CN216086511U - Double-speed control circuit of permanent magnet motor frequency conversion control system for elevator - Google Patents
Double-speed control circuit of permanent magnet motor frequency conversion control system for elevator Download PDFInfo
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- CN216086511U CN216086511U CN202121823835.9U CN202121823835U CN216086511U CN 216086511 U CN216086511 U CN 216086511U CN 202121823835 U CN202121823835 U CN 202121823835U CN 216086511 U CN216086511 U CN 216086511U
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Abstract
The utility model discloses a double-speed control circuit of a permanent magnet motor frequency conversion control system for a hoister, which is used for driving and transforming the permanent magnet motor of the hoister and comprises the following components: the control unit is used for controlling a permanent magnet motor of the elevator, the slow turning unit is used for realizing slow turning operation of the elevator after the permanent magnet motor is transformed in the maintenance process, the slow turning unit is connected in series in a wiring circuit of the control unit, the slow turning unit is connected with a frequency converter of the control unit, and a self-locking point of the control unit is connected with the slow turning unit. The utility model has the beneficial effects that: through the modification setting of slow-turning start-stop control box and frequency converter parameters, under the condition that investment is hardly increased, the double-speed control of the variable-frequency intelligent control of the permanent magnet motor of the elevator can be realized, and the preset frequency of the reciprocating power chamber modification during normal production and maintenance slow-turning switching of the elevator is avoided.
Description
Technical Field
The utility model belongs to the technical field of motor rotating speed control in the technical field of permanent magnet motor control, and particularly relates to a double-speed control circuit of a permanent magnet motor variable frequency control system for a hoist, which is applied to the improvement of the hoist.
Background
At present, a low-speed large-torque permanent magnet synchronous motor driving system is gradually applied and popularized to elevator equipment, the traditional driving system of an original asynchronous motor, a hydraulic coupler, a speed reducer and auxiliary transmission (namely a slow-turning device) is replaced, the original auxiliary transmission (namely a slow-turning link for overhauling an elevator) is omitted, and therefore the following problems are caused:
1. in a driving and transforming project of a permanent magnet motor of a hoist, the preset frequency of a driving frequency converter is conventionally set as a rated frequency, whether the driving frequency converter is started remotely in a central control room or by a field machine, the driving frequency converter is driven by a terminal of the frequency converter to run according to the preset frequency, and slow rotation control used for overhauling, checking and replacing a hopper cannot be used continuously;
2. in the maintenance process, after the permanent magnet motor is transformed, the slow-rotating operation of the hoister is realized, the preset frequency of a frequency converter is modified to be low-frequency and low-speed on a frequency converter panel of a central control room or an electric power room, and then the low-speed slow-rotating starting and stopping control on the central control room or beside the hoister can be realized;
3. when the hoister is overhauled and the slow-turning state is not used any more, a specially-assigned person must change the preset frequency of the frequency converter to the rated frequency during normal production, and if the specially-assigned person forgets to change the preset frequency to the rated frequency (but still starts the machine at low frequency and low speed) to organize production, the material pressing accident of the hoister is caused (the phenomenon occurs in a plurality of enterprises).
In order to avoid inconvenience and trouble caused by repeatedly modifying the preset frequency of a frequency converter of the elevator in two states of maintenance and normal production, a reliable double-speed control mode of the permanent magnet motor frequency conversion control system for the elevator is designed through repeated discussion and practice.
In summary, there is an urgent need for a dual-speed control circuit of a variable frequency control system of a permanent magnet motor for an elevator to realize simple, safe and reliable switching between slow rotation and conventional rotation speed of the elevator.
Disclosure of Invention
In order to overcome the defects of the prior art, the utility model provides a double-speed control circuit of a permanent magnet motor frequency conversion control system for a hoister.
The utility model adopts the following specific technical scheme:
the utility model provides a permanent-magnet machine variable frequency control system's for lifting machine double speed control circuit for lifting machine permanent-magnet machine drive reforms transform, includes:
-a control unit for controlling the permanent magnet motor of the hoisting machine;
and the slow rotation unit is used for realizing slow rotation operation of the elevator after the permanent magnet motor is transformed in the maintenance process.
The slow turning unit is connected in series in a wiring circuit of the control unit, the slow turning unit is connected with a frequency converter of the control unit, and a self-locking point of the control unit is connected with the slow turning unit.
By adopting the design, the frequency converter is debugged according to the normal steps firstly, so that a complete permanent magnet synchronous motor model is established, the frequency converter has normal operation conditions, and is switched to the slow rotation unit when debugging or maintenance is needed, thereby not only realizing central control and on-site main frequency operation starting, but also realizing on-site slow rotation inching double-rotation-speed operation control, solving the problem that the preset frequency of the frequency converter is modified by a round-trip power room when the elevator is in normal production and maintenance slow rotation switching, and simultaneously solving the problem that a special person must change the preset frequency of the frequency converter back to the rated frequency during normal production when the slow rotation state is not used any more, and realizing safe production if the frequency converter forgets to change back to the rated frequency (but still at low frequency and low speed) to start up and organize production.
As a further improvement of the utility model, the slow turning unit is connected in series in a junction box of the permanent magnet motor. The slow rotation unit is connected in series in the junction box of the permanent magnet motor, so that the wiring is convenient, the operation is easy, and the transformation cost is low.
As a further improvement of the utility model, the outgoing line of the slow turning unit is connected with an intermediate relay of the frequency converter. A relay is an electronic control device having a control system, also known as an input loop, and a controlled system, also known as an output loop, typically used in automatic control circuits, which is actually an "automatic switch" that uses a small current to control a large current. Therefore, the slow-turning circuit plays a role in automatic adjustment, safety protection, circuit conversion and the like, and the outgoing line of the slow-turning unit is connected with the intermediate relay of the frequency converter, so that the aim of controlling the slow-turning unit and the small current to control the large current through the frequency converter is fulfilled.
Preferably, the outgoing line of the slow turning unit is connected with a coil of a variable-frequency intermediate relay.
The self-locking contact of the frequency converter is connected with a stop button of the slow-turning unit to play a role in stopping the tail part of the elevator suddenly.
Preferably, the slow turning unit is packaged in a closed box body and is connected with the junction box and the frequency converter through outgoing lines.
The utility model has the positive effects that: through adding the modification setting of a slow-turning start-stop control box and frequency converter parameters, under the condition that investment is hardly increased, the double-speed control of the variable-frequency intelligent control of the permanent magnet motor of the elevator can be realized, the operation of modifying the preset frequency in a reciprocating power room when the elevator is normally produced and overhauled and slowly turned is avoided, and the operation convenience and the safety and reliability of the elevator are improved.
Drawings
FIG. 1 is an original control schematic diagram of a double-speed control circuit of a permanent magnet motor frequency conversion control system for a hoist to be reformed;
fig. 2 is a control schematic diagram of a modified double-speed control circuit of a permanent magnet motor variable frequency control system for a hoist.
Detailed Description
The utility model is described in detail below with reference to the following figures and specific embodiments:
the specific embodiment is as follows:
in the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the utility model and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the utility model.
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.
Specific implementations of the present invention are described in detail below with reference to specific embodiments.
The first embodiment is as follows:
as shown in figure 1, in the control schematic diagram of the original elevator, an outgoing line 07 of a button box SSB1 beside the elevator is disconnected from a KA2 normally open point, the button box for slow rotation of the elevator is connected in series, then the outgoing line is connected to a coil of a slow rotation driving intermediate relay KA3 of a frequency converter, meanwhile, a self-locking contact of a driving relay KA2 of the original frequency converter is connected to the back of a stop button of the slow rotation button box, so that the tail part of the elevator is suddenly stopped, the double-speed control schematic diagram after modification is shown in figure 2, a control loop is simple and clear, and a main loop is not required to be modified.
When in specific use:
1. the frequency converter is debugged according to normal steps, so that a complete permanent magnet synchronous motor model is established and normal operation conditions are met.
2. Defining parameters of a frequency converter DI1 as forward rotation starting through F4-00=1 (for driving of main running frequency, parameters F0-03=1 can be set in a main frequency rotating speed setting mode, and then the preset frequency of the frequency converter DI1 is set through a panel F0-08); the DI2 parameter is defined as positive jog by F4-01=4 (for slow turn frequency drive, the slow turn preset frequency is set by F8-00). The forward rotation starting (main frequency operation) and the forward rotation inching (slow rotation operation) have respective corresponding acceleration and deceleration time, and can be correspondingly set according to the actual requirements of different elevators.
When an SBB1 knob on the machine side is turned to a central control position, the central control is started, the KA2 is electrified, the DI1 is assigned, and the frequency converter drives the permanent magnet motor of the elevator to operate according to the main operation frequency; when the SBB1 knob is turned to the site position, and the SBB1 start button SB1 is pressed, the frequency converter drives the permanent magnet motor of the elevator to operate according to the main operation frequency as the central control start; when the SBB1 knob is turned to the site position and the start button SB4 of the slow-turning control box SBB2 is pressed, the KA3 is electrified to attract the DI2 for assignment, the frequency converter drives the permanent magnet motor of the elevator to run in a slow-turning mode according to the forward rotation inching (slow-turning) frequency, and the low rotation speed can be used for daily overhaul and inspection of the elevator. Therefore, the main frequency operation starting of central control and site is realized, and the double-rotating-speed operation control of site slow-rotating inching can be realized.
The second embodiment is as follows:
on the basis of the first specific embodiment, the slow turning unit is packaged in a closed box body and is connected with the junction box, namely the frequency converter, through an outgoing line. Therefore, the slow turning unit can be prevented from being exposed in the process of overhauling or debugging, safety accidents such as electric shock and the like are avoided, and safe production is realized.
The foregoing has outlined broadly some of the aspects and features of the various embodiments, which should be construed to be merely illustrative of various potential applications. Other beneficial results can be obtained by applying the disclosed information in a different manner or by combining various aspects of the disclosed embodiments. Other aspects and a more complete understanding may be obtained by reference to the detailed description of the exemplary embodiments taken in conjunction with the accompanying drawings, based on the scope defined by the claims.
The above examples illustrate the present invention in detail. It is to be understood that the above description is not intended to limit the present invention, and the present invention is not limited to the above examples, and that various changes, modifications, additions, deletions, and substitutions which may be made by those skilled in the art within the spirit of the present invention are also within the scope of the present invention.
Claims (6)
1. The utility model provides a permanent-magnet machine variable frequency control system's for lifting machine double speed control circuit for lifting machine permanent-magnet machine drive reforms transform, includes:
-a control unit for controlling the permanent magnet motor of the hoisting machine;
the slow rotation unit is used for realizing slow rotation operation of the elevator after the permanent magnet motor is transformed in the maintenance process;
the method is characterized in that:
the slow turning unit is connected in series in a wiring circuit of the control unit, the slow turning unit is connected with a frequency converter of the control unit, and a self-locking point of the control unit is connected with the slow turning unit.
2. The dual-speed control circuit of the variable frequency control system of the permanent magnet motor for the elevator as claimed in claim 1, wherein the slow turning unit is connected in series in a junction box of the permanent magnet motor.
3. The dual-speed control circuit of the variable frequency control system of the permanent magnet motor for the elevator as claimed in claim 2, wherein the outgoing line of the slow turning unit is connected with a variable frequency intermediate relay.
4. The dual-speed control circuit of the variable frequency control system of the permanent magnet motor for the elevator as claimed in claim 3, wherein the outgoing line of the slow turning unit is connected with the coil of the intermediate relay for variable frequency.
5. The double-speed control circuit of the permanent magnet motor frequency conversion control system for the elevator as claimed in any one of claims 2 to 4, wherein the self-locking contact of the frequency converter is connected with the stop button of the slow-turning unit to play a role of emergency stop of the tail of the elevator.
6. The dual-speed control circuit of the variable frequency control system of the permanent magnet motor for the elevator as claimed in claim 5, wherein the slow turning unit is enclosed in a closed box and connected to the junction box and the frequency converter through lead wires.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121823835.9U CN216086511U (en) | 2021-08-06 | 2021-08-06 | Double-speed control circuit of permanent magnet motor frequency conversion control system for elevator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121823835.9U CN216086511U (en) | 2021-08-06 | 2021-08-06 | Double-speed control circuit of permanent magnet motor frequency conversion control system for elevator |
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| Publication Number | Publication Date |
|---|---|
| CN216086511U true CN216086511U (en) | 2022-03-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121823835.9U Active CN216086511U (en) | 2021-08-06 | 2021-08-06 | Double-speed control circuit of permanent magnet motor frequency conversion control system for elevator |
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| CN (1) | CN216086511U (en) |
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- 2021-08-06 CN CN202121823835.9U patent/CN216086511U/en active Active
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| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: A Dual Speed Control Circuit for a Permanent Magnet Motor Variable Frequency Control System for Elevators Granted publication date: 20220318 Pledgee: Qilu Bank Co.,Ltd. Rizhao Branch Pledgor: RIZHAO DONGFANG MOTOR Co.,Ltd. Registration number: Y2024370010078 |