Mitsubishi FR-A840-0.75K VFD Debugging Technology Experimental Device with Three-phase Four-wire Power Supply for Open-ended Training

Product Introduction

The Variable Frequency Drive (VFD) Debugging Technology Experimental Device is an advanced VFD speed control device developed based on current VFD speed control training equipment. This device provides an advanced operating platform for VFD technology training and assessment. The VFD Debugging Technology Experimental Device uses the widely used Mitsubishi FR-A840-0.75K VFD. The device completes relevant teaching and training for VFD speed control technology courses. In particular, the system provides open-ended training, which can fully cultivate students' practical skills and lay a solid foundation for future employment.

Technical Specifications

1. Input Power: Three-phase four-wire (or three-phase five-wire) ~380V±10% 50Hz
2. Operating Environment: Temperature -10℃～+40℃, Relative Humidity <85% (25℃)
3. Device Capacity: <1KVA
4. Weight: <110Kg
5. Dimensions: 1400mm×700mm×1200mm
6. Safety Protection: Equipped with leakage current protection device, safety complies with national standards

Device Composition

The frequency converter debugging technology experimental device consists of a control panel, training table, frequency converter training components, relay contact training components, digital/analog input/output setpoint indication components, three-phase asynchronous motor, motor guide rail, speed measuring mechanism, etc.

(I) Control Panel (Iron Double-Layer Matte Textured Powder Coating Structure)

1. AC Power Control Unit:

380V AC power supply U, V, W input fuses (RT28-32 3P fuses) supply power to the device via an air switch. Three LED digital voltmeters are used to observe the three-phase line voltage and monitor the mains voltage. An illuminated fuse is provided for protection. The power supply to the control panel is controlled by a key switch and a start/stop switch.

One set each of three-phase four-wire 380V and single-phase 220V power supplies are provided, with output controlled by a start/stop switch and fuse protection. One three-phase four-wire output socket and one 220V mains socket are provided for instrument use.

2. DC Power Supply, DC Voltage/Ammeter, Logic Output and Indicators, etc.:
1. DC Voltage: 0-10V adjustable output; DC Current: 4-20mA; DC digital voltage/ammeter; voltage range 0-200V, input impedance 10MΩ; ammeter range 0-200 mA, accuracy 0.5 class; also equipped with jog, self-locking buttons, logic switches, and 1K potentiometers.
2. Provides one 5A/24V DC switching regulated power supply.
3. Provides one 0-15V DC adjustable power supply.
3. Relay Contact Training Components:

Provides 3 AC contactors and 1 time relay. All terminals of the above devices are led to the panel, allowing operators to freely wire the circuits, highlighting the training characteristics.

4. Inverter Training Module:

The inverter debugging technology experimental device uses a Mitsubishi FR-A840-0.75K high-performance inverter, three-phase 380V AC power supply, built-in EMC filter, and output power of 0.75KW. Integrated RS485 communication interface, with working modes such as V/F control, sensorless vector speed/torque control, and closed-loop high-precision torque/speed/position control; integrated 12 digital inputs/9 digital outputs, 3 analog inputs/2 analog outputs; equipped with protection functions such as input phase loss, insufficient voltage, overvoltage short circuit, instantaneous power outage, wire breakage detection, position error, and stall prevention.

All terminals of the frequency converter have been led to the panel, the system is completely open, and the operator can build different frequency conversion speed control systems, design wiring, and route the line to realize the control function, which can also improve the operator's hands-on ability.

(II) Three-phase squirrel cage asynchronous motor: AC 380V/△

(III) A set of motor guide rail and photoelectric encoder

(IV) Training table

The training table is made of iron double-layer matte textured powder coating structure, and the desktop is made of fireproof, waterproof, and wear-resistant high-density board; there are two large drawers (with locks) on the left and right sides for placing tools and materials. The computer table is integrated with the design and has a beautiful and generous appearance.

(V) Each experimental platform is equipped with one main unit module and multiple experimental modules.

Practical Training Projects

(I) Relay Contact Control Training

1. Three-phase asynchronous motor jogging control and self-locking control
2. Three-phase asynchronous motor Y/Δ switching start control
3. Three-phase asynchronous motor interlocking forward and reverse rotation control
4. Three-phase asynchronous motor delayed forward and reverse rotation control

(II) Variable Frequency Control Training

5. Variable Frequency Drive Function Parameter Setting and Operation
6. Variable Frequency Drive Alarm and Protection Functions
7. Multi-stage speed selection variable frequency speed regulation
8. External terminal jogging control
9. External terminal remote control
10. Controlling motor running time operation
11. Controlling motor forward and reverse rotation motion control
12. Voltage/current monitor signal output and display
13. Instantaneous power failure variable frequency drive parameter setting
14. External analog quantity (voltage/current) variable frequency speed regulation