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a filter circuit

A filter circuit and control circuit technology, applied in electrical components, output power conversion devices, etc., can solve the problems of cost reduction, large space occupation, small space occupation, etc., and achieve area saving, cost reduction, and volume reduction. Effect

Active Publication Date: 2016-01-20
MORNSUN GUANGZHOU SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0031] In view of this, the purpose of the present invention is to solve the problems of high cost and large space occupation of existing filter circuits under wide input voltage ranges, and to provide a filter circuit that can provide suitable filter capacity for input voltages in different voltage ranges , and the implementation cost is relatively low and the space occupied is small

Method used

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no. 1 example

[0071] Figure 9 It shows the functional block diagram of the first embodiment, which is a functional block diagram drawn according to the original technical solution of the present invention.

[0072] Figure 10 Part 200 of the present invention shows the specific principle diagram of the first embodiment of the present invention; its connection relationship is completely the same as the relationship in the technical solution, including the positive terminal 104 and the negative terminal 105, including the voltage detection control circuit 102, a first capacitor C1 , a second capacitor C2, a first switch 103, the withstand voltage of the second capacitor C2 is less than the withstand voltage of the first capacitor C1; the voltage detection control circuit 102 includes three ports, the voltage detection input is positive 106, and the voltage detection input is negative 107 , the first output terminal 108; the positive terminal 104 is connected to the voltage detection input p...

no. 2 example

[0090] Figure 11 shows a schematic diagram of the second embodiment, Figure 11 The part 200 in it shows the specific schematic diagram of the second embodiment of the present invention, and its connection relationship fully complies with the relationship in the technical solution, including the positive terminal 104 and the negative terminal 105, including the voltage detection control circuit 102, and a first capacitor C1 , a second capacitor C2, a first switch 103, the withstand voltage of the second capacitor C2 is less than the withstand voltage of the first capacitor C1; the voltage detection control circuit 102 includes three ports, the voltage detection input positive 106, the voltage detection input negative 107, the first output terminal 108; the positive terminal 104 is connected to the voltage detection input positive 106 of the voltage detection control circuit 102, and the positive terminal 104 is also connected to one end of the first capacitor C1 (positive ele...

no. 3 example

[0104] Figure 12 shows the schematic diagram of the third embodiment, Figure 12 Part 200 of the present invention shows the specific schematic diagram of the third embodiment of the present invention, and its connection relationship fully complies with the relationship in the technical solution, including the positive terminal 104 and the negative terminal 105, including the voltage detection control circuit 102, and a first capacitor C1 , a second capacitor C2, a first switch 103, the withstand voltage of the second capacitor C2 is less than the withstand voltage of the first capacitor C1; the voltage detection control circuit 102 includes three ports, the voltage detection input positive 106, the voltage detection input negative 107, the first output terminal 108; the positive terminal 104 is connected to the voltage detection input positive 106 of the voltage detection control circuit 102, and the positive terminal 104 is also connected to one end of the first capacitor C1 ...

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Abstract

The invention discloses a filter circuit which comprises a first capacitor, a first switch, a second capacitor, and a voltage detection control circuit for detecting direct current input voltage, wherein the withstand voltage of the second capacitor is smaller than that of the first capacitor, the two ends of the first capacitor respectively are a positive terminal and a negative terminal of the filter circuit; the second capacitor is serially connected with the first switch; a series branch is connected with the first capacitor in parallel; the voltage detection input anode of the voltage detection control circuit is connected with the positive terminal of the filter circuit; the voltage detection input cathode is connected with the negative terminal of the filter circuit; the first output end is connected with the control end of the first switch; a first preset value is set on the voltage detection control circuit; the first switch is controlled to be switched on when the direct current input voltage is less than the first preset value, and the first switch is controlled to be switched off when the detected direct current input voltage is more than the first preset value. The filter circuit can provide proper filtering capacity for input voltages in different ranges, and is low in implementation cost and small in occupied space.

Description

technical field [0001] The invention relates to a rectifier filter circuit, in particular to a rectifier filter circuit with wide voltage input. Background technique [0002] Electronic circuits require DC power to provide energy. Although chemical batteries can be used as DC power in some cases, in most cases, DC power is obtained through conversion of AC power provided by the grid. [0003] There are many AC to DC circuits, and industrial and civil power supplies generally use AC power supply. figure 1 What is shown is the domestic alternating current that changes according to the sinusoidal law over time, which is called alternating sinusoidal voltage. The time required for one change is called the cycle of alternating voltage, which is represented by T. The 220V referred to in the industry refers to the effective value , whose peak value is Times the effective value, that is: [0004] 220 V × 2 = ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M1/14
Inventor 王保均
Owner MORNSUN GUANGZHOU SCI & TECH