CN106655899A - Starter motor current limiting starter and control method thereof - Google Patents
Starter motor current limiting starter and control method thereof Download PDFInfo
- Publication number
- CN106655899A CN106655899A CN201610836287.0A CN201610836287A CN106655899A CN 106655899 A CN106655899 A CN 106655899A CN 201610836287 A CN201610836287 A CN 201610836287A CN 106655899 A CN106655899 A CN 106655899A
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- Prior art keywords
- current
- starting
- motor
- resistance
- limiting
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Classifications
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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
- H02P1/00—Arrangements for starting electric motors or dynamo-electric converters
- H02P1/16—Arrangements for starting electric motors or dynamo-electric converters for starting dynamo-electric motors or dynamo-electric converters
- H02P1/18—Arrangements for starting electric motors or dynamo-electric converters for starting dynamo-electric motors or dynamo-electric converters for starting an individual dc motor
- H02P1/20—Arrangements for starting electric motors or dynamo-electric converters for starting dynamo-electric motors or dynamo-electric converters for starting an individual dc motor by progressive reduction of resistance in series with armature winding
Abstract
The invention discloses a starter motor current limiting starter and a control method thereof, which belong to the technical field of motor protection devices. Through changing the equivalent resistance of a current limiting resistor serially connected in a starting line, the magnitude of the starting current of the starter motor is controlled, damages to the starter motor, an engine and the starting line due to over large starting current can be solved, the magnitude of the starting current can be controlled according to actual working conditions, the phenomena that the momentary starting current is over large or emergency situations happen during the operation of equipment can be avoided, the starter motor quickly and timely works in a safety limit value, and battery consumption and coil heating are reduced.
Description
Technical field
The present invention relates to a kind of start motor current-limiting starter and its control method, belong to electric motor protective device technology neck
Domain.
Background technology
It is power source when engine is started to start motor, can for engine to be dragged into engine from inactive state
The rotating speed that Novel interior ignition is started.
Diesel engine, to independent operation, needs external force to drive by static.It is exactly to be converted using the electric energy of battery to start motor
For mechanical energy, by diesel engine by the static electrical installation for dragging to start-up ignition.Diesel engine Successful startup is made, dragging rotating speed should
For 1420～200r/min.Starting the loading moment of motor includes：The inertia and frictional resistance of Diesel Engine Mechanical part, cylinder working medium
Initial compression force.According to engine structure, load characteristic, the difference of use environment, to starting the requirement of motor performance also not
Together.
Start the electric current of electrical consumption increases rapid decrease with rotating speed, so that 6.6kW starts motor as an example, starts transient peak
Up to 1600A～2000A, when starting motor speed rises to driving moment to be balanced with the diesel engine moment of resistance, electric current is electric current
500A～900A.Because high current can be such that coil temperature quickly raises, therefore when limiting starting engine every time, persistently start
Time and interval starting time.
Battery is power supply on engine and vehicle, is entered by converting electrical energy into chemical energy when electrical power generators
Row charges, and when outside output current is needed, the energy stored in chemical energy form is converted into electric energy output.Use at present
Starting motor is DC start motor, and connecting motor switch moment is started, generally reachable 2000A of electric current now or so, such as
Fruit battery capacity is increased, and electric current can also be higher.
Transient starting electric current is too high to bring problems with：
1st, to the damage of starting motor, on the one hand high current can increase circuit heating, contact load, on the other hand can make
Dynamic motor output torque increases, and brings the infringement of bearing, gear etc.；
2nd, to the infringement of trigger circuit；
3rd, to the infringement of engine, excessive starting current produces too high starting torque, causes flywheel ring gear stress to increase
Plus and damage, impact service life.
The content of the invention
The technical problem to be solved in the invention is to provide a kind of starting motor current-limiting starter and its control method, solves
Starting current is excessive to starting motor, engine and the infringement of trigger circuit, can control starting current according to practical working situation
Size, makes starting motor work in security limit, reduces battery consumption and coil heating.
To solve above-mentioned technical problem, the technical solution adopted in the present invention is：
A kind of control method for starting motor current-limiting starter, by changing the equivalent of current-limiting resistance in trigger circuit is sealed in
Resistance come control start motor starting current size.
Technical solution of the present invention further improvement is that：Current-limiting resistance is the sub- resistance of current limliting of some parallel connections.
Technical solution of the present invention further improvement is that：The rule of the resistance in Geometric Sequence of the sub- resistance of each current limliting becomes
Change, when the starting current for starting motor exceedes security limit or the maximum current more than the current rotating speed point of starting motor,
The sub- resistance of the current limliting sealed in trigger circuit is disconnected successively according to the ascending order of resistance, until starting current is limited in peace
In full boundary value or less than the maximum current for starting the current rotating speed point of motor.
Technical solution of the present invention further improvement is that：Start on motor after electricity, start the detection of motor current-limiting starter
The starting current of motor is started, current starting current value I is drawn0, while detecting the rotating speed of engine, starting motor is drawn indirectly
Rotating speed v, according to equation below I=(UBAT-k*v)/(rline+r0+r1), calculate the maximum current for starting the current rotating speed point of motor
I, wherein：
I is the maximum current for starting the current rotating speed point of motor；
UBATFor storage battery kinetic potential；
K*v is to start the induced electromotive force produced when motor rotates, reverse with storage battery kinetic potential；
K is constant；
V is starting motor speed；
rlineFor outside line and the all-in resistance of contact；
r0For internal storage battery resistance；
r1For the equivalent resistance of current-limiting resistance；
Then motor current-limiting starter is started to current starting current value I0It is whether excessive to be judged, if current start
Current value I0More than security limit I ', or current starting current value I0Security limit I ' is not above, but it is electric higher than starting
The maximum current I of the current rotating speed point of machine, then starting current controller is according to formula r=(UBAT-k*v)/I-rline-r0, calculate
Resistance value r of needs, and then control the immediate equivalent resistance r of current-limiting resistance1So that r1≥r。
One kind starts motor current-limiting starter, including starting current controller and starting current controller connect respectively
Contactor and engine speed sensor, the current-limiting resistance being connected between contactor coil and contactor normally-closed contact and connect
The current transformer for determining the starting current for starting motor of tentaculum normally-closed contact connection, current transformer is also connected with starting
Current controller, current-limiting resistance starts motor by battery connection.
Technical solution of the present invention further improvement is that：Current-limiting resistance is that the sub- resistor coupled in parallel of 6～20 current limlitings is formed, often
The sub- resistance of one current limliting corresponds to one contactor normally-closed contact of connection.
Technical solution of the present invention further improvement is that：The rule of the resistance in Geometric Sequence of the sub- resistance of each current limliting becomes
Change.
Technical solution of the present invention further improvement is that：Starting current controller is 51 single-chip microcomputers.
Technical solution of the present invention further improvement is that：Starting motor is DC start motor.
Technical solution of the present invention further improvement is that：Battery is lead-acid accumulator, as being two groups of series connection
12V lead-acid accumulators.
As a result of above-mentioned technical proposal, the technological progress that the present invention is obtained is：
From traditional DC start motor rather than retard start motor, because retard start motor is become by gear
Speed reduces starting current improving the rotating speed and output torque of motor, but after retard start motor speed is improved, to bearing, around
Group, brush etc. bring adverse effect so as to which service life will be considerably shorter than traditional DC start motor.Simultaneously the present invention is removed and connect
There is no moving component outside tentaculum, itself and starting motor service life do not have impact, long service life, service precision
It is high.
The rule of the resistance in Geometric Sequence of the sub- resistance of each current limliting changes, change seal in current-limiting resistance in trigger circuit etc.
During effect resistance, less resistance is disconnected first, be because less resistance the sub- resistance of current limliting it is maximum by electric current, then slowly
Disconnection is larger, both can ensure that larger resistance coverage, it can also be ensured that less earth current, prevents electricity
Arc.
From lead-acid accumulator, plate material is the oxide of lead and lead, and electrolyte is sulfuric acid solution, and lead-acid accumulator has
Have the advantages that voltage fall is little when little internal resistance, transformation efficiency high (up to 75%～84%), short time output high current, its
Electromotive force is more stable during electric discharge, stable operating voltage, using temperature and using current range width, can the hundreds of circulations of discharge and recharge,
It is shelf characteric good (be particularly suited for dry battery unit storage), cheap.
Description of the drawings
Fig. 1 is the flow chart of control method of the present invention；
Fig. 2 is the structural representation of the present invention；
Wherein, 1, starting current controller, 21, contactor coil, 22, contactor normally-closed contact, 3, engine speed passes
Sensor, 4, current-limiting resistance, 5, current transformer, 6, battery, 7, start motor.
Specific embodiment
The present invention is described in further details with reference to embodiment：
As depicted in figs. 1 and 2, it is a kind of to start motor current-limiting starter, including starting current controller 1 and starting current
Contactor that controller 1 connects respectively and engine speed sensor 3, it is connected to contactor coil 21 and contactor normally-closed contact
The electric current for determining the starting current for starting motor 7 of current-limiting resistance 4 and contactor normally-closed contact 22 connection between 22 is mutual
Sensor 5, current transformer 5 is also connected with starting current controller 1, and current-limiting resistance 4 starts motor 7 by the connection of battery 6.
Current-limiting resistance 4 is that the sub- resistor coupled in parallel of 6～20 current limlitings is formed, and the sub- resistance of each current limliting corresponds to connection one and connects
Tentaculum normally-closed contact 22, the rule of the resistance in Geometric Sequence of the sub- resistance of each current limliting changes, and such as can be 1 ohm, 2 ohm, 4 Europe
Nurse, 8 ohm, and so on.Starting current controller 1 is 51 single-chip microcomputers, and contactor is west gate subfamily, starts motor 7 and is
DC start motor.Battery 6 is the 12V lead-acid accumulators of two groups of series connection.
Current limited Control method is：Control to start electricity by changing the equivalent resistance for sealing in current-limiting resistance 4 in trigger circuit
The starting current size of machine 7, the rule of the resistance in Geometric Sequence of the sub- resistance of each current limliting changes, when the starting electricity for starting motor 7
When stream is more than security limit or more than the maximum current for starting the current rotating speed point of motor, according to the order that resistance is ascending
The sub- resistance of current limliting sealed in trigger circuit is disconnected successively, until starting current is limited in security limit or less than starting
The maximum current of the current rotating speed point of motor.
Detailed process is：
Start on motor 7 after electricity, internal 51 single-chip microcomputer is detected by current transformer 5 and engine speed sensor 3
The numerical value of streaming current and the rotating speed of engine, draw current starting current value I0, because engine and starting motor 7 pass through gear
Connection, by measuring engine speed, can indirectly draw starting motor speed, and then obtain what is produced when starting motor rotates
Induced electromotive force.According to equation below I=(UBAT-k*v)/(rline+r0+r1), calculate the current rotating speed point of starting motor most
High current I, wherein：
I is the maximum current for starting the current rotating speed point of motor；
UBATFor storage battery kinetic potential；
K*v is to start the induced electromotive force produced when motor rotates, reverse with storage battery kinetic potential；
K is constant；
V is starting motor speed；
rlineFor outside line and the all-in resistance of contact；
r0For internal storage battery resistance；
r1For the equivalent resistance of current-limiting resistance；
Motor switch moment is started connecting, rotating speed is 0, if being not provided with current-limiting resistance in trigger circuit, electricity now
Flow and be：I=UBAT/(rline+r0), electric current is very big, can reach more than 2000A.Therefore it is suitable to access in trigger circuit
Current-limiting resistance.
Then current starting current value I of 51 single-chip microcomputers inside0It is whether excessive to be judged, if current starting current value I0
More than security limit I ', or current starting current value I0Security limit I ' is not above, but it is current higher than motor is started
The maximum current I of rotating speed point, then starting current controller is according to formula r=(UBAT-k*v)/I-rline-r0, calculate needs
Resistance value r, and then control the immediate equivalent resistance r of current-limiting resistance1, by the control contactor break-make of contactor coil 21, change
Change seals in equivalent resistance r of current-limiting resistance 4 in trigger circuit1, it is the sub- resistance of current limliting for first disconnecting minimum ohm to disconnect principle, such as
Fruit can not be restricted to suitable current value, then continue to disconnect the second little sub- resistance of current limliting, finally cause r1>=r, so as to realize
Change to trigger circuit all-in resistance, by current starting current value I0It is restricted in security limit.
Effectively solving starting current of the present invention is excessive to starting motor, engine and the infringement of trigger circuit, can be according to reality
Border working condition control starting current size, it is to avoid transient starting electric current is excessive or equipment operation in emergency situations generation, soon
Speed, starting motor is worked in security limit in time, reduce battery consumption and coil heating, raising equipment uses the longevity
Life, with higher application value.
Claims (10)
1. it is a kind of start motor current-limiting starter control method, it is characterised in that：Current limliting in trigger circuit is sealed in by changing
The equivalent resistance of resistance (4) come control start motor starting current size.
2. it is according to claim 1 start motor current-limiting starter control method, it is characterised in that：Current-limiting resistance is
(4) the sub- resistance of the current limliting of some parallel connections.
3. it is according to claim 2 start motor current-limiting starter control method, it is characterised in that：The sub- resistance of each current limliting
Rule of the resistance in Geometric Sequence change, when the starting current for starting motor (7) exceedes security limit or more than starting
During the maximum current of the current rotating speed point of motor, the current limliting sealed in trigger circuit is disconnected successively according to the ascending order of resistance
Sub- resistance, until starting current is limited in security limit or less than the maximum current for starting the current rotating speed point of motor.
4. it is according to claim 3 start motor current-limiting starter control method, it is characterised in that：Start motor (7)
After upper electricity, the starting current that the detection of motor current-limiting starter starts motor (7) is started, draw current starting current value I0, while
The rotating speed of detection engine, draws starting motor speed v, according to equation below I=(U indirectlyBAT-k*v)/(rline+r0+r1),
The maximum current I for starting the current rotating speed point of motor is calculated, wherein：
I is the maximum current for starting the current rotating speed point of motor；
UBATFor storage battery kinetic potential；
K*v is to start the induced electromotive force produced when motor rotates, reverse with storage battery kinetic potential；
K is constant；
V is starting motor speed；
rlineFor outside line and the all-in resistance of contact；
r0For internal storage battery resistance；
r1For the equivalent resistance of current-limiting resistance；
Then motor current-limiting starter is started to current starting current value I0It is whether excessive to be judged, if current starting current
Value I0More than security limit I ', or current starting current value I0Security limit I ' is not above, but is worked as higher than motor is started
The maximum current I of front rotating speed point, then starting current controller is according to formula r=(UBAT-k*v)/I-rline-r0, calculate needs
Resistance value r, and then control the immediate equivalent resistance r of current-limiting resistance1So that r1≥r。
It is 5. a kind of to start motor current-limiting starter, it is characterised in that：Including starting current controller (1) and starting current control
Contactor that device (1) connects respectively and engine speed sensor (3), it is connected to that contactor coil (21) is normally closed with contactor to be touched
The starting electricity for determining starting motor (7) of current-limiting resistance (4) and contactor normally-closed contact (22) connection between point (22)
The current transformer (5) of stream, current transformer (5) is also connected with starting current controller (1), and current-limiting resistance (4) is by battery
(6) connection starts motor (7).
It is 6. according to claim 5 to start motor current-limiting starter, it is characterised in that：Current-limiting resistance (4) is 6～20 limits
Flow sub- resistor coupled in parallel to form, the sub- resistance of each current limliting corresponds to one contactor normally-closed contact (22) of connection.
It is 7. according to claim 6 to start motor current-limiting starter, it is characterised in that：The resistance of the sub- resistance of each current limliting in etc.
Change than the rule of ordered series of numbers.
It is 8. according to claim 5 to start motor current-limiting starter, it is characterised in that：Starting current controller (1) is 51
Single-chip microcomputer.
9. the starting motor current-limiting starter according to any one of claim 5～8, it is characterised in that：Starting motor (7) is
DC start motor.
10. the starting motor current-limiting starter according to any one of claim 5～8, it is characterised in that：Battery (6) is
Lead-acid accumulator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610836287.0A CN106655899B (en) | 2016-09-21 | 2016-09-21 | Start motor current-limiting starter and its control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610836287.0A CN106655899B (en) | 2016-09-21 | 2016-09-21 | Start motor current-limiting starter and its control method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106655899A true CN106655899A (en) | 2017-05-10 |
| CN106655899B CN106655899B (en) | 2019-09-03 |
Family
ID=58852055
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610836287.0A Active CN106655899B (en) | 2016-09-21 | 2016-09-21 | Start motor current-limiting starter and its control method |
Country Status (1)
| Country | Link |
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| CN (1) | CN106655899B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109538462A (en) * | 2018-11-29 | 2019-03-29 | 江苏江海润液设备有限公司 | A kind of quick start test method of vertical DC pump |
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| CN109538462A (en) * | 2018-11-29 | 2019-03-29 | 江苏江海润液设备有限公司 | A kind of quick start test method of vertical DC pump |
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| Publication number | Publication date |
|---|---|
| CN106655899B (en) | 2019-09-03 |
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