"MITSUBISHI inverter FR-E720S series.
Voltage level: single phase 200V.
Frequency converter capacity: 1.5KW.
The use of frequency converter motor is in order to speed, and reduce the starting current.
In order to produce a variable voltage and frequency, the device is the first power of the AC power conversion to DC (DC), the process is called rectification FX2N-422-BD  User's Manual.
The direct current (DC) is transformed into alternating current (AC) and its scientific term is "inverter" (inverter) FX2N-422-BD 
General inverter is the DC power supply inverter for a certain fixed frequency and a certain voltage of the inverter.
For the inverter as the frequency adjustable, adjustable voltage inverter, we called the inverter.
Inverter output waveform is simulated sine wave, mainly used in three-phase asynchronous motor speed control, and also called frequency governor FX2N-422-BD  User's Manual. "Input and output points: 16 points.
Input points: 8 points.
Input specification: leakage type.
Output points: 8 points.
Output form: transistor output (drain).
Power consumption: 6W.
Weight: 0.2KG.
Outline dimension: 34x90x87mm.
Hard and compact type third generation micro programmable controller FX2N-422-BD  User's Manual.
Connector type input and output type provincial connection.
Greatly strengthened the industry''s highest level of high-speed processing and positioning and other built-in features.
High cost of the province space models.
FX3UC in the province of space, the province also greatly strengthened the connection of high-speed processing and positioning and other built-in features.
The host is built in DC24V power supply, the connector input and output form of the transistor output.
In addition, according to the product mix can also achieve network communications, analog control, data collection and other functions.
Third generation high function micro programmable controller.
Connector type can save space, province wiring.
Built in high speed processing and positioning.
Ultra small size, control points to 256 points.
Construction of CC-Link remote I/O 384 points. "Power: 30kw.
Voltage: 400V.
Brake resistor, a kind of ripple resistance, is mainly used in the mechanical system of the inverter to control the speed of the motor,
Help the motor to be converted into heat energy due to the regenerative power of the motor.

Braking unit principle: the brake unit is composed of a high power transistor GTR and its driving circuit FX2N-422-BD  Manual.
Its function is to link the discharge current braking resistor capacitor voltage or not in the range of the time connsumed and the DC part "overpressure",
Need to add external braking components, in order to speed up the speed of the consumption of renewable energy FX2N-422-BD  Manual. "