DYDJ-DGV high-power motor control technology training device

1. Device characteristics

1. Each functional component adopts a building block structure to facilitate secondary development and function expansion;

2. All experimental connections can be connected on the control panel without direct contact with the motor , which is safe and reliable;

3. All motors are 2kW small and medium-sized power motors used in industrial fields, which can truly reflect the characteristics of the motor itself;

4. The experimental device has voltage and current leakage protection functions to ensure the safety of the operator and the protection of the equipment during the experiment;

5. The complete set is strong, including instruments, special power supplies, motor units, experimental components, and special experimental wires. The performance and specifications of the supporting parts must be closely combined with the experiments.

2. Technical performance

1. Input power: three-phase four-wire AC380V±10% 50Hz

2. Working environment: temperature -10℃～+40℃, relative humidity <85% (25℃), altitude <4000m

3.Device capacity: ≤6kVA

4. Weight: 750kg

5. Overall dimensions: 189cm×80cm×170cm

3. Basic configuration of the device

The experimental device consists of a control panel, an experimental table, AC and DC power supplies, measuring instrument components, load components, motor units, experimental hanging boxes, experimental wires and accessories.

(1) AC power supply part

It provides three-phase 0~450V adjustable AC power supply and single-phase 0~250V adjustable AC power supply. It is equipped with a three-phase coaxial linkage auto-coupling voltage regulator (specification 6kVA, 0~450V). The adjustable AC power output has a short-circuit protection device, which can protect it from phase-to-phase and line-to-line overcurrent and direct short circuit. The power supply of the control panel is controlled by the start and stop button. It also has the functions of leakage audible and visual alarm, overvoltage protection, phase sequence indication, and phase loss indication. It is equipped with three pointer AC voltmeters, which can indicate the three-phase grid voltage through the switch. and three-phase regulated voltage.

(2) DC power supply part

«Dual-channel DC power supply: one channel 0~250V (3A) controllable DC excitation power supply (with underexcitation protection, overcurrent, short circuit and overvoltage protection audible and visual alarm functions), the other channel 0~250V (20A) controllable DC stable power supply The piezo armature power supply (overcurrent, short circuit and overvoltage protection audible and visual alarm function) has two control modes: internal and external. In the internal control mode, the DC voltage output is adjusted through the potentiometer on the panel; in the external control mode, The DC voltage output is controlled by adding a given signal, which can be used for experiments such as motor closed-loop control. It is equipped with a direct digital voltmeter that monitors the excitation voltage and armature voltage output through switch switching.

Synchronous motor excitation power supply: 0~100V (4A), with short circuit protection and overcurrent protection functions.

(3) Timer and alarm recorder (service manager)

It adopts a blue screen LCD display and Chinese menu display, which is intuitive and clear; the key control unit is used to complete operations such as time setting, scheduled alarm setting, and release setting, and has the functions of cutting off the power supply and recording the number of various alarms.

(4) Digital tachometer: It can display 0~3000r/min, uses a coding disk to measure speed, directly displays the motor's speed digitally, and outputs an analog voltage signal for speed feedback.

(5) Digital-analog dual-display DC voltage and ammeter (overall meter):

Two digital-analog dual-display DC voltmeters: measuring range is 0~±500V, divided into four levels: 2V, 20V, 200V, and 500V. Direct key switch switches the range. Input impedance is 10MΩ. Accuracy is 0.2 level. It has over-range audible and visual alarms. , indicating and cutting off the m*n power supply function.

Pointer meter: mirror type, double scale mark, neutral meter structure, sensitive response, can directly measure positive and negative voltages;

Digital display: four-digit digital tube display, automatically determines and displays the polarity of the measured voltage, and the reading is accurate and convenient.

Two digital-analog dual-display DC milliamp meters: the measuring range is 0~±5A, divided into four levels: 20mA, 200mA, 2A, and 5A. The direct key switch switches the range. The accuracy is 0.2 level. It has over-range audible and visual alarms, indications and Cut off the m*n power supply function.

Pointer meter: mirror type, double scale mark, neutral meter structure, sensitive response, can directly measure positive and negative current;

Digital display: four-digit digital tube display, automatically determines and displays the polarity of the measured current, and the reading is accurate and convenient.

Two digital-analog dual-display DC ammeters: measuring range 0~20A, divided into three levels: 2A, 5A, and 20A. Direct key switch switches the range. The accuracy is 1.0. It has the functions of over-range audible and visual alarm, indication and total power cutoff.

Pointer meter: mirror type, double scale mark, neutral meter structure, sensitive response, can directly measure positive and negative current;

Digital display: four-digit digital tube display, automatically determines and displays the polarity of the measured current, and the reading is accurate and convenient.

The entire laboratory is equipped with a laboratory intelligent power management system

Input voltage: three-phase four-wire system 380V±10%, 50HZ; closing condition detection before power on: input overvoltage, undervoltage, ground leakage, overcurrent, any fault, non-closing, and Mandarin voice alarm; Operation detection and protection: input overvoltage, undervoltage, output overcurrent, leakage, any fault will automatically trip and implement protection, and a Mandarin voice alarm will be issued. The protection threshold can be set on site; the overall intelligent power management system in the tr*ning room The closing conditions are detected before powering on. After the power-on conditions are met, the overall intelligent power management system of the tr*ning room automatically closes and restores power supply; it has real-time voltage display/fault number display.

(6) Digital-analog dual-display true RMS AC voltmeter and ammeter (overall meter)

Three true RMS digital-analog dual-display AC voltmeters: the measuring range is 0~500V, divided into four levels: 2V, 20V, 200V, and 500V. The direct key switch switches the range. The input impedance is 10MΩ. The accuracy is 0.5 level. It has over-range sound. It has optical alarm, indication and m*n power cut-off functions, and can measure the true effective value of AC signals (20Hz ~ 20kHz).

Pointer watch: mirror type, pointer display, sensitive response, fast reading;

Digital display: four-digit digital tube display, accurate and convenient reading.

Three digital-analog dual display true RMS AC ammeters: the measuring range is 0~20A, divided into three levels: 2A, 5A, and 20A. The direct key switch switches the range. The accuracy is 0.5 level. It has an over-range audible and visual alarm, indication and cut-off function. The power supply function can measure the true effective value of AC signals (20Hz ~ 20kHz).

Pointer watch: mirror type, pointer display, sensitive response, fast reading;

Digital display: four-digit digital tube display, accurate and convenient reading.

Laboratory equipped with a set of research-type multi-motor control experiment/development components

The DSP program is modularly written in C language. You can also directly use the Matlab language to write the algorithm or use the Simulink library to build the motor control algorithm. Compiling the entire module can automatically generate the DSP code, and after running on the control circuit, the corresponding control signal can be generated. This allows for easy control of four motors and is equipped with a DSP (USB2.0) professional emulator for downloading and burning programs. The upper computer monitoring software is written using Labview software to realize motor start, stop, acceleration and deceleration, forward and reverse rotation switching, PI parameter setting and other controls; at the same time, various waveforms during actual operation of the system can be observed in real time.

Basic configuration and technical requirements:

(1) Processor: TMS320F2812, maximum frequency 150MHz.

(2) Power module: Mitsubishi IPM module PM25RLA120 is required, with a maximum output power of 3.7kW.

(3) Protection function: It has under-voltage protection, over-voltage protection, over-current protection and temperature protection. When any of the above situations occurs, the PWM pulse output is immediately blocked.

(4) Matching motors (four types of motors):

(a) DC brush motor: rated voltage 220V, rated current 1.2A, rated power 185W, rated speed 1600r/min;

(b) Brushless DC motor: effective current value 0.94A, rated power 100W, maximum speed 1500r/min;

(c) Three-phase squirrel-cage asynchronous motor: rated voltage 380V, rated current 1.12A, rated power 370W, rated speed 1400r/min;

(d) Three-phase permanent magnet synchronous motor: rated voltage 380V, rated current 0.35A, rated power 180W, rated speed 1500r/min.

(6) The human-computer interaction interface adopts a 7-inch touch screen, which is used to display the motor type, motor speed and motor operating status, and can control the start and stop of the motor.

experimental project:

(1) DC brush motor PWM control speed adjustment experiment (C language version)

(a) Open-loop PWM reversible DC speed regulation experiment

(b) Speed ​​single closed-loop PWM reversible DC speed regulation experiment

(c) Speed ​​and current double closed-loop PWM reversible DC speed regulation experiment.

(2) Brushless DC motor PWM control speed experiment (C language version)

(a) Brushless DC motor control principle experiment

(b) Speed ​​and current double closed-loop speed regulation experiment

(c) Positioning control experiment

(3) Three-phase asynchronous motor open-loop frequency conversion speed regulation experiment (C language version)

(a) DSP controlled SPWM frequency conversion speed regulation experiment

(b) DSP controlled saddle wave frequency conversion speed regulation experiment

(c) DSP controlled SVPWM frequency conversion speed regulation experiment

(4) Three-phase asynchronous motor open-loop frequency conversion speed regulation experiment (Matlab/Simulink version)

(a) DSP controlled SPWM frequency conversion speed regulation experiment

(b) DSP controlled saddle wave frequency conversion speed regulation experiment

(c) DSP controlled SVPWM frequency conversion speed regulation experiment

(5) Three-phase AC asynchronous motor FOC control experiment (C language version)

(a) Power unit module test experiment

(b) Current and speed function module test experiment

(c) Current closed-loop regulator function test experiment

(d) Current model function module test experiment

(e) Current and speed double closed-loop control function experiment

(6) Three-phase permanent magnet synchronous motor FOC control experiment (C language version)

(a) Power unit module test experiment

(b) Current and speed function module test experiment

(c) Current closed-loop regulator function test experiment

(d) Phase initialization test experiment

(e) Current and speed double closed-loop control function experiment

(7) High-performance frequency conversion speed regulation experiment of field-oriented control (FOC) (Matlab/Simulink version)

(8) High-performance frequency conversion speed regulation experiment of direct torque control (DTC) (Matlab/Simulink version)

(7) Single-phase transformer, three-phase core transformer

«Single-phase transformer: capacity 0.44kVA, high-voltage end 220V/2A, low-voltage end 110V/4A, installed in the control panel, the transformer terminals are directly led to the panel, making experimental wiring convenient.

«(Three-phase transformer: capacity 1.2kVA, high-voltage end 220V/1.82A, low-voltage end 110V/3.64A, installed in the control panel, the transformer terminals are directly led out to the panel, making experimental wiring convenient.

«Three-phase coupling adjustable reactor

A three-phase linkage adjustable reactor is composed of three 0~80mH~90mH, 6A reactors and a 3kVA three-phase voltage regulator. The terminals are directly led out to the panel, making experimental wiring convenient.

(8) Three-phase coupling adjustable resistive load

A 265Ω/6.5A three-phase adjustable load resistor is provided, and the terminals are directly led to the panel, making experimental wiring convenient.

(1) DC motor and three-phase synchronous generator

1) DC motor: rated power PN=2.2KW, rated speed nN=1500r/min, UN=220V.

2) Three-phase synchronous generator: rated power: 2KVA, rated voltage AC400V, rated current 3.6A, rated speed 1500RPM, frequency 50HZ. Power factor COSφ=0.8.

3) The encoder completes speed measurement and analog feedback, and the motor terminals are directly led to the panel, making experimental wiring convenient.

(2) DC generator and asynchronous motor unit

1) Three-phase squirrel cage asynchronous motor: rated power: 2.2KW, rated voltage AC380V, rated current 4.7A, rated speed 1500RPM, frequency 50HZ.

2) DC generator: rated power 2.2KW, rated voltage AC220V, rated current 8.7A, rated speed 1500RPM. The excitation current is 0.47A and the excitation voltage is 200V.

3) The encoder completes speed measurement and analog feedback, and the motor terminals are directly led to the panel, making experimental wiring convenient.

1. Experimental table

The experimental table is made of iron with a double-layer matt dense spray-p*nted structure. The tabletop is made of fireproof, waterproof, and wear-resistant high-density board. It has a solid structure and is shaped like a rectangular closed structure. It is beautiful and elegant in shape. It is equipped with a large drawer for placing Tools, materials, etc. The tabletop provides a spacious and comfortable work surface. The experimental table is also equipped with four universal wheels and four fixed adjustment mechanisms for easy movement and fixation.

2. Experiment hanging box

(1) Intelligent single and three-phase power and power factor meter

It is composed of two sets of microcomputers, high-speed and high-precision A/D conversion chips and full digital display circuits, and is equipped with a power summation meter to directly display the three-phase total power. The intelligent control mode of human-machine dialogue is realized through key control and digital display window. In order to improve the measurement range and test accuracy, the sampling signals of the measured voltage and current instantaneous values ​​are converted by A/D, and a dedicated DSP is used to calculate the active power, reactive power, single-phase power and three-phase power. The accuracy is 0.5 level. The voltage , current ranges are 500V and 20A respectively, and can measure the active power, reactive power, power factor and properties of the load, etc.

(2)Air switch assembly

Two 20A circuit breaker switches are provided.

(3) Rotating light and step meter components

Provide three sets of rotating lights for grid connection (two each for yellow, green and red) and one Mz10 step meter.

(4)Relay contact control component

Provides one three-phase four-wire *r switch (16A), three start-stop buttons, two AC contactors (220V, 18A), and two thermal relays (220V, 4~6A). Provide Y/△ starting circuit and energy consumption braking circuit.

3.European style lead frame

The device is equipped with a European-style wire frame for hanging and placing special connection wires for experiments. The overall dimensions are 530mm×430mm×1200mm. It is equipped with five universal wheels and has a beautiful and elegant appearance.

4. High-reliability sheathed pistol insertion test wires and accessories

It adopts a high-reliability sheath structure to plug in the connecting wire (good contact, safe and reliable). The inside is made of oxygen-free copper to form a h*r-thin multi-strand wire to achieve the purpose of ultra-softness. It is covered with a nitrile polyvinyl chloride insulation layer. It has the advantages of softness, high pressure resistance, high strength, anti-hardening, and good toughness. The plug is made of solid copper and is protected by a soft rubber layer for reliable contact.

4. Experimental projects

1. DC motor experiment

(1) Test of cold DC resistance of DC motor

(2) DC motor starts, adjusts speed and changes direction

(3) DC motor mechanical characteristics experiment

(4) DC motor speed regulation characteristics experiment

2. Single-phase transformer experiment

(1) No-load experiment of single-phase transformer

(2) Short circuit experiment of single-phase transformer

(3) Load experiment of single-phase transformer (resistive, inductive, resistive-inductive)

3. Three-phase core transformer experiment

(1) Three-phase core transformer no-load experiment

(2) Three-phase core transformer short circuit experiment

(3) Three-phase core transformer load experiment (resistive, inductive, resistive-inductive)

(4) Determination of polarity and connection group of three-phase core transformer

4. Three-phase squirrel cage asynchronous motor experiment

(1) Test of cold DC resistance of three-phase squirrel cage asynchronous motor

(2) Judgment of stator winding of three-phase squirrel cage asynchronous motor

(3) No-load experiment of three-phase squirrel cage asynchronous motor

(4) Three-phase squirrel cage asynchronous motor short circuit experiment

(5) Three-phase squirrel cage asynchronous motor load experiment

5. Three-phase synchronous generator experiment

(1) Test of cold DC resistance of stator and excitation winding of three-phase synchronous generator

(2) No-load experiment of three-phase synchronous generator

(3) Short circuit experiment of three-phase synchronous generator

(4) Load experiment of three-phase synchronous generator

(5)External characteristics experiment of three-phase synchronous generator

(6) Experiment on regulating characteristics of three-phase synchronous generator

 

(7) Grid connection experiment of three-phase synchronous generator