CN114876691A - Electric starting device and method - Google Patents
Electric starting device and method Download PDFInfo
- Publication number
- CN114876691A CN114876691A CN202210746683.XA CN202210746683A CN114876691A CN 114876691 A CN114876691 A CN 114876691A CN 202210746683 A CN202210746683 A CN 202210746683A CN 114876691 A CN114876691 A CN 114876691A
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- Prior art keywords
- starting
- motor
- crankshaft
- successful
- unit
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
- F02N11/00—Starting of engines by means of electric motors
- F02N11/08—Circuits or control means specially adapted for starting of engines
- F02N11/0848—Circuits or control means specially adapted for starting of engines with means for detecting successful engine start, e.g. to stop starter actuation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
- F02N11/00—Starting of engines by means of electric motors
- F02N11/10—Safety devices
- F02N11/106—Safety devices for stopping or interrupting starter actuation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
- F02N2200/00—Parameters used for control of starting apparatus
- F02N2200/04—Parameters used for control of starting apparatus said parameters being related to the starter motor
- F02N2200/041—Starter speed
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
- F02N2300/00—Control related aspects of engine starting
- F02N2300/20—Control related aspects of engine starting characterised by the control method
- F02N2300/2004—Control related aspects of engine starting characterised by the control method using adaptive control
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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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/40—Engine management systems
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Eletrric Generators (AREA)
Abstract
The invention relates to the technical field of generator control, and provides an electric starting device which can promote a generator of an engine to be normally started without additionally increasing starting current, which comprises the engine, a power generation part and a control part, wherein the control part comprises: the control unit is used for switching on the motor to enable the crankshaft to rotate forwards or switching on the motor to enable the crankshaft to rotate backwards; the storage unit is preset with the specified time for positive rotation of the motor and the fixed step number for reverse rotation of the crankshaft; the judging unit is used for acquiring the rotating speed after the crankshaft rotates forwards and judging whether the starting is successful or not within preset specified time through the rotating speed, and if so, the generator is started; when the judging unit judges that the starting is unsuccessful, the control unit is also used for controlling the motor crankshaft to switch to the positive rotation after controlling the motor crankshaft to rotate reversely for a fixed number of steps, the judging unit acquires the rotating speed of the motor again and judges whether the starting is successful or not until the judging unit judges that the starting is successful, and the current starting cycle is stopped.
Description
Technical Field
The invention relates to the technical field of generator control, in particular to an electric starting device and method.
Background
Along with the gradual maturity of generator frequency conversion technique, frequency conversion generator's market popularity is also higher and higher, and the electricity starts as the unanimous function that promotes user's convenience of use, and the demand is also more and more.
The traditional product adopts a scheme of starting a motor for electric starting, and because a generator of a variable frequency generator is a permanent magnet motor and can actually play a role of starting the motor in a starting stage, the application of corresponding starting control by adopting a starting device is more and more extensive at present; however, because the rotation torque required by the piston in the compression stroke is much larger than the torque required by other strokes due to the characteristics of the engine, as shown in fig. 3, when the engine is initially in the compression stroke (top dead center), the power required by the electric starting device to control the generator to start will be larger, and there may be a case that the engine cannot be started.
In order to solve the above problems, patent No. CN201910092232.7 discloses a starter of an engine generator, in which a first current is first applied to start the engine generator, the crankshaft is rotated in a reverse direction, and a second current larger than the first current is applied to rotate the crankshaft in a forward direction after a predetermined time; the known patent document of japanese patent laid-open No. 2012-241562 adopts the following means: when the piston position of the engine is before the compression top dead center position, a predetermined value is set to be increased by a starter generator driver to an initial current value for driving the starter generator supplied to the output winding so as to obtain a channel torque required to go over the compression top dead center. By increasing the current value, the engine can be reliably started even when the piston position of the engine is before the compression top dead center position.
However, when the initial position of the engine is close to the compression top dead center position, particularly in a structure without a sensor for detecting the angle of the crankshaft, the crankshaft rotates forwards after being electrified, and due to the fact that no rotational inertia is added, the crankshaft may be locked and cannot rush over the top dead center requiring the maximum torque, and components may be damaged along with the rapid surge of the current value. In the known patent documents, a first current is first applied to start up to rotate the crankshaft in the reverse direction, and a second current larger than the first current is applied to rotate the crankshaft in the forward direction after a predetermined time; because the first current value for driving the engine to reversely rotate can be different along with the difference of the engine, the same electric starting module cannot be compatible with all engine generator products, and great confusion is brought to the design matching of designers. And the scheme that patent number CN201910092232.7 patent adopted, when the engine just was in top dead center position at the beginning, the hidden danger that corotation reversal all can't pass through will appear, leads to the unable normal start of engine, influences user's start experience.
Disclosure of Invention
An object of the present invention is to provide an electric starter capable of normally starting an engine generator without an additional increase in starting current.
The basic scheme provided by the invention is as follows: an electric starting device comprises an engine, a motor connected with a power generation part;
a power generation unit having a three-phase winding for relative rotation in accordance with rotation of a crankshaft of the engine;
the inverter is used for inverting the direct current provided by the storage battery into alternating current required by starting;
a control part for controlling the three-phase winding power supply from the inverter part to the power generation part to rotate the crankshaft and start the generator, wherein the control part comprises: the control unit is used for conducting the motor to enable the crankshaft to rotate forwards or conducting the motor to enable the crankshaft to rotate backwards;
the storage unit is preset with the specified time for positive rotation of the motor and the fixed step number for reverse rotation of the crankshaft;
the judging unit is used for acquiring the rotating speed after the crankshaft rotates forwards and judging whether the starting is successful or not through the rotating speed within preset specified time, if so, the generator is started, and if so, the generator normally operates and is started;
when the judging unit judges that the starting is unsuccessful, the control unit is also used for controlling the motor crankshaft to switch to the positive rotation after controlling the motor crankshaft to rotate reversely for a fixed number of steps, the judging unit acquires the rotating speed of the motor again and judges whether the starting is successful or not until the judging unit judges that the starting is successful, and the current starting cycle is stopped.
Further, the storage unit is also preset with the starting rotating speed for normal starting of the motor; when the motor is started successfully, the judging unit judges whether the motor rotating speed reaches the starting rotating speed within the specified time, and if so, the motor is started successfully.
Furthermore, the storage unit is also preset with a limit value of the starting times; the control unit is also used for recording the starting times of one time when the rotating speed of the motor does not reach the starting rotating speed after the control unit controls the crankshaft to rotate reversely and rotate forwardly again; the judging unit is also used for judging whether the accumulated starting times exceed a preset limit value, if so, the control unit stops the current starting cycle, and if not, the control unit continues the current starting cycle.
Furthermore, the storage unit is also preset with starting interval time, and when the judgment unit judges that the accumulated starting times do not exceed the limit value, the control unit controls the crankshaft to rotate reversely and rotate forwardly again after waiting for the interval time.
Further, the inverter unit is connected to the battery, and the control unit converts direct current output from the battery via the inverter unit into alternating current and supplies the alternating current to the power generation unit.
Further, the inversion part comprises a boosting unit and an inversion unit, and the low-voltage direct current of the storage battery is boosted and inverted into high-voltage alternating current required by starting through the inversion part.
The invention also provides an electric starting method adopting the electric starting device, which comprises the following steps:
s1, controlling the positive rotation of the motor crankshaft according to the starting signal;
s2, judging whether the starting is successful or not through the rotating speed of the motor within a preset specified time, if the starting is successful, normally running the generator, terminating the current starting cycle, and if the starting is unsuccessful, skipping to S3;
s3, controlling the motor crankshaft to rotate reversely for a fixed number of steps, controlling the crankshaft to rotate forward again, judging whether the starting is successful or not according to the rotating speed, if the starting is successful, normally operating the generator, terminating the current starting cycle, and if the starting is unsuccessful, skipping to S4;
and S4, recording the starting times of the current starting cycle, judging whether the current starting times reach a limit value, if so, terminating the current starting cycle, and if not, skipping to S3.
Further, in S2, when it is determined whether or not the start-up is successful, it is determined whether or not the motor rotation speed reaches the start-up rotation speed within a predetermined time, and if so, it is determined that the start-up is successful.
Further, in S4, if the current starting number does not reach the limit value, the process jumps to S3 after waiting for the interval time.
In the invention, after a starting process is triggered, the motor is firstly controlled to rotate forwards, if the rotating speed does not reach the identification rotating speed of successful starting within the specified time, the motor is controlled to rotate backwards for a fixed number of steps, and then the motor is switched to rotate forwards to try to start again; and if the starting is not successful, executing the next starting attempt again after waiting for the interval time, and stopping starting when the starting times reach the preset upper limit. Compared with the prior art, the novel starting device and the starting mode are provided in the scheme, the starting current does not need to be additionally increased to promote the normal starting of the engine generator, and therefore the starting experience of a user can be effectively improved.
Drawings
FIG. 1 is a block diagram of an electrical starting apparatus in an embodiment of an electrical starting apparatus and method of the present invention;
FIG. 2 is a flow chart of an electrical start-up method in an embodiment of an electrical start-up apparatus and method of the present invention;
FIG. 3 is a schematic diagram of torque required for each stroke of a piston in the prior art.
Detailed Description
The following is further detailed by way of specific embodiments:
the embodiment is basically as shown in the attached figure 1: an electric starting device comprises an engine, a motor connected with a power generation part; the engine in this embodiment is an internal combustion engine.
A power generation unit having a three-phase winding for relative rotation in accordance with rotation of a crankshaft of the engine;
the inverter is used for inverting the direct current provided by the storage battery into alternating current required by starting; the inverter part is connected with the storage battery, and the control part converts the direct current output by the storage battery through the inverter part into alternating current and supplies the alternating current to the power generation part; specifically, the inverter part comprises a boosting unit and an inverter unit, and the low-voltage direct current of the storage battery is boosted and inverted into high-voltage alternating current required by starting through the inverter part.
A control part for controlling the three-phase winding power supply from the inverter part to the power generation part to rotate the crankshaft and start the generator, wherein the control part comprises: the control unit is used for conducting the motor to enable the crankshaft to rotate forwards or conducting the motor to enable the crankshaft to rotate backwards, specifically, the control unit controls the inversion part to supply forward rotation current to the three-phase winding of the power generation part to enable the crankshaft to rotate forwards, and controls the inversion part to supply reverse rotation current to the three-phase winding of the power generation part to enable the crankshaft to rotate backwards, wherein the reverse rotation current is larger than the forward rotation current, and therefore the situation that the crankshaft cannot rotate backwards to a preset position after being clamped is avoided.
The storage unit is preset with the specified time of the positive rotation of the motor, the starting rotating speed of the normal starting of the motor, the fixed step number of the reverse rotation of the crankshaft, the limit value of the starting times and the starting interval time;
the judging unit is used for acquiring the rotating speed after the crankshaft rotates forwards and judging whether the starting is successful or not within preset specified time through the rotating speed, and if so, the generator is started; specifically, when determining whether the starting is successful, the determining unit determines whether the motor rotation speed reaches the starting rotation speed within a prescribed time, determines that the starting is successful if the motor rotation speed reaches the starting rotation speed within the prescribed time, and determines that the starting is unsuccessful if the motor rotation speed does not reach the starting rotation speed within the prescribed time.
When the judging unit judges that the starting is unsuccessful, the control unit is also used for controlling the motor crankshaft to switch to the positive rotation after controlling the motor crankshaft to rotate reversely for a fixed number of steps, the judging unit acquires the rotating speed of the motor again and judges whether the starting is successful or not until the judging unit judges that the starting is successful, and the current starting cycle is stopped.
When the rotating speed of the motor does not reach the starting rotating speed after the control unit controls the crankshaft to rotate reversely and rotate forwardly, the storage unit records the starting times, the judging unit is also used for judging whether the accumulated starting times exceed a preset limit value or not, if so, the control unit stops the current starting cycle, and if not, the control unit controls the crankshaft to rotate reversely and rotate forwardly again after waiting for the interval time to continue the current starting cycle.
When the electric starting device in the embodiment is used, the electric starting device is started after a starting signal is given to the electric starting device through the control switch.
Based on the above electric starting apparatus, as shown in fig. 2, the embodiment further discloses an electric starting method, which includes the following steps:
s1, controlling the positive rotation of the motor crankshaft according to the starting signal;
s2, judging whether the starting is successful or not within a preset specified time according to the rotating speed of the motor, specifically, judging whether the rotating speed of the motor reaches the starting rotating speed within the specified time, if the starting is successful, normally running the generator, terminating the current starting cycle, and if the starting is unsuccessful, skipping to S3;
s3, controlling the motor crankshaft to rotate reversely for a fixed number of steps, controlling the crankshaft to rotate forward again, judging whether the starting is successful or not according to the rotating speed, if the starting is successful, normally operating the generator, terminating the current starting cycle, and if the starting is unsuccessful, skipping to S4;
and S4, recording the starting times of the current starting cycle, judging whether the current starting times reach a limit value, if so, terminating the current starting cycle, and if not, skipping to S3 after waiting for the interval time.
The foregoing is merely an example of the present invention, and common general knowledge in the field of known specific structures and characteristics is not described herein in any greater extent than that known in the art at the filing date or prior to the priority date of the application, so that those skilled in the art can now appreciate that all of the above-described techniques in this field and have the ability to apply routine experimentation before this date can be combined with one or more of the present teachings to complete and implement the present invention, and that certain typical known structures or known methods do not pose any impediments to the implementation of the present invention by those skilled in the art. It should be noted that, for those skilled in the art, without departing from the structure of the present invention, several changes and modifications can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent. The scope of the claims of the present application shall be determined by the contents of the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.
Claims (9)
1. An electric starting device comprises an engine, a motor connected with a power generation part;
a power generation unit having a three-phase winding for relative rotation in accordance with rotation of a crankshaft of the engine;
the inverter is used for inverting the direct current provided by the storage battery into alternating current required by starting;
a control unit for controlling the energization of the three-phase winding of the power generation unit from the inverter unit to rotate the crankshaft and start the generator, characterized in that: the control section includes: the control unit is used for conducting the motor to enable the crankshaft to rotate forwards or conducting the motor to enable the crankshaft to rotate backwards;
the storage unit is preset with the specified time for positive rotation of the motor and the fixed step number for reverse rotation of the crankshaft;
the judging unit is used for acquiring the rotating speed after the crankshaft rotates forwards and judging whether the starting is successful or not within preset specified time through the rotating speed, and if so, the generator is started;
when the judging unit judges that the starting is unsuccessful, the control unit is also used for controlling the motor crankshaft to switch to the positive rotation after controlling the motor crankshaft to rotate reversely for a fixed number of steps, the judging unit acquires the rotating speed of the motor again and judges whether the starting is successful or not until the judging unit judges that the starting is successful, and the current starting cycle is stopped.
2. The electric starting device as set forth in claim 1, wherein: the storage unit is also preset with the starting rotating speed for normal starting of the motor; when judging whether the starting is successful, the judging unit judges whether the rotating speed of the motor reaches the starting rotating speed within the specified time, and if so, the starting is successful.
3. The electric starting device as set forth in claim 2, wherein: the storage unit is also preset with a limit value of the starting times; the control unit is also used for recording the starting times of one time when the rotating speed of the motor does not reach the starting rotating speed after the control unit controls the crankshaft to rotate reversely and rotate forwardly again; the judging unit is also used for judging whether the accumulated starting times exceed a preset limit value, if so, the control unit stops the current starting cycle, and if not, the control unit continues the current starting cycle.
4. An electric starting device according to claim 3, characterized in that: the storage unit is also preset with starting interval time, and when the judgment unit judges that the accumulated starting times do not exceed the limit value, the control unit controls the crankshaft to rotate reversely and rotate forwardly again after waiting for the interval time.
5. The electric starting device as set forth in claim 4, wherein: the inverter unit is connected to a battery, and the control unit converts direct current output from the battery via the inverter unit into alternating current and supplies the alternating current to the power generation unit.
6. An electric starting device according to any one of claims 1 to 5, wherein: the inversion part comprises a boosting unit and an inversion unit, and the low-voltage direct current of the storage battery is boosted and inverted into high-voltage alternating current required by starting through the inversion part.
7. An electric starting method using the electric starting apparatus as set forth in any one of claims 1 to 6, characterized in that: the method comprises the following steps:
s1, controlling the positive rotation of the motor crankshaft according to the starting signal;
s2, judging whether the starting is successful or not through the rotating speed of the motor within a preset specified time, if the starting is successful, normally running the generator, terminating the current starting cycle, and if the starting is unsuccessful, skipping to S3;
s3, controlling the motor crankshaft to rotate reversely for a fixed number of steps, controlling the crankshaft to rotate forward again, judging whether the starting is successful or not according to the rotating speed, if the starting is successful, normally operating the generator, terminating the current starting cycle, and if the starting is unsuccessful, skipping to S4;
and S4, recording the starting times of the current starting cycle, judging whether the current starting times reach a limit value, if so, terminating the current starting cycle, and if not, skipping to S3.
8. The electrical starting method as set forth in claim 7, wherein: in S2, when it is determined whether or not the start is successful, it is determined whether or not the motor rotation speed reaches the start rotation speed within a predetermined time, and if so, it is determined that the start is successful.
9. The electric starting method according to claim 7 or 8, characterized in that: in S4, if the current starting frequency does not reach the limit value, the process jumps to S3 after waiting for the interval time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210746683.XA CN114876691A (en) | 2022-06-29 | 2022-06-29 | Electric starting device and method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210746683.XA CN114876691A (en) | 2022-06-29 | 2022-06-29 | Electric starting device and method |
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| CN114876691A true CN114876691A (en) | 2022-08-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210746683.XA Pending CN114876691A (en) | 2022-06-29 | 2022-06-29 | Electric starting device and method |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105986949A (en) * | 2015-02-13 | 2016-10-05 | 三阳工业股份有限公司 | Method for controlling engine to start through starting and electricity generating device |
| CN106050512A (en) * | 2016-07-01 | 2016-10-26 | 上海渝癸德信息技术服务中心 | Engine start control method |
| CN106401832A (en) * | 2015-07-27 | 2017-02-15 | 三阳工业股份有限公司 | Method for controlling starting of engine by integrated starter and generator |
| TW201825773A (en) * | 2017-01-11 | 2018-07-16 | 三陽工業股份有限公司 | Method for Controlling Engines Running |
| CN110131085A (en) * | 2018-02-08 | 2019-08-16 | 本田技研工业株式会社 | The starter of generator of engine |
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2022
- 2022-06-29 CN CN202210746683.XA patent/CN114876691A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105986949A (en) * | 2015-02-13 | 2016-10-05 | 三阳工业股份有限公司 | Method for controlling engine to start through starting and electricity generating device |
| CN106401832A (en) * | 2015-07-27 | 2017-02-15 | 三阳工业股份有限公司 | Method for controlling starting of engine by integrated starter and generator |
| CN106050512A (en) * | 2016-07-01 | 2016-10-26 | 上海渝癸德信息技术服务中心 | Engine start control method |
| TW201825773A (en) * | 2017-01-11 | 2018-07-16 | 三陽工業股份有限公司 | Method for Controlling Engines Running |
| CN110131085A (en) * | 2018-02-08 | 2019-08-16 | 本田技研工业株式会社 | The starter of generator of engine |
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