CN104375453A - PLC of wind power variable pitch master control system - Google Patents
PLC of wind power variable pitch master control system Download PDFInfo
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- CN104375453A CN104375453A CN201310374420.1A CN201310374420A CN104375453A CN 104375453 A CN104375453 A CN 104375453A CN 201310374420 A CN201310374420 A CN 201310374420A CN 104375453 A CN104375453 A CN 104375453A
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/05—Programmable logic controllers, e.g. simulating logic interconnections of signals according to ladder diagrams or function charts
- G05B19/054—Input/output
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- Automation & Control Theory (AREA)
- Programmable Controllers (AREA)
Abstract
The invention discloses a PLC of a wind power variable pitch master control system. The PLC of the wind power variable pitch master control system comprises a CPU, an encoder unit, an analog quantity output unit and a CAN communication unit which are mutually connected, and further comprises an extension unit. The extension unit comprises a main chip unit, an optical coupling circuit, an operation amplification circuit, an output transistor and a CAN transceiver. The main chip unit comprises a main chip, a digital input unit, a digital output unit, an analog quantity input unit and a CAN interface unit are integrated on the main chip. The input end of the optical coupling circuit is connected with the external digital input unit, and the output end of the optical coupling circuit is connected with the digital input unit. The input end of the output transistor is connected with the digital output unit and the output end of the output transistor is connected with an external output circuit. External analog signals are connected with the analog quantity input unit through the operation amplification circuit. The CAN interface unit is connected with the CAN communication unit through the CAN transceiver. According to the PLC of the wind power variable pitch master control system, the extension unit is used for replacing an original extension unit of the PLC, so that cost is reduced and reliability is high.
Description
Technical field
The invention belongs to program control system field, especially a kind of PLC of wind electricity change paddle master control system.
Background technology
Along with non-renewable energy resources worldwide face exhausted awkward situation, for meeting needed for suitability for industrialized production and human lives, people day by day promote the concern of sun power, wind-force, these renewable resources of waterpower and utilization.Wherein, wind-power electricity generation is a kind of energy generation technologies having developed relative maturity, as the emphasis of China's new forms of energy development strategy.
At present, in wind electricity change paddle master control system, main or dependence PLC realizes the overall control to system, conventional PLC as shown in Figure 1, comprises CPU element, cell encoder, analog output unit, digital quantity input block, analog input unit and digital output unit.Due to high efficiency and the high reliability of PLC, make its application in pitch-controlled system very extensive, almost the pitch-controlled system of the overwhelming majority is all the control realizing pitch-controlled system in this form, but, PLC fancy price and external technical monopoly but become " stumbling-block " that wind-powered electricity generation reduces costs, how while guarantee reliability, successfully reduce costs, become the problem that pendulum is in the urgent need to address in face of enterprise.
Summary of the invention
In view of the defect that above-mentioned prior art exists, the object of the invention is to propose a kind of PLC with the wind electricity change paddle master control system of expanding element.
Object of the present invention will be achieved by the following technical programs:
A PLC for wind electricity change paddle master control system, comprises CPU element, cell encoder, analog output unit, is equipped with a CAN communication unit, described CPU element, cell encoder, is interconnected between analog output unit and CAN communication unit; Also comprise an expanding element; Described expanding element comprises master chip unit, photoelectric coupled circuit, discharge circuit, output transistor and CAN transceiver; Described master chip unit comprises master chip, described master chip is integrated with numerical input unit, digital output unit, analog input unit and CAN interface unit; The input end of described photoelectric coupled circuit is connected with external digital input block, and the output terminal of described photoelectric coupled circuit is connected with described numerical input unit; The input end of described output transistor is connected with described digital output unit, and the output terminal of described output transistor is connected with outside output circuit; External analog signal is connected with described analog input unit by described discharge circuit; Described CAN interface unit is connected with described CAN communication unit by CAN transceiver.
Outstanding effect of the present invention is: the PLC proposing a kind of new wind electricity change paddle master control system, the expanding element of former PLC is replaced with expanding element, decrease the dependence completely to external PLC technology, thus reduce the cost of wind electricity change paddle master control system, ensure high reliability simultaneously.
Below just accompanying drawing in conjunction with the embodiments, is described in further detail the specific embodiment of the present invention, is easier to understand, grasp to make technical solution of the present invention.
Accompanying drawing explanation
Fig. 1 is the PLC schematic diagram of prior art;
Fig. 2 is the PLC schematic diagram of embodiments of the invention 1;
Fig. 3 is the expanding element structural representation of embodiments of the invention 1.
Embodiment
Embodiment 1: the PLC of a kind of wind electricity change paddle master control system of the present embodiment, as shown in Figures 2 and 3, comprise CPU element, cell encoder, analog output unit, is equipped with CAN communication unit, CPU element, cell encoder, is interconnected between analog output unit and CAN communication unit; Also comprise expanding element; Expanding element comprises master chip unit, photoelectric coupled circuit, discharge circuit, output transistor and CAN transceiver; Master chip unit comprises master chip, and master chip is LPC11C24 chip.Master chip is integrated with numerical input unit (DI), digital output unit (DO), analog input unit (AD) and CAN interface unit (CAN); The input end of photoelectric coupled circuit is connected with external digital input block, and the output terminal of photoelectric coupled circuit is connected with numerical input unit; The input end of output transistor is connected with digital output unit, and the output terminal of output transistor is connected with outside output circuit; External analog signal is connected with analog input unit by discharge circuit; CAN interface unit is connected with CAN communication unit by CAN transceiver.CAN transceiver adopts CTM1050T unit.
The present embodiment expanding element replaces original PLC expanding element, and expanding element and contacting of PLC are realized by CAN, and perform CANOPEN agreement between the two, as shown in Figure 3, soft hardware equipment is as follows for expanding element:
Hardware:
1. master chip: master chip adopts the LPC11C24 chip of NXP as kernel control chip, is integrated with CANopen and drives, greatly simplify the exploitation of CANOPEN communications protocol in ROM in this chip slapper.This chip internal is 50MHz Cortex-M0ARM processor, ensure that the processing power of expanding element.
2. numerical input unit (DI)/digital output unit (DO): this unit has the input/output function of digital quantity.Input and realized by isolation optocoupler, each input quantity can accomplish isolation; The output transistor that output quantity is controlled by master chip realizes.
3. analog input unit (AD): this unit has the function of collection to analog quantity.External analog signal, by after discharge circuit process, is input to the analog input unit (AD) of master chip, thus realizes the collection of the signals such as temperature, voltage, electric current.
4.CAN interface unit (CAN): because master chip LPC11C24 inside is integrated with CAN controller, so without the need to additional control chip.CAN transceiver adopts CTM1050T unit, this unit integrated switch power, insulating power supply, and transceiving chip, in one, greatly simplifies circuit design.
The numerical input unit of the present embodiment gathers digital quantity, and the digital quantity gathered inputs master chip by photoelectric coupled circuit, exports output quantity to digital output unit after master chip process by output transistor.Analog input unit gathers analog quantity, and the analog quantity gathered inputs master chip by discharge circuit, and master chip realizes communicate with CAN transceiver by CAN interface unit, and CAN transceiver is contacted by the unit realization of connection CAN communication and PLC's.
The present embodiment proposes a kind of PLC expanding element replacement scheme, main motion control is still added motion control unit to realize by the CPU of PLC, general input and output point is then realized by expanding element, information sharing and control is realized by CANOPEN agreement between them, decrease the dependence completely to PLC, thus the cost reducing wind electricity change paddle master control system does not lose reliability again.
The present invention still has numerous embodiments, all employing equivalents or equivalent transformation and all technical schemes formed, and all drops within protection scope of the present invention.
Claims (1)
1. a PLC for wind electricity change paddle master control system, comprises CPU element, cell encoder, analog output unit, CAN communication unit, described CPU element, cell encoder, is interconnected between analog output unit and CAN communication unit; It is characterized in that: also comprise an expanding element; Described expanding element comprises master chip unit, photoelectric coupled circuit, discharge circuit, output transistor and CAN transceiver; Described master chip unit comprises master chip, described master chip is integrated with numerical input unit, digital output unit, analog input unit and CAN interface unit; The input end of described photoelectric coupled circuit is connected with external digital input block, and the output terminal of described photoelectric coupled circuit is connected with described numerical input unit; The input end of described output transistor is connected with described digital output unit, and the output terminal of described output transistor is connected with outside output circuit; External analog signal is connected with described analog input unit by described discharge circuit; Described CAN interface unit is connected with described CAN communication unit by CAN transceiver.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310374420.1A CN104375453A (en) | 2013-08-16 | 2013-08-16 | PLC of wind power variable pitch master control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310374420.1A CN104375453A (en) | 2013-08-16 | 2013-08-16 | PLC of wind power variable pitch master control system |
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| Publication Number | Publication Date |
|---|---|
| CN104375453A true CN104375453A (en) | 2015-02-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310374420.1A Pending CN104375453A (en) | 2013-08-16 | 2013-08-16 | PLC of wind power variable pitch master control system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105467896A (en) * | 2015-12-25 | 2016-04-06 | 大连尚能科技发展有限公司 | Integrated control system of wind-power low-voltage variable pitch blade |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102385339A (en) * | 2011-09-22 | 2012-03-21 | 苏州能健电气有限公司 | Programmable logic controller (PLC) controlling system and temperature signal collection circuit thereof |
| CN102385340A (en) * | 2011-09-22 | 2012-03-21 | 苏州能健电气有限公司 | Programmable logic controller (PLC) controlling system and signal collection circuit thereof |
| CN102384025A (en) * | 2011-09-22 | 2012-03-21 | 苏州能健电气有限公司 | Programmable logic control (PLC) control system |
| CN102392784A (en) * | 2011-09-22 | 2012-03-28 | 苏州能健电气有限公司 | PLC (programmable logic controller) control system for pitch control systems |
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2013
- 2013-08-16 CN CN201310374420.1A patent/CN104375453A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102385339A (en) * | 2011-09-22 | 2012-03-21 | 苏州能健电气有限公司 | Programmable logic controller (PLC) controlling system and temperature signal collection circuit thereof |
| CN102385340A (en) * | 2011-09-22 | 2012-03-21 | 苏州能健电气有限公司 | Programmable logic controller (PLC) controlling system and signal collection circuit thereof |
| CN102384025A (en) * | 2011-09-22 | 2012-03-21 | 苏州能健电气有限公司 | Programmable logic control (PLC) control system |
| CN102392784A (en) * | 2011-09-22 | 2012-03-28 | 苏州能健电气有限公司 | PLC (programmable logic controller) control system for pitch control systems |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105467896A (en) * | 2015-12-25 | 2016-04-06 | 大连尚能科技发展有限公司 | Integrated control system of wind-power low-voltage variable pitch blade |
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Application publication date: 20150225 |