OF TECH
Publication Date
2014-03-19

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention belongs to the technical field of energy, power supply and micro electronics, and relates to a low-frequency and low-loss energy management chip based on a piezoelectric effect, wherein the energy management chip collects environmental energy from a piezoelectric element and provides a voltage-stabilized power supply for micro-power equipment through energy management. The chip comprises an SSHI circuit and a DC-DC converter circuit, and is characterized in that the SSHI circuit can collect more energy of the piezoelectric element; and the DC-DC converter circuit can operate at low frequency, and the width of a power tube of the DC-DC converter circuit is smaller than that of a general commercial power tube. Compared with a piezoelectric energy management circuit in the prior art, the chip provided by the invention can obviously reduce the power consumption, is not only suitable for collecting more energy at a high-vibration level, but also capable of collecting energy effectively at a low-vibration level, thereby effectively improving the energy collection efficiency.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention belongs to the technical fields of energy, power supply and microelectronics, and relates to an energy management chip, which collects vibration energy from a piezoelectric element and provides a stable voltage power supply for micropower equipment through energy management. Background technique

[0002] Over the past decade, thanks to advances in energy conversion and low-power electronics, energy harvesters have been extensively studied and applied, the most prominent example being powering wireless sensor networks. Its main bottleneck is the power supply of each node. Currently, there are many forms of energy in the environment, and their energy densities are shown in Table 1.

[0003] Table 1 Energy density in the environment

[0004] the energy Energy Density Solar (outdoor) 15000uW / cm 3 Solar (indoor) 10uW / cm 3 vibration (piezoelectric) 250uW / cm 3 Temperature difference (...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More