CN103511396A - Hydraulic pump and hydraulic motor reliability testing device based on power recovery technology - Google Patents
Hydraulic pump and hydraulic motor reliability testing device based on power recovery technology Download PDFInfo
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- CN103511396A CN103511396A CN201310394569.6A CN201310394569A CN103511396A CN 103511396 A CN103511396 A CN 103511396A CN 201310394569 A CN201310394569 A CN 201310394569A CN 103511396 A CN103511396 A CN 103511396A
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- 238000012360 testing method Methods 0.000 title claims abstract description 27
- 238000011084 recovery Methods 0.000 title claims abstract description 13
- 238000005516 engineering process Methods 0.000 title claims abstract description 10
- 230000001105 regulatory effect Effects 0.000 claims abstract description 12
- 239000012530 fluid Substances 0.000 claims description 32
- 239000000945 filler Substances 0.000 claims description 12
- 239000002828 fuel tank Substances 0.000 claims description 3
- 239000003921 oil Substances 0.000 abstract description 148
- 239000010720 hydraulic oil Substances 0.000 abstract 3
- 238000001125 extrusion Methods 0.000 abstract 2
- 230000004907 flux Effects 0.000 description 24
- 230000009183 running Effects 0.000 description 10
- 230000002159 abnormal effect Effects 0.000 description 4
- 239000010705 motor oil Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 2
- 239000010729 system oil Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000011897 real-time detection Methods 0.000 description 1
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Abstract
本发明公开一种基于功率回收技术的液压泵及液压马达可靠性试验装置，该试验装置的双伸出杆电机的第一轴伸通过第一扭矩转速仪与第一液压泵连接，双伸出杆电机的第二轴伸连接第二液压马达；第二扭矩转速仪连接第一液压马达和第二液压泵，第一液压泵的压力油口连接第一液压马达的进油口，第二液压泵的压力油口连接两条液压油管线，第一条液压油管线连接电磁溢流阀和远程调压阀并经过流量计与油箱连接，第二条液压油管线连接第二液压马达的进油口。本发明通过一台双伸出杆电动机同时建立2台被试液压泵样本和2台被试液压马达样本，节能的同时大大提高了试验效率，本发明还具有控制简单、易于推广的优点。
The invention discloses a hydraulic pump and hydraulic motor reliability test device based on power recovery technology. In the test device, the first shaft extension of the double-extrusion rod motor is connected with the first hydraulic pump through the first torque tachometer. The second shaft extension of the rod motor is connected to the second hydraulic motor; the second torque tachometer is connected to the first hydraulic motor and the second hydraulic pump, the pressure oil port of the first hydraulic pump is connected to the oil inlet of the first hydraulic motor, and the second hydraulic pressure The pressure oil port of the pump is connected to two hydraulic oil pipelines, the first hydraulic oil pipeline is connected to the electromagnetic overflow valve and remote pressure regulating valve and connected to the oil tank through the flow meter, and the second hydraulic oil pipeline is connected to the oil inlet of the second hydraulic motor mouth. In the present invention, two hydraulic pump samples to be tested and two hydraulic motor samples to be tested are simultaneously established through a double-extrusion rod motor, which greatly improves the test efficiency while saving energy. The present invention also has the advantages of simple control and easy popularization.
Description
Technical field
The present invention relates to a kind of testing apparatus that detects oil hydraulic pump and oil hydraulic motor reliability index, particularly a kind of oil hydraulic pump and oil hydraulic motor reliability test based on power recovery technology.
Background technique
Oil hydraulic pump is as the power original paper of hydraulic system, and its reliability level is directly connected to the reliability and security of whole hydraulic system, for guaranteeing oil hydraulic pump quality, need to carry out reliability trial to it.The domestic standard about oil hydraulic pump, oil hydraulic motor reliability trial is not perfect at present, the axial piston pump test loop that generally recommend with reference to JB/T7043-2006 in oil hydraulic pump reliability trial loop, the number of samples that this kind of scheme set up by single motor is few, oil hydraulic pump reliability trial for multisample, this kind of scheme causes huge power consumption, and corresponding experimentation cost also can increase.
Summary of the invention
For addressing the above problem, the invention provides a kind of oil hydraulic pump and oil hydraulic motor reliability test based on power recovery technology, this testing apparatus adopts a kind of mode of cyclic loading to form oil hydraulic pump and oil hydraulic motor reliability test system, this testing apparatus can be set up 2 tested oil hydraulic pumps and 2 tested oil hydraulic motor samples by 1 motor simultaneously, both electric energy can be saved, and experimentation cost can be reduced again.
Technological scheme of the present invention is achieved in that a kind of oil hydraulic pump and oil hydraulic motor reliability test based on power recovery technology, comprise hydraulic fluid pipeline and various temperature, pressure, flow measuring device, it is characterized in that: this device also comprises two extension bar motor, the first oil hydraulic pump, the second oil hydraulic pump, the first oil hydraulic motor, the second oil hydraulic motor, electromagnetic relief valve, remote pressure regulating valve, the first moment of torsion rotational speed meters, the second moment of torsion rotational speed meters, the first shaft extension of two extension bar motors is connected with the first oil hydraulic pump by the first moment of torsion rotational speed meters, the second shaft extension of two extension bar motors connects the second oil hydraulic motor, the second moment of torsion rotational speed meters connects the first oil hydraulic motor and the second oil hydraulic pump, the pressure hydraulic fluid port of the first oil hydraulic pump connects the filler opening of the first oil hydraulic motor, the pressure hydraulic fluid port of the second oil hydraulic pump connects two hydraulic fluid pipelines, article one, hydraulic fluid pipeline Bonding pressure sensor, pressure gauge, electromagnetic relief valve is connected with fuel tank with remote pressure regulating valve and through flowmeter, second hydraulic fluid pipeline connects the filler opening of the second oil hydraulic motor, electromagnetic relief valve and remote pressure regulating valve are that the second oil hydraulic pump loads, the second oil hydraulic pump is that the first oil hydraulic motor loads, the first oil hydraulic motor is that the first oil hydraulic pump loads, the second oil hydraulic motor is as Power Recovery device, its load is two extension bar motors.
The filler opening Bonding pressure table of the first oil hydraulic pump of the present invention, leaks hydraulic fluid port and connects successively temperature transducer, flowmeter, pressure hydraulic fluid port Bonding pressure sensor; The leakage hydraulic fluid port of described the first oil hydraulic motor connects temperature transducer, flowmeter, and return opening connects temperature transducer, flowmeter; The filler opening Bonding pressure table of described the second oil hydraulic pump, leaks hydraulic fluid port and connects temperature transducer, flowmeter; The leakage hydraulic fluid port of described the second oil hydraulic motor connects temperature transducer, flowmeter, and return opening connects temperature transducer, flowmeter.
Beneficial effect of the present invention is as follows:
(1) by 1 motor, can set up 2 tested oil hydraulic pump samples and 2 tested motor samples simultaneously, increase test sample, improve test efficiency;
(2) power recovery technology is applied in reliability trial, has saved energy consumption;
(3) testing apparatus carries out Real-Time Monitoring in different position installation multiple sensors to the running state of oil hydraulic pump and oil hydraulic motor, can make accurate judgement to failure condition;
(4) by reducing the discharge capacity of loading system oil hydraulic motor, can improve the rotating speed of loading system oil hydraulic motor and oil hydraulic pump, can improve rotating speed stress;
(5) the present invention also has advantages of that control is simple, is easy to promote.
Accompanying drawing explanation
Fig. 1 is oil hydraulic pump and oil hydraulic motor reliability trial hydraulic system principle figure.
Embodiment
Referring to Fig. 1, oil hydraulic pump and the oil hydraulic motor reliability test of example of the present invention based on power recovery technology comprises: two extension bar motor 1, the first moment of torsion rotational speed meters 2, the first oil hydraulic pump 3, pressure gauge 4, temperature transducer 5, flowmeter 6, pressure transducer 7, flowmeter 8, temperature transducer 9, flowmeter 10, temperature transducer 11, the first oil hydraulic motor 12, the second moment of torsion rotational speed meters 13, the second oil hydraulic pump 14, pressure gauge 15, temperature transducer 16, flowmeter 17, pressure transducer 18, pressure gauge 19, electromagnetic relief valve 20, remote pressure regulating valve 21, flowmeter 22, the second oil hydraulic motor 23, temperature transducer 24, flowmeter 25, temperature transducer 26, flowmeter 27.The first shaft extension of two extension bar motors 1 is connected with the first oil hydraulic pump 3 by the first moment of torsion rotational speed meters 2, and the second shaft extension of two extension bar motors 1 connects the second oil hydraulic motor 23; The second moment of torsion rotational speed meters 13 connects the first oil hydraulic motor 12 and the second oil hydraulic pump 14, the pressure hydraulic fluid port of the first oil hydraulic pump 3 connects the filler opening of the first oil hydraulic motor 12, the pressure hydraulic fluid port of the second oil hydraulic pump 14 connects two hydraulic fluid pipelines, article one, hydraulic fluid pipeline Bonding pressure sensor 18, pressure gauge 19, electromagnetic relief valve 20, remote pressure regulating valve 21, and be connected with fuel tank by flowmeter 22, second hydraulic fluid pipeline connects the filler opening of the second oil hydraulic motor 23.Electromagnetic relief valve 20 and remote pressure regulating valve 21 are that the second oil hydraulic pump 14 loads, the second oil hydraulic pump 14 is that the first oil hydraulic motor 12 loads, the first oil hydraulic motor 12 is that the first oil hydraulic pump 3 loads, and the second oil hydraulic motor 23 is as Power Recovery device, and its load is two extension bar motors 1.
The filler opening Bonding pressure table 4 of the first oil hydraulic pump 3 of the present invention, be used for observing the oil suction pressure of oil hydraulic pump, leak hydraulic fluid port and connect successively temperature transducer 5, flowmeter 6, be used for respectively detected temperatures signal and flux signal, pressure hydraulic fluid port Bonding pressure sensor 7, is used for detecting oil port pressure signal; The leakage hydraulic fluid port of the first oil hydraulic motor 12 connects temperature transducer 9, flowmeter 8, is used for respectively detecting leaking oil temperature signal and flux signal, and return opening connects temperature transducer 11, flowmeter 10, is used for respectively detecting motor returning-oil temperature signal and flux signal; The filler opening Bonding pressure table 15 of the second oil hydraulic pump 14, is used for observing oil suction pressure, leaks hydraulic fluid port and connects temperature transducer 16, flowmeter 17, is used for respectively detecting leakage oil temperature signal and flux signal; The leakage hydraulic fluid port of the second oil hydraulic motor 23 connects temperature transducer 24, flowmeter 25, be used for respectively detecting leakage oil temperature signal and flux signal, return opening connects temperature transducer 26, flowmeter 27, is used for respectively detecting motor returning-oil temperature signal and flux signal.
On testing apparatus of the present invention, carry out the reliability trial of oil hydraulic pump and oil hydraulic motor, comprise the following steps:
The first step is carried out no-load test on designed testing apparatus, and records correlation test data, that is:
(1) 1DT dead electricity, remote pressure regulating valve 21 off-loads, start two extension bar motors 1.
(2) first oil hydraulic pumps 3 in no-load running state, now detect output speed signal and the torque signal of two extension bar motors 1 under the driving of motor by moment of torsion rotational speed meters 2; By pressure gauge 4, observe the oil suction pressure of the first oil hydraulic pump 3, by 6 pairs, flowmeter, leak oily flow and detect, by 7 pairs of oil outlet place pressure of pressure transducer, detect.
(3) first oil hydraulic motor 12 no-load runnings under the driving of the first oil hydraulic pump 3, now by moment of torsion rotational speed meters 13, detect motor output speed signal and torque signal, by flowmeter 8, detect and leak oily flux signal, by flowmeter 10, detect motor oil return flux signal.
(4) second oil hydraulic pumps 14 under the driving of the first oil hydraulic motor 12 in no-load running state, now by pressure gauge 15, observe the inlet port pressure of oil hydraulic pump, by pressure transducer 18, detect oil hydraulic pump oil outlet place pressure signal, by flowmeter 17, detect and leak oily flux signal, by flowmeter 22, detect charge valve downstream part flux signal.
(5) second oil hydraulic motors 23 in no-load running state, are now detected and are leaked oily flux signal by flowmeter 25 under the driving of the second oil hydraulic pump 14, by flowmeter 27, detect motor oil return flux signal.
Second step loads on the basis of no-load test, and gathers load test data, that is:
(1) 1DT obtains electricly, regulates remote pressure regulating valve 21 to system pressure to reach specified testing pressure.
(2) first oil hydraulic pumps 3 in load operating state, now detect output speed signal and the torque signal of two extension bar motors 1 under the driving of motor by moment of torsion rotational speed meters 2; By pressure gauge 4, observe the oil suction pressure of the first oil hydraulic pump 3, by 5 pairs of temperature transducers, leak oil temperature and detect, by 6 pairs, flowmeter, leak oily flow and detect, by 7 pairs of oil outlet place pressure of pressure transducer, detect.
(3) first oil hydraulic motors 12 under the driving of the first oil hydraulic pump 3 in loaded state, now by moment of torsion rotational speed meters 13, detect motor output speed signal and torque signal, by temperature transducer 9, detect and leak oil temperature signal, by flowmeter 8, detect and leak oily flux signal, by temperature transducer 11, detect motor returning-oil temperature signal, by flowmeter 10, detect motor oil return flux signal.
(4) second oil hydraulic pumps 14 under the driving of the first oil hydraulic motor 12 in load operating state, now by the inlet port pressure of pressure gauge 15 observation oil hydraulic pumps, by pressure transducer 18, detect oil hydraulic pump oil outlet place pressure signal, by temperature transducer 16, detect and leak oil temperature signal, by flowmeter 17, detect and leak oily flux signal, by flowmeter 22, detect charge valve downstream part flux signal.
(5) second oil hydraulic motors 23 under the driving of the second oil hydraulic pump 14 in load operating state, now by temperature transducer 24, detect and leak oil temperature signal, by flowmeter 25, detect and leak oily flux signal, by temperature transducer 26, detect motor returning-oil temperature signal, by flowmeter 27, detect motor oil return flux signal.
The 3rd step, analyzes the test data under the loading environment of second step collection, real-time detection failure, that is:
(1) according to oil hydraulic pump and oil hydraulic motor volumetric efficiency formula, detect in real time the volumetric efficiency of the first oil hydraulic pump 3, the second oil hydraulic pump 14, the first oil hydraulic motor 12 and the second oil hydraulic motor 23, when a certain oil hydraulic pump or oil hydraulic motor volumetric efficiency are during lower than specified value, record this pump or motor accumulated running time.
(2) detect in real time leakage oil temperature signal, the flux signal of the first oil hydraulic pump 3, pressure oil port pressure signal, when some values occur when abnormal, records the first oil hydraulic pump 3 accumulated running time.
(3) detect in real time the first oil hydraulic motor 12 leakage oil temperature signal, leak oily flux signal, returning-oil temperature signal, oil return flux signal, when some values occur when abnormal, record the first oil hydraulic motor 12 accumulated running time.
(4) detect in real time the second oil hydraulic pump 14 leakage oil temperature signal, leak oily flux signal, pressure oil port pressure signal, when some values occur when abnormal, record the second oil hydraulic pump 14 accumulated running time.
(5) detect in real time the second oil hydraulic motor 23 leakage oil temperature signal, leak oily flux signal, returning-oil temperature signal, oil return flux signal, when some values occur when abnormal, record the second oil hydraulic motor 23 accumulated running time.
The 4th step, to carrying out statistical process the Mean time to failure of the 3rd step gained, draws the reliability characteristic value of oil hydraulic pump and oil hydraulic motor.
Claims (2)
1. oil hydraulic pump and the oil hydraulic motor reliability test based on power recovery technology, comprise hydraulic fluid pipeline and various temperature, pressure, flow measuring device, it is characterized in that: this device also comprises two extension bar motor, the first oil hydraulic pump, the second oil hydraulic pump, the first oil hydraulic motor, the second oil hydraulic motor, electromagnetic relief valve, remote pressure regulating valve, the first moment of torsion rotational speed meters, the second moment of torsion rotational speed meters, the first shaft extension of two extension bar motors is connected with the first oil hydraulic pump by the first moment of torsion rotational speed meters, the second shaft extension of two extension bar motors connects the second oil hydraulic motor, the second moment of torsion rotational speed meters connects the first oil hydraulic motor and the second oil hydraulic pump, the pressure hydraulic fluid port of the first oil hydraulic pump connects the filler opening of the first oil hydraulic motor, the pressure hydraulic fluid port of the second oil hydraulic pump connects two hydraulic fluid pipelines, article one, hydraulic fluid pipeline Bonding pressure sensor, pressure gauge, electromagnetic relief valve is connected with fuel tank with remote pressure regulating valve and through flowmeter, second hydraulic fluid pipeline connects the filler opening of the second oil hydraulic motor, electromagnetic relief valve and remote pressure regulating valve are that the second oil hydraulic pump loads, the second oil hydraulic pump is that the first oil hydraulic motor loads, the first oil hydraulic motor is that the first oil hydraulic pump loads, the second oil hydraulic motor is as Power Recovery device, its load is two extension bar motors.
2. oil hydraulic pump and the oil hydraulic motor reliability test based on power recovery technology according to claim 1, it is characterized in that: the filler opening Bonding pressure table of described the first oil hydraulic pump, leak hydraulic fluid port and connect successively temperature transducer, flowmeter, pressure hydraulic fluid port Bonding pressure sensor; The leakage hydraulic fluid port of described the first oil hydraulic motor connects temperature transducer, flowmeter, and return opening connects temperature transducer, flowmeter; The filler opening Bonding pressure table of described the second oil hydraulic pump, leaks hydraulic fluid port and connects temperature transducer, flowmeter; The leakage hydraulic fluid port of described the second oil hydraulic motor connects temperature transducer, flowmeter, and return opening connects temperature transducer, flowmeter.
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| CN201310394569.6A CN103511396B (en) | 2013-09-03 | 2013-09-03 | Based on oil hydraulic pump and the oil hydraulic motor reliability test of power recovery technology |
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| CN201310394569.6A CN103511396B (en) | 2013-09-03 | 2013-09-03 | Based on oil hydraulic pump and the oil hydraulic motor reliability test of power recovery technology |
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| CN103511396B CN103511396B (en) | 2016-01-20 |
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Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103775436A (en) * | 2014-01-21 | 2014-05-07 | 燕山大学 | Modularly-parallel, multi-machine and energy-saving reliability testing device for hydraulic pumps and hydraulic motors |
| CN104074839A (en) * | 2014-06-30 | 2014-10-01 | 南京创贝高速传动机械有限公司 | Hydraulic motor testbed |
| CN104154064A (en) * | 2014-08-06 | 2014-11-19 | 昆明理工大学 | Hydraulic control loop achieving cyclic loading |
| CN104454791A (en) * | 2014-12-05 | 2015-03-25 | 宁波恒力液压股份有限公司 | Parallel-energy-saving-technology-based hydraulic device for testing durability of hydraulic pumps and overflow valves |
| CN104481974A (en) * | 2014-12-19 | 2015-04-01 | 上海电气液压气动有限公司 | Performance test system for closed hydraulic pump |
| CN104481972A (en) * | 2014-12-19 | 2015-04-01 | 上海电气液压气动有限公司 | Load sensitive test system for closed hydraulic pump |
| CN104481973A (en) * | 2014-12-19 | 2015-04-01 | 上海电气液压气动有限公司 | Impact performance test system for closed hydraulic pump |
| CN105697353A (en) * | 2016-01-21 | 2016-06-22 | 燕山大学 | Comprehensive testing device for fault simulation and state detection for hydraulic pump under variable working condition |
| CN105782166A (en) * | 2016-05-18 | 2016-07-20 | 吉林大学 | Energy-saving type hydraulic pump durability testing table with hydraulic analog loading |
| CN106124189A (en) * | 2016-08-29 | 2016-11-16 | 中国人民解放军空军第航空学院 | Novel emergency oil pump detection device |
| KR20170066074A (en) * | 2015-12-04 | 2017-06-14 | 두산인프라코어 주식회사 | Hydraulic control apparatus and hydraulic control method for construction machine |
| CN107140514A (en) * | 2017-06-29 | 2017-09-08 | 广东工业大学 | An energy-saving hydraulic escalator |
| CN107165893A (en) * | 2017-06-22 | 2017-09-15 | 镇江四联机电科技有限公司 | A kind of inexpensive multifunctional solution compression testing device |
| CN110878781A (en) * | 2019-11-22 | 2020-03-13 | 中铁高新工业股份有限公司 | Shield constructs quick-witted pump-motor combined test platform |
| CN111156226A (en) * | 2020-03-02 | 2020-05-15 | 谯维智 | A Hydraulic Power Conversion Device Control System Not Influenced by Load |
| CN112555234A (en) * | 2019-09-10 | 2021-03-26 | 上海中车艾森迪海洋装备有限公司 | Automatic pressure regulating system for regulating oil leakage pressure of underwater operation equipment |
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|---|---|---|---|---|
| CN103775436A (en) * | 2014-01-21 | 2014-05-07 | 燕山大学 | Modularly-parallel, multi-machine and energy-saving reliability testing device for hydraulic pumps and hydraulic motors |
| CN104074839A (en) * | 2014-06-30 | 2014-10-01 | 南京创贝高速传动机械有限公司 | Hydraulic motor testbed |
| CN104154064A (en) * | 2014-08-06 | 2014-11-19 | 昆明理工大学 | Hydraulic control loop achieving cyclic loading |
| CN104454791A (en) * | 2014-12-05 | 2015-03-25 | 宁波恒力液压股份有限公司 | Parallel-energy-saving-technology-based hydraulic device for testing durability of hydraulic pumps and overflow valves |
| CN104481972B (en) * | 2014-12-19 | 2017-01-11 | 上海电气液压气动有限公司 | Load sensitive test system for closed hydraulic pump |
| CN104481973A (en) * | 2014-12-19 | 2015-04-01 | 上海电气液压气动有限公司 | Impact performance test system for closed hydraulic pump |
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| CN104481974B (en) * | 2014-12-19 | 2017-09-12 | 上海电气液压气动有限公司 | Closed Hydraulic Pump Characteristic Test System |
| KR20170066074A (en) * | 2015-12-04 | 2017-06-14 | 두산인프라코어 주식회사 | Hydraulic control apparatus and hydraulic control method for construction machine |
| KR102514523B1 (en) | 2015-12-04 | 2023-03-27 | 현대두산인프라코어 주식회사 | Hydraulic control apparatus and hydraulic control method for construction machine |
| CN108368692A (en) * | 2015-12-04 | 2018-08-03 | 斗山英维高株式会社 | The hydraulic control device and hydraulic control method of engineering machinery |
| CN105697353B (en) * | 2016-01-21 | 2017-11-24 | 燕山大学 | A kind of variable working condition Hydraulic pump fault simulation and state-detection combined test apparatus |
| CN105697353A (en) * | 2016-01-21 | 2016-06-22 | 燕山大学 | Comprehensive testing device for fault simulation and state detection for hydraulic pump under variable working condition |
| CN105782166A (en) * | 2016-05-18 | 2016-07-20 | 吉林大学 | Energy-saving type hydraulic pump durability testing table with hydraulic analog loading |
| CN106124189A (en) * | 2016-08-29 | 2016-11-16 | 中国人民解放军空军第航空学院 | Novel emergency oil pump detection device |
| CN107165893A (en) * | 2017-06-22 | 2017-09-15 | 镇江四联机电科技有限公司 | A kind of inexpensive multifunctional solution compression testing device |
| CN107140514A (en) * | 2017-06-29 | 2017-09-08 | 广东工业大学 | An energy-saving hydraulic escalator |
| CN112555234A (en) * | 2019-09-10 | 2021-03-26 | 上海中车艾森迪海洋装备有限公司 | Automatic pressure regulating system for regulating oil leakage pressure of underwater operation equipment |
| CN110878781A (en) * | 2019-11-22 | 2020-03-13 | 中铁高新工业股份有限公司 | Shield constructs quick-witted pump-motor combined test platform |
| CN110878781B (en) * | 2019-11-22 | 2021-10-22 | 中铁高新工业股份有限公司 | Shield constructs quick-witted pump-motor combined test platform |
| CN111156226A (en) * | 2020-03-02 | 2020-05-15 | 谯维智 | A Hydraulic Power Conversion Device Control System Not Influenced by Load |
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