CN101820247A - Electric control loop of elevator main motor - Google Patents
Electric control loop of elevator main motor Download PDFInfo
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- CN101820247A CN101820247A CN201010139909A CN201010139909A CN101820247A CN 101820247 A CN101820247 A CN 101820247A CN 201010139909 A CN201010139909 A CN 201010139909A CN 201010139909 A CN201010139909 A CN 201010139909A CN 101820247 A CN101820247 A CN 101820247A
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- main motor
- power supply
- control loop
- electric control
- driver element
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Abstract
The invention relates to an electric control loop of an elevator main motor, which comprises a three-phase AC power supply line, a contractor, a power supply unit, a DC power supply switch unit, a driving unit and a main motor. The three-phase AC power supply line inputs a three-phase AC to the power supply unit by the contractor, the power supply unit converts the three-phase AC into a DC and inputs the DC to the driving unit by the DC power supply switch unit, the driving unit converts the DC into three-phase AC and provides the three-phase AC to the main motor, the DC power supply switch unit comprises a first switch element, one end of the first switch element is connected with the first DC input end of the driving unit, the other end of the first switch element is provided with two contacts, a first contact is connected with the first DC output end of the power supply unit, a second contact is connected with the second DC output end of the power supply unit or the second DC input end of the driving unit, and the first switch element controls the electric connection of the first contact or the second contact. The electric control loop of the elevator main motor is safer and more effective.
Description
Technical field
The invention belongs to elevator electric circuit field, especially relate to a kind of electric control loop of elevator main motor.
Background technology
Elevator is the equipment of riding instead of walk of indispensable vertical lift in the daily life.The lifting of elevator is to carry out elevating movement by the main motor that lift drive electrical device drives elevator to realize.There are strict requirements to the control method that stops main motor running in the elevator safety regulations.See also Fig. 1, it is the legacy hosts motor electric control loop that meets the elevator safety regulations.For the alternating current asynchronous commonly used or the main motor of permanent-magnet synchronous, three-phase ac power cord L1, L2, the L3 of main motor electric control loop import three-phase alternating current R, S, T respectively, be connected with the three-phase alternating current electric wire of main motor 20 again after the VVVF modulation frequency conversion by variable frequency drive unit 10, suitable three-phase alternating-current supply U, V, W be provided for main motor 20.Please consult Fig. 2 simultaneously, it is the internal structure circuit diagram of variable frequency drive unit 10 shown in Figure 1.Variable frequency drive unit 10 comprises rectification circuit 11, charging circuit 12, direct current smoothing capacity C1 and inverter circuit 13.Charging circuit 12 comprises switch RL parallel with one another and resistance R 1, and it is serially connected between rectification circuit 11 dc output ends and the capacitor C 1, is the pre-charge circuit to capacitor C 1.Three-phase alternating current R, S, T by rectification circuit 11 the AC-DC rectification and the adjustment of charging circuit 12 and capacitor C 1 after output DC, direct current converts alternating current to through the DC-AC of inverter circuit 13, exports suitable three-phase alternating current U, V, W to main motor.
In order effectively to control the running that stops main motor, the first contactor K1 is separately positioned between three-phase ac power cord and the driver element 10, and the second contactor K2 is separately positioned between the three-phase alternating current electric wire of driver element 10 and main motor; Wherein, the first contactor K1 is controlled by safety return circuit, and the second contactor K2 is furnished with auxiliary contact, and every operation once just must be cut off once, makes control device can detect the failure conditions of K2.If the power of motor then can not be reliably cut off in the adhesion of three-phase ac contactor two-phase, therefore using two contactors is in order to improve safe redundancy.But sort circuit can not be got rid of the possibility that two contactors stick together, and the also failure conditions of indirect detection contact just of auxiliary contact, therefore has the leak of safety.
Summary of the invention
The objective of the invention is to overcome shortcoming of the prior art with not enough, a kind of electric control loop of elevator main motor more safely and effectively is provided.
A kind of electric control loop of elevator main motor comprises three-phase ac power cord, contactor, power subsystem, DC power supply switch unit, driver element and main motor.Three-phase ac power cord is imported three-phase alternating current to power subsystem by contactor, power subsystem converts three-phase alternating current to direct current, input to driver element by the DC power supply switch unit, driver element is converted to three-phase alternating current once more with direct current and offers main motor.
Further, the DC power supply switch unit comprises one first switch element, one end of this first switch element is connected with first direct-flow input end of driver element, the other end of this first switch element has two contacts, first contact is connected with first dc output end of power subsystem, second contact is connected with second dc output end of power subsystem or second direct-flow input end of driver element, and this first switch element is controlled the electrical connection of first contact or second contact.
With respect to prior art, it is the safety outage control of may command elevator main motor that electric control loop of elevator main motor of the present invention only needs by a DC power supply switch unit.
In order to understand the present invention more clearly, set forth the specific embodiment of the present invention below with reference to description of drawings.
Description of drawings
Fig. 1 is a prior art electric control loop of elevator main motor block diagram.
Fig. 2 is the circuit diagram of variable frequency drive unit shown in Figure 1.
Fig. 3 is an electric control loop of elevator main motor block diagram of the present invention.
Fig. 4 is the circuit diagram of power subsystem shown in Figure 3.
Fig. 5 is the circuit diagram of driver element shown in Figure 3.
Fig. 6 is the circuit diagram of first execution mode of DC power supply switch unit shown in Figure 3.
Fig. 7 is the working state circuit schematic diagram of electric control loop of elevator main motor shown in Figure 3.
Fig. 8 is the circuit diagram of second execution mode of DC power supply switch unit shown in Figure 3.
Embodiment
See also Fig. 3, it is an electric control loop of elevator main motor block diagram of the present invention.This electric control loop of elevator main motor comprises three-phase ac power cord L1, L2, L3, contactor K, power subsystem 100, DC power supply switch unit 200, driver element 300 and main motor 400.Three-phase ac power cord L1, L2, L3 import three-phase alternating current R, S, T to power subsystem 100 by contactor K.Power subsystem 100 converts alternating current to direct current, inputs to driver element 300 by DC power supply switch unit 200.Driver element 300 with direct current be converted to alternating current U, V once more, W offers main motor 400.The galvanic power on/off of DC power supply switch unit 200 controls.
Please consult Fig. 4 simultaneously, it is the internal circuit schematic diagram of power subsystem 100 shown in Figure 3.A charging circuit 120 and a capacitor C 1 that this power subsystem 100 comprises the rectification circuit 110 be made up of a plurality of diode D1～D6, is made up of a resistance R 1 and the switch RL in parallel with it.This capacitor C 1 is in parallel with rectification circuit 110, and this charging circuit 120 is serially connected between rectification circuit 110 and the capacitor C 1.Please consult Fig. 5 simultaneously, it is the internal circuit schematic diagram of driver element 300 shown in Figure 3.The inverter circuit that this driver element 300 is made up of a plurality of IGBT pipes and diode.Three-phase ac power cord L1, L2, L3 provide voltage to be respectively the three-phase current of R, S, T by contactor K to power subsystem 100, rectification circuit 110 by power subsystem 100 carries out the AC-DC conversion, and after carrying out rectification by charging circuit 120 and capacitor C 1, from P1, N1 end output DC.P1 and N1 insert direct-flow input end P2, the N2 of driver element 300 by DC power supply switch 200.After the DC-AC conversion of the direct current of input driver element 300 by its inverter circuit, provide suitable three-phase current U, V, W to main motor 400.Because rectification circuit 110 and inverter circuit 300 are existing circuit structure, do not repeat them here.
See also Fig. 6, it is the electrical block diagram of first execution mode of DC power supply switch unit 200 shown in Figure 3.This DC power supply switch unit 200 comprises one first switch element 210, one first resistance R 1, a testing circuit 220 and a fuse 202.In the present embodiment, this first switch element 210 is relays, and J1, J2 are its power interface.The first link a of this relay is connected with the direct-flow input end P2 of driver element, and second link of relay has one first contact b and one second contact c.The first contact b is a normally opened contact, is connected with the dc output end P1 of power subsystem 100 by fuse 202; The second contact c is a normally-closed contact, is connected with another dc output end N1 of power subsystem 100 and another direct-flow input end N2 of driver element 300 simultaneously by first resistance R 1.Relay control respectively with the first contact b or the second contact c closure.This testing circuit 220 is connected in series with a photoelectrical coupler D by one second resistance R 2 and constitutes, and an end of this testing circuit 220 is connected with the first contact b, and the other end of testing circuit 220 is connected with the dc output end N1 of power subsystem 100.Wherein, the output of photoelectrical coupler D is electrically connected with the control device (figure does not show) of outside by interface end J3, J4.
Below specify the operation principle of this DC power supply switch unit 200:
When relay power, the first contact b closure of relay.At this moment, the dc output end P1 of power subsystem 100 and the direct-flow input end P2 of driver element 300 connect, driver element 300 energisings, and it converts direct current to alternating current rear drive main motor 400.Meanwhile, testing circuit 220 constitutes the loop with dc output end P1, the N1 of power subsystem 100, and testing circuit 220 has electric current to pass through, and the external control device can detect and show the conducting state of this moment by this testing circuit 220.When relay electric-loss and the first contact b when sticking together, testing circuit 220 has electric current to pass through, and the external control device can detect the failure conditions of relay by this testing circuit 220.
When the relay no power, the second contact c closure of relay.At this moment, the dc output end P1 of power subsystem 100 and the direct-flow input end P2 of driver element 300 disconnect, driver element 300 no direct current energisings, and the power of main motor 400 is cut off.Meanwhile, testing circuit 220 no currents pass through, and the external control device detects and is no conducting state.
As shown in Figure 7, it is the working state circuit schematic diagram that the relay no current passes through.When the driving of relay no current, the second contact c closure of relay, direct-flow input end P2, the N2 of driver element 300 are by first resistance R, 1 short circuit simultaneously.For permagnetic synchronous motor, be equivalent to the rectification circuit that the fly-wheel diode of main motor 400 three-phase alternating current lines by driver element 300 constitute and carry out short circuit; Utilize the power generation characteristics of permagnetic synchronous motor, make main motor 400 have a self-locking torque, therefore can when main motor 400 band-type brakes are opened and lost efficacy, effectively prevent elevator slide car, thus the fail safe that has improved elevator.
In addition, this fuse 202 and first resistance R 1 mainly shield.When the first contact b and the second contact c break down adhesion, the fuse 202 and first resistance R 1 form the loop with dc output end P1, the N1 of power subsystem 100, first resistance R 1 has a suitable resistance, under the prerequisite of not damaging other elements, blow fuse 202 thereby have a suitable current, thereby guarantee that driver element 300 is cut off reliably.
See also Fig. 8, it is the electrical block diagram of second execution mode of DC power supply switch unit 200 shown in Figure 3.As further improvement to first execution mode of DC power supply switch unit 200, be provided with a second switch element 230 at the second contact c of first switch element 210 and second dc output end of power subsystem and the second direct-flow input end link of driver element, in order to being electrically connected of second direct-flow input end of second dc output end of control contact point c and power subsystem or driver element.In the present embodiment, second switch element 230 is a relay.Even first switch element 210 complete failure that is in operation like this, second switch element 230 also can cut off DC loop, increases safety redundancy.
The relay of first switch element 210 of the present invention and second switch unit 230 can also be replaced with other switch element, as contactor, controllable silicon, bidirectional triode thyristor or IGBT switch elements such as (insulated gate bipolar transistors).In addition, the testing circuit formed of current-limiting resistance R2 and photoelectrical coupler D can use the circuit of other similar functions such as relay circuit to substitute.
With respect to prior art, the present invention is divided into power subsystem and driver element with variable frequency drive unit of the prior art, and a direct current power switch unit is set between power subsystem and driver element, can directly cut off the DC driven power supply of main motor, can reduce the arcing phenomenon, and can effectively prevent to damage the semiconductor element of inverter circuit, realize security control.In addition, the relay of this DC power supply switch unit control single-pole double-throw switch (SPDT) constitutes switching electricity two states, and by a testing circuit in order to show the state of its power on/off, can detect the adhesion situation of single-pole double-throw switch (SPDT) contact point simultaneously, improve fail safe.The fuse and first resistance can provide fail safe, avoid circuit element to be burnt out when the adhesion of single-pole double-throw switch (SPDT) contact point.Relay of the present invention or other can be equal to the thyristor of replacement than the contactor cheapness, and can reduce or eliminate the noise of contactor.And the short circuit function of the additional permanent magnetism main motor fail safe that improved elevator.
The present invention is not limited to above-mentioned execution mode, if various changes of the present invention or distortion are not broken away from the spirit and scope of the present invention, if these changes and distortion belong within claim of the present invention and the equivalent technologies scope, then the present invention also is intended to comprise these changes and distortion.
Claims (9)
1. an electric control loop of elevator main motor is characterized in that: comprise three-phase ac power cord, contactor, power subsystem, DC power supply switch unit, driver element and main motor; Described three-phase ac power cord inserts power subsystem by contactor, and power subsystem converts three-phase alternating current to direct current, inserts driver element by the DC power supply switch unit, and driver element is converted to three-phase alternating current once more with direct current and offers main motor.
2. electric control loop of elevator main motor according to claim 1, it is characterized in that: described DC power supply switch unit comprises one first switch element, first link of this first switch element is connected with first direct-flow input end of driver element, second link of this first switch element has two contacts, first contact is a normally opened contact, be connected with first dc output end of power subsystem, second contact is a normally-closed contact, be connected with second dc output end of power subsystem or second direct-flow input end of driver element, this first switch element is controlled the power on/off of described driver element.
3. electric control loop of elevator main motor according to claim 2, it is characterized in that: further comprise a second switch element, second contact that described second switch element is controlled described first switch element is connected with second dc output end of power subsystem or second direct-flow input end of driver element.
4. according to claim 2 or 3 described electric control loop of elevator main motor, it is characterized in that: described first switch element and second switch element are a kind of among relay, contactor, controllable silicon, bidirectional triode thyristor or the IGBT.
5. according to claim 2 or 3 described electric control loop of elevator main motor, it is characterized in that: described DC power supply switch unit also comprises one first resistance, and it is serially connected on the branch road of second contact of first switch element.
6. electric control loop of elevator main motor according to claim 5, it is characterized in that: described DC power supply switch unit further comprises a testing circuit, be serially connected between the end and driver element second direct-flow input end that the DC power supply switch unit is connected with driver element first direct-flow input end, be used to detect the power supply situation of driver element and be connected with an external control device.
7. electric control loop of elevator main motor according to claim 6 is characterized in that: described testing circuit is composed in series by a current-limiting resistance and photoelectrical coupler.
8. electric control loop of elevator main motor according to claim 6 is characterized in that: described testing circuit is made up of a relay circuit.
9. electric control loop of elevator main motor according to claim 6 is characterized in that: described DC power supply switch unit further comprises a fuse, and it is serially connected between first dc output end of first contact of switch element and power subsystem.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010139909A CN101820247A (en) | 2010-03-31 | 2010-03-31 | Electric control loop of elevator main motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010139909A CN101820247A (en) | 2010-03-31 | 2010-03-31 | Electric control loop of elevator main motor |
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| CN101820247A true CN101820247A (en) | 2010-09-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201010139909A Pending CN101820247A (en) | 2010-03-31 | 2010-03-31 | Electric control loop of elevator main motor |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103296937A (en) * | 2012-02-22 | 2013-09-11 | 珠海格力电器股份有限公司 | Control circuit and control method of direct-current motor |
| CN104192656A (en) * | 2014-08-27 | 2014-12-10 | 刘瑞 | Control circuit for interlocking between contactors of elevator |
| TWI475787B (en) * | 2012-12-14 | 2015-03-01 | Mitsubishi Electric Corp | Inverter device |
| CN107872188A (en) * | 2016-09-26 | 2018-04-03 | 通力股份公司 | motor driver |
| CN110808567A (en) * | 2020-01-08 | 2020-02-18 | 浙江众合科技股份有限公司 | Signal machine electronic execution circuit based on fault safety |
-
2010
- 2010-03-31 CN CN201010139909A patent/CN101820247A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103296937A (en) * | 2012-02-22 | 2013-09-11 | 珠海格力电器股份有限公司 | Control circuit and control method of direct-current motor |
| TWI475787B (en) * | 2012-12-14 | 2015-03-01 | Mitsubishi Electric Corp | Inverter device |
| CN104192656A (en) * | 2014-08-27 | 2014-12-10 | 刘瑞 | Control circuit for interlocking between contactors of elevator |
| CN107872188A (en) * | 2016-09-26 | 2018-04-03 | 通力股份公司 | motor driver |
| CN110808567A (en) * | 2020-01-08 | 2020-02-18 | 浙江众合科技股份有限公司 | Signal machine electronic execution circuit based on fault safety |
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| C06 | Publication | ||
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| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C53 | Correction of patent for invention or patent application | ||
| CB02 | Change of applicant information |
Address after: 529000, No. 105, Jinshan building, No. 82, Jianshe Road, Guangdong, Jiangmen Applicant after: Jiangmen Modrol Electric Co., Ltd. Address before: 529000, No. 105, Jinshan building, No. 82, Jianshe Road, Guangdong, Jiangmen Applicant before: Jiangmen Mengde Electric Co., Ltd. |
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| COR | Change of bibliographic data |
Free format text: CORRECT: APPLICANT; FROM: JIANGMEN MENGDE ELECTRIC CO., LTD. TO: JIANGMEN MODROL ELECTRIC CO., LTD. |
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| C53 | Correction of patent for invention or patent application | ||
| CB02 | Change of applicant information |
Address after: 529100 No. 49, Yongkang Road, Jiangmen, Guangdong Applicant after: Jiangmen Modrol Electric Co., Ltd. Address before: 529000, No. 105, Jinshan building, No. 82, Jianshe Road, Guangdong, Jiangmen Applicant before: Jiangmen Modrol Electric Co., Ltd. |
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| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20100901 |