CN211425862U - Starter load control system based on electric dynamometer - Google Patents
Starter load control system based on electric dynamometer Download PDFInfo
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- CN211425862U CN211425862U CN201922430065.0U CN201922430065U CN211425862U CN 211425862 U CN211425862 U CN 211425862U CN 201922430065 U CN201922430065 U CN 201922430065U CN 211425862 U CN211425862 U CN 211425862U
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Abstract
A starter load control system based on an electric dynamometer comprises a tested starter, an electric dynamometer main machine, 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 the adaptive coupling, the other end of the adaptive coupling is horizontally connected with the torque flange, the torque flange is horizontally connected with the main machine of the electric dynamometer, and the main machine of the electric dynamometer is connected with a rotating speed encoder; the torque flange is connected with an upper computer, a main machine of the electric dynamometer 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 utility model discloses the resistance of starter is given to the simulation main engine, and accurate control rotational speed in the starting process measures record moment of torsion, rotational speed isoparametric, and test starter performance solves control defect, environmental protection defect.
Description
Technical Field
The utility model belongs to the technical field of the test, a technique such as various internal-combustion engines and aeroengine, starter is related to, concretely relates to starter load control system based on electric dynamometer machine.
Background
In the starting process of various internal combustion engines and aircraft engines, a starter matched with the internal combustion engines is started firstly, the engine is equivalent 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 eddy current dynamometer which is widely used for a test system of a starter load is generally adopted, the eddy current dynamometer cannot be actively dragged, and intervention cannot be adopted when the actual rotating speed is lower than the target rotating speed. The rack of electric dynamometer machine is then adopted in some, when handling the energy that the loading braking produced, adopts the braking chopper, turns into direct current with the energy, uses the resistance box heat production to consume, causes the energy waste, aggravates greenhouse effect.
SUMMERY OF THE UTILITY MODEL
In view of the above, in order to solve the above-mentioned deficiencies of the prior art, the present invention provides 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 used in combination, accurately controls the rotating speed in the starting process, measures and records the parameters of torque, rotating speed and the like, and tests the performance of the starter; the defects of control defect, environmental protection defect and the like in the prior art are overcome.
In order to achieve the above object, the utility model adopts the following technical scheme:
a starter load control system based on an electric dynamometer comprises a tested starter, and further comprises an electric dynamometer main machine, 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 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 main machine of the electric dynamometer, the main machine of the electric dynamometer is connected with the rotating speed encoder, and the tested starter, the adaptive coupler, the torque flange and the main machine of the electric dynamometer are all arranged on the mounting base;
the torque flange is connected with an upper computer, the main machine of the electric dynamometer 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;
furthermore, a transition support is arranged between the tested starter and the adaptive coupling.
Furthermore, the four-quadrant running frequency converter provides drive for the main engine of the electric dynamometer, and the main engine of the electric dynamometer simulates a main engine to provide load for the 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, the tested starter, the adaptive coupler, the torque flange, the rotating speed encoder and the main engine of the electric dynamometer are connected in a shafting mode.
The utility model has the advantages that:
in the starting process of various internal combustion engines and aircraft engines, a starter matched with the internal combustion engines is started firstly, the engine is equivalent 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. The technical scheme of the utility model can be according to the operating condition when starter and main engine jointly use, the resistance of starter is given to simulation main engine, at the accurate control rotational speed of starting in-process, measures recording torque, rotational speed isoparametric, tests the starter performance, solves drawbacks such as control defect, environmental protection defect among the prior art. The concrete points are as follows:
1. the four-quadrant running frequency converter is adopted to drive the main machine of the electric dynamometer to control the rotating speed, the electric dynamometer has the functions which are not possessed by an eddy current dynamometer, can be actively dragged and passively loaded, can better control the rotating speed within a required rotating speed interval, and has better control effect, stability and reliability;
2. the system of the utility model is simple to install, does not need to design a cooling water path and build a cooling tower; the cost of circulating cooling water and the cost of maintaining the water channel are saved during working. Once input, once for all;
3. when the utility model is loaded and braked, the mechanical energy is converted into electric energy to feed back to the power grid, the feed quality is high, the energy is recycled, and the electric energy is saved for users; heat generation consumption is not needed, and the harm of greenhouse effect is reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
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 line graph of the speed of the starter under test;
the labels in the figure are: 1. the device comprises an electric dynamometer main machine, 2, a rotating speed encoder, 3, a torque flange, 4, an adaptive coupler, 5, a transition support, 6, an installation base, 7, a tested starter, 8, an upper computer, 9, a closed-loop control lower computer, and 10, a four-quadrant operation frequency converter.
Detailed Description
The following provides specific embodiments, which will further clearly, completely and specifically explain the technical solutions of the present invention. The present embodiment is the best 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 starter load control system based on an electric dynamometer comprises a tested starter 7, and further comprises an electric dynamometer main 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 test starter 7 is connected with one end of the adaptive coupling 4 through a shaft system, the other end of the adaptive coupling 4 is horizontally connected with the torque flange 3, the torque flange 3 is horizontally connected with the electric dynamometer main machine 1, the electric dynamometer main machine 1 is connected with the rotating speed encoder 2, and the test starter 7, the adaptive coupling 4, the torque flange 3 and the electric dynamometer main machine 1 are all arranged on the installation base 6;
the torque flange 3 is connected with an upper computer 8, the electric dynamometer main machine 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;
further, as shown in fig. 2, the four-quadrant operation frequency converter 10 provides drive for the electric dynamometer main unit 1, and the electric dynamometer main unit 1 simulates a main engine to provide a 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 starter 7 to be tested and transmits the torque to the upper computer 8. An operator can control the tested starter 7 to reach the target rotating speed required by the test through the upper computer 8, and data are recorded in the time required by the test and stored in the upper computer 8.
Furthermore, the tested starter 7, the adaptive coupler 4, the torque flange 3, the rotating speed encoder 2 and the electric dynamometer main machine 1 are connected in a shafting mode.
Further, a transition support 5 is arranged between the tested starter 7 and the adaptive coupling 4. The utility model discloses in, can select to adopt transition support 5 or not adopt transition support 5 according to the implementation of specific embodiment.
The utility model discloses a work flow includes following step:
s1: on a human-computer 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 parameter are displayed, the real-time values of the rotating speed and the torque parameter are recorded and stored, the target rotating speed value of the lower computer 9 under closed-loop control is given, the alarming values of the rotating speed and the torque parameter are set according to the performance requirement 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 parameter reach the alarming values; thereby playing a role of protection;
s2: the upper computer 8 gives a signal for starting the electric dynamometer main engine 1 by a closed-loop control lower computer 9 in a communication mode, the closed-loop control lower computer 9 controls the four-quadrant operation frequency converter 10 to drive the electric dynamometer main engine 1 to start, after the electric dynamometer main engine 1 is started, the target rotating speed is given to be 0rpm, and the system is in a standby state;
s3: under the condition that the system is in a standby state, a tested starter 7 is started, meanwhile, the upper computer 8 gives a target rotating speed, and the upper computer 8 gives a target rotating speed of a closed-loop control lower computer 9 in 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 the rotating speed encoder 2 at the 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 closed-loop control lower computer 9 collects the rotating speed measured by the rotating speed encoder 2, controls the four-quadrant operation frequency converter 10 through closed-loop operation, and drives the electric dynamometer main machine 1 to reach the target rotating speed.
Further, the utility model discloses in, real main engine is as the load of the starter 7 of being tried, for the invariable state of inertia. In order to simulate this state, a time axis curve of the rotation speed required for the starting process is shown in fig. 3, a solid curve parallel to the time axis is the final target rotation speed of the starter 7 under test, and a diagonal solid curve is a transition process from 0rpm to the final target rotation speed. The transition process is equivalent to subdividing the rotating speed on the oblique line into a plurality of target rotating speed points, and the upper computer 8 sequentially gives the target rotating speed on the oblique line of the closed-loop control lower computer 9 within the transition time;
the solid curve does not fluctuate beyond the range of the dotted line throughout the test. When the eddy current dynamometer is used for testing, because the eddy current dynamometer can only be loaded passively, the eddy current dynamometer can control the tested starter 7 within the range of the curve of the dotted line when the rotating speed exceeds the curve trend of the dotted line above the rotating speed in the rotating speed rising process. However, if the rotating speed tends to be lower than the curve of the lower dotted line, the eddy current dynamometer cannot actively drag, the actual rotating speed may be lower than the curve of the lower dotted line, the test effect is poor, or the test fails. Because the utility model discloses an this system uses four-quadrant operation converter 10 drive electric dynamometer main engine 1, can be when the rotational speed has the curve trend that is less than the below dotted line, initiatively drags, with rotational speed accurate control at dotted line curve within range, successfully accomplish the experiment.
Further, the torque flange 3 measures the torque output by the starter 7 to be tested and transmits the torque to the upper computer 8. An operator can control the tested starter 7 to reach the target rotating speed required by the test through the upper computer 8, and data are recorded in the time required by the test and stored in the upper computer 8;
after a test is finished, an operator is required to control the stop of the electric dynamometer main machine 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 main machine 1 is loaded, the mechanical energy of the tested starter 7 is converted into electric energy and transmitted to the four-quadrant operation frequency converter 10; the four-quadrant operation frequency converter 10 converts the electric energy into alternating current with the same phase and amplitude as the power grid, and feeds the alternating current back to the power grid for use by electric equipment on the power supply network, and the energy is consumed specially without adding energy consumption equipment. When feeding, the frequency converter is provided with an active rectification inverter ALM, the feeding synchronization performance is good, and the harmonic wave requirement meets the national power grid requirement.
To sum up, the utility model discloses a starter load control system based on electric dynamometer machine, in the starting process of various internal-combustion engine and aeroengine, at first will start supporting starter with it, the load of starter is equivalent to the engine, and a rotational speed is exported to the starter, drives the engine and starts. After the engine is started, the starter stops working. The technical scheme of the utility model can be according to the operating condition when starter and main engine jointly use, the resistance of starter is given to simulation main engine, at the accurate control rotational speed of starting in-process, measures recording torque, rotational speed isoparametric, tests the starter performance, solves drawbacks such as control defect, environmental protection defect among the prior art.
The utility model adopts the four-quadrant operation frequency converter to drive the main machine of the electric dynamometer to control the rotating speed, has the function which is not possessed by the electric vortex dynamometer, can be actively dragged and passively loaded, better controls the rotating speed in the required rotating speed interval, has better control effect, and is stable and reliable; the system of the utility model is simple to install, does not need to design a cooling water path and build a cooling tower; the cost of circulating cooling water and the cost of maintaining the water channel are saved during working. Once input, once for all; when the utility model is loaded and braked, the mechanical energy is converted into electric energy to feed back to the power grid, the feed quality is high, the energy is recycled, and the electric energy is saved for users; heat generation consumption is not needed, and the harm of greenhouse effect is reduced.
The essential features, the basic principle and the advantages of the invention have been shown and described above. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only illustrative of the principles of the present invention, and that the present invention can be modified in various ways according to the actual situation without departing from the spirit and scope of the present invention, and these modifications and improvements are all within the scope of the present invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (6)
1. A starter load control system based on an electric dynamometer comprises a tested starter (7), and is characterized in that: the device is characterized by also comprising 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 device comprises a tested starter (7), a shaft system, a torque flange (3), an electric dynamometer main machine (1), a rotating speed encoder (2), a shaft system and a shaft coupling (4), wherein the shaft coupling is connected with one end of the adapter coupling (4), the other end of the adapter coupling (4) is horizontally connected with the torque flange (3), the torque flange (3) is horizontally connected with the electric dynamometer main machine (1), the electric dynamometer main machine (1) is connected with the rotating speed encoder (2), and the tested starter (7), the adapter;
the torque flange (3) is connected with an upper computer (8), the electric dynamometer main engine (1) is connected with a closed-loop control lower computer (9) and a four-quadrant operation frequency converter (10) respectively, the closed-loop control lower computer (9) is electrically connected with a rotating speed encoder (2) and the four-quadrant operation frequency converter (10) respectively, and the upper computer (8) is electrically connected with the closed-loop control lower computer (9).
2. The electric dynamometer-based starter load control system of claim 1, wherein: and a transition support (5) is arranged between the tested starter (7) and the adaptive coupling (4).
3. The electric dynamometer-based starter load control system of claim 1, wherein: the four-quadrant operation frequency converter (10) provides drive for the electric dynamometer main machine (1), and the electric dynamometer main machine (1) simulates a main engine to provide load for the tested starter (7).
4. The electric dynamometer-based starter load control system of claim 1, wherein: 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 electric dynamometer-based starter load control system of claim 1, wherein: and the torque flange (3) measures the torque output by the tested starter (7) and transmits the torque to the upper computer (8).
6. The electric dynamometer-based starter load control system of claim 1, wherein: the tested starter (7), the adaptive coupler (4), the torque flange (3), the rotating speed encoder (2) and the electric dynamometer main machine (1) are connected in a shafting mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201922430065.0U CN211425862U (en) | 2019-12-30 | 2019-12-30 | Starter load control system based on electric dynamometer |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201922430065.0U CN211425862U (en) | 2019-12-30 | 2019-12-30 | Starter load control system based on electric dynamometer |
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| CN211425862U true CN211425862U (en) | 2020-09-04 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111076938A (en) * | 2019-12-30 | 2020-04-28 | 凯迈(洛阳)机电有限公司 | Control method of starter load control system based on electric dynamometer |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111076938A (en) * | 2019-12-30 | 2020-04-28 | 凯迈(洛阳)机电有限公司 | Control method of starter load control system based on electric dynamometer |
| CN111076938B (en) * | 2019-12-30 | 2024-04-26 | 凯迈(洛阳)机电有限公司 | Control method of starter load control system based on electric dynamometer |
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