CN205355909U - Energy -conserving energy memory of motor dynamic braking based on ultracapacitor system - Google Patents
Energy -conserving energy memory of motor dynamic braking based on ultracapacitor system Download PDFInfo
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- CN205355909U CN205355909U CN201521122656.7U CN201521122656U CN205355909U CN 205355909 U CN205355909 U CN 205355909U CN 201521122656 U CN201521122656 U CN 201521122656U CN 205355909 U CN205355909 U CN 205355909U
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- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
The utility model provides an energy -conserving energy memory of motor dynamic braking based on ultracapacitor system, include: motor, converter, dc bus, DCDC converter, supercapacitor set, brake unit, brake resistance, its characteristics are: the one end of DCDC converter be connected to the one end of dc bus, the other end of DCDC converter is connected to supercapacitor set's one end, supercapacitor set's the other end is connected the other end of dc bus. Through the connected mode that changes supercapacitor set and DCDC converter, reduced supercapacitor set's charging voltage, reduced ultracapacitor system's use quantity, improved the electric capacity utilization ratio, reduced energy -conserving cost.
Description
Technical field
This utility model belongs to energy-conservation, technical field of energy storage, relates to a kind of energy saver, specifically a kind of energy consumption of electrical machinery braking energy-saving energy storage device based on ultracapacitor.
Background technology
The transducer drive of current ac motor, when handling goods and iterative motion, alternating-current variable frequency motor is in generating and all the time with electricity condition, and when generating state, many employings braking resistor carries out dynamic braking.Adopt capacitance energy storage mode to be stored by the energy of generating state for saving the energy, the energy back of storage to dc bus will provide electric energy to motor when motor is switched to electricity condition, which reduces the energy absorbed from electrical network, reach energy-conservation purpose.Such application belongs to instantaneous energy storage, is instantaneous discharge and recharge for electric capacity, therefore, adopts ultracapacitor energy storage most effective.At present, conventional energy consumption of electrical machinery braking energy-saving energy storage device is as shown in Figure 2.
Ultracapacitor is a kind of device utilizing electric double layer principle directly to store electric energy, it it is a kind of novel energy-storing device between traditional physical capacitor and battery behavior, compared with traditional electrolysis condenser, the energy storage density of ultracapacitor is high, leakage current is little, the charging interval is short, service life cycle is long, and its temperature range being suitable for is also wide, it it is a kind of healthy environmental type energy storage device, in recent years, it is used widely in electric locomotive, stand-by power supply field as instantaneous, high power energy storage device.
But, super capacitor is expensive, and the monomer voltage of ultracapacitor is relatively low, the voltage requirements of application operating mode can not be met, typically require and become Capacitor banks to use multiple monomer ultracapacitor connection in series-parallel, this just makes the use cost of ultracapacitor significantly high, in this kind of small-scale energy-saving application of energy consumption of electrical machinery braking energy-saving energy storage, it is difficult to from the income of economize on electricity, the short time regains input cost.
Summary of the invention
This utility model is the problems referred to above that prior art exists, it is provided that a kind of energy consumption of electrical machinery braking energy-saving energy storage device based on ultracapacitor, reduces the usage quantity of ultracapacitor, improves super capacitor energy-storage efficiency, reduces energy-conservation cost.
The purpose of this utility model is achieved through the following technical solutions:
A kind of energy consumption of electrical machinery braking energy-saving energy storage device based on ultracapacitor, including motor, converter, dc bus, DC/DC current transformer, bank of super capacitors, brake unit, braking resistor, it is characterized in that, one end of described DC/DC current transformer is connected to one end of described dc bus, the other end of described DC/DC current transformer is connected to one end of described bank of super capacitors, and the other end of described bank of super capacitors connects the other end of described dc bus.
Improvement to technique scheme: described bank of super capacitors includes several monomer ultracapacitor and pressure-equalizing devices that series and parallel.
This utility model advantage compared with prior art and having the benefit effect that
This utility model, by changing the connected mode of bank of super capacitors and DC/DC current transformer, reduces the charging voltage of bank of super capacitors, decreases the usage quantity of ultracapacitor, improve electric capacity utilization rate, reduce energy-conservation cost.
Accompanying drawing explanation
Fig. 1 is the circuit theory diagrams of a kind of energy consumption of electrical machinery braking energy-saving energy storage device based on ultracapacitor of this utility model；
Fig. 2 is the circuit theory diagrams of the energy consumption of electrical machinery braking energy-saving energy storage device of prior art.
In figure: 1-motor, 2-converter, 3-dc bus, 4-DC/DC current transformer, 5-bank of super capacitors, 6-brake unit, 7-braking resistor.
Detailed description of the invention
Below in conjunction with accompanying drawing, this utility model is described in further detail:
Referring to Fig. 1, the embodiment of a kind of energy consumption of electrical machinery braking energy-saving energy storage device based on ultracapacitor of this utility model, including motor 1, converter 2, dc bus 3, DC/DC current transformer 4, bank of super capacitors 5, brake unit 6, braking resistor 7, one end of DC/DC current transformer 4 is connected to one end of dc bus 3, the other end of DC/DC current transformer 4 is connected to one end of bank of super capacitors 5, and the other end of bank of super capacitors 5 connects the other end of dc bus 3.
Above-mentioned bank of super capacitors 5 includes several monomer ultracapacitor and pressure-equalizing devices that series and parallel.
When supply voltage is AC three-phase (RST) 380v, the voltage of usual dc bus 3 is 540Vdc, when motor 1 is braked, dc bus 3 voltage Ud > 540VDC, in the prior art shown in Fig. 2, carry out charged in parallel to bank of super capacitors 5 by DC/DC current transformer 4, thus require that bank of super capacitors is resistance to and be pressed in about 500Vdc, and the pressure voltage of ultracapacitor only has 2.5 2.7V, so the capacitors count to connect is very big.It addition, determine the quantity of shunt capacitance according to capacity motor and the load electric energy size produced that declines.When motor 1 works, bank of super capacitors 5 is discharged, feeding back to dc bus 3 by DC/DC current transformer 4, owing to the BOOST boosting loop of DC/DC current transformer can make the minimum voltage of electric discharge be 300Vdc, namely the utilization rate of electric capacity only reaches 40% (500-300)/500.
As it is shown in figure 1, in the energy-conservation energy storage device of this utility model offer:
The voltage Ud=DC/DC current transformer voltage Ub+ bank of super capacitors voltage Uc of dc bus 3
When motor 1 is braked, the voltage Ud > 540Vdc of dc bus 3；And the threshold voltage of brake unit 6 is 670Vdc, namely the voltage Ud of dc bus 3 is up to 670Vdc, and at this moment DC/DC current transformer 4 provides a reference voltage Ub=540Vdc.So, the maximum charging voltage of bank of super capacitors 5 is:
Uc=Udmax-540=670-540=130Vdc
It is to say, the resistance to pressure request of bank of super capacitors 5 is reduced to 130Vdc by about 500Vdc, so, the monomer ultracapacitor number in ultracapacitor 5 will reduce.When motor 1 works, bank of super capacitors 5 is discharged, owing to DC/DC current transformer voltage Ub+ bank of super capacitors voltage Uc superimposed voltage is higher than bus 3 voltage, so inverter obtains energy from capacitor.Make electric capacity utilization rate reach almost 100% owing to DC/DC current transformer provides 540Vdc reference voltage, namely electric capacity utilization rate improves 150%, thus improve energy storage efficiency, improve power saving rate, reducing ultracapacitor cost.
Certainly, described above is not limitation of the present invention, and the present invention is also not limited to the example above, those skilled in the art, change done in the essential scope of the present invention, remodeling, interpolation or replacement, falls within protection scope of the present invention.
Claims (2)
1. the energy consumption of electrical machinery braking energy-saving energy storage device based on ultracapacitor, including motor, converter, dc bus, DC/DC current transformer, bank of super capacitors, brake unit, braking resistor, it is characterized in that, one end of described DC/DC current transformer is connected to one end of described dc bus, the other end of described DC/DC current transformer is connected to one end of described bank of super capacitors, and the other end of described bank of super capacitors connects the other end of described dc bus.
2. a kind of energy consumption of electrical machinery braking energy-saving energy storage device based on ultracapacitor described in claim 1, it is characterised in that described bank of super capacitors includes several monomer ultracapacitor and pressure-equalizing devices that series and parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521122656.7U CN205355909U (en) | 2015-12-31 | 2015-12-31 | Energy -conserving energy memory of motor dynamic braking based on ultracapacitor system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521122656.7U CN205355909U (en) | 2015-12-31 | 2015-12-31 | Energy -conserving energy memory of motor dynamic braking based on ultracapacitor system |
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| CN205355909U true CN205355909U (en) | 2016-06-29 |
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| CN201521122656.7U Expired - Fee Related CN205355909U (en) | 2015-12-31 | 2015-12-31 | Energy -conserving energy memory of motor dynamic braking based on ultracapacitor system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106443241A (en) * | 2016-08-31 | 2017-02-22 | 株洲中车时代电气股份有限公司 | Monitoring method and device and protection method and device of train braking resistor |
| CN111847158A (en) * | 2019-04-29 | 2020-10-30 | 合肥天浦硕能电子科技有限公司 | Elevator energy feedback device for Internet of things protocol transparent transmission super capacitor energy storage |
-
2015
- 2015-12-31 CN CN201521122656.7U patent/CN205355909U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106443241A (en) * | 2016-08-31 | 2017-02-22 | 株洲中车时代电气股份有限公司 | Monitoring method and device and protection method and device of train braking resistor |
| CN106443241B (en) * | 2016-08-31 | 2019-08-16 | 株洲中车时代电气股份有限公司 | A kind of monitoring method, device and the guard method of vehicle-mounted braking resistor, device |
| CN111847158A (en) * | 2019-04-29 | 2020-10-30 | 合肥天浦硕能电子科技有限公司 | Elevator energy feedback device for Internet of things protocol transparent transmission super capacitor energy storage |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160629 Termination date: 20171231 |
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| CF01 | Termination of patent right due to non-payment of annual fee |