CN202721450U - Fully controllable energy feedback device - Google Patents

Fully controllable energy feedback device Download PDF

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Publication number
CN202721450U
CN202721450U CN 201220246890 CN201220246890U CN202721450U CN 202721450 U CN202721450 U CN 202721450U CN 201220246890 CN201220246890 CN 201220246890 CN 201220246890 U CN201220246890 U CN 201220246890U CN 202721450 U CN202721450 U CN 202721450U
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CN
China
Prior art keywords
circuit
voltage
bus
energy feedback
bipolar transistor
Prior art date
Application number
CN 201220246890
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Chinese (zh)
Inventor
钟玉涛
张宁
郑伟
王国锋
曹力研
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深圳市海浦蒙特科技有限公司
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Priority to CN 201220246890 priority Critical patent/CN202721450U/en
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Publication of CN202721450U publication Critical patent/CN202721450U/en

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Abstract

The utility model relates to a fully controllable energy feedback device comprising a control circuit, an insulated gate bipolar transistor inverting circuit, a bus voltage detection circuit, a voltage and current detection circuit and a filtering circuit. The bus voltage detection circuit is used for detecting the voltage of a direct current bus and transmitting a detected value to the control circuit. The voltage and current detection circuit is used for detecting three-phase alternating current voltage and current of a power grid and transmitting detected values to the control circuit. The control circuit is used for generating a driving signal according to amplitude and phase of the three-phase alternating current voltage and amplitude and phase of the three-phase alternating current current of the power grid when the voltage detected value of the direct current bus is higher than a preset starting voltage value, driving the connection and disconnection of an insulated gate bipolar transistor, inverting direct current from the direct current bus into three-phase alternating current, and transmitting the three-phase alternating current to the power grid after the three-phase alternating current is filtered by the filtering circuit. The fully controllable energy feedback device has the advantages of a low power factor and small harmonic pollution and has the effects of energy saving and environmental friendliness.

Description

The whole controlled energy feedback device

Technical field

The utility model relates to transformation device, particularly relates to a kind of whole controlled energy feedback device.

Background technology

Along with the development of society and the progress of technology, frequency converter more and more is applied in the every field of producing and living, and all can produce regenerative electric energy when the load of motor band potential energy and deceleration, and the regenerative electric energy meeting causes the frequency converter overvoltage so that the frequency converter busbar voltage raises.General way is to allow regenerative electric energy consumption on brake resistance, but this way not only wastes energy, also can cause the frequency converter working temperature to raise because of the brake resistance heating, affects the frequency converter life-span.Along with the propelling of energy-saving and emission-reduction and the enhancing of environmental protection consciousness, by energy back feed device the Way of Regenerating Energy Feedback that motor produces is arrived electrical network, thereby reach the purpose of energy-conserving and environment-protective.

Traditional energy feedback system mainly is comprised of the thyristor active inverter, and it is open-minded because thyristor can only be controlled, and can not control its shutoff, therefore be called half controlled energy feedback system.There are the problems such as power factor is lower, harmonic pollution is larger in half controlled energy feedback system.

The utility model content

Based on this, being necessary provides a kind of whole controlled energy feedback device for the technical problem of traditional half controlled energy feedback system existence.

A kind of whole controlled energy feedback device, comprise control circuit, the insulated gate bipolar transistor inversion circuit, the busbar voltage testing circuit, voltage and current detection circuit and filter circuit, described control circuit connects the insulated gate bipolar transistor inversion circuit, busbar voltage testing circuit and voltage and current detection circuit, described busbar voltage testing circuit and insulated gate bipolar transistor inversion circuit are all for connecting dc bus, described voltage and current detection circuit is used for connecting electrical network, and described insulated gate bipolar transistor inversion circuit is used for connecting electrical network by filter circuit; Described busbar voltage testing circuit sends described control circuit to for detection of the voltage of described dc bus and with detected value, and described voltage and current detection circuit sends described control circuit to for detection of the three-phase alternating voltage of described electrical network and electric current and with detected value; Described control circuit is used for when the voltage detecting value of dc bus is higher than default starting resistor value, generate according to the amplitude of the amplitude of the three-phase alternating voltage of electrical network and phase place and three-phase alternating current and phase place and to drive signal, the insulated gate bipolar transistor that drives in the described insulated gate bipolar transistor inversion circuit turns on and off, to be three-phase alternating current from the dc inverter of described dc bus, after described filter circuit filtering, flow to described electrical network.

Therein among embodiment, described control circuit comprises digital signal processor and drive circuit, described drive circuit connects described digital signal processor and insulated gate bipolar transistor inversion circuit, and described digital signal processor connects described busbar voltage testing circuit and voltage and current detection circuit; Described digital signal processor comprises feedback unit, described feedback unit adopts phase-locked loop and coordinate transformating technology to generate described driving signal take the target of power factor as 1 by space vector width pulse modulation method, and being transferred to described drive circuit, the insulated gate bipolar transistor that amplifies in the described insulated gate bipolar transistor inversion circuit of rear drive through described drive circuit isolation turns on and off.

Therein among embodiment; described digital signal processor also comprises the abnormal protection module; be used for carrying out bus overvoltage and under-voltage protection according to the voltage detecting value of dc bus, also be used for carrying out frequency anomaly, overcurrent and overload protection according to the detected value of three-phase alternating voltage and electric current.

Therein among embodiment, described whole controlled energy feedback device also comprises the positive pole that is connected to described dc bus and the energy storage filter capacitor between the negative pole.

Among embodiment, described whole controlled energy feedback device also comprises the buffer resistance of connecting with described energy storage filter capacitor, and the controlled switch in parallel with described buffer resistance therein.

Among embodiment, described filter circuit is filter inductance therein.

Therein among embodiment, also comprise the first protective tube of the positive pole of being located at dc bus and be located at the second protective tube of dc bus negative pole.

Among embodiment, also comprise the RS485 communication interface therein.

Above-mentioned whole controlled energy feedback device, after control circuit obtains the three-phase alternating voltage and electric current of the voltage of dc bus and electrical network, be three-phase alternating current by the insulated gate bipolar transistor inversion circuit with the dc inverter of dc bus, and after filter circuit filtering, flow to described electrical network.Power factor is low, harmonic pollution is little, therefore can play the effect of energy-conserving and environment-protective.

Description of drawings

Fig. 1 is the electrical block diagram of whole controlled energy feedback device among the embodiment;

Fig. 2 is the electrical block diagram of whole controlled energy feedback device among another embodiment;

Fig. 3 is the charging schematic diagram that the whole controlled energy feedback device at first powers on from electrical network among the embodiment;

Fig. 4 be among the embodiment whole controlled energy feedback device at first from the charging schematic diagram of direct current bus bar;

Fig. 5 is the schematic diagram of the external guidance panel of whole controlled energy feedback device among the embodiment.

Embodiment

For the purpose of this utility model, feature and advantage can more be become apparent, below in conjunction with accompanying drawing embodiment of the present utility model is described in detail.

Fig. 1 is the electrical block diagram of whole controlled energy feedback device among the embodiment.The whole controlled energy feedback device comprises control circuit 10, insulated gate bipolar transistor (IGBT) inverter circuit 20, busbar voltage testing circuit 30, voltage and current detection circuit 40 and filter circuit 50.Control circuit 10 connects insulated gate bipolar transistor inversion circuit 20, busbar voltage testing circuit 30 and voltage and current detection circuit 40, busbar voltage testing circuit 30 and insulated gate bipolar transistor inversion circuit 20 all connect dc bus, voltage and current detection circuit 40 connects electrical network, and insulated gate bipolar transistor inversion circuit 20 connects electrical network by filter circuit 50.

Busbar voltage testing circuit 30 sends control circuit 10 to for detection of the voltage of dc bus and with detected value, and voltage and current detection circuit 40 sends control circuit 10 to for detection of the three-phase alternating voltage of electrical network and three-phase alternating current and with detected value.

Control circuit 10 is used for when the voltage detecting value of dc bus is higher than default starting resistor value, generate according to the amplitude of the amplitude of the three-phase alternating voltage of electrical network and phase place and three-phase alternating current and phase place and to drive signal, the insulated gate bipolar transistor (IGBT) that drives in the insulated gate bipolar transistor inversion circuit 20 turns on and off, to be three-phase alternating current from the dc inverter of dc bus, and after filter circuit 50 filtering, flow to electrical network.

Fig. 2 is the electrical block diagram of whole controlled energy feedback device among another embodiment.In this embodiment, control circuit 10 comprises digital signal processor (DSP) 12 and drive circuit 14.Drive circuit 14 linking number word signal processors 12 and insulated gate bipolar transistor inversion circuit 20, digital signal processor 12 connection bus voltage detecting circuits 30 and voltage and current detection circuit 40.

Digital signal processor 12 comprises feedback unit.Feedback unit adopts phase-locked loop and coordinate transformating technology, Current Decomposition is become active current and reactive current, and take the target of power factor as 1, generate the driving signal by space vector pulse width modulation (SVPWM) method and be transferred to drive circuit 14, the insulated gate bipolar transistor that amplifies in the rear drive insulated gate bipolar transistor inversion circuit 20 through drive circuit 14 isolation turns on and off, to be three-phase alternating current from the dc inverter of dc bus, after filter circuit 50 filtering, flow to electrical network.

Adopt digital signal processor (DSP) as main control chip, because its operational capability is strong, can carry out fast and efficiently the calculating such as phase-locked and coordinate transform.And digital signal processor has abundant Peripheral Interface, is easy to carry out the sampling of voltage, electric current and produces pulse width modulation (PWM) signal.Adopt DSP control, the SVPWM modulation, harmonic pollution is little, power factor (PF) is high.

In embodiment illustrated in fig. 2; digital signal processor 12 also comprises the abnormal protection module; be used for carrying out bus overvoltage and under-voltage protection according to the voltage detecting value of dc bus, also be used for carrying out frequency anomaly, overcurrent and overload protection according to the detected value of three-phase alternating voltage and electric current.

Concrete, digital signal processor 12 is realized overvoltage and under-voltage protection by detecting the voltage of dc bus jointly with two kinds of methods of hardware and software; By detecting three-phase alternating current, jointly realize overcurrent protection with two kinds of methods of hardware and software, and realize overload protection by the method for software; By detecting three-phase alternating voltage, realize the frequency anomaly protection.Therein among embodiment, can also be by realizing overheat protectors to digital signal processor 12 external thermistors.

The abnormal protection module of digital signal processor 12 can realize overcurrent, overvoltage, overload, phase shortage, the complete defencive function such as overheated, makes the whole controlled energy feedback device have very high reliability.

In one embodiment, the whole controlled energy feedback device also comprises the positive pole that is connected to dc bus and the energy storage filter capacitor C1 between the negative pole.As shown in Figure 2, energy storage filter capacitor C1 is connected between the input of insulated gate bipolar transistor inversion circuit 20 and dc bus positive and negative electrode.

In embodiment illustrated in fig. 2, the whole controlled energy feedback device also comprises the buffer resistance R1 that connects with energy storage filter capacitor C1, and is the two ends that controlled switch KM1 two ends are connected respectively buffer resistance R1 with the controlled switch KM1(of buffer resistance R1 parallel connection).

Buffer resistance R1 and controlled switch KM1 consist of the buffer circuit that powers on jointly.Controlled switch KM1 did not disconnect when the whole controlled energy feedback device was charged.When powering on, energy feedback unit (comprises by grid side powering on first, as shown in Figure 3; Perhaps powered on first by dc bus, as shown in Figure 4), powered on moment controlled switch KM1 disconnects, and to energy storage filter capacitor C1 charging, charging current is less, has reduced the impact of impulse current to IGBT and energy storage filter capacitor C1 by buffer resistance R1 for circuit.Power on finish after controlled switch KM1 adhesive, the electric current buffer resistance R1 that no longer flows through.

Therein among embodiment, the voltage that digital signal processor 12 detects dc bus greater than default first threshold after, control controlled switch KM1 adhesive; The voltage that detects dc bus when digital signal processor 12 less than default Second Threshold after, control controlled switch KM1 disconnects.

In embodiment illustrated in fig. 2, the whole controlled energy feedback device also comprises the first protective tube FU1 that is located at the dc bus positive pole and is located at dc bus negative pole the second protective tube FU2.When large electric current appears unusually causing producing on the dc bus both positive and negative polarity very in energy feedback, if this electric current greater than the then protective tube fusing of protective tube blowout current, thereby protection is connected to the equipment on the dc bus, for example frequency converter.

In embodiment illustrated in fig. 2, filter circuit 50 is filter inductances.Namely adopt the method for independent inductance to carry out filtering, and filter inductance is integrated in whole controlled energy feedback device inside.Because whole controlled energy feedback device of the present utility model has adopted advanced control method, use independent inductance to carry out filtering and can reach good filter effect equally, with respect to the combined filter of inductance and electric capacity, the scheme of inductance has been saved system cost separately, has improved the integration of system.

Among embodiment, the whole controlled energy feedback device also provides the guidance panel interface therein, and interface shape is the RS485 communication interface, as shown in Figure 5.When needs use guidance panel to carry out parameter setting (for example setting aforesaid starting resistor value) and Stateful Inspection, can pass through the external guidance panel of RS485 communication interface, then do not need at ordinary times the attended operation panel.So both handled easily need to not be equipped with guidance panel again on each whole controlled energy feedback device, had saved system cost.The RS485 communication interface also can be used for the ModBus communication and consists of long distance control system.

That above-mentioned whole controlled energy feedback device compact conformation, circuit consist of is simple, excellent performance, reliability are strong, easy to use, can satisfy the higher requirement of client.

The above embodiment has only expressed several execution mode of the present utility model, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to the utility model claim.Should be pointed out that for the person of ordinary skill of the art, without departing from the concept of the premise utility, can also make some distortion and improvement, these all belong to protection range of the present utility model.Therefore, the protection range of the utility model patent should be as the criterion with claims.

Claims (8)

1. whole controlled energy feedback device, it is characterized in that, comprise control circuit, the insulated gate bipolar transistor inversion circuit, the busbar voltage testing circuit, voltage and current detection circuit and filter circuit, described control circuit connects the insulated gate bipolar transistor inversion circuit, busbar voltage testing circuit and voltage and current detection circuit, described busbar voltage testing circuit and insulated gate bipolar transistor inversion circuit are all for connecting dc bus, described voltage and current detection circuit is used for connecting electrical network, and described insulated gate bipolar transistor inversion circuit is used for connecting electrical network by filter circuit;
Described busbar voltage testing circuit sends described control circuit to for detection of the voltage of described dc bus and with detected value, and described voltage and current detection circuit sends described control circuit to for detection of the three-phase alternating voltage of described electrical network and electric current and with detected value;
Described control circuit is used for when the voltage detecting value of dc bus is higher than default starting resistor value, generate according to the amplitude of the amplitude of the three-phase alternating voltage of electrical network and phase place and three-phase alternating current and phase place and to drive signal, the insulated gate bipolar transistor that drives in the described insulated gate bipolar transistor inversion circuit turns on and off, to be three-phase alternating current from the dc inverter of described dc bus, after described filter circuit filtering, flow to described electrical network.
2. whole controlled energy feedback device according to claim 1, it is characterized in that, described control circuit comprises digital signal processor and drive circuit, described drive circuit connects described digital signal processor and insulated gate bipolar transistor inversion circuit, and described digital signal processor connects described busbar voltage testing circuit and voltage and current detection circuit;
Described digital signal processor comprises feedback unit, described feedback unit adopts phase-locked loop and coordinate transformating technology to generate described driving signal take the target of power factor as 1 by space vector width pulse modulation method, and being transferred to described drive circuit, the insulated gate bipolar transistor that amplifies in the described insulated gate bipolar transistor inversion circuit of rear drive through described drive circuit isolation turns on and off.
3. whole controlled energy feedback device according to claim 2; it is characterized in that; described digital signal processor also comprises the abnormal protection module; be used for carrying out bus overvoltage and under-voltage protection according to the voltage detecting value of dc bus, also be used for carrying out frequency anomaly, overcurrent and overload protection according to the detected value of three-phase alternating voltage and electric current.
4. whole controlled energy feedback device according to claim 1 is characterized in that, described whole controlled energy feedback device also comprises the positive pole that is connected to described dc bus and the energy storage filter capacitor between the negative pole.
5. whole controlled energy feedback device according to claim 4 is characterized in that, described whole controlled energy feedback device also comprises the buffer resistance of connecting with described energy storage filter capacitor, and the controlled switch in parallel with described buffer resistance.
6. whole controlled energy feedback device according to claim 1 is characterized in that, described filter circuit is filter inductance.
7. whole controlled energy feedback device according to claim 1 is characterized in that, also comprises first protective tube and the second protective tube of being located at the dc bus negative pole of the positive pole of being located at dc bus.
8. whole controlled energy feedback device according to claim 1 is characterized in that, also comprises the RS485 communication interface.
CN 201220246890 2012-05-29 2012-05-29 Fully controllable energy feedback device CN202721450U (en)

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CN 201220246890 CN202721450U (en) 2012-05-29 2012-05-29 Fully controllable energy feedback device

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Application Number Priority Date Filing Date Title
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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103595266A (en) * 2013-11-21 2014-02-19 青岛威控电气有限公司 Explosion-proof intrinsically safe variable-frequency drive for mining
CN104201719A (en) * 2014-09-09 2014-12-10 南京南瑞继保电气有限公司 Locomotive regeneration electric energy feedback device and control method thereof
CN105098836A (en) * 2015-09-01 2015-11-25 河北工业大学 Micro isolated grid-connected and off-grid inverter
CN107380187A (en) * 2016-11-28 2017-11-24 盾石磁能科技有限责任公司 Track traffic regenerating braking energy comprehensive recycling device and method
WO2019091297A1 (en) * 2017-11-07 2019-05-16 珠海格力节能环保制冷技术研究中心有限公司 Power supply system for magnetic bearing and control method therefor
CN109980950A (en) * 2019-04-12 2019-07-05 山东华特磁电科技股份有限公司 Double PWM variable-frequency power sources feedback energy processing units and method

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103595266A (en) * 2013-11-21 2014-02-19 青岛威控电气有限公司 Explosion-proof intrinsically safe variable-frequency drive for mining
CN104201719A (en) * 2014-09-09 2014-12-10 南京南瑞继保电气有限公司 Locomotive regeneration electric energy feedback device and control method thereof
CN105098836A (en) * 2015-09-01 2015-11-25 河北工业大学 Micro isolated grid-connected and off-grid inverter
CN107380187A (en) * 2016-11-28 2017-11-24 盾石磁能科技有限责任公司 Track traffic regenerating braking energy comprehensive recycling device and method
CN107380187B (en) * 2016-11-28 2019-12-03 盾石磁能科技有限责任公司 Rail traffic regenerating braking energy comprehensive recycling device and method
WO2019091297A1 (en) * 2017-11-07 2019-05-16 珠海格力节能环保制冷技术研究中心有限公司 Power supply system for magnetic bearing and control method therefor
CN109980950A (en) * 2019-04-12 2019-07-05 山东华特磁电科技股份有限公司 Double PWM variable-frequency power sources feedback energy processing units and method

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