Power supply circuit of inverter power supply and household appliances having same
A technology of power supply circuit and inverter power supply, applied in the field of power electronics, can solve problems such as voltage fluctuations becoming larger, exceeding the withstand voltage value of power devices, etc., to achieve the effects of suppressing surge voltage, improving power factor, and absorbing surge energy
Active Publication Date: 2018-06-01
GD MIDEA AIR-CONDITIONING EQUIP CO LTD +1
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However, as the capacitance value decreases, the voltage fluctuation on the smoothing filter capacitor becomes larger, especially for motor loads that are prone to out-of-step risks, and the voltage on the smoothing filter capacitor will suddenly rise to a relatively high level, exceeding the endurance of the power device. pressure value
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[0027] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings, in which the same or similar reference numerals indicate the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary, and are intended to explain the present invention, but should not be construed as limiting the present invention.
[0028] The following describes the power supply circuit of the inverter power supply proposed in the embodiments of the present invention and the household appliance having the power supply circuit with reference to the accompanying drawings.
[0029] figure 1 It is a schematic diagram of a power supply circuit of an inverter power supply according to an embodiment of the present invention. Such as figure 1 As shown, the power supply circuit of the inverter power supply includes: a motor 10, a power inp...
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The invention discloses a power supply circuit for inverter power sources and a home appliance with the same. The power supply circuit comprises a motor, a power input module connected with a power source, a rectifier module connected with the power input module and having a first output end and a second output end, a first capacitor connected between the first output end and the second output end of the rectifier module, a discharge module connected in parallel with the first capacitor and including a first resistor and a second capacitor which are connected in series, an inverter module connected with the first output end and the second output end of the rectifier module and used for controlling the motor, an acquisition module used for acquiring the voltage of the first capacitor, a brake signal generation module used for generating a brake signal according to the voltage of the first capacitor, and a control module used for controlling brake of the motor according to the brake signal in order to implement protection through brake control in the case of overvoltage and ensure that the voltage of the first capacitor fluctuates in a preset range.
Description
Technical field [0001] The present invention relates to the technical field of power electronics, in particular to a power supply circuit of an inverter power supply and a household appliance with the power supply circuit. Background technique [0002] With the advancement of technology, the capacitance of the smoothing filter capacitor of the inverter power supply is gradually decreasing. However, as the capacitance value decreases, the voltage fluctuation on the smoothing filter capacitor becomes larger, especially for the risk of the motor load prone to out-of-step, the voltage on the smoothing filter capacitor will instantly rush to a relatively high level, exceeding the endurance of the power device. Pressure value. [0003] Therefore, there is a need for improvement in related technologies. Summary of the invention [0004] The present invention aims to solve one of the technical problems in the related art at least to a certain extent. To this end, an object of the present...
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IPC IPC(8): H02M1/32H02M1/14H02M1/42
CPCY02B70/10
Inventor 郑绪成张国柱
Owner GD MIDEA AIR-CONDITIONING EQUIP CO LTD