CN205080211U - High -voltage inverter simulation motor load platform topological structure - Google Patents
High -voltage inverter simulation motor load platform topological structure Download PDFInfo
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- CN205080211U CN205080211U CN201520817965.XU CN201520817965U CN205080211U CN 205080211 U CN205080211 U CN 205080211U CN 201520817965 U CN201520817965 U CN 201520817965U CN 205080211 U CN205080211 U CN 205080211U
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Abstract
The utility model discloses a high -voltage inverter simulation motor load platform topological structure, survey motor, load motor, shaft coupling and encoder including a general type high -voltage inverter, four -quadrant high -voltage inverter, a quilt. Two converters are connected with the electric wire netting respectively, adopt the control of general type high -voltage inverter to be surveyed the motor, adopt four -quadrant high -voltage inverter control load motor, and the output shaft of being surveyed motor and load motor is connected through the shaft coupling. In the loading procedure, surveyed the motor and be in electronic running state, and load motor is in electricity generation running state. Can be with the produced electric energy repayment of load motor to electric wire netting, the energy repayment of implementation system. The utility model discloses can accomplish the loading experiment to being surveyed the motor, the test with overload capacity is carried in the area before completion equipment dispatches from the factory. Additionally, the utility model discloses multiple load conditions can be simulated, the capability test to the different loadtypes of high -voltage inverter is realized.
Description
Technical field
The utility model relates to a kind of high voltage converter simulated machine load platform topological structure.
Background technology
Before frequency converter whole set equipment dispatches from the factory, need to test its load capacity, and need to carry out long-term run with load, with finishing equipment aging test and the overall performance verifying frequency converter.Therefore, the band solved when motor runs carries the key point that problem has become frequency converter system test, is the effective measures improving frequency converter ex factory pass rate.
Traditional aging test is that motor is in no-load running state by frequency converter Direct driver motor.The Driving Torque of motor is little, thus makes the output power of frequency converter and output current all very little, is difficult to the actual load capacity of effectively checking frequency converter.
At present, conventional load test mode mainly contains following several: (1) adopts direct current generator and power resistor to carry out fictitious load, and the energy that direct current generator produces all consumes on power resistor; (2) synchronous motor and Dyn. and grid-connecting apparatus is adopted to carry out fictitious load, can by the energy feedback of generation in electrical network; (3) dynamometer machine is adopted to carry out fictitious load.
, although the run with load of motor can be realized, all there is certain shortcoming in several load mode above.Wherein, method (1) and (3) all need to consume a large amount of energy, and this, for needing the device carrying out aging test for a long time, cannot realize energy-conserving and environment-protective and cost-saving object.Method (2) is although can by energy feedback in electrical network, and the method is comparatively large to the humorous wave interference of electrical network, easily affects the normal operation of miscellaneous equipment.
Utility model content
For overcoming the problems referred to above and shortcoming, the utility model proposes high voltage converter simulated machine load testing platform topological structure.Be characterized in, two motors realize mechanical Hard link by shaft coupling, are in motor-operated running state by measured motor, and load motor is in generator operation state, and load motor is driven by four-quadrant high voltage converter, can realize energy feedback.Therefore, the energy loss in test process is only the loss of motor itself, thus, improve the testing efficiency of equipment, reduce the energy loss in test process.In addition, load motor can different torque type set by four-quadrant high voltage converter and export corresponding electromagnetic torque, thus realizes the performance test of tested frequency converter in different loads situation.
For achieving the above object, the utility model is for realize by the following technical solutions.
A kind of high voltage converter simulated machine load platform topological structure, is characterized in that, comprise a universal high voltage converter, four-quadrant high voltage converter, by measured motor, load motor, shaft coupling and scrambler; Describedly be connected with universal high voltage converter by measured motor, described load motor is connected with four-quadrant high voltage converter; Described universal high voltage converter and four-quadrant high voltage converter are all connected in AC network; Described tested motor output shaft is connected by shaft coupling with described load motor output shaft; Described scrambler is used for the actual speed of testing of electric motors.
Described load motor is controlled by four-quadrant high voltage converter, and its rectifying part is three-phase bridge controlled rectification, and the electric energy feedback that load motor in operational process can be produced is to electrical network.
Described universal high voltage converter and four-quadrant high voltage converter are series H-bridge multi-level high voltage converter.
Compared with prior art, the utility model has the following advantages:
(1) the described connection by measured motor and load motor is mechanical Hard link, and torque responsing speed is fast, loads response speed also very fast, can meet the test request of frequency converter product in factory.
(2) motor that the utility model uses is threephase asynchronous machine, (forward negative sense all can any torque can be provided to export by the size of controlling torque electric current, and size is adjustable), when controlled, operate in generating state, realize the variation that motor loads test.
(3) the utility model adopts four-quadrant high voltage converter to drive load motor, when load motor is in generating state, the electric energy feedback that motor can be produced to electrical network, thus decreases the energy loss in test process, reduce financial cost, improve the testing efficiency of equipment.
(4) load motor can according to arranging the multiple loading condition of simulation, such as fans load, sudden change load etc., thus realize the performance test of tested frequency converter under multiple loading condition.
(5) this method can realize the loading of homophase generator operation, adopts closed-loop vector to control, and can realize low speed, middling speed and high torque (HT) at a high speed, high-precision loading.
The energy produced due to load motor can feed back to electrical network by four-quadrant high voltage converter, therefore, the energy loss of whole system is exactly mainly the total losses of various piece, mainly comprises the loss of electric machine, high voltage converter and line loss etc., effectively raises the utilization factor of energy.
The utility model is mainly used in simulated machine load testing platform, and motor can export any torque, makes electromechanical testing more diversified, and complete the performance test of high voltage converter in different loads situation, conserve energy, significantly improves testing efficiency.
Accompanying drawing explanation
Fig. 1 is system topology block diagram.
Fig. 2 is energy feedback four quadrant running schematic diagram.
Embodiment
Below by way of embodiment, and by reference to the accompanying drawings the utility model is described in detail.
See Fig. 1, simulated machine load platform of the present utility model comprise universal high voltage converter, four-quadrant high voltage converter, by measured motor, load motor, shaft coupling and scrambler.Describedly be connected with universal high voltage converter by measured motor, described load motor is connected with four-quadrant high voltage converter, is describedly connected by shaft coupling with the output shaft of load motor by measured motor, and described scrambler is used for the actual running speed of testing of electric motors.
As shown in Figure 1, after system electrification, grid alternating current inputs to two high voltage converters, after frequency converter frequency modulation, output to corresponding motor, as the driving power of motor.Two motors adopt shaft coupling mechanical connection.Described four-quadrant high voltage converter is energy feedback vector control type frequency converter, and two described motors are in motoring condition and generating state respectively.Described load motor should be in generating state, is connected, by energy feedback to electrical network with four-quadrant high voltage converter.Described universal high voltage converter is equipment under test, by the run with load regulating the torque current set-point of described four-quadrant high-pressure frequency-conversion to realize equipment under test.
See Fig. 2, described universal high voltage converter is operated in first and third quadrant, is in running status, and described four-quadrant high voltage converter is operated in second, four-quadrant, is in on-position.
What the utility model used is the asynchronous machine that two parameters are identical by measured motor and load motor, if the power of two motors can not be completely the same, also can adopt this programme, but power difference can not be too large.The output shaft of two motors is connected by shaft coupling, when connecting, two output shafts be kept as much as possible coaxial, and what can reduce like this to produce in motor rotary course rocks, and is of value to the accuracy improving test figure.
From the test philosophy of system, be in motoring condition by measured motor, drag load motor by shaft coupling and rotate, make load motor be in generating state.Like this, the energy that load motor produces just can feed back to electrical network by four-quadrant high voltage converter, thus decreases the energy loss in test process.
In the control system of four-quadrant high voltage converter, can different loadtypes be set, with the control performance of test frequency converter in different loads situation, as sudden change load and fan-type load etc.
The rotary speed information of motor is obtained by scrambler, makes the control of load motor more accurate.The output current of two frequency converters is all obtained by current sensor.
The loading procedure of system is mainly divided into following step:
(1) torque current arranging four-quadrant high voltage converter is zero, and now any action does not occur load motor, is in free state.
(2) run universal high voltage converter, reached given rotating speed by the running speed of measured motor, now, tested motor drag load motor rotates.Torque current due to four-quadrant high voltage converter is zero, so load motor does not have electromagnetic torque to export.
(3), after treating that motor stabilizing runs, four-quadrant high voltage converter starts according to the loadtype of setting the torque current providing negative sense, thus obtains the electromagnetic torque of negative sense.For by measured motor, now load strengthens gradually, for remaining constant by the invariablenes turning speed of measured motor, then by more torque electric current, makes it produce enough large electromagnetic torque.Load motor is that permanent torque controls, and torque current set-point is negative sense (namely producing negative sense torque), and because tested motor drag load motor rotates forward, therefore load motor is in generating state, and by energy feedback to electrical network.
In process of the test, oscillograph is utilized to observe the input side electric current of two motors.After starting to load, obviously increased by the input current of measured motor, and strengthen gradually along with the increase of load.In addition, oscillograph is utilized to observe when different loads type, by the curent change situation of measured motor.
In sum, the tested motor electromagnetic torque described in the utility model is just, rotating speed is just, is in motoring condition, and load motor electromagnetic torque is negative, and rotating speed is just, is in generating state.The output current of general high voltage converter when no-load running and when loading and output power have different significantly.Load energy can feed back to electrical network, and the electric energy of consumption is only the loss of two motors itself, decreases the energy loss of system, reduces the cost of equipment debugging.Described load motor according to the loadtype arranged, can export multiple electromagnetic torque, completes the performance test of tested frequency converter when different loads type.
Particularly point out, for those skilled in the art, all equivalences done for the content of the utility model the scope of the claims change and modify, all should as technology category of the present utility model.
Claims (3)
1. a high voltage converter simulated machine load platform topological structure, is characterized in that, comprise a universal high voltage converter, four-quadrant high voltage converter, by measured motor, load motor, shaft coupling and scrambler; Describedly be connected with universal high voltage converter by measured motor, described load motor is connected with four-quadrant high voltage converter; Described universal high voltage converter and four-quadrant high voltage converter are all connected in AC network; Described tested motor output shaft is connected by shaft coupling with described load motor output shaft; Described scrambler is used for the actual speed of testing of electric motors.
2. a kind of high voltage converter simulated machine load platform topological structure according to claim 1, it is characterized in that, described load motor is controlled by four-quadrant high voltage converter, its rectifying part is three-phase bridge controlled rectification, and the electric energy feedback that load motor in operational process can be produced is to electrical network.
3. a kind of high voltage converter simulated machine load platform topological structure according to claim 1, it is characterized in that, described universal high voltage converter and four-quadrant high voltage converter are series H-bridge multi-level high voltage converter.
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| CN201520817965.XU CN205080211U (en) | 2015-10-21 | 2015-10-21 | High -voltage inverter simulation motor load platform topological structure |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105699823A (en) * | 2016-03-29 | 2016-06-22 | 无锡市大元广盛电气股份有限公司 | Energy-saving frequency converter loading system and energy-saving frequency converter loading method |
| CN108646113A (en) * | 2018-06-06 | 2018-10-12 | 广东明阳龙源电力电子有限公司 | A kind of high-pressure transducer testing system |
| CN109142928A (en) * | 2018-08-28 | 2019-01-04 | 惠州市金田科技有限公司 | A kind of frequency converter is to dragging test method |
| CN109507588A (en) * | 2019-01-08 | 2019-03-22 | 黄东松 | A kind of energy-saving electrical machine band load pilot system |
| CN110044615A (en) * | 2019-05-09 | 2019-07-23 | 湖南大学 | A kind of dynamically load electric machine control system and its application method |
| CN111413568A (en) * | 2020-04-24 | 2020-07-14 | 上海辛格林纳新时达电机有限公司 | Frequency converter test system and frequency converter test method |
| CN111458636A (en) * | 2020-04-03 | 2020-07-28 | 中国航发哈尔滨东安发动机有限公司 | High-speed permanent magnet motor loading device |
| CN112881852A (en) * | 2021-03-25 | 2021-06-01 | 广东卓梅尼技术股份有限公司 | Elevator variable frequency driver test system |
| CN114838855A (en) * | 2022-05-10 | 2022-08-02 | 上海电机系统节能工程技术研究中心有限公司 | Dynamometer device and system for motor drag test |
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2015
- 2015-10-21 CN CN201520817965.XU patent/CN205080211U/en active Active
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105699823A (en) * | 2016-03-29 | 2016-06-22 | 无锡市大元广盛电气股份有限公司 | Energy-saving frequency converter loading system and energy-saving frequency converter loading method |
| CN105699823B (en) * | 2016-03-29 | 2019-06-04 | 无锡市大元广盛电气股份有限公司 | A kind of energy-efficient frequency converter loading method |
| CN108646113A (en) * | 2018-06-06 | 2018-10-12 | 广东明阳龙源电力电子有限公司 | A kind of high-pressure transducer testing system |
| CN109142928A (en) * | 2018-08-28 | 2019-01-04 | 惠州市金田科技有限公司 | A kind of frequency converter is to dragging test method |
| CN109507588A (en) * | 2019-01-08 | 2019-03-22 | 黄东松 | A kind of energy-saving electrical machine band load pilot system |
| CN110044615A (en) * | 2019-05-09 | 2019-07-23 | 湖南大学 | A kind of dynamically load electric machine control system and its application method |
| CN111458636A (en) * | 2020-04-03 | 2020-07-28 | 中国航发哈尔滨东安发动机有限公司 | High-speed permanent magnet motor loading device |
| CN111458636B (en) * | 2020-04-03 | 2022-04-01 | 中国航发哈尔滨东安发动机有限公司 | High-speed permanent magnet motor loading device |
| CN111413568A (en) * | 2020-04-24 | 2020-07-14 | 上海辛格林纳新时达电机有限公司 | Frequency converter test system and frequency converter test method |
| CN112881852A (en) * | 2021-03-25 | 2021-06-01 | 广东卓梅尼技术股份有限公司 | Elevator variable frequency driver test system |
| CN114838855A (en) * | 2022-05-10 | 2022-08-02 | 上海电机系统节能工程技术研究中心有限公司 | Dynamometer device and system for motor drag test |
| CN114838855B (en) * | 2022-05-10 | 2024-03-01 | 上海电机系统节能工程技术研究中心有限公司 | Dynamometer device and system for motor opposite-dragging test |
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Address after: 114051 Anshan high tech Zone, Liaoning province science and technology road, No. 108 Patentee after: Wolong electric group Liaoning Rongxin electric drive Co., Ltd. Address before: 114051 Anshan high tech Zone, Liaoning province science and technology road, No. 108 Patentee before: Liaoning Rongxin Electric Drive Technology Co., Ltd. |
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| TR01 | Transfer of patent right |
Effective date of registration: 20210415 Address after: 312000 Economic Development Zone, Shangyu District, Shaoxing City, Zhejiang Province Patentee after: WOLONG ELECTRIC GROUP Co.,Ltd. Patentee after: WOLONG ELECTRIC GROUP LIAONING RONGXIN ELECTRIC TRANSMISSION Co.,Ltd. Address before: 114051 No. 108, science and technology road, hi tech Zone, Liaoning, Anshan Patentee before: WOLONG ELECTRIC GROUP LIAONING RONGXIN ELECTRIC TRANSMISSION Co.,Ltd. |
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| TR01 | Transfer of patent right |