CN103607125A - IGBT rectification circuit and IGBT rectification circuit control method - Google Patents
IGBT rectification circuit and IGBT rectification circuit control method Download PDFInfo
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- CN103607125A CN103607125A CN201310590526.5A CN201310590526A CN103607125A CN 103607125 A CN103607125 A CN 103607125A CN 201310590526 A CN201310590526 A CN 201310590526A CN 103607125 A CN103607125 A CN 103607125A
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Abstract
The invention relates to the technical field of a rectification circuit, and especially relates to an IGBT rectification circuit and a control method thereof. The input end of a current detector A1 is connected with three-phase commercial power; the output end of the current detector A1 is connected with the input end of a three-phase LC filter LC1 through a signal acquisition circuit; the output end of the three-phase LC filter LC1 is connected with the AC side of a three-phase IGBT inversion bridge circuit; the DC side of the three-phase IGBT inversion bridge circuit is connected with a load; one end of an IGBT rectification drive circuit is connected with an IGBT rectification control circuit; the other end of the IGBT rectification drive circuit is connected with pulse signal input end of the three-phase IGBT inversion bridge circuit; and the IGBT rectification control circuit is also respectively connected with the current detector A1 and the signal acquisition circuit. According to the invention, the IGBT rectification circuit is formed by integrating the three-phase LC filter LC1 and the three-phase IGBT inversion bridge circuit thereinto, the output of the rectification circuit is controlled according to current values and voltage values, and only a quite small number of parts are needed for realizing stable DC bus voltage output, so that the structure is simple, the output is stable, the cost is low, the pollution to an electrical network is small, and the circuit and method provided by the invention are safe and effective.
Description
Technical field
The present invention relates to rectification circuit technical field, relate in particular to a kind of IGBT rectification circuit and IGBT rectification circuit control method.
Background technology
Rectification circuit is AC energy to be converted to the circuit of direct current energy.Rectified three-phase circuit mainly completes three-phase alternating current to galvanic conversion, is usually used in electroplanting device, electrolysis unit, DC welder, charging device and ups power.The compositions such as most of rectified current routing transformers, rectification main circuit and filter.It is used widely in fields such as the speed governing of DC motor, the excitation regulation of generator, electrolysis, plating.But the introducing due to transformer, the cost of rectification circuit is always high, and most rectification circuit input power factor is low on the market, current harmonics is large now, to electrical network, cause very large pollution, the low-cost rectification circuit that how to produce and exportable stable DC voltage little to electric network pollution is the direction that engineer studies always.
Summary of the invention
The object of the invention is to propose a kind of simple in structure, stable output, with low cost, to electric network pollution little and IGBT rectification circuit and IGBT rectification circuit control method safely and effectively.
For reaching this object, the present invention by the following technical solutions:
First aspect, a kind of IGBT rectification circuit is provided, comprise the three-phase LC filter LC1 being formed by three-phase inductor L1 and capacitor group C1 parallel connection, the signal acquisition circuit being connected and composed by input voltage sample circuit and circuit of testing the phase sequence, three-phase IGBT inverter bridge circuit, IGBT rectification drive circuit, IGBT rectifier control circuit and current detector A1, the input of described current detector A1 connects three-phase mains, the output of described current detector A1 connects the input of three-phase LC filter LC1 by signal acquisition circuit, the output of described three-phase LC filter LC1 connects the AC of three-phase IGBT inverter bridge circuit, the DC side of three-phase IGBT inverter bridge circuit connects load, the signal output part of IGBT rectifier control circuit is connected with the signal input part of IGBT rectification drive circuit, the signal output part of IGBT rectification drive circuit is connected with the pulse signal input terminal of three-phase IGBT inverter bridge circuit, the signal input part of IGBT rectifier control circuit is connected with signal acquisition circuit with current detector A1 respectively.
Wherein, the input of described current detector A1 connects three-phase mains by fuse F1.
Wherein, the input of described fuse F1 connects three-phase mains by triple-pole switch K1.
Wherein, the DC side of described three-phase IGBT inverter bridge circuit connects load by LC filter LC2, and LC filter LC2 also connects the signal input part of IGBT rectifier control circuit by busbar voltage sample circuit.
Wherein, described LC filter LC2 is in series by DC inductor L2 and capacitor group C2.
Wherein, described IGBT rectification circuit also comprises warning circuit, and warning circuit is connected with IGBT rectifier control circuit.
Wherein, described current detector A1 is Hall current sensor.
Wherein, the DC side of described three-phase IGBT inverter bridge circuit also connects the signal input part of IGBT rectifier control circuit by IDC sampler.
Second aspect, provides a kind of IGBT rectification circuit control method that is applied to above-mentioned IGBT rectification circuit, comprising:
The magnitude of voltage that the current value that received current detector A1 gathers and input voltage sample circuit gather;
Judge current value whether within the scope of default running current value and magnitude of voltage whether within the scope of default normal working voltage value, if current value exceeds default running current value scope and/or magnitude of voltage exceeds default normal working voltage value scope, block three-phase IGBT inverter bridge circuit; If current value does not exceed default running current value scope and magnitude of voltage does not exceed default normal working voltage value scope, described IGBT rectifier control circuit, according to current value and magnitude of voltage, sends pwm signal to IGBT rectification drive circuit;
IGBT rectification drive circuit generates and drives signal to offer three-phase IGBT inverter bridge circuit after pwm signal isolation is amplified.
Wherein, described IGBT rectification circuit also comprises warning circuit, and warning circuit is connected with IGBT rectifier control circuit,
Described IGBT rectifier control circuit judges that whether the phase sequence that circuit of testing the phase sequence gathers is identical with default normal operation phase sequence, if not, and guide alarm circuit.
Beneficial effect of the present invention is: a kind of IGBT rectification circuit, comprise the three-phase LC filter LC1 being formed by three-phase inductor L1 and capacitor group C1 parallel connection, the signal acquisition circuit being connected and composed by input voltage sample circuit and circuit of testing the phase sequence, three-phase IGBT inverter bridge circuit, IGBT rectification drive circuit, IGBT rectifier control circuit and current detector A1, the input of described current detector A1 connects three-phase mains, the output of described current detector A1 connects the input of three-phase LC filter LC1 by signal acquisition circuit, the output of described three-phase LC filter LC1 connects the AC of three-phase IGBT inverter bridge circuit, the DC side of three-phase IGBT inverter bridge circuit connects load, the signal output part of IGBT rectifier control circuit is connected with the signal input part of IGBT rectification drive circuit, the signal output part of IGBT rectification drive circuit is connected with the pulse signal input terminal of three-phase IGBT inverter bridge circuit, the signal input part of IGBT rectifier control circuit is connected with signal acquisition circuit with current detector A1 respectively.This circuit forms IGBT rectification circuit by integrated three-phase LC filter LC1 and three-phase IGBT inverter bridge circuit, abandon using transformer only with less parts, just can realize stable DC bus-bar voltage output, simple in structure, stable output, with low cost and little to electric network pollution.
Further, a kind of IGBT rectification circuit control method that is applied to above-mentioned IGBT rectification circuit is provided, whether the current value that real-time judge gathers and magnitude of voltage be within the scope of default running current value and default normal working voltage value, if send pwm signal to IGBT rectification drive circuit so that IGBT rectification drive circuit generates and drives signal to offer three-phase IGBT inverter bridge circuit according to pwm signal according to current value and magnitude of voltage, block if not three-phase IGBT inverter bridge circuit, assurance IGBT rectification circuit long-term safety is effectively worked.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme in the embodiment of the present invention, below the accompanying drawing of required use during the embodiment of the present invention is described is briefly described, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to the content of the embodiment of the present invention and these accompanying drawings other accompanying drawing.
Fig. 1 is the circuit diagram of IGBT rectification circuit provided by the invention.
Embodiment
For the technical scheme of technical problem that the present invention is solved, employing and the technique effect that reaches clearer, below in conjunction with accompanying drawing, the technical scheme of the embodiment of the present invention is described in further detail, obviously, described embodiment is only the present invention's part embodiment, rather than whole embodiment.Embodiment based in the present invention, those skilled in the art, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
Please refer to Fig. 1, it is the circuit diagram of IGBT rectification circuit provided by the invention.
A kind of IGBT rectification circuit, comprise the three-phase LC filter LC1 being formed by three-phase inductor L1 and capacitor group C1 parallel connection, the signal acquisition circuit being connected and composed by input voltage sample circuit and circuit of testing the phase sequence, three-phase IGBT inverter bridge circuit, IGBT rectification drive circuit, IGBT rectifier control circuit and current detector A1, the input of described current detector A1 connects three-phase mains, the output of described current detector A1 connects the input of three-phase LC filter LC1 by signal acquisition circuit, the output of described three-phase LC filter LC1 connects the AC of three-phase IGBT inverter bridge circuit, the DC side of three-phase IGBT inverter bridge circuit connects load, the signal output part of IGBT rectifier control circuit is connected with the signal input part of IGBT rectification drive circuit, the signal output part of IGBT rectification drive circuit is connected with the pulse signal input terminal of three-phase IGBT inverter bridge circuit, the signal input part of IGBT rectifier control circuit is connected with signal acquisition circuit with current detector A1 respectively.
Three-phase mains provides alternating voltage through three-phase LC filter LC1 to three-phase IGBT inverter bridge circuit, and three-phase IGBT inverter bridge circuit is converted to a stable DC bus output voltage alternating voltage.The input power factor of this circuit can up to more than 0.99, Harmonics of Input I reaches < 5%.
This circuit forms IGBT rectification circuit by integrated three-phase LC filter LC1 and three-phase IGBT inverter bridge circuit, abandon using transformer only with less parts, just can realize stable DC bus-bar voltage output, simple in structure, stable output, with low cost and little to electric network pollution.
Wherein, the input of described current detector A1 connects three-phase mains by fuse F1.
Fuse refers to when electric current surpasses setting, with the heat producing own, makes melt fusing, a kind of electrical equipment of open circuit.Fuse is to surpass setting after a period of time according to electric current, and the heat producing with himself makes melt fusing, thereby circuit is disconnected; A kind of current protector that uses this principle to make.Fuse is widely used in high and low voltage electric distribution system and control system and power consumption equipment, as the protector of short circuit and overcurrent, is to apply one of the most general protection device.
Wherein, the input of described fuse F1 connects three-phase mains by triple-pole switch K1.
Wherein, the DC side of described three-phase IGBT inverter bridge circuit connects load by LC filter LC2, and LC filter LC2 also connects the signal input part of IGBT rectifier control circuit by busbar voltage sample circuit.
Busbar voltage sample circuit, for IGBT rectification busbar voltage out being gathered and feedback, provides one to judge the whether normal reference of bus voltage value to dsp chip.
Wherein, described LC filter LC2 is in series by DC inductor L2 and capacitor group C2.
Capacitor group C2 is filtering capacitor group, is connected in parallel on rectification power circuit output, in order to reduce a kind of energy storage device that exchanges pulse ripple coefficient, smooth direct current output.In use, interchange is converted in the electronic circuit of direct current supply, filtering capacitor group not only makes the output of power supply direct current steadily, reduced the impact of alternation pulse ripple on electronic circuit, also can absorb the current fluctuation producing in the electronic circuit course of work and the interference sealing in via AC power simultaneously, make the service behaviour of electronic circuit more stable.
Wherein, described IGBT rectification circuit also comprises warning circuit, and warning circuit is connected with IGBT rectifier control circuit.
This warning circuit and circuit of testing the phase sequence are combined with.Phase sequence is exactly the order of phase place, is that the instantaneous value of alternating current is from negative value to the order successively on the occasion of changing through null value.In alternating current system, have three wires, be divided into ABC three-phase, three-phase voltage, electric current are symmetrical under normal circumstances, 120 ° of phase phasic differences.Circuit of testing the phase sequence adopts three-phase alternating current phase sequence testing circuit, and whether the phase sequence that can detect three-phase alternating current is correct.If the phase sequence of three-phase alternating current is incorrect, starts warning circuit and report to the police, thereby reached the object of protecting load.
Wherein, described current detector A1 is Hall current sensor.
Hall current sensor is based on magnetic balance type hall principle, it is closed loop principle, the magnetic flux producing as primary current IP concentrates in magnetic circuit by high-quality magnetic core, Hall element is fixed on and in air gap, detects magnetic flux, by the multiturn coil on magnetic core, export reverse offset current, the magnetic flux producing for offsetting former limit IP, makes magnetic flux in magnetic circuit remain zero.Through the processing of special circuit, the output of transducer can be exported the curent change of accurate reflection primary current.
Wherein, the DC side of described three-phase IGBT inverter bridge circuit also connects the signal input part of IGBT rectifier control circuit by IDC sampler.
IDC sampler can Real-time Collection circuit signal and signal is passed to dsp chip and carry out computing, to control fast and accurately the SPWM of IGBT power tube, drives signal.
Preferably, described input voltage sample circuit is DC voltage sample circuit.
Be below the embodiment of IGBT rectification circuit control method provided by the invention.The embodiment of IGBT rectification circuit control method is applied to above-mentioned IGBT rectification circuit embodiment, and the detail content of detailed description not in the embodiment of IGBT rectification circuit control method, can be with reference to above-mentioned IGBT rectification circuit embodiment.
An IGBT rectification circuit control method that is applied to above-mentioned IGBT rectification circuit, comprising:
The magnitude of voltage that the current value that received current detector A1 gathers and input voltage sample circuit gather;
Judge current value whether within the scope of default running current value and magnitude of voltage whether within the scope of default normal working voltage value, if current value exceeds default running current value scope and/or magnitude of voltage exceeds default normal working voltage value scope, block three-phase IGBT inverter bridge circuit; If current value does not exceed default running current value scope and magnitude of voltage does not exceed default normal working voltage value scope, described IGBT rectifier control circuit, according to current value and magnitude of voltage, sends pwm signal to IGBT rectification drive circuit;
IGBT rectification drive circuit generates and drives signal to offer three-phase IGBT inverter bridge circuit after pwm signal isolation is amplified.
Three-phase mains provides alternating voltage through three-phase LC filter LC1 for three-phase IGBT inverter bridge circuit, and the sampled data on comprehensive each road of IGBT rectifier control circuit, after dsp chip calculates, is sent pwm signal to IGBT rectification drive circuit simultaneously; IGBT rectification drive circuit generates final driving signal and offers three-phase IGBT inverter bridge circuit after pwm signal isolation is amplified, and the output of three-phase IGBT inverter bridge circuit obtains a stable DC bus-bar voltage after the filtering of LC filter LC2.
Whether the current value that IGBT rectification circuit control method real-time judge gathers and magnitude of voltage be within the scope of default running current value and default normal working voltage value, if send pwm signal to IGBT rectification drive circuit so that IGBT rectification drive circuit generates and drives signal to offer three-phase IGBT inverter bridge circuit according to pwm signal according to current value and magnitude of voltage, block if not three-phase IGBT inverter bridge circuit, assurance IGBT rectification circuit long-term safety is effectively worked.
Described IGBT rectification circuit also comprises warning circuit, and warning circuit is connected with IGBT rectifier control circuit,
Described IGBT rectifier control circuit judges that whether the phase sequence that circuit of testing the phase sequence gathers is identical with default normal operation phase sequence, if not, and guide alarm circuit.
IGBT rectifier circuit structure provided by the invention is simple, stable output, with low cost, little and safe and effective to electric network pollution.
Above content is only preferred embodiment of the present invention, for those of ordinary skill in the art, according to thought of the present invention, all will change in specific embodiments and applications, and this description should not be construed as limitation of the present invention.
Claims (10)
1. an IGBT rectification circuit, it is characterized in that, comprise the three-phase LC filter LC1 being formed by three-phase inductor L1 and capacitor group C1 parallel connection, the signal acquisition circuit being connected and composed by input voltage sample circuit and circuit of testing the phase sequence, three-phase IGBT inverter bridge circuit, IGBT rectification drive circuit, IGBT rectifier control circuit and current detector A1, the input of described current detector A1 connects three-phase mains, the output of described current detector A1 connects the input of three-phase LC filter LC1 by signal acquisition circuit, the output of described three-phase LC filter LC1 connects the AC of three-phase IGBT inverter bridge circuit, the DC side of three-phase IGBT inverter bridge circuit connects load, the signal output part of IGBT rectifier control circuit is connected with the signal input part of IGBT rectification drive circuit, the signal output part of IGBT rectification drive circuit is connected with the pulse signal input terminal of three-phase IGBT inverter bridge circuit, the signal input part of IGBT rectifier control circuit is connected with signal acquisition circuit with current detector A1 respectively.
2. IGBT rectification circuit according to claim 1, is characterized in that, the input of described current detector A1 connects three-phase mains by fuse F1.
3. IGBT rectification circuit according to claim 2, is characterized in that, the input of described fuse F1 connects three-phase mains by triple-pole switch K1.
4. IGBT rectification circuit according to claim 1, it is characterized in that, the DC side of described three-phase IGBT inverter bridge circuit connects load by LC filter LC2, and LC filter LC2 also connects the signal input part of IGBT rectifier control circuit by busbar voltage sample circuit.
5. IGBT rectification circuit according to claim 4, is characterized in that, described LC filter LC2 is in series by DC inductor L2 and capacitor group C2.
6. IGBT rectification circuit according to claim 1, is characterized in that, described IGBT rectification circuit also comprises warning circuit, and warning circuit is connected with IGBT rectifier control circuit.
7. IGBT rectification circuit according to claim 1, is characterized in that, described current detector A1 is Hall current sensor.
8. IGBT rectification circuit according to claim 1, is characterized in that, the DC side of described three-phase IGBT inverter bridge circuit also connects the signal input part of IGBT rectifier control circuit by IDC sampler.
9. an IGBT rectification circuit control method that is applied to IGBT rectification circuit as claimed in claim 1, is characterized in that, comprising:
The magnitude of voltage that the current value that received current detector A1 gathers and input voltage sample circuit gather;
Judge current value whether within the scope of default running current value and magnitude of voltage whether within the scope of default normal working voltage value, if current value exceeds default running current value scope and/or magnitude of voltage exceeds default normal working voltage value scope, block three-phase IGBT inverter bridge circuit; If current value does not exceed default running current value scope and magnitude of voltage does not exceed default normal working voltage value scope, described IGBT rectifier control circuit, according to current value and magnitude of voltage, sends pwm signal to IGBT rectification drive circuit;
IGBT rectification drive circuit generates and drives signal to offer three-phase IGBT inverter bridge circuit after pwm signal isolation is amplified.
10. IGBT rectification circuit control method as claimed in claim 9, is characterized in that,
Described IGBT rectification circuit also comprises warning circuit, and warning circuit is connected with IGBT rectifier control circuit,
Described IGBT rectifier control circuit judges that whether the phase sequence that circuit of testing the phase sequence gathers is identical with default normal operation phase sequence, if not, and guide alarm circuit.
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| CN201310590526.5A CN103607125A (en) | 2013-11-20 | 2013-11-20 | IGBT rectification circuit and IGBT rectification circuit control method |
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| CN201310590526.5A CN103607125A (en) | 2013-11-20 | 2013-11-20 | IGBT rectification circuit and IGBT rectification circuit control method |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101814851A (en) * | 2009-02-23 | 2010-08-25 | 发那科株式会社 | PWM rectifier |
| CN102427301A (en) * | 2011-10-31 | 2012-04-25 | 常州联力自动化科技有限公司 | Control method of three-phase PWM rectifier |
| CN202931210U (en) * | 2012-07-20 | 2013-05-08 | 中国北车股份有限公司大连电力牵引研发中心 | Power supply unit for testing of electric locomotive |
| CN203554321U (en) * | 2013-11-20 | 2014-04-16 | 广东志成冠军集团有限公司 | IGBT rectifier circuit |
-
2013
- 2013-11-20 CN CN201310590526.5A patent/CN103607125A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101814851A (en) * | 2009-02-23 | 2010-08-25 | 发那科株式会社 | PWM rectifier |
| CN102427301A (en) * | 2011-10-31 | 2012-04-25 | 常州联力自动化科技有限公司 | Control method of three-phase PWM rectifier |
| CN202931210U (en) * | 2012-07-20 | 2013-05-08 | 中国北车股份有限公司大连电力牵引研发中心 | Power supply unit for testing of electric locomotive |
| CN203554321U (en) * | 2013-11-20 | 2014-04-16 | 广东志成冠军集团有限公司 | IGBT rectifier circuit |
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Application publication date: 20140226 |