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KR-20260066795-A - Power generation devices and electrical equipment

KR20260066795AKR 20260066795 AKR20260066795 AKR 20260066795AKR-20260066795-A

Abstract

A power generation device according to one embodiment of the present technology comprises a transmission unit and a rectifier circuit. The transmission unit is connected directly or via capacitive coupling to at least one heat sink installed in an electrical device and having a potential different from the GND of the electrical device, thereby transmitting alternating current power of electronic noise generated in the at least one heat sink. The rectifier circuit rectifies the alternating current power transmitted by the transmission unit and outputs direct current power.

Inventors

  • 요시노 요시타카
  • 요시다 토시카즈

Assignees

  • 소니 세미컨덕터 솔루션즈 가부시키가이샤

Dates

Publication Date
20260512
Application Date
20240826
Priority Date
20230922

Claims (20)

  1. A transmission unit installed in an electrical device and connected directly or by capacitive coupling to at least one heat sink having a potential different from the GND of the electrical device, and transmitting alternating current power of electromagnetic noise generated in said at least one heat sink; A rectifier circuit having a DC power output by rectifying AC power transmitted by the above-mentioned transmission unit, Power generation device.
  2. In paragraph 1, A high-pass filter further provided between the heat sink connected to the transmission unit and the GND of the electrical device. Power generation device.
  3. In paragraph 2, The above high-pass filter passes alternating current components of a frequency band higher than the frequency band rectified by the above rectification circuit. Power generation device.
  4. In paragraph 1, The above rectifier circuit has a pair of input terminals, and The transmission unit connects different heat sinks to each of the pair of input terminals, or connects the heat sink to one of the pair of input terminals. Power generation device.
  5. In paragraph 4, The above transmission unit electrically connects the input terminal and the heat sink, Power generation device.
  6. In paragraph 5, Further comprising a high-pass filter installed between the heat sink connected to the transmission unit and the GND of the electrical device, The transmission unit above connects different heat sinks to the pair of input terminals, respectively, and The above high-pass filter is installed on at least one side of the heat sink connected to the above pair of input terminals, Power generation device.
  7. In paragraph 5, The transmission unit above connects the heat sink to one of the pair of input terminals and connects the GND of the electrical device directly or through a capacitor to the other of the pair of input terminals. Power generation device.
  8. In paragraph 1, The above electrical device has a primary circuit supplied with power from a predetermined power source and a secondary circuit electrically isolated from the primary circuit, The above at least one heat sink is installed in the primary circuit, and The above rectifier circuit is installed in the above secondary circuit, Power generation device.
  9. In paragraph 4, The above transmission unit has a transformer and connects the input terminal and the heat sink through the transformer. Power generation device.
  10. In Paragraph 9, Further comprising a high-pass filter installed between the heat sink connected to the transmission unit and the GND of the electrical device, The transmission unit above connects different heat sinks to the pair of input terminals, respectively, and The above high-pass filter is installed on either side of the heat sink connected to the above pair of input terminals, Power generation device.
  11. In Paragraph 9, The above transmission unit connects the heat sink to one of the pair of input terminals and connects the GND of the electrical device to the other of the pair of input terminals through a capacitor. Power generation device.
  12. In paragraph 4, The above transmission unit has an insulating sheet disposed in contact with the heat sink and a conductive sheet connected to the heat sink by capacitive coupling through the insulating sheet. The above input terminal is connected to the above conductive sheet, Power generation device.
  13. In paragraph 4, The above at least one heat sink comprises a plurality of heat sinks, and The transmission unit has a conductive member that electrically connects two or more of the plurality of heat sinks, and connects the two or more heat sinks connected by the conductive member to the input terminal. Power generation device.
  14. In paragraph 1, A capacitor having a capacitor element that stores DC power output from the above rectifier circuit, and further comprising a capacitor unit that controls the charging or discharging of the capacitor element according to the charging status of the capacitor element. Power generation device.
  15. In Paragraph 14, The above-mentioned capacitor is a battery, and The above-mentioned capacitor has a charging control unit installed between the battery and the rectifier circuit and charging the battery according to the charging status of the battery. Power generation device.
  16. In Paragraph 14, The above-mentioned capacitor is a battery, and The above capacitor has a first switch element installed between the battery and the rectifier circuit, and a first switching control unit that switches the first switch element to OFF when the voltage of the battery becomes greater than or equal to a first threshold voltage. Power generation device.
  17. In Paragraph 14, The above-mentioned capacitor is a capacitor, The above capacitor unit has a second switch element installed between the capacitor and a load to which power is supplied to the capacitor, and a second switching control unit that switches the second switch element to ON when the voltage of the capacitor becomes greater than or equal to a second threshold voltage. Power generation device.
  18. In paragraph 1, further comprising at least one heat sink, Power generation device.
  19. In paragraph 1, The above electrical device is an industrial device, Power generation device.
  20. As an electrical device, At least one heat sink with a potential different from GND, and Includes a power generation device, The above power generation device is, A transmission unit connected directly to or by capacitive coupling to at least one heat sink, and transmitting alternating current power of electronic noise generated in at least one heat sink, and A rectifier circuit having a DC power output by rectifying AC power transmitted by the above-mentioned transmission unit, Electrical devices.

Description

Power generation devices and electrical equipment The present technology relates to power generation devices and electrical equipment applicable to environmental power generation, etc. Recently, devices for performing energy harvesting that harvest power from one's surroundings are being developed. For example, Patent Document 1 describes an antenna device for harvesting power from a metal part of an industrial product. In this antenna device, a metal part installed in an industrial product, such as various electrical devices or metal racks, is used as an antenna to harvest electric field energy induced in the metal part as power. By this method, electric field energy containing low-frequency components called quasi-electrostatic fields or high-frequency components such as electromagnetic waves propagating through space can be harvested (paragraphs [0011], [0014], [0032], [0033] of the specification of Patent Document 1, FIG. 1, FIG. 13, etc.). FIG. 1 is a schematic diagram showing an example of the configuration of a power generation device according to a first embodiment of the present technology. FIG. 2 is a block diagram showing a functional configuration example of the power generation device illustrated in FIG. 1. Figure 3 is a schematic diagram showing an example of a noise countermeasure for a heat sink used as a comparative example. Figure 4 is a schematic diagram showing another example of noise countermeasures in a heat sink used as a comparative example. Figure 5 is a schematic diagram showing an example of a connection of a heat sink used in a power generation device. Figure 6 is a schematic diagram showing an example of a high-pass filter. Figure 7 is a graph showing the frequency characteristics of a transmission line equipped with the high-pass filter shown in Figure 6. Figure 8 is a schematic diagram showing another example of a high-pass filter. FIG. 9 is a schematic diagram showing another configuration example of a power generation device according to the present embodiment. FIG. 10 is a schematic diagram showing another configuration example of a power generation device according to the present embodiment. FIG. 11 is a schematic diagram showing another configuration example of a power generation device according to the present embodiment. FIG. 12 is a schematic diagram showing another configuration example of a power generation device according to the present embodiment. Figure 13 is a circuit diagram showing an example of a rectifier circuit configuration. Figure 14 is a graph illustrating the diode characteristics of a rectifier circuit. Figure 15 is a table explaining the diode characteristics of a rectifier circuit. FIG. 16 is a schematic circuit diagram showing an example of the configuration of the capacitor section. FIG. 17 is a schematic circuit diagram showing another configuration example of the capacitor section. FIG. 18 is a schematic circuit diagram showing another configuration example of the capacitor section. FIG. 19 is a schematic diagram showing an example of the configuration of a power generation device according to a second embodiment. FIG. 20 is a block diagram showing a functional configuration example of the power generation device illustrated in FIG. 19. FIG. 21 is a schematic diagram showing an example of the configuration of a power supply board including a primary side circuit and a secondary side circuit. FIG. 22 is a schematic diagram showing another configuration example of a power generation device according to the present embodiment. FIG. 23 is a schematic diagram showing another configuration example of a power generation device according to the present embodiment. Figure 24 is a graph showing the charging characteristics of a battery by a power generation device. Figure 25 is a graph showing the discharge characteristics of a battery by a power generation device. Figure 26 is a schematic diagram showing an example of application of a power generation device. FIG. 27 is a schematic diagram showing an example of the configuration of a power generation device according to a third embodiment. Figure 28 is a graph showing the noise characteristics of a heat sink installed in the primary circuit. FIG. 29 is a schematic diagram showing the circuit configuration of a power generation device using a heat sink in the primary circuit. FIG. 30 is a graph showing the discharge characteristics of a battery charged using the power generation device shown in FIG. 29. Figure 31 is a schematic diagram showing the circuit configuration of a power generation device with impedance matching. Figure 32 is a graph showing the discharge characteristics of a battery charged using the power generation device shown in Figure 31. FIG. 33 is a schematic diagram showing the circuit configuration of a power generation device that harvests power from two heat sinks. Figure 34 is a graph showing the discharge characteristics of a battery charged using the power generation device shown