CN202475293U - Three-phase voltage pulse width modulation rectifier - Google Patents
Three-phase voltage pulse width modulation rectifier Download PDFInfo
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- CN202475293U CN202475293U CN2012201145856U CN201220114585U CN202475293U CN 202475293 U CN202475293 U CN 202475293U CN 2012201145856 U CN2012201145856 U CN 2012201145856U CN 201220114585 U CN201220114585 U CN 201220114585U CN 202475293 U CN202475293 U CN 202475293U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
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Abstract
The utility model discloses a three-phase voltage pulse width modulation (PWM) rectifier, which comprises a PWM rectifier body connected with an accumulator, a bidirectional DCDC converter connected in series with the PWM rectifier body, a detection controller used for detecting the voltage of the accumulator and controlling the PWM rectifier body and the bidirectional DCDC converter, wherein the PWM rectifier body is connected with the bidirectional DCDC converter via switches S1 and S2; when the detection controller detects that the voltage of the accumulator is lower than a preset threshold value, the switch S2 is controlled to close, and the switch S1 is opened; the accumulator discharges under the preset threshold value of the voltage via the PWM rectifier and the bidirectional DCDC converter; when the voltage of the accumulator is higher than the preset threaded value, the switch S1 is controlled to close, and the switch S2 is opened, the bidirectional DCDC converter is bypassed, and the PWM rectifier body directly charges and discharges the accumulator. The pulse width modulation rectifier can solve a problem that a thyristor charging/discharging motor generates current harmonic wave interference in a grid side during the production and forming of the accumulator is solved.
Description
Technical field
The utility model relates to a kind of rectifier to accumulator cell charging and discharging.
Background technology
Existing three-phase full-bridge controlled rectifier control technology simple in structure is ripe, but because the ac input power factor is low, produces a large amount of harmonic currents, can produce bigger pollution to electrical network.
The concrete harmonic wave harm that produces comprises the harm to generating equipment: Harmonic Interference increases the loss of generator, produces parasitic torque, has reduced the efficient of mechanical energy to the electric energy conversion; Harmonic wave produces extra loss in coil windings and rotor damping coil, produce vibration and send unusual noise.THDI must be smaller or equal to 20% in the generator, otherwise the power of generator also must be converted; Harm to transmission facility: loss increases (skin effect), initiation resonance (line inductance, direct-to-ground capacitance), current in middle wire increase, influences the stable operation (malfunction of relaying protection or tripping) of circuit; Harm to power supply unit: infringement electric capacity, transformer fall appearance (stray loss that copper loss, eddy current loss and conductor outside cause because of leakage flux), reduction reliability, influence the accuracy of power measurement; Harm to power consumption equipment: apparent power increases, the electronic equipment of susceptibility; Harm to human body: human body cell is at the excitation time that is upset; Quick electro-mechanical wave or reversible upset can take place in the cell membrane resting potential; If its frequency is close with harmonic frequency, the electromagnetic radiation of mains by harmonics will directly influence people's brain magnetic field and core field, causes discomfort; Even induce an illness, be detrimental to health.
Produce the reason of harmonic wave harm: the input power factor of three phase full bridge six pulse controlled rectification circuits comes just decision by commutation overlap angle γ and pilot angle α.Commutation overlap angle γ is meant the time of the common conducting of two phase voltages in the rectified three-phase circuit; Pilot angle α representes to trigger delay time, promptly begins to the time of not conducting of this section thyristor the thyristor triggering and conducting from sinusoidal wave zero passage.If γ is very little at the commutation overlap angle, in the time of can ignoring, explain that the power factor of rectifier is mainly relevant with the control cosine of an angle, pilot angle is littler, and power factor is bigger; Otherwise then power factor is littler.In fact, in rectification circuit, except existing between commutating voltage and the rectified current the phase difference.Also exist because the current waveform distortion problem that higher harmonic current causes.
The utility model content
The utility model mainly solves storage battery and produces in the formation process thyristor-type charge-discharge machine to the current harmonics interference problem of net side (such as three-phase 380V side).Three-phase voltage type pulse-width modulation (PWM) rectifier is provided, has used the charge-discharge machine of pulse-width modulation commutation technique when execution discharges and recharges technology, to guarantee net side power factor＞95%, harmonic content＜5%.
The utility model provides a kind of three-phase voltage type pulse-width modulation (PWM) rectifier; Comprise a PWM rectifier that is connected with batteries; One bidirectional DC/DC converter, detection controller that is used to detect accumulator battery voltage and controls PWM rectifier, bidirectional DC/DC converter operating state of connecting with said PWM rectifier, said PWM rectifier is connected bidirectional DC/DC converter through switch S 1 with S2; Said detection controller detects accumulator battery voltage and is lower than pre-set threshold value, and then control switch S2 is closed, and switch S 1 is broken off, and through said PWM rectifier and bidirectional DC/DC converter batteries is discharged and recharged; When detecting accumulator battery voltage and being higher than pre-set threshold value, control switch S1 is closed, and switch S 2 is broken off, and bidirectional DC/DC converter is is directly discharged and recharged batteries through the PWM rectifier by bypass.
Said PWM rectifier is connected bidirectional DC/DC converter through a switch S 1 with two switch S 2, and a said switch S 1 and two switch S 2 also all are electrically connected and detect controller, receive its control signal.
Three-phase voltage type pulse-width modulation (PWM) rectifier of the utility model can guarantee that three-phase voltage net side input and output electric current is the sine wave of High Power Factor, can guarantee that again battery charging and discharging can fill from 0V, has guaranteed high availability, has outstanding advantage.
What at first adopt is the PWM rectifier of SVPWM, compares with traditional thyristor phase-shifting full-bridge, and the High Power Factor of net side all is a high advantage for generating transmission of electricity power consumption equipment.
Secondly, because the PWM rectifier is to see it is the structure of boosting from AC-to DC, this must be a problem for the low tension battery group that changes into.DCDC transducer cascade with two-way buck structure has well solved this problem between batteries and PWM rectifier.
Description of drawings
Fig. 1 is the three-phase voltage type pulse width modulation rectifier electrical block diagram that the utility model embodiment provides.
Fig. 2 is the three-phase voltage type pulse width modulation rectifier topology diagram that the utility model embodiment provides.
Embodiment
For the purpose, technical scheme and the advantage that make the utility model is clearer, will combine accompanying drawing that the utility model is done to describe in detail further below.
As shown in Figure 1; Three-phase voltage type pulse-width modulation (PWM) rectifier that the utility model embodiment provides; Comprise a PWM rectifier that is connected with batteries; A bidirectional DC/DC converter of connecting, a detection controller that is used to detect accumulator battery voltage and controls PWM rectifier, bidirectional DC/DC converter operating state with said PWM rectifier, said PWM rectifier is connected bidirectional DC/DC converter through switch S 1 with S2; Said detection controller detects accumulator battery voltage and is lower than pre-set threshold value; Then control switch S2 is closed; Switch S 1 is broken off, and through said PWM rectifier and bidirectional DC/DC converter batteries is discharged and recharged, and batteries is discharged and recharged under this threshold voltage; When detecting accumulator battery voltage and being higher than pre-set threshold value, control switch S1 is closed, and switch S 2 is broken off, and bidirectional DC/DC converter is is directly discharged and recharged batteries through the PWM rectifier by bypass.
Because the PWM rectifier is the structure of boosting from the AC side to the DC side, so can't charge to the low tension battery group.The bidirectional DC/DC converter so connect in the back, assurance can discharge and recharge to the low tension battery group.System's utilization detects controller and detects accumulator battery voltage; When accumulator battery voltage was lower than certain threshold values, control switch S2 inserted, and switch S 1 is broken off; The bidirectional DC/DC structure is linked in the middle of the system, makes that the batteries under this threshold voltage can be discharged and recharged.When system's detection accumulator battery voltage was higher than certain threshold values, control switch S1 inserted, and switch S 2 is broken off, and bidirectional DC/DC converter is is directly discharged and recharged with the PWM rectifier by bypass.The Three-phase PWM Voltage Rectifier of the utility model can guarantee that three-phase voltage net side input and output electric current is the sine wave of High Power Factor, can guarantee that again battery charging and discharging can fill from 0V, has guaranteed high availability.
As shown in Figure 2; It is three-phase voltage type pulse-width modulation (PWM) the rectifier topology diagram of the utility model embodiment; Be exactly according to three-phase VSR topological structure; (a, b utilize in c) circuit philosophy (kirchhoff voltage, current law) to general mathematical description that VSR set up at the three phase static coordinate system.Suppose that the electrical network electromotive force is a three-phase symmetrical sine ripple, net side inductance is a linear inductance.
Ea among Fig. 2, eb and ec are the three-phase symmetrical power phase voltage, and ia, ib and ic are the three-phase phase current, and udc is a dc voltage, and L is the AC side filter inductance, and R is inductance and the equivalent resistance that closes open pipe, and VT1 to VT6 switching tube is formed three-phase PWM rectifier bridge (VSR).
The control method of the Three-phase PWM Voltage Rectifier of the utility model comprises:
In order to make Three-phase PWM Voltage Rectifier be operated in the unity power factor state different control methods can be arranged.Can these control methods be divided into two kinds according to whether introducing current feedback, that does not introduce the ac-side current feedback is called indirect current control, introduces the Direct Current Control that is called of ac-side current feedback.
Indirect current control is controlled rectification AC side voltage according to AC side electric current and voltage vector correlation exactly, makes ac-side current and voltage same-phase.This control method will be used alternating current sensibility reciprocal L and resistance R in the signal operation process.When the operation values of L and R has error, will inevitably have influence on control and hand over fruit.Outside a little, this control method is based on the static models design of system, and its dynamic characteristic is relatively poor.Therefore, the system applies of indirect current control is less.
Direct Current Control is obtained AC side input current command value through computing, introduces the alternating current feedback again, makes its trace command current value through the direct control to ac-side current.The current response speed of Direct Current Control is fast, system parameters is relied on not quite, thereby obtained to use widely.
Three-phase voltage type pulse-width modulation (PWM) rectifier of the utility model can guarantee that three-phase voltage net side input and output electric current is the sine wave of High Power Factor, can guarantee that again battery charging and discharging can fill from 0V, has guaranteed high availability, has outstanding advantage.
Claims (2)
1. three-phase voltage type pulse width modulation rectifier; It is characterized in that; Comprise a PWM rectifier that is connected with batteries; A bidirectional DC/DC converter of connecting, a detection controller that is used to detect accumulator battery voltage and controls PWM rectifier, bidirectional DC/DC converter operating state with said PWM rectifier, said PWM rectifier is connected bidirectional DC/DC converter through switch S 1 with S2; Said detection controller detects accumulator battery voltage and is lower than pre-set threshold value, and then control switch S2 is closed, and switch S 1 is broken off, and through said PWM rectifier and bidirectional DC/DC converter batteries is discharged and recharged; Control switch S 1 closure when detecting accumulator battery voltage and being higher than pre-set threshold value, switch S 2 is broken off, and bidirectional DC/DC converter is is directly discharged and recharged batteries through the PWM rectifier by bypass.
2. according to the said three-phase voltage type pulse width modulation rectifier of claim 1; It is characterized in that; Said PWM rectifier is connected bidirectional DC/DC converter through a switch S 1 with two switch S 2, and a said switch S 1 and two switch S 2 all are electrically connected and detect controller, receive its control signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201145856U CN202475293U (en) | 2012-03-22 | 2012-03-22 | Three-phase voltage pulse width modulation rectifier |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201145856U CN202475293U (en) | 2012-03-22 | 2012-03-22 | Three-phase voltage pulse width modulation rectifier |
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| CN202475293U true CN202475293U (en) | 2012-10-03 |
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| CN2012201145856U Expired - Fee Related CN202475293U (en) | 2012-03-22 | 2012-03-22 | Three-phase voltage pulse width modulation rectifier |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103178738A (en) * | 2013-02-27 | 2013-06-26 | 薛建仁 | Novel efficient energy-saving PWM (pulse-width modulation) industrial rectifying power supply |
| CN103683399A (en) * | 2013-11-29 | 2014-03-26 | 小米科技有限责任公司 | Charge management chip and control method |
| CN105807127A (en) * | 2016-05-13 | 2016-07-27 | 儒竞艾默生环境优化技术（上海）有限公司 | Current detecting circuit and method |
| CN107910931A (en) * | 2017-12-15 | 2018-04-13 | 深圳新恒业电气有限公司 | A kind of control method of single group and multigroup energy storage converting means |
| CN110739868A (en) * | 2019-10-12 | 2020-01-31 | 惠州市新斯贝克动力科技有限公司 | series power expansion circuit and method |
-
2012
- 2012-03-22 CN CN2012201145856U patent/CN202475293U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103178738A (en) * | 2013-02-27 | 2013-06-26 | 薛建仁 | Novel efficient energy-saving PWM (pulse-width modulation) industrial rectifying power supply |
| CN103683399A (en) * | 2013-11-29 | 2014-03-26 | 小米科技有限责任公司 | Charge management chip and control method |
| CN105807127A (en) * | 2016-05-13 | 2016-07-27 | 儒竞艾默生环境优化技术（上海）有限公司 | Current detecting circuit and method |
| CN105807127B (en) * | 2016-05-13 | 2019-02-26 | 儒竞艾默生环境优化技术（上海）有限公司 | Current detection circuit and method |
| CN107910931A (en) * | 2017-12-15 | 2018-04-13 | 深圳新恒业电气有限公司 | A kind of control method of single group and multigroup energy storage converting means |
| CN110739868A (en) * | 2019-10-12 | 2020-01-31 | 惠州市新斯贝克动力科技有限公司 | series power expansion circuit and method |
| CN110739868B (en) * | 2019-10-12 | 2021-11-09 | 惠州市新斯贝克动力科技有限公司 | Series power expansion circuit and method |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121003 Termination date: 20130322 |