CN206395633U - A kind of balance coefficient of elevator detection means based on no-load current - Google Patents

A kind of balance coefficient of elevator detection means based on no-load current Download PDF

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Publication number
CN206395633U
CN206395633U CN201621447072.1U CN201621447072U CN206395633U CN 206395633 U CN206395633 U CN 206395633U CN 201621447072 U CN201621447072 U CN 201621447072U CN 206395633 U CN206395633 U CN 206395633U
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China
Prior art keywords
current
elevator
balance coefficient
transformer
detection means
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Expired - Fee Related
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CN201621447072.1U
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Chinese (zh)
Inventor
刘小畅
曹奕刚
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Shanghai Special Equipment Supervision and Inspection Technology Institute
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Shanghai Special Equipment Supervision and Inspection Technology Institute
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Priority to CN201621447072.1U priority Critical patent/CN206395633U/en
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Publication of CN206395633U publication Critical patent/CN206395633U/en
Expired - Fee Related legal-status Critical Current
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Abstract

The utility model is related to a kind of balance coefficient of elevator detection means based on no-load current, including current transformer, current sensing means and computer, the first winding of the current transformer is connected with any one power line of the inverter input of elevator to be measured, current sensing means is connected with secondary winding, the output end of the current sensing means is connected with computer, and the computer calculates balance coefficient of elevator according to the current value detected.The utility model only needs a no-load running to obtain balance coefficient of elevator, and detection mode is very convenient, and substantially increases detection efficiency and save human cost.

Description

A kind of balance coefficient of elevator detection means based on no-load current
Technical field
The utility model is related to elevator detection technique field, more particularly to a kind of elevator balanced system based on no-load current Number detection means.
Background technology
During elevator periodic inspection, reviewer, which is frequently encountered car and decorate, causes car not use, and makes The live condition for not possessing detection coefficient of balance is obtained, leads to not detect balance coefficient of elevator.In addition, the electricity installed for early stage Ladder, because inspection rule did not claim to coefficient of balance at that time, therefore mostly, coefficient of balance did not complyed with requirement.
The detection of coefficient is balanced using current method under normal circumstances, it is necessary in car when being detected using current method 25%, 40%, 50%, 75%, 100%, the 110% of rated weight is loaded respectively and makees upper and lower whole operation respectively, whenever sedan-chair When railway carriage or compartment and counterweight run to same level position, the current value of motor is recorded, electric current-load curve is then drawn, with upper and lower The intersection point of row curve determines coefficient of balance, and the detection method very very complicated is, it is necessary to which longer time carries out many detections Operation.
Utility model content
Technical problem to be solved in the utility model is to provide a kind of balance coefficient of elevator detection based on no-load current Device so that detection is more convenient.
The utility model solves the technical scheme that its technical problem used:A kind of elevator based on no-load current is provided Coefficient of balance detection means, including current transformer, current sensing means and computer, the first winding of the current transformer It is connected with any one power line of the inverter input of elevator to be measured, current sensing means is connected with secondary winding, institute The output end for stating current sensing means is connected with computer, and the computer calculates elevator balanced system according to the current value detected Number.
The current transformer is Verification of Measuring Current Transformer.
The current sensing means includes current sensor and analog to digital conversion circuit, the current sensor and the electric current The secondary winding of transformer is connected, electric current and output current signal for detecting secondary winding in current transformer;The modulus Change-over circuit is connected with current sensor, for current signal to be converted into current value.
The current sensor is Hall current sensor.
Beneficial effect
As a result of above-mentioned technical scheme, the utility model compared with prior art, has the following advantages that and accumulated Pole effect:The utility model only needs a no-load running to obtain balance coefficient of elevator, and detection mode is very convenient, and significantly Improve detection efficiency and save human cost.The utility model need to only be detected to no-load current, due to detection Data only one of which, therefore substantially reduce detection error.
Brief description of the drawings
Fig. 1 is block diagram of the present utility model;
Fig. 2 is use schematic diagram of the present utility model.
Embodiment
With reference to specific embodiment, the utility model is expanded on further.It should be understood that these embodiments are merely to illustrate this Utility model rather than limitation scope of the present utility model.In addition, it is to be understood that reading the content of the utility model instruction Afterwards, those skilled in the art can make various changes or modifications to the utility model, and these equivalent form of values equally fall within this Shen Please appended claims limited range.
Embodiment of the present utility model is related to a kind of balance coefficient of elevator detection means based on no-load current, such as Fig. 1 It is shown, including current transformer, current sensing means and computer, the first winding of the current transformer and elevator to be measured Any one power line of inverter input is connected, and current sensing means, the current detecting dress are connected with secondary winding The output end put is connected with computer, and the computer calculates balance coefficient of elevator according to the current value detected.
Wherein, the current transformer is Verification of Measuring Current Transformer.Current transformer be measuring instrumentss in power system, The secondary devices such as relay protection obtain the sensor of electrical primary loop current information, and current transformer changes electric current in proportion Into low current, current transformer primary side is connected on any one power line of the inverter input of elevator to be measured, secondary side Connect measuring instrumentss.During normal work, Current Transformer Secondary side is near short circuit state, and output voltage is very low.In operation If secondary winding is in closure state, therefore the impedance very little of measuring instrumentss all the time, the electricity of secondary side can be directly detected Stream.Current transformer can select AKH-0.66II type low pressure measurement Current Transformers in present embodiment.
The current sensing means includes current sensor and analog to digital conversion circuit, the current sensor and the electric current The secondary winding of transformer is connected, electric current and output current signal for detecting secondary winding in current transformer;The modulus Change-over circuit is connected with current sensor, for current signal to be converted into digitized current value.It is described in present embodiment Current sensor can select Hall current sensor.Hall current sensor is serially connected in secondary winding in current transformer, is used Electric current and output current signal in detection Current Transformer Secondary side.Hall current sensor uses 24V powered by direct current, supplies Electricity is responsible for by alterating and direct current converter, and alterating and direct current converter receives 220V alternating currents, transformed backward Hall current sensor Export 24V direct currents.Analog to digital conversion circuit can select data collecting card, and data collecting card is connected with Hall current sensor Connect, for current signal to be converted into digitized current value.
Before using the utility model detection, reviewer first has to confirm whether power network input voltage is 380V, car It is unloaded downwards when elevator speed whether be normal speed, and type of drive, type of belt drive, be new elevator or old ladder to be installed (boots and rail friction efficiency are led in influence) etc..
As shown in Fig. 2 during detection, the primary side of current transformer of the present utility model being clamped in into inverter input and appointed Anticipate on a power line, car is unloaded, bottom terminal landing is run to from top end station with normal condition, when car is concordant with counterweight When, record current sensing means of the present utility model and be capable of detecting when current values, being calculated by computer to be balanced Coefficient.Specific Computing Principle is as follows:
For frequency-varying driving elevator, there is following relation in motor input power with power output:PEnterηAlways=PGo out.Wherein: Motor input powerPower output PGo out=kQVIt is emptyG, total transmission efficiency ηAlways1·η2
Thus coefficient of balance k is represented by:
In above formula:K is coefficient of balance;IIt is emptyFor the no-load current of inverter input car, when current transformer primary side When identical with the umber of turn of secondary side, the value that current sensing means is detected is exactly no-load current, if current transformer one When secondary side is different with the umber of turn of secondary side, the value that current sensing means is detected is multiplied by with current transformer primary side and two The turn ratio of secondary side is exactly no-load current;For transducer power factor, for frequency transformer for elevator, generally 0.9;η1Table Show worm couple transmission efficiency, generally 0.8, it is 1 for permanent magnetic synchronous traction machine;η2Represent in addition to worm couple Transmission, travelling mechanism efficiency, including traction sheave steel wire rope are secondary, lead boots and rail friction efficiency etc., generally 0.9;Q is elevator volume Determine loading capacity;VIt is emptyFor the downward speed of service of elevator no-load;G is acceleration of gravity.

Claims (4)

1. a kind of balance coefficient of elevator detection means based on no-load current, it is characterised in that examined including current transformer, electric current Survey device and computer, the first winding of the current transformer and any one power supply of the inverter input of elevator to be measured Line is connected, and current sensing means is connected with secondary winding, the output end of the current sensing means is connected with computer, described Computer calculates balance coefficient of elevator according to the current value detected.
2. the balance coefficient of elevator detection means according to claim 1 based on no-load current, it is characterised in that the electricity Current transformer is Verification of Measuring Current Transformer.
3. the balance coefficient of elevator detection means according to claim 1 based on no-load current, it is characterised in that the electricity Flow detection device includes current sensor and analog to digital conversion circuit, the current sensor and the current transformer it is secondary around Group is connected, electric current and output current signal for detecting secondary winding in current transformer;Analog-digital conversion circuit as described and electric current Sensor is connected, for current signal to be converted into current value.
4. the balance coefficient of elevator detection means according to claim 3 based on no-load current, it is characterised in that the electricity Flow sensor is Hall current sensor.
CN201621447072.1U 2016-12-27 2016-12-27 A kind of balance coefficient of elevator detection means based on no-load current Expired - Fee Related CN206395633U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201621447072.1U CN206395633U (en) 2016-12-27 2016-12-27 A kind of balance coefficient of elevator detection means based on no-load current

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201621447072.1U CN206395633U (en) 2016-12-27 2016-12-27 A kind of balance coefficient of elevator detection means based on no-load current

Publications (1)

Publication Number Publication Date
CN206395633U true CN206395633U (en) 2017-08-11

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107458940A (en) * 2017-09-12 2017-12-12 上海辛格林纳新时达电机有限公司 A kind of method, apparatus and frequency converter for determining balance coefficient of elevator

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107458940A (en) * 2017-09-12 2017-12-12 上海辛格林纳新时达电机有限公司 A kind of method, apparatus and frequency converter for determining balance coefficient of elevator
CN107458940B (en) * 2017-09-12 2019-09-20 上海辛格林纳新时达电机有限公司 A kind of method, apparatus and frequency converter of determining balance coefficient of elevator

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CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20170811

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CF01 Termination of patent right due to non-payment of annual fee