CN202818183U - Large-and-medium sized middle-and-low voltage motor starting circuit, device and motor - Google Patents
Large-and-medium sized middle-and-low voltage motor starting circuit, device and motor Download PDFInfo
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- CN202818183U CN202818183U CN2012204462769U CN201220446276U CN202818183U CN 202818183 U CN202818183 U CN 202818183U CN 2012204462769 U CN2012204462769 U CN 2012204462769U CN 201220446276 U CN201220446276 U CN 201220446276U CN 202818183 U CN202818183 U CN 202818183U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/30—Reactive power compensation
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P80/00—Climate change mitigation technologies for sector-wide applications
- Y02P80/10—Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier
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Abstract
The present utility model relates to the motor field and provides a large-and-medium sized middle-and-low voltage motor starting circuit. In the large-and-medium sized middle-and-low voltage motor starting circuit, a controller is used for controlling current-limiting and compensation circuit work according to current signals of a motor three-phase line detected by a current detection circuit, thus starting current of a motor and starting power factor of a compensation motor can be reduced. By adopting a device and a motor of the large-and-medium sized middle-and-low voltage motor starting circuit, problems of small starting moment, long starting time, low power factor, severe electrical network pollution and high costs caused when the motor is started can be effectively solved, and dual effects of electrical network cleaning and energy saving can be realized.
Description
Technical field
The utility model relates to electric motors, relates in particular to motor start-up compensating circuit, device and motor.
Background technology
Big-and-middle-sized, mesolow motor is when starting; usually can produce 5-7 starting current doubly; thereby electrical network is impacted and cause the decline of line voltage, also affect the use of other equipment when serious, and power factor low especially (generally about 0.2 ~ 0.4).At present, for reducing the starting current of motor, the general starting method that adopts has: resistance starting, reactor reduced-voltage starting, autotransformer reduced-voltage starting, star/triangle conversion startup, bidirectional triode thyristor reduced-voltage starting, variable frequency starting, soft initiator startup etc.Wherein, resistance starting, reactor reduced-voltage starting, autotransformer reduced-voltage starting, star/triangle conversion start, and during startup, can reduce motor start-up moment, prolong start-up time; The bidirectional triode thyristor reduced-voltage starting can produce triple-frequency harmonics, causes electric network pollution, and variable frequency starting, soft initiator start then cost height, and be economical not.Therefore, the motor starter that provides in the prior art exists that staring torque reduces, prolong start-up time, power factor is low, cause electric network pollution and high in cost of production problem when actuating motor.
The utility model content
The purpose of this utility model is to provide a kind of motor compensating circuit and motor, be intended to solve the motor starter that provides in the prior art when actuating motor, have that staring torque reduces, prolong start-up time, power factor is low, cause electric network pollution and high in cost of production problem.
For this reason, the utility model is by the following technical solutions:
A kind of big-and-middle-sized, mesolow motor start-up circuit comprises:
Input is connected with the power circuit of motor M, detects the current detection circuit of the operating current of motor M;
The power input of input termination motor M, current limliting, the compensating circuit of the power factor the when electric current when reducing motor M startup and compensated motor M start;
Input the output of the described current detection circuit of termination, export the control end of the described current limliting of termination, compensating circuit, control the controller of described current limliting, compensating circuit work according to the current signal of described current detection circuit output.
Described current detection circuit comprises:
Be connected respectively Current Transmit 1, Current Transmit 2, the Current Transmit 3 of A, the B of detection motor M, the electric current of C three-phase line with A, B, the C three-phase line of motor M;
Input connects respectively the output of described Current Transmit 1, Current Transmit 2, Current Transmit 3, the input of the described controller of output termination, the current signal that described Current Transmit 1, Current Transmit 2, Current Transmit 3 are detected converts the current signal change-over circuit that is suitable for described controller processing to.
Described current limliting, compensating circuit comprise:
Inductance L 1, capacitor C 1, inductance L 2, capacitor C 2, inductance L 3, capacitor C 3, linked switch K2;
The first end of the first end ground connection of described capacitor C 1, the described inductance L 1 of the second termination, the first end of the first end ground connection of described capacitor C 2, the described inductance L 2 of the second termination, the first end of the first end ground connection of described capacitor C 3, the described inductance L 3 of the second termination;
The second end of described inductance L 1, inductance L 2, inductance L 3 connects respectively A, B, the C three-phase line of described motor M by linked switch K2.
Also comprise:
Linked switch K1, linked switch K3;
Described linked switch K1 and described linked switch K3 are connected in series between motor M and the power supply;
The first end of described linked switch K2 is connected with the second end of described inductance L 1, inductance L 2, inductance L 3 respectively, the common port of the described linked switch K1 of the second end of described linked switch K2 and described linked switch K3;
Described linked switch K2 be connected the control end of linked switch K3 and all be connected with the output of described controller.
Also comprise:
Drive circuit;
The output of the described controller of input termination of described drive circuit, described drive circuit 5 outputs connect respectively the control end of described linked switch K2 and described linked switch K3.
Also comprise:
Described controller is connected with host computer, carries out 485 transducers of the described controller of remote operation by host computer.
A kind of big-and-middle-sized, mesolow motor starter comprises above-described big-and-middle-sized, mesolow motor start-up circuit.
A kind of big-and-middle-sized, mesolow motor is characterized in that, comprises above-described big-and-middle-sized, mesolow motor starter.
That the utility model provides is big-and-middle-sized, mesolow motor start-up circuit, device and motor, the current signal control current limliting of the motor three-phase line that controller detects according to current detection circuit, compensating circuit work, thereby the power factor the when electric current when reducing the startup of motor and compensated motor start.Therefore, solve the motor starter that provides in the prior art when actuating motor, have that staring torque reduces, prolong start-up time, power factor is low, cause electric network pollution and high in cost of production problem.
Description of drawings
The circuit theory diagrams of big-and-middle-sized, the mesolow motor start-up circuit that Fig. 1 provides for the utility model embodiment;
Phase current waveform figure when Fig. 2 is big-and-middle-sized, mesolow motor start-up.
Embodiment
For making the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with drawings and the specific embodiments the utility model is described in further detail.Should be appreciated that specific embodiment described herein, only be used for explaining the utility model, be not limited to the utility model.
Big-and-middle-sized, mesolow motor start-up circuit that the utility model provides, the current signal control current limliting of motor 1 three-phase line that controller 4 detects according to current detection circuit 3, compensating circuit 2 work, thereby the power factor the when electric current when reducing the startup of motor 1 and compensated motor start.
With reference to Fig. 1, the circuit theory diagrams that the utility model embodiment provides.
A kind of big-and-middle-sized, mesolow motor start-up circuit comprises: input is connected with the power circuit of motor M, detects the current detection circuit 2 of the operating current of motor M; The power input of input termination motor M, current limliting, the compensating circuit 1 of the power factor the when electric current when reducing motor M startup and compensated motor M start; The output of input termination current detection circuit 2, the control end of output termination current limliting, compensating circuit 1 is according to the current signal control current limliting of current detection circuit 2 outputs, the controller 3 of compensating circuit 1 work.
This current detection circuit 2 comprises: be connected respectively Current Transmit 1, Current Transmit 2, the Current Transmit 3 of A, the B of detection motor M, the electric current of C three-phase line with A, B, the C three-phase line of motor M; Input connects respectively the output of Current Transmit 1, Current Transmit 2, Current Transmit 3, the input of output termination controller 3, the current signal that Current Transmit 1, Current Transmit 2, Current Transmit 3 are detected converts the current signal change-over circuit 21 that is suitable for controller 3 processing to.
This current limliting, compensating circuit 1 comprise: inductance L 1, capacitor C 1, inductance L 2, capacitor C 2, inductance L 3, capacitor C 3, linked switch K2; The first end ground connection of capacitor C 1, the first end of the second termination inductance L 1, the first end ground connection of capacitor C 2, the first end of the second termination inductance L 2, the first end ground connection of capacitor C 3, the first end of the second termination inductance L 3; The second end of inductance L 1, inductance L 2, inductance L 3 connects respectively A, B, the C three-phase line of motor M by linked switch K2.
This is big-and-middle-sized, the mesolow motor start-up circuit, also comprises: linked switch K1, linked switch K3; Linked switch K1 and linked switch K3 are connected in series between motor M and the power supply 4; The first end of linked switch K2 is connected with the second end of inductance L 1, inductance L 2, inductance L 3 respectively, the second end linked switch K1 of linked switch K2 and the common port of linked switch K3; Linked switch K2 is connected control end and all is connected with the output of controller 3 with linked switch K3.
This is big-and-middle-sized, the mesolow motor start-up circuit, also comprises: drive circuit 5; The output of the input termination controller 3 of drive circuit 5, drive circuit 5 outputs connect respectively the control end of linked switch K2 and linked switch K3.
This is big-and-middle-sized, the mesolow motor start-up circuit, also comprises: controller 3 is connected with host computer 7, carries out 485 transducers 6 of remote operation controller 3 by host computer 7.
The utility model embodiment also provides a kind of big-and-middle-sized, mesolow motor starter that comprises big-and-middle-sized, mesolow motor start-up circuit as previously discussed.
The utility model embodiment also provides a kind of big-and-middle-sized, mesolow motor that comprises above-described big-and-middle-sized, mesolow motor starter.
The operation principle big-and-middle-sized, the mesolow motor start-up circuit that the utility model embodiment provides is as follows:
The knife switch of the linked switch K1 that provides among the utility model embodiment for adopting manual mode to operate, linked switch K2 and linked switch K3 are electromagnetic relay.
Under the state of linked switch K1 closure, controller 3 is closed by drive circuit 5 control linked switch K3, and big-and-middle-sized, mesolow motor M begins to start at this moment.Electric current when motor M starts on A, B, the C three-phase line is shown in Fig. 2 (phase current waveform figure during big-and-middle-sized, mesolow motor start-up).
The electric current that constantly detects arbitrary phase circuit of motor M when controller 3 in t1 surpasses the specified phase current (1.5I of 1.5 times of motor M
N) time, then closed by drive circuit 5 control linked switch K2, to connect current limliting, compensating circuit 1.This moment, current limliting, compensating circuit 1 were in parallel with motor M.Because current limliting, compensating circuit 1 are made of inductive element (inductance L 1, inductance L 2, inductance L 3) and capacitive element (capacitor C 1, capacitor C 2, capacitor C 3), this current limliting, compensating circuit 1 and after inductive load motor M is in parallel, to increase the reactance of integrated circuit, therefore reduced the electric current of integrated circuit.Capacitive element (capacitor C 1, capacitor C 2, capacitor C 3) is in parallel with inductive load motor M, can improve the power factor of inductive load motor M.Inductance L 1, inductance L 2, the inductance L 3 of connecting with capacitor C 1, capacitor C 2, capacitor C 3 respectively are because inductive element can protect capacitor C 1, capacitor C 2, capacitor C 3 to damage because electric current is excessive to the inhibition of alternating current.Therefore, this is big-and-middle-sized, the mesolow motor start-up circuit has reduced electric current when motor M starts and the power factor of compensated motor when starting.
Drive circuit 5 control linked switch K2 closures to be connecting after current limliting, the compensating circuit 1, and the phase current of controller 3 on the three-phase line that constantly detects motor M in t2 is all less than the specified phase current (1.5I of 1.5 times of motor M
N) time, then disconnect by drive circuit 5 control linked switch K2, to disconnect current limliting, compensating circuit 1.Current limliting, compensating circuit 1 are no longer worked with motor M at this moment.Motor M startup is finished.
This is big-and-middle-sized, in the mesolow motor start-up circuit:
1. the appearance value of the capacitive element in current limliting, the compensating circuit 1 (capacitor C 1, capacitor C 2, capacitor C 3) can be that this mathematical relationship of twice of the rated power of motor is determined by the reactive power of building-out capacitor generation.
2. this is big-and-middle-sized, the mesolow motor start-up circuit can also be in the controller 3 interior overcurrent protection values that arrange, in the running of motor M, and the phase current of Real-Time Monitoring motor M, and according to the overcurrent protection value of setting, motor M is carried out overcurrent protection.
3. this big-and-middle-sized, mesolow motor start-up circuit also can carry out remote operation by the host computer 7 that links to each other with controller, comprising:
Utilize host computer 7 remote activation motor M;
In the start-up course, on host computer 7, show in real time the waveform of starting current;
In the start-up course, the time that demonstration and record current limliting, compensating circuit 1 switch on and off is so that the operations staff analyzes and processes motor M system.
In sum, a kind of big-and-middle-sized, mesolow motor start-up circuit that the utility model embodiment provides, the current signal control current limliting of the motor M three-phase line that controller 3 detects according to current detection circuit 2, compensating circuit 1 work, thereby the power factor the when electric current when reducing the startup of motor M and compensated motor start.Adopt that this is big-and-middle-sized, the device of mesolow motor start-up circuit and motor, can effectively solve when actuating motor, have that staring torque reduces, prolong start-up time, power factor is low, cause electric network pollution and high in cost of production problem, reach cleaning electrical network and energy-conservation double effects.Particularly in the startup by the large and medium motor of diesel-electric set electric supply, can reduce the installed capacity of crossing of diesel generating set, thereby reduce equipment investment, save fuel oil, produce obvious economic benefit.
Claims (8)
1. one kind big-and-middle-sized, mesolow motor start-up circuit is characterized in that, comprising:
Input is connected with the power circuit of motor M, detects the current detection circuit (2) of the operating current of motor M;
The power input of input termination motor M, current limliting, the compensating circuit (1) of the power factor the when electric current when reducing motor M startup and compensated motor M start;
The output of the input described current detection circuit of termination (2), export the control end of the described current limliting of termination, compensating circuit (1), control the controller (3) of described current limliting, compensating circuit (1) work according to the current signal of described current detection circuit (2) output.
2. big-and-middle-sized, mesolow motor start-up circuit as claimed in claim 1 is characterized in that, described current detection circuit (2) comprising:
Be connected respectively Current Transmit 1, Current Transmit 2, the Current Transmit 3 of A, the B of detection motor M, the electric current of C three-phase line with A, B, the C three-phase line of motor M;
Input connects respectively the output of described Current Transmit 1, Current Transmit 2, Current Transmit 3, the input of the output described controller of termination (3), the current signal that described Current Transmit 1, Current Transmit 2, Current Transmit 3 are detected converts the current signal change-over circuit (21) that is suitable for described controller (3) processing to.
3. big-and-middle-sized, mesolow motor start-up circuit as claimed in claim 1 is characterized in that, described current limliting, compensating circuit (1) comprising:
Inductance L 1, capacitor C 1, inductance L 2, capacitor C 2, inductance L 3, capacitor C 3, linked switch K2;
The first end of the first end ground connection of described capacitor C 1, the described inductance L 1 of the second termination, the first end of the first end ground connection of described capacitor C 2, the described inductance L 2 of the second termination, the first end of the first end ground connection of described capacitor C 3, the described inductance L 3 of the second termination;
The second end of described inductance L 1, inductance L 2, inductance L 3 connects respectively A, B, the C three-phase line of described motor M by linked switch K2.
4. big-and-middle-sized, mesolow motor start-up circuit as claimed in claim 3 is characterized in that, also comprises:
Linked switch K1, linked switch K3;
Described linked switch K1 and described linked switch K3 are connected in series between motor M and the power supply (4);
The first end of described linked switch K2 is connected with the second end of described inductance L 1, inductance L 2, inductance L 3 respectively, the common port of the described linked switch K1 of the second end of described linked switch K2 and described linked switch K3;
Described linked switch K2 be connected the control end of linked switch K3 and all be connected with the output of described controller (3).
5. big-and-middle-sized, mesolow motor start-up circuit as claimed in claim 4 is characterized in that, also comprises:
Drive circuit (5);
The output of the described controller of input termination (3) of described drive circuit (5), described drive circuit 5 outputs connect respectively the control end of described linked switch K2 and described linked switch K3.
6. big-and-middle-sized, mesolow motor start-up circuit as claimed in claim 1 is characterized in that, also comprises:
Described controller (3) is connected with host computer (7), carries out 485 transducers (6) of the described controller of remote operation (3) by host computer (7).
7. one kind big-and-middle-sized, mesolow motor starter is characterized in that, comprise such as right 1 ~ 6 each described big-and-middle-sized, mesolow motor start-up circuit.
8. one kind big-and-middle-sized, mesolow motor is characterized in that, comprise big-and-middle-sized, mesolow motor starter as claimed in claim 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012204462769U CN202818183U (en) | 2012-09-04 | 2012-09-04 | Large-and-medium sized middle-and-low voltage motor starting circuit, device and motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012204462769U CN202818183U (en) | 2012-09-04 | 2012-09-04 | Large-and-medium sized middle-and-low voltage motor starting circuit, device and motor |
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| Publication Number | Publication Date |
|---|---|
| CN202818183U true CN202818183U (en) | 2013-03-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012204462769U Expired - Fee Related CN202818183U (en) | 2012-09-04 | 2012-09-04 | Large-and-medium sized middle-and-low voltage motor starting circuit, device and motor |
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| CN (1) | CN202818183U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106998166A (en) * | 2017-05-13 | 2017-08-01 | 上海建东科技有限公司 | The soft-start method and control device of a kind of permagnetic synchronous motor |
| CN108432075A (en) * | 2016-01-28 | 2018-08-21 | 伊顿智能动力有限公司 | Including protecting the motor starting machine with monitoring function |
-
2012
- 2012-09-04 CN CN2012204462769U patent/CN202818183U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108432075A (en) * | 2016-01-28 | 2018-08-21 | 伊顿智能动力有限公司 | Including protecting the motor starting machine with monitoring function |
| CN108432075B (en) * | 2016-01-28 | 2020-08-14 | 伊顿智能动力有限公司 | Motor starter comprising protection and monitoring functions |
| US10778000B2 (en) | 2016-01-28 | 2020-09-15 | Eaton Intellectual Power Limited | Electronic motor starter |
| CN106998166A (en) * | 2017-05-13 | 2017-08-01 | 上海建东科技有限公司 | The soft-start method and control device of a kind of permagnetic synchronous motor |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130320 Termination date: 20160904 |
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| CF01 | Termination of patent right due to non-payment of annual fee |