CN101471174B - Isolation transformer - Google Patents
Isolation transformer Download PDFInfo
- Publication number
- CN101471174B CN101471174B CN2007101861493A CN200710186149A CN101471174B CN 101471174 B CN101471174 B CN 101471174B CN 2007101861493 A CN2007101861493 A CN 2007101861493A CN 200710186149 A CN200710186149 A CN 200710186149A CN 101471174 B CN101471174 B CN 101471174B
- Authority
- CN
- China
- Prior art keywords
- voltage
- switch
- winding
- transformer
- power
- 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.)
- Active
Links
Images
Abstract
The invention discloses an isolation transformer which comprises an original side of transformer, a secondary side of transformer, a switch circuit for switching conducting state and off state, and a voltage detecting and control circuit. The original side comprises a voltage input end and at least two windings arranged between both terminals of the voltage input end, and the secondary side comprises a voltage output end and at least a winding arranged between both terminals of the voltage output end. The voltage detecting and control circuit is used for detecting input voltage or relevant values of input voltage, the control end of the voltage detecting and control circuit is coupled with the switch circuit for controlling at least two windings of the primary side to connect in parallel in order to increase coil turns of winding when the input voltage or the relevant values of input voltage conforms to a first voltage supply system, and the main voltage of the first voltage supply system is higher than a set threshold value. The isolation transformer can make devices adapt to various voltage systems, which is characterized by small size, light weight and low cost.
Description
[technical field]
The present invention relates to transformer equipment, be specifically related to a kind of isolating transformer with input voltage adapting.
[background technology]
In a lot of equipment,, generally need the isolating transformer that adopts for preventing leakage current.For example, in Medical Devices such as compuscan, often need peripheral hardwares such as configure printer, VCR to assist the doctor to diagnose, so also need the leakproof current design, the isolating transformer that adopted usually 1: 1 prevents leakage current.Consider product versatility in the world, the design of isolating transformer need be taken into account two kinds of electrical voltage systems of 115V/230Vac.To having adopted isolating transformer, and the Medical Devices of selling in the world, mainly adopt following two kinds of methods to adapt to local input voltage.
First kind of mode, as shown in Figure 1, the transformer adopting conservative design has the more number of turn and bigger coiling effective area.To the occasion of two kinds of different input voltages of 115/230Vac, transformer is not done any adjustment, directly uses.The winding of employing Fig. 1 mode is framework fixedly, owing to need take into account high voltage (can up to 264Vac) and electric current (full-load current under the corresponding minimum input voltage) greatly simultaneously, the volume of transformer, weight will be very big, when increasing cost, also, influence the technology and the mechanical performance of equipment owing to its bulkiness is difficult to install.
The second way as shown in Figure 2, is follow-on isolating transformer on transformer foundation shown in Figure 1, former limit of transformer and secondary respectively comprise two windings, by modes such as mechanical switchs, manually change the annexation of winding, adapt to the different occasions of 115V/230Vac.Adopt the framework of Fig. 2 mode, need know the voltage of electrical network in advance, and then carry out manual operations that fault-tolerance is low in conjunction with mechanical switch.Manual mode need be guided to fuselage with voltage-selected switch, or selects voltage is selected to be installed in machine intimate, and the former has increased the complexity of structure, and the latter substitutes and maintenance inconvenience.And because the restriction in the physical device, most occasions need be to switching operation inconvenience after the complete machine dismounting.
[summary of the invention]
Main purpose of the present invention just provides a kind of isolating transformer of simple in structure, easy operating, and it can adapt to the various different voltages system automatically.
For achieving the above object, the invention provides a kind of isolating transformer, the former limit that comprises transformer, secondary, be used for the switching circuit that between conducting state and off-state, switches, voltage detecting and control circuit, described former limit comprises voltage input end and is connected at least two windings between the voltage input end two-terminal, described secondary comprises voltage output end and is connected at least one winding between the voltage output end two-terminal, described voltage detecting and control circuit are used to detect input voltage or input voltage correlative, its control end is coupled to switching circuit, be used for when judging that according to detection voltage described transformer is the power supply of the first power voltage supply system, control the conducting of described switching circuit or disconnection so that connect to increase the coil turn of winding by series system between at least two windings in described former limit, the described first power voltage supply system is the electric power system of supply power voltage greater than setting threshold.
In one embodiment, described former limit preferably includes the first identical winding and second winding, and described switching circuit comprises first switch, second switch and the 3rd switch; First end of described first winding is coupled to voltage imports first end, second end of described second winding is coupled to voltage imports second end, described first switch is connected voltage and imports between first end of first end and second winding, described second switch is connected second end and the voltage of first winding and imports between second end, described the 3rd switch is connected between first end of second end of first winding and second winding, and first end of described first winding and first end of described second winding are end of the same name; Described voltage detecting and control circuit are when judging that according to the voltage that detects described transformer is the power supply of the first power voltage supply system, control that described first switch and second switch are in off-state and described the 3rd switch is in conducting state, when judging that according to the voltage that detects described transformer is the power supply of the second power voltage supply system, control that described first switch and second switch are in conducting state and described the 3rd switch is in off-state, the described second power voltage supply system is the electric power system that supply power voltage is less than or equal to setting threshold.
Described secondary preferably includes the identical tertiary winding and the 4th winding, and described switching circuit also comprises the 4th switch, the 5th switch and the 6th switch; First end of the described tertiary winding is coupled to voltage exports first end, second end of described the 4th winding is coupled to voltage exports second end, described the 4th switch is connected between first end of second end of the tertiary winding and the 4th winding, described the 5th switch is connected second end and the voltage of the tertiary winding and exports between second end, described the 6th switch is connected voltage and exports between first end of first end and the 4th winding, and first end of the described tertiary winding and first end of described the 4th winding are end of the same name; Described voltage detecting and control circuit are used for when judging that according to the voltage that detects described transformer is the power supply of the first power voltage supply system, controlling described the 4th switch is in conducting state and described the 5th switch and the 6th switch and is in off-state, when judging that according to the voltage that detects described transformer is the power supply of the second power voltage supply system, control described the 4th switch and be in off-state and described the 5th switch and the 6th switch and be in conducting state.
The invention has the beneficial effects as follows:
The present invention detects the input voltage correlative that input voltage maybe can characterize the input voltage size by voltage detecting and control circuit, and switching circuit is controlled according to testing result, former limit winding connection is changed, be that winding connection automaticallyes switch according to input voltage, thereby the configuration of the former limit of transformer winding and the size of transformer input voltage are adapted.Therefore, the present invention can overcome the defective of prior art, in the process that equipment uses, can adapt to the multiple different and bigger electric power system of voltage difference automatically.The present invention compares with first kind of mode in the prior art, does not need to use the winding with a lot of numbers of turn and bigger coiling effective area, thereby has reduced the volume and weight of transformer.The present invention compares with the second way in the prior art, do not need manual operation, the present invention can be automaticallyed switch according to input voltage, and each winding all is fully utilized, help reducing coil turn, thereby reduce the volume and weight of transformer, make also that thus the installation of isolating transformer and use are simple, and be convenient to operation, high efficiency, small size and low cost.And present embodiment is because of the control of switching circuit, transformer is in the partition state when standby, have only voltage detecting and control circuit in the isolating transformer keeping necessary sampling and Control work, so, than existing transformer under holding state winding to the loss of energy, present embodiment can reduce stand-by power consumption, can be effectively energy-conservation.
In improved plan, former limit is two identical windings, can use the mode of serial or parallel connection according to the different mining of input voltage, has taken into account high voltage and big electric current simultaneously, and enough power can be provided under the situation of full load.
In further improved plan, respectively there are two identical windings on former and deputy limit, no matter switch to which kind of mode, winding in the present embodiment has all participated in the transformation conversion, not idle winding, thereby made full use of each winding, on the basis that guarantees to take into account various power voltage supply system, effectively reduced the volume and the cost of transformer.
[description of drawings]
Fig. 1 is the circuit diagram of existing a kind of isolating transformer;
Fig. 2 is the circuit diagram of existing another kind of isolating transformer;
Fig. 3 is the circuit diagram of the isolating transformer of the embodiment of the invention one;
Fig. 4 is the circuit diagram of the isolating transformer of the embodiment of the invention two;
Fig. 5 is the circuit diagram of the isolating transformer of the embodiment of the invention three;
Fig. 6 is the circuit diagram of the isolating transformer of the embodiment of the invention four.
[embodiment]
Feature of the present invention and advantage will be elaborated in conjunction with the accompanying drawings by embodiment.
Isolating transformer of the present invention comprises former limit and secondary, voltage detecting and the control circuit of transformer, and at the switching circuit that between conducting state and off-state, switches under the control of voltage detecting and control circuit.
The former limit of transformer is meant the coil that transformer links to each other with power supply, and the secondary of transformer is meant the coil that links to each other with load.Among the present invention, the former limit of transformer comprises voltage input end and is connected at least two windings between the voltage input end two-terminal, and secondary comprises voltage output end and is connected at least one winding between the voltage output end two-terminal.
Described voltage detecting and control circuit are used to detect input voltage or input voltage correlative, the input voltage correlative is the function of input voltage, for example output voltage can be used as the input voltage correlative, output voltage and input voltage are certain no-load voltage ratio relation, isolating transformer for 1: 1, output voltage equals input voltage, and for 2: 1 isolating transformer, output voltage equaled 1/2 of input voltage.Described voltage detecting and control circuit are according to the conducting or the disconnection of each switch in the voltage cut-out circuit that detects, when input voltage or input voltage correlative meet the first power voltage supply system, control between at least two windings in described former limit by series system and connect to increase the coil turn of winding, the described first power voltage supply system is the electric power system of supply power voltage greater than setting threshold.In view of the voltage of global various countries mainly comprises 100V, 110V, 120V, 127V, 220V, 230V, 240V totally 7 kinds of voltages, so in a preferred embodiment of the invention, the described first power voltage supply system is meant that supply power voltage is the electric power system of 220V-240V, the described second power voltage supply system is meant that supply power voltage is the electric power system of 100V-127V, and described setting threshold is that 127V is to certain value between the 220V.The first power voltage supply system and the second power voltage supply system also are commonly called the 230V/115V electric power system.
Setting threshold can change according to practical experience, and after the setting threshold change, the also corresponding change of the scope of the first power voltage supply system and the second power voltage supply system when new electric power system occurring, can be sorted out this electric power system according to setting threshold.
Embodiment one:
Please refer to Fig. 3, the former limit of isolating transformer comprises the first identical winding N1 and the second winding N2, and secondary comprises identical tertiary winding N3 and the 4th winding N4, and above-mentioned winding respectively has first end and second end, first end of each winding end of the same name each other, second end of each winding end also of the same name each other.In the present embodiment, switching circuit adopts the circuit of being made up of relay, comprise first K switch 1, second switch K2 and the 3rd K switch 3 that are positioned at former limit, and the 4th K switch 4, the 5th K switch 5 and the 6th K switch 6 that are positioned at secondary, each switch corresponds to relay.The voltage detecting end of described voltage detecting and control circuit is coupled to the voltage input end on described former limit, is used to detect input voltage vin, and its control end is coupled to each switch.
Wherein, first end of the first winding N1 is coupled to voltage imports the first end Vin I, second end of the described second winding N2 is coupled to voltage imports the second end Vin II, described first K switch 1 is connected voltage and imports between first end of the first end Vin I and the second winding N2, described second switch K2 is connected second end and the voltage of the first winding N1 and imports between the second end Vin II, and described the 3rd K switch 3 is connected between first end of second end of the first winding N1 and the second winding N2.First end of described tertiary winding N3 is coupled to voltage exports the first end Vout I, second end of described the 4th winding N4 is coupled to voltage exports the second end Vout II, described the 4th K switch 4 is connected between first end of second end of tertiary winding N3 and the 4th winding N4, described the 5th K switch 5 is connected second end and the voltage of tertiary winding N3 and exports between the second end Vout II, and described the 6th K switch 6 is connected voltage and exports between first end of the first end Vout I and the 4th winding N4.In the present embodiment, the 3rd K switch 3 is responsible for realizing that controllable suitable the connecing between the former limit first winding N1 and the second winding N2 is connected in series, the 4th K switch 4 is responsible for realizing that controllable suitable the connecing between secondary tertiary winding N3 and the 4th winding N4 is connected in series, first K switch 1 and second switch K2 are responsible for realizing controllable being connected in parallel between the former limit first winding N1 and the second winding N2, and the 5th K switch 5 and the 6th K switch 6 are responsible for realizing controllable being connected in parallel between secondary tertiary winding N3 and the 4th winding N4.
The operation principle of circuit shown in Figure 3 is as follows:
It (is the High Voltage Power Supply system that described voltage detecting and control circuit meet the first power voltage supply system in the input voltage vin that detects, 230V electric power system for example) time, control that described first K switch 1 and second switch K2 are in off-state and described the 3rd K switch 3 is in conducting state, and control described the 4th K switch 4 and be in conducting state and described the 5th K switch 5 and the 6th K switch 6 and be in off-state, be connected after the first winding N1 on former like this limit and the second winding N2 series connection that voltage is imported the first end Vin I and voltage is imported between the second end Vin II, be connected after the tertiary winding N3 of secondary and the 4th winding N4 also connect that voltage is exported the first end Vout I and voltage is exported between the second end Vout II, thereby the active coil number of turn of former limit and secondary is all increased.
It (is the low voltage power supply system that described voltage detecting and control circuit meet the second power voltage supply system in the input voltage vin that detects, 115V electric power system for example) time, control that described first K switch 1 and second switch K2 are in conducting state and described the 3rd K switch 3 is in off-state, and control described the 4th K switch 4 and be in off-state and described the 5th K switch 5 and the 6th K switch 6 and be in conducting state, be connected after the first winding N1 on former like this limit and the second winding N2 parallel connection that voltage is imported the first end Vin I and voltage is imported between the second end Vin II, be connected after the tertiary winding N3 of secondary and the 4th winding N4 parallel connection that voltage is exported the first end Vout I and voltage is exported between the second end Vout II, thereby the line footpath of the active coil of former limit and secondary is all increased.Thereby present embodiment has been taken into account high voltage (can up to 264Vac) and electric current (full-load current under the corresponding minimum input voltage) greatly simultaneously by detecting voltage and automaticallying switch.
In the present embodiment, voltage detecting and control circuit are arranged on the former limit of isolating transformer, the voltage that is transformer is imported an end, and voltage detecting and control circuit detect the input voltage value of transformer, and according to the closure/shutoff of each contact of control relay as a result of detecting.With two kinds of common electrical voltage systems of present embodiment dual-purpose is that the situation of 115VAC electric power system and 230VAC electric power system is an example.When voltage detecting and control circuit detect input and become 115V AC electric power system by 230VAC, then control former limit and promptly import first K switch 1 of an end, second switch K2 closure, the 3rd K switch 3 disconnects, and the 4th K switch 4 that the control secondary is promptly exported an end disconnects the 5th K switch 5, the 6th K switch 6 closures.At this moment, the first winding N1 on former limit and the second winding N2 switch to by being connected in series and are connected in parallel, and the tertiary winding N3 of secondary and the 4th winding N4 switch to by being connected in series and be connected in parallel.Because former limit winding and secondary winding are to adapt to the 230V input voltage during according to serial connection, and the mode that adapts to the 115V input voltage when connecing is matched, so, when transformer changes the 115V input voltage over to by the 230V input voltage, controlled the switching to by being connected in series of each winding of former limit and each winding of secondary is connected in parallel, so transformer can obtain copper loss low when maximum input current.Otherwise, when voltage detecting and control circuit detect input and become the 230VAC electric power system by 115V AC, then control former limit and promptly import first K switch 1 of an end, second switch K2 disconnection, the 3rd K switch 3 closures, and the control secondary is promptly exported the 4th K switch 4 closures of an end, and the 5th K switch 5, the 6th K switch 6 disconnect.At this moment, the first winding N1 and the second winding N2 on former limit are connected in series, and the first winding N3 and the second winding N4 of secondary are connected in series, and under this kind situation, transformer can obtain iron loss low when maximum input voltage.Can see that the present invention compared with prior art has adaptivity, and can adjust winding automatically the transformer conversion efficiency is assigned to higher in different electric power systems.No matter switch to which kind of mode, the winding in the present embodiment has all participated in the transformation conversion, idle winding, thus made full use of each winding, on the basis that guarantees to take into account various power voltage supply system, effectively reduced the volume and the cost of transformer.
Usually, transformer can still be in the transformation state when standby, there is bigger excitation, and present embodiment is because of the control of switching circuit, and transformer is in the partition state when standby, has only voltage detecting and control circuit in the isolating transformer keeping necessary sampling and Control work, so, winding is to the loss of energy under holding state than existing transformer, and present embodiment can reduce stand-by power consumption, can be effectively energy-conservation.
Embodiment two:
Please refer to Fig. 4, compare with embodiment one, the difference of present embodiment is: the way switch in the switching circuit is a normally closed relay, in case thereby can form path after making the isolating transformer energized, has voltage output at secondary, thereby voltage detecting and control circuit can be arranged on the transformer secondary, as shown in Figure 4, detects the output voltage of secondary.In Fig. 4, the 4th K switch 4 of the 3rd K switch 3 on former limit and secondary is a normally closed relay, and remaining switch is a normally opened relay.Simultaneously, voltage detecting and control circuit are arranged on secondary, the sample voltage signal of described secondary, and go out the size of the input voltage on the former limit of transformer according to the transformation ratio analysis and judgement of voltage signal that samples and transformer, control with this state, thereby realize between each winding of former limit and the switching of connection in series-parallel connected mode between each winding of secondary each switch.Circuit switches on the present embodiment principle and embodiment one are identical.
Because, the 3rd K switch 3 and the 4th K switch 4 are normally closed switch, like this, during input voltage, do not need first operating contact switch, transformer promptly moves under the acquiescence operating state, therefore, be arranged on the transformer secondary and promptly export the voltage detecting of an end and the voltage signal that can sample secondary of control circuit, judge the size of transformer input voltage, and each adhesive of getting an electric shock of control relay disconnects action in view of the above according to this signal.Because the transformer secondary belongs to load end, the existing circuit that can make full use of load end is realized the part even the repertoire of voltage detecting and control circuit, and generally do not need again this part circuit of specialized designs, therefore, further simplified circuit structure and simplified control flow.
Embodiment three:
Please refer to Fig. 5, former limit comprises the first identical winding N1 and the second winding N2, secondary comprises one the 5th winding N5, switching circuit comprises first K switch 1, second switch K2 and the 3rd K switch 3 that is positioned at former limit, voltage detecting and control circuit are positioned at former limit, and voltage detecting is identical with embodiment one with the circuit connecting relation of control circuit, the first winding N1 and the second winding N2, first K switch 1, second switch K2 and the 3rd K switch 3.When voltage detecting and control circuit sample input voltage when being 115Vac, first K switch 1, second switch K2 closure, the 3rd K switch 3 disconnects, and when input voltage is 230Vac, first K switch 1, second switch K2 disconnection, the 3rd K switch 3 closures.Like this, under two kinds of electric power systems of 230/115Vac, all can obtain relatively consistent output voltage V out, concrete voltage is decided on the number of turn of secondary winding N5.This kind method converts for narrow voltage output output voltage V out to, can simplify the late-class circuit design.
Embodiment four:
Please refer to Fig. 6, present embodiment is comprehensive to embodiment one and embodiment three, former limit comprises the first identical winding N1 and the second winding N2, secondary comprises three windings, wherein tertiary winding N3 is identical with the 4th winding N4, switching circuit comprises first K switch 1 that is positioned at former limit, second switch K2 and the 3rd K switch 3 and the 4th K switch 4 that is positioned at secondary, the 5th K switch 5 and the 6th K switch 6, voltage detecting and control circuit are positioned at former limit, voltage detecting and control circuit, the first winding N1 and the second winding N2, first K switch 1, second switch K2 and the 3rd K switch 3, tertiary winding N3 and the 4th winding N4, the 4th K switch 4, the circuit connecting relation of the 5th K switch 5 and the 6th K switch 6 is identical with embodiment one, and the 5th winding N5 of secondary is an independent winding.Present embodiment is except that passing through tertiary winding N3 and the 4th winding N41: the 1 output Vout1, can also obtain a narrow voltage output Vout2 according to the number of turn of the 5th winding N5.When N5=N3, can also look concrete condition and directly adopt N3 output Vout2, or according to actual conditions and around after output again.In like manner, more output maybe needs the output voltage of Vout2 is adjusted if desired, can adopt more winding.
Among the above embodiment, voltage detecting and control circuit can be set to a module, also can be provided with physically relatively independently.The implementation of voltage detecting and control circuit is more flexible, for example can be at elementary employing rectification branch road, directly adopt elementary STANDBY circuit, isolating transformer itself to increase modes such as an auxiliary check winding to cooperate comparison circuit to realize.
In addition, though above embodiment is example to use 115VAC and 230VAC electric power system, obviously is not limited to the situation of 115V and 230V, for example, by suitable apolegamy winding, the transformer of this structure can reach effect preferably equally at the supply district of 90～140V and 198～264V.
Among the above embodiment, former limit can have only a relay, first K switch 1, second switch K2 and the 3rd K switch 3 are respectively the contacts on this relay, same secondary also can have only a relay, and the 4th K switch 4, the 5th K switch 5 and the 6th K switch 6 are respectively the contacts on this relay.
Among the above embodiment, switching circuit can also be made up of triode or field effect transistor, by design circuit triode or field effect transistor circuit, make the control end of voltage detecting and control circuit be coupled to the grid of the base stage or the field effect transistor of triode, and respective point is coupled to as the current lead-through end in the other two ends of triode or field effect transistor.
Among the above embodiment, the first power voltage supply system can also be meant the electric power system of 198～264V supply district, and the described second power voltage supply system is meant that supply power voltage is the electric power system of 90～140V supply district.
Among the above embodiment, when voltage detecting and control circuit are judged detecting voltage, the voltage range that detects magnitude of voltage and some settings can be compared, judge that this detection magnitude of voltage falls into the voltage range of which setting, and judge that in view of the above it still is the second power voltage supply system that input voltage belongs to the first power voltage supply system.Can also compare detecting magnitude of voltage and a preset threshold, whether judge this detection magnitude of voltage greater than this setting threshold, if think that then input voltage belongs to the first power voltage supply system, otherwise think that input voltage belongs to the second power voltage supply system.
Among the above embodiment, the first winding N1 and the second winding N2 also can be windings inequality, but in this case, can only be with the first winding N1 and second winding N2 series connection and can not be with both parallel connections.When belonging to the 230V electric power system, with the first winding N1 and second winding N2 series connection for input voltage.And when belonging to the 115V electric power system, have only one among the first winding N1 and the second winding N2 effectively, and another is in idle state for input voltage, this situation because of the line that do not increase winding directly, can cause reducing the power output of transformer.
As another aspect of the present invention, this isolating transformer can be applicable to various power consumption equipment, as the medical electronics diagnostic device of medical field.Use the equipment of isolating transformer of the present invention can adapt to country variant and regional electrical network automatically, can in world's voltage range, use, improved the fault-tolerance of operation and the versatility of product, simplified technology simultaneously, reduced cost.For example, adopt the compuscan of above-mentioned isolating transformer, can adapt to the electric power system of 115V AC and two kinds of voltages of 230VAC, it is very convenient that Transformer Winding is switched use, reduced the transformer cost.
The present invention participates in the number of turn of the winding of transformation of electrical energy by change, thereby can adjust flexibly transformer I/O map ratio, makes the transformer output voltage adapt to the unequally loaded work requirements.The present invention not only makes volume, weight and the cost of isolating transformer obviously reduce, when being used, equipment adapts to the various different voltages system automatically, after to the input voltage sample detecting, opening/off state of control switch device, automatic switchover changes the winding connection of isolating transformer according to input voltage, and equipment can be used in world's voltage range.With respect to existing isolating transformer, the present invention can adapt to the electrical network in country variant and area automatically, improve the fault-tolerance of operation and the versatility of product, simplified technology simultaneously, the high efficiency, small size and the low cost that have realized transformer and used the equipment of this transformer.
Above content be in conjunction with concrete preferred implementation to further describing that the present invention did, can not assert that concrete enforcement of the present invention is confined to these explanations.For the general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, can also make some simple deduction or replace, these deduction or replace all should be considered as belonging to protection scope of the present invention.
Claims (9)
1. isolating transformer, the former limit and the secondary that comprise transformer, it is characterized in that: also comprise being used for the switching circuit and voltage detecting and the control circuit that between conducting state and off-state, switch, described former limit comprises voltage input end and is connected at least two windings between the voltage input end two-terminal, described secondary comprises voltage output end and is connected at least one winding between the voltage output end two-terminal, described voltage detecting and control circuit are used to detect input voltage or input voltage correlative, the control end of described voltage detecting and control circuit is coupled to switching circuit, when described voltage detecting and control circuit judge that according to the voltage that detects described transformer is the power supply of the first power voltage supply system, control the conducting of described switching circuit or disconnection so that connect to increase the coil turn of winding by series system between at least two windings in described former limit, the described first power voltage supply system is the electric power system of supply power voltage greater than setting threshold.
2. isolating transformer as claimed in claim 1 is characterized in that: described former limit comprises the first identical winding and second winding, and described switching circuit comprises first switch, second switch and the 3rd switch; First end of described first winding is coupled to voltage imports first end, second end of described second winding is coupled to voltage imports second end, described first switch is connected voltage and imports between first end of first end and second winding, described second switch is connected second end and the voltage of first winding and imports between second end, described the 3rd switch is connected between first end of second end of first winding and second winding, and first end of described first winding and first end of described second winding are end of the same name; Described voltage detecting and control circuit are when judging that according to the voltage that detects described transformer is the power supply of the first power voltage supply system, control that described first switch and second switch are in off-state and described the 3rd switch is in conducting state, when judging that according to the voltage that detects described transformer is the power supply of the second power voltage supply system, control that described first switch and second switch are in conducting state and described the 3rd switch is in off-state, the described second power voltage supply system is the electric power system that supply power voltage is less than or equal to setting threshold.
3. isolating transformer as claimed in claim 2 is characterized in that: described secondary comprises the identical tertiary winding and the 4th winding, and described switching circuit also comprises the 4th switch, the 5th switch and the 6th switch; First end of the described tertiary winding is coupled to voltage exports first end, second end of described the 4th winding is coupled to voltage exports second end, described the 4th switch is connected between first end of second end of the tertiary winding and the 4th winding, described the 5th switch is connected second end and the voltage of the tertiary winding and exports between second end, described the 6th switch is connected voltage and exports between first end of first end and the 4th winding, and first end of the described tertiary winding and first end of described the 4th winding are end of the same name; Described voltage detecting and control circuit are used for when judging that according to the voltage that detects described transformer is the power supply of the first power voltage supply system, controlling described the 4th switch is in conducting state and described the 5th switch and the 6th switch and is in off-state, when judging that according to the voltage that detects described transformer is the power supply of the second power voltage supply system, control described the 4th switch and be in off-state and described the 5th switch and the 6th switch and be in conducting state.
4. isolating transformer as claimed in claim 2, it is characterized in that: the described first power voltage supply system is meant that supply power voltage is the electric power system of 220V, 230V and 240V, the described second power voltage supply system is meant that supply power voltage is the electric power system of 100V, 110V, 120V and 127V, and described setting threshold is that 127V is to certain value between the 220V.
5. isolating transformer as claimed in claim 2 is characterized in that: described secondary comprises a winding.
6. as each described isolating transformer in the claim 2 to 5, it is characterized in that: the voltage detecting end of described voltage detecting and control circuit is coupled to the voltage input end on described former limit, is used to detect input voltage.
7. isolating transformer as claimed in claim 6 is characterized in that: the circuit of described switching circuit for being made up of triode, field effect transistor or relay.
8. isolating transformer as claimed in claim 3, it is characterized in that: described first switch, second switch, the 3rd switch, the 4th switch, the 5th switch and the 6th switch are relay, described first switch, second switch, the 5th switch and the 6th switch are normally opened relay, described the 3rd switch and the 4th switch are normally closed relay, the voltage detecting end of described voltage detecting and control circuit is coupled to the voltage output end of described secondary, is used to detect the output voltage relevant with input voltage.
9. isolating transformer as claimed in claim 5, it is characterized in that: described first switch, second switch and the 3rd switch are relay, described first switch and second switch are normally opened relay, described the 3rd switch is a normally closed relay, the voltage detecting end of described voltage detecting and control circuit is coupled to the voltage output end of described secondary, is used to detect the output voltage relevant with input voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007101861493A CN101471174B (en) | 2007-12-27 | 2007-12-27 | Isolation transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007101861493A CN101471174B (en) | 2007-12-27 | 2007-12-27 | Isolation transformer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101471174A CN101471174A (en) | 2009-07-01 |
| CN101471174B true CN101471174B (en) | 2011-01-26 |
Family
ID=40828542
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2007101861493A Active CN101471174B (en) | 2007-12-27 | 2007-12-27 | Isolation transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101471174B (en) |
Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009098824A1 (en) * | 2008-02-06 | 2009-08-13 | Murata Manufacturing Co., Ltd. | Transformer and transformer device |
| CN102570573A (en) * | 2011-12-31 | 2012-07-11 | 成都市华为赛门铁克科技有限公司 | Power supply method and system as well as power supply |
| CN105099215A (en) * | 2014-05-21 | 2015-11-25 | 济南芯驰能源科技有限公司 | Aircraft ground miniaturization power supply suitable for multiple power supply modes |
| CN104009638B (en) * | 2014-06-09 | 2016-08-24 | 深圳市华星光电技术有限公司 | A kind of circuit for adjusting output voltage and method |
| CN105553280B (en) * | 2016-02-03 | 2019-02-05 | 华为技术有限公司 | Power transformer and power control method |
| CN107947614B (en) * | 2017-12-01 | 2019-11-12 | 南京邮电大学 | Inverter and its short circuit loss suppressing method based on the switching of input terminal series voltage |
| CN109873571A (en) * | 2017-12-04 | 2019-06-11 | 邹晓灵 | A kind of general inverter and its control method |
| WO2019208318A1 (en) * | 2018-04-26 | 2019-10-31 | パナソニックＩｐマネジメント株式会社 | Power conversion device |
| CN109831110A (en) * | 2019-02-22 | 2019-05-31 | 易事特集团股份有限公司 | UPS rear class output circuit |
| CN112928903A (en) * | 2019-12-05 | 2021-06-08 | 漳州灿坤实业有限公司 | Wide voltage input circuit, baking tray, ironing device and electric hair drier |
| CN115104253A (en) * | 2021-01-22 | 2022-09-23 | 深圳市佳士科技股份有限公司 | Power supply circuit and power supply device |
| CN113162123A (en) * | 2021-02-09 | 2021-07-23 | 东方日立(成都)电控设备有限公司 | High-low voltage output ship shore power supply device |
| CN113990637B (en) * | 2021-09-24 | 2023-11-07 | 成都尚华电气有限公司 | Dual-frequency transformer and traction power supply system |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1414578A (en) * | 2002-12-09 | 2003-04-30 | 常传忠 | Isolated voltage regulating transformer and its voltage regulating method |
| JP2005093561A (en) * | 2003-09-12 | 2005-04-07 | Fdk Corp | High-voltage generating transformer |
| CN1773827A (en) * | 2005-11-01 | 2006-05-17 | 南京航空航天大学 | Push-pull ortho-exciting three-level DC inverter |
-
2007
- 2007-12-27 CN CN2007101861493A patent/CN101471174B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1414578A (en) * | 2002-12-09 | 2003-04-30 | 常传忠 | Isolated voltage regulating transformer and its voltage regulating method |
| JP2005093561A (en) * | 2003-09-12 | 2005-04-07 | Fdk Corp | High-voltage generating transformer |
| CN1773827A (en) * | 2005-11-01 | 2006-05-17 | 南京航空航天大学 | Push-pull ortho-exciting three-level DC inverter |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101471174A (en) | 2009-07-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101471174B (en) | Isolation transformer | |
| US7763990B2 (en) | Hybrid green uninterruptible power system and bi-directional converter module and power conversion method thereof | |
| CN102072997A (en) | Spare automatic switching logic test method for checking main transformer mutual switching mode | |
| EP3506457B1 (en) | Charging power system with low standby power consumption and method of controlling the same | |
| CN1983784A (en) | Power unit and high-voltage frequency converter with contactor bypass function | |
| CN101951134A (en) | Cascade topology frequency converter and bypass topology thereof | |
| CN101109787A (en) | Intelligent detecting device for under-voltage releasing equipment of breaker | |
| CN202221921U (en) | Transformer station standby power automatic switching system having open-phase protection function | |
| CN110535139B (en) | Broad width pressure regulating device | |
| CN101707392B (en) | Alternating and direct current isolation control method of uninterruptible power supply and circuit | |
| CN201584953U (en) | Single-phase alternating current contactor consisting of low loss alternating current electronic switch circuit | |
| CN105871221A (en) | Transformer system with low no-load loss | |
| CN210923901U (en) | Valve unit aging device | |
| CN204271513U (en) | A kind of loaded capacity-regulated transformer station realizing Based Intelligent Control | |
| CN209982174U (en) | Parallel AC UPS | |
| CN203721639U (en) | Anti-interference-electricity delay timer | |
| CN205229356U (en) | Intelligence capacitor switching test device | |
| CN205544951U (en) | Low no -load loss's transformer system | |
| CN207819548U (en) | A kind of universal automatic transfer switching electric appliance controller | |
| CN216530728U (en) | Transformer power-saving operation control device | |
| CN101944711A (en) | Distribution box | |
| CN206842773U (en) | A kind of elevator emergency rescue device DC bus powered to elevator frequency converter | |
| CN111707898B (en) | Load testing method of train power supply system | |
| CN219659476U (en) | Remote control test device for power communication power supply | |
| CN114123515A (en) | Power-saving operation control device for transformer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20180523 Address after: 518057 the 1-4 floor of MINDRAY building, science and technology south twelve Road, Nanshan District high tech Industrial Park, Shenzhen, Guangdong. Co-patentee after: SHENZHEN MINDRAY SCIENTIFIC Co.,Ltd. Patentee after: SHENZHEN MINDRAY BIO-MEDICAL ELECTRONICS Co.,Ltd. Address before: 518057 MINDRAY science and technology south twelve road MINDRAY high tech Industrial Park, Shenzhen, Guangdong Patentee before: SHENZHEN MINDRAY BIO-MEDICAL ELECTRONICS Co.,Ltd. |
|
| EE01 | Entry into force of recordation of patent licensing contract | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Application publication date: 20090701 Assignee: Shenzhen Mindray Animal Medical Technology Co.,Ltd. Assignor: SHENZHEN MINDRAY BIO-MEDICAL ELECTRONICS Co.,Ltd. Contract record no.: X2022440020009 Denomination of invention: an isolation transformer Granted publication date: 20110126 License type: Common License Record date: 20220804 |