Power supply circuit of inverter power supply and household appliance having same
A technology of power supply circuit and inverter power supply, which is applied in the direction of electrical components, AC motor control, output power conversion device, etc., can solve the problems of high cost and waste of electric energy, and achieve the reduction of power-on impulse current, cost reduction, and guarantee reliability effect
Active Publication Date: 2015-11-04
GD MIDEA AIR-CONDITIONING EQUIP CO LTD +1
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- Application Information
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Problems solved by technology
However, when the power supply circuit is working normally, since the load current continues to flow through the relay contacts, it is necessary to use a relay with a larger capacity, which is costly and causes waste of electric energy
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[0022] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.
[0023] The following describes the power supply circuit of the inverter power supply provided by the embodiment of the present invention and the household appliance with the power supply circuit with reference to the accompanying drawings.
[0024] The following describes the power supply circuit of the inverter power supply provided by the embodiment of the present invention and the household appliance with the power supply circuit with reference to the accompanying drawings.
[0025] like Figure 1-Figure 3 As shown, the power...
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The invention discloses a power supply circuit of an inverter power supply and a household appliance having same. The power supply circuit comprises a power supply input module; a rectifier module; a first capacitor connected between a first output end and a second output end of the rectifier module; an inverter module; a discharge module which comprises a first diode, a first resistor and a second capacitor which are connected in series in sequence; a second resistor, of which one end is connected with a second node between the first resistor and the second capacitor, and the other end is connected with the second output end of the rectifier module; a third resistor connected between the second resistor and the rectifier module; a PTC, of which one end is connected with the other end of the second capacitor, and the other end is connected with one end of the third resistor; a second diode, of which the positive pole is connected with the second node, and the negative pole is connected with a first node between the first diode and the first resistor; a first switch connected in parallel with the PTC; and a controller for controlling the first switch. Therefore, the small-capacitance first capacitor can be adopted, and power-on surge current is reduced.
Description
technical field [0001] The 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] A smoothing filter capacitor is usually provided in the power supply circuit of the relevant inverter power supply, and the capacitance of the smoothing filter capacitor is gradually reduced with the advancement of technology. Moreover, in the related art, a relay is usually connected to the AC main loop of the power supply circuit, wherein the relay is closed after the circuit at the output end of the rectifier bridge reaches a stable state. However, when the power supply circuit is working normally, since the load current continues to flow through the relay contacts, it is necessary to use a relay with a larger capacity, which is costly and causes waste of electric energy. [0003] Therefore, related technologies need to be improve...
Claims
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IPC IPC(8): H02M1/32H02P27/06
Inventor 郑绪成
Owner GD MIDEA AIR-CONDITIONING EQUIP CO LTD