Pre-Operation Instructions; Features Of Fr-Xc Series Converters; Common Bus Regeneration Mode; Power Regeneration Mode - Mitsubishi Electric FR-XC-18.5K-PWM Instruction Manual

Pre-operation instructions

1.1
Pre-operation instructions
Incorrect handling may cause the equipment to operate improperly or reduce its life considerably. Also, incorrect handling may
damage the FR-XC series converter and the inverter. Please handle the unit properly in accordance with the information on
each section as well as the precautions and instructions of the Instruction Manual.
1.1.1

Features of FR-XC series converters

NOTE
• It is not a fault if noise comes from the dedicated reactor during regenerative driving of the converter (in other words, it is a
fault if noise comes despite the stop state of the converter by the Converter stop (SOF) signal).
• If needed, devise methods of reducing noise by modifying the enclosure in which the reactor is installed.
Common bus regeneration mode
Enables continuous regenerative operation at 100% torque. This mode
supports continuous regenerative operations including line operation.
When the converter is connected to multiple inverters, regeneration
energy from an inverter is used for the other inverters. (The FR-XC series
converter can be used as a common converter.) Excessive energy is
returned to the power supply, saving on the energy consumption.
Use the FR-XC series converter in combination with the FR-XCL,
dedicated stand-alone reactor (option).
NOTE
• Note that the applicable inverter capacity and current are different if using the FR-XC-(H)18.5K-PWM or FR-XC-(H)22K-PWM
converter with its harmonic suppression function disabled. (Refer to
Power regeneration mode
For power driving, the converter section of inverter unit supplies power, and
for regenerative driving, the FR-XC series converter returns power to the
power supply. (The FR-XC series converter cannot be used as a common
converter.)
Since the capacity of power regeneration converter is selectable according to
the regenerative power, the compact and inexpensive power regeneration
converter is applicable when the regenerative power is smaller than the
inverter capacity.
Use the FR-XC series converter in combination with the FR-XCL, dedicated
stand-alone reactor (option).
NOTE
• When installing the converter in a common bus system, do not use the converter in the power regeneration mode.
8
OUTLINE
Power supply FR-XCL FR-XC
page 156.)
AC reactor
Power supply
(FR-HAL)
Inverter Motor
M
Inverter Motor
M
Inverter Motor
M
FR-XCL
FR-XC