CN2271067Y - Outer bridge self-exciting starting thyristor parallel inverter - Google Patents
Outer bridge self-exciting starting thyristor parallel inverter Download PDFInfo
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- CN2271067Y CN2271067Y CN 96203919 CN96203919U CN2271067Y CN 2271067 Y CN2271067 Y CN 2271067Y CN 96203919 CN96203919 CN 96203919 CN 96203919 U CN96203919 U CN 96203919U CN 2271067 Y CN2271067 Y CN 2271067Y
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- thyristor
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Abstract
The utility model relates to an outer bridge self-exciting starting thyristor parallel inverting power supply unit, which is composed of a three-phase rectification circuit of full control 1, a smoothing reactor filter circuit 2, an outer bridge 3, an inner bridge 4, a parallel resonance load circuit 5 and an inversion starting control circuit 6. The working harmonic waves of the three-phase rectification circuit of full control are taken as an initial trigger signal. The thyristors of the outer bridge and the inner bridge are separately triggered by a switching circuit. A self-excitation signal is generated through a load circuit, causing the inversion starting control circuit to enter self-actuated control. When starting, the three-phase rectifying voltage and current and the load voltage and current are all slowly enlarged from zero. A separate excitation signal is not adopted as a trigger source. The utility model is especially suitable for starting the power supply of a thyristor with large power, high frequency and parallel inversion.
Description
The utility model relates to the device that the AC power input becomes AC power output, particularly uses the thyristor inverter circuit to change the device of voltage and frequency.
In the background technology field, adopt the characteristics of the thyristor parallel inverter of outer bridge startup to be: the triggering signal of inverter thyristor is produced by its energizing signal source that is provided with in the control circuit earlier during startup, during operate as normal, by the electric current in the inversion load, the synthetic self-excitation signal source of voltage signal is as triggering signal, and the switching of two signals and rectifier bridge power output is complete by strict sequential, phase relation by specialized circuitry.Therefore its circuit complexity is debugged and maintenance difficult, uses still unsatisfactory in production practices.
The purpose of this utility model is: the induced signal that adopts the work harmonic wave in the three-phase full wave rectifier circuit, as the initial triggering signal of inverter thyristor, thereby the thyristor parallel inverter of the outer bridge self-exciting starting of design can overcome existing problem in the background technology.
The technical solution adopted in the utility model is: it comprises three phase controlled rectifier circuit, the smoothing reactor filter circuit, outer bridge start-up circuit (being called for short outer bridge), single-phase bridge inverter circuit (bridge in being called for short), the parallel resonance load circuit reaches by self-excited pulse waveshaping circuit (be called for short and form circuit), the inversion start-up control circuit that self-excited pulse commutation circuit (abbreviation commutation circuit) and self-excited pulse power amplification circuit (abbreviation amplifying circuit) are formed.The input that forms circuit connects current transformer secondary output end in the parallel resonance load circuit and one group of secondary output end of voltage transformer respectively; Two outputs that form circuit all connect amplifying circuit and commutation circuit respectively, another group secondary winding output termination commutation circuit of voltage transformer in the parallel resonance load circuit.
When starting beginning, parallel resonance load circuit and signal circuit thereof are in the high resistant suspended state, this moment, the work harmonic wave of three phase controlled rectifier circuit disturbed the initial inversion trigger impulse of generation to forming circuit, by commutation circuit control, touched a pair of thyristor (T of logical Wai Qiao and interior bridge respectively
1, T
6) or (T
2, T
5), make the Resistor-Capacitor Unit C of rectifier bridge electric current through outer bridge series connection
S, R
sEnter the parallel resonance load circuit and produce the electric current I of vibration
H, voltage U
HThereby, make the inverter signal system break away from suspended state, produce self-excitation signal and make inversion start-up control circuit enter self-excitation control, three-phase full-controlled rectifier bridge constantly provides energy to load circuit, voltage U in load circuit through outer bridge simultaneously
HWhen rising to a set point, commutation circuit is closed thyristor T in the outer bridge
1, T
2Trigger impulse, the thyristor T in the bridge simultaneously inwardly
3, T
4Trigger impulse is provided, finishes the switching of outer bridge to interior bridge, so far start-up course finishes, and power supply enters normal operating conditions.
The utility model is compared with background technology, and the useful effect that is had is:
1. three phase rectifier voltage U when starting
d, electric current I
d, load current I
H, voltage U
HAll slowly increase from null value, safety, reliable has been saved power setting and commutation circuit;
2. do not adopt its energizing signal when starting, saved signal switching circuit and sequential thereof, phase sequence measuring circuit, reduce cost, debugging is simple, and is easy to maintenance.
Therefore, it can be at equipment such as melting, through heating, heat treatments, particularly promotes the use of in the startup of high-power, high frequency parallel inverter thyristor power source.
Below in conjunction with accompanying drawing, provide details of the present utility model by description to embodiment.
Fig. 1, structured flowchart of the present utility model;
Fig. 2, major loop structure schematic diagram of the present utility model;
Fig. 3, inversion start-up control structured flowchart of the present utility model;
Formation circuit structure schematic diagram in Fig. 4, the inversion start-up control circuit;
Commutation circuit structure principle chart in Fig. 5, the inversion start-up control circuit;
Amplification circuit structure schematic diagram in Fig. 6, the inversion start-up control circuit.
As Fig. 1, Fig. 2, shown in Figure 3, it comprises three phase controlled rectifier circuit 1 this device, smoothing reactor filter circuit 2, outer bridge start-up circuit 3, single-phase bridge inverter circuit 4, parallel resonance load circuit 5 reaches in parallel resonance load circuit 5 backs by forming circuit 6.1, commutation circuit 6.2, the inversion start-up control circuit 6 that amplifying circuit 6.3 is formed.As shown in Figure 4, the input that forms circuit 6.1 connects current transformer LM secondary output end 46,221 in the parallel resonance load circuit 5 and one group of secondary output end 46,47 of voltage transformer BH respectively.Form the start pulse signal V of 180 ° of circuit 6.1 output mutual deviations
A, V
B, V
AThe PT.5 of output one termination amplifying circuit 6.3 is (in order to T in the bridge 4 in providing
5Trigger impulse), another termination commutation circuit 6.2; V
BThe PT.6 of output one termination amplifying circuit 6.3 is (in order to T in the bridge 4 in providing
6Trigger impulse), another termination commutation circuit 6.2; Another group secondary winding output 48,49 of voltage transformer BH connects commutation circuit 6.2 in the parallel resonance load circuit 5, and voltage signal U is provided
HSThe output of commutation circuit 6.2 divides 4 the tunnel to be connected respectively to PT.2, PT.4, PT.3, PT.1 in the amplifying circuit 6.3 (PT.1～PT.6 is respectively thyristor T
1～T
6Trigger impulse power amplification and buffer circuit).
As shown in Figure 5, the signal U that exports by the secondary winding output 48,49 of voltage transformer BH in the parallel resonance load circuit 5
HSRectification, filtering, voltage-stabiliser tube DW through commutation circuit 6.2
1Voltage stabilizing meets thyristor T
7The control utmost point of (single-phase silicon-controlled SCR), thyristor T
7Anode respectively through resistance R
10Meet reset button K and meet integrated circuit inverter U
3E(U
3Be integrated circuit inverter 40106), integrated circuit NAND gate U
4A(U
4Be integrated circuit NAND gate 4093) 3 pin through integrated circuit inverter U
3A1,2 pin, U
4B4 pin through U
3B3,4 pin, U
4C11 pin through U
3C5,6 pin, U
4D10 pin through U
3D9,8 pin meet PT.4 in the amplifying circuit 6.3, PT.2, PT.3, PT.1, U respectively
4D8 pin meet U
4B6 pin and meet U
3E10 pin, U
4C12 pin meet U
4D9 pin after receive the V that forms circuit 6.1
BOutput, U
4B5 pin meet U
4A2 pin after receive the V that forms circuit 6.1
AOutput, U
4A1 pin meet U
4C13 pin after receive U
3EOutput; As shown in Figure 6, (PT.1～PT.6) it comprises the PT in the amplifying circuit 6.3: resistance R
11With capacitor C
6Be in series and receive power MOS pipe V
40Grid, voltage-stabiliser tube DW
2With resistance R
12Phase also is connected across V
40Grid and source electrode between, V
40Source electrode connect power supply ground, diode D
13With resistance R
13Mutually the string after respectively with pulse transformer B
2Former limit winding and V
40Drain electrode and amplifier power supply V
PAnodal continuous, diode D
14With capacitor C
7Phase is also received the pulse transformer secondary, and the two ends of pulse transformer secondary connect the control utmost point and the negative electrode of thyristor respectively.
During startup, voltage U in the parallel resonance load circuit 5
HBe zero, U
HSAlso be zero, the voltage-stabiliser tube DW among Fig. 5
1, one-way SCR T
7Be in cut-off state, integrated circuit inverter U
3EOutput low level, U
3A, U
3COutput therefore be locked in low level, thereby make the thyristor T in the interior bridge 4 of Fig. 2
3, T
4Pulse-triggered amplifying circuit 6.3 in PT.3, PT.4 be in the state of being blocked, T under this state
3, T
4Because of there not being trigger impulse to be in cut-off state.After starting beginning, because the harmonic wave electromagnetic radiation that the work of rectifier bridge thyristor produces makes formation circuit 6.1 produce initial self-excited pulse signal V
AO, V
BO, because this harmonic wave induced voltage amplitude is very little, so integrated circuit inverter U
3EState is constant, and PT.3, PT.4 still are blocked, and has only PT.1, PT.2, PT.5, PT.6 power amplifier to obtain self-excited pulse signal V
AO, V
BO, the thyristor element of therefore participating in the work of inverse transformation during this period is T
1, T
2, T
5, T
6, the rectifier bridge energy passes through thyristor T through Ld
1(or T
3), the series element capacitor C
S, resistance R
s, thyristor T
6(or T
5) provide energy to load circuit 5, be in outer bridge operating state this moment.Along with the raising of rectifier bridge voltage U d, i in the load circuit 5
H, U
HAlso constantly increase, current transformer LM, voltage transformer BH break away from suspended state, and carry signal that formation circuit 6.1 is produced and i to forming circuit 6.1
H, U
HSynchronous self-excitation signal V
A, V
B, this shows that triggering synchronous process of the present utility model is that nature is finished, and works as U
HWhen being increased to a set point, the voltage-stabiliser tube DW among Fig. 5
1Puncture conducting, thyristor T
7Conducting makes integrated circuit inverter U
3EThe output high level, U
3A, U
3CLift a blockade U
3B, U
3DOutput then be locked into low level and make thyristor T in the outer bridge 3
1, T
2Lose trigger impulse and enter blocking state.The thyristor that participate in inversion work this moment is T
3, T
4, T
5, T
6, outer bridge thyristor T
1, T
2Deactivate and be in blocking state, capacitor C
S, resistance R
SMiddle electric current, voltage all is reduced to null value, and power supply finishes start-up course, enters normal operating conditions.
In the whole startup course of work, the operating state of interior bridge 4, outer bridge 3 is according to voltage U in the interior bridge 4 by commutation circuit 6.2 during startup
HMean value switch and and U
HInstantaneous phase irrelevant, the source of pulse triggering signal itself does not change in the handoff procedure, all is by the self-excitation signal that forms circuit 6.1 generations.I in the start-up course
d, U
d, I
H, U
HAll steadily rise by Zhejiang from null value, the impact of sudden change is not a kind of startup method of handy and safe.
Claims (2)
1. the thyristor parallel inverter of an outer bridge self-exciting starting, it comprises three phase controlled rectifier circuit [1], smoothing reactor filter circuit [2], outer bridge start-up circuit [3], single-phase bridge inverter circuit [4], parallel resonance load circuit [5], feature of the present utility model is: back by forming circuit [6.1] at parallel resonance load circuit [5], commutation circuit [6.2], the inversion start-up control circuit [6] that amplifying circuit [6.3] is formed, the input of formation circuit [6.1] connects the current transformer LM secondary output end 46 in the parallel resonance load circuit [5] respectively, 221 and one group of secondary output end 46 of voltage transformer BH, 47; Form the V of circuit [6.1]
AThe PT.5 of output one termination amplifying circuit [6.3], another termination commutation circuit [6.2]; Form the V of circuit [6.1]
BThe PT.6 of output one termination amplifying circuit [6.3], another termination commutation circuit [6.2]; Another group secondary winding output 48,49 of voltage transformer BH connects commutation circuit [6.2] in the parallel resonance load circuit [5].
2. the thyristor parallel inverter of outer bridge self-exciting starting according to claim 1 is characterized in that: by 48,49 rectifications through commutation circuit [6.2] of secondary winding output, filtering, the voltage-stabiliser tube DW of voltage transformer BH in the parallel resonance load circuit [5]
1Voltage stabilizing meets thyristor T
7The control utmost point, thyristor T
7Anode respectively through resistance R
10Meet reset button K and meet integrated circuit inverter U
3E, integrated circuit NAND gate U
4A3 pin through integrated circuit inverter U
3A1,2 pin; U
4B4 pin through U
3B3,4 pin, U
4C11 pin through U
3C5,6 pin, U
4D10 pin through U
3D9,8 pin meet PT.4 in the amplifying circuit [6.3], PT.2, PT.3, PT.1, U respectively
4D8 pin meet U
4B6 pin and meet U
3E10 pin, U
4C12 pin meet U
4D9 pin after receive the V that forms circuit [6.1]
BOutput, U
4B5 pin meet U
4A2 pin after receive the V that forms circuit [6.1]
AOutput, U
4A1 pin meet U
4C13 pin after receive U
3EOutput; (PT.1～PT.6) it comprises resistance R to PT in the amplifying circuit [6.3]
11With capacitor C
6Be in series and receive power MOS pipe V
40Grid, voltage-stabiliser tube DW
2With resistance R
12Phase also is connected across V
40Grid and source electrode between, V
40Source electrode meet power supply ground diode D
13With resistance R
13Mutually the string after respectively with pulse transformer B
2Former limit winding and V
40Drain electrode and amplifier power supply V
PAnodal continuous, diode D
14With capacitor C
7Phase is also received the pulse transformer secondary, and the two ends of pulse transformer secondary connect the control utmost point and the negative electrode of thyristor respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96203919 CN2271067Y (en) | 1996-01-26 | 1996-01-26 | Outer bridge self-exciting starting thyristor parallel inverter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96203919 CN2271067Y (en) | 1996-01-26 | 1996-01-26 | Outer bridge self-exciting starting thyristor parallel inverter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2271067Y true CN2271067Y (en) | 1997-12-17 |
Family
ID=33889363
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 96203919 Expired - Fee Related CN2271067Y (en) | 1996-01-26 | 1996-01-26 | Outer bridge self-exciting starting thyristor parallel inverter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2271067Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109375560A (en) * | 2018-12-14 | 2019-02-22 | 二三电器（上海）有限公司 | Split type intelligent controller |
-
1996
- 1996-01-26 CN CN 96203919 patent/CN2271067Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109375560A (en) * | 2018-12-14 | 2019-02-22 | 二三电器（上海）有限公司 | Split type intelligent controller |
| CN109375560B (en) * | 2018-12-14 | 2023-10-20 | 二一三电器(上海)有限公司 | Split intelligent controller |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |