CN202309045U - Digital control protection device for electric grounding switch - Google Patents
Digital control protection device for electric grounding switch Download PDFInfo
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- CN202309045U CN202309045U CN2011203947700U CN201120394770U CN202309045U CN 202309045 U CN202309045 U CN 202309045U CN 2011203947700 U CN2011203947700 U CN 2011203947700U CN 201120394770 U CN201120394770 U CN 201120394770U CN 202309045 U CN202309045 U CN 202309045U
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Abstract
The utility model discloses a digital control protection device for an electric grounding switch, and relates to the field of protection for the electric grounding switches. The control protection device comprises a micro processor, an instruction receiving circuit, a motor driving circuit, a current detection circuit, a grounding switch position detection circuit and a motor direction conversion circuit, wherein the instruction receiving circuit, the micro processor and the motor driving circuit are connected with one another sequentially and connected with a motor through the output end of the motor driving circuit; the input end of the current detection circuit is connected with the output end of the motor driving circuit; the output end of the current detection circuit is connected with the micro processor; the grounding switch position detection circuit is used for detecting the current position of the grounding switch and sending position information to the micro processor; the input end of the motor direction conversion circuit is connected with the micro processor; and the output end of the motor direction conversion circuit is connected with the motor. The digital control protection device can protect the grounding switch and the motor of the grounding switch in a multi-level manner, and has the characteristic of effective and full protection.
Description
Technical field
The utility model relates to the electronic control and the protection field of the earthed switch in the cabinet, relates to the digital control protective device of a kind of electric ground switch in particular.
Background technology
Switch cubicle is the equipment that is used for connecting, breaking off and protect supply line, and is equipped with an earthed switch in the switch cubicle usually, and earthed switch guarantees personal safety when being the conduct maintenance, is used for a kind of mechanical grounding device of ground connection.When supply line or equipment break down or when normally overhauling, must earthed switch be closed a floodgate, this is in order to prevent that the staff from sending a telegram here suddenly when power failure equipments is worked, and plays the reliable and secure measure of guaranteeing staff's personal safety.Residual charge on the electric equipment that simultaneously switch cubicle broke off also can be closed ground connection and discharged by earthed switch.
Deciliter main employing manual operation of earthed switch in the conventional switch cabinet, promptly earthed switch is connected with a transmission output shaft, and the other end of this transmission output shaft can carry out artificial breaking-closing operating through operating grip; When needs operational grounding switch, the staff need go to switch cubicle and earthed switch carried out artificial divide-shut brake with installing.Transformer station realizes trend and requirement intelligent, sequencing control to switch cubicle in recent years, and switch cubicle has increased the function of electric ground switch; Electric ground switch has following main feature when carrying out the on/off switch operation at present:
One, earthed switch carries out in separating brake or the closing operation process, and load (resistance) changes, and it mainly shows: the fit quality quality is different when cooperating the earthed switch weight of different switch cubicle specifications and earthed switch different with specification to assemble with switch cubicle; Above-mentioned two kinds of situations all can have influence on earthed switch and divide fashionable resistance.
Two, in the electronic divide-shut brake process, require motor that stronger overload capacity is arranged, especially in the earthed switch making process in " dead point " interval, its load variations is big, speed is fast.
Three, the rotating of motor is to control realization through the position auxiliary switch of earthed switch.
Four, earthed switch is in electronic divide-shut brake process, if run into obstacle or jam, separating brake or closing position connect electric power polarity instead, can cause mechanism to damage or transmission failure, causes the control motor rotation blockage when serious, burns motor.
Five, owing to the rotating that needs a plurality of latching relays control electric motors, thereby be grounded the switch breaking-closing operating, so the control loop wiring is complicated, Control Node is more, thereby reduces system reliability, also safeguards to the user and brings inconvenience.
The user is in installation, use and inspection switch cabinet process; Since misoperation or inspection interlocking whether reset; At this moment implement the electric ground switch operation, can cause mutual interlocking gear distortion or transmission mechanism to lose efficacy and damage, then cause the control motor rotation blockage when serious; Burn motor, bring to the user to seriously influence and lose.
The utility model content
The purpose of the utility model is to provide a kind of electric ground switch digital control protective device, to solve the problem that has the security reliability difference in the prior art.
In order to reach above-mentioned purpose, the solution of the utility model is:
The digital control protective device of a kind of electric ground switch is used to control motor action; Wherein, Comprise microprocessor, command reception circuit, motor-drive circuit, current detection circuit, earthed switch position detecting circuit and motor drive direction change-over circuit; This command reception circuit, microprocessor link to each other with motor-drive circuit successively, and link to each other with motor through the output of this motor-drive circuit; The input of this current detection circuit links to each other with the output of motor-drive circuit, and the output of this current detection circuit links to each other with microprocessor; This earthed switch position detecting circuit is used to detect the current location of earthed switch and positional information is sent to microprocessor, and the input of this motor drive direction change-over circuit links to each other with microprocessor, and output then links to each other with motor.
Further, this motor-drive circuit adopts power field effect pipe, and the grid of this power field effect pipe links to each other with microprocessor, and drain electrode then links to each other with motor.
Further, this current detection circuit is a sampling resistor, and this sampling resistor is connected between the source electrode and the earth of this power field effect pipe.
Further, this motor drive direction change-over circuit comprises two single-pole double throw relays that all are connected between microprocessor and the motor.
Further, also be provided with motor gear between this microprocessor and the motor and select circuit, this motor gearbox then adopts the twin-stage gear.
After adopting said structure, the digital control protective device of a kind of electric ground switch that the utility model relates to, it receives instruction through the command reception circuit and by after the microprocessor analysis processing, through motor-drive circuit motor is driven again; This current detection circuit then is used for monitoring in real time the output current of motor, and gives microprocessor with feedback information; When finding to occur abnormal conditions such as clamping stagnation or stall when microprocessor, this motor output current can increase this moment this microprocessor can cut off the power supply of motor, and entire mechanism is protected; This earthed switch position detecting circuit detects the current location of earthed switch in real time simultaneously; Thereby can recognize whether this earthed switch is in the position that allows operation; Have only when it is in the position that can allow to operate and just carry out the operation of starter motor, and then play the effect of protection once more.
Description of drawings
The theory diagram of Fig. 1 digital control protective device preferred embodiment of a kind of electric ground switch for the utility model relates to;
The circuit theory diagrams of Fig. 2 digital control protective device of a kind of electric ground switch for the utility model relates to.
Among the figure:
Control protective device 100
Microprocessor 1 command reception circuit 2
Motor-drive circuit 3 current detection circuits 4
Earthed switch position detecting circuit 5 motor drive direction change-over circuits 6
Motor gear is selected circuit 7.
Embodiment
In order further to explain the technical scheme of the utility model, come the utility model is set forth in detail through specific embodiment below.
As shown in Figure 1, it is the digital control protective device 100 of a kind of electric ground switch for the utility model relates to, and it is used to control motor 200 and moves; This control protective device 100 comprises microprocessor 1, command reception circuit 2, motor-drive circuit 3, current detection circuit 4, earthed switch position detecting circuit 5 and motor drive direction change-over circuit 6; This command reception circuit 2, microprocessor 1 and motor-drive circuit 3 link to each other successively, and link to each other with motor 200 through the output of this motor-drive circuit 3; The input of this current detection circuit 4 links to each other with the output of motor-drive circuit 3, and the output of this current detection circuit 4 links to each other with microprocessor 1; This earthed switch position detecting circuit 5 is used to detect the current location of earthed switch and positional information is sent to microprocessor 1, and the input of this motor drive direction change-over circuit 6 links to each other with microprocessor 1, and output then links to each other with motor 200.
Like this, the utility model receives instruction through command reception circuit 2 and by after microprocessor 1 analyzing and processing, drives through 3 pairs of motors 200 of motor-drive circuit again; 4 output currents that are used for monitoring in real time motor 200 of this current detection circuit, and give microprocessor 1 with feedback information; When finding to occur abnormal conditions such as clamping stagnation or stall when microprocessor 1, these motor 200 output currents can increase this moment this microprocessor 1 can cut off the power supply of motor 200, and entire mechanism is protected; This earthed switch position detecting circuit 5 detects the current location of earthed switch in real time simultaneously; Thereby can recognize whether this earthed switch is in the position that allows operation; Have only when it is in the position that can allow to operate and just carry out the operation of starter motor 200, and then play the effect of protection once more.
As shown in Figure 2, this motor-drive circuit 3 adopts power field effect pipe Q10, and the grid of this power field effect pipe Q10 links to each other with microprocessor 1, and this microprocessor 1 is the U7 among the figure, and drain electrode then links to each other with motor M; Concrete; This microprocessor 1 is sent into said motor M to this power field effect pipe Q10 output pwm power control signal after power amplification, this current detection circuit 4 adopts sampling resistor R63; This sampling resistor R63 is connected between the source electrode and ground end of this power field effect pipe Q10; The output loop current feedback of real-time sampling is arrived microprocessor 1, and this current detection circuit 4 detects through the pwm signal to this microprocessor 1 output, monitors the operating current of motor 200 in real time; Be the power output of motor 200, can monitor accurately and control the ruuning situation of motor 200.
6 of this motor drive direction change-over circuits comprise two the single-pole double throw relay J 2, the J3 that all are connected between microprocessor 1 and the motor 200; Under the control of this microprocessor 1; Can play the access direction of conversion motor 200 and motor-drive circuit 3; According to the traffic direction control signal that said microprocessor 1 is sent into, output meets the driving voltage of polar requirement to motor M, realizes the conversion of motor 200 traffic directions as motor drive direction change-over circuit 6.5 of this earthed switch position detecting circuits are through a plurality of travel switches that are arranged on relevant position in the earthed switch or near switch, with detected earthed switch position signalling, after photoelectric coupler isolation, become and deliver to said microprocessor 1.
The course of work of the foregoing description is following: after initially powering on, this microcontroller gets into armed state to the software and hardware self check through the back, after receiving " combined floodgate " or " separating brake " order; Microcontroller is judged the earthed switch current location through earthed switch position detecting circuit 5 immediately; The eligible inner PWM module of this microcontroller that starts immediately; To output to motor-drive circuit 3 with minimum output power, and simultaneously the traffic direction signal sent to motor drive direction change-over circuit 6, the power signal that output is correct after conversion is to the control motor of earthed switch; Drive earthed switch to correct direction operation; This microcontroller carries out judgment processing to the current signal that current detection circuit 4 is sent in real time in the running, and the no abnormal power output that slowly increases again of running current realizes the soft start of motor up to rated value; The earthed switch real time position that this microcontroller is sent into ground connection position of the switch testing circuit 5 in the normal course of operation judges, closes out-put supply immediately when arriving the precalculated position and to motor braking.When system is smooth because of outside cause moves; The running current that feeds back to microcontroller through this current detection circuit 4 will be greater than inner setting value; Microcontroller is after internal judgment is confirmed to be the misoperation signal; Control this motor-drive circuit 3 with the PWM mode immediately and realize braking, motor and mechanism are protected.
Based on the stroke of electric ground switch and the relation between the loading moment; Difficult for fear of when carrying out the half way startup, occurring starting because of statical moment; Even the motor situation of stall locking once more, also being provided with motor gear between this microprocessor 1 and the motor 200 and selecting circuit 7, this moment, this motor gearbox should adopt the twin-stage gear; One grade is the Chang Suxiao moment of torsion, and other one grade is low speed high torque; When half way was restarted, 1 control of this microprocessor let motor 200 backward rotation, continues 100ms to 1000ms, and microprocessor 1 control motor gear is selected circuit 7 then, transferred the low speed torque gear to overcoming static torque, thereby overcame the problem that half way starts.
Product form of the foregoing description and graphic and non-limiting the utility model and style, the those of ordinary skill of any affiliated technical field all should be regarded as not breaking away from the patent category of the utility model to its suitable variation or modification of doing.
Claims (5)
1. the digital control protective device of electric ground switch is used to control motor action; It is characterized in that; Comprise microprocessor, command reception circuit, motor-drive circuit, current detection circuit, earthed switch position detecting circuit and motor drive direction change-over circuit; This command reception circuit, microprocessor link to each other with motor-drive circuit successively, and link to each other with motor through the output of this motor-drive circuit; The input of this current detection circuit links to each other with the output of motor-drive circuit, and the output of this current detection circuit links to each other with microprocessor; This earthed switch position detecting circuit is used to detect the current location of earthed switch and positional information is sent to microprocessor, and the input of this motor drive direction change-over circuit links to each other with microprocessor, and output then links to each other with motor.
2. the digital control protective device of a kind of electric ground switch as claimed in claim 1 is characterized in that, this motor-drive circuit adopts power field effect pipe, and the grid of this power field effect pipe links to each other with microprocessor, and drain electrode then links to each other with motor.
3. the digital control protective device of a kind of electric ground switch as claimed in claim 2 is characterized in that this current detection circuit is a sampling resistor, and this sampling resistor is connected between the source electrode and the earth of this power field effect pipe.
4. the digital control protective device of a kind of electric ground switch as claimed in claim 1 is characterized in that, this motor drive direction change-over circuit comprises two single-pole double throw relays that all are connected between microprocessor and the motor.
5. the digital control protective device of a kind of electric ground switch as claimed in claim 1 is characterized in that, also is provided with motor gear between this microprocessor and the motor and selects circuit, and this motor gearbox then adopts the twin-stage gear.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203947700U CN202309045U (en) | 2011-10-17 | 2011-10-17 | Digital control protection device for electric grounding switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203947700U CN202309045U (en) | 2011-10-17 | 2011-10-17 | Digital control protection device for electric grounding switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202309045U true CN202309045U (en) | 2012-07-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203947700U Expired - Fee Related CN202309045U (en) | 2011-10-17 | 2011-10-17 | Digital control protection device for electric grounding switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202309045U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103110355A (en) * | 2013-01-30 | 2013-05-22 | 苏州工业园区咖乐美电器有限公司 | Motor switching circuit of full automatic coffee machine |
| CN104332332A (en) * | 2014-10-31 | 2015-02-04 | 福州大学 | Interlocked control system for electric grounding switch |
| CN104795796A (en) * | 2015-04-22 | 2015-07-22 | 航天科工深圳（集团）有限公司 | Motor fault monitoring device and method of intelligent ring main unit |
| CN105098987A (en) * | 2015-08-25 | 2015-11-25 | 中天电气技术有限公司 | Medium-voltage intelligent switching equipment |
| WO2016041142A1 (en) * | 2014-09-16 | 2016-03-24 | 广东威灵电机制造有限公司 | Alarm determining method and apparatus for stalling of motor, and electric appliance |
| CN105892369A (en) * | 2016-05-24 | 2016-08-24 | 天津平高智能电气有限公司 | Integrated three-position switch control circuit |
-
2011
- 2011-10-17 CN CN2011203947700U patent/CN202309045U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103110355A (en) * | 2013-01-30 | 2013-05-22 | 苏州工业园区咖乐美电器有限公司 | Motor switching circuit of full automatic coffee machine |
| WO2016041142A1 (en) * | 2014-09-16 | 2016-03-24 | 广东威灵电机制造有限公司 | Alarm determining method and apparatus for stalling of motor, and electric appliance |
| CN104332332A (en) * | 2014-10-31 | 2015-02-04 | 福州大学 | Interlocked control system for electric grounding switch |
| CN104795796A (en) * | 2015-04-22 | 2015-07-22 | 航天科工深圳（集团）有限公司 | Motor fault monitoring device and method of intelligent ring main unit |
| CN105098987A (en) * | 2015-08-25 | 2015-11-25 | 中天电气技术有限公司 | Medium-voltage intelligent switching equipment |
| CN105892369A (en) * | 2016-05-24 | 2016-08-24 | 天津平高智能电气有限公司 | Integrated three-position switch control circuit |
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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: 20120704 Termination date: 20171017 |