CN111076938B - Control method of starter load control system based on electric dynamometer - Google Patents
Control method of starter load control system based on electric dynamometer Download PDFInfo
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- CN111076938B CN111076938B CN201911391976.5A CN201911391976A CN111076938B CN 111076938 B CN111076938 B CN 111076938B CN 201911391976 A CN201911391976 A CN 201911391976A CN 111076938 B CN111076938 B CN 111076938B
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- 239000007858 starting material Substances 0.000 title claims abstract description 94
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- 230000003044 adaptive effect Effects 0.000 claims abstract description 23
- 230000007704 transition Effects 0.000 claims description 10
- 238000004891 communication Methods 0.000 claims description 6
- 238000012360 testing method Methods 0.000 abstract description 16
- 230000007547 defect Effects 0.000 abstract description 11
- 230000008569 process Effects 0.000 abstract description 11
- 230000007613 environmental effect Effects 0.000 abstract description 4
- 238000002485 combustion reaction Methods 0.000 description 6
- 239000000498 cooling water Substances 0.000 description 6
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- 239000007787 solid Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M15/00—Testing of engines
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Abstract
A control method of a starter load control system based on an electric dynamometer comprises a tested starter, an electric dynamometer host, a rotating speed encoder, a torque flange, an adaptive coupler, an upper computer, a closed-loop control lower computer and a four-quadrant operation frequency converter; the tested starter shafting is connected with one end of an adaptive coupler, the other end of the adaptive coupler is horizontally connected with a torque flange, the torque flange is horizontally connected with an electric dynamometer host, and the electric dynamometer host is connected with a rotating speed encoder; the torque flange is connected with an upper computer, the electric dynamometer host is respectively connected with a closed-loop control lower computer and a four-quadrant operation frequency converter, the closed-loop control lower computer is respectively and electrically connected with a rotating speed encoder and the four-quadrant operation frequency converter, and the upper computer is electrically connected with the closed-loop control lower computer; the invention simulates the resistance of the main engine to the starter, accurately controls the rotating speed in the starting process, measures and records parameters such as torque, rotating speed and the like, tests the performance of the starter, and solves the control defect and the environmental protection defect.
Description
Technical Field
The invention belongs to the technical field of testing, relates to various internal combustion engines, aeroengines, starters and other technologies, and particularly relates to a control method of a starter load control system based on an electric dynamometer.
Background
In the starting process of various internal combustion engines and aeroengines, firstly, a starter matched with the internal combustion engine and the aeroengine is started, the engine corresponds to the load of the starter, and the starter outputs a rotating speed to drive the engine to start. After the engine is started, the starter stops working.
At present, an electric vortex dynamometer is generally adopted in a test system widely used for starter load, the electric vortex dynamometer cannot be actively dragged, and intervention cannot be adopted when the actual rotating speed is lower than the target rotating speed. And one part of the solar energy is a rack of an electric dynamometer, braking chopping is adopted when energy generated by loading braking is processed, the energy is converted into direct current, and the direct current is consumed by using heat generated by a resistor box, so that energy waste is caused, and the greenhouse effect is increased.
Disclosure of Invention
In view of the above, in order to solve the above-mentioned shortcomings of the prior art, the present invention aims to provide a control method of a starter load control system based on an electric dynamometer, which simulates the resistance of a main engine to a starter according to the working state of the starter and the main engine when the starter and the main engine are used in combination, accurately controls the rotational speed during starting, measures parameters such as torque and rotational speed, and tests the performance of the starter; solves the defects of control defect, environmental protection defect and the like in the prior art.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
A control method of a starter load control system based on an electric power dynamometer comprises a tested starter, and further comprises an electric power dynamometer host, a rotating speed encoder, a torque flange, an adaptive coupling, an upper computer, a closed-loop control lower computer and a four-quadrant operation frequency converter; the tested starter shafting is connected with one end of the adaptive coupler, the other end of the adaptive coupler is horizontally connected with the torque flange, the torque flange is horizontally connected with the electric dynamometer host, the electric dynamometer host is connected with the rotating speed encoder, and the tested starter, the adaptive coupler, the torque flange and the electric dynamometer host are all arranged on the mounting base;
The torque flange is connected with an upper computer, the electric dynamometer host is respectively connected with a closed-loop control lower computer and a four-quadrant operation frequency converter, the closed-loop control lower computer is respectively and electrically connected with a rotating speed encoder and the four-quadrant operation frequency converter, and the upper computer is electrically connected with the closed-loop control lower computer;
The control method comprises the following steps:
S1: on a man-machine interface of an upper computer, controlling the system to start and stop, displaying real-time values of the rotating speed and the torque parameters, recording and storing the real-time values of the rotating speed and the torque parameters, giving a rotating speed target value of a lower computer under closed loop control, setting a rotating speed and torque parameter alarm value according to the performance requirement of a tested starter, and actively controlling the system to stop when the real-time values of the rotating speed and the torque parameters reach the alarm value;
S2: the upper computer gives a signal for controlling the lower computer to start the electric power dynamometer host computer in a closed loop mode through communication, the lower computer is controlled by the closed loop control to control the four-quadrant operation frequency converter to drive the electric power dynamometer host computer to start, and after the electric power dynamometer host computer is started, the target rotating speed is given to be 0rpm, so that the system is in a standby state;
S3: under the condition that the system is in a standby state, starting a tested starter, and setting a target rotating speed by an upper computer, wherein the upper computer sets a target rotating speed of a lower computer in a closed loop control mode through a communication mode;
S4: after the tested starter is started, the rotating speed of the tested starter is transmitted to a rotating speed encoder end in a speed ratio of 1:1, and the rotating speed measured by the rotating speed encoder is the rotating speed of the tested starter; the lower computer is controlled in a closed loop to collect the rotating speed measured by the rotating speed encoder, and the four-quadrant operation frequency converter is controlled to drive the electric dynamometer host to reach the target rotating speed through closed loop operation.
Further, a transition support is arranged between the tested starter and the adaptive coupler.
Further, the four-quadrant operation frequency converter provides driving for the electric dynamometer host, and the electric dynamometer host simulates a main engine to provide load for a tested starter.
Furthermore, the upper computer is provided with a human-computer interface, and is connected with the tested starter.
Further, the torque flange measures the torque output by the tested starter and transmits the torque to the upper computer.
Furthermore, shafting connection modes are adopted among the tested starter, the adaptive coupler, the torque flange, the rotating speed encoder and the electric dynamometer host.
The beneficial effects of the invention are as follows:
In the starting process of various internal combustion engines and aeroengines, firstly, a starter matched with the internal combustion engine and the aeroengine is started, the engine corresponds to the load of the starter, and the starter outputs a rotating speed to drive the engine to start. After the engine is started, the starter stops working. According to the technical scheme of the invention, the resistance of the main engine to the starter can be simulated according to the working state of the starter and the main engine when the starter and the main engine are used in combination, the rotating speed is accurately controlled in the starting process, parameters such as torque, rotating speed and the like are measured and recorded, the performance of the starter is tested, and the defects of control defects, environmental protection defects and the like in the prior art are overcome. The specific expression is as follows:
1. The four-quadrant operation frequency converter is adopted to drive the electric dynamometer host to control the rotating speed, the electric dynamometer host has the function which is not possessed by the electric vortex dynamometer, the electric vortex dynamometer host can be actively dragged and passively loaded, the rotating speed is better controlled in a required rotating speed interval, the control effect is better, and the electric vortex dynamometer host is stable and reliable;
2. the system is simple to install, a cooling water path is not required to be designed, and a cooling water tower is not required to be built; the cost of circulating cooling water and the cost of waterway maintenance are saved during working. Once input, once and for all;
3. when the braking is loaded, the mechanical energy is converted into electric energy, the electric energy is fed back to the power grid, the feeding quality is high, the energy is recycled, and the electric energy is saved for users; and heat production and consumption are not needed, and the harm of greenhouse effect is reduced.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a main machine side structure of an electric dynamometer;
FIG. 2 is a schematic diagram of the system;
FIG. 3 is a time-axis graph of a test starter speed;
The marks in the figure: 1. the power meter comprises an electric power meter host, a rotating speed encoder, a torque flange, an adaptive coupler, a transition support, a mounting base, a tested starter, an upper computer, a closed-loop control lower computer and a four-quadrant operation frequency converter, wherein the electric power meter host is characterized by comprising the following components of the electric power meter host, the rotating speed encoder, the torque flange, the adaptive coupler, the transition support, the mounting base, the tested starter, the upper computer, the closed-loop control lower computer and the four-quadrant operation frequency converter.
Detailed Description
Specific examples are given below to further clarify, complete and detailed description of the technical scheme of the invention. The present embodiment is a preferred embodiment based on the technical solution of the present invention, but the scope of the present invention is not limited to the following embodiments.
As shown in fig. 1 and 2, a control method of a starter load control system based on an electric dynamometer comprises a tested starter 7, an electric dynamometer host 1, a rotating speed encoder 2, a torque flange 3, an adaptive coupler 4, an upper computer 8, a closed-loop control lower computer 9 and a four-quadrant operation frequency converter 10; the tested starter 7 shafting is connected with one end of the adaptive coupler 4, the other end of the adaptive coupler 4 is horizontally connected with the torque flange 3, the torque flange 3 is horizontally connected with the electric dynamometer host 1, the electric dynamometer host 1 is connected with the rotating speed encoder 2, and the tested starter 7, the adaptive coupler 4, the torque flange 3 and the electric dynamometer host 1 are all arranged on the mounting base 6;
The torque flange 3 is connected with an upper computer 8, the electric dynamometer host 1 is respectively connected with a closed-loop control lower computer 9 and a four-quadrant operation frequency converter 10, the closed-loop control lower computer 9 is respectively and electrically connected with a rotating speed encoder 2 and the four-quadrant operation frequency converter 10, and the upper computer 8 is electrically connected with the closed-loop control lower computer 9;
The control method comprises the following steps:
S1: on the man-machine interface of the upper computer 8, the system is controlled to start and stop, the real-time values of the rotating speed and the torque parameters are displayed, the real-time values of the rotating speed and the torque parameters are recorded and stored, the rotating speed target value of the lower computer 9 is given to be controlled in a closed loop mode, the alarming values of the rotating speed and the torque parameters are set according to the performance requirements of the tested starter 7, and the system can be actively controlled to stop when the real-time values of the rotating speed and the torque parameters reach the alarming values; thereby playing a role in protection;
S2: the upper computer 8 gives a signal for starting the electric power dynamometer host 1 by the lower computer 9 under closed-loop control in a communication mode, the lower computer 9 under closed-loop control controls the four-quadrant running frequency converter 10 to drive the electric power dynamometer host 1 to start, and after the electric power dynamometer host 1 starts, the target rotating speed is set to be 0rpm, so that the system is in a standby state;
s3: under the condition that the system is in a standby state, starting a tested starter 7, setting a target rotating speed by an upper computer 8, and setting a target rotating speed of a lower computer 9 by the upper computer 8 in a closed loop control mode through communication;
S4: after the tested starter 7 is started, the rotating speed of the tested starter 7 is transmitted to the end of the rotating speed encoder 2 in a speed ratio of 1:1, and the rotating speed measured by the rotating speed encoder 2 is the rotating speed of the tested starter 7; the lower computer 9 is controlled in a closed loop to collect the rotating speed measured by the rotating speed encoder 2, and the four-quadrant operation frequency converter 10 is controlled to drive the electric dynamometer host 1 to reach the target rotating speed through closed loop operation.
Further, as shown in fig. 2, the four-quadrant operation frequency converter 10 provides driving for the electric dynamometer host 1, and the electric dynamometer host 1 simulates a main engine to provide load for the tested starter 7.
Further, the upper computer 8 is provided with a human-computer interface, and the upper computer 8 is connected with the tested starter 7.
Further, the torque flange 3 measures the torque output by the tested starter 7 and transmits the torque to the upper computer 8. The operator can control the tested starter 7 to reach the target rotation speed required by the test through the upper computer 8, and record data at the time required by the test and store the data in the upper computer 8.
Furthermore, shafting connection is adopted among the tested starter 7, the adaptive coupler 4, the torque flange 3, the rotating speed encoder 2 and the electric dynamometer host 1.
Further, a transition support 5 is arranged between the tested starter 7 and the adaptive coupler 4. In the present invention, the use of the transition support 5 or the absence of the transition support 5 may be selected according to the implementation of the specific embodiment.
Further, in the present invention, the actual main engine is in a state of constant inertia as the load of the starter 7 to be tested. In order to simulate this state, the time axis curve of the required rotation speed for the starting process is shown in fig. 3, the solid curve parallel to the time axis is the final target rotation speed of the tested starter 7, and the inclined solid curve is the transition process from 0rpm to the final target rotation speed. The transition process is equivalent to subdividing the rotating speed on the inclined line into a plurality of target rotating speed points, and the upper computer 8 sequentially gives the target rotating speed on the inclined line of the lower computer 9 under closed loop control in the transition time;
The solid curve cannot fluctuate beyond the range of the dashed line throughout the test. When the electric vortex power measuring machine is used for testing, the electric vortex power measuring machine can only be passively loaded, and when the rotating speed of the tested starter 7 has a trend exceeding the upper dotted curve in the rotating speed rising process, the electric vortex power measuring machine can control the electric vortex power measuring machine within the range of the dotted curve. However, if the rotation speed has a trend lower than the lower Fang Xuxian curve, the electric vortex power meter cannot actively drag, the actual rotation speed may be lower than the lower Fang Xuxian curve, the test effect is poor, or the test fails. Because the system of the invention uses the four-quadrant operation frequency converter 10 to drive the electric dynamometer host 1, the system can actively drag when the rotating speed has a trend lower than the lower Fang Xuxian curve, and the rotating speed is accurately controlled in the range of the dotted curve, so that the test is successfully completed.
Further, the torque flange 3 measures the torque output by the tested starter 7 and transmits the torque to the upper computer 8. The operator can control the tested starter 7 to reach the target rotating speed required by the test through the upper computer 8, and record data at the time required by the test and store the data in the upper computer 8;
After a test is completed, an operator is required to control the stopping of the electric dynamometer host 1 through a human-computer interface of the upper computer 8, and then the power source of the tested starter 7 is cut off; in the test process, when the electric dynamometer host 1 is loaded, the mechanical energy of the tested starter 7 is converted into electric energy and is transmitted to the four-quadrant operation frequency converter 10; the four-quadrant operation frequency converter 10 converts the electric energy into alternating current with synchronous phase and same amplitude with the power grid, and the alternating current is fed back to the power grid, so that electric equipment on the power supply grid is used, energy consumption equipment is not required to be increased, and the energy is consumed specially. When feeding, the frequency converter is provided with an active rectifying inverter ALM, so that the feeding synchronization performance is good, and the harmonic requirement meets the national power grid requirement.
In summary, in the control method of the starter load control system based on the electric dynamometer, in the starting process of various internal combustion engines and aeroengines, the matched starter is started first, the engine corresponds to the load of the starter, and the starter outputs a rotating speed to drive the engine to start. After the engine is started, the starter stops working. According to the technical scheme of the invention, the resistance of the main engine to the starter can be simulated according to the working state of the starter and the main engine when the starter and the main engine are used in combination, the rotating speed is accurately controlled in the starting process, parameters such as torque, rotating speed and the like are measured and recorded, the performance of the starter is tested, and the defects of control defects, environmental protection defects and the like in the prior art are overcome.
According to the invention, the four-quadrant operation frequency converter is adopted to drive the electric dynamometer host to control the rotating speed, so that the electric dynamometer host has the function which the electric vortex dynamometer does not have, can actively drag and passively load, and can better control the rotating speed in a required rotating speed interval, so that the control effect is better, and the electric vortex dynamometer host is stable and reliable; the system is simple to install, a cooling water path is not required to be designed, and a cooling water tower is not required to be built; the cost of circulating cooling water and the cost of waterway maintenance are saved during working. Once input, once and for all; when the braking is loaded, the mechanical energy is converted into electric energy, the electric energy is fed back to the power grid, the feeding quality is high, the energy is recycled, and the electric energy is saved for users; and heat production and consumption are not needed, and the harm of greenhouse effect is reduced.
The foregoing has outlined and described the features, principles, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the above-described embodiments, and that the above-described embodiments and descriptions are merely illustrative of the principles of the present invention, and that various changes and modifications may be made in the invention without departing from the spirit and scope of the invention, which is defined by the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (6)
1. The control method of a starter load control system based on an electric dynamometer, the system comprises a tested starter (7), and is characterized in that: the power station also comprises an electric power dynamometer host machine (1), a rotating speed encoder (2), a torque flange (3), an adaptive coupler (4), an upper computer (8), a closed-loop control lower computer (9) and a four-quadrant operation frequency converter (10); the tested starter (7) shafting is connected with one end of the adaptive coupler (4), the other end of the adaptive coupler (4) is horizontally connected with the torque flange (3), the torque flange (3) is horizontally connected with the electric power dynamometer host machine (1), the electric power dynamometer host machine (1) is connected with the rotating speed encoder (2), and the tested starter (7), the adaptive coupler (4), the torque flange (3) and the electric power dynamometer host machine (1) are all arranged on the mounting base (6);
the torque flange (3) is connected with an upper computer (8), the electric dynamometer host (1) is respectively connected with a closed-loop control lower computer (9) and a four-quadrant operation frequency converter (10), the closed-loop control lower computer (9) is respectively electrically connected with a rotating speed encoder (2) and the four-quadrant operation frequency converter (10), and the upper computer (8) is electrically connected with the closed-loop control lower computer (9);
The control method comprises the following steps:
S1: on a human-computer interface of an upper computer (8), controlling the starting and stopping of the system, displaying real-time values of the rotating speed and the torque parameters, recording and storing the real-time values of the rotating speed and the torque parameters, giving a rotating speed target value of a lower computer (9) for closed loop control, setting a rotating speed and torque parameter alarm value according to the performance requirement of a tested starter (7), and actively controlling the system to stop when the real-time values of the rotating speed and the torque parameters reach the alarm value;
s2: the upper computer (8) gives a signal for starting the electric power dynamometer host (1) by a closed-loop control lower computer (9) in a communication mode, the closed-loop control lower computer (9) controls the four-quadrant running frequency converter (10) to drive the electric power dynamometer host (1) to start, and after the electric power dynamometer host (1) is started, the target rotating speed is given to be 0rpm, so that the system is in a standby state;
s3: under the condition that the system is in a standby state, starting a tested starter (7), setting a target rotating speed by an upper computer (8), and setting a target rotating speed of a lower computer (9) by the upper computer (8) through a communication mode;
S4: after the tested starter (7) is started, the rotating speed of the tested starter (7) is transmitted to the end of a rotating speed encoder (2) at a speed ratio of 1:1, and the rotating speed measured by the rotating speed encoder (2) is the rotating speed of the tested starter (7); the lower computer (9) is controlled in a closed loop to collect the rotating speed measured by the rotating speed encoder (2), and the four-quadrant operation frequency converter (10) is controlled to drive the electric dynamometer host (1) to reach the target rotating speed through closed loop operation.
2. The control method of a starter load control system based on an electric dynamometer according to claim 1, characterized by: a transition support (5) is arranged between the tested starter (7) and the adaptive coupler (4).
3. The control method of a starter load control system based on an electric dynamometer according to claim 1, characterized by: the four-quadrant operation frequency converter (10) provides driving for the electric dynamometer host machine (1), and the electric dynamometer host machine (1) simulates a main engine to provide load for a tested starter (7).
4. The control method of a starter load control system based on an electric dynamometer according to claim 1, characterized by: the upper computer (8) is provided with a human-computer interface, and the upper computer (8) is connected with the tested starter (7).
5. The control method of a starter load control system based on an electric dynamometer according to claim 1, characterized by: the torque flange (3) measures the torque output by the tested starter (7) and transmits the torque to the upper computer (8).
6. The control method of a starter load control system based on an electric dynamometer according to claim 1, characterized by: the tested starter (7), the adaptive coupler (4), the torque flange (3), the rotating speed encoder (2) and the electric dynamometer host (1) are all connected by adopting a shafting.
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| CN201911391976.5A CN111076938B (en) | 2019-12-30 | 2019-12-30 | Control method of starter load control system based on electric dynamometer |
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| CN111766515B (en) * | 2020-07-08 | 2022-11-04 | 贵州航天林泉电机有限公司 | System and method for testing high-temperature high-speed starter generator system |
| CN113670623A (en) * | 2021-08-25 | 2021-11-19 | 陕西空天动力研究院有限公司 | Test bench for starting generator of micro turbojet engine |
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