CN202997521U - Motor drive controller having current-limiting protection function - Google Patents
Motor drive controller having current-limiting protection function Download PDFInfo
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- CN202997521U CN202997521U CN 201220617609 CN201220617609U CN202997521U CN 202997521 U CN202997521 U CN 202997521U CN 201220617609 CN201220617609 CN 201220617609 CN 201220617609 U CN201220617609 U CN 201220617609U CN 202997521 U CN202997521 U CN 202997521U
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Abstract
The utility model discloses a motor drive controller having a current-limiting protection function, and is characterized by comprising: a sampling unit used for acquiring a current of a sampling circuit system and transmitting an acquired current signal to an operation processing unit; a setting unit used for setting a limiting value of the current and transmitting a limiting value signal to the operation processing unit; the operation processing unit used for receiving the current signal acquired by the sampling unit and the limiting value signal set by the setting unit, then processing the signals to enable the signals to become a needed data format, and outputting the signals to a comparison unit; and the comparison unit used for receiving the acquired current signal and the current limiting value signal of the setting unit transmitted by the operation processing unit, and comparing the two signals, if the current value acquired by the sampling unit is greater than the current value set by the setting unit, a shutdown signal used for shutting down the sampling circuit system is outputted; if the current value acquired by the sampling unit is less than the current value set by the setting unit, the shutdown signal does not be outputted.
Description
Technical field
The utility model relates to the motor drive controller with current-limiting protection.
Background technology
Magneto that current research and development are made promote the use of process, when the drive operation of magneto is in some non-normal working conditions, more and more higher to the specification requirement of implementing corresponding safeguard measure.Current limit is intended to not change under the prerequisite of normal operation circuit characteristic, realizes the current limit that needs surpassing.The key property that desirable demand limiter should have: consumed power not when normally moving, only work when the needs Limited Current, and after fault condition was removed, system can also resume work; The circuit system structure of Limited Current is simple, reliable simultaneously, repeatedly continuous action; Cost is low.And the current limiting technique of practical application at present mainly contains digital control current limiting technique and simulation current limiting technique.
The principle of digital control current limiting technique: when having served as multi-load and being added on inverter; under the inverter fed control action; if not making current limliting and short-circuit protection processes; output voltage can keep constant; but output current increases; when electric current acquires a certain degree, switching tube will burn, and makes the inverter load cause excessive electric current.If reduce the amplitude of inverter output voltage, just might limit the power that is delivered to load, in order to implement the method, need to detect inductive current, after electric current being detected, need to carry out sinusoidal calculations, calculate the range value in this moment, then with preassigned given range in value compare, as in given range, do not do any processing; When electric current exceeds normal range (NR).Find corresponding multiplication factor by the factor table of searching previous formulation, to reduce the amplitude of output voltage.The electric current that detects is larger, and multiplication factor is less, like this, has just reduced output voltage, has limited output current.
The part yet digital control current limiting technique comes with some shortcomings:
1. need to carry out sinusoidal calculations, to microprocessor require highly, need to calculate in real time.So just need to introduce microprocessor, not only increased the cost of system, but also need to test accordingly, the construction cycle of system also can increase.
2. the factor table of electric current needs to obtain by experiment in test, and experiment number and cycle are long.In order to obtain factor table more accurately, need to test under different environment, building test condition is also a problem.Simultaneously the data of test also needed to carry out the processing of some algorithms, so inevitable meeting and the actual deviation that occurs affect the overall performance of system.
With real system in conjunction with problem, for the different demands in reality, if all by processing like this, will be complicated some simple questions, be unfavorable for using, also increased cost.
The utility model content
One of the purpose of this utility model is in order to overcome deficiency of the prior art, a kind of motor drive controller with current-limiting protection easy to use to be provided.
For realizing above purpose, the utility model is achieved through the following technical solutions:
Have the motor drive controller of current-limiting protection, it is characterized in that, comprising:
Sampling unit is used for gathering the electric current of sample circuit system, and the current signal that gathers is delivered to operation processing unit;
Setup unit is used for setting the limits value of electric current, and it is delivered to operation processing unit;
Operation processing unit, the limits value signal that be used for to receive adopts current signal that the unit gathers and setup unit to set, and process and make it to become the data format that needs and export comparing unit to;
Comparing unit for the current signal of the collection that receives the operation processing unit conveying and the current limit value signal of setup unit, and compares both; If output shutdown signal during the current value that the current value that sampling unit gathers is set greater than setup unit, described shutdown signal are used for closing the sample circuit system; If during the current value that the current value of sampling unit collection is set less than setup unit do not export shutdown signal.
Preferably, also comprise filter unit, described filter unit is used for receiving the current signal that adopts the unit conveying and eliminates the burr pulse, for operation processing unit provides suitable collection current value.
Preferably, described filter unit is the RC circuit.
Preferably, described setup unit adjustable current limits value.
Preferably, described setup unit comprises potentiometer, adjusts the limits value of electric current by described potentiometer.
Preferably, described sampling unit comprises constantan wire, and described constantan wire is in parallel more than two.
The motor drive controller with current-limiting protection in the utility model can reduce the complexity of practical operation, reduces costs, and the Redundancy Design that solves in engineering construction requires problem.In the utility model course of work, each pointwise and set point relatively can be recovered automatically in the situation that do not affect system works, carry out multi-pass operation, and cost performance are higher.
Description of drawings
Fig. 1 is general construction of the present utility model and external relation block diagram.
Fig. 2 is the current curve diagram of the actual current limliting in the course of work of the present utility model.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in detail:
As shown in Figure 1, have the motor drive controller of current-limiting protection, comprising:
Sampling unit is used for gathering the electric current of sample circuit system, and the current signal that gathers is delivered to filter unit.Sampling unit adopts the constantan wire more than two in parallel.
Filter unit, described filter unit are used for receiving the current signal that adopts the unit conveying and eliminate the burr pulse, for operation processing unit provides suitable collection current value.Filter unit is the RC circuit.
Setup unit is used for setting the limits value of electric current, and it is delivered to operation processing unit.Setup unit includes potentiometer, the size of the limits value of potentiometer adjustable current.
Operation processing unit, the limits value signal that be used for to receive adopts current signal that the unit gathers and setup unit to set, and process and make it to become the data format that needs and export comparing unit to;
Comparing unit for the current signal of the collection that receives the operation processing unit conveying and the current limit value signal of setup unit, and compares both; If output shutdown signal during the current value that the current value that sampling unit gathers is set greater than setup unit, described shutdown signal are used for closing the sample circuit system; If during the current value that the current value of sampling unit collection is set less than setup unit do not export shutdown signal.
In the utility model course of work, each pointwise and set point relatively, actual comparison curves can recover in the situation that do not affect system works as shown in Figure 2 so automatically, carry out multi-pass operation, and cost performance is higher.
The use hardware circuit is completed the signal that samples and given signal is compared processing, export corresponding actuating signal, this process is that pointwise is carried out, namely constantly compare, system slowly maintained in the current value range of setting, for the current value that surpasses also can automatic detection and adjustment the action of system, after over-current state disappears, need not artificially participate in just recovery operation automatically, and can automatically repeatedly move, simple and reliable.The utility model is that the pointwise current limliting drives the hardware circuit of resist technology realization and the unit of other circuit interface, and this unit can be introduced circuit easily, and the power of consumption is little, can not produce other components of system as directed and disturb.
Embodiment in the utility model only is used for the utility model is described, and does not consist of the restriction to the claim scope, and other substituting of being equal in fact that those skilled in that art can expect are all in the utility model protection range.
Claims (6)
1. have the motor drive controller of current-limiting protection, it is characterized in that, comprising:
Sampling unit is used for gathering the electric current of sample circuit system, and the current signal that gathers is delivered to operation processing unit;
Setup unit is used for setting the limits value of electric current, and it is delivered to operation processing unit;
Operation processing unit, the limits value signal that be used for to receive adopts current signal that the unit gathers and setup unit to set, and process and make it to become the data format that needs and export comparing unit to;
Comparing unit for the current signal of the collection that receives the operation processing unit conveying and the current limit value signal of setup unit, and compares both; If output shutdown signal during the current value that the current value that sampling unit gathers is set greater than setup unit, described shutdown signal are used for closing the sample circuit system; If during the current value that the current value of sampling unit collection is set less than setup unit do not export shutdown signal.
2. the motor drive controller with current-limiting protection according to claim 1; it is characterized in that; also comprise filter unit, described filter unit is used for receiving the current signal that adopts the unit conveying and eliminates the burr pulse, for operation processing unit provides suitable collection current value.
3. the motor drive controller with current-limiting protection according to claim 2, is characterized in that, described filter unit is the RC circuit.
4. the motor drive controller with current-limiting protection according to claim 1, is characterized in that, described setup unit adjustable current limits value.
5. the motor drive controller with current-limiting protection according to claim 4, is characterized in that, described setup unit comprises potentiometer, adjusts the limits value of electric current by described potentiometer.
6. the motor drive controller with current-limiting protection according to claim 1, is characterized in that, described sampling unit comprises constantan wire, and described constantan wire is in parallel more than two.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220617609 CN202997521U (en) | 2012-11-20 | 2012-11-20 | Motor drive controller having current-limiting protection function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220617609 CN202997521U (en) | 2012-11-20 | 2012-11-20 | Motor drive controller having current-limiting protection function |
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| Publication Number | Publication Date |
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| CN202997521U true CN202997521U (en) | 2013-06-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201220617609 Expired - Fee Related CN202997521U (en) | 2012-11-20 | 2012-11-20 | Motor drive controller having current-limiting protection function |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103001186A (en) * | 2012-11-20 | 2013-03-27 | 上海硅力电子科技有限公司 | Motor-driven controller with current-limiting protection |
| CN109946957A (en) * | 2019-03-29 | 2019-06-28 | 江苏核电有限公司 | A kind of loading and unloading weight protective device |
-
2012
- 2012-11-20 CN CN 201220617609 patent/CN202997521U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103001186A (en) * | 2012-11-20 | 2013-03-27 | 上海硅力电子科技有限公司 | Motor-driven controller with current-limiting protection |
| CN109946957A (en) * | 2019-03-29 | 2019-06-28 | 江苏核电有限公司 | A kind of loading and unloading weight protective device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130612 Termination date: 20171120 |