Overview
| brand | Mitsubishi | Product characteristics | square |
| series | FR series | model | FR-E740-1.5K-CHT |
| producing area | Japan | Country/region of origin | Japan |
| Application scope | Mechanical machine tools | Number of power supply phases | 3-phase |
| Rated voltage | 220V | Supply voltage | 400V |
| Adaptive motor power | four hundred and eighty | filter | Straight type |
| Nature of DC power supply | A | control mode | Handling |
| Output voltage regulation method | three hundred and sixty | Rated current | four hundred and eighty |
| Material number | sixty-five thousand eight hundred and forty-two | Overall dimensions (width x height x thickness) | 1.5 * 1.2 * 0.8 |
| Appearance | rectangle | ||
Product Details
Detailed introduction to the replacement of FR-A740-22K-CHT 22KW by FR-A840-00620-2-60 for Ling frequency converter
Detailed introduction of Mitsubishi frequency converter
1. Select Mitsubishi frequency converter based on the load torque characteristics of mechanical equipment
In practice, mechanical equipment is often divided into three categories based on different load torque characteristics:
(1) Constant torque load
(2) Constant power load
(3) Fluid load
2. Mitsubishi frequency converter with appropriate control method selected based on load characteristics
The control methods of Mitsubishi frequency converters are mainly divided into: V/f control, including open loop and closed loop; Vector control, including speed sensorless and speed sensorless control; Direct torque control; The advantages and disadvantages of the three methods are as follows:
(1) V/f open-loop control
Advantages: Simple structure, easy adjustment, suitable for general squirrel cage asynchronous motors;
Disadvantages: Low speed torque is difficult, torque control cannot be used, and the speed range is small;
Main application occasions: general fan, pump energy-saving speed regulation, or one frequency converter with multiple motor drives.
(2) V/f closed-loop control
Advantages: Simple structure, high speed regulation accuracy, suitable for universal asynchronous motors;
Disadvantages: Low speed torque is difficult, and torque control cannot be used. The speed range is small, and speed sensors need to be added;
Mainly used in processes such as maintaining pressure, temperature, flow rate, and pH settings.
(3) Vector Control Without Speed Sensors
Advantages: No speed sensor required, good torque response, simple structure, and wide speed control range;
Disadvantages: It is necessary to set motor parameters and have automatic testing function;
Applicable occasions: general industrial equipment, most speed regulation occasions.
(4) Vector control with speed sensor
Advantages: Good torque control performance, good torque response, high speed regulation accuracy, and wide speed control range;
Disadvantages: The motor parameters need to be set correctly, automatic testing function is required, and * * * speed sensor is required;
Usage: High dynamic performance applications requiring * * * control torque and speed.
(5) Direct torque control
Advantages: No speed sensor required, good torque response, simple structure, and large speed control range;
Disadvantages: It is necessary to set motor parameters and have automatic testing function;
Application occasions: High dynamic performance applications requiring * * * control torque, such as cranes, elevators, rolling mills, etc.
3. Select the protective structure of Mitsubishi frequency converter according to the installation environment
The protective structure of Mitsubishi frequency converters should be adapted to their installation environment, which requires consideration of factors such as environmental temperature, humidity, dust, acidity, alkalinity, and corrosive gases. This is closely related to the long-term, stable, safe, and reliable operation of Mitsubishi frequency converters. The protective structures of Mitsubishi frequency converters mainly include:
(1) Open IP00
(2) Enclosed IP20, IP21
(3) Sealed IP40, IP41
(4) Closed type IP54, IP55