CN203377821U - Soft starting device of extra large motor - Google Patents
Soft starting device of extra large motor Download PDFInfo
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- CN203377821U CN203377821U CN201320378490.XU CN201320378490U CN203377821U CN 203377821 U CN203377821 U CN 203377821U CN 201320378490 U CN201320378490 U CN 201320378490U CN 203377821 U CN203377821 U CN 203377821U
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Abstract
The utility model provides a soft starting device of an extra large motor, which belongs to the technical field of electromechanical control. The soft starting device solves the problem that in the prior art, when the short-circuit capacity of a low voltage power network of the extra large motor is small or under the condition that the generator capacity is less than 1.5 times the motor capacity, the motor cannot be smoothly started. The soft starting device of the extra large motor comprises a frequency converter which controls the rotation speed and the torque of the motor, a contactor, a fuse, a reactor and a controller which realizes power frequency synchronous switch. The input end of the controller is connected with a touch screen which is used for motor parameter manual input. The output end of the controller is connected with the frequency converter. The frequency converter is connected with the motor. The soft starting device of the extra large motor can automatically adjust the output frequency and the voltage, so that the extra large motor can be stably and reliably started.
Description
Technical field
The utility model belongs to the Electromechanical Control technical field, relates to a kind of soft starter device of super-huge motor.
Background technology
Because the electric current in super-huge motor starting procedure is excessive, low voltage electric network is caused to great impact, cause significantly bus pressure drop, easily affect other electric equipments and normally move, also easily burn out equipment, therefore in actual the use, all need by soft start.The soft start regulation voltage slowly rises to rated voltage by zero, make motor in starting process, by uncontrollable the becoming of past overload impact electric current, can be controlled, and can regulate as required the size of starting current, making gradually to be carried in voltage on motor increases under rated voltage and works, soft start makes electric motor starting level and smooth, does not have impact torque in overall process.
And the soft start of motor at present all relies on soft starter to regulate starting voltage; soft starter be the soft start of a kind of current collection machine, soft stop, multi-protective function in the novel motor control assembly of one, its main composition is three-phase anti-parallel thyristor and the electronic control circuit thereof be serially connected with between power supply and controlled motor.Use diverse ways, control the angle of flow of three-phase anti-parallel thyristor, the input voltage of controlled motor is changed by the difference requirement, thereby realize the function of soft start.
But in actual use, on the one hand because the pressure regulation span of super-huge motor is larger, load is large, and the immediate current of generation is still larger, manually regulates and tend to cause the adjusting span excessive, make immediate current excessive and puncture the components and parts in soft starter.On the other hand, when the low voltage electric network capacity of short circuit at super-huge motor place very little, or under 1.5 times of conditions of generator capacity lower than motor capacity, the excessive still starting motor smoothly of the pressure drop that conventional soft start causes.
Summary of the invention
The problems referred to above that the utility model exists for prior art, proposed a kind of soft starter device of super-huge motor, and this soft starter device is regulation output voltage and output frequency automatically, more steadily, starting large motor reliably.
The utility model is realized by following technical proposal: a kind of soft starter device of super-huge motor, the frequency converter that comprises motor and control motor speed and torque, it is characterized in that, the soft starter device of this super-huge motor also comprises contactor, fuse, reactor and the controller of realizing the synchronous switching of power frequency, described contactor, fuse, reactor, controller and frequency converter are connected to form control loop, the input of described controller connects for manually inputting the touch-screen of motor parameter, the output of described controller is connected with frequency converter, described frequency converter is connected with motor.
Manually, by the parameter of threephase motor input touch-screen, touch-screen is exported to controller and frequency converter by parameter.In starting process, the software program of frequency converter inside carries out analytical calculation to these parameters, exports the voltage magnitude and the frequency that increase progressively gradually, thereby realizes the automatic adjusting of starting voltage and frequency, smooth start motor; Starting approaches while finishing, when the difference that voltage magnitude, frequency and the phase place of electrical network or generator and frequency converter output detected when controller is less than the synchronization settings value, automatic output control signal closes bypass contactor, disconnection frequency conversion input and output contactor, make motor in the power frequency operation state, and make frequency converter and power grid security isolation.This device can start more steadily, reliably super-huge motor under low voltage electric network capacity of short circuit or the very limited condition of generator capacity.
In the soft starter device of above-mentioned super-huge motor, described contactor, fuse, reactor, frequency converter and controller are arranged in frequency-conversion control cabinet, and described touch-screen is arranged on frequency-conversion control cabinet cabinet face.Touch-screen is arranged on frequency conversion tank, is convenient to input the parameter of motor.
In the soft starter device of above-mentioned super-huge motor, described motor is threephase motor, between the output of frequency converter and threephase motor, by reactor, is connected, and described reactor is current limiting reactor, the quantity of described fuse is three, is connected on the input of frequency converter.Frequency converter is protected by three fast acting fuses of input.
In the soft starter device of above-mentioned super-huge motor, described touch-screen is the condenser type liquid crystal touch screen.But condenser type liquid crystal touch screen multi-point touch, touch-control is effective, is convenient to control.
Compared with prior art, the soft starter device of this super-huge motor is by manually inputting the parameter of motor, and the software program by frequency converter inside calculates and control voltage magnitude and frequency that frequency converter is exported, make under low voltage electric network capacity of short circuit or the very limited condition of generator capacity and start more steadily, reliably super-huge motor.
The accompanying drawing explanation
Fig. 1 is circuit structure diagram of the present utility model.
Embodiment
Be below instantiation of the present utility model, and by reference to the accompanying drawings, the technical solution of the utility model be further described, but the utility model is not limited to these examples.
As shown in Figure 1, a kind of soft starter device of super-huge motor, comprise frequency converter, contactor, fuse, the current limiting reactor of controlling motor speed and torque, and realize the manual controller of the synchronous switching of power frequency, the input of controller connects the touch-screen that can manually input the threephase motor parameter, the output of controller is connected with frequency converter, and frequency converter is connected with threephase motor.Frequency converter and controller are arranged in frequency-conversion control cabinet, and touch-screen is arranged on the cabinet face.Also be connected with current limiting reactor between the output of frequency converter and threephase motor, frequency converter is protected by three fast acting fuses of input.Touch-screen is the condenser type liquid crystal touch screen.
Manually, by the parameter of threephase motor input touch-screen, touch-screen is exported to controller and frequency converter by parameter.In starting process, the software program of frequency converter inside carries out analytical calculation to these parameters, exports the voltage magnitude and the frequency that increase progressively gradually, thereby realizes the automatic adjusting of starting voltage and frequency, smooth start motor; Starting approaches while finishing, when the difference that receives voltage magnitude, frequency and the phase place of electrical network or generator and frequency converter output when controller is less than the synchronization settings value, automatic output control signal closes bypass contactor, disconnection frequency conversion input and output contactor, make motor in the power frequency operation state, and make frequency converter and power grid security isolation.Protect fast the elements such as frequency converter and controller by fuse, carry out in the limits synchronization handoff procedure the large electric current that frequency converter is caused by current limiting reactor.This device can start more steadily, reliably super-huge motor under low voltage electric network capacity of short circuit or the very limited condition of generator capacity.
Claims (4)
1. the soft starter device of a super-huge motor, the frequency converter that comprises motor and control motor speed and torque, it is characterized in that, the soft starter device of this super-huge motor also comprises contactor, fuse, reactor and realizes the controller of the synchronous switching of power frequency, described contactor, fuse, reactor, controller and frequency converter are connected to form control loop, the input of described controller connects for manually inputting the touch-screen of motor parameter, the output of described controller is connected with frequency converter, and described frequency converter is connected with motor.
2. the soft starter device of super-huge motor according to claim 1, is characterized in that, described contactor, fuse, reactor, frequency converter and controller are arranged in frequency-conversion control cabinet, and described touch-screen is arranged on frequency-conversion control cabinet cabinet face.
3. the soft starter device of super-huge motor according to claim 1, it is characterized in that, described motor is threephase motor, between the output of frequency converter and threephase motor, by reactor, be connected, described reactor is current limiting reactor, the quantity of described fuse is three, is connected on the input of frequency converter.
4. the soft starter device of super-huge motor according to claim 1 and 2, is characterized in that, described touch-screen is the condenser type liquid crystal touch screen.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320378490.XU CN203377821U (en) | 2013-06-26 | 2013-06-26 | Soft starting device of extra large motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320378490.XU CN203377821U (en) | 2013-06-26 | 2013-06-26 | Soft starting device of extra large motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203377821U true CN203377821U (en) | 2014-01-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320378490.XU Expired - Lifetime CN203377821U (en) | 2013-06-26 | 2013-06-26 | Soft starting device of extra large motor |
Country Status (1)
| Country | Link |
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| CN (1) | CN203377821U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107296288A (en) * | 2017-06-29 | 2017-10-27 | 仲恺农业工程学院 | Continuous potato cleaning and peeling all-in-one machine |
| CN109713943A (en) * | 2019-03-12 | 2019-05-03 | 浙江汇迅骏机电技术有限公司 | A kind of time variant voltage electric motor starting method |
-
2013
- 2013-06-26 CN CN201320378490.XU patent/CN203377821U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107296288A (en) * | 2017-06-29 | 2017-10-27 | 仲恺农业工程学院 | Continuous potato cleaning and peeling all-in-one machine |
| CN107296288B (en) * | 2017-06-29 | 2023-10-27 | 仲恺农业工程学院 | Continuous potato cleaning and peeling integrated machine |
| CN109713943A (en) * | 2019-03-12 | 2019-05-03 | 浙江汇迅骏机电技术有限公司 | A kind of time variant voltage electric motor starting method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP03 | Change of name, title or address |
Address after: 311199, No. 159 North East Lake Road, East Lake street, Yuhang District, Zhejiang, Hangzhou Patentee after: HANGZHOU FORTUNE CRYOGENIC EQUIPMENT CO.,LTD. Address before: 311425, No. 159 North East Lake Road, East Lake street, Yuhang District, Zhejiang, Hangzhou Patentee before: Hangzhou Fortune Industry Group Co.,Ltd. |
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| CX01 | Expiry of patent term |
Granted publication date: 20140101 |
|
| CX01 | Expiry of patent term |