CN114389513A - Redundant self-locking driving control device for frequency converter of cigarette equipment - Google Patents
Redundant self-locking driving control device for frequency converter of cigarette equipment Download PDFInfo
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- CN114389513A CN114389513A CN202111512793.1A CN202111512793A CN114389513A CN 114389513 A CN114389513 A CN 114389513A CN 202111512793 A CN202111512793 A CN 202111512793A CN 114389513 A CN114389513 A CN 114389513A
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- Prior art keywords
- relay
- frequency converter
- normally open
- coil
- open switch
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P27/00—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage
- H02P27/04—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/08—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors
- H02H7/0833—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors for electric motors with control arrangements
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Electric Motors In General (AREA)
Abstract
The invention discloses a redundant self-locking drive control device for a frequency converter of cigarette equipment, which is mainly designed and conceived in the technical scheme that an output cut-off mechanism is provided for the frequency converter by a second relay, a contactor, a time relay and a first relay in cooperation, specifically, the contactor is connected between the frequency converter and a motor, a second relay coil is connected with the frequency converter, the time relay coil and a first relay coil are connected in parallel with an operation signal source, a specific normally open switch of the first relay is respectively connected with a power supply source and the contactor coil, and the normally open switches of the second relay and the time relay are connected in series and then connected in parallel with the specific normally open switch of the first relay to form a cut-off circuit with a self-locking mechanism. The invention can ensure the safe and reliable disconnection of the contactor, thereby safely and reliably cutting off the path between the motor and the frequency converter in a specific scene, and particularly, the time relay and the second relay form a safe redundant design.
Description
Technical Field
The invention relates to the field of cigarette manufacturing equipment, in particular to a redundant self-locking drive control device for a frequency converter of cigarette equipment.
Background
A large number of frequency converters are needed to drive motors used in various scenes in cigarette equipment, so that the failure rate of the frequency converters used by cigarette enterprises in a large number is relatively high, and when the frequency converters have failures, the frequency converters can be directly related to the running conditions of the corresponding equipment motors.
At present, in practical application, the problem that the motor on the corresponding cigarette equipment cannot stop running in time due to frequency converter faults occurs frequently, and through analysis, the passage between the output end of the frequency converter and the motor cannot be reliably disconnected after the frequency converter faults.
Disclosure of Invention
In view of the above, the present invention aims to provide a redundant self-locking driving control device for a frequency converter of a cigarette equipment, so as to solve the problem that the power of the motor of the cigarette equipment cannot be reliably cut off.
The technical scheme adopted by the invention is as follows:
a redundant auto-lock drive control device for cigarette equipment converter includes: the driving control device comprises a frequency converter and a first relay, wherein a coil of the first relay is connected with an operation signal source, and a first normally open switch and a second normally open switch of the first relay are respectively connected with the frequency converter and used for providing an activation command signal and an enabling signal for the frequency converter;
the power contact of the contactor is connected between the output end of the frequency converter and the motor;
the coil of the second relay is connected with the frequency converter;
the coil of the time relay is connected with the operation signal source and is connected with the coil of the first relay in parallel, and the time relay is used for providing cut-off timing;
two ends of a third normally open switch of the first relay are respectively connected with a power supply source and a coil of the contactor;
the normally open switch of second relay and the normally open switch of time relay establishes ties for cutting off the circuit, cut off the circuit both ends respectively with the power supply and the coil connection of contactor, just the third normally open switch of first relay with it is parallelly connected to cut off the circuit.
In at least one possible implementation manner, the normally open switch of the contactor is arranged in the cut-off line and is connected in series with the normally open switch of the second relay and the normally open switch of the time relay.
In at least one possible implementation, the time relay is a time delay off time relay.
In at least one possible implementation manner, the contactor, the second relay and the time relay are all 24V direct current devices.
In at least one possible implementation thereof, the power supply is a 24VDC power supply.
In at least one possible implementation manner, the breaking performance of the power contact of the contactor is matched with the power of the motor.
In at least one possible implementation thereof, the motor is a three-phase alternating current motor.
In at least one possible implementation manner, two ends of the coil of the second relay are respectively connected with the current detection terminals of the frequency converter.
In at least one possible implementation thereof, the frequency converter has a minimum speed setting function.
The main design concept of the invention is that an output cut-off mechanism is provided for a frequency converter by a second relay, a contactor and a time relay in cooperation with a first relay, specifically, the contactor is connected between the frequency converter and a motor, a coil of the second relay is connected with the frequency converter, a coil of the time relay is connected with a coil of the first relay in parallel to form an operation signal source, a specific normally open switch of the first relay is respectively connected with a power supply source and the coil of the contactor, and the normally open switch of the second relay and the time relay are connected in series and then connected with the specific normally open switch of the first relay in parallel to form a cut-off circuit with a self-locking mechanism. The invention can ensure the safe and reliable disconnection of the contactor and also has the function of prolonging the service life of the contactor, thereby safely and reliably cutting off the passage between the motor and the frequency converter in a specific scene, and particularly, the precise and reliable disconnection of the driving circuit of the frequency converter and the motor can be ensured by the safe redundant design of the time relay and the second relay.
Drawings
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described with reference to the accompanying drawings, in which:
fig. 1 is a first schematic diagram of a redundant self-locking drive control device for a frequency converter of cigarette equipment according to an embodiment of the present invention;
fig. 2 is a schematic diagram two of a redundant self-locking drive control device for a frequency converter of cigarette equipment according to an embodiment of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative only and should not be construed as limiting the invention.
The invention provides an embodiment of a redundant self-locking driving control device for a frequency converter of cigarette equipment, which is specifically shown in figures 1 and 2 and comprises the following components: the frequency converter comprises a frequency converter 100 and a first relay K1, wherein a coil of the first relay K1 is connected with an operation signal source, a first normally open switch and a second normally open switch of the first relay K1 are respectively connected with the frequency converter 100 and used for providing an activation command signal and an enabling signal for the frequency converter 100, and the frequency converter further comprises a second relay K3, a contactor K2 and a time relay K4;
the power contact of the contactor K2 is connected between the output end of the frequency converter 100 and the motor;
the coil of the second relay K3 is connected with the frequency converter 100, and the second relay K3 is used for detecting the output current of the frequency converter 100;
the coil of the time relay K4 is connected with the operation signal source and is connected with the coil of the first relay K1 in parallel, and the time relay K4 is used for providing cut-off timing;
two ends of a third normally open switch of the first relay K1 are respectively connected with a power supply and a coil of the contactor K2;
the normally open switch of second relay K3 and the normally open switch of time relay K4 establishes ties for cutting off the circuit, the both ends of cutting off the circuit respectively with the power supply and contactor K2's coil connection, just the third of first relay K1 normally open switch with it is parallelly connected to cut off the circuit.
Further, the normally open switch of the contactor K2 is provided in the cut-off line, and is connected in series with the normally open switch of the second relay K3 and the normally open switch of the time relay K4.
Further, the time relay K4 is a time delay off time relay.
Further, the contactor K2, the second relay K3 and the time relay K4 are all 24V dc devices, and it is understood that the first relay K1 is also a 24V dc relay.
Further, the power supply is a 24VDC power supply, such as a switching power supply or the like.
Further, when the type is selected, the breaking performance of the power contact of the contactor K2 is matched with the power of the motor.
Further, both ends of the coil of the second relay K3 are connected to current detection terminals of the inverter 100, respectively.
Further, the frequency converter 100 has a lowest speed (lowest output frequency, related to the current sensed by K3) setting function.
Further, the motor is a three-phase alternating current motor.
The working principle of the invention is here schematically described in connection with the embodiments mentioned before:
(1) when the operating signal source is at a high level (24VDC), the coil K1 is electrified, the third normally-open switch is closed to electrify the coil K2, the normally-open power contact K2 is closed to connect the output end of the frequency converter 100 and a passage of the motor, and the motor is in a driving state; at this time, the first and second normally open switches of K1 are also closed to provide command signals and enable signals for the frequency converter 100, and at this time, the motor can operate at a speed required by the process, and it can be stated that the difference in the operation time of the normally open switches of K1 is less than 30ms, which can be understood as being closed and opened simultaneously.
Because the lowest speed output by the frequency converter 100 can be manually set to be greater than 0 (such as 0.2-0.5 HZ, namely the minimum current in the process that the frequency converter 100 is controlled to drive the motor is not 0), the coil of the K3 can be electrified, the normally open switch of the K3 is closed, meanwhile, the K4 coil is electrified by the running signal source, the normally open switch of the K4 coil can be closed, two main normally open switches (from the K3 and the K4) in the cut-off line are both closed, so that the 24VDC power supply supplies power to the K2 coil through the cut-off line and the third normally open switch of the K1 at the moment, and circuit self-locking is realized.
(2) When the operating signal source is at a low level, the coil of the K1 is powered off, and the set time T of the K4 starts to be timed (the invention does not limit the setting of the delay time T, but can consider the time required by combining with an actual scene, and set the value of T to be greater than the time for the frequency converter 100 to brake from the preset highest speed to the zero speed, for example, 5 to 15S); the normally open switches of K1 are turned off simultaneously, the frequency converter 100 is in a state without control signal input, and after the third normally open switch of K1 is turned off, the self-locking circuit (namely the cut-off circuit) of the contactor K2 is in an unlocking state;
with the speed reduction of the motor controlled by the frequency converter 100, when the output current of the frequency converter 100 is zero, the K3 coil loses power, the normally open switch of the K3 in a cut-off circuit is disconnected, the K2 coil loses power, and the normally open power contact is disconnected, so that the electric path between the frequency converter 100 and the motor is cut off; if some faults occur, the output current of the frequency converter 100 is not 0, or the K3 has faults, and the normally open switch of the K3 cannot be switched off, after the set time T of the K4 is reached, the normally open switch of the K4 in the cut-off line is switched off, the power supply of the K2 coil can be switched off, the possibility that the motor is driven by the frequency converter 100 is ensured, and therefore safety redundancy is added to the whole motor driving circuit.
In summary, the main design concept of the present invention is that the second relay, the contactor, and the time relay cooperate with the first relay to provide an output cut-off mechanism for the frequency converter, specifically, the contactor is connected between the frequency converter and the motor, the second relay coil is connected with the frequency converter, the time relay coil is connected in parallel with the first relay coil to connect an operation signal source, the specific normally open switch of the first relay is connected with the power supply and the contactor coil, respectively, and the normally open switch of the second relay and the time relay is connected in series and then connected in parallel with the specific normally open switch of the first relay to form a cut-off circuit with a self-locking mechanism. The invention can ensure the safe and reliable disconnection of the contactor and also has the function of prolonging the service life of the contactor, thereby safely and reliably cutting off the passage between the motor and the frequency converter in a specific scene, and particularly, the precise and reliable disconnection of the driving circuit of the frequency converter and the motor can be ensured by the safe redundant design of the time relay and the second relay.
In the embodiments of the present invention, "at least one" means one or more, "a plurality" means two or more. "and/or" describes the association relationship of the associated objects, and means that there may be three relationships, for example, a and/or B, and may mean that a exists alone, a and B exist simultaneously, and B exists alone. Wherein A and B can be singular or plural. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship. "at least one of the following" and similar expressions refer to any combination of these items, including any combination of singular or plural items. For example, at least one of a, b, and c may represent: a, b, c, a and b, a and c, b and c or a and b and c, wherein a, b and c can be single or multiple.
The structure, features and effects of the present invention have been described in detail with reference to the embodiments shown in the drawings, but the above embodiments are merely preferred embodiments of the present invention, and it should be understood that technical features related to the above embodiments and preferred modes thereof can be reasonably combined and configured into various equivalent schemes by those skilled in the art without departing from and changing the design idea and technical effects of the present invention; therefore, the invention is not limited to the embodiments shown in the drawings, and all the modifications and equivalent embodiments that can be made according to the idea of the invention are within the scope of the invention as long as they are not beyond the spirit of the description and the drawings.
Claims (9)
1. A redundant auto-lock drive control device for cigarette equipment converter includes: the driving control device comprises a frequency converter and a first relay, wherein a coil of the first relay is connected with an operation signal source, and a first normally open switch and a second normally open switch of the first relay are respectively connected with the frequency converter and used for providing an activation command signal and an enabling signal for the frequency converter;
the power contact of the contactor is connected between the output end of the frequency converter and the motor;
the coil of the second relay is connected with the frequency converter;
the coil of the time relay is connected with the operation signal source and is connected with the coil of the first relay in parallel, and the time relay is used for providing cut-off timing;
two ends of a third normally open switch of the first relay are respectively connected with a power supply source and a coil of the contactor;
the normally open switch of second relay and the normally open switch of time relay establishes ties for cutting off the circuit, cut off the circuit both ends respectively with the power supply and the coil connection of contactor, just the third normally open switch of first relay with it is parallelly connected to cut off the circuit.
2. The redundant self-locking drive control device for the cigarette equipment frequency converter according to claim 1, wherein a normally open switch of the contactor is arranged in the cut-off line and is connected in series with a normally open switch of the second relay and a normally open switch of the time relay.
3. The redundant self-locking drive control device for a cigarette making equipment frequency converter according to claim 1, wherein the time relay is a time delay off time relay.
4. The redundant self-locking drive control device for the frequency converter of cigarette equipment according to claim 1, wherein the contactor, the second relay and the time relay are all 24V dc devices.
5. The redundant self-locking drive control device for a cigarette making equipment frequency converter according to claim 4, wherein the power supply is a 24VDC power supply.
6. The redundant self-locking drive control device for the frequency converter of cigarette equipment according to claim 1, wherein the breaking performance of the power contact of the contactor is matched with the power of the motor.
7. The redundant self-locking drive control device for a cigarette making equipment frequency converter according to claim 6, wherein the motor is a three-phase alternating current motor.
8. The redundant self-locking drive control device for the frequency converter of cigarette equipment according to claim 1, wherein two ends of the coil of the second relay are respectively connected with the current detection terminals of the frequency converter.
9. The redundant self-locking drive control device for the frequency converter of the cigarette equipment according to any one of claims 1 to 8, wherein the frequency converter has a minimum speed setting function.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111512793.1A CN114389513A (en) | 2021-12-11 | 2021-12-11 | Redundant self-locking driving control device for frequency converter of cigarette equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111512793.1A CN114389513A (en) | 2021-12-11 | 2021-12-11 | Redundant self-locking driving control device for frequency converter of cigarette equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114389513A true CN114389513A (en) | 2022-04-22 |
Family
ID=81196454
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111512793.1A Pending CN114389513A (en) | 2021-12-11 | 2021-12-11 | Redundant self-locking driving control device for frequency converter of cigarette equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114389513A (en) |
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2021
- 2021-12-11 CN CN202111512793.1A patent/CN114389513A/en active Pending
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