Switching circuit and control method thereof
A switching circuit and circuit technology, applied in circuits, electrical switches, electronic switches, etc., can solve problems such as inability to effectively deal with DC power arcing, difficult to achieve universal AC and DC power, and inability to withstand AC power back pressure.
Inactive Publication Date: 2017-07-21
GUANGDONG MIDEA KITCHEN APPLIANCES MFG CO LTD +1
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Problems solved by technology
Switching circuits using semiconductor power electronic devices as switches can only be used for breaking DC power, but cannot withstand the back pressure of AC power; although switching circuits using mechanical relays as switches can withstand the back pressure of AC power, they cannot effectively Dealing with arcing when DC power is interrupted
Therefore, when it is necessary to be compatible with the two power supply modes of AC and DC power supply, the current switching circuit does not have the ability to deal with the interruption of AC power supply and DC power supply, so it is difficult to realize the universal power supply under AC and DC power supply.
Method used
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[0015] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.
[0016] Such as figure 1 As shown, the switch circuit according to an embodiment of the present invention includes an AC and DC detection circuit 10 , a controller 20 and a hybrid switch circuit 30 . The AC-DC detection circuit 10 is used to detect whether the power supply 40 is an AC power supply or a DC power supply; the controller 20 is used to control the on-off of the hybrid switch circuit 30 according to the detection result of the AC-DC detection circuit 10; and the hybrid switch The circuit 30 is configured to be turned on and off under the control of the controller 10 , and has the capability of connecting the AC power supply and the DC power supply to ...
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The present invention belongs to the electronic circuit field and discloses a switching circuit and a control method thereof. The switching circuit includes an alternating current / direct current detection circuit which is used for detecting whether a power source is an alternating current power source or a direct current power source, a controller which is used for controlling the on-off of a hybrid switching circuit according to the detection result of the alternating current / direct current detection circuit, and the hybrid switching circuit which is switched on and switched off under the control of the controller and can connect the alternating current power source and the direct current power source to a load. The switching circuit and the control method thereof of the invention can be commonly applied to alternating current / direct current power sources.
Description
[0001] This case is a divisional application of Chinese invention patent 201510390809.4 entitled "A Switching Circuit and Its Control Method" submitted on July 3, 2015. technical field [0002] The present invention relates to the field of electronic circuits, in particular to a switch circuit and a control method thereof. Background technique [0003] Current switching circuits are either implemented using semiconductor power electronics or mechanical relays. Switching circuits using semiconductor power electronic devices as switches can only be used for breaking DC power, but cannot withstand the back pressure of AC power; although switching circuits using mechanical relays as switches can withstand the back pressure of AC power, they cannot effectively Deals with arcing when DC power is interrupted. Therefore, when it is necessary to be compatible with the two power supply modes of AC and DC power supply, the current switching circuit does not have the ability to deal wi...
Claims
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IPC IPC(8): H02M1/10G01R19/175H01H9/54H03K17/51
CPCG01R19/175H01H9/547H01H9/548H02M1/10H03K17/51H03K2017/515
Inventor 郑年重史龙
Owner GUANGDONG MIDEA KITCHEN APPLIANCES MFG CO LTD