1 Outline
Outline of Product
The high power factor PWM converter with power
regenerative function, the RHC-D series is used in
combination with a Fuji inverter to return the
regenerative energy generated on the load side to the
power source, improving the regenerating performance
and saving energy.
The converter shapes an input current waveform into a
sinusoidal waveform to enable driving at a power factor
of almost 1 so that it is possible to reduce the capacity
of the power supply equipment.
As well, the converter is useful for the replacement of
conventional applications using braking resistors, such
as cranes and vertical transfer machines and it is
compliant with the "Guideline for Suppressing
Harmonics by Customers Receiving High Voltage or
Special High Voltage" (conversion coefficient Ki = 0).
With simplified operation, it is possible to monitor the
input power supply, current, power, and load factor,
configure function codes, and check alarm history.
Various communications options provided allow you to
monitor data from a remote site easily or to integrate
the converter in the customer's system without
difficulty.
The converter also applies to large capacity,
low-voltage inverters by controlling sharing of load to
the inverter uniformly with the parallel connection
option and input transformer.
Guideline for Suppressing Harmonics
The PWM control regulates the power supply current
into a sinusoidal wave to contribute to substantial
reduction of harmonic currents.
Accordingly, the combination with an inverter can
handle the conversion coefficient Ki (specified in the
"Guideline for Suppressing Harmonics by Customers
Receiving High Voltage or Special High Voltage" issued
by the Ministry of Economy, Trade and Industry) as "0"
(that is, no generation of harmonics).
Possible to Reduce the Capacity of Power
Supply
By controlling the power factor, the converter supplies
the in-phase current relative to the power phase voltage,
enabling running at a power factor of almost 1. This
makes it possible to reduce the capacity of the power
transformer or the size of the devices to less than those
of the standard inverters.
Substantial Increase of Braking
Performance
The regenerative energy obtained in frequent
acceleration/deceleration operation or elevator returns
to the power supply side, promoting energy savings.
Since the waveform of the regenerative current is
sinusoidal wave, too, there is no need to be anxious
about trouble in the power supply system.
MD mode
LD mode
Continuous
regeneration
100%
100%
Short time rating
1 min. 150%
1 min. 110%
Variety of Assured Functions
• Monitors the source voltage, current, power, power
supply frequency and other trends.
• Provides three choices of languages (Japanese,
English and Chinese) to be displayed on the panel.
• Saves the converter load factor calculated,
cumulative run time, and data at the occurrence of
alarm into the memory.
• Issues overload and converter overheat early warning
signals before the converter stops due to an alarm.
• Shuts down the gate output at the time of a
momentary power failure and restarts operation
immediately after the power is restored.
• Supports various communications protocols (T-Link,
SX bus, CC-Link and RS-485)
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