CN114123104A - Voltage input device and power supply method - Google Patents
Voltage input device and power supply method Download PDFInfo
- Publication number
- CN114123104A CN114123104A CN202010882919.3A CN202010882919A CN114123104A CN 114123104 A CN114123104 A CN 114123104A CN 202010882919 A CN202010882919 A CN 202010882919A CN 114123104 A CN114123104 A CN 114123104A
- Authority
- CN
- China
- Prior art keywords
- voltage
- circuit
- switch
- coupled
- input circuit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 21
- 238000001514 detection method Methods 0.000 claims abstract description 58
- 230000008878 coupling Effects 0.000 claims abstract description 22
- 238000010168 coupling process Methods 0.000 claims abstract description 22
- 238000005859 coupling reaction Methods 0.000 claims abstract description 22
- 230000002159 abnormal effect Effects 0.000 claims description 9
- 230000005540 biological transmission Effects 0.000 description 13
- 238000010586 diagram Methods 0.000 description 4
- 230000005856 abnormality Effects 0.000 description 3
- 238000013459 approach Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/20—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess voltage
Landscapes
- Direct Current Feeding And Distribution (AREA)
Abstract
A voltage input device and a power supply method are provided, wherein the voltage input device comprises an input circuit, an output circuit, a switch and a voltage detection circuit. The input circuit is coupled to the DC power source terminal and receives a first voltage signal when the input circuit is coupled to the DC power source terminal. The output circuit is coupled to the device and is used for transmitting a second voltage signal to the device according to the first voltage signal when the output circuit is coupled to the input circuit. The switch is used for coupling the input circuit with the output circuit when the switch is switched on and disconnecting the input circuit and the output circuit when the switch is switched off. The voltage detection circuit is used for detecting the voltage value of the first voltage signal when the direct current power supply end is coupled with the input circuit, and turning on or turning off the switch according to the voltage value. Therefore, the voltage input device can avoid surge current generated when a direct current power supply end with an over-high voltage value is coupled with the equipment.
Description
Technical Field
The present invention relates to a voltage signal input technology, and more particularly, to a voltage input device and a power supply method.
Background
Generally, a user may not notice the sequence of coupling the power transmission device (e.g., a power line) to the electronic device and the power supply (e.g., a socket) when operating the electronic device. For example, a user may first plug an Alternating Current (AC) power terminal (e.g., a plug) of the power transmission device into a socket, and then couple a Direct Current (DC) power terminal of the power transmission device to the electronic device. However, the ac power source of the power transmission device is coupled to the power supply, and then the dc power source is coupled to the electronic device to be driven, so that an Inrush current (Inrush current) is generated. Inrush currents are likely to cause damage to internal components of electronic equipment. Therefore, how to develop a related art capable of overcoming the above problems is an important issue in the art.
Disclosure of Invention
An embodiment of the invention discloses a voltage input device, which includes an input circuit, an output circuit, a switch and a voltage detection circuit. The input circuit is coupled to the DC power source terminal and receives a first voltage signal when the input circuit is coupled to the DC power source terminal. The output circuit is coupled to the device and is used for transmitting a second voltage signal to the device according to the first voltage signal when the output circuit is coupled to the input circuit. The switch is used for coupling the input circuit with the output circuit when the switch is switched on and disconnecting the input circuit and the output circuit when the switch is switched off. The voltage detection circuit is used for detecting the voltage value of the first voltage signal when the direct current power supply end is coupled with the input circuit, and turning on or turning off the switch according to the voltage value.
In some embodiments, the voltage input device further includes a switch detection circuit for detecting a coupling condition of the input circuit and the dc power source terminal and disconnecting the input circuit from the output circuit when the coupling condition is abnormal.
In some embodiments, the switch detection circuit is further configured to detect whether a power switch of the apparatus is turned on, and to disconnect the input circuit from the output circuit when the power switch is turned on and the input circuit is disconnected from the dc power source terminal.
In some embodiments, the voltage detection circuit is further configured to turn off the switch when the input circuit is coupled to the dc power source and the voltage value of the first voltage signal is higher than a predetermined voltage value.
In some embodiments, the voltage detection circuit is further configured to turn on the switch after the switch is turned off and when the voltage value of the first voltage signal is less than or equal to a predetermined voltage value, and to continuously turn on the switch after the switch is turned on and when the voltage value is higher than the predetermined voltage value.
In some embodiments, the voltage detection circuit is further configured to turn on the switch when the input circuit is coupled to the dc power source and the voltage value of the first voltage signal is less than or equal to the predetermined voltage value.
Another embodiment of the present invention discloses a power supply method, including: coupling a direct current power supply end to an input circuit; detecting a voltage value before the DC power source is coupled to the input circuit; when the voltage value is less than or equal to a preset voltage value, the input circuit is coupled to an output circuit; when the input circuit is coupled with the output circuit, power is supplied to equipment through the output circuit according to a voltage signal of the direct current power supply end.
In some embodiments, the power supply method further comprises: detecting whether a power switch of the equipment is conducted or not; when the power switch is turned on and the input circuit is electrically disconnected from the DC power supply end, the input circuit and the output circuit are disconnected.
In some embodiments, the power supply method further comprises: when the voltage value is higher than the preset voltage value and the direct current power supply end is coupled with the input circuit, the input circuit and the output circuit are disconnected.
In some embodiments, the power supply method further comprises: after the direct current power supply end is coupled with the input circuit and the voltage value is smaller than the preset voltage value, the input circuit is coupled with the output circuit; after the direct current power supply end is coupled with the input circuit and the voltage value is higher than the preset voltage value, the direct current power supply end is continuously coupled with the input circuit and the output circuit.
Drawings
Fig. 1 is a functional block diagram of a voltage input device, a power transmission device and an apparatus according to an embodiment of the disclosure;
FIG. 2 is a functional block diagram of the voltage input device shown in FIG. 1 according to an embodiment of the disclosure;
fig. 3 is a flowchart illustrating a power supply method according to an embodiment of the disclosure.
[ notation ] to show
110 power transmission device
120 equipment
112 AC power supply terminal
114 dc power supply terminal
190 power supply
DS1 DC Voltage Signal
122 voltage input device
124 power switch
S1-S5 voltage signal
VDS1 Voltage value
VPD preset voltage value
202 input circuit
204 switch detection circuit
206 switch
208 voltage detection circuit
210 output circuit
300 power supply method
302. 304, 306, 312, 322, 324, 332, 334
Detailed Description
When an element is referred to as being "connected" or "coupled," it can be referred to as being "electrically connected" or "electrically coupled. "connected" or "coupled" may also be used to indicate that two or more elements are in mutual engagement or interaction. Moreover, although terms such as "first," "second," …, etc., may be used herein to describe various elements, these terms are used merely to distinguish one element or operation from another element or operation described in similar technical terms. Unless the context clearly dictates otherwise, the terms do not specifically refer or imply an order or sequence nor are they intended to limit the invention.
Unless defined otherwise, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and the present invention and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms, including "at least one", unless the content clearly indicates otherwise. "or" means "and/or". As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, regions, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, regions integers, steps, operations, elements, components, and/or groups thereof.
Embodiments of the present invention will now be described with reference to the accompanying drawings, and for the purposes of explanation, numerous implementation details will be set forth in the description below. It should be understood, however, that these implementation details are not to be taken in a limiting sense. That is, in some embodiments of the disclosure, such implementation details are not necessary. In addition, for the sake of simplicity, some conventional structures and elements are shown in the drawings in a simple schematic manner.
Fig. 1 is a functional block diagram of a voltage input device, a power transmission device and an apparatus according to an embodiment of the disclosure. As shown in fig. 1, the apparatus 120 is coupled to a voltage input device 122. The power transmission device 110 is used for receiving a voltage from the power supply 190 and transmitting the voltage to the apparatus 120 through the voltage input device 122, so that the apparatus 120 can operate according to the transmitted voltage.
As shown in fig. 1, the power transmission device 110 includes an Alternating Current (AC) power terminal 112 and a Direct Current (DC) power terminal 114.
In some embodiments, the ac power source 112 is configured to couple to the power supply 190 and convert an ac voltage provided by the power supply 190 into a dc voltage signal DS 1. In some embodiments, the ac power source 112 includes a plug and/or an adapter. In some embodiments, the power supply 190 includes an electrical outlet.
In some embodiments, the dc power supply terminal 114 is coupled to the voltage input device 122. When the dc power source 114 is coupled to the voltage input device 122, the dc power source 114 is configured to transmit a dc voltage signal DS1 to the voltage input device 122, so that the voltage input device 122 transmits power from the power supply 190 to the apparatus 120. In some embodiments, the dc power terminal 114 includes wires and/or adapters for coupling to the voltage input device 122.
In some embodiments, the voltage input device 122 is configured to receive the dc voltage signal DS1 from the dc power source 114 and transmit the voltage signal S5 to the equipment 120 according to the dc voltage signal DS1, so that the power supply 190 can supply power to the equipment 120 through the power transmission device 110 and the voltage input device 122.
In some embodiments, the voltage input device 122 is further configured to detect the voltage VDS1 of the dc power supply terminal 114. In some embodiments, the voltage VDS1 is a voltage value of the dc power supply terminal 114 when the dc power supply terminal 114 is coupled to the voltage input device 122. In some other embodiments, the voltage VDS1 is the voltage that the dc power supply terminal 114 has before the dc power supply terminal 114 is coupled to the voltage input device 122.
In some embodiments, the voltage input device 122 is configured to disconnect the dc power supply terminal 114 from the equipment 120 when the voltage VDS1 is higher than the predetermined voltage VPD. When the voltage VDS1 is lower than or equal to the preset voltage VPD, the voltage input device 122 is configured to couple the dc power terminal 114 and the device 120, so that the power supply 190 supplies power to the device 120 through the dc power terminal 114 and the voltage input device 122. In some embodiments, the predetermined voltage value VPD is zero volts.
For example, when the voltage value VDS1 is higher than the preset voltage value VPD, the voltage input device 122 disconnects the dc power terminal 114 from the apparatus 120, so that the dc voltage signal DS1 does not affect the apparatus 120. On the contrary, when the voltage VDS1 is lower than or equal to the preset voltage VPD, the dc power terminal 114 and the apparatus 120 are coupled to each other through the voltage input device 122, and the voltage input device 122 transmits the voltage signal S5 to the apparatus 120 according to the dc voltage signal DS1, so that the apparatus 120 is powered.
In some previous approaches, in the case that the dc power source terminal has a voltage higher than a predetermined voltage value, when the dc power source terminal is coupled to a device, an Inrush current (Inrush current) is generated. Inrush current input devices can cause damage to the components inside the device.
Compared with the above-mentioned method, in the embodiment of the present invention, the voltage input device 122 monitors the voltage VDS1 of the dc power terminal 114, and the voltage input device 122 disconnects the dc power terminal 114 from the device 120 when the voltage VDS1 is too high, so as to prevent the device 120 from being damaged due to the inrush current input into the device 120.
In some embodiments, no inrush current is generated even if the dc voltage signal DS1 is pulled up to a voltage higher than the preset voltage value VPD after the dc power terminal 114 is coupled to the device 120. Therefore, in some embodiments, after the dc power source terminal 114 is coupled to the device 120 and the voltage VDS1 is higher than the preset voltage value VPD, the voltage input device 122 is further configured to continuously maintain the coupling state of the dc power source terminal 114 and the device 120, so that the device 120 is powered according to the voltage VDS1 higher than the preset voltage value VPD. The following is a detailed description of an exemplary embodiment.
For example, the ac power source terminal 112 is coupled to the power supply 190. At this time, the voltage VDS1 of the dc power supply terminal 114 is higher than the preset voltage VPD. The dc power terminal 114 is coupled to the voltage input device 122. At this time, the voltage input device 122 detects that the voltage VDS1 is higher than the predetermined voltage VPD, and disconnects the dc power source terminal 114 from the apparatus 120. Then, the ac power terminal 112 is disconnected from the power supply 190 (e.g., the user pulls the plug of the ac power terminal 112 out of the socket of the power supply 190). At this time, the voltage VDS1 of the dc power terminal 114 is less than or equal to the preset voltage VPD. The voltage input device 122 detects that the voltage VDS1 is less than or equal to the predetermined voltage VPD, and is coupled to the dc power source terminal 114 and the apparatus 120. Then, the ac power terminal 112 is coupled to the power supply 190 again (for example, the user plugs the plug of the ac power terminal 112 into the socket of the power supply 190). At this time, the voltage VDS1 of the dc power terminal 114 is higher than the predetermined voltage VPD, and the voltage input device 122 continuously maintains the coupling state of the dc power terminal 114 and the device 120.
In this way, in the above example, even when the voltage VDS1 is pulled to be higher than the predetermined voltage VPD, the voltage input device 122 still maintains the coupling state of the dc power source terminal 114 and the device 120, so that the power supply 190 supplies power to the device 120 through the dc voltage signal DS1 having the voltage VDS1 higher than the predetermined voltage VPD.
In some embodiments, power switch 124 is a power switch of device 120. When the power switch 124 is on, the device 120 is turned on, and when the power switch 124 is off, the device 120 is turned off. In a further embodiment, the normal state of the power switch 124 is off when the voltage input device 122 of the coupling apparatus 120 is not coupled to the dc power terminal 114.
However, in some cases, when the voltage input device 122 is not coupled to the dc power source 114, the power switch 124 is turned on, which may cause an abnormality of the apparatus 120. Therefore, in order to solve the above problem, in the present embodiment, when the voltage input device 122 is not coupled to the dc power terminal 114 and the power switch 124 is turned on, the voltage input device 122 is configured to disconnect the dc power terminal 114 from the equipment 120, so as to avoid an abnormality of the equipment 120.
Fig. 2 is a functional block diagram of the voltage input device shown in fig. 1 according to an embodiment of the disclosure. As shown in fig. 2, the voltage input device 122 includes an input circuit 202, a switch detection circuit 204, a switch 206, a voltage detection circuit 208, and an output circuit 210. The switch detection circuit 204, the switch 206 and the voltage detection circuit 208 are coupled in series between the input circuit 202 and the output circuit 210, but the embodiment of the invention is not limited thereto.
In some embodiments, when the switch detection circuit 204, the switch 206 and the voltage detection circuit 208 are all turned on, the input circuit 202 is coupled to the output circuit 210 through the switch detection circuit 204, the switch 206 and the voltage detection circuit 208. In other words, when the input circuit 202 is coupled to the output circuit 210, the voltage input device 122 converts the received dc voltage signal DS1 into the voltage signal S5 through the input circuit 202, the switch detection circuit 204, the switch 206, the voltage detection circuit 208 and the output circuit 210, and transmits the voltage signal S5 to the apparatus 120 to power the apparatus 120. On the contrary, when the input circuit 202 is disconnected from the output circuit 210, the device 120 does not receive the voltage signal S5, in other words, the device 120 is not powered through the voltage input device 122.
In some embodiments, the input circuit 202 is coupled to the dc power terminal 114 to receive the dc voltage signal DS1, and transmits the voltage signal S1 to the switch detection circuit 204 according to the dc voltage signal DS 1.
In some embodiments, the switch detection circuit 204 is configured to detect a coupling condition between the input circuit 202 and the dc power source terminal 114, and transmit the voltage signal S2 to the switch 206 according to the voltage signal S1 when the input circuit 202 is normally coupled to the dc power source terminal 114. In some embodiments, the switch detection circuit 204 does not transmit the voltage signal S2 to the switch 206 when the dc power terminal 114 and the input circuit 202 are coupled abnormally (e.g., poor contact). In some other embodiments, when the dc power terminal 114 is abnormally coupled to the input circuit 202, the switch detection circuit 204 is configured to turn off the switch 206, so that the input circuit 202 is disconnected from the output circuit 210, thereby preventing the signal S5 from being transmitted to the apparatus 120 in case of an abnormality of the voltage input device 122.
In some embodiments, the switch detection circuit 204 is further configured to detect whether the power switch 124 of the apparatus 120 is abnormal, and disconnect the input circuit 202 and the output circuit 210 when the power switch 124 is abnormal.
For example, in some embodiments, the normal state of the power switch 124 is off when the voltage input device 122 of the coupling apparatus 120 is not coupled to the dc power source 114. Therefore, when the input circuit 202 is not coupled to the dc power source 114 and the power switch 124 is turned on, the switch detection circuit 204 can determine that the power switch 124 is abnormal. In some embodiments, when the power switch 124 is abnormal, the switch detection circuit 204 is configured to turn off the switch 206, so that the input circuit 202 and the output circuit 210 are disconnected, and no voltage signal S5 is generated and transmitted to the abnormal device 120, so as to avoid further affecting the device 120.
In some embodiments, the switch 206 is configured to be turned on or off by the switch detection circuit 204 and/or the voltage detection circuit 208. In some embodiments, the input circuit 202 is coupled to the output circuit 210 when the switch 206 is turned on, and the input circuit 202 is disconnected from the output circuit 210 when the switch 206 is turned off. In some embodiments, when the switch 206 is turned on, the voltage signal S3 is transmitted to the voltage detection circuit 208 through the switch 206 according to the voltage signal S2. In some embodiments, the voltage signal S3 is substantially equivalent to the voltage signal S2. In some embodiments, the switch 206 is a relay switch or other type of switch.
In some embodiments, the voltage detection circuit 208 is configured to detect a voltage value VDS1 of the dc voltage signal DS1 and turn on or off the switch 206 according to the voltage value VDS 1. In some embodiments, the voltage VDS1 is a voltage value that the dc power supply 114 has when coupled to the input circuit 202. In some embodiments, the voltage VDS1 is a voltage value that the dc power supply terminal 114 has before being coupled to the input circuit 202.
In some embodiments, the voltage detection circuit 208 is configured to turn off the switch 206 to disconnect the input circuit 202 and the output circuit 210 when the voltage VDS1 is higher than the predetermined voltage VPD. When the voltage VDS1 is lower than or equal to the predetermined voltage VPD, the voltage detection circuit 208 is configured to turn on the switch 206 to couple the input circuit 202 and the output circuit 210, so that the apparatus 120 is powered through the voltage input device 122.
In some embodiments, after the dc power source 114 is coupled to the input circuit 202 and the voltage VDS1 is higher than the predetermined voltage VPD, the voltage detection circuit 208 is configured to continuously turn on the switch 206, so that the input circuit 202 is continuously coupled to the output circuit 210. In this way, the voltage input device 122 enables the apparatus 120 to be continuously powered according to the voltage value VDS1 higher than the preset voltage value VPD. The following is a detailed description of an exemplary embodiment.
For example, first, the ac power terminal 112 is disconnected from the power supply 190, so that the voltage VDS1 of the dc power terminal 114 is lower than the preset voltage VPD. The dc power terminal 114 is coupled to the input circuit 202. At this time, the voltage detection circuit 208 detects that the voltage VDS1 is lower than the predetermined voltage VPD, and turns on the switch 206. Then, the ac power source 112 is coupled to the power supply 190, so that the voltage VDS1 of the dc power source 114 is raised to be higher than the predetermined voltage VPD. At this time, the voltage detection circuit 208 continuously turns on the switch 206 to continuously couple the input circuit 202 and the output circuit 210, so that the device 120 is powered according to the voltage value VDS1 higher than the preset voltage value VPD.
In some embodiments, after the switch 206 is turned off and the voltage VDS1 is lower than the predetermined voltage VPD, the voltage detection circuit 208 turns on the switch 206 to couple the input circuit 202 and the output circuit 210. Therefore, after the ac power source 112 disconnects the power supply 190, the ac power source 112 and the power supply 190 are re-coupled, and the device 120 can be powered through the voltage input device 122. The following is a detailed description of an exemplary embodiment.
For example, the ac power terminal 112 is first coupled to the power supply 190 (e.g., the plug of the ac power terminal 112 is plugged into the socket of the power supply 190), so that the voltage VDS1 of the dc power terminal 114 is higher than the predetermined voltage VPD. Then, when the dc power terminal 114 is coupled to the input circuit 202, the voltage detecting circuit 208 detects that the voltage VDS1 is higher than the predetermined voltage VPD, and turns off the switch 206. At this time, the input circuit 202 is disconnected from the output circuit 210. Then, after the dc power supply terminal 114 is coupled to the input circuit 202, the ac power supply terminal 112 is disconnected from the power supply 190 (for example, the plug of the ac power supply terminal 112 is unplugged from the socket of the power supply 190), so that the voltage VDS1 is lowered to be lower than the preset voltage VPD. At this time, the voltage detection circuit 208 detects that the voltage VDS1 is lower than or equal to the predetermined voltage VPD, so the voltage detection circuit 208 turns on the switch 206. At this time, the input circuit 202 is coupled to the output circuit 210. Then, the ac power terminal 112 is coupled to the power supply 190 again (for example, the plug of the ac power terminal 112 is plugged into the socket of the power supply 190), so that the voltage VDS1 is raised to be higher than the predetermined voltage VPD. At this time, the voltage detection circuit 208 continuously turns on the switch 206 to continuously couple the input circuit 202 and the output circuit 210, so that the device 120 is powered according to the voltage value VDS1 higher than the preset voltage value VPD.
In some embodiments, the voltage detection circuit 208 is configured to transmit the voltage signal S4 to the output circuit 210 according to the voltage signal S3 when the switch 206 is turned on. In some embodiments, the voltage level of the voltage signal S4 is substantially equal to the voltage level VDS1 of the dc power supply terminal 114 when the switch 206 is turned on.
As described above, in some embodiments, the voltage detection circuit 208 is configured to ensure that the voltage VDS1 is lower than or equal to the predetermined voltage VPD when the input circuit 202 is coupled to the dc power source 114, so as to reduce the inrush current caused by the voltage VDS1 being too high. Since the input circuit 202 is coupled to the dc power supply terminal 114, surge current is not generated even if the voltage VDS1 is raised. Therefore, in some embodiments, after the input circuit 202 is coupled to the dc power source 114, the voltage detecting circuit 208 is configured to maintain the coupling state of the input circuit 202 and the output circuit 210, so that the device 120 is powered according to the voltage value VDS1 higher than the preset voltage value VPD.
In some embodiments, the output circuit 210 is configured to transmit the voltage signal S5 to the apparatus 120 according to the voltage signal S4. In some embodiments, when the input circuit 202 is coupled to the output circuit 210, the voltage VDS1 of the DC voltage signal DS1 is substantially equal to the voltage values of the voltage signals S1S 5.
In the embodiment of the present invention, the arrangement of the input circuit 202, the switch detection circuit 204, the switch 206, the voltage detection circuit 208 and the output circuit 210 is not limited to the above-mentioned embodiments. Other configurations of the input circuit 202, the switch detection circuit 204, the switch 206, the voltage detection circuit 208, and the output circuit 210 are also within the scope of the present disclosure.
Fig. 3 is a flowchart illustrating a power supply method according to an embodiment of the disclosure. As shown in fig. 3, the power supply method 300 includes operations 302, 304, 306, 312, 322, 324, 332, and 334. In some embodiments, the power supply method shown in fig. 3 is applied to the power input device 122, the power transmission device 110 and the apparatus 120 shown in fig. 2 and/or fig. 1.
For illustrative purposes, the following description of the power supply method 300 uses the voltage input device 122, the power transmission device 110, and the apparatus 120 described in fig. 1 and fig. 2 as an example, but the embodiment of the invention is not limited thereto.
As shown in fig. 3, the power supply method 300 begins with operation 302. After operation 302, operation 304 is performed. At operation 304, the dc power supply terminal 114 is coupled to the input circuit 202. After operation 304, operation 306 is performed. In operation 306, the voltage detecting circuit 208 detects the voltage VDS1 of the dc power source terminal 114 and compares the voltage VDS1 with the predetermined voltage VPD. After the operation 304, the operation 312 or the operation 322 is performed according to the comparison result between the voltage VDS1 and the preset voltage VPD.
As shown in fig. 3, if the voltage VDS1 is lower than or equal to the predetermined voltage VPD, operation 312 is performed. At operation 312, the switch detection circuit 204 detects the coupling condition between the input circuit 202 and the dc power source terminal 114. If the dc power source terminal 114 is normally coupled to the input circuit 202, the switch detection circuit 204 is coupled to the input circuit 202 and the output circuit 210, so that the power supply 190 supplies power to the apparatus 120 through the voltage input device 122. On the contrary, in some embodiments, if the coupling condition between the dc power source terminal 114 and the input circuit 202 is abnormal, the switch detection circuit 204 disconnects the input circuit 202 from the output circuit 210 to prevent the dc voltage signal DS1 from being transmitted through the abnormal coupling.
As shown in fig. 3, if the voltage VDS1 is higher than the predetermined voltage VPD, operation 322 is performed. At operation 322, the voltage detection circuit 208 turns off the switch 206 to disconnect the input circuit 202 from the output circuit 210. Following operation 322, operation 324 is performed.
In operation 324, the ac power supply terminal 112 is disconnected from the power supply 190, so that the voltage value VDS1 is reduced to be lower than or equal to the preset voltage value VPD. At this time, the voltage detection circuit 208 turns on the switch 206 to couple the input circuit 202 and the output circuit 210.
After operation 312 or operation 324, operation 332 is performed. At operation 332, the ac power source 112 is coupled to the power supply 190. At this time, the voltage VDS1 of the dc power terminal 114 is raised to be higher than the predetermined voltage VPD, and the input circuit 202 and the output circuit 210 are continuously coupled to each other. In this way, the dc voltage signal DS1 is converted into the voltage signal S5 by the voltage input device 122 to power the device 120 according to the voltage VDS1 higher than the preset voltage VPD.
As shown in fig. 3, the power supply method 300 ends at operation 334, which follows operation 332. At this time, the voltage input device 122 transmits the voltage signal S5 to the apparatus 120 according to the dc voltage signal DS1, so that the power supply 190 continuously supplies power to the apparatus 120 through the power transmission device 110 and the voltage input device 122.
In summary, in the embodiment of the invention, the voltage input device 122 monitors the voltage VDS1 of the dc power source terminal 114, and disconnects the dc power source terminal 114 from the device 120 when the voltage VDS1 is too high. Thus, the inrush current generated by the excessive voltage VDS1 can be prevented from being inputted into the device 120, so as to reduce the consumption of the devices of the device 120. In some embodiments, the voltage input device 122 is further configured to disconnect the dc power terminal 114 from the device 120 when the power switch 124 of the device 120 is abnormally turned on, for example, when the device 120 is not coupled to the dc power terminal 114 and the power switch 124 is turned on, so as to prevent the voltage signal S5 from being input into the device 120 and further affecting the device 120. In addition, in some embodiments, the voltage value of the voltage signal S5 takes less time to rise from being less than or equal to the predetermined voltage value VPD to being higher than the predetermined voltage value VPD, as compared to some previous approaches.
Although the present invention has been described with reference to the above embodiments, it should be understood that various changes and modifications can be made therein by those skilled in the art without departing from the spirit and scope of the invention.
Claims (10)
1. A voltage input device, comprising:
an input circuit, for coupling with a DC power source end, and for receiving a first voltage signal when the input circuit is coupled with the DC power source end;
an output circuit coupled to a device and configured to transmit a second voltage signal to the device according to the first voltage signal when the output circuit is coupled to the input circuit;
a switch for coupling the input circuit to the output circuit when conducting and for disconnecting the input circuit from the output circuit when switching off; and
a voltage detection circuit for detecting the first voltage signal when the dc power source terminal is coupled to the input circuit, and turning on or off the switch according to the first voltage signal.
2. The voltage input device of claim 1, further comprising:
a switch detection circuit for detecting a coupling condition of the input circuit and the DC power supply terminal and for disconnecting the input circuit and the output circuit when the coupling condition is abnormal.
3. The voltage input device of claim 2, wherein the switch detection circuit is further configured to detect whether a power switch of the apparatus is turned on, and to disconnect the input circuit from the output circuit when the power switch is turned on and the input circuit is disconnected from the DC power source.
4. The voltage input device of claim 1, wherein the voltage detection circuit is further configured to turn off the switch when a voltage level of the first voltage signal is higher than a predetermined voltage level before the input circuit is coupled to the dc power source terminal.
5. The voltage input device of claim 1, wherein the voltage detection circuit is further configured to turn on the switch after the switch is turned off and when a voltage value of the first voltage signal is less than or equal to a predetermined voltage value, and to continuously turn on the switch after the switch is turned on and when the voltage value is higher than the predetermined voltage value.
6. The voltage input device of claim 1, wherein the voltage detection circuit is further configured to turn on the switch when the input circuit is coupled to the dc power source and a voltage value of the first voltage signal is less than or equal to a predetermined voltage value.
7. A method of supplying power, comprising:
coupling a direct current power supply end to an input circuit;
detecting a voltage value before the DC power source is coupled to the input circuit;
when the voltage value is less than or equal to a preset voltage value, the input circuit is coupled to an output circuit; and
when the input circuit is coupled with the output circuit, power is supplied to equipment through the output circuit according to a voltage signal of the direct current power supply end.
8. The power supply method according to claim 7, further comprising:
detecting whether a power switch of the equipment is conducted; and
when the power switch is turned on and the input circuit is electrically disconnected from the DC power source, the input circuit and the output circuit are disconnected.
9. The power supply method according to claim 7, further comprising:
and when the voltage value is higher than the preset voltage value and the direct current power supply end is coupled with the input circuit, disconnecting the input circuit and the output circuit.
10. The power supply method according to claim 7, further comprising:
when the direct current power supply end is coupled with the input circuit and the voltage value is smaller than the preset voltage value, the direct current power supply end is coupled with the input circuit and the output circuit; and
and when the voltage value is higher than the preset voltage value after the direct current power supply end is coupled with the input circuit, the direct current power supply end is continuously coupled with the input circuit to the output circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010882919.3A CN114123104A (en) | 2020-08-28 | 2020-08-28 | Voltage input device and power supply method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010882919.3A CN114123104A (en) | 2020-08-28 | 2020-08-28 | Voltage input device and power supply method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114123104A true CN114123104A (en) | 2022-03-01 |
Family
ID=80374687
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010882919.3A Pending CN114123104A (en) | 2020-08-28 | 2020-08-28 | Voltage input device and power supply method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114123104A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20130235622A1 (en) * | 2012-03-09 | 2013-09-12 | Konica Minolta Business Technologies, Inc. | Power supply device |
| TW201517471A (en) * | 2013-10-21 | 2015-05-01 | Chien-An Lai | Method and apparatus of inrush current limitation |
| KR101555146B1 (en) * | 2014-05-24 | 2015-09-22 | 임행삼 | Programmable electronic switches for AC power supply |
| CN110429702A (en) * | 2019-01-25 | 2019-11-08 | 美律电子(深圳)有限公司 | Power output apparatus and power supply output method |
| CN212908978U (en) * | 2020-08-28 | 2021-04-06 | 宸展光电(厦门)股份有限公司 | Voltage input device |
-
2020
- 2020-08-28 CN CN202010882919.3A patent/CN114123104A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20130235622A1 (en) * | 2012-03-09 | 2013-09-12 | Konica Minolta Business Technologies, Inc. | Power supply device |
| TW201517471A (en) * | 2013-10-21 | 2015-05-01 | Chien-An Lai | Method and apparatus of inrush current limitation |
| KR101555146B1 (en) * | 2014-05-24 | 2015-09-22 | 임행삼 | Programmable electronic switches for AC power supply |
| CN110429702A (en) * | 2019-01-25 | 2019-11-08 | 美律电子(深圳)有限公司 | Power output apparatus and power supply output method |
| CN212908978U (en) * | 2020-08-28 | 2021-04-06 | 宸展光电(厦门)股份有限公司 | Voltage input device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8441151B2 (en) | Power supply with arc flash protection mechanism and data-processing system employing same | |
| US8896157B2 (en) | Power supply and power supplying system with remote power management function | |
| US7924019B2 (en) | System and method for fault isolation and leakage current detection | |
| CN100471219C (en) | Terminal suited to be power supplied locally and for receiving remote feeding electricity by means of chain link | |
| KR20120124372A (en) | Time-domain multiplexing of power and data | |
| CN112367127B (en) | Antenna detection circuit, electronic device, and antenna control method | |
| CN212908978U (en) | Voltage input device | |
| CN110719124B (en) | Automatic turn-off circuit system based on power line broadband carrier communication technology | |
| EP0507495A1 (en) | Automatic system battery reconnect circuit responsive to insertion of new battery replacement | |
| CN111949592A (en) | Hot plug circuit device suitable for LVDS | |
| CN112526278B (en) | Switching device for optical module aging test, optical module aging device and method | |
| US20210104889A1 (en) | Hot swapping protection device for power over ethernet and method thereof | |
| CN114123104A (en) | Voltage input device and power supply method | |
| US6992599B2 (en) | Terminal adapter for connecting a terminal to a computer local area network capable of identifying any of several terminal types | |
| CN113206414A (en) | Direct current connector, alternating current-direct current input equipment and alternating current-direct current input system | |
| CN216959322U (en) | Electric spark eliminating circuit, power adapter and electronic equipment | |
| TWM604511U (en) | Voltage input device | |
| TWI759836B (en) | Voltage input device and power supplying method | |
| US10573997B1 (en) | Power supply unit with connector protection circuit | |
| CN112910041A (en) | Charging circuit of terminal equipment, terminal equipment and terminal system | |
| CN218040774U (en) | USB protection circuit and USB protection device | |
| CN113437792A (en) | Power supply control circuit | |
| CN211046449U (en) | Feedback compensation switching control circuit | |
| CN220775630U (en) | Wiring-saving terminal block | |
| TWI810905B (en) | Overvoltage protection device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |