MITSUBISHI inverter FR-D720S series.
Voltage level: single phase 200V.
Frequency converter capacity: 1.5KW.
VVVF frequency control, vector control frequency conversion, direct torque control is a kind of AC - DC - AC frequency conversion FR-F720-15K PDF.
The common drawback is that the input power factor is low, the harmonic current is big, and the DC circuit needs large energy storage capacity,
Renewable energy and can not be fed back to the power grid, which can not be carried out in the four quadrant operation FR-F720-15K To this end, the matrix type of AC - AC variable frequency arises at the historic moment.
Because the matrix type alternating current frequency saves the intermediate DC link, thereby, the elecctrolytic capacitor with large volume and high price can be omitted FR-F720-15K PDF FR-F720-15K Manual .
It can achieve a power factor of L, the input current is sinusoidal and can run in four quadrant, the power density of the system is large FR-F720-15K PDF.
Although the technology is not yet mature, but still attract a large number of scholars in-depth study.
In fact, the quality is not the indirect control current, flux, but the torque is directly used as the control to achieve. MITSUBISHI inverter FR-F740 series.
Voltage level: three phase 400V MITSUBISHI TECHNICAL MANUAL.
Frequency converter capacity: 160KW.
Frequency converter common frequency of a given way: the operator keyboard is given, the contact signal given, analog signal given, the pulse signal given and communication methods given, etc..
These frequencies have their advantages and disadvantages, and should be selected according to the actual needs MITSUBISHI TECHNICAL MANUAL.
Frequency converter is a power control device which uses the power of the power semiconductor device to change the power frequency to another frequency,
Can realize the asynchronous motor soft start, variable frequency speed regulation, improve the operation precision, change the power factor, over current / over voltage / overload protection and other functions MITSUBISHI TECHNICAL MANUAL FR-F720-15K TECHNICAL MANUAL. Power: 7.5kw.
VVoltage: 200V FR-F720-15K Manual .
The surge voltage of the motor can be suppressed when the 400V motor is driven by a frequency converter.
Motor suitable for 5.5 to 37kW.