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power circuit

A power circuit and circuit technology, applied in battery circuit devices, circuit devices, photovoltaic power generation, etc., can solve the problem of wasting power circuit power and achieve good start-up performance

Active Publication Date: 2020-11-27
ORMON CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, if the power required to drive the step-down chopper is obtained from the input side capacitor, the power supplied from the power generator to the power supply circuit will be wasted due to the high voltage.

Method used

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no. 1 approach

[0035] figure 1 The outline of the power supply circuit according to the first embodiment of the present invention is shown in .

[0036]As shown in the figure, the power supply circuit according to this embodiment includes input terminals In1, In2, and output terminals Out1, Out2. In addition, the power supply circuit further includes a full-wave rectifier circuit D1 , a primary capacitor C1 , a step-down chopper 10 , a diode D3 , a secondary capacitor C2 , an energy storage element C3 , semiconductor switches SW2 and SW3 , and a control circuit 20 .

[0037] The input terminals In1 and In2 are terminals for connecting an AC generator. The input terminals In1 and In2 are usually connected to an AC power generator (for example, an electret vibration power generator) with a low power generation (for example, 100 μW) for outputting a large-amplitude (for example, 200 V) AC. The output terminals Out1 and Out2 are terminals for connecting a load. The output terminals Out1 and O...

no. 2 approach

[0107] Next, the structure and function of the power supply circuit according to the second embodiment of the present invention will be described focusing on parts different from the power supply circuit according to the first embodiment described above.

[0108] Figure 5 A schematic configuration of the power supply circuit according to this embodiment is shown.

[0109] will Figure 5 and figure 1 As can be seen from the comparison, the power supply circuit according to the present embodiment is a circuit in which the reset circuit 28 is added to the power supply circuit according to the first embodiment.

[0110] The reset circuit 28 is a circuit that discharges the primary capacitor C1 and lowers VC1 to a voltage lower than the first predetermined voltage when VC2 falls below the minimum voltage required for operating the control circuit 20 (this embodiment mode is 0V).

[0111] That is, the power supply circuit according to the first embodiment is usually not in a st...

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PUM

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Abstract

The power supply circuit of the present invention includes: a primary capacitor for temporarily storing electric power from a power generating device, an electric storage element for storing electric power supplied to a load, and a step-down chopper for using the electric power stored in the primary capacitor to store The electrical element is charged, and the secondary capacitor is connected to the primary capacitor in a manner that can assume a first state and a second state, the first state being the application of a voltage across the secondary capacitor across the primary capacitor state, the second state is a state in which the voltage between the two ends of the primary capacitor is not applied between the two ends of the secondary capacitor, and the control circuit operates with the secondary capacitor as a power supply, and the two ends of the primary capacitor When the voltage between the terminals is less than the first specified voltage, the step-down chopper is not driven, and the secondary capacitor is in the first state, and when the voltage between the two ends of the primary capacitor is above the first specified voltage , put the secondary capacitor in the second state, and drive the step-down chopper to charge the power storage element with the electric power stored in the primary capacitor.

Description

technical field [0001] The present invention relates to a power supply circuit, and more particularly to a power supply circuit for converting high-voltage, low-current power generated by a power generating device into a low voltage for operating a load (electronic circuit). Background technique [0002] There is known a power supply circuit that converts high voltage from a power generating device capable of generating minute power, such as an electret vibration power generating device, into a low voltage for operating a load (electronic circuit). [0003] This kind of power supply circuit adopts the following structure, that is, temporarily stores the electric power from the generator in the small-capacity input-side capacitor, and uses the step-down chopper to transfer the power stored in the input-side capacitor to the large-capacity output-side capacitor. to charge. Therefore, if the electric power required to drive the step-down chopper is obtained from the input side...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M3/155
CPCH02M1/36H02M7/06H02M1/0006Y02E10/56G05F1/67H02J7/35H02M3/158H02M7/12
Inventor 锅藤实里松浦圭记木村结衣
Owner ORMON CORP