CN201142571Y - SCR active inverter with 'inversion failure' fault protection - Google Patents
SCR active inverter with 'inversion failure' fault protection Download PDFInfo
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- CN201142571Y CN201142571Y CNU2007200756300U CN200720075630U CN201142571Y CN 201142571 Y CN201142571 Y CN 201142571Y CN U2007200756300 U CNU2007200756300 U CN U2007200756300U CN 200720075630 U CN200720075630 U CN 200720075630U CN 201142571 Y CN201142571 Y CN 201142571Y
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Abstract
A SCR active inverter with the inverse subversion failure protection is a system which is composed of a rapid cut-off switch, a DC reactor, a SCR inverter and a drive control circuit; the SCR active inverter can be used in an internal feedback chopper speed regulator of a high-power motor for completely eliminating the problem of damaging elements during the inverse subversion and ensuring the rapid protection of the SCR active inverter when in inverse subversion due to the interferences and the recovery of the work after being protected, thus ensuring the continuous operation of the inverter.
Description
Affiliated technical field
The utility model relates to a kind of SCR active inverter with " inversion is overturned " error protection; it is the system that is made of together fast shut-off switch, direct current reactor, SCR inverter, Drive and Control Circuit; can be used in the internal feedback chopper speed regulating device of high power motor, belong to the environmental protection and energy saving field.
Background technology
At present, in the internal feedback chopper speed regulating device, adopt the active inverter of forming by SCR mostly.The structure of the active inverter of known SCR is by direct current reactor, SCR element, combines through suitably connecting.The SCR active inverter is used for the internal feedback chopper speed regulating device, and its effect is the direct current energy of input to be remapped output to an additional winding of motor for AC energy, thereby reaches the purpose of energy recuperation.But, with the active inverter that the SCR element is made, the problem of intrinsic " inversion is overturned ", when " inversion is overturned ", the SCR element flows through big electric current, causes the damage of SCR and other element, so reliability is low, harm is big, is the greatest problem of SCR active inverter.
Summary of the invention
In order to overcome the harm that existing intrinsic " inversion is overturned " of SCR active inverter caused; the SCR active inverter that the utility model provides a kind of and has " inversion is overturned " error protection, it is made up of fast shut-off switch (being made of IGBT element and other element), direct current reactor, SCR active inverter and drive circuit.
The technical scheme that its technical problem that solves the utility model adopts is: the air channel that a cooling usefulness is installed in the metal cabinet, aluminium radiator is installed in the air channel, surface at a module radiator, except the SCR element that inverter is installed, (rectifier element is also on this radiator) installs an IGBT switch and relevant element thereof.Behind (+) utmost point process direct current reactor of direct current input, the transducer, be connected with the collector electrode of IGBT, the emitter of IGBT is connected with input (+) utmost point of SCR inverter, (-) utmost point input of SCR inverter is connected with (-) utmost point of DC power supply, and the drive circuit of IGBT switch has a quick overcurrent to detect and surge absorbing circuit.When " inversion is overturned ", inverter flows through big electric current and is detected by overcurrent sensing circuit, controls IGBT switch disengagement failure electric current then and continues to close 1 second, has so just protected SCR and other element to avoid damaging.In addition, when IGBT turn-offs, between its collector electrode and emitter, certainly lead to surge, surge is absorbed, play the effect of protection IGBT by absorbing circuit.
Effect of the present utility model is; damage element problem when having eliminated " inversion is overturned " fully; can guarantee that the SCR active inverter is protected rapidly when " inversion is overturned " being interfered, after protected 1 second, resume work automatically, guarantee the continuous operation of inverter.
Description of drawings
The utility model is described in further detail below in conjunction with drawings and Examples.
Fig. 1 is a main circuit schematic diagram of the present utility model.
Fig. 2 is a drive circuit schematic diagram of the present utility model.
Fig. 3 is the structure front elevation of the utility model embodiment.
Among the figure: (1). direct-flow input end, (2). current sensor, (3). absorption capacitor (941C12W1K), (4). resistance (75 ohm/50W), and (5) .IGBT element (FD800R1700K), (6). absorption capacitor, (7). drive circuit PCB (printed substrate), (8). direct current reactor (2mH), (9). inverter (MTC800/24 silicon controlled module), (10). inverter output end
Embodiment
In Fig. 1, one end of direct current reactor (8) is connected to input terminal, the collector electrode of the other end of direct current reactor (8) and IGBT (5), the anode of diode (being included in the IGBT module), one end of resistance (4) connects, the negative electrode of diode is connected with the other end of resistance (4) and (+) utmost point of absorption electric capacity (6), the emitter of IGBT, absorb the negative electrode of electric capacity (6), (+) utmost point input of SCR inverter is electrically connected, absorb between the negative electrode that electric capacity (3) is connected the emitter of IGBT and diode, (-) utmost point input of SCR inverter is electrically connected with input terminal (1), the control utmost point of every SCR element of inverter (9) and negative electrode successively with the connector A2 of drive circuit (7) PCB, A3 is electrically connected.The collector electrode of IGBT, grid, emitter are connected with the A4 connector of drive circuit (7) PCB, and the output of transducer is connected with the A1 connector of drive circuit (7) PCB, and the output of inverter is connected to terminal (10).The capacitance that absorbs electric capacity (6) is calculated as follows: C=L * (I ÷ U)
2* 10
3(microfarad), in the formula: I-inverter maximum functional direct current, U-inverter input direct voltage maximum, the inductance value mH of L-direct current reactor (8), the rated voltage of capacitor is got inverter input direct voltage peaked 80%.
In Fig. 2,1 of the connector A1 of drive circuit PCB (7), 2,3 are connected with external sync voltage, 1 of A1,2,3 respectively with resistance R 50, R51, R52, potentiometer RP1, RP2, RP3, resistance R 53, R54, R55 series connection back and 1 of U1,2,18 pin connect, the drive signal of inverter is produced by integrated circuit U1, the model of U1 is TC787A, 13 of U1,14,15,16 pin pass through capacitor C 16 respectively, C17, C18, C19 ground connection, 17 of U1,3 pin respectively with power supply just, negative pole connects, 12 of U1,10,8,9,7,11 pin pass through resistance R 2 respectively, R4, R5, R6, R7, R8 receives transistor Q1, Q2, Q3, Q4, Q5, Q6 (model: base stage IRF350), transistor Q1, Q2, Q3, Q4, Q5, the collector electrode of Q6 and pulse transformer T1, T2, T3, T4, T5, T6 connects, pulse transformer T1, T2, T3, T4, T5, the secondary of T6 is through diode-resistor network, connector A2, A3 is electrically connected with the control utmost point of 6 SCR elements of inverter (9) successively.The drive signal of fast shut-off switch I GBT is produced by integrated circuit U6 (model HCPL-316J), and 14,11,16 pin of U6 are electrically connected with collector electrode, grid, the emitter of IGBT (5) successively through 1,3,5 pin of R59, D26 and R61, connector A4.6,7,8 pin of connector A4 are connected with 0V end, (-) 5V end, (+) 15V end of isolated DC power supply successively.6,7,11 pin of connector A1 are connected with external control power supply (+) 15V, (+) 24V, GND successively.9,10 pin of connector A1 are the output of fault signal, are connected with the input terminal of outside PLC, and 5,12 pin of connector A1 are connected with the lead-out terminal of outside PLC, as the input of external control.The output line of current sensor (2) is connected with 8,12 pin of connector A1, be connected to 2 pin of U5 through resistance R 13, R12, R10, the detection of overcurrent is realized by integrated circuit U5 (model LM393), and the 1 pin output overcurrent signal of U5 is connected with 1 pin of U3 through resistance R 19-C22 network.5,6 pin of U5 are connected with the network that resistance R 15, R16, R18 capacitor C 11, C21 form, and 7 pin of U5 are connected with 6 pin of pull-up resistor R20, U3.10,11 pin of U3 are connected with 2,6,8,12 pin of U2, and 3,4,10,11 pin of U2 are connected with 5 pin of U1, block the signal output of U1 during overcurrent.10,11 pin of U3 are connected with No. 1 pin of U7 through resistor network R65, R66, and No. 2 pin of U7 are connected with resistance capacitance R67 (2M Ω), C37 (0.1uf), D27 network, and 8,10,12 of U7 is connected with No. 1 pin of U6 makes U6 obtain drive signal.4 pin of U7 are connected with 5 pin of U7 through capacitor C 38 (0.1uf) resistance R 68 (10K) network, and 6 pin of U7 are connected with 5 pin of U6, make U6 obtain a reset pulse.14 pin of U6 are connected with the collector electrode of fast shut-off switch I GBT through resistance R 59, diode D26,6 pin of U6 are connected with the base stage of transistor Q8, the collector electrode of Q8 is connected with the base stage of transistor Q7 through resistance R 63, and the collector electrode of Q7 is connected with 5 pin of connector A1.
In Fig. 3,3 SCR modules (9) (every module contains 2 SCR elements) are installed on fin inserting type heat radiator (11) surface, IGBT module (5), absorb electric capacity (6), transducer (2), resistance (4) and (other rectifier cell), the collector electrode of IGBT element (5) and diode anode all are connected to transducer (2), absorb an end of electric capacity (3), absorb (-) utmost point of electric capacity (6) and the emitter of IGBT, the negative electrode of diode links together, absorb the other end of electric capacity (3), absorb (+) utmost point of electric capacity (6) and the collector electrode of IGBT, the anode of diode links together, the two ends of resistance (4) are connected with the anode and the cathodic electricity of diode respectively, direct current reactor is installed in the bottom of cabinet, one end of direct current reactor is electrically connected with (+) of direct-flow input end by cable, the other end of direct current reactor is electrically connected with the input of transducer by cable, the positive pole of 3 SCR modules (9) of inverter and the emitter of IGBT link together, and the negative pole of 3 SCR modules (9) of inverter and the negative pole of rectifier diode link together.After driving PCB is closed shielding with iron shield, be placed on front near IGBT and SCR element.
Model, the specification of all elements are as follows:
Do not indicate the resistance of power, its power all is 1/4W.
Claims (10)
1. SCR active inverter with " inversion is overturned " error protection; in the metal cabinet; direct current reactor; transducer; the fast shut-off switch; active inverter; drive circuit board is electrically connected in proper order; it is characterized in that: "+" utmost point of input (1) is electrically connected through the end of direct current reactor (8) with transducer (2); the collector electrode of the other end of transducer and fast shut-off switch I GBT (5); diode anode; one end of resistance (4) is electrically connected; the other end of resistance (4); diode cathode is electrically connected with "+" utmost point that absorbs electric capacity (6); absorb "-" utmost point of electric capacity (6); the emitter of IGBT; "+" utmost point input of inverter (9) is electrically connected; the two ends that absorb electric capacity (3) are connected with the emitter of IGBT and the negative electrode of diode respectively; the control utmost point of 6 SCR elements of inverter (9); negative electrode successively with the A2 of drive circuit (7) PCB; the A3 connector connects; "-" utmost point input of inverter (9) is electrically connected with "-" utmost point of input (1), and the output of inverter is (10).
2. the SCR active inverter with " inversion is overturned " error protection according to claim 1 is characterized in that: form active inverter with silicon controlled module, the model of silicon controlled module is MTC800/24.
3. the SCR active inverter with " inversion is overturned " error protection according to claim 1; it is characterized in that: an end of direct current reactor (8) is connected to input terminal; the other end of direct current reactor (8) is connected with the anode of the collector electrode of IGBT (5), diode, an end of resistance (4), and the inductance value of direct current reactor is 2mH.
4. the SCR active inverter with " inversion is overturned " error protection according to claim 1; it is characterized in that: form the fast shut-off switch with the IGBT element; the model of IGBT element is FD800R17K; the anode of the diode among the IGBT is connected with the collector electrode of IGBT; resistance (4) is in parallel with diode; the specification of resistance is 75 ohm/50W; "+" utmost point that absorbs electric capacity (6) is connected with the cathodic electricity of diode; absorb electric capacity (3) and install near the emitter of IGBT and the negative electrode of diode, the model that absorbs electric capacity (3) is 941C12W1K.
5. the SCR active inverter with " inversion is overturned " error protection according to claim 1 is characterized in that: electric capacity (6) adopts electrolytic capacitor, and capacitance is calculated as follows: C=L * (I ÷ U)
2* 10
3Microfarad, I is an inverter maximum functional direct current in the formula, and U is an inverter input direct voltage maximum, and L is the inductance value of direct current reactor (8), and unit is mH, the rated voltage of capacitor is got inverter input direct voltage peaked 80%.
6. the SCR active inverter with " inversion is overturned " error protection according to claim 1; it is characterized in that: the fault current when measuring inverter and " overturn " with transducer (2); the specification of transducer is TKC300EKB, and the output of transducer is connected to 8,12 pin of the A1 connector of drive circuit PCB.
7. the SCR active inverter with " inversion is overturned " error protection according to claim 1; it is characterized in that: the driving pulse that produces SCR with integrated circuit U1; the model of U1 is TC787A; 1 of the connector A1 of drive circuit PCB; 2; 3 pin are connected with external sync voltage; 1 of A1; 2; 3 pin respectively with resistance R 50; R51; R52; potentiometer RP1; RP2; RP3; resistance R 53; R54; R55 series connection back and 1 of U1; 2; 18 pin connect; 13 of U1; 14; 15; 16 pin pass through capacitor C 16 respectively; C17; C18; C19 ground connection; 17 of U1; 3 pin respectively with power supply just; negative pole connects; 12 of U1; 10; 8; 9; 7; 11 pin pass through resistance R 2 respectively; R4; R5; R6; R7; R8 receives transistor Q1; Q2; Q3; Q4; Q5; the base stage of Q6; transistorized model is IRF350; transistor Q1; Q2; Q3; Q4; Q5; the collector electrode of Q6 and pulse transformer T1; T2; T3; T4; T5; T6 connects, pulse transformer T1; T2; T3; T4; T5; the secondary of T6 is through diode-resistor network; connector A2; A3 is electrically connected with the control utmost point of 6 SCR elements of inverter (9) successively.
8. the SCR active inverter with " inversion is overturned " error protection according to claim 1; it is characterized in that: the drive signal of fast shut-off switch I GBT is produced by integrated circuit U6; the model of U6 is HCPL-316J; 1,3,5 pin that 14,11,16 pin process R59, the D26 of U6 and R61 pass through connector A4 respectively are electrically connected with collector electrode, grid, the emitter of IGBT (5) successively, and 6,7,8 pin of connector A4 are connected with 0V end, 5V "-" end, 15V "+" end of isolated DC power supply successively.
9. the SCR active inverter with " inversion is overturned " error protection according to claim 1 is characterized in that: 3,4,10,11 pin of U2 are connected with 5 pin of U1, when " inversion is overturned ", and the output pulse of blocking U1 immediately.
10. the SCR active inverter with " inversion is overturned " error protection according to claim 1; it is characterized in that: 5,6 pin of U5 are connected through the network with resistance R 15, R16, R18 capacitor C 11, C21 composition; 7 pin of U5 are connected with 6 pin of U3, and following elements determines that the time that U1 blocks is 1 second: R15 resistance 10K, R16 resistance 3.9M, R18 resistance 10K, capacitor C 11 capacity 0.1uf, C21 capacity 0.22uf.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200756300U CN201142571Y (en) | 2007-10-22 | 2007-10-22 | SCR active inverter with 'inversion failure' fault protection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200756300U CN201142571Y (en) | 2007-10-22 | 2007-10-22 | SCR active inverter with 'inversion failure' fault protection |
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| Publication Number | Publication Date |
|---|---|
| CN201142571Y true CN201142571Y (en) | 2008-10-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200756300U Expired - Fee Related CN201142571Y (en) | 2007-10-22 | 2007-10-22 | SCR active inverter with 'inversion failure' fault protection |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201142571Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9553443B2 (en) | 2011-12-29 | 2017-01-24 | General Electric Company | Inverter and power system with fuse protection |
| US10128625B2 (en) | 2014-11-18 | 2018-11-13 | General Electric Company | Bus bar and power electronic device with current shaping terminal connector and method of making a terminal connector |
-
2007
- 2007-10-22 CN CNU2007200756300U patent/CN201142571Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9553443B2 (en) | 2011-12-29 | 2017-01-24 | General Electric Company | Inverter and power system with fuse protection |
| US10128625B2 (en) | 2014-11-18 | 2018-11-13 | General Electric Company | Bus bar and power electronic device with current shaping terminal connector and method of making a terminal connector |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| PP01 | Preservation of patent right |
Effective date of registration: 20100607 Granted publication date: 20081029 |
|
| PD01 | Discharge of preservation of patent |
Date of cancellation: 20110907 Granted publication date: 20081029 |
|
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Anhui Huasheng Technology Holdings Co., Ltd. Assignor: Zhao Jinrong Contract record no.: 2012340000222 Denomination of utility model: SCR active inverter with 'inversion failure' fault protection Granted publication date: 20081029 License type: Exclusive License Record date: 20120709 |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20081029 Termination date: 20121022 |