CN110211472B - An integrated system and method for a series of experiments of DC speed regulation in secondary vocational schools - Google Patents
An integrated system and method for a series of experiments of DC speed regulation in secondary vocational schools Download PDFInfo
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Abstract
本发明公开一种面向中等职业院校的、直流调速系列实验的集成系统和方法。系统由直流调速系列实验的组态和控制装置、组态继电器接线桩阵列、系列实验装置组成；直流调速系列实验的系列实验装置包括控制单元、执行单元、被控对象、测量单元、零速封锁单元。集成系统基于控制理论，集成直流调速的系列实验，有助于职校生寻找直流调速知识要素之间的规律，提高自主学习和自我完善的能力；借助PLC继电器输出模块对端口的通断转换，生成继电器输出端口通断的组态列表，组态列表被映射为系列实验的实验切换，简单直观可靠；直流调速系列实验的集成系统立足现有的直流调速实验装置，降低了开发难度和集成系统的TCO。
The invention discloses an integrated system and method for a series of experiments of direct current speed regulation for secondary vocational colleges. The system consists of configuration and control devices for DC speed regulation series experiments, configuration relay wiring pile arrays, and series of experimental devices; the series of experimental devices for DC speed regulation series experiments include control unit, execution unit, controlled object, measurement unit, zero Fast blocking unit. The integrated system is based on control theory and integrates a series of experiments of DC speed regulation, which helps vocational school students to find the law between the knowledge elements of DC speed regulation, and improves the ability of self-learning and self-improvement; with the help of PLC relay output module, the port is switched on and off. , generate the configuration list of the relay output port on/off, the configuration list is mapped as the experimental switching of a series of experiments, which is simple, intuitive and reliable; the integrated system of the DC speed regulation series experiments is based on the existing DC speed regulation experimental device, which reduces the difficulty of development and TCO of the integrated system.
Description
Technical Field
The invention belongs to the technical field of direct current speed regulation experiments. In particular to an integrated system and a method for direct current speed regulation series experiments for medium-class vocational colleges based on a control theory.
Background
Referring to the teaching outline of the institute of XXX technicians in Hangzhou City, the DC speed regulation course at 52 hours comprises 7 typical experiments: open-loop direct current speed regulation, a direct current speed regulation cabinet, rotational speed negative feedback single-closed loop direct current speed regulation, rotational speed negative feedback single-closed loop static-difference-free direct current speed regulation, direct current speed regulation cabinet voltage negative feedback single-closed loop direct current speed regulation, double-closed loop direct current speed regulation and a direct current speed regulation cabinet double-closed loop system. In the experiments 2, 5 and 7, a teacher performs demonstration experiments on a direct current speed regulation cabinet, and students only need to observe and think without wiring operation; therefore, the focused experiments 1, 3, 4 and 6 are discussed in detail herein. The integrated system of the DC speed regulation series experiment is based on the control theory: the controlled object is the same as the direct-current speed-regulating motor; the execution unit comprises a three-phase rectifier transformer T, six thyristors VT 1-VT 6 and a trigger circuit, and are the same; the measuring unit, the speed measuring circuit or and the current feedback and overcurrent protection circuit are configured as required; the control unit, the current regulator or the speed regulator are configured according to requirements. An integrated system of direct current speed regulation series experiments guides students to search potential rules and relationships among direct current speed regulation knowledge elements from the perspective of a cybernetics; by means of analogy and induction, all elements and layers of the knowledge system are considered as a unified organic whole. The knowledge system is not the 'accumulation' and 'mixing' of simple knowledge points, and comprises the dual connotation of knowledge quantity and knowledge structure; the reading can not only see trees but also forests, and the deep level relation among knowledge points is mined through experiments to cultivate the self-learning and self-perfection consciousness. The summary of the more representative intellectual property achievements in the aspect of the electrical experiment integrated system is as follows:
the invention relates to an integrated control system experimental device and an operation method (ZL201010172666.7), and provides the integrated control system experimental device which comprises a direct current/alternating current speed regulation control system, a servo control system, an elevator group control system and other systems, so that students can realize the integration of control systems of different controlled objects in the role of an engineer.
The invention relates to a mechatronic general teaching platform (ZL201310155929.7), and provides standardized mechatronic teaching equipment for trainees to master the development and integration of mechatronic technology.
The beneficial exploration is an overview of research results in the aspect of electrical experiment integration: integration of different electrical control systems and integration of electromechanical integrated equipment. Based on a control theory, a system and a method for integrating direct current speed regulation series experiments are not involved to the present; therefore, it is necessary to make further innovative design based on the existing results.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides an integrated system and method for a direct current speed regulation series experiment.
An integrated system of direct current speed regulation series experiments is characterized in that the system consists of a configuration and control device of the direct current speed regulation series experiments, a configuration relay wiring pile array of the direct current speed regulation series experiments and a series experiment device of the direct current speed regulation series experiments, wherein the series experiment device of the direct current speed regulation series experiments comprises a control unit, an execution unit, a controlled object, a measurement unit, a zero-speed locking unit and a three-phase alternating current power supply; during closed-loop control, the measuring unit acquires a controlled variable value of a controlled object, the deviation is a set value-the controlled variable value, the control unit inputs the deviation and substitutes the deviation into a control method formula and outputs a control quantity, and the execution unit acts on the controlled object and adjusts the controlled variable value according to the control quantity; during open-loop control, the execution unit directly acts on a controlled object according to a set value and adjusts a controlled variable value; the control unit is a logic unit of the integrated system, and the soft and hard platform of the control unit is a configuration and control device;
the configuration and control device comprises a CPU224XP module of S7200 PLC, a relay output SM322 module, a module in/out and timer module of the CPU module, a communication module of the CPU module, a power NES-75-24 module and a touch screen MT8070iH module; the configuration relay wiring pile array comprises a 1 st wiring pile KM1 and a 2 nd wiring pile KM2 which are gradually increased to an 11 th wiring pile KM11 in sequence, and the configuration relay wiring pile array is embedded in a series of experimental devices; the 1 st relay output port of the relay output SM322 module is connected with the 1 st wiring pile KM1, the 2 nd relay output port is connected with the 2 nd wiring pile KM2, and the output ports of the relays are gradually increased to the 11 th relay output port one by one in sequence and connected with the 11 th wiring pile KM 11;
according to the requirements of direct current speed regulation series experiments, inputting on-off values of 1 st to 11 th wiring piles of a configuration relay wiring pile array on a touch screen MT8070iH module, namely mapping the direct current speed regulation series experiments into a configuration list of relay output ports; the CPU224XP module controls the on-off of the relay output SM322 module port by referring to the configuration list of the relay output port, namely, the connection required when the DC speed regulation series experiment is switched is completed under the control of the configuration and control device; in the DC speed regulation series experiment, the pulse quantity, the mold in/out quantity and the opening in/out quantity of the measuring unit and the executing unit are correspondingly connected with the pulse, the mold in/out and the opening in/out ports of the configuration and control device.
The control unit of the series experimental device consists of a speed regulator and a current regulator, when the double closed-loop control is carried out, the output of the speed regulator is the input of the current regulator and forms an inner-outer loop cascade structure, the input of the speed regulator is the deviation which is a set value-a controlled variable value, and the output of the current regulator is the control quantity of the execution unit; the execution unit consists of a trigger circuit, a positive bridge power amplifier circuit and a rectifying circuit, the control quantity of the execution unit determines the trigger angle of the trigger circuit, and the direct current for driving the controlled object is output through the positive bridge power amplifier circuit and the rectifying circuit; the zero-speed locking unit eliminates the crawling phenomenon of the direct current speed regulating motor when a small signal is set, and outputs the rotating speed and current data of the direct current speed regulating motor of the controlled object to the speed regulator and the current regulator; configuring the 1 st to 11 th wiring piles of the relay wiring pile array, configuring circuit nodes of the series experimental devices according to needs, and realizing experimental switching of the series experimental devices by means of on-off switching of a relay output SM322 module port;
the rectifier circuit comprises a 1 st thyristor VT1, a 2 nd thyristor VT2, a 6 th thyristor VT6 and a three-phase rectifier transformer T, wherein the thyristors are gradually increased one by one; the primary side and the secondary side of the transformer are connected in a Y-type mode, VT1, VT3 and VT5 in six thyristors are connected in a common cathode mode, and VT4, VT6 and VT2 are connected in a common anode mode to form a classic bridge arm series rectifier; the primary side of the three-phase rectifier transformer T is connected with commercial power, and the direct current output after rectification by the thyristor is used by a direct current speed regulation motor of a controlled object;
a double-closed-loop direct current speed regulation system is formed by adding a current regulator into a rotating speed negative feedback single-closed-loop direct current speed regulation system, wherein the output of the speed regulator is used as the input of the current regulator, and the output of the current regulator controls a thyristor rectification circuit.
The flow of the direct current speed regulation series experiment integration method comprises a preparation flow of the direct current speed regulation series experiment integration method and an operation flow of the direct current speed regulation series experiment integration method;
preparation process of DC speed regulation series experiment integration method
Configuration list of relay output ports for establishing DC speed regulation series experiment
According to the experimental requirements, a configuration list of relay output ports is generated on a touch screen MT8070iH module, and 1/0 in the list represents on/off of a relay;
configuration list of relay output port
| KM1 | KM2 | KM3 | KM4 | KM5 | KM6 | KM7 | KM8 | KM9 | KM10 | KM11 | |
| Experiment 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Experiment 2 | × | × | × | × | × | × | × | × | × | × | × |
| Experiment 3 | 0 | 1 | 1 | 1 | 1 | 1 | 1 | 0 | 1 | 0 | 0 |
| |
0 | 1 | 1 | 1 | 1 | 0 | 1 | 1 | 1 | 0 | 0 |
| Experiment 5 | × | × | × | × | × | × | × | × | × | × | × |
| Experiment 6 | 0 | 1 | 1 | 1 | 1 | 0 | 0 | 1 | 1 | 1 | 1 |
| Experiment 7 | × | × | × | × | × | × | × | × | × | × | × |
A series of experimental apparatus inserts configuration and controlling means
The terminal posts of the configuration relay terminal post array are correspondingly connected with the relay output ports of the relay output module SM322 one by one
The pulse quantity, the mold in/out quantity and the opening in/out quantity of the measuring unit and the execution unit are correspondingly connected with the pulse, the mold in/out and the opening in/out ports of the configuration and control device
Selecting experiments in the DC speed regulation series experiments on the relay output port configuration list
Selecting experiment 1, experiment 3 and experiment 6 from the configuration list of the touch screen MT8070iH module
The operation flows of the integrated method of the direct current speed regulation series experiment 1, experiment 3 and experiment 6 are generated one by one for the configuration of the series experiment device
DC speed regulation series experiment for implementing selection
CPU224XP download touch screen MT8070iH configuration list selection experiment implements the experiment selected on the configuration list one by one
Analyzing, analogizing and generalizing to find out the law between the knowledge elements of DC speed regulation
Record experimental data, analyze, analogize and summarize
Finding laws between dc speed regulation knowledge elements
Case 1: reselecting experiment on touch screen MT8070iH module configuration list
Case 2: new control algorithm loaded by touch screen MT8070iH module
Case 3: speed-regulating motor for replacing DC
Case 4: repeat the experiment
Case 5: fourth step
The third experiment was continued
A transition device
Fourth step
end。
Compared with the background technology, the invention has the following beneficial effects: based on a control theory, a series of experiments of direct current speed regulation are integrated, so that students can find rules among direct current speed regulation knowledge elements, autonomous learning capacity is improved, and self sustainable development is realized; the PLC relay output module is used for carrying out on-off configuration on the relay output port to generate a configuration list of the relay output port, and the experiment switching of the series experiment is mapped into the configuration list, so that the method is simple, visual and reliable; the series of experimental devices of the direct current speed regulation series experiment are based on the existing direct current speed regulation experimental device, and the development difficulty and the TCO of an integrated system are reduced.
Drawings
FIG. 1(a) is a block diagram of a DC speed regulation series experiment integrated system;
FIG. 1(b) is a control schematic diagram of a DC speed regulation series experiment integrated system;
FIG. 2(a) is a block diagram showing the structure of a series of experimental apparatuses;
FIG. 2(b) is a circuit diagram of a rectifier circuit;
FIG. 2(c) is a schematic diagram of a double closed loop DC governor system;
FIG. 3(a) is a flow chart of a DC speed regulation series experiment integration method;
FIG. 3(b) is a flow chart of the preparation of the DC slew rate series experimental integration method;
FIG. 3(c) is a block diagram of an open-loop DC governor system experiment;
FIG. 3(d) is a block diagram of a speed negative feedback single closed loop DC speed regulation system experiment;
FIG. 3(e) is a block diagram of an experiment of a double closed-loop DC speed regulation system;
FIG. 3(f) is a flow chart of the operation of the DC speed regulation series experiment integration method.
Detailed Description
As shown in fig. 1(a), fig. 1(b), and fig. 2(a), the integrated system of the dc speed regulation series experiment is composed of a configuration and control device 100 of the dc speed regulation series experiment, a configuration relay wiring pile array 200 of the dc speed regulation series experiment, and a series experiment device 900 of the dc speed regulation series experiment, where the series experiment device 900 of the dc speed regulation series experiment includes a control unit 300, an execution unit 400, a controlled object 500, a measurement unit 600, a zero-speed blocking unit 700, and a three-phase ac power supply 800; during closed-loop control, the measurement unit 600 collects a controlled variable value of the controlled object 500, the deviation is a set value-the controlled variable value, the control unit 300 inputs the deviation and substitutes the deviation into a control method formula and outputs a control quantity, and the execution unit 400 acts on the controlled object 500 according to the control quantity and adjusts the controlled variable value; during open-loop control, the execution unit 400 directly acts on the controlled object 500 according to a set value and adjusts a controlled variable value; the control unit 300 is a logic unit of the integrated system, and the hardware platform thereof is the configuration and control device 100;
the configuration and control device 100 comprises a CPU224XP module 110 of S7200 PLC, a relay output SM322 module 120, a module in/out and timer module 130 of the CPU module, a communication module 160 of the CPU module, a power source NES-75-24 module 170 and a touch screen MT8070iH module 180; the configuration relay terminal array 200 comprises a 1 st terminal KM 1201 and a 2 nd terminal KM 2202, which are gradually increased to a 11 th terminal KM 11211 in sequence, and the configuration relay terminal array 200 is embedded in the series experimental device 900; a 1 st relay output port of the relay output SM322 module 120 is connected with a 1 st wiring pile KM 1201, a 2 nd relay output port is connected with a 2 nd wiring pile KM 2202, and the relay output ports are gradually increased to an 11 th relay output port in sequence and connected with an 11 th wiring pile KM 11211;
according to the requirements of direct current speed regulation series experiments, inputting on-off values of 1 st to 11 th wiring piles of a configuration relay wiring pile array 200 on a touch screen MT8070iH module 180, namely mapping the direct current speed regulation series experiments into a configuration list of relay output ports; the CPU224XP module 110 controls the on-off of the relay output SM322 module 120 port with reference to the configuration list of the relay output port, that is, the connection required for switching the dc speed regulation series experiment is completed under the control of the configuration and control device 100; in the dc speed regulation series experiment, the pulse quantity, the mold in/out quantity, and the open in/out quantity of the measurement unit 600 and the execution unit 400 are connected to the pulse, the mold in/out, and the open in/out ports of the configuration and control device 100 in a one-to-one correspondence.
Description 1: the control unit 300 is a logical unit of a control schematic, and the physical implementation is in the configuration and control device 100; in consideration of the simplicity of the expression, the single closed-loop control of speed and current, and the double closed-loop control of speed to current are not discussed in classification. The series of experimental devices 900 for dc speed-regulating series experiments are based on the existing dc speed-regulating experimental device, and therefore are only mentioned and not described in detail; the control method of the control unit 300 can be classical PID, fuzzy control, prediction or neural network control, etc. Since the pulse amount, the mold in/out amount, and the opening in/out amount of the measuring unit 600 and the executing unit 400 depend on the specific dc speed regulating series experiment, the connection with the configuration and control device 100 is in the known knowledge domain, and the method is handled in a form simplified manner.
As shown in fig. 2(a), 2(b), and 2(c), the control unit 300 of the series experimental apparatus 900 is composed of a speed regulator 310 and a current regulator 320, and in the case of the double closed-loop control, the output of the speed regulator 310 is the input of the current regulator 320 and constitutes an inner-outer-loop cascade structure, the input of the speed regulator 310 is a deviation set value-controlled variable value, and the output of the current regulator 320 is a control amount of the execution unit 400; the execution unit 400 is composed of a trigger circuit 410, a positive bridge power amplifier circuit 420 and a rectifying circuit 430, the control quantity of the execution unit 400 determines the trigger angle of the trigger circuit 410, and the direct current for driving the controlled object 500 is output through the positive bridge power amplifier circuit 420 and the rectifying circuit 430; the measuring unit 600 is composed of a speed measuring circuit 610 and a current feedback and overcurrent protection circuit 620, the zero-speed locking unit 700 eliminates the crawling phenomenon of the dc speed regulating motor when the small signal is set, and outputs the rotating speed and current data of the dc speed regulating motor of the controlled object 500 to the speed regulator 310 and the current regulator 320; configuring the 1 st to 11 th wiring piles of the relay wiring pile array 200, configuring the wiring piles to the circuit nodes of the series experimental device 900 as required, and realizing the experimental switching of the series experimental device 900 by means of the on-off switching of the port of the relay output SM322 module 120;
the rectifying circuit 430 comprises a 1 st thyristor VT 1431, a 2 nd thyristor VT 2432, a 6 th thyristor VT 6436 and a three-phase rectifier transformer T437, wherein the thyristors are gradually increased one by one; the primary side and the secondary side of the transformer are connected in a Y-type mode, VT1, VT3 and VT5 in six thyristors are connected in a common cathode mode, and VT4, VT6 and VT2 are connected in a common anode mode to form a classic bridge arm series rectifier; the primary side of the three-phase rectifier transformer T437 is connected with commercial power, and direct current output after rectification by the thyristor is used by a controlled object 500 direct current speed regulation motor;
a double closed loop direct current speed regulating system is formed by adding a current regulator (320) into a rotating speed negative feedback single closed loop direct current speed regulating system, wherein the output of the speed regulator 310 is used as the input of the current regulator 320, and the output of the current regulator controls a thyristor rectifying circuit 430.
Description 2: in view of the physical implementation of the speed regulator, the current regulator, in the configuration and control device 100, the rectifying circuit has been described in fig. 2 (b); the trigger circuit, the positive bridge power amplifier circuit, the controlled object DC speed regulating motor, the speed measuring circuit, the current feedback and overcurrent protection circuit and the zero-speed locking circuit are mature in technology and belong to the known knowledge range; therefore, the text description only refers to the non-expanded form, and is shown in the block diagram form in fig. 2 (c).
As shown in fig. 3(a), fig. 3(b), fig. 3(c), fig. 3(d), fig. 3(e), fig. 3(f), fig. 1(a), and fig. 2(a), the flow of the dc speed regulation series experiment integration method includes a preparation flow of the dc speed regulation series experiment integration method and an operation flow of the dc speed regulation series experiment integration method;
preparation process of DC speed regulation series experiment integration method
Configuration list of relay output ports for establishing DC speed regulation series experiment
According to the experimental requirements, a configuration list of relay output ports is generated on a touch screen MT8070iH module 180, and a 1/0 representation relay on/off table is shown in the table;
configuration list of relay output port
| KM1 | KM2 | KM3 | KM4 | KM5 | KM6 | KM7 | KM8 | KM9 | KM10 | KM11 | |
| Experiment 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Experiment 2 | × | × | × | × | × | × | × | × | × | × | × |
| Experiment 3 | 0 | 1 | 1 | 1 | 1 | 1 | 1 | 0 | 1 | 0 | 0 |
| |
0 | 1 | 1 | 1 | 1 | 0 | 1 | 1 | 1 | 0 | 0 |
| Experiment 5 | × | × | × | × | × | × | × | × | × | × | × |
| Experiment 6 | 0 | 1 | 1 | 1 | 1 | 0 | 0 | 1 | 1 | 1 | 1 |
| Experiment 7 | × | × | × | × | × | × | × | × | × | × | × |
A series of experimental apparatus inserts configuration and controlling means
The terminal posts of the configuration relay terminal post array 200 are connected with the relay output ports of the relay output module SM 322120 in a one-to-one correspondence manner
The measurement unit 600, the pulse amount, the mold in/out amount, and the open/out amount of the execution unit 400 are connected to the configuration and control device 100 in a one-to-one correspondence with the pulse, mold in/out, and open/in/out ports
Selecting experiments in the DC speed regulation series experiments on the relay output port configuration list
Selecting experiment 1, experiment 3 and experiment 6 from the configuration list of the touch screen MT8070iH module 180
The operation flows of the integrated method of the experiment 1, experiment 3 and experiment 6 direct current speed regulation series of experiments are generated one by one for the configuration of the series of experiment devices 900
DC speed regulation series experiment for implementing selection
The experiments selected on the configuration list are carried out one by one
Analyzing, analogizing and generalizing to find out the law between the knowledge elements of DC speed regulation
Record experimental data, analyze, analogize and summarize
Finding laws between dc speed regulation knowledge elements
Case 1: reselecting experiment on touch screen MT8070iH module 180 configuration list
Case 2: touch screen MT8070iH module 180 loads new control algorithm
Case 3: speed-regulating motor for replacing DC
Case 4: repeat the experiment
Case 5: fourth step
The third experiment was continued
A transition device
Fourth step
end。
Description 3: teachers perform demonstration experiments of experiments 2, 5 and 7 by means of a direct current speed regulation cabinet, and connection and test operations of students are not involved; so the discussion herein is expanded around experiments 1, 3, 4, 6, with example 4 being 3.
Claims (3)
1. An integrated system of direct current speed regulation series experiments is characterized in that the system consists of a configuration and control device (100) of the direct current speed regulation series experiments, a configuration relay wiring pile array (200) of the direct current speed regulation series experiments and a series experiment device (900) of the direct current speed regulation series experiments, wherein the series experiment device (900) of the direct current speed regulation series experiments comprises a control unit (300), an execution unit (400), a controlled object (500), a measurement unit (600), a zero-speed locking unit (700) and a three-phase alternating current power supply (800); during closed-loop control, a measurement unit (600) collects a controlled variable value of a controlled object (500), wherein the deviation = a set value-the controlled variable value, a control unit (300) inputs the deviation and substitutes the deviation into a control algorithm formula and outputs a control quantity, and an execution unit (400) acts on the controlled object (500) according to the control quantity and adjusts the controlled variable value; when open-loop control is performed, the execution unit (400) directly acts on the controlled object (500) according to a set value and adjusts the value of the controlled variable; the control unit (300) is a logical unit of the integrated system;
the configuration and control device (100) comprises a CPU224XP module (110) of S7200 PLC, a relay output SM322 module (120), a module in/out and timer module (130) of the CPU module, a communication module (160) of the CPU module, a power source NES-75-24 module (170) and a touch screen MT8070iH module (180); the configuration relay terminal array (200) comprises a 1 st terminal KM1 (201), a 2 nd terminal KM2 (202), and a 11 th terminal KM11 (211) which are gradually increased in sequence, wherein the configuration relay terminal array (200) is embedded in the series experimental device (900); the 1 st relay output port of the relay output SM322 module (120) is connected with the 1 st wiring post KM1 (201), the 2 nd relay output port is connected with the 2 nd wiring post KM2 (202), and the relay output ports are sequentially increased to the 11 th relay output port one by one and connected with the 11 th wiring post KM11 (211);
inputting on-off values of 1 st to 11 th wiring piles of a configuration relay wiring pile array (200) on a touch screen MT8070iH module (180) according to requirements of direct current speed regulation series experiments, namely mapping the direct current speed regulation series experiments into a configuration list of relay output ports; the CPU224XP module (110) controls the on-off of the relay output SM322 module (120) port by referring to the configuration list of the relay output port, namely, the connection required when the DC speed regulation series experiment is switched is completed under the control of the configuration and control device (100); in the direct current speed regulation series experiment, the pulse quantity, the mold-in/out quantity and the opening/out quantity of the measuring unit (600) and the execution unit (400) are correspondingly connected with the pulse, the mold-in/out and the opening/out port of the configuration and control device (100).
2. The integrated system of the dc speed-regulating series experiment of claim 1, wherein the control unit (300) of the series experiment device (900) is composed of a speed regulator (310) and a current regulator (320), when the double closed loop control is performed, the output of the speed regulator (310) is the input of the current regulator (320), and forms an inner-outer loop cascade structure, the input of the speed regulator (310) is the deviation = set value-controlled variable value, and the output of the current regulator (320) is the control quantity of the execution unit (400); the execution unit (400) consists of a trigger circuit (410), a positive bridge power amplifier circuit (420) and a rectifying circuit (430), the control quantity of the execution unit (400) determines the trigger angle of the trigger circuit (410), and direct current for driving the controlled object (500) is output through the positive bridge power amplifier circuit (420) and the rectifying circuit (430); the measuring unit (600) consists of a speed measuring circuit (610) and a current feedback and overcurrent protection circuit (620), the zero-speed locking unit (700) eliminates the crawling phenomenon of the direct current speed regulating motor when the small signal is set, and outputs the rotating speed and current data of the direct current speed regulating motor of the controlled object (500) to the speed regulator (310) and the current regulator (320); configuring 1 st to 11 th wiring piles of the relay wiring pile array (200), configuring circuit nodes of the series experimental device (900) according to needs, and realizing experimental switching of the series experimental device (900) by means of on-off switching of a port of the relay output SM322 module (120);
the rectifying circuit (430) comprises a 1 st thyristor VT1 (431), a 2 nd thyristor VT2 (432), a 6 th thyristor VT6 (436) which is sequentially increased one by one, and a three-phase rectifier transformer T (437); the primary side and the secondary side of the transformer are connected in a Y-type mode, VT1, VT3 and VT5 in six thyristors are connected in a common cathode mode, and VT4, VT6 and VT2 are connected in a common anode mode to form a classic bridge arm series rectifier; the primary side of the three-phase rectifier transformer T (437) is connected with commercial power, and direct current output after rectification by the thyristor is used by a direct current speed regulation motor of a controlled object (500); a double closed-loop direct current speed regulation system is characterized in that a current regulator (320) is added into a rotating speed negative feedback single closed-loop direct current speed regulation system to form a rotating speed-current double closed-loop direct current speed regulation system, the output of the speed regulator (310) is used as the input of the current regulator (320), and the output of the current regulator controls a rectification circuit (430).
3. A dc speed-regulating series experiment integration method using the integration system of claim 2, wherein the flow of the method comprises a preparation flow of the dc speed-regulating series experiment integration method and an operation flow of the dc speed-regulating series experiment integration method;
preparation process of DC speed regulation series experiment integration method
(1) Configuration list of relay output port for establishing DC speed regulation series experiment
According to the experimental requirements, a configuration list of output ports of a relay is generated on a touch screen MT8070iH module (180), and a 1/0 representation relay on/off table is shown in the table;
configuration list of relay output port
(2) Serial experimental device access configuration and control device
The terminal studs of the configuration relay terminal stud array (200) are correspondingly connected with the relay output ports of the relay output module SM322 (120) one by one;
the pulse quantity, the mold-in/out quantity and the opening-in/out quantity of the measuring unit (600) and the execution unit (400) are correspondingly connected with the pulse, the mold-in/out and the opening-in/out ports of the configuration and control device (100);
(3) experiment in series of experiments for selecting direct current speed regulation on relay output port configuration list
Selecting experiment 1, experiment 3 and experiment 6 from a configuration list of a touch screen MT8070iH module (180);
generating experiment 1, experiment 3 and experiment 6 one by one for the configuration of the series of experimental devices (900);
operation flow of DC speed regulation series experiment integration method
(1) Implementing selected DC speed-regulating series experiment
Downloading a configuration list selection experiment of a touch screen MT8070iH module (180) by a CPU224XP module (110);
carrying out the experiments selected on the configuration list one by one;
(2) analyzing, analogizing and generalizing to find out the rule between DC speed-regulating knowledge elements
Recording experimental data, analyzing, analogizing and inducing;
searching for the rule among direct current speed regulation knowledge elements;
case 1: reselecting the experiment on the configuration list of the touch screen MT8070iH module (180);
case 2: the touch screen MT8070iH module (180) loads a new control algorithm;
case 3: replacing the direct current speed regulating motor;
case 4: the experiment was repeated;
case 5: turning to (4);
(3) continued experiment
Turning (1);
(4) end up
end。
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