CN114430247A - Voltage regulating circuit of nine-gear transformer - Google Patents
Voltage regulating circuit of nine-gear transformer Download PDFInfo
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- CN114430247A CN114430247A CN202011181498.8A CN202011181498A CN114430247A CN 114430247 A CN114430247 A CN 114430247A CN 202011181498 A CN202011181498 A CN 202011181498A CN 114430247 A CN114430247 A CN 114430247A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P13/00—Arrangements for controlling transformers, reactors or choke coils, for the purpose of obtaining a desired output
- H02P13/06—Arrangements for controlling transformers, reactors or choke coils, for the purpose of obtaining a desired output by tap-changing; by rearranging interconnections of windings
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Abstract
The invention discloses a voltage regulating circuit of a nine-gear transformer, which comprises a voltage regulating circuit input end, a voltage regulating circuit output end, a main winding, a polarity change-over switch, a voltage regulating winding, a transition switching unit, a rated voltage branch and a voltage regulating branch, wherein a tap at the input end of the main winding is connected with the voltage regulating circuit input end, a tap at the output end of the main winding is connected with the polarity change-over switch and the rated voltage branch in parallel, the input end of the rated voltage branch is connected with a tap at the output end of the main winding, the output end of the rated voltage branch is connected with the input end of the transition switching unit, the transition switching unit comprises a transition resistor and a transition on-off switch which are connected in parallel, the polarity change-over switch comprises 5 connecting pins and 2 linkage pieces, the 2 linkage pieces realize two circuit connecting structures and respectively correspond to a positive voltage regulating branch of 4 gears and a reverse voltage regulating branch of 4 gears to realize the nine-gear voltage switching, compared with the prior art, the pressure regulating branch is reduced, the cost is lower, the volume is smaller, and the structure is more optimized and reasonable.
Description
Technical Field
The invention relates to the technical field of distribution transformers and transformation transformers, in particular to a voltage regulating circuit of a nine-gear transformer.
Background
The voltage regulation of the transformer is realized by changing the number of turns of a coil (generally a high-voltage coil and low in current) by regulating and connecting a tap joint of the coil at one side of the transformer through a voltage regulating switch (a tap switch), so that the purpose of changing the output voltage is achieved.
The voltage regulation of the transformer is divided into no-load voltage regulation and on-load voltage regulation. The no-load voltage regulation is that the power supply of the transformer is disconnected, then the tap switch is regulated, and then the power supply is connected to ensure that the transformer works normally. The on-load voltage regulation is to keep the power supply off, so that the transformer is provided with a load regulation tap switch in a normal working state. The principle of the transformer is that when a moving contact of a switch is not completely separated from a first gear, a transition circuit is switched on (current between the two gears is limited by a transition resistor) to ensure that the transformer is not powered off, and when the moving contact reaches the other gear, the transition circuit is switched off, so that the adjustment is completed. Besides a transition circuit, the on-load tap changer also has to have good arc extinguishing performance.
For example, the invention discloses an on-load voltage regulating circuit of an interleaved parallel nine-gear transformer with polarity conversion, which is disclosed in the Chinese patent application No. CN201910634391.5 and comprises a main winding, a voltage regulating winding, a rated voltage branch, a transition switching unit and five voltage regulating branches. A polarity change-over switch is arranged between the main winding and the voltage regulating winding, and positive and negative voltage regulation is realized by adjusting the connection end of an independent contact of the polarity change-over switch; one end of each voltage regulating branch is respectively connected to two end taps of the voltage regulating winding and each middle tap; and the other ends of the two groups of the three-phase alternating current transformer are adjacently connected in parallel in a staggered mode to form two groups and respectively connected with two input ends of the transition switching unit, the input end of the rated voltage branch is connected with a tap of the output end of the main winding, and the output end of the rated voltage branch is connected with the output end of the voltage regulating circuit. In the whole nine-gear voltage regulation process, the gears are switched for eight times, and the electronic element with the highest on-off frequency in the circuit, namely the vacuum arc extinguish chamber of the transition switching unit, is only required to be opened and closed for four times, so that half of on-off times is saved compared with the prior art. However, the 9-gear voltage regulating circuit needs 5 voltage regulating branches, and is large in size and high in cost.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides the voltage regulating circuit of the nine-gear transformer, the voltage regulating circuit can realize nine-gear voltage transformation on the whole, but the number of lines of voltage regulating branches is reduced compared with the prior art, the cost is lower, the volume is smaller, and the structure is more optimized and reasonable.
In order to achieve the purpose, the invention adopts the technical scheme that: the utility model provides a voltage regulating circuit of nine grades of transformers, including the voltage regulating circuit input, the voltage regulating circuit output, main winding, polarity change over switch, the voltage regulating winding, transition switching unit, rated voltage branch road and voltage regulating branch road, the voltage regulating circuit input is connected in tap to the main winding input, main winding output tap parallel connection polarity change over switch and rated voltage branch road, the input and the main winding output tap of rated voltage branch road are connected, the output and the input of transition switching unit of rated voltage branch road are connected, the transition switching unit includes the parallel circuit structure who is formed by transition resistance and transition on-off switch parallel connection, the first input and the second input of this parallel circuit structure are transition switching unit, the first input is the voltage regulating circuit output concurrently, its characterized in that: the polarity switch comprises 5 connecting pins and 2 linkage plates, wherein the 2 linkage plates are distributed adjacently and move synchronously to form 2 connecting structures which are respectively a positive voltage regulating branch connecting structure and a negative voltage regulating branch connecting structure, each linkage plate can simultaneously conduct the 2 corresponding connecting pins,
the 5 connecting pins are respectively a first connecting pin, a second connecting pin, a third connecting pin, a fourth connecting pin and a fifth connecting pin,
the voltage regulating branch comprises a voltage regulating first branch, a voltage regulating second branch, a voltage regulating third branch and a voltage regulating fourth branch,
the voltage regulating winding comprises four sections of voltage regulating coils wound in the same direction and 5 voltage regulating winding taps, namely a voltage regulating coil L1, a voltage regulating coil L2, a voltage regulating coil L3 and a voltage regulating coil L4; the 5 voltage regulating winding taps are respectively an upper end tap, a lower end tap, an upper middle tap, a lower middle tap and a middle tap,
the output end tap of the main winding is connected with the fourth connecting pin, the fifth connecting pin is connected with the lower end tap, the third connecting pin is connected with the upper end tap, the second connecting pin is connected with the voltage regulating branch, the first connecting pin is connected with the lower end tap, the middle upper connecting tap is connected with the voltage regulating two branch, the middle tap is connected with the voltage regulating three branch, and the middle lower connecting tap is connected with the voltage regulating four branch;
the four voltage-regulating branches are connected with an on-off switch Km in series, one end of each voltage-regulating branch is connected with the second connecting pin, and the other end of each voltage-regulating branch is connected with the first input end of the transition switching unit; the voltage regulating branch is connected with an on-off switch K1 in series, one end of the voltage regulating branch is connected with the upper-middle tap, and the other end of the voltage regulating branch is connected with a second input end of the transition switching unit; the voltage regulating secondary branch is connected with an on-off switch K2 in series, one end of the voltage regulating secondary branch is connected with the middle tap, and the other end of the voltage regulating secondary branch is connected with a first input end of the transition switching unit; the three voltage-regulating branches are connected with an on-off switch K3 in series, one end of each voltage-regulating branch is connected with the middle-lower tap, and the other end of each voltage-regulating branch is connected with the second input end of the transition switching unit.
In the structure, the polarity change-over switch realizes two circuit connection structures through a double linkage structure, the two circuit connection structures realize the switching of nine-gear voltage in a mode of corresponding to 4-gear positive voltage regulation branches and 4-gear reverse voltage regulation branches, and one voltage regulation branch is reduced compared with the prior art.
Furthermore, 5 connection pins of the limit change-over switch are distributed at intervals along a straight line, 2 linkage pieces are distributed adjacently up and down along the straight line where the 5 connection pins are located, and the 2 linkage pieces are an upper linkage piece and a lower linkage piece respectively.
In the structure, 5 connecting pins of the polarity switch are linearly distributed, and the two 2 linkage pieces can slide along the linear direction to realize switching.
Furthermore, the limit change-over switch forms 2 connection relations along with the up-and-down sliding of the 2 linkage pieces, the first connection relation is that the upper linkage piece is simultaneously communicated with the first connection pin and the second connection pin, and the lower linkage piece is simultaneously communicated with the third connection pin and the fourth connection pin; the second connection relationship is that the upper linkage piece is simultaneously connected with the second and the third connection pins, and the lower linkage piece is simultaneously connected with the fourth and the fifth connection pins.
In the structure, 2 linkage pieces of the polarity switch form 2 connection relations through sliding, the first connection relation realizes a positive voltage boosting structure of the voltage regulating branch, the second connection relation realizes a negative voltage reducing structure of the voltage regulating branch, and the voltage boosting structure is maintained at a middle gear when rated voltage is supplied, so that smooth switching of a 9-gear circuit under the condition of no power failure is realized.
Furthermore, a transition on-off switch in the transition switching unit adopts a vacuum arc-extinguishing chamber.
In the structure, the transition switching unit provides short-circuit protection for the voltage switching process, and the vacuum arc-extinguishing chamber is adopted, so that the safety performance of the transformer is improved, and the service life of the transformer is prolonged.
Furthermore, the on-off switches connected in series on the voltage regulating branch and the rated voltage branch adopt vacuum arc-extinguishing chambers.
In the structure, under a high-voltage environment, the electric arc is easy to generate for conducting by adopting the on-off of a common switch, and the safety performance of the transformer is improved and the service life of the transformer is prolonged by adopting the vacuum arc extinguish chamber.
By adopting the scheme, the invention has the advantages of more reasonable integral structure, small integral volume, reduced process difficulty and reduced manufacturing cost.
The invention is further described below with reference to the accompanying drawings.
Drawings
FIG. 1 is a five-stage circuit configuration diagram of a first linkage structure in an embodiment of the present invention;
FIG. 2 is a circuit diagram of the first step operation of the fifth gear upshift and the sixth gear upshift of the first linkage structure in accordance with the exemplary embodiment of the present invention;
FIG. 3 is a circuit diagram of the first linkage structure after the second step of the fifth gear upshift and the sixth gear upshift in accordance with the exemplary embodiment of the present invention;
FIG. 4 is a circuit diagram of a sixth gear of the first linkage structure in an embodiment of the present invention;
FIG. 5 is a circuit diagram of a first step operation of a sixth gear seventh upshift with a first linkage configuration in accordance with an embodiment of the present invention;
FIG. 6 is a circuit diagram of the first linkage structure after a second step of six-gear seventh-gear upshift in accordance with an embodiment of the present invention;
FIG. 7 is a circuit diagram of a seventh stage of a first linkage structure according to an embodiment of the present invention;
FIG. 8 is a circuit diagram illustrating a seventh gear upshift and eighth gear upshift configuration of the first linkage configuration in accordance with an exemplary embodiment of the present invention after a first step;
FIG. 9 is a circuit diagram of the seventh step-up and eighth step-up first linkage structure of the second embodiment of the present invention;
FIG. 10 is a circuit diagram of a first linkage structure for eight stages according to an embodiment of the present invention;
FIG. 11 is a circuit diagram illustrating a first step of an eight-gear upshift and a ninth-gear upshift of a first linkage according to an embodiment of the present invention;
FIG. 12 is a circuit diagram of the first linkage structure after the second eight-gear upshift for the ninth gear in the embodiment of the present invention;
FIG. 13 is a structural circuit diagram of a ninth gear of the first linkage structure in an embodiment of the present invention;
FIG. 14 is a five-speed circuit configuration diagram of a second linkage arrangement in accordance with an embodiment of the present invention;
FIG. 15 is a schematic circuit diagram illustrating a fifth gear down-shift of the second linkage in accordance with an embodiment of the present invention after a first step;
FIG. 16 is a schematic circuit diagram illustrating the second five down and fourth down steps of the second linkage in accordance with an embodiment of the present invention;
FIG. 17 is a block circuit diagram of a fourth gear of the second linkage in an embodiment of the present invention;
FIG. 18 is a schematic circuit diagram illustrating the fourth down third gear of the second linkage in accordance with an exemplary embodiment of the present invention;
FIG. 19 is a schematic circuit diagram illustrating the second down step for the fourth gear of the second linkage in accordance with an embodiment of the present invention;
FIG. 20 is a circuit diagram of a third gear configuration of a second linkage arrangement in accordance with an embodiment of the present invention;
FIG. 21 is a circuit diagram illustrating the structure of the second linkage after a first down shift of the third gear in accordance with an embodiment of the present invention;
FIG. 22 is a circuit diagram illustrating the second step down three gear operation of the second linkage in accordance with an embodiment of the present invention;
FIG. 23 is a circuit diagram illustrating a second gear of the second linkage in accordance with an embodiment of the present invention;
FIG. 24 is a schematic circuit diagram illustrating a second gear down first operation of the second linkage arrangement in accordance with an embodiment of the present invention;
FIG. 25 is a circuit diagram illustrating the second linkage after a second step down of the second gear in accordance with an embodiment of the present invention;
fig. 26 is a circuit diagram of a first stage of a second linkage arrangement in accordance with an embodiment of the present invention.
Detailed Description
In the present invention, the input terminal and the output terminal are defined for clarity of connection of the constituent parts of the circuit, wherein "input" and "output" are used only for distinguishing different connection terminals and do not represent the flowing or transmitting direction of current or signals. The embodiment of the invention is shown in fig. 1 to 26, which is a voltage regulating circuit of a nine-gear transformer, and the voltage regulating circuit comprises a voltage regulating circuit input end, a voltage regulating circuit output end Xo, a main winding L, a polarity transfer switch Kj, a voltage regulating winding, a transition switching unit, a rated voltage branch and a voltage regulating branch, wherein a tap a of the main winding input end is connected with the voltage regulating circuit input end, a tap Xi of the main winding output end is connected with the polarity transfer switch Kj and the rated voltage branch in parallel, the input end of the rated voltage branch is connected with the tap Xi of the main winding output end, and the output end of the rated voltage branch is connected with the input end of the transition switching unit, in this embodiment, the voltage regulating circuit is connected with a first input end T1.
The transition switching unit comprises a parallel circuit structure formed by connecting a transition resistor R and a transition on-off switch K0 in parallel, the two ends of the parallel circuit structure are a first input end T1 and a second input end T2 of the transition switching unit, and the first input end is also used as an output end Xo of the voltage regulating circuit.
Polarity transfer switch Kj includes 5 connection feet and 2 linkage pieces, and every linkage piece can switch on its 2 connection feet that correspond respectively simultaneously respectively, 2 linkage pieces connect 4 connection feet on the polarity transfer switch promptly, and 2 linkage pieces are adjacent to be distributed, each other do not overlap, and synchronous motion forms 2 connection structure. Polarity transfer switch's 5 connect the foot by the picture from top to bottom distribute be first connecting pin, second respectively, the foot is connected to the third, the foot is connected to the fourth, the foot is connected to the fifth, 5 connect the foot along a straight line interval distribution, 2 linkage pieces are adjacent distribution about 5 connection foot place straight lines are along, 2 linkage pieces are last linkage piece and lower linkage piece respectively. The limit change-over switch forms 2 connection relations along with the up-and-down sliding of the 2 linkage pieces, the first connection relation is that the upper linkage piece is simultaneously communicated with the first connection pin and the second connection pin, and the lower linkage piece is simultaneously communicated with the third connection pin and the fourth connection pin; the second connection relationship is that the upper linkage piece is simultaneously connected with the second and the third connection pins, and the lower linkage piece is simultaneously connected with the fourth and the fifth connection pins.
The voltage regulating branch comprises a voltage regulating first branch, a voltage regulating second branch, a voltage regulating third branch and a voltage regulating fourth branch (which respectively correspond to on-off switches K1, K2, K3 and Km).
The voltage regulating winding comprises four sections of voltage regulating coils wound in the same direction, namely a voltage regulating coil L1, a voltage regulating coil L2, a voltage regulating coil L3 and a voltage regulating coil L4, the voltage regulating winding comprises 5 voltage regulating winding taps, namely an upper end tap X1, a lower end tap X5, an upper middle tap X2, a middle lower tap X4 and a middle tap X3, the upper middle tap X2 serves as a lower end tap of the voltage regulating coil L1 and an upper end tap of the voltage regulating coil L2, the middle tap X3 serves as a lower end tap of the voltage regulating coil L2 and an upper end tap of the voltage regulating coil L3, and the middle lower tap X3 serves as a lower end tap of the voltage regulating coil L3 and an upper end tap of the voltage regulating coil L4.
The tap Xi at the output end of the main winding is connected with a fourth connecting pin, a fifth connecting pin is connected with a tap X5 at the lower end, a third connecting pin is connected with a tap X1 at the upper end, a second connecting pin is connected with a voltage regulating branch, a first connecting pin is connected with a tap X5 at the lower end, an upper middle tap X2 is connected with a voltage regulating two branch, a middle tap X3 is connected with a voltage regulating three branch, and a lower middle tap X4 is connected with a voltage regulating four branch;
the voltage regulating four-branch circuit is connected with an on-off switch Km in series, one end of the voltage regulating four-branch circuit is connected with the second connecting pin, and the other end of the voltage regulating four-branch circuit is connected with a first input end T1 of the transition switching unit; the voltage regulating branch is connected with an on-off switch K1 in series, one end of the voltage regulating branch is connected with an upper middle tap X2, and the other end of the voltage regulating branch is connected with a second input end T2 of the transition switching unit; the voltage regulating secondary branch is connected with an on-off switch K2 in series, one end of the voltage regulating secondary branch is connected with a middle tap X3, and the other end of the voltage regulating secondary branch is connected with a first input end T1 of the transition switching unit; the three voltage-regulating branches are connected with an on-off switch K3 in series, one end of each voltage-regulating branch is connected with the middle-lower tap X4, and the other end of each voltage-regulating branch is connected with the second input end T2 of the transition switching unit.
The combination state of the polarity switch Kj and each on-off switch corresponds to each gear of the voltage regulating circuit as follows:
a first linkage is shown in fig. 1-13: the upper linkage piece is simultaneously communicated with the first connecting pin and the second connecting pin, and the lower linkage piece is simultaneously communicated with the third connecting pin and the fourth connecting pin.
Fifth gear: ke is closed, K0 is opened, and L1, L2, L3 and L4 are not connected with a circuit, so that power is supplied by rated voltage;
a sixth gear: ke is open, K1 is closed, K0 is closed, and L1 is connected into the circuit;
seventh gear: ke is open, K2 is closed, K0 is open, and L1 and L2 are connected into the circuit;
eighth gear: ke is open, K3 is closed, K0 is closed, and L1, L2 and L3 are connected into the circuit;
nine gears: ke open, Km close, K0 open, L1, L2, L3, L4 are accessing the circuit;
a second linkage is shown in fig. 14-26: the upper linkage piece is simultaneously communicated with the second connecting pin and the third connecting pin, and the lower linkage piece is simultaneously communicated with the fourth connecting pin and the fifth connecting pin.
Fifth gear: ke is closed, K0 is opened, and L1, L2, L3 and L4 are not connected into a circuit, so that power is supplied by rated voltage;
fourth gear: ke is opened, K3 is closed, K0 is closed, and L4 is reversely connected into the circuit;
third gear: ke is opened, K2 is closed, K0 is closed, and L3 and L4 are reversely connected into the circuit;
second gear: ke is closed, K1 is closed, K0 is closed, and L2, L3 and L4 are reversely connected into a circuit;
first gear: ke is closed, Km is closed, K0 is opened, and L1, L2, L3 and L4 are reversely connected into the circuit;
the boosting principle is as follows:
when the gear is five, the upper linkage piece of the polarity switch Kj is simultaneously communicated with the first connecting pin and the second connecting pin, and the lower linkage piece is simultaneously communicated with the third connecting pin and the fourth connecting pin; at this time, the on-off switch Ke of the rated voltage branch is closed, the on-off switches of the voltage regulating branches are all opened, and the transition on-off switch K0 in the transition switching unit is also opened.
When the sixth gear is shifted up, in the first step, the on-off switch K1 in the closed voltage regulating branch is closed, the cut-off switch K0 of the transition switching unit is in an off state, at the moment, the rated voltage branch supplies power, and the transition resistor provides short-circuit protection; and then, the on-off switch Ke on the rated voltage branch is disconnected, the voltage regulating coil L1 is connected into the circuit, and in the third step, the on-off switch K0 in the transition switching unit is closed, so that the switching of the fifth gear and the sixth gear is completed.
When the sixth gear is shifted up to the seventh gear, in the first step, the on-off switch K0 in the transition switching unit is switched off, then the on-off switch K2 in the voltage regulating branch is switched on, at the moment, both K1 and K2 are switched on, the voltage regulating coil L1 is connected into the circuit, in the third step, the on-off switch K1 in the voltage regulating branch is switched off, and the voltage regulating coils L1 and L2 are connected into the circuit, so that the sixth gear is shifted up to the seventh gear.
When the seventh gear is shifted up to the eighth gear, the on-off switch K3 of the voltage regulating branch is closed in the first step, the on-off switches K2 and K3 are both closed at the moment, the voltage regulating coils L1 and L2 are connected into the circuit, the on-off switch K2 is opened in the second step, the voltage regulating coils L1, L2 and L3 are connected into the circuit at the moment, and the on-off switch K0 of the transition switching unit is closed in the third step, so that the switching of the seventh gear and the eighth gear is completed.
When the eight gear is shifted up to the ninth gear, the on-off switch K0 of the transition switching unit is turned off in the first step, the on-off switch Km in the pressure regulating branch is turned on in the second step, the on-off switches K0 and Km are turned on at the moment, the pressure regulating coils L1, L2 and L3 are connected into the circuit, the on-off switch K3 is turned off, and the pressure regulating coils L1, L2, L3 and L4 are connected into the circuit at the moment, so that the eight gear is shifted up to the ninth gear.
The pressure reduction principle is as follows:
when the gear is five, the polarity switch Kj is switched, so that the upper linkage piece is simultaneously communicated with the second connecting pin and the third connecting pin, and the lower linkage piece is simultaneously communicated with the fourth connecting pin and the fifth connecting pin; at this time, the on-off switch Ke of the rated voltage branch is closed, the on-off switches of the voltage regulating branches are all opened, the transition on-off switch K0 in the transition switching unit is also opened, and the rated voltage branch supplies power.
When the fourth gear is reduced, in the first step, the on-off switch K3 in the voltage-regulating branch is closed, the cut-off switch K0 of the transition switching unit is in an off state, at the moment, the on-off switches K3 and Ke are both closed, the transition resistor provides short-circuit protection, and the rated voltage branch supplies power; and then, the on-off switch Ke on the rated voltage branch is disconnected, the voltage regulating coil L4 is reversely connected into the circuit, and in the third step, the on-off switch K0 in the transition switching unit is closed, so that the switching of the fifth gear and the fourth gear is completed.
When the third gear is shifted down, the on-off switch K0 in the transition switching unit is turned off in the first step, then the on-off switch K2 in the voltage regulating branch is turned on, at the moment, K3 and K2 are both turned on, the voltage regulating coil L1 is reversely connected into the circuit, the on-off switch K3 in the voltage regulating branch is turned off, and the voltage regulating coils L4 and L3 are reversely connected into the circuit, so that the switching of the fourth gear and the third gear is completed.
When the second gear is shifted down, the on-off switch K1 of the voltage regulating branch is closed in the first step, at the moment, the on-off switches K2 and K1 are both closed, the voltage regulating coils L4 and L3 are reversely connected into the circuit, the on-off switch K2 is opened, at the moment, the voltage regulating coils L4, L3 and L2 are reversely connected into the circuit, and the on-off switch K0 of the transition switching unit is closed in the third step, so that the switching of the third gear and the second gear is completed.
When the first gear is reduced, the on-off switch K0 of the transition switching unit is switched off in the first step, the on-off switch Km in the voltage regulating branch is switched on in the second step, the on-off switches K0 and Km are switched on at the moment, the voltage regulating coils L4, L3 and L2 are reversely connected into the circuit, the on-off switch K1 is switched off in the third step, and the voltage regulating coils L1, L2, L3 and L4 are reversely connected into the circuit at the moment, so that the second gear is reduced and the first gear is switched.
In the whole nine-gear voltage regulation process, rated voltage branches or voltage regulation branches in the previous gear supply power for the voltage regulation branches in the next gear, and the power-on state is always kept in the whole voltage regulation process. In addition, nine grades of voltage regulating circuit, through polarity switch's double-linkage structure make it reduce 4 voltage regulating branch roads by prior art's 5 voltage regulating branch roads, reduced the joint quantity of coil, make its structure more simplify, more rationalize on the global design, moreover on the global space greatly reduced, cost greatly reduced, the also greatly reduced of technology degree of difficulty, it is more easy to process and design, the reduction of circuit still helps promoting its security.
The present invention is not limited to the above embodiments, and those skilled in the art can implement the present invention in other embodiments according to the disclosure of the present invention, or make simple changes or modifications on the design structure and idea of the present invention, and fall into the protection scope of the present invention.
Claims (5)
1. The utility model provides a voltage regulating circuit of nine grades of transformers, including the voltage regulating circuit input, the voltage regulating circuit output, main winding, polarity change over switch, the voltage regulating winding, transition switching unit, rated voltage branch road and voltage regulating branch road, the voltage regulating circuit input is connected in tap to the main winding input, main winding output tap parallel connection polarity change over switch and rated voltage branch road, the input and the main winding output tap of rated voltage branch road are connected, the output and the input of transition switching unit of rated voltage branch road are connected, the transition switching unit includes the parallel circuit structure who is formed by transition resistance and transition on-off switch parallel connection, the first input and the second input of this parallel circuit structure are transition switching unit, the first input is the voltage regulating circuit output concurrently, its characterized in that: the polarity switch comprises 5 connecting pins and 2 linkage plates, wherein the 2 linkage plates are adjacently distributed and synchronously move to form 2 connecting structures which are respectively a positive voltage regulating branch connecting structure and a negative voltage regulating branch connecting structure, each linkage plate can simultaneously conduct the 2 corresponding connecting pins respectively, the 5 connecting pins are respectively a first connecting pin, a second connecting pin, a third connecting pin, a fourth connecting pin and a fifth connecting pin,
the voltage regulating branch comprises a voltage regulating first branch, a voltage regulating second branch, a voltage regulating third branch and a voltage regulating fourth branch,
the voltage regulating winding comprises four sections of voltage regulating coils wound in the same direction and 5 voltage regulating winding taps, namely a voltage regulating coil L1, a voltage regulating coil L2, a voltage regulating coil L3 and a voltage regulating coil L4; the 5 voltage regulating winding taps are respectively an upper end tap, a lower end tap, an upper middle tap, a lower middle tap and a middle tap,
the output end tap of the main winding is connected with the fourth connecting pin, the fifth connecting pin is connected with the lower end tap, the third connecting pin is connected with the upper end tap, the second connecting pin is connected with the voltage regulating branch, the first connecting pin is connected with the lower end tap, the middle upper connecting tap is connected with the voltage regulating two branch, the middle tap is connected with the voltage regulating three branch, and the middle lower connecting tap is connected with the voltage regulating four branch;
the four voltage-regulating branches are connected with an on-off switch Km in series, one end of each voltage-regulating branch is connected with the second connecting pin, and the other end of each voltage-regulating branch is connected with the first input end of the transition switching unit; the voltage regulating branch is connected with an on-off switch K1 in series, one end of the voltage regulating branch is connected with the upper-middle tap, and the other end of the voltage regulating branch is connected with a second input end of the transition switching unit; the voltage regulating secondary branch is connected with an on-off switch K2 in series, one end of the voltage regulating secondary branch is connected with the middle tap, and the other end of the voltage regulating secondary branch is connected with a first input end of the transition switching unit; the three voltage-regulating branches are connected with an on-off switch K3 in series, one end of each voltage-regulating branch is connected with the middle-lower tap, and the other end of each voltage-regulating branch is connected with the second input end of the transition switching unit.
2. The voltage regulating circuit of the nine-gear transformer according to claim 1, wherein: 5 connection feet of limit change over switch are along a straight line interval distribution, and 2 linkage pieces are adjacent distribution about 5 connection feet place straight lines are, and 2 linkage pieces are last linkage piece and lower linkage piece respectively.
3. The voltage regulating circuit of the nine-gear transformer according to claim 2, wherein: the limit change-over switch forms 2 connection relations along with the up-and-down sliding of the 2 linkage pieces, the first connection relation is that the upper linkage piece is simultaneously communicated with the first connection pin and the second connection pin, and the lower linkage piece is simultaneously communicated with the third connection pin and the fourth connection pin; the second connection relationship is that the upper linkage piece is simultaneously connected with the second and the third connection pins, and the lower linkage piece is simultaneously connected with the fourth and the fifth connection pins.
4. The voltage regulating circuit of the nine-gear transformer according to claim 1, wherein: and a transition on-off switch in the transition switching unit adopts a vacuum arc-extinguishing chamber.
5. The voltage regulating circuit of the nine-gear transformer according to claim 1, wherein the on-off switches connected in series on the voltage regulating branch and the rated voltage branch are vacuum arc-extinguishing chambers.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110190788A (en) * | 2019-07-15 | 2019-08-30 | 浙江宝威电气有限公司 | A kind of staggered-parallel-type multi gear transformer on-load voltage regulating circuit with dipole inversion |
| CN110212829A (en) * | 2019-07-15 | 2019-09-06 | 浙江宝威电气有限公司 | A kind of nine grades of transformer on-load voltage regulating circuits of staggered-parallel-type with dipole inversion |
| CN210469152U (en) * | 2019-07-15 | 2020-05-05 | 浙江宝威电气有限公司 | On-load voltage regulation circuit with polarity conversion for staggered parallel nine-gear transformer |
| CN213402869U (en) * | 2020-10-29 | 2021-06-08 | 浙江宝威电气有限公司 | Voltage regulating circuit of nine-gear transformer |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110190788A (en) * | 2019-07-15 | 2019-08-30 | 浙江宝威电气有限公司 | A kind of staggered-parallel-type multi gear transformer on-load voltage regulating circuit with dipole inversion |
| CN110212829A (en) * | 2019-07-15 | 2019-09-06 | 浙江宝威电气有限公司 | A kind of nine grades of transformer on-load voltage regulating circuits of staggered-parallel-type with dipole inversion |
| CN210469152U (en) * | 2019-07-15 | 2020-05-05 | 浙江宝威电气有限公司 | On-load voltage regulation circuit with polarity conversion for staggered parallel nine-gear transformer |
| CN213402869U (en) * | 2020-10-29 | 2021-06-08 | 浙江宝威电气有限公司 | Voltage regulating circuit of nine-gear transformer |
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