Summary of the invention
The object of the invention provides a kind of thyristor to control exactly for addressing the above problem, and adjustable range is bigger, and reaction speed is fast, and voltage is adjustable continuously, and internal reactance is less, and the variation of output voltage receives the less continuous controllable transformer of the variable effect of load current.
For realizing above-mentioned purpose, the present invention adopts following technical scheme:
A kind of continuous controllable transformer, it comprises:
A continuous controllable transformer core, iron core comprise the pillar that 5 crosss are arranged, one of them newel, and four side columns are parallel to each other between 5 pillars; 5 pillars constitute flux circuit through cruciform member; Side column I, side column II, side column III, side column IV sectional area equate that side column I, side column II area sum equal the newel sectional area, and side column III, side column IV sectional area sum equal the newel sectional area; The center pillar is provided with AC coil L1, AC coil L2; Side column I is provided with AC coil L3, dc coil L5; Side column II is provided with coil and exchanges L4, dc coil L6; Side column III is provided with dc coil L7; Side column IV is provided with dc coil L8; Two terminals of AC coil L2 are continuous controllable transformer alternating lead-out terminal;
The end of the same name of dc coil L5 is connected with the end of the same name of dc coil L6, and the different name end of dc coil L5 and the different name end of dc coil L6 are respectively direct current input terminal I and direct current input terminal II; The end of the same name of dc coil L7 is connected with the end of the same name of dc coil L8, and the different name end of dc coil L7 and the different name end of dc coil L8 are respectively direct current input terminal III and direct current input terminal IV;
Ac control power supply I is connected to the first full bridge rectifier input through a pair of thyristor D5, the thyristor D6 of reverse parallel connection; This full bridge rectifier output connects direct current input terminal I and direct current input terminal II; And the formation closed-loop path, thyristor D5, thyristor D6 are connected with correspondent control circuits I; Ac control power supply II is connected to the second full bridge rectifier input through another of reverse parallel connection to thyristor D11, thyristor D12; This full bridge rectifier output connects direct current input terminal III and direct current input terminal IV; And the formation closed-loop path, thyristor D11, thyristor D12 are connected with correspondent control circuits II.
The end of the same name of said AC coil L1 is continuous controllable transformer input terminal I; The different name end of AC coil L1 is connected with the end of the same name of AC coil L3, and the different name end of AC coil L3 is connected with the end of the same name of AC coil L4, and the different name end of AC coil L4 is the continuous controllable transformer input terminal II of AC power.
The equal turn numbers of said AC coil L3 and AC coil L4, the equal turn numbers of dc coil L5 and dc coil L6; The equal turn numbers of dc coil L7 and dc coil L8; The number of turn of AC coil L1 should satisfy: when adding rated voltage at AC coil L two ends, the newel iron core is unsaturated.
The direct current flux that said dc coil L5 and dc coil L6 produce is the closed flux circuit circulation between side column I and side column II only, can not flow to the iron core of newel and other side columns; The direct current flux that dc coil L7 and dc coil L8 produce is the closed flux circuit circulation between side column III and side column IV only, can not flow to the iron core of newel and other side columns.
Two outputs of said control circuit I connect the thyristor D5 of reverse parallel connection and the trigger end of thyristor D6 respectively; The conducting amount of control circuit I continuous control thyristor D5 and thyristor D6, thereby the size of continuous control dc coil L5 and dc coil L6 direct current;
Two outputs of said control circuit II connect the thyristor D11 of reverse parallel connection and the trigger end of thyristor D12 respectively; The conducting amount of control circuit II continuous control thyristor D11 and thyristor D12, thereby the size of continuous control dc coil L7 and dc coil L8 direct current.
The output shunt capacitance C1 of said first full bridge rectifier and overvoltage crowbar I; Said second full bridge rectifier output shunt capacitance C2 and the overvoltage crowbar II.
The invention has the beneficial effects as follows: continuous controllable transformer output voltage adjustable range is bigger, and reaction speed is fast, and voltage is adjustable continuously.Continuous controllable transformer internal reactance is less, and the variation of output voltage receives the variable effect of load current less.
Embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is further specified.
Embodiment 1:
A kind of topological structure and connected mode of continuous controllable transformer are as shown in Figure 1.Fig. 2 a is the front view of the main body iron core of continuous controllable transformer; Fig. 2 b is the end view of the main body iron core of continuous controllable transformer; Fig. 2 c is the vertical view of the main body iron core of continuous controllable transformer.The continuous controllable transformer core has 5 pillars, a newel, and four side columns are parallel to each other between 5 pillars, are cross arrangement; 5 pillar two have cruciform member to constitute flux circuit, and the crossbeam of side column I, newel, side column II is on a bar straight line, and the crossbeam of side column III, newel, side column IV is on another straight line, and two straight lines are vertical each other in the newel axle center; Side column I, side column II be respectively in the newel both sides, and with the newel bilateral symmetry; Side column III, side column IV be respectively in newel both sides in addition, and with the newel bilateral symmetry; Side column I, side column II, side column III, side column IV sectional area equate that side column I, side column II sectional area sum equal the newel sectional area, and side column III, side column IV sectional area sum equal newel sectional area (being that each side column area is the newel half of the area); The center pillar has AC coil L1, and AC coil L2, side column I have AC coil L3, dc coil L5, and side column II has coil to exchange L4, dc coil L6, and side column III has dc coil L7, and side column IV has dc coil L8; Two terminals of AC coil L2 are continuous controllable transformer output terminal I3 and continuous controllable transformer output terminal II4.
The end of the same name of said AC coil L1 is a continuous controllable transformer input terminal I1 of AC power; The different name end of AC coil L1 is connected with the end of the same name of AC coil L3, and the different name end of AC coil L3 is connected with the end of the same name of AC coil L4, and the different name end of AC coil L4 is another continuous controllable transformer input terminal II2 of AC power.The number of turn of AC coil L1 should satisfy: when adding rated voltage at AC coil L1 two ends, the newel iron core is unsaturated.
The end of the same name of dc coil L5 is connected with the end of the same name of dc coil L6, and the different name end of dc coil L5 and the different name end of dc coil L6 are respectively direct current input terminal I5 and direct current input terminal II6; The end of the same name of dc coil L7 is connected with the end of the same name of dc coil L8, and the different name end of dc coil L7 and the different name end of dc coil L8 are respectively direct current input terminal III7 and direct current input terminal IV8;
Ac control power supply I11 is connected to the first full bridge rectifier input through a pair of thyristor D5, the thyristor D6 of reverse parallel connection; This full bridge rectifier output connects direct current input terminal I5 and direct current input terminal II6; And the formation closed-loop path, thyristor D5, thyristor D6 also are connected with correspondent control circuits I12; Ac control power supply II14 is connected to the second full bridge rectifier input through another of reverse parallel connection to thyristor D11, D thyristor 12; This full bridge rectifier output connects direct current input terminal III7 and direct current input terminal IV; And the formation closed-loop path, thyristor D11, thyristor D12 also are connected with correspondent control circuits II15
Side column I and side column II are for the newel symmetry, so side column I equates the equal turn numbers of said AC coil L3 and AC coil L4, the equal turn numbers of dc coil L5 and dc coil L6 with the exchange flux of side column II; The exchange flux of two side columns is at the alternating voltage equal and opposite in direction of dc coil L5 and dc coil L6 generation, and is in the opposite direction.Alternating current impression electromotive force on the continuous controllable transformer dc coil can not exert an influence to dc coil L5 and dc coil L6 DC loop.When dc coil L5 and dc coil L6 inflow direct current, the direct current flux that said dc coil L5 and dc coil L6 produce is the closed flux circuit circulation between side column I and side column II only, can not flow in newel and other side columns.
Side column III and side column IV are for the newel symmetry, so side column III equates the equal turn numbers of dc coil L7 and dc coil L8 with the exchange flux of side column IV; The exchange flux of two side columns is at the alternating voltage equal and opposite in direction of dc coil L7 and dc coil L8 generation, and is in the opposite direction.Alternating current impression electromotive force on the continuous controllable transformer dc coil can not exert an influence to dc coil L7 and dc coil L8 DC loop.When dc coil L7 and dc coil L8 inflow direct current, the direct current flux that said dc coil L7 and dc coil L8 produce is the closed flux circuit circulation between side column III and side column IV only, can not flow to the iron core of newel and other side columns.
When continuous controllable transformer dc coil L5 and dc coil L6 electric current are zero, and dc coil L7 is maximum with dc coil L8 electric current, when the side column III and the side column IV degree of depth are saturated, and the alternating voltage U that the continuous controllable transformer is imported
NBe added on AC coil L1, AC coil L3, the AC coil L4.Exciting current i
μFlow through AC coil L1, AC coil L3 and AC coil L5.AC coil L1 flows back to from side column I and side column II respectively at the magnetic flux that newel produces, and can not flow into side column III and side column IV.The sectional area of each side column is the half the of newel, the logical coil turn that waits, and alternating voltage reduces half the.The wired circle L2 of said continuous controllable transformer core center pillar, two terminals of AC coil L2 are continuous controllable transformer alternating lead-out terminal.Output voltage U=U of AC coil L2
N* N2/ (N1+N3)=nU
NThe minimum no-load voltage ratio n=N2/ (N1+N3) of continuous controllable transformer wherein.
If dc coil L5 and dc coil L6 direct current are enough big, the side column I and the side column II degree of depth are saturated; Dc coil L7 and dc coil L8 electric current are zero.The alternating voltage U of continuous controllable transformer input
NBe added on AC coil L1, AC coil L3, the AC coil L4 exciting current i
μFlow through AC coil L1, AC coil L3 and AC coil L4.Because the continuous controllable transformer side column I and the side column II degree of depth are saturated, AC coil L1 does not flow back to from side column I and side column II at the magnetic flux that newel produces, but flows into side column III and side column IV, returns from side column III and side column IV.Because the continuous controllable transformer side column I and the side column II degree of depth are saturated, the exchange flux of AC coil L3 and AC coil L4 is very little, and the alternating voltage of AC coil L3 and AC coil L4 is very little, the alternating voltage U of continuous controllable transformer input
NAlmost all be added on the AC coil L1.The wired circle L2 of said continuous controllable transformer core center pillar, two terminals of AC coil L2 are continuous controllable transformer alternating lead-out terminal.Output voltage U=U of AC coil L2
N* N2/N1=mU
N, the maximum no-load voltage ratio m=N2/N1 of continuous controllable transformer wherein.
When ac control power supply I11 is voltage source; Ac control power supply I11 connects and is connected the input of the full bridge rectifier that is made up of diode D1, diode D2, diode D3, diode D4 behind thyristor D5 and the thyristor D6 of a pair of reverse parallel connection; The output of full bridge rectifier connects direct current input terminal I5 and direct current input terminal II6, forms the closed-loop path; As shown in Figure 1.
When ac control power supply I11 is current source; The input that is connected the full bridge rectifier that constitutes by diode D1, diode D2, diode D3, diode D4 behind the thyristor D5 of a pair of reverse parallel connection of ac control power supply I11 parallel connection and the thyristor D6; The output of full bridge rectifier connects direct current input terminal I5 and direct current input terminal II6, forms the closed-loop path.
The output shunt capacitance C1 of said first full bridge rectifier and overvoltage crowbar I; Said second full bridge rectifier output shunt capacitance C2 and the overvoltage crowbar II.Can make direct current more steady, and absorb impulse disturbances voltage, the protection rectification circuit.
Control circuit I12, its two outputs connect the thyristor D5 of two reverse parallel connections, the trigger end of thyristor D6 respectively.Thyristor D5 and thyristor D6 two ends are power-frequency voltage; Control circuit I12 can be from 0 ° to 180 ° the conducting amount of scope continuous control two thyristors; The trigger angle of thyristor D5 and thyristor D6 hour, the conducting amount of thyristor D5 and thyristor D6 is big; When the trigger angle of thyristor D5 and thyristor D6 was big, the conducting amount of thyristor D5 and thyristor D6 was little.The conducting amount of control circuit I12 continuous control thyristor D5 and thyristor D6 can continuous control dc coil L5 and the size of dc coil L6 direct current.
In like manner, control circuit II14 can according to the identical mode of aforesaid way, through the conducting amount of control thyristor D11, thyristor D12, thus the size of continuous control dc coil L7 and dc coil L8 direct current.
Disconnected when triggering thyristor D5 and the thyristor D6 complete shut-down of control circuit I12, the direct current of dc coil L3 and dc coil L4 is zero; Dc coil L3 and dc coil L4 place iron core are unsaturated; When triggering thyristor D11 and the full conducting of thyristor D12 of control circuit II15, the direct current of dc coil L7 and dc coil L8 is maximum; The dc coil L7 and the dc coil L8 place iron core degree of depth are saturated; The output voltage of AC coil L2 is a continuous controllable transformer minimum value.
When control circuit I12 and control circuit II15 progressively changed the trigger angle of each thyristor, thyristor D5 and thyristor D6 progressively strengthened the conducting amount, and direct current strengthens gradually among dc coil L3 and the dc coil L4; Thyristor D11 and thyristor D12 progressively reduce the conducting amount, and direct current reduces gradually among dc coil L7 and the dc coil L8; The output voltage of AC coil L2 strengthens gradually.
When control circuit I12 triggering thyristor D5 and the full conducting of thyristor D6, dc coil L3 and dc coil L4 flow through the maximum direct current of design; The dc coil L3 and the dc coil L4 place iron core degree of depth are saturated; When triggering thyristor D11 and the thyristor D12 contract fully of control circuit II15, the direct current of dc coil L7 and dc coil L8 is zero; Dc coil L7 and dc coil L8 place iron core are unsaturated; The exchange flux that AC coil L1 produces flows to side column I and side column II seldom, all flows into side column III and side column IV.The output voltage of AC coil L2 is a continuous controllable transformer maximum.
The input port and the output port of continuous controllable transformer are exchanged, and also are operable.
Be divided into two equal coils to AC coil L2 and be installed in respectively on side column I and the side column II, two coils can be connected, also can be parallelly connected; The continuous controllable transformer also is operable.
Be divided into two equal coils to AC coil L2 and be installed in respectively on side column III and the side column IV, two coils can be connected, also can be parallelly connected; The continuous controllable transformer also is operable.
The manufacturing of continuous controllable transformer core for ease, the continuous controllable transformer core also can adopt structure shown in Figure 3.
Embodiment 2:
In the present embodiment, there is the number of turn of AC coil L1 to equal the number of turn of AC coil L3.
When continuous controllable transformer dc coil L5 and dc coil L6 electric current are zero, and dc coil L7 is when also being zero with dc coil L8 electric current.The output voltage of AC coil L2 is zero.
When continuous controllable transformer dc coil L5 and dc coil L6 electric current are zero, and the increase of starting from scratch of dc coil L7 and dc coil L8 electric current.The output voltage of AC coil L2 increases to the half the of maximum output voltage from zero.
When continuous controllable transformer dc coil L5 and dc coil L6 electric current reduce to zero gradually from maximum; And simultaneously; The electric current of dc coil L5 and dc coil L6 is when zero increases to maximum gradually, and the output voltage of AC coil L2 increases to maximum output voltage gradually from half of maximum output voltage.
The continuous controllable transformer can be realized flexible clutch function, can realize the short circuit current limiter function.
The present invention can manufacture and design with prior art, can realize fully.Broad prospect of application is arranged.