Regeneration Methods - Mitsubishi MELDAS HS Series Specifications And Instruction Manual

11-1-2 Regeneration methods

When the servomotor decelerates, rotating load inertia or the operation energy of the moving object
is returned to the servo amplifier through the servomotor as electrical power. This is called
"regeneration". The three general methods of processing regeneration energy are shown below.
Regeneration method
1. Condenser regeneration
method
2. Resistance regeneration
method
3. Power supply
regeneration method
The intelligent servomotor uses the capacity regeneration method and resistor regeneration method.
The motors other than the HS-F23 are provided with the regenerative resistor. With the normal
amplifier, if the regenerative capacity increases, the optional regenerative resistor is connected
outside of the amplifier. However, with the intelligent servomotor, the optional regenerative resistor
cannot be connected.
If the regeneration frequency exceeds the specifications, consider using the MDS-B-SVJ2, or the
power regeneration type MDS-B-V1/V2 + MDS-B-CV Series.
POINT
Chapter 11 Selection
Table 11-2 Servo amplifier regeneration methods
This is a regeneration method for small-capacity amplifiers. The
regeneration energy is charged to the condenser in the amplifier,
and this energy is used during the next acceleration.
The regeneration capacity decreases as the power supply voltage
becomes higher.
If the condenser voltage rises too high when regenerating with the
condenser only, the regenerative electrical power is consumed
using the resistance. If the regeneration energy is small, it will only
be charged to the condenser. Because regeneration energy
becomes heat due to resistance, heat radiation must be considered.
In large capacity servo amplifiers the regenerative resistance
becomes large and this is not practical.
This is a method to return the regeneration energy to the power
supply. The regeneration energy does not become heat as in
regenerative resistance. (Heat is generated due to regeneration
efficiency problems.)
The circuit becomes complicated, but in large capacity servo
amplifiers having large regeneration capacity this method is more
advantageous than resistance regeneration.
The HS-MF23EX uses capacitor regeneration. The regenerative resistor is not
provided.
Explanation
11–3