CN109510536B - Digital conversion device for speed-increasing signal of generator - Google Patents
Digital conversion device for speed-increasing signal of generator Download PDFInfo
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- CN109510536B CN109510536B CN201811504127.1A CN201811504127A CN109510536B CN 109510536 B CN109510536 B CN 109510536B CN 201811504127 A CN201811504127 A CN 201811504127A CN 109510536 B CN109510536 B CN 109510536B
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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
- H02P9/00—Arrangements for controlling electric generators for the purpose of obtaining a desired output
- H02P9/48—Arrangements for obtaining a constant output value at varying speed of the generator, e.g. on vehicle
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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
- H02P9/00—Arrangements for controlling electric generators for the purpose of obtaining a desired output
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Eletrric Generators (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
Abstract
The application discloses a generator speed-up signal digital conversion device, which comprises a power supply, an instrument single control line access port and an engine input port, wherein the engine input port comprises a speed-up port and an exit speed-up port, and a circuit of the generator speed-up signal digital conversion device comprises: the input end of the PLC is connected with the instrument single control line access port, and the PLC comprises a first output port and a second output port which can be controlled to be pulled down; the first relay and the second relay are respectively connected with the first output port and the second output port; a control contact of the first relay and a control contact of the second relay, wherein the first relay control contact is connected with the speed increasing port, and the second relay control contact is connected with the withdrawal speed increasing port; and the input end of the manual switch is connected with the control contact of the second relay, and the output end of the manual switch is connected with the control contact of the first relay.
Description
Technical Field
The application relates to the technical field of generators, in particular to a digital conversion device for a speed-up signal of a generator.
Background
The generator set generally consists of an engine, a generator and an instrument. The running state of the engine is that the instrument outputs an instruction (signal) after judging the current condition, for example, the engine is firstly warmed up at idle speed after being started, when the water temperature reaches a set value, the instrument gives the engine an instruction for increasing the idle speed to the rated rotation speed (hereinafter referred to as an "speed increasing" instruction, and when the water temperature returns to the idle speed from the rated rotation speed, the engine is referred to as an "speed increasing exiting" instruction), and the engine executes the speed increasing instruction according to the signal of the instrument and enters a power generation preparation state. However, because the engine and the meter are provided by different manufacturers, the problems of inconsistent control modes and signal types between the two parts and unmatched output and requirements are often encountered in the matching process, for example, the engine needs a pulse signal and the meter can provide a high-low level signal, for example, the upper speed and the lower speed of the engine need to be separated from each other by two ports for input, and the meter has only one signal output port and the like. Much cost and labor is required to change the signal of the meter.
The signal of the current main flow control instrument in the market is basically a single-output high-low level signal, namely, a high level signal is output and kept when the condition is met, and the signal becomes a low level when the current control instrument needs to exit (such as stopping), and the control logic is shown in fig. 1.
The engine electric control system in the current market can be divided into the following speed-increasing signal demand types according to different systems:
1. single input: high level (speed up); low level (exit speed increasing)
Control logic: the engine ECU speed increasing control signal has only one input, namely single input control, and the engine considers that the engine obtains a speed increasing instruction when the input control port obtains a high level, and exits the speed increasing instruction when the engine detects that the port level is changed from high to low level, which is the most common control mode. FIG. 2 is a diagram of a single input high and low level control logic.
2. Single input: pulse (speed up); pulse (exit speed increasing)
Control logic: the engine performs a ramp-up action when the ramp-up control input port detects a rising edge of a pulse, and exits the ramp-up command when the engine receives a rising edge of a pulse again. Fig. 3 is a single input: and a single input pulse speed-up and pulse-out speed-up control logic diagram.
3. Double input (speed increasing port + outlet port)
a) Accelerating: the engine is accelerated when the acceleration port detects a pulse signal
b) Exit speed increasing: the exit port detects a pulse signal exit acceleration command
Control logic: in this way, the engine ECU has two receiving command ports, namely a speed increasing input port and an exit port, respectively, and the engine performs a speed increasing action when the speed increasing input port detects a rising edge of a pulse, and exits the speed increasing action when the exit port of the engine receives a rising edge of a pulse. Fig. 4 is a diagram of a dual input (acceleration port + exit port) control logic.
Thus, a single signal type (as in fig. 1) designed according to the current market mainstream meter is not substantially satisfactory for engine control, which is typically solved by:
(1) The signal types are unified by the joint instrument factory and the engine factory. The proposal has the advantages of being capable of transferring the change cost to instrument factories and engine factories, being specially developed and stable in control. A disadvantage of this solution is that the specifications of the instrumentation plant may be different from those of the engine plant, for example it may be that 80% of the customers for the instrumentation plant are in mode 1. In addition, the number of ports of the meter is limited, and if expansion is required, the module needs to be replaced or developed in a targeted manner. For engine manufacturers, because the key points of the application plates are different (the application plates are mainly oriented to vehicle machine plates and the power generation occupy smaller space), 90% of customers use the 2 nd mode, so that both parties cannot easily change the original state of the customers with small sales.
(2) The manufacturer of the machine set with the capability converts the original signal by adding hardware. For example, a time delay relay, a key and other modification modes are added. The advantage of this solution is that it does not need to be modified by the instrumentation and engine plants, and basically can implement the control function. The scheme has the defects of high cost, instability, strong skills of refitters, and changes of the use habit of users, and the later maintenance difficulty caused by the change of the original control circuit of the instrument.
Therefore, the application can carry out digital conversion and packaging on the common instrument control signal types, and can realize the unification of the signals needed and sought by the two parties under the condition of not changing the signals on the two sides (using habit), thereby achieving the purpose of stable control.
The information disclosed in this background section is only for enhancement of understanding of the general background of the application and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person of ordinary skill in the art.
Disclosure of Invention
The application aims to provide a generator speed-up signal digital conversion device which is convenient to operate and stable to control and can meet the control types of various engine speed-up signals.
In order to achieve the above object, the present application provides a generator speed-up signal digital conversion device, which includes a power supply, an instrument single control line access port and an engine input port, the instrument single control line access port is connected with an instrument through an instrument output line, the engine input port includes a speed-up port and an exit speed-up port, and a circuit of the generator speed-up signal digital conversion device includes: the input end of the PLC is connected with the instrument single control line access port, and the PLC comprises a first output port and a second output port which can be controlled to be pulled down; the first relay and the second relay are respectively connected with the first output port and the second output port, so that the output of the first output port and the output of the second output port are respectively subjected to level conversion by the first relay and the second relay; a control contact of the first relay and a control contact of the second relay, wherein the first relay control contact is connected with the speed increasing port, and the second relay control contact is connected with the withdrawal speed increasing port; and the input end of the manual switch is connected with the control contact of the second relay, and the output end of the manual switch is connected with the control contact of the first relay.
In a preferred embodiment, the circuit of the generator speed-up signal digital conversion device further comprises: the input of diode is connected with the output of manual switch, and the output of diode is connected with the control contact of first relay, and first relay includes first coil, and the second relay includes the second coil.
In a preferred embodiment, the speed increasing port is connected to the engine speed increasing input port and the exit speed increasing port is connected to the engine exit speed increasing port.
In a preferred embodiment, when the generator speed-up signal digital conversion device is set to be manually turned on, the engine is only controlled by the speed-up port single input, when the instrument single control line access port receives a high level rising edge from the instrument, the first output port is pulled down for a period of time, the first coil is energized, the control contact of the first relay is turned on for a period of time, and a pulse signal of a period pulse width is generated at the speed-up port.
In a preferred embodiment, when the instrument signal is detected by the instrument single control line access port from a high level to a low level, the second output port is pulled down for a period of time, the second coil is energized, the control contact of the second relay is turned on for a period of time, and the high level is manually switched to generate a pulse signal with a pulse width of a period of time on the speed increasing port through the diode.
In a preferred embodiment, one period of time is 2 seconds or more.
In a preferred embodiment, when the generator speed-up signal digital conversion device is configured to be turned on by a manual switch, the speed-up port is connected to the engine speed-up input port, the exit speed-up port is connected to the engine exit speed-up port, and when the instrument single control line access port receives a high level rising edge from the instrument, the first output port is pulled down for a period of time, the first coil is energized, the control contact of the first relay is turned on for a period of time, and a pulse signal of a period pulse width is generated at the speed-up port to trigger the engine speed-up.
In a preferred embodiment, when the instrument signal is detected by the instrument single control line access port from a high level to a low level, the second output port is pulled down for a period of time, the second coil is energized, the control contact of the second relay is turned on for a period of time, and a pulse signal with a pulse width of a period of time is generated on the exit speed increasing port to trigger the engine to exit speed increasing.
In a preferred embodiment, one period of time is 2 seconds or more.
Compared with the prior art, the generator speed-up signal digital conversion device has the following advantages: the application applies a signal differentiation means, utilizes a differentiation program to respectively take the rising edge and the falling edge of the traditional high-low level control signal at the moment of change as starting points, and generates a corresponding pulse through a delay program to achieve the control requirement, so that the speed-up signal digital conversion device can carry out digital conversion and packaging on the common instrument control signal types, and can realize the unification of 'needed' and 'sought' signals under the condition of not changing the signals on two sides (using habit), thereby achieving the purpose of stable control. The generator speed-up signal digital conversion device has the advantages of low manufacturing cost, good stability, small and light volume, convenient installation and arrangement, and convenient and quick use, and can meet all the current engine speed-up signal control types by only connecting corresponding input and output lines. And because of using the independent conversion package, do not need to change the circuit of former instrument and engine, have no influence to the maintenance in the future.
Drawings
FIG. 1 is a general meter signal and engine state control logic diagram.
Fig. 2 is a single input high-low level control logic diagram.
Fig. 3 is a diagram of a single input pulse (ramp up) pulse (exit ramp up) control logic.
Fig. 4 is a diagram of a dual input (acceleration port + exit port) control logic.
Fig. 5 is a schematic circuit diagram of a speed-up signal digital conversion device according to an embodiment of the present application.
Fig. 6 is a schematic diagram of a signal conversion process of the speed-up signal digital conversion device according to an embodiment of the present application.
Detailed Description
The following detailed description of embodiments of the application is, therefore, to be taken in conjunction with the accompanying drawings, and it is to be understood that the scope of the application is not limited to the specific embodiments.
Throughout the specification and claims, unless explicitly stated otherwise, the term "comprise" or variations thereof such as "comprises" or "comprising", etc. will be understood to include the stated element or component without excluding other elements or components.
As shown in fig. 5 to 6, the generator speed-up signal digital conversion device according to the preferred embodiment of the present application comprises a power supply, an instrument single control line access port P 0 And an engine input port, an instrument single control line access port P 0 Connected to meter 510 via a meter output line, the engine input port includes a speed-up port P 1 And exit acceleration port P 2 And the circuit of the generator speed-up signal digital conversion device comprises: a PLC controller 501, a first relay 502, a second relay 503, a control contact 504 of the first relay, a control contact 505 of the second relay, and a manual switch 506. Wherein, input terminal X of PLC controller 501 0 With instrument single control line access port P 0 In connection with, the PLC controller 501 includes a first output port Y 1 And a second output port Y 2 First output port Y 1 And a second output port Y 2 Pull-down control can be performed according to the logic required. The first relay 502 and the second relay 503 are respectively connected with the first output port Y 1 And a second output port Y 2 Is connected such that the first output port Y 1 And a second output port Y 2 The outputs of (a) are level-converted by the first relay 502 and the second relay 503, respectively. First relay control contact 504 and speed increasing port P 1 Is connected with the second relay control contact 505 and the exit acceleration port P 2 Is connected with each other. An input of the manual switch 506 is connected to the control contact 505 of the second relay, and an output of the manual switch 506 is connected to the control contact 504 of the first relay.
In the above scheme, the circuit of the generator speed-up signal digital conversion device further comprises: a diode 507, an input end of the diode 507 is connected with an output end of the manual switch 506, an output end of the diode 507 is connected with a control contact 504 of the first relay, and the first relay 502 comprises a first coil K 1 The second relay 503 includes a second coil K 2 。
In a preferred embodiment, the speed increasing port P 1 Access to engine speed increasing input port 511 and exit from speed increasing port P 2 The engine exit boost port 512 is connected.
In a preferred embodiment, when the generator speed-up signal-to-digital conversion device is set to manual switch 506 closed, the engine is only connected to speed-up port P 1 When single input control is performed, the instrument single control line access port P 0 Upon receiving a high rising edge from meter 510, a first output port Y 1 Pulling down for a period of time (for example, a period of time may be 2 seconds or more), the first coil K 1 Energizing the control contact 504 of the first relay turns on for a period of time and at the speed increasing port P 1 A pulse signal of a pulse width of one period of time is generated.
In a preferred embodiment, when the instrument is single control line access port P 0 A second output port Y for detecting the falling edge of the instrument signal from high level to low level 2 Pull down for a period of time, the second coil K 2 Energizing the control contact 505 of the second relay turns on for a period of time, the high level being provided at the speed increasing port P by the manual switch 506 through the diode 507 1 And generates a pulse signal with a pulse width of one time period.
In a preferred embodiment, when the generator speed-up signal-to-digital conversion device is set to manual switch 506 on, speed-up port P 1 Connected with the engine speed increasing input port 511 and exits the speed increasing port P 2 When the engine is connected to the engine exit accelerating port 512, the instrument single control line is connected to the port P 0 Upon receiving a high rising edge from meter 510, a first output port Y 1 Pull down for a period of time, the first coil K 1 Energizing the control contact 504 of the first relay turns on for a period of time and at the speed increasing port P 1 A pulse signal of a time period pulse width is generated to trigger the engine to speed up.
In a preferred embodiment, when the instrument is single control line access port P 0 A second output port Y when detecting the falling edge of the instrument 510 signal from high to low 2 Pull down for a period of time, the second coil K 2 Energizing the control contact 505 of the second relayOn exit speed-up port P for a period of time 2 And a pulse signal with a time period pulse width is generated to trigger the engine to exit to speed up.
In a preferred embodiment, one period of time is 2 seconds or more.
It will be appreciated by those skilled in the art that embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
The foregoing descriptions of specific exemplary embodiments of the present application are presented for purposes of illustration and description. It is not intended to limit the application to the precise form disclosed, and obviously many modifications and variations are possible in light of the above teaching. The exemplary embodiments were chosen and described in order to explain the specific principles of the application and its practical application to thereby enable one skilled in the art to make and utilize the application in various exemplary embodiments and with various modifications as are suited to the particular use contemplated. It is intended that the scope of the application be defined by the claims and their equivalents.
Claims (7)
1. The utility model provides a generator speed-up signal digital conversion device, this generator speed-up signal digital conversion device includes power, instrument list accuse line access port and engine input port, instrument list accuse line access port is connected with the instrument through the instrument output line, its characterized in that, engine input port includes speed-up port and withdraws from the speed-up port, and generator speed-up signal digital conversion device's circuit includes:
the input end of the PLC is connected with the instrument single-control line access port, the PLC comprises a first output port and a second output port, and the first output port and the second output port can be controlled to be pulled down;
a first relay and a second relay connected to the first output port and the second output port, respectively, such that outputs of the first output port and the second output port are level-converted by the first relay and the second relay, respectively;
a control contact of a first relay and a control contact of a second relay, wherein the first relay control contact is connected with the speed increasing port, and the second relay control contact is connected with the exit speed increasing port; and
the input end of the manual switch is connected with the control contact of the second relay, and the output end of the manual switch is connected with the control contact of the first relay;
the circuit of the generator speed-up signal digital conversion device further comprises: the input end of the diode is connected with the output end of the manual switch, the output end of the diode is connected with the control contact of the first relay, the first relay comprises a first coil, and the second relay comprises a second coil;
the speed increasing port is connected with the speed increasing input port of the engine, and the exit speed increasing port is connected with the exit speed increasing port of the engine.
2. The generator speed-up signal digital conversion device according to claim 1, wherein when the generator speed-up signal digital conversion device is set to the manual switch to be closed, an engine is controlled by only a speed-up port single input, when the meter single control line access port receives a high level rising edge from the meter, the first output port is pulled down for a period of time, the first coil is energized, a control contact of the first relay is turned on for a period of time, and a pulse signal of a period of time pulse width is generated at the speed-up port.
3. The generator speed-up signal digital conversion apparatus according to claim 2, wherein when the meter signal is detected by the meter single-control line access port as a falling edge of a high level to a low level, the second output port is pulled down for a period of time, the second coil is energized, the control contact of the second relay is turned on for the period of time, and a high level is generated by the manual switch on the speed-up port through the diode as a pulse signal of a pulse width of the period of time.
4. A generator speed-up signal digital conversion apparatus according to claim 3, wherein the one period of time is 2 seconds or more.
5. The generator speed up signal digital conversion device according to claim 1, wherein when the generator speed up signal digital conversion device is set to the manual switch being turned on, the speed up port is connected to an engine speed up input port, the exit speed up port is connected to an engine exit speed up port, when the meter single control line access port receives a high level rising edge from the meter, the first output port is pulled down for a period of time, the first coil is energized, a control contact of the first relay is turned on for a period of time, and a pulse signal of a period of pulse width is generated at the speed up port to trigger the engine speed up.
6. The generator speed-up signal digital conversion apparatus according to claim 5, wherein when said meter single control line access port detects a falling edge of a meter signal from a high level to a low level, said second output port is pulled down for a period of time, said second coil is energized, a control contact of said second relay is turned on for said period of time, and a pulse signal of a pulse width of said period of time is generated on said exit speed-up port to trigger the engine to exit speed-up.
7. The generator speed-up signal digital conversion device according to claim 6, wherein the one period of time is 2 seconds or more.
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| CN201811504127.1A CN109510536B (en) | 2018-12-10 | 2018-12-10 | Digital conversion device for speed-increasing signal of generator |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811504127.1A CN109510536B (en) | 2018-12-10 | 2018-12-10 | Digital conversion device for speed-increasing signal of generator |
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| CN109510536B true CN109510536B (en) | 2023-08-22 |
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| CN101401294B (en) * | 2006-03-17 | 2013-04-17 | 英捷电力技术有限公司 | Variable speed wind turbine having an exciter machine and a power converter not connected to the grid |
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| JPH08232828A (en) * | 1995-02-24 | 1996-09-10 | Toshiba Eng Co Ltd | Governor control device for pelton wheel |
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