CN217282761U - Drive circuit of grinding powder line motor - Google Patents
Drive circuit of grinding powder line motor Download PDFInfo
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- CN217282761U CN217282761U CN202220451876.8U CN202220451876U CN217282761U CN 217282761 U CN217282761 U CN 217282761U CN 202220451876 U CN202220451876 U CN 202220451876U CN 217282761 U CN217282761 U CN 217282761U
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Abstract
The utility model discloses a grinding wire motor driving circuit, which comprises a grinding motor, a frequency converter and a frequency converter switch; the three-phase live wire connects the motor for the crocus after concatenating converter switch, converter in proper order, and this converter is connected with the remote control signal line in order to realize the remote control of converter, and this branch road of motor place for the crocus all links to each other with the neutral conductor in order to constitute the working circuit of branch road of motor place for the crocus. It has the following advantages: when the frequency converter fails, the frequency converter can be powered off, the frequency converter cannot be damaged, and data of the frequency converter can be protected from being lost so as to conveniently troubleshoot the frequency converter; the total occupied space of the motor driving circuit is reduced, abnormal motor operation can not occur due to loosening of the thermal relay during operation, and the probability of faults is reduced.
Description
Technical Field
The utility model relates to a motor drive circuit especially relates to a motor drive circuit who relates to on crocus line.
Background
The mill, as its name implies, grinds the raw materials into a powder. According to the requirements of orders and formulas, some granular engineering plastic particles are ground into powder, the raw materials are sucked into a storage tank by a suction machine to be ground in cooperation with the production of some raw materials, and fine powder is sieved out by a vibrating screen.
The grinding production line needs a plurality of motors to work coordinately, the motor drive is often switched and started by adopting star-triangle connection, the driving mode has the defects that the output torque cannot be changed, when jamming or abnormality occurs, the motor winding is burnt out, and each time the motor winding is sent out for maintenance, the cost and the time are high, and the production is delayed. In the prior art, as shown in fig. 1, a circuit breaker 201 is mostly used for driving and controlling a motor, the circuit breaker 201 is connected in series with a contactor 202 and then connected in series with a thermal relay 203, and a frequency converter 204 is further used for controlling the motor 205, which is a relatively mature control mode in the market at present. The control of current converter is that control the converter with the contactor, presses outside stop button promptly, and the contactor disconnection, the converter outage, and control is favourable also has the disadvantage like this, and the advantage is that the converter breaks down, can break off the converter power immediately, and the disadvantage is that the converter breaks down, and the contactor jumps out of order, is unfavorable for looking for the trouble of converter, and the in-process of converter operation moreover, if the direct control power comes the shutdown, also big to converter self harm during the charge-discharge.
SUMMERY OF THE UTILITY MODEL
The utility model provides a crocus line motor drive circuit, it has overcome in the background art not enough of prior art.
The utility model provides a technical scheme that its technical problem adopted is:
the grinding powder wire motor driving circuit comprises a grinding powder motor, a frequency converter and a frequency converter switch; three-phase live wire connects the motor for the crocus after concatenating converter switch, converter in proper order, and this converter is connected with the remote control signal line in order to realize the remote control of converter, and this branch road of motor place for the crocus all links to each other with the neutral conductor in order to constitute the working circuit of branch road of motor place for the crocus.
In one embodiment: the branch where the motor for grinding is located is connected with a buck converter, the buck converter is connected with a frequency converter to provide a signal power supply for the frequency converter, and a first circuit breaker is connected in series between the buck converter and a three-phase incoming line of the branch where the motor for grinding is located.
In one embodiment: the first motor, the first motor protection circuit breaker and the first contactor are also included; the three-phase live wire is connected with a first motor after being sequentially connected with a first motor protection circuit breaker and a first contactor in series, a branch where the first motor is located is connected with a neutral wire to form a working circuit of the branch where the first motor is located, and the first motor is any one of motors for a draught fan, a fan shutting-off machine and a vibrating screen.
In one embodiment: and a second circuit breaker is connected in series on a line where the branch where the first motor is located is connected with the neutral line.
In one embodiment: the device also comprises an induced draft fan, a wind closing fan, a motor for the vibrating screen, a first motor protection circuit breaker, a first contactor, a second motor protection circuit breaker, a second contactor, a third motor protection circuit breaker and a third contactor; the three-phase live wire is connected with an induced draft fan after being sequentially connected in series with a first motor protection circuit breaker and a first contactor, and a branch where the induced draft fan is located is connected with a neutral wire to form a working circuit of the branch where the induced draft fan is located; the three-phase live wire is connected with a wind-off machine after being sequentially connected in series with a second motor protection circuit breaker and a second contactor, and a branch where the wind-off machine is located is connected with a neutral wire to form a working circuit of the branch where the wind-off machine is located; the three-phase live wire is connected with the motor for the vibrating screen after being sequentially connected with the third motor protection circuit breaker and the third contactor in series, and a branch where the motor for the vibrating screen is located is connected with the neutral wire to form a working circuit of the branch where the motor for the vibrating screen is located.
In one embodiment: a third circuit breaker is connected in series on a line connected with a neutral line and a branch where the induced draft fan is located; a third circuit breaker is connected in series on a line connected with a neutral line of a branch where the air shutoff machine is located; a third circuit breaker is connected in series on a line connecting a branch where a motor is located and a neutral line.
Compared with the background technology, the technical scheme has the following advantages:
the frequency converter adopts remote control and local control's mode to control the frequency converter operation, breaks down when the frequency converter, and the frequency converter can not cut off the power supply, can not produce the damage to the frequency converter, can protect the frequency converter data again moreover and not lose in order to conveniently carry out troubleshooting to the frequency converter. The motor protection circuit breaker is adopted to replace a circuit breaker and a thermal relay (the motor protection circuit breaker integrates the functions of the circuit breaker and the thermal relay), the total occupied space of a motor driving circuit is reduced, the abnormal operation of the motor can not occur due to the loosening of the thermal relay during operation, and the probability of faults is reduced.
Drawings
The present invention will be further described with reference to the accompanying drawings and examples.
Fig. 1 is a circuit diagram of a conventional grinding line motor as described in the background art.
Fig. 2 is a circuit diagram of a grinding line motor driving circuit according to the present disclosure.
Detailed Description
Embodiment one, as shown in fig. 2:
a grinding powder wire motor driving circuit which comprises a grinding powder motor 11, a frequency converter 12 and a frequency converter switch 13; three-phase live wire connects the motor for the crocus after concatenating converter switch 13, converter 12 in proper order, and this converter 12 is connected in order to realize the remote control of converter with remote control signal line 100, and this branch road that motor 11 is located for the crocus all links to each other with the neutral conductor in order to constitute the working circuit of the branch road that motor 11 is located for the crocus. The branch of the motor 11 for grinding is connected with a buck converter 10, the buck converter 10 is connected with a frequency converter 12 to provide signal power for the frequency converter 12, and a first circuit breaker 14 is connected in series between the buck converter 10 and the three-phase incoming line of the branch of the motor 11 for grinding. In this embodiment, the buck converter is a 220V to 24V power converter, which is used as a signal power supply for a frequency converter, the frequency converter needs 24V voltage to trigger, once the buck converter fails to cause a short circuit, the first circuit breaker 14 at the upper end can cut off the power supply in time, so as to prevent the current from reversely puncturing a circuit board at the control end of the frequency converter, thereby playing a role in protection.
Example two:
on the basis of the first embodiment, the grinding line motor driving circuit further comprises a first motor, a first motor protection circuit breaker and a first contactor; the three-phase live wire is connected with a first motor after being sequentially connected with a first motor protection circuit breaker and a first contactor in series, a branch where the first motor is located is connected with a neutral wire to form a working circuit of the branch where the first motor is located, and the first motor is any one of motors for a draught fan, a fan shutting-off machine and a vibrating screen. And a second circuit breaker is connected in series on a line where the branch where the first motor is located is connected with the neutral line.
Example three, as in fig. 2:
on the basis of the first embodiment, the grinding line motor driving circuit further comprises an induced draft fan 21, a wind closing fan 31, a motor 41 for a vibrating screen, a first motor protection breaker 22, a first contactor 23, a second motor protection breaker 32, a second contactor 33, a third motor protection breaker 42 and a third contactor 43; the three-phase live wire is connected with an induced draft fan 21 after being sequentially connected in series with a first motor protection circuit breaker 22 and a first contactor 23, and a branch where the induced draft fan 21 is located is connected with a neutral wire to form a working circuit of the branch where the induced draft fan 21 is located; the three-phase live wire is connected with a fan shut-off machine 31 after being sequentially connected in series with a second motor protection circuit breaker 32 and a second contactor 33, and a branch where the fan shut-off machine 31 is located is connected with a neutral wire to form a working circuit of the branch where the fan shut-off machine 31 is located; the three-phase live wire is connected with the motor 41 for the vibrating screen after being sequentially connected with the third motor protection circuit breaker 42 and the third contactor 43 in series, and the branch where the motor 41 for the vibrating screen is located is connected with the neutral wire to form a working circuit of the branch where the motor 41 for the vibrating screen is located.
A third circuit breaker 24 is connected in series on a line connected with a neutral line and a branch where the induced draft fan 21 is located; a third circuit breaker 34 is connected in series on a line connecting a branch where the air shutoff valve 31 is positioned and a neutral line; a third breaker 44 is connected in series to a line connecting a branch of the motor 41 for the shaker to a neutral line.
The motor protection circuit breaker is used for protecting a motor, and the purpose of the motor protection circuit breaker is that the motor is started and disconnected during operation infrequently and can be protected (automatically cut off a circuit) when a fault such as short circuit and undervoltage occurs in the motor, wherein the rated current is 630A or less (namely, the protected motor is 315kW or less).
The first contactor 23, the second contactor 33, and the third contactor 43 connected to the corresponding motors are specifically contacts of the first contactor 23, contacts of the second contactor 33, and contacts of the third contactor 43, which are respectively connected to the corresponding motors.
The present case has overcome easy damage of converter, the converter trouble of being not convenient for look for among the present crocus line motor drive circuit through the improvement to present crocus line motor drive circuit to and easily because of the thermal relay pine takes off the defect that leads to the unable normal work of motor.
The foregoing is only a preferred embodiment of the present invention, and therefore the scope of the invention should not be limited by this, and the equivalent changes and modifications made in the claims and the description should be considered within the scope of the present invention.
Claims (6)
1. Grinding line motor drive circuit, its characterized in that: comprises a motor for grinding, a frequency converter and a frequency converter switch; the three-phase live wire connects the motor for the crocus after concatenating converter switch, converter in proper order, and this converter is connected with the remote control signal line in order to realize the remote control of converter, and this branch road of motor place for the crocus all links to each other with the neutral conductor in order to constitute the working circuit of branch road of motor place for the crocus.
2. The pulverizer wire motor drive circuit according to claim 1, wherein: this branch road at motor place for the crocus is connected with a step-down converter, and this step-down converter connects the converter and provides signal power for the converter, has concatenated first circuit breaker between the three-phase inlet wire of this step-down converter and crocus motor place branch road.
3. The pulverizer wire motor drive circuit according to claim 1, wherein: the first motor, the first motor protection circuit breaker and the first contactor are also included; the three-phase live wire is connected with a first motor after being sequentially connected with a first motor protection circuit breaker and a first contactor in series, a branch where the first motor is located is connected with a neutral wire to form a working circuit of the branch where the first motor is located, and the first motor is any one of motors for a draught fan, a fan shutting-off machine and a vibrating screen.
4. The mill line motor drive circuit according to claim 3, characterized in that: and a second circuit breaker is connected in series on a line where the branch where the first motor is located is connected with the neutral line.
5. The pulverizer wire motor drive circuit according to claim 1, wherein: the device also comprises an induced draft fan, a wind closing machine, a motor for the vibrating screen, a first motor protection circuit breaker, a first contactor, a second motor protection circuit breaker, a second contactor, a third motor protection circuit breaker and a third contactor; the three-phase live wire is connected with an induced draft fan after being sequentially connected in series with a first motor protection circuit breaker and a first contactor, and a branch where the induced draft fan is located is connected with a neutral wire to form a working circuit of the branch where the induced draft fan is located; the three-phase live wire is connected with a wind-off machine after being sequentially connected in series with a second motor protection circuit breaker and a second contactor, and a branch where the wind-off machine is located is connected with a neutral wire to form a working circuit of the branch where the wind-off machine is located; and the three-phase live wire is connected with a motor for the vibrating screen after being sequentially connected with a third motor protection circuit breaker and a third contactor in series, and a branch where the motor for the vibrating screen is located is connected with the neutral wire to form a working circuit of the branch where the motor for the vibrating screen is located.
6. The pulverizer wire motor drive circuit of claim 5, wherein: a third circuit breaker is connected in series on a line connected with a neutral line and a branch where the induced draft fan is located; a third circuit breaker is connected in series on a line connected with a neutral line of a branch where the air shutoff machine is located; and a third circuit breaker is connected in series on a line connecting a branch where the motor for the vibrating screen is located and a neutral line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220451876.8U CN217282761U (en) | 2022-03-02 | 2022-03-02 | Drive circuit of grinding powder line motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220451876.8U CN217282761U (en) | 2022-03-02 | 2022-03-02 | Drive circuit of grinding powder line motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217282761U true CN217282761U (en) | 2022-08-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220451876.8U Active CN217282761U (en) | 2022-03-02 | 2022-03-02 | Drive circuit of grinding powder line motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217282761U (en) |
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2022
- 2022-03-02 CN CN202220451876.8U patent/CN217282761U/en active Active
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