CN209375506U - A kind of generator soft starting device avoiding secondary pulse electric current - Google Patents
A kind of generator soft starting device avoiding secondary pulse electric current Download PDFInfo
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- CN209375506U CN209375506U CN201920050382.7U CN201920050382U CN209375506U CN 209375506 U CN209375506 U CN 209375506U CN 201920050382 U CN201920050382 U CN 201920050382U CN 209375506 U CN209375506 U CN 209375506U
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- generator
- contactor
- power supply
- control
- motor
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Abstract
The utility model relates to electric motor starting field, spy is related to a kind of generator soft starting device for avoiding secondary pulse electric current.City's three-phase electricity of the utility model is connect by the first normally opened node with motor, generator is connect by the second normally opened node with motor, detection device is arranged in motor side, for detecting the operating parameter of motor, starting control device is connect with detection device, start control device output signal respectively with generator control unit, first control button and the connection of the second control button, first contactor coil, second normally closed node, access control power supply after the series connection of first control button, second contactor coil, first normally closed node, access control power supply after the series connection of second control button, power supply synchronization device and generator, the electrical connection of city's three-phase, power supply synchronization device is used to detect the voltage of city's three-phase electricity and generator, frequency, whether phase sequence is identical.The utility model solves the problems, such as that alternating current generator starting current is excessive, avoids the occurrence of secondary pulse electric current.
Description
Technical field
The utility model relates to electric motor starting field, spy is related to a kind of generator soft start dress for avoiding secondary pulse electric current
It sets.
Background technique
During startup, full voltage starting electric current is usually 4 to 7 times of rated current to ac motor.Relatively high power
Motor can cause to impact in the limited situation of electrical network capacity to power grid, can select soft starting device at this moment to limit starting electricity
Stream.Existing soft starting device is decompression or frequency reducing to reduce starting current, respectively there is advantage and disadvantage.Generator is started electronic
Machine, when generator power supply is converted to mains supply, it may appear that secondary pulse electric current, there are also certain to rush to equipment and power grid
It hits.
Summary of the invention
In view of the deficiencies of the prior art, the utility model provides a kind of generator soft start for avoiding secondary pulse electric current
Device.The utility model goes to the power supply of city's three-phase electricity, solves alternating current by generator control motor start-up after starting is normal
The excessive problem of machine starting current, and by power supply synchronization device ensure conversion when city's three-phase electricity and generator voltage, frequency
Rate, phase sequence are identical, avoid the occurrence of and secondary go out electric current.
The technical solution of the utility model is: a kind of generator soft starting device avoiding secondary pulse electric current, including inspection
Survey device, starting control device, generator control unit, city's three-phase electricity, motor, generator, first contactor, the second contact
Device, the first control button, the second control button and power supply synchronized detection device；Wherein first contactor includes first contactor line
Circle, the first normally closed node, the first normally opened node, second contactor include second contactor coil, the second normally closed node, second often
Open node；It is characterized by: city's three-phase electricity is connect by the first normally opened node with motor, generator passes through the second normally opened node
It is connect with motor, detection device setting is in motor side, for detecting the operating parameter of motor, starting control device and inspection
Device connection is surveyed, starting control device output signal is pressed with generator control unit, the first control button and the second control respectively
Button connection, access control power supply, second contactor after first contactor coil, the second normally closed node, the series connection of the first control button
Access control power supply, power supply synchronization device and generator, city's three-phase after coil, the first normally closed node, the series connection of the second control button
Whether electrical connection, power supply synchronization device are used to detect the voltage of city's three-phase electricity and generator, frequency, phase sequence identical.
According to a kind of generator soft starting device for avoiding secondary pulse electric current as described above, it is characterised in that: control
Power supply is 24v DC power supply, and first contactor, second contactor are 24v D.C. contactor.
According to a kind of generator soft starting device for avoiding secondary pulse electric current as described above, it is characterised in that: control
Power supply is 220v alternating current, and first contactor, second contactor are 220v A.C. contactor.
According to a kind of generator soft starting device for avoiding secondary pulse electric current as described above, it is characterised in that: city three
Fuse mutually is set between electricity and the first normally opened node.
According to a kind of generator soft starting device for avoiding secondary pulse electric current as described above, it is characterised in that: power generation
Fuse is set between machine and the first normally opened node.
The beneficial effects of the utility model are: first is that during startup using generator, voltage and frequency are from low to high
The characteristics of gradually rising is powered to ac motor, to solve the problems, such as that alternating current generator starting current is excessive.Second is that the first control
Button processed and the second control button electrically and mechanical interlocking, prevent two-way power supply while closing.Third is that ensure that power grid
Safety utilization of electric power, while also avoiding mechanical shock when full voltage starting.Fourth is that secondary pulse electric current can be avoided the occurrence of.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model.
Description of symbols: detection device 1, starting control device 2, generator control unit 3, city three-phase electricity L1, L2,
L3, motor M, generator G, fuse FU, first contactor coil KM1, the first normally closed node B1, the first normally opened node K1,
Second contactor coil KM2, the second normally closed node B2, the second normally opened node K2, the first control button SB1, the second control button
SB2, control power supply V, power supply synchronization device 4.
Specific embodiment
The technical solution of the utility model is described further below in conjunction with attached drawing.
As shown in Figure 1, the generator soft starting device for avoiding secondary pulse electric current of the utility model includes detection device
1, start control device 2, generator control unit 3, power supply synchronization device 4, city three-phase electricity L1, L2, L3, motor M, generator
G, first contactor, second contactor, the first control button SB1, the second control button SB2.Wherein first contactor includes the
One contactor coil KM1, the first normally closed node B1, the first normally opened node K1, second contactor includes second contactor coil
KM2, the second normally closed node B2, the second normally opened node K2.City three-phase electricity L1, L2, L3 pass through the first normally opened node K1 and motor M
Connection, generator G are connect by the second normally opened node K2 with motor M, and detection device 1 is arranged in the side motor M, for detecting
The operating parameter of motor M, such as the revolving speed of motor M.
As shown in Figure 1, starting control device 2 is connect with detection device 1 and power supply synchronization device 4, starting control device 2 is defeated
Signal is connect with generator control unit 3, the first control button SB1 and the second control button SB2 respectively out, first contactor line
Enclose access control power supply V, second contactor coil KM2, the after KM1, the second normally closed node B2, the first control button SB1 series connection
Access control power supply V after one normally closed node B1, the second control button SB2 series connection.As shown in Figure 1, power supply synchronization device 4 and power generation
Whether machine G, city three-phase electricity L1, L2, L3 connection are identical for detecting the voltage of city's three-phase electricity and generator G, frequency, phase sequence.
The control power supply V of the utility model can be 24v DC power supply, and first contactor, second contactor are that 24v direct current connects
Tentaculum.Control power supply V may be 220v alternating current, first contactor, second contactor are 220v A.C. contactor.
It is preferably provided fuse FU between the utility model city three-phase electricity L1, L2, L3 and the first normally opened node K1, to ensure
When normal operation, such as there is over-current phenomenon avoidance, automatically power off, prevents motor from causing electric current excessive because of mechanical clamping stagnation.
It is preferably provided fuse FU between the normally opened node K1 of the utility model generator G and first, when ensuring to start, such as
There is over-current phenomenon avoidance, automatically powers off, prevent motor from causing electric current excessive because of mechanical clamping stagnation.
The course of work of the utility model is: before starting ac motor M, being controlled first by starting control device 2
Generator control unit 3, to start generator G, generator G works after starting successfully in idling mode.Then pass through
Starting control device 2 closes the second control button SB2, and generator G low frequency low voltage power supply is sent into ac motor M.Alternating current
Motivation M starts decompression frequency reducing starting, and (generator output supply voltage is about 220V or so when idling mode, and frequency is about
30Hz, and voltage when idling and frequency can be adjusted according to on-site actual situations).After ac motor M is started turning, control
Motor M is switched to rated speed by idling.Start to gradually rise to generator G supply voltage and frequency, ac motor M's
Revolving speed also gradually rises.When generator G voltage and frequency reach rated value, ac motor M revolving speed also reaches rated value, hands over
The start-up course of galvanic electricity motivation M is completed.After the completion of ac motor is started shipment, power supply synchronization device 4 starts to detect generator G output
The signal of power supply and city's three-phase electricity L1, L2, L3 power supply controls generating set speed regulation, pressure regulation signal according to two-way power supply signal.When
When the frequency of generator G power supply, voltage, phase and all identical city's three-phase electricity L1, L2, L3 power supply, starting control device 2 disconnects the
Two control button SB2, while the first control button SB1 is closed, city three-phase electricity L1, L2, L3 power to ac motor M.Exchange
After motor M runs well, generator G has a power failure automatically.It is powered and is completed by generator G because of ac motor M start-up course, in city
Three-phase electricity L1, L2, L3 big dash current will not occur when powering to ac motor M again, ensure that the safety utilization of electric power of power grid,
Mechanical shock when full voltage starting is also avoided simultaneously.
Claims (5)
1. a kind of generator soft starting device for avoiding secondary pulse electric current, including detection device, starting control device, generator
Control device, city's three-phase electricity, motor, generator, first contactor, second contactor, the first control button, the second control are pressed
Button and power supply synchronization device；Wherein first contactor includes first contactor coil, the first normally closed node, the first normally opened node,
Second contactor includes second contactor coil, the second normally closed node, the second normally opened node；It is characterized by: city's three-phase electricity is logical
It crosses the first normally opened node to connect with motor, generator is connect by the second normally opened node with motor, and detection device setting exists
Motor side, for detecting the operating parameter of motor, starting control device is connect with detection device, starting control device output
Signal is connect with generator control unit, the first control button and the second control button respectively, and first contactor coil, second are often
Access control power supply after close node, the series connection of the first control button, second contactor coil, the first normally closed node, the second control are pressed
Access control power supply, power supply synchronization device are electrically connected with generator, city's three-phase after button series connection, and power supply synchronization device is for detecting city
Whether the voltage of three-phase electricity and generator, frequency, phase sequence are identical.
2. a kind of generator soft starting device for avoiding secondary pulse electric current according to claim 1, it is characterised in that: control
Power supply processed is 24v DC power supply, and first contactor, second contactor are 24v D.C. contactor.
3. a kind of generator soft starting device for avoiding secondary pulse electric current according to claim 1, it is characterised in that: control
Power supply processed is 220v alternating current, and first contactor, second contactor are 220v A.C. contactor.
4. a kind of generator soft starting device for avoiding secondary pulse electric current according to claim 1, it is characterised in that: city
Fuse is set between three-phase electricity and the first normally opened node.
5. a kind of generator soft starting device for avoiding secondary pulse electric current according to claim 1, it is characterised in that: hair
Fuse is set between motor and the first normally opened node.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920050382.7U CN209375506U (en) | 2019-01-11 | 2019-01-11 | A kind of generator soft starting device avoiding secondary pulse electric current |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920050382.7U CN209375506U (en) | 2019-01-11 | 2019-01-11 | A kind of generator soft starting device avoiding secondary pulse electric current |
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| Publication Number | Publication Date |
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| CN209375506U true CN209375506U (en) | 2019-09-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201920050382.7U Active CN209375506U (en) | 2019-01-11 | 2019-01-11 | A kind of generator soft starting device avoiding secondary pulse electric current |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110957721A (en) * | 2019-11-25 | 2020-04-03 | 天津津航计算技术研究所 | Current-limiting starting circuit applied to aviation liquid cooling system |
-
2019
- 2019-01-11 CN CN201920050382.7U patent/CN209375506U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110957721A (en) * | 2019-11-25 | 2020-04-03 | 天津津航计算技术研究所 | Current-limiting starting circuit applied to aviation liquid cooling system |
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