Mitsubishi FR-E820-2.2K-1 inverter adopts metal shell and long-life compone

Common types of Mitsubishi frequency converter



Fr-d700 series



Fr-d700 series frequency converter is a compact multi-function frequency
converter.



1. Power range: 0.4~7.5kw;



2. General flux vector control, 150% torque output at 1Hz;



3. Adopt long-life components;



4. Built in Modbus RTU protocol;



5. Built in braking transistor;



6. Expand PID and triangle wave function;



7. With safety stop function.



Fr-e700 series



Fr-e700 series frequency converter is an economical high-performance frequency
converter.



1. Power range: 0.1~15kw;



2. Advanced flux vector control, 200% torque output at 0.5Hz;



3. Extended PID, flexible PWM;



4. Built in Modbus RTU protocol;



5. Stop accuracy is improved;



6. Add option card fr-a7nc to support CC link communication;



7. Add option card fr-a7nl to support LonWorks communication;



8. Add option card fr-a7nd, which can support deveice net communication;



9. Add option card fr-a7np to support PROFIBUS DP communication.



Fr-a740 series



1. High precision torque / speed / position control can be carried out in
closed loop;



2. Sensorless vector control can realize torque / speed control;



3. Built in PLC function (special model);



4. Use long-life components with built-in EMC filter;



5. Powerful network communication function, supporting DeviceNet, PROFIBUS DP,
MODBUS and other protocols.



Fr-f740 series



1. Power range: 37~220kw;



2. Simple magnetic flux vector control mode, achieving output torque of 120% at
3Hz;



3. Better excitation control mode is adopted to realize higher energy-saving
operation;



4. Built in PID, frequency converter / power frequency switching and multi pump
circulating operation function;



5. Built in RS485 communication port;



6. Use long-life components;



7. Built in noise filter (above 75K);



8. With energy-saving function, the energy-saving effect is clear at a glance.



Adding EMI filter to the input end of Mitsubishi inverter can effectively
suppress the conducted interference of Mitsubishi inverter to the power grid.
Adding input AC and DC reactors can improve the power factor and reduce
harmonic pollution, with good comprehensive effect. When the distance between
some motors and Mitsubishi frequency converter exceeds 100 m, it is necessary
to add AC output reactor at the side of Mitsubishi frequency converter to solve
the leakage current protection caused by the distribution parameters of output
wire to the ground and reduce the external radiation interference. An effective
method is to adopt the method of threading steel pipe or shielding cable, and
reliably connect the steel pipe shell or cable shielding layer with the earth.
It is worth noting that when AC output reactor is not added, if steel pipe
threading or shielded cable method is adopted, the distributed capacitance of
output to ground is increased, and overcurrent is easy to occur. Of course, in
practical application, one or several methods are generally adopted.



Control cabinet: Mitsubishi Inverter should be installed inside the control
cabinet. The following problems should be paid attention to in the design of
the control cabinet. 1. Heat dissipation of Mitsubishi inverter: the heating of
Mitsubishi inverter is caused by internal losses. The main circuit is the main
part of the losses in Mitsubishi frequency converter, accounting for about 98%,
and the control circuit accounts for 2%. In order to ensure the normal and
reliable operation of Mitsubishi inverter, it is necessary to heat the
Mitsubishi inverter. We usually use fans for heat dissipation; The built-in fan
of Mitsubishi frequency converter can take away the heat dissipation inside the
box of Mitsubishi frequency converter. If the fan cannot work normally, stop
the operation of Mitsubishi frequency converter immediately; The high-power
Mitsubishi inverter also needs to add a fan to the control cabinet. The air
duct of the control cabinet should be designed reasonably. All air inlets
should be equipped with dust screens to ensure smooth exhaust, so as to avoid
eddy currents in the cabinet and dust accumulation at fixed positions; The
matching fan shall be selected according to the ventilation volume in the
manual of Mitsubishi inverter, and attention shall be paid to the shockproof
problem in the installation of the fan.



Ambient temperature of Mitsubishi inverter: when the temperature is too high
and the temperature changes greatly, the internal of Mitsubishi inverter is
prone to condensation, and its insulation performance will be greatly reduced,
which may even cause short circuit accidents. If necessary, desiccant and
heater must be added to the tank. In the water treatment room, the water vapor
is generally heavy. If the temperature changes greatly, this problem will be
more prominent.



At present, the A700 series and e700 series of Mitsubishi inverter are widely
used in the market. A700 series is a general-purpose inverter, which is
suitable for occasions with high starting torque and high dynamic response. The
e700 series is suitable for occasions with simple functional requirements and
low requirements for dynamic performance, and has advantages in price.



Electromagnetic wave interference: due to rectification and frequency
conversion during the operation of Mitsubishi frequency converter, a lot of
interference electromagnetic waves are generated around. These high-frequency
electromagnetic waves have certain interference on nearby instruments and
instruments. Therefore, the instrument and electronic system in the cabinet
should use metal shell to shield the interference of Mitsubishi inverter to the
instrument. All components and parts shall be reliably grounded. In addition,
shielded control cables shall be selected for the wiring between electrical
components, instruments and meters, and the shielding layer shall be grounded.
If electromagnetic interference is not handled properly, the whole system will
often fail to work, resulting in control unit failure or damage.

Minimum Order: 1 pieces

Click to Enlarge