CN114087258A - Hydraulic motor low-speed loading test device and method based on energy recycling - Google Patents
Hydraulic motor low-speed loading test device and method based on energy recycling Download PDFInfo
- Publication number
- CN114087258A CN114087258A CN202111367675.6A CN202111367675A CN114087258A CN 114087258 A CN114087258 A CN 114087258A CN 202111367675 A CN202111367675 A CN 202111367675A CN 114087258 A CN114087258 A CN 114087258A
- Authority
- CN
- China
- Prior art keywords
- motor
- permanent magnet
- hydraulic motor
- magnet synchronous
- hydraulic
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B19/00—Testing; Calibrating; Fault detection or monitoring; Simulation or modelling of fluid-pressure systems or apparatus not otherwise provided for
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Ac Motors In General (AREA)
Abstract
The invention discloses a hydraulic motor low-speed loading test device and method based on energy recycling, which comprises a soft starter (1), a driving motor (2), a hydraulic pump (3) and a proportional flow valve (4) which are sequentially connected, wherein the proportional flow valve (4) is connected with a hydraulic motor (5) to be tested; the device is characterized by further comprising a rotating speed torquemeter (6) and a permanent magnet synchronous motor (7), wherein the rotating speed torquemeter (6) is connected with the hydraulic motor (5) to be tested, the permanent magnet synchronous motor (7) is connected with a four-quadrant frequency converter (9), and the four-quadrant frequency converter (9) is connected with a power grid. The invention has the characteristic of effectively and stably loading the hydraulic motor to be tested.
Description
Technical Field
The invention relates to a low-speed loading test device for a hydraulic motor, in particular to a low-speed loading test device and method for the hydraulic motor based on energy recycling.
Background
As is known, in the development process of a hydraulic motor, a verification test of the hydraulic motor is required, and in the conventional method, a motor is used to drive a hydraulic pump, the hydraulic pump drives a hydraulic motor to be detected, the hydraulic motor drives a load, and then various loading tests are performed on the hydraulic motor. At present, the load loaded on the tested hydraulic motor is usually an oil pump, and the loading of the hydraulic motor is realized by proportionally loading the oil pump. The method can meet the type test and the performance test of the hydraulic motor in conventional tests. However, during research, development and verification tests, the motor needs to be stably loaded at a low speed, and the hydraulic motor cannot be effectively loaded due to poor stability of the hydraulic pump at the low speed, so that normal tests can be influenced. Therefore, the prior art has the problem that the hydraulic motor to be tested cannot be loaded effectively and stably.
Disclosure of Invention
The invention aims to provide a hydraulic motor low-speed loading test device and method based on energy recycling. The invention has the characteristic of effectively and stably loading the hydraulic motor to be tested.
The technical scheme of the invention is as follows: the hydraulic motor low-speed loading test device based on energy recycling comprises a soft starter, a driving motor, a hydraulic pump and a proportional flow valve which are sequentially connected, wherein the proportional flow valve is connected with a hydraulic motor to be tested; the device also comprises a rotating speed and torque meter and a permanent magnet synchronous motor which are connected with the hydraulic motor to be tested, wherein the permanent magnet synchronous motor is connected with a four-quadrant frequency converter, and the four-quadrant frequency converter is connected with a power grid.
In the hydraulic motor low-speed loading test device based on energy recycling, a high-frequency reactor is arranged between the permanent magnet synchronous motor and the four-quadrant frequency converter.
In the hydraulic motor low-speed loading test device based on energy recycling, the permanent magnet synchronous motor is further provided with a sin/cos encoder.
The hydraulic motor low-speed loading test method based on energy recovery and utilization comprises the steps that a driving motor is used for driving a hydraulic pump to provide a hydraulic source, hydraulic oil is used for regulating the flow entering a hydraulic motor to be tested through a proportional flow valve, the hydraulic motor is connected with a permanent magnet synchronous motor through a rotating speed torquer, and electric energy generated by the permanent magnet synchronous motor in a motor mode is fed back to a power grid through a four-quadrant frequency converter; the magnetic pole position of the permanent magnet synchronous motor is sensed through the four-quadrant frequency converter, and then the low-speed stability of the driving motor is controlled.
In the hydraulic motor low-speed loading test method based on energy recycling, the four-quadrant frequency conversion adopts a speed control torque amplitude limiting mode to respectively control the rotating speed and the torque of the permanent magnet synchronous motor.
In the hydraulic motor low-speed loading test method based on energy recycling, the torque of the driving motor is slowly adjusted by giving the rotating speed of the permanent magnet synchronous motor, the torque of the driving motor is controlled to be larger than that of the hydraulic motor to be tested, and the stable loading of the hydraulic motor to be tested at the speed lower than 5rpm is realized.
In the hydraulic motor low-speed loading test method based on energy recycling, the rotating speed of the permanent magnet synchronous motor is 5 rpm.
Compared with the prior art, the hydraulic pump driven by the driving motor and the tested hydraulic motor driven by the hydraulic pump are adopted in the invention; the permanent magnet synchronous motor driven by the tested hydraulic motor is connected with the four-quadrant frequency converter, the four-quadrant frequency converter can feed back electric energy generated by the permanent magnet synchronous motor driven by the tested hydraulic motor to a power grid, the electric energy can be recycled while motor loading is achieved, and test cost is saved. The load driven by the tested hydraulic pump is changed into a permanent magnet synchronous motor, the permanent magnet synchronous motor works in a generator mode at the moment, and because the permanent magnet synchronous motor does not need an excitation winding, a rotor and a stator magnetic field run synchronously during running, the power factor is close to 1, the low-speed stability is good, the loading torque is stable, meanwhile, the rotational inertia of the permanent magnet synchronous motor is small, the high-speed permanent magnet synchronous motor is adopted for direct loading, and the stable loading of the motor rotating speed from 0-15000RPM can be realized without a speed increasing box; the experimental device is simplified, the power consumption of the tested hydraulic pump is prevented from being changed into heat energy, and the experimental cost is saved. In conclusion, the hydraulic loading device has the characteristic of being capable of effectively and stably loading the hydraulic motor to be tested.
Drawings
Fig. 1 is a schematic structural view of the present invention.
The labels in the figures are: the method comprises the following steps of 1-a soft starter, 2-a driving motor, 3-a hydraulic pump, 4-a proportional flow valve, 5-a hydraulic motor to be tested, 6-a rotating speed torquemeter, 7-a permanent magnet synchronous motor, 8-a high-frequency reactor, 9-a four-quadrant frequency converter and 10-a sin/cos encoder.
Detailed Description
The invention is further illustrated by the following figures and examples, which are not to be construed as limiting the invention.
Examples are given. The hydraulic motor low-speed loading test device based on energy recovery and utilization is formed as shown in figure 1 and comprises a soft starter 1, a driving motor 2, a hydraulic pump 3 and a proportional flow valve 4 which are sequentially connected, wherein the proportional flow valve 4 is connected with a hydraulic motor 5 to be tested; the device is characterized by further comprising a rotating speed and torque meter 6 and a permanent magnet synchronous motor 7, wherein the rotating speed and torque meter 6 is connected with the hydraulic motor 5 to be tested, the permanent magnet synchronous motor 7 is connected with a four-quadrant frequency converter 9, and the four-quadrant frequency converter 9 is connected with a power grid.
And a high-frequency reactor 8 is arranged between the permanent magnet synchronous motor 7 and the four-quadrant frequency converter 9.
And a sin/cos encoder 10 is also arranged on the permanent magnet synchronous motor 7.
The hydraulic motor low-speed loading test method based on energy recycling utilizes a driving motor to drive a hydraulic pump to provide a hydraulic source, hydraulic oil is used for adjusting the flow entering a hydraulic motor to be tested through a proportional flow valve, the hydraulic motor is connected with a permanent magnet synchronous motor through a rotating speed torquer, and electric energy generated by the permanent magnet synchronous motor in a motor mode is fed back to a power grid through a four-quadrant frequency converter; the magnetic pole position of the permanent magnet synchronous motor is sensed through the four-quadrant frequency converter, and then the low-speed stability of the driving motor is controlled.
The four-quadrant frequency conversion adopts a speed control torque amplitude limiting mode to respectively control the rotating speed and the torque of the permanent magnet synchronous motor.
The torque of the driving motor is slowly adjusted by giving the rotating speed of the permanent magnet synchronous motor, the driving motor is controlled to be larger than the torque of the hydraulic motor to be detected, and stable loading of the hydraulic motor to be detected below 5rpm is achieved.
The rotation speed of the permanent magnet synchronous motor is 5 rpm.
After the soft starter 1 starts the driving motor 2, the driving motor 2 drives the hydraulic pump 3 to provide a hydraulic source for the system, hydraulic oil enters the hydraulic motor 5 through the proportional flow valve 4 to be regulated in flow, the hydraulic motor 5 is connected with the permanent magnet synchronous motor 7 through the rotating speed torquer 6, and the permanent magnet synchronous motor 7 works in a motor mode to generate electric energy to be fed back to a power grid through the four-quadrant frequency converter 9.
Because the permanent magnet synchronous motor can generate reverse electromotive force when running at high speed, a high-frequency reactor 8 is additionally arranged between the permanent magnet synchronous motor 7 and the four-quadrant frequency converter 9.
The sin/cos encoder 10 is installed on the permanent magnet synchronous motor 7, so that the running precision of the motor is improved, and meanwhile, the four-quadrant frequency converter 9 can sense the magnetic pole position of the permanent magnet synchronous motor 7 to control the low-speed stability of the motor.
The device adopts a speed control torque amplitude limiting mode, the control quantity of the frequency converter is speed and rotating speed, when a motor loading test is carried out, the given speed value is zero, and a given torque signal needs to be loaded, so that the method does not need to judge the rotating direction of the motor.
The device realizes low-speed loading and also realizes stable loading when the rotating speed of the motor is 5rpm, the lowest stable rotating speed of the hydraulic motor is about 150rpm due to the self characteristics of the hydraulic motor, the oscillation of the hydraulic motor is aggravated after the rotating speed is lower than 150rpm, and the motor speed is instantly changed into 0 by loading the hydraulic motor after violent oscillation occurs. In order to solve the problem, the low-speed stability of the permanent magnet synchronous motor is fully utilized, the rotating speed of the permanent magnet synchronous motor is set to be 5rpm, the rotating speed of the hydraulic motor is set to be 150rpm, the torque amplitude limit value of the frequency converter is slowly set, the rotating speed of the motor is stabilized by the motor when the amplitude limit value is larger than the torque of the hydraulic motor, the rotating speed of the motor is finally stabilized at 5rpm, and the torque of the motor is also stabilized at the moment, so that the low-speed stable loading of the motor is realized. The special low-speed stability of the permanent magnet synchronous motor, the encoder and the frequency converter is used as a stabilizer, so that the motor realizes ultra-low-speed loading. The device has been successfully applied to the low-speed stable loading test of a hydraulic motor of certain military products.
Claims (7)
1. Hydraulic motor low-speed loading test device based on energy recuperation utilizes, its characterized in that: the device comprises a soft starter (1), a driving motor (2), a hydraulic pump (3) and a proportional flow valve (4) which are sequentially connected, wherein the proportional flow valve (4) is connected with a hydraulic motor (5) to be tested; the device is characterized by further comprising a rotating speed torquemeter (6) and a permanent magnet synchronous motor (7), wherein the rotating speed torquemeter is connected with the hydraulic motor (5) to be tested, the permanent magnet synchronous motor (7) is connected with a four-quadrant frequency converter (9), and the four-quadrant frequency converter (9) is connected with a power grid.
2. The hydraulic motor low-speed loading test device based on energy recovery and utilization of claim 1, is characterized in that: and a high-frequency reactor (8) is arranged between the permanent magnet synchronous motor (7) and the four-quadrant frequency converter (9).
3. The hydraulic motor low-speed loading test device based on energy recovery and utilization of claim 1, is characterized in that: and a sin/cos encoder (10) is also arranged on the permanent magnet synchronous motor (7).
4. The method for applying the hydraulic motor low-speed loading test device based on energy recovery and utilization as claimed in any one of claims 1 to 3 is characterized in that: the driving motor is utilized to drive the hydraulic pump to provide a hydraulic source, hydraulic oil is used for adjusting the flow entering the hydraulic motor to be detected through the proportional flow valve, the hydraulic motor is connected with the permanent magnet synchronous motor through the rotating speed torquer, and electric energy generated by the permanent magnet synchronous motor in a motor mode is fed back to a power grid through the four-quadrant frequency converter; the magnetic pole position of the permanent magnet synchronous motor is sensed through the four-quadrant frequency converter, and then the low-speed stability of the driving motor is controlled.
5. The hydraulic motor low-speed loading test method based on energy recovery and utilization is characterized by comprising the following steps of: the four-quadrant frequency conversion adopts a speed control torque amplitude limiting mode to respectively control the rotating speed and the torque of the permanent magnet synchronous motor.
6. The hydraulic motor low-speed loading test method based on energy recovery and utilization of claim 4, characterized in that: the torque of the driving motor is slowly adjusted by giving the rotating speed of the permanent magnet synchronous motor, the driving motor is controlled to be larger than the torque of the hydraulic motor to be detected, and stable loading of the hydraulic motor to be detected below 5rpm is achieved.
7. The hydraulic motor low-speed loading test method based on energy recovery and utilization of claim 6, characterized in that: the rotation speed of the permanent magnet synchronous motor is 5 rpm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111367675.6A CN114087258A (en) | 2021-11-18 | 2021-11-18 | Hydraulic motor low-speed loading test device and method based on energy recycling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111367675.6A CN114087258A (en) | 2021-11-18 | 2021-11-18 | Hydraulic motor low-speed loading test device and method based on energy recycling |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114087258A true CN114087258A (en) | 2022-02-25 |
Family
ID=80301555
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111367675.6A Pending CN114087258A (en) | 2021-11-18 | 2021-11-18 | Hydraulic motor low-speed loading test device and method based on energy recycling |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114087258A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115111228A (en) * | 2022-07-20 | 2022-09-27 | 北京天玛智控科技股份有限公司 | Hydraulic pump loading test system |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1868288A1 (en) * | 2006-06-15 | 2007-12-19 | ABB Oy | Method and system in connection with permanent magnet synchronous machines |
| CN103016452A (en) * | 2012-12-14 | 2013-04-03 | 中航力源液压股份有限公司 | Method and device for recovering and using energy produced in hydraulic motor load test |
| CN103291688A (en) * | 2013-06-08 | 2013-09-11 | 浙江大学 | Hydraulic pump motor test bed with energy recovery device and using method thereof |
| CN207301281U (en) * | 2017-08-18 | 2018-05-01 | 山东欧瑞安电气有限公司 | A kind of high-power low-speed permanent-magnet synchronous motor is to holding in the palm test platform |
| CN213598283U (en) * | 2020-07-30 | 2021-07-02 | 九江七所精密机电科技有限公司 | Energy feedback type electric loading tester |
| CN216433528U (en) * | 2021-11-18 | 2022-05-03 | 力源液压系统（贵阳）有限公司 | Low-speed loading test device for hydraulic motor |
-
2021
- 2021-11-18 CN CN202111367675.6A patent/CN114087258A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1868288A1 (en) * | 2006-06-15 | 2007-12-19 | ABB Oy | Method and system in connection with permanent magnet synchronous machines |
| CN103016452A (en) * | 2012-12-14 | 2013-04-03 | 中航力源液压股份有限公司 | Method and device for recovering and using energy produced in hydraulic motor load test |
| CN103291688A (en) * | 2013-06-08 | 2013-09-11 | 浙江大学 | Hydraulic pump motor test bed with energy recovery device and using method thereof |
| CN207301281U (en) * | 2017-08-18 | 2018-05-01 | 山东欧瑞安电气有限公司 | A kind of high-power low-speed permanent-magnet synchronous motor is to holding in the palm test platform |
| CN213598283U (en) * | 2020-07-30 | 2021-07-02 | 九江七所精密机电科技有限公司 | Energy feedback type electric loading tester |
| CN216433528U (en) * | 2021-11-18 | 2022-05-03 | 力源液压系统（贵阳）有限公司 | Low-speed loading test device for hydraulic motor |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115111228A (en) * | 2022-07-20 | 2022-09-27 | 北京天玛智控科技股份有限公司 | Hydraulic pump loading test system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4309620A (en) | Flywheel electric transmission apparatus | |
| US20090224721A1 (en) | Varying flux versus torque for maximum efficiency | |
| CN102882455B (en) | Excitation control method and device used in starting process of aeronautical tertiary brushless AC synchronous motor | |
| CN102611369B (en) | Speed-regulating system for switched reluctance motor specially used for electric vehicle | |
| Rauth et al. | Comparative analysis of IM/BLDC/PMSM drives for electric vehicle traction applications using ANN-Based FOC | |
| CN103872971A (en) | Square wave combining excitation starter/ electric generator control method | |
| CN103715712A (en) | Method for permanent magnet direct drive wind power generation system to participate in power grid frequency regulation | |
| CN216433528U (en) | Low-speed loading test device for hydraulic motor | |
| CN104811112A (en) | Control method for double-feed permanent magnet synchronous motor of electric automobile | |
| JPH086583B2 (en) | Exhaust energy recovery method for internal combustion engine | |
| CN114087258A (en) | Hydraulic motor low-speed loading test device and method based on energy recycling | |
| CN101546947A (en) | Bearing-free switch reluctance motor and control method thereof | |
| CN103723027A (en) | Stepless speed regulating system for magnetic gear motor rotation | |
| CN105763125A (en) | Three-level synchronous starter/generator starting control method based on current/rotate speed timesharing loop closing | |
| CN202856679U (en) | Excitation control device in start process of aviation triple brushless alternating current synchronous motor | |
| CN110048571A (en) | A kind of three-phase permanent-magnetic synchronous motors and its starting method | |
| CN113285646B (en) | Driver brake control method without using external brake unit | |
| CN205945577U (en) | Frequency conversion energy -saving power generation unit | |
| CN112234886B (en) | Reverse excitation method of starting integrated machine | |
| Kozachenko et al. | Electric transmission based on the switched reluctance motor with independent excitation | |
| CN201041971Y (en) | Built-in permanent magnetic synchronous electromotor | |
| US9035481B1 (en) | Using AC and DC generators with controllers as a regenerative power burn off device | |
| CN202550951U (en) | Special SRM (switched reluctance motor) speed-regulating system for electric automobile | |
| CN206753824U (en) | A kind of generator | |
| CN201980094U (en) | Driving control system of electric vehicle based on stacked permanent magnet motors |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information |
Address after: 550018 No.1, 2nd Floor, Building 102, Beiya Village, Xintianzhai, Wudang District, Guiyang City, Guizhou Province Applicant after: Guizhou Anfei Precision Manufacturing Co.,Ltd. Address before: 550018 No. 1, floor 1, Building 102 and floor 2, building 113, Beiya Road, xintianzhai, Wudang District, Guiyang City, Guizhou Province Applicant before: LIYUAN HYDRAULIC SYSTEM (GUIYANG) Co.,Ltd. |
|
| CB02 | Change of applicant information |