CN110554684A - High-precision feedback load - Google Patents
High-precision feedback load Download PDFInfo
- Publication number
- CN110554684A CN110554684A CN201910849364.XA CN201910849364A CN110554684A CN 110554684 A CN110554684 A CN 110554684A CN 201910849364 A CN201910849364 A CN 201910849364A CN 110554684 A CN110554684 A CN 110554684A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/34—Testing dynamo-electric machines
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B23/00—Testing or monitoring of control systems or parts thereof
- G05B23/02—Electric testing or monitoring
- G05B23/0205—Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults
- G05B23/0208—Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults characterized by the configuration of the monitoring system
- G05B23/0213—Modular or universal configuration of the monitoring system, e.g. monitoring system having modules that may be combined to build monitoring program; monitoring system that can be applied to legacy systems; adaptable monitoring system; using different communication protocols
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/20—Pc systems
- G05B2219/24—Pc safety
- G05B2219/24065—Real time diagnostics
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Control Of Electric Motors In General (AREA)
Abstract
The invention discloses a high-precision feedback load, which comprises a circuit driving module, a controllable rectifying module and an isolation transformation module which are arranged in sequence, wherein a product to be tested is arranged between the circuit driving module and the isolation transformation module; the size of the output current of the product to be tested is adjusted by adjusting the size of the controllable rectifying module, so that the product to be tested can operate under the working condition of rated power. The motor controller can simulate the running state of a motor as a load, so that the motor controller product can reach the state of rated output power in the production test process.
Description
Technical Field
The invention relates to the technical field of motor testing, in particular to a high-precision feedback load.
Background
The loading mode that current machine controller (converter, new forms of energy motor control etc.) adopted when the test has: the motor is in no-load, the motor carries a flywheel load, the motor is in a dragging rack, the motor simulator, the common feedback load and the reactor simulate the motor load. The loads can be divided into two categories, namely 'motor type loads' formed by a motor and other loads or in a non-loading mode; secondly, a professional motor simulator; thirdly, common feedback load; and fourthly, simulating the motor load by using the reactor.
Firstly, the actual working condition of the controller is simulated most truly in the process of testing and verifying the motor controller by the motor load. However, the motor load occupies a large space, which is inconvenient for testing the controller in mass production. At the same time, the efficiency of the motor is generally low and the energy consumption is high.
Secondly, professional motor simulators can simulate different types of motors. However, the motor simulator is expensive, and the investment cost for adopting the motor simulator in mass production is huge.
Third, the normal feedback load can realize the controller output rated power. But is poor in analog motor performance, causes distortion in the controller output waveform, and has a large harmonic content. Has an impact on the accuracy of the controller test.
Finally, the reactor load is small in occupied area and low in investment cost. But when the reactor is used as a load, the controller interacts with the reactor in a reactive power manner. The output current of the controller can only be pulled up to the rated current level, and the output voltage of the controller is very small. Rated power loading or overload loading cannot be achieved.
Disclosure of Invention
The invention aims to provide a high-precision feedback load, which can simulate the running state of a motor as a load, so that a motor controller product can reach the state of rated output power in the production test process.
In order to solve the technical problem, the invention provides a high-precision feedback load, which comprises a circuit driving module, a controllable rectifying module and an isolation transformation module which are sequentially arranged, wherein a product to be tested is arranged between the circuit driving module and the isolation transformation module; the size of the output current of the product to be tested is adjusted by adjusting the size of the controllable rectifying module, so that the product to be tested can operate under the working condition of rated power.
Preferably, the system further comprises a monitoring module, and the monitoring module is connected with the product to be tested to obtain an actual operation value of the product to be tested.
Preferably, the monitoring module is connected to the controllable rectifier module to monitor an operating state of the controllable rectifier module.
Preferably, the monitoring module is connected with the isolation transformation module to monitor the operation state of the isolation transformation module.
Preferably, the monitoring module comprises a signal collector and a memory, the signal collector can collect voltage and current output, and the memory stores signals obtained by the signal collector.
Preferably, the circuit driving module is a dc power supply.
Preferably, the isolation transformer module comprises an isolation transformer.
Preferably, the circuit testing device further comprises a filtering module, wherein the filtering module comprises a first filtering capacitor, a second filtering capacitor and a third filtering capacitor, the first filtering capacitor is located between the isolation transformation module and the product to be tested, the second filtering capacitor is located between the isolation transformation module and the controllable rectification module, and the third filtering capacitor is located between the controllable rectification module and the circuit driving module.
The invention has the beneficial effects that:
1. The invention can simulate the running state of the motor as a load, so that the motor controller products can reach the state of rated output power in the production test process.
2. When the system is used as a load to operate, the special feedback technology can save energy consumption and save production operation cost in the production test process.
3. The high-precision load characteristic of the invention enables the product output to be similar to a sine wave. The total harmonic quantity is low, so that the output voltage and current fluctuation of the product is small, and the aging test requirement and the high-requirement performance test requirement can be met.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
The reference numbers in the figures illustrate: 1. a circuit driving module; 2. a controllable rectification module; 3. an isolation transformation module; 4. a product to be tested; 5. a first filter capacitor; 6. a second filter capacitor; 7. and a third filter capacitor.
Detailed Description
The present invention is further described below in conjunction with the following figures and specific examples so that those skilled in the art may better understand the present invention and practice it, but the examples are not intended to limit the present invention.
Referring to fig. 1, the invention discloses a high-precision feedback load, which comprises a circuit driving module 1, a controllable rectifying module 2 and an isolation transformation module 3 which are arranged in sequence, wherein a product 4 to be tested is arranged between the circuit driving module 1 and the isolation transformation module 3. The size of the output current of the product to be tested is adjusted by adjusting the size of the controllable rectifying module 2, so that the product 4 to be tested can operate under the working condition of rated power.
The invention also comprises a monitoring module which is connected with the product to be tested 4 to obtain the actual operation value of the product to be tested 4. The monitoring module is connected with the controllable rectifier module 2 to monitor the operating state of the controllable rectifier module 2. The monitoring module is connected with the isolation transformation module 3 to monitor the operation state of the isolation transformation module 3.
The monitoring module comprises a signal collector and a memory, wherein the signal collector can collect voltage and current output, and the memory stores signals obtained by the signal collector. The circuit driving module 1 is a direct current power supply. The isolation transformer module 3 includes an isolation transformer.
The invention also comprises a filter module which comprises a first filter capacitor 5, a second filter capacitor 6 and a third filter capacitor 7, wherein the first filter capacitor 5 is positioned between the isolation transformation module 3 and the product 4 to be tested, the second filter capacitor 6 is positioned between the isolation transformation module 3 and the controllable rectification module 2, and the third filter capacitor is positioned between the controllable rectification module 2 and the circuit driving module 1
The high-precision feedback load has a compact structure, can be used for a wide-power-range controller, and greatly saves the floor area of production equipment. The price is low. The high-precision feedback load greatly reduces the distortion of the output waveform of the controller and the total harmonic quantity of the system through the optimization of the filtering structure. The detection precision of each technical parameter is improved when the controller is tested.
Compared with the prior art, the invention has the following advantages:
a. The running state of the motor is simulated to be used as a load, so that the motor controller products can reach the state of rated output power in the production test process.
b. When the system is used as a load to operate, a special feedback technology helps a client to save energy consumption and save production operation cost in the production test process.
c. The high-precision load characteristic enables the product output to approximate a sine wave. The total harmonic quantity is low, so that the fluctuation of the output voltage and the current of the product is small. Not only meets the requirement of aging test, but also meets the requirement of high-requirement performance test.
The above-mentioned embodiments are merely preferred embodiments for fully illustrating the present invention, and the scope of the present invention is not limited thereto. The equivalent substitution or change made by the technical personnel in the technical field on the basis of the invention is all within the protection scope of the invention. The protection scope of the invention is subject to the claims.
Claims (8)
1. A high-precision feedback load is characterized by comprising a circuit driving module, a controllable rectifying module and an isolation transformation module which are sequentially arranged, wherein a product to be tested is arranged between the circuit driving module and the isolation transformation module; the size of the output current of the product to be tested is adjusted by adjusting the size of the controllable rectifying module, so that the product to be tested can operate under the working condition of rated power.
2. the feedback load of claim 1, further comprising a monitoring module, wherein the monitoring module is connected to the product to be tested to obtain an actual operation value of the product to be tested.
3. The feedback load of claim 2, wherein the monitoring module is coupled to the controllable rectifier module to monitor an operating condition of the controllable rectifier module.
4. The feedback load of claim 2, wherein the monitoring module is coupled to the isolated transformer module to monitor an operating condition of the isolated transformer module.
5. the feedback load of claim 2, wherein the monitoring module comprises a signal collector and a memory, the signal collector is capable of collecting the voltage and current output, and the memory stores the signal obtained by the signal collector.
6. The feedback load of claim 1 wherein the circuit driver module is a dc power supply.
7. The feedback load of claim 1, wherein the isolation transformer module comprises an isolation transformer.
8. The feedback load of claim 1, further comprising a filter module, wherein the filter module comprises a first filter capacitor, a second filter capacitor, and a third filter capacitor, the first filter capacitor is disposed between the isolation transformer module and the product under test, the second filter capacitor is disposed between the isolation transformer module and the controllable rectifier module, and the third filter capacitor is disposed between the controllable rectifier module and the circuit driver module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910849364.XA CN110554684A (en) | 2019-09-09 | 2019-09-09 | High-precision feedback load |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910849364.XA CN110554684A (en) | 2019-09-09 | 2019-09-09 | High-precision feedback load |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110554684A true CN110554684A (en) | 2019-12-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910849364.XA Pending CN110554684A (en) | 2019-09-09 | 2019-09-09 | High-precision feedback load |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2884295A1 (en) * | 2013-12-13 | 2015-06-17 | MAN Truck & Bus AG | Systems and methods for the designing and testing of hybrid energy stores |
| CN107942176A (en) * | 2017-12-26 | 2018-04-20 | 深圳市英威腾电气股份有限公司 | A kind of test system of driver |
| CN108181526A (en) * | 2017-12-27 | 2018-06-19 | 上海辛格林纳新时达电机有限公司 | Test system for loading of frequency converter and inverter load test method |
| CN108241791A (en) * | 2018-03-02 | 2018-07-03 | 中国商用飞机有限责任公司北京民用飞机技术研究中心 | A kind of starter-generator simulator, starter-generator simulation system and method |
-
2019
- 2019-09-09 CN CN201910849364.XA patent/CN110554684A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2884295A1 (en) * | 2013-12-13 | 2015-06-17 | MAN Truck & Bus AG | Systems and methods for the designing and testing of hybrid energy stores |
| CN107942176A (en) * | 2017-12-26 | 2018-04-20 | 深圳市英威腾电气股份有限公司 | A kind of test system of driver |
| CN108181526A (en) * | 2017-12-27 | 2018-06-19 | 上海辛格林纳新时达电机有限公司 | Test system for loading of frequency converter and inverter load test method |
| CN108241791A (en) * | 2018-03-02 | 2018-07-03 | 中国商用飞机有限责任公司北京民用飞机技术研究中心 | A kind of starter-generator simulator, starter-generator simulation system and method |
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| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20191210 |