Servo – Brake Resistors

Brake Resistors for MR-J3

During deceleration, because the servo motor rotates by the load inertia of the drive mechanism, it functions as a generator and electric power returns to the servo amplifier.

The regenerative resistor absorbs this electric power, and functions as a brake (called a regenerative brake.) The regenerative brake is required to prevent regenerative over voltage in the servo amplifier when the load inertia is large and the operation is frequently performed.

The regenerative resistor is required when the regenerative power generation quantity during deceleration exceeds the allowable regenerative electric power of the servo amplifier.


European and Japanese part number for external break resister differs. This guide show a comparison between the Japanese part numbers shown in the manuals to the available parts in Europe.

Brake resistor

200 volt Amplifers

MR-J3 Brake resistors(Japan type)   Brake resistors
(MEU type)
MR-J3-10
to
MR-J3-100		 MR-RB032 <=> MR-RFH75-40
MR-J3-20
to
MR-J3-100		 MR-RB12 <=> MR-RFH75-40
MR-J3-70
to
MR-J3-100		 MR-RB32 <=> MR-RFH220-40
MR-J3-200
to
MR-J3-350		 MR-RB30 <=> MR-RFH400-13
MR-J3-200
to
MR-J3-350		 MR-RB50 <=> MR-RFH400-13
MR-J3-500
to
MR-J3-700		 MR-RB31 <=> MR-RFH400-6.7
MR-J3-500
to
MR-J3-700		 MR-RB51 <=> MR-RFH400-6.7

Brake resistor

400 volt Amplifers

MR-J3 Brakeresistors

(Japan type)

   Brake resistors
(MEU type)
MR-J3-60_4
to

MR-J3-100_4

 MR-RB1H-4 <=>  MR-PWR-T-400-120
MR- J3-60_4
to

MR-J3-100_4

 MR-RB3M-4 <=> MR-PWR-T-400-120
MR-J3-200_4
to
MR-J3-350_4		 MR-RB3G-4 <=> MR-PWR-T-600-47
MR-J3-200_4
to
MR-J3-350_4		 MR-RB5G-4 <=> MR-PWR-T-600-47
MR J3-500_4
to
MR-J3-700_4		 MR-RB34-4 <=> MR-PWR-T-600-26
MR- J3-500_4
to
MR-J3-700_4		 MR-RB54-4 <=> MR-PWR-T-600-26

 

Click here to download MR-J2S – MR-J3 – MR-ES Brake resistors data