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Switching power supply circuit with wide voltage input and variable frequency household appliances

A technology of switching power supply circuit and wide voltage input, which is applied in the direction of converting AC power input into DC power output, output power conversion device, excitation or armature current control, etc., and can solve the problems of motor drive modules that cannot work normally and are easy to burn out Problems such as circuit components and poor versatility

Inactive Publication Date: 2018-09-25
SUZHOU SAMSUNG ELECTRONICS CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

but if yes figure 1 For the 220V voltage input shown, if the switching power supply circuit of the frequency conversion home appliance is connected to 110V AC, the voltage of the motor drive module will be too low and cannot work normally; figure 2 For the 110V voltage input shown, the switching power supply circuit of the frequency conversion home appliance is connected with 220V AC, and the output voltage value of 220V after rectification and filtering reaches more than 600V, while the upper limit of the bus voltage of the motor drive module is usually below 500V, so it is easy to burn out the motor drive. Module Circuit Components
[0005] From the above it can be seen that figure 1 The circuit shown and figure 2 The circuits shown can only guarantee the normal operation of the motor drive module for one voltage input, and the versatility is poor

Method used

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  • Switching power supply circuit with wide voltage input and variable frequency household appliances
  • Switching power supply circuit with wide voltage input and variable frequency household appliances
  • Switching power supply circuit with wide voltage input and variable frequency household appliances

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] See image 3 , which shows a schematic diagram of a switching power supply circuit with wide voltage input provided by the present application. The switching power supply circuit with wide voltage input includes: a DC voltage output circuit 31, a first switching power supply circuit SMPS1, a main control chip 32, a second A relay RY1, a second relay RY2, a rectifier bridge BD1, a first capacitor C1, a second capacitor C2, a first resistor R1 and a second resistor R2. It should be noted, image 3 V in s Indicates the voltage of the grid.

[0053] The first input terminal of the DC voltage output circuit 31 is connected to the live line L of the grid, the second input terminal of the DC voltage output circuit 31 is connected to the neutral line N of the grid, and the first input terminal of the DC voltage output circuit 31 One output terminal is connected to the main control chip 32, the second output terminal of the DC voltage output circuit 31 is connected to the fir...

Embodiment 2

[0077] In this example, in image 3 On the basis of the wide voltage input switching power supply circuit shown, another wide voltage input switching power supply circuit is expanded, such as Figure 5 shown in image 3 On the basis of the shown switching power supply circuit with wide voltage input, it further includes: a second switching power supply circuit SMPS2.

[0078] The input terminal of the second switching power supply circuit SMPS2 is connected to the first terminal of R1 of the first resistor, and the output terminal of the second switching power supply circuit SMPS2 is connected to the control chip of the motor driving module corresponding to the motor driving module.

[0079]In this embodiment, the first end of the first resistor R1 is connected to the input end of the second switching power supply circuit SMPS2, therefore, the preset voltage value is output to the second switching power supply circuit SMPS2 through the first end of the first resistor R1 , th...

Embodiment 3

[0098] In this embodiment, a frequency conversion household appliance provided by this application is shown, please refer to Figure 10 , Figure 10 A schematic diagram of a logic structure of an inverter household appliance provided in this application is shown. The inverter appliance includes: a switching power supply circuit 101 with wide voltage input and a motor drive module 102 .

[0099] The specific structure of the switching power supply circuit 101 with wide voltage input is the same as the switching power supply circuit with wide voltage input shown in Embodiment 1 and Embodiment 2, and will not be repeated here.

[0100] The motor driving module 102 is the same as the motor driving modules mentioned in Embodiment 1 and Embodiment 2, and will not be repeated here.

[0101] In this embodiment, the switching power supply circuit 101 with wide voltage input outputs a preset voltage value to the motor driving module 102 .

[0102] In this embodiment, the inverter hous...

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Abstract

The invention provides a switching power circuit with wide voltage input and a variable-frequency home appliance. The switching power circuit with wide voltage input comprises a direct voltage output circuit, a first switching power circuit, a master control chip, a first relay, a second relay, a rectifier bridge, a first capacitor, a second capacitor, a first resistor, and a second resistor. According to the invention, the first relay and the second relay are controlled differently based on different voltage values of a power grid obtained through calculation, so different circuits composed of the rectifier bridge, the first voltage, the second voltage, the first capacitor and the second capacitor are obtained, the same preset voltage value is output under different input voltage values of the power grid, and the universality of the switching power circuit with wide voltage input is improved.

Description

technical field [0001] The present application relates to the technical field of power electronics, in particular to a switching power supply circuit with wide voltage input and variable frequency home appliances. Background technique [0002] At present, although the power supply voltage of household grids varies greatly from country to country, the voltage of household grids is usually classified into two categories of nominal values: 110V and 220V. [0003] Different power grid voltages have brought great difficulties to the design of switching power supply circuits for household appliances, especially for variable frequency home appliances. At present, due to the limitation of the bus voltage of the motor drive module, the switching power supply circuits of variable frequency home appliances are designed for two voltage inputs of 220V and 110V. , only two circuit schemes can be adopted, see figure 1 with figure 2 . figure 1 Shown is the schematic diagram of the switc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M7/219H02P7/28
Inventor 马金宝
Owner SUZHOU SAMSUNG ELECTRONICS CO LTD