CN101615873A - Frequency relay - Google Patents
Frequency relay Download PDFInfo
- Publication number
- CN101615873A CN101615873A CN200910012713A CN200910012713A CN101615873A CN 101615873 A CN101615873 A CN 101615873A CN 200910012713 A CN200910012713 A CN 200910012713A CN 200910012713 A CN200910012713 A CN 200910012713A CN 101615873 A CN101615873 A CN 101615873A
- Authority
- CN
- China
- Prior art keywords
- frequency
- relay
- yzr
- unit
- motor rotor
- 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
Landscapes
- Control Of Ac Motors In General (AREA)
Abstract
The invention discloses a kind of frequency relay, it is characterized in that comprising: frequency measurement circuit, input unit, relay unit and control unit are set; Behind the frequency signal that receives the YZR motor rotor that frequency measurement circuit passes back, be translated into concrete frequency numerical value, its frequency setting value with the YZR motor rotor that makes the actuating of relay that the input unit input is set is compared, after the frequency of the YZR motor rotor that frequency measurement circuit is passed back reaches the said frequencies set point, send control signal to relay unit, make the actuating of relay in the relay unit.Switching device shifter provided by the invention is with respect to the phase asynchronous wound-rotor motor traditional control method of YZR type, and frequency relay has more accurate control than the time relay.In addition, it is simple in structure, be convenient to produce and with low cost being suitable for extensively promoted in motor rotor resistance switching field.
Description
Technical field
The present invention relates to a kind of YZR motor rotor resistance switching device shifter, relate in particular to a kind of frequency relay that adopts frequency relay control YZR motor rotor resistance to switch.
Background technology
In industrial equipments such as metallurgical machinery equipment, crane, often adopt the phase asynchronous wound-rotor motor of YZR type.The phase asynchronous wound-rotor motor of YZR type need seal in resistance at rotor loop in control, control its detent torque, reduces its starting current.And the phase asynchronous wound-rotor motor of YZR type is when needing full speed running, need to seal in resistance in the excision rotor loop, keep bigger starting torque in the whole starting process in order to make as far as possible, guarantee that simultaneously motor current does not exceed standard, generally need switch step by step when rotor resistance excises, what the phase asynchronous wound-rotor motor rotor resistance of tradition control YZR type classification was at present excised is to adopt the delay function of the time relay to realize.Because the delay time of the time relay is artificially rule of thumb to set, be illustrated in figure 1 as the principle schematic that traditional gear controlling resistance switches, when the time relay of S1 shelves reaches closing time, think that motor reaches S1 shelves control rate, gear S1 closure (being equivalent to the S1 short circuit is fallen), in the normal speed process, switch S1, S2, S3 and S4 gear in electrical motors successively like this, do not exceed standard to reach the qualification current of electric.This control often is accompanied by, and the time of setting is too short, and resistance excises too early, make the motor switch current surpass the maximum current of its permission, make electric motor overheating serious, motor moment can surpass starting torque, give the very big impact of mechanical mechanism, shorten the life-span of whole driving-chain.The time of setting is oversize, resistance is crossed late excision, can make the starting time long, is unfavorable for using and controlling of equipment, problems such as device efficiency have been reduced, rotor is cut the control design sketch of resistance time relay control mode as shown in Figure 3, and real electrical machinery is in Switch Rotor resistance, and switching moment of bearing and rush of current are extremely erraticly (to see ab, cd, ef, the gh section), most applications is much larger than the motor rated value.This is because the condition of switching is by time relay control, and in the reality, the adjusting of the time relay is (the seeing bc, de, fg section) that leans on empirical value fully, is not very accurate.In addition, because at different traffic directions, the effect difference of load, the adjustment of time is just more difficult, at descent direction, because load is a moment of accelerating, the motor deceleration degree is big, setting-up time is short, helps motor, but at ascent direction, because load is a resistance torque, the motor deceleration degree is little, and setting-up time is short to exist the situation identical with resistant load, even poorer.Otherwise setting-up time is long, may be suitable at ascent direction, because the time is long, will cause the runaway speed operation, at descent direction for equipment operation brings dangerous.
Summary of the invention
The present invention is directed to the proposition of above problem, a kind ofly cut on the resistance control mode basis in the motor tradition and develop, is to cut the control device of resistance condition with the rotor frequency.Concrete technological means is as follows:
A kind of frequency relay is characterized in that comprising:
Frequency measurement circuit, be used for will input the frequency signal of YZR motor rotor carry out Filtering Processing, harmonic component, DC component and interference signal are filtered, and the signal after the reduction is carried out carrying out after the processing and amplifying digital data transmission after mould/number conversion will be changed in control unit;
Input unit is set, is used for to control unit input setting signal, even the frequency setting value of the YZR motor rotor of the actuating of relay;
Relay unit is receiving opening of the closure of making war accordingly after the control signal or close point, rotor resistance is connected or cut away realizing;
Control unit, behind the frequency signal that receives the YZR motor rotor that frequency measurement circuit passes back, be translated into concrete frequency numerical value, its frequency setting value with the YZR motor rotor that makes the actuating of relay that the input unit input is set is compared, after the frequency of the YZR motor rotor that frequency measurement circuit is passed back reaches the said frequencies set point, send control signal to relay unit, make the actuating of relay in the relay unit.
Comprise more than one relay in the described relay unit, the corresponding setting input unit can be imported the more than one frequency setting value that makes the YZR motor rotor of the actuating of relay to control unit.
Described control unit is also by detecting the frequency of YZR motor rotor, judging the running status of motor, when at corresponding gear, detects frequency and differs far with the actual set value and report to the police by the display unit prompting, and control mains switch and carry out power-off protection.
Frequency relay provided by the invention is with respect to the phase asynchronous wound-rotor motor traditional control method of YZR type, frequency relay has more accurate control than the time relay, it is by detecting motor rotor frequency (speed), carry out control corresponding according to the frequency of setting, so no matter which kind of situation, the resistance switching point is fixedly switching point.Set suitable switching point, can accelerate the speed responsive time of motor, can not make motor bear overload and overcurrent again, improve the security of operation of motor greatly.Frequency relay also can be used for the protection to motoring, and motor can judge whether to be in state of a control by detecting the motor rotor frequency when certain state operation, can point out warning when out of control, carries out power-off protection.In addition, it is simple in structure, be convenient to produce and with low cost being suitable for extensively promoted in motor rotor resistance switching field.
Description of drawings
Fig. 1 is the principle schematic that traditional gear controlling resistance switches;
Fig. 2 is the structural representation of switching device shifter of the present invention;
Fig. 3 cuts the implementation procedure schematic diagram that resistance adopts time relay control mode for rotor;
Fig. 4 is the schematic diagram of the frequency setting value of single resistance embodiment for convert resistance of the present invention;
Fig. 5 is the structural representation of single resistance switching device shifter embodiment for convert resistance of the present invention;
Fig. 6 is the schematic diagram of the frequency setting value of four resistance embodiment for convert resistance of the present invention;
Fig. 7 is the structural representation of four resistance switching device shifter embodiment for convert resistance of the present invention;
Fig. 8 cuts the implementation procedure schematic diagram that resistance adopts time relay control mode for rotor.
Embodiment
Be illustrated in figure 2 as this frequency relay, comprise: be used for will input the frequency signal of YZR motor rotor carry out Filtering Processing, harmonic component, DC component and interference signal are filtered, and the signal after the reduction is carried out carrying out after the processing and amplifying the frequency measurement circuit of digital data transmission in the control unit after mould/number conversion will be changed; Be used for to control unit input setting signal, though the frequency setting value of the YZR motor rotor of the actuating of relay input unit is set; Be used for receiving opening of the closure of making war accordingly after the control signal or close point, with the relay unit of realizing rotor resistance is connected or cuts away; And behind the frequency signal that receives the YZR motor rotor that frequency measurement circuit passes back, be translated into concrete frequency numerical value, its frequency setting value with the YZR motor rotor that makes the actuating of relay that the input unit input is set is compared, after the frequency of the YZR motor rotor that frequency measurement circuit is passed back reaches the said frequencies set point, send control signal to relay unit, make the control unit of the actuating of relay in the relay unit.Wherein frequency measurement circuit is the integrated circuit of buffer circuit, filter and A/D converter; It is external input device that input unit is set, and can adopt display unit and the touch-screen that the input unit one is set to realize here; Relay unit can adopt more than one relay group, and the corresponding setting input unit also can be imported the more than one frequency setting value that makes the YZR motor rotor of the actuating of relay to control unit, with the switching of the different gears of control motor resistance; Control unit is a master control set, can be treatment facilities such as single-chip microcomputer and PLC, and following examples adopt single-chip microcomputer to realize.
Embodiment 1: as Fig. 4, shown in Figure 5, be single grade of control of motor, detection input with frequency measurement circuit when measuring is connected on the phase asynchronous wound-rotor motor rotor of the YZR type terminal, filter harmonic component in the input voltage signal by the filter in the frequency measurement circuit, DC component and interference signal, to restore tested supply frequency, after through transport and placing device and mould/number conversion processing, meet at single-chip microcomputer and handle computing, the frequency that calculates power supply is at last compared according to the switching frequency numerical value that the input unit input is set with single-chip microcomputer, when the frequency that records arrives set point, single-chip microcomputer can be controlled the corresponding relays action, the control of finishing gear switch (as shown in Figure 4, when frequency reached a point, controller was given relay control signal, and corresponding relay is finished the switching of resistance).
Embodiment 2: as Fig. 6, Fig. 7 and shown in Figure 8, identical on its mode of connection with being provided with of device with embodiment 1, different is, and what to adopt here is the switching controls of 4 gears, just relay unit needs 4 relays to finish the task switching of 4 gears, the frequency values of 4 suitable switching points of corresponding setting input unit input.As shown in Figure 6, here by being set, input unit imported a, b, c and 4 switching points of d to controller, using this device that the phase asynchronous wound-rotor motor of YZR type is finished the resistance switching is automated procedure, the situation of Switch Rotor resistance as shown in Figure 8, real electrical machinery is in Switch Rotor resistance as can be seen, and what switch moment and the electric current that bears and be rule extremely (sees ab, cd, ef, the gh section).By the parameter setting, the motor that can satisfy you has enough moment when rotor resistance switches, and the rotor electric current also is controlled at suitable scope simultaneously.
In addition, control unit is also by detecting the frequency of YZR motor rotor, judging the running status of motor, when at corresponding gear, detects frequency and differs far with the actual set value and report to the police by the display unit prompting, and control mains switch and carry out power-off protection.
The above; only be the preferable embodiment of the present invention; but protection scope of the present invention is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the present invention discloses; be equal to replacement or change according to technical scheme of the present invention and inventive concept thereof, all should be encompassed within protection scope of the present invention.
Claims (3)
1, a kind of frequency relay is characterized in that comprising:
Frequency measurement circuit, be used for will input the frequency signal of YZR motor rotor carry out Filtering Processing, harmonic component, DC component and interference signal are filtered, and the signal after the reduction is carried out carrying out after the processing and amplifying digital data transmission after mould/number conversion will be changed in control unit;
Input unit is set, is used for to control unit input setting signal, even the frequency setting value of the YZR motor rotor of the actuating of relay;
Relay unit is receiving opening of the closure of making war accordingly after the control signal or close point, rotor resistance is connected or cut away realizing;
Control unit, behind the frequency signal that receives the YZR motor rotor that frequency measurement circuit passes back, be translated into concrete frequency numerical value, its frequency setting value with the YZR motor rotor that makes the actuating of relay that the input unit input is set is compared, after the frequency of the YZR motor rotor that frequency measurement circuit is passed back reaches the said frequencies set point, send control signal to relay unit, make the actuating of relay in the relay unit.
2, a kind of frequency relay according to claim 1, it is characterized in that comprising in the described relay unit more than one relay, the corresponding setting input unit can be imported the more than one frequency setting value that makes the YZR motor rotor of the actuating of relay to control unit.
3, a kind of frequency relay according to claim 1; it is characterized in that described control unit is also by detecting the frequency of YZR motor rotor; to judge the running status of motor; when at corresponding gear; detection frequency and actual set value differ far and report to the police by the display unit prompting, and the control mains switch carries out power-off protection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910012713A CN101615873A (en) | 2009-07-24 | 2009-07-24 | Frequency relay |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910012713A CN101615873A (en) | 2009-07-24 | 2009-07-24 | Frequency relay |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101615873A true CN101615873A (en) | 2009-12-30 |
Family
ID=41495342
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910012713A Pending CN101615873A (en) | 2009-07-24 | 2009-07-24 | Frequency relay |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101615873A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105915120A (en) * | 2016-06-30 | 2016-08-31 | 苏州英威腾电力电子有限公司 | Buffer control circuit and buffer control method of motor device |
| CN106200544A (en) * | 2016-08-30 | 2016-12-07 | 大连国通电气有限公司 | A kind of protection system and method preventing PLC from crashing |
| CN107565874A (en) * | 2017-09-28 | 2018-01-09 | 包头钢铁（集团）有限责任公司 | A kind of control device for full digital contactless hoisting equipment and control method |
| CN113141128A (en) * | 2021-03-31 | 2021-07-20 | 首钢京唐钢铁联合有限责任公司 | Wound motor rotor series resistance starting fault detection method, device and system |
-
2009
- 2009-07-24 CN CN200910012713A patent/CN101615873A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105915120A (en) * | 2016-06-30 | 2016-08-31 | 苏州英威腾电力电子有限公司 | Buffer control circuit and buffer control method of motor device |
| CN106200544A (en) * | 2016-08-30 | 2016-12-07 | 大连国通电气有限公司 | A kind of protection system and method preventing PLC from crashing |
| CN106200544B (en) * | 2016-08-30 | 2019-03-29 | 大连国通电气有限公司 | A kind of protection system and method for preventing PLC controller from crashing |
| CN107565874A (en) * | 2017-09-28 | 2018-01-09 | 包头钢铁（集团）有限责任公司 | A kind of control device for full digital contactless hoisting equipment and control method |
| CN113141128A (en) * | 2021-03-31 | 2021-07-20 | 首钢京唐钢铁联合有限责任公司 | Wound motor rotor series resistance starting fault detection method, device and system |
| CN113141128B (en) * | 2021-03-31 | 2022-07-15 | 首钢京唐钢铁联合有限责任公司 | Wound motor rotor series resistance starting fault detection method, device and system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104898055B (en) | Motor status determination methods and device | |
| CN201587814U (en) | Tower crane speeder | |
| CN101997459A (en) | DC oil pump motor soft start control device | |
| CN106711953B (en) | Photovoltaic inverter direct-current side short-circuit protection device and protection method | |
| CN101615873A (en) | Frequency relay | |
| CN101505128B (en) | Shift control method for multi-stage motor | |
| CN102223126A (en) | Variable resistor Crowbar structures for low-voltage ride-through of wind power generation and method for realizing variable resistor Crowbar structures | |
| CN101645683B (en) | Variable frequency speed regulating system of high-frequency vibrating motor | |
| KR20140135662A (en) | Circuit breaker arrangement and power distribution unit | |
| CN203406808U (en) | Frequency conversion apparatus for taper motor of crane | |
| CN104868744A (en) | Dual-motor single variable-frequency drive in drive system and control method thereof | |
| DE102013009036A1 (en) | driving device | |
| CN202634357U (en) | Frequency relay | |
| CN112422021B (en) | Control method for preventing overload of variable frequency motor lifted by cantilever crane | |
| CN201975761U (en) | Intelligent control protecting switch | |
| CN108468643A (en) | It can determine the screw compressor capacity control system and method for the operation of frequency speed-changing | |
| CN103595332A (en) | Rotary filter screen control method based on frequency conversion technology | |
| CN102946087A (en) | Low voltage frequency converter provided with overvoltage protection function and overvoltage protection method of low voltage frequency converter | |
| CN202906444U (en) | Multi-speed motor control protector | |
| CN106532648A (en) | Differential protection device and method for two mutual backup variable frequency motors | |
| CN207410255U (en) | A kind of bi-motor eddy-current brake lifting mechanism automatic balance control system | |
| CN201976066U (en) | Frequency conversion control device of air compressor | |
| CN201243196Y (en) | Intelligent control protection switch | |
| CN201937519U (en) | Soft start control device of direct-current oil pump motor | |
| CN102931642A (en) | Low-voltage frequency converter with over-current protection function and over-current protection method for low-voltage frequency converter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Open date: 20091230 |