[DG2CP1]

Features

• When an instantaneous power failure occurs, the main circuit’s power failure tolerance time is secured by supplying energy from the auxiliary capacitor. This enables normal stopping.

• Heat generated in the cabinet can be reduced by reducing the dissipation of regeneration heat.

• When an external regenerative resistor is also installed, the resistor capacity can be reduced. Thus, the cabinet can be downsized.

• The auxiliary capacitor unit can be easily added to an existing system. Just connect a 200VAC power supply and connect to the servo amplifier’s P/N terminals to use.

MR-J4(200V class, 1kW or less)

Securing power failure tolerance timeduring instantaneous power failure, and

Reducing the dissipation of regeneration heatby using regenerative energy charged in the capacitor

Power running

Con

vert

er

Servo motor

Acceleration

Con

vert

er

Capacitor

EnergySmall

Servo amplifier

Chargingenergy supply

Capacitor

Inve

rter

Auxiliary capacitor unit

Regeneration

Servo amplifier

Decelerationenergy charging

Con

vert

er

Servo motor

Deceleration

Con

vert

er

Capacitor

Capacitor

Inve

rter

Auxiliary capacitor unit

DG2CP1DG2CP1

Drive GoodsAuxiliary Capacitor Unit for Drive Amplifier

New Product Release No.4

Proposing Measures for Instanta-neous Power Failure and Heating Prevention for MR-J4 Servo System by using deceleration energy charging

Before and after Introduction of Unit

Operation atinstantaneous power failure

Operation when auxiliarycapacitor unit is connected

Motor speed3000 [r/min]

Bus voltage when axis stops200VDC

Bus voltage when axis stops200VDC

Initial bus voltage290VDC

Power failure tolerance time is secured

Axis stopPower failure occurs

Undervoltage alarm occurs

Power failure occurs

4600ms

Axis stop

730ms

Motor speed3000 [r/min]

Initial bus voltage290VDC

Instantaneous

power failure

measures

Note) The power failure tolerance time varies depending on the motor load at the time of power failure

Very Frequent Operation before and after Introduction of Unit

Power running Regeneration

Power running Regeneration

Servo amplifier

Capacitor

Regenerativeresistor

Servo motor

EnergyLarge

Acceleration

Servo motor

Acceleration

Capacitor

Energysmall

Servo amplifier

Servo amplifier Servo amplifier

Capacitor

Regenerativeresistor

Servo motor

Deceleration

Dissipation of deceleration energy heat(Heat dissipation area is required in cabinet)

Charging energy supply Deceleration energy charging

Capacitor

Auxiliary capacitor unit

Servo motor

Deceleration

Con

vert

er

Capacitor

Capacitor

Auxiliary capacitor unit

Heat reduction

Power running

Motor speed

AccelerationAcceleration DecelerationDeceleration

Motor energy Time

TimeRegenerationRegeneration

The regenerative energy is chargedin the capacitor and used for the

next power running (acceleration).

Very frequent operation using regenerative resistor

Very frequent operation using auxiliary capacitor unit

Con

vert

er

Inve

rter

Con

vert

er

Inve

rter

Con

vert

erC

onve

rter

Inve

rter

Con

vert

er

Inve

rter

Auxiliary Capacitor Unit for Drive Amplifier

Confirmation of Effect

<System Configuration (Example)>

Capacity selected for above operation

Servo amplifier: MR-J4-70_

Servo motor: HG-KR73

Load inertia ratio: 10 times

Operation frequency: 46 [SPM]

(1) Regenerative power: 38 [W] 0 [W] (No heat is generated by the regenerative resistor.)

(2) External regenerative option: MR-RB12 (100 [W]) An external regenerative option is not required.

(3) Energy-saving effect: An energy-saving effect of 7,500 [yen/year] can be achieved.

When calculated with the following conditions:

24 hr, 365 day operation, electricity rate: \15 yen/kWh

Effect of charging with capacitor unit: 74J/cycle, 1 cycle operation time: 1.334sec

MalfunctionRA1

OFF

Emergency stop switch

Auxiliary capacitor unit

MCCB

3-phase200VAC

ON

MC SK

MC

MC*6 CNP1

CNP2

CNP1

CNP2

CN1

CN1

EM2

SON

DICOM

ALM

DICOM

CN8

CN2*10

CNP3*10

Servo amplifierServo motor

TE1

L1

L1

U U

V

WM

V

W

L2

L3

N-

P3

P4

THM1

P+

P+

P+

Insulated

Forced stop 2

Main circuitpower supply*7

Servo ON

C

D

L11

L21

N-

N-

THM2

L2

L3

Encodercable*3

24VDC*11

24VDC*11

Encoder

Malfunction

Short-circuit connector(Packed with servo amplifier)

RA1

*4

*2

*5

*1

*1

*9

Motor

*8

Standard Connection Diagram

*1: Remove the short bar connected across P3 and P4 to connect. When using the power factor improving DC reactor, connect to the section *1 . The power factor improving DC reactor

and power factor improving AC reactor cannot be used simultaneously.

*2: Always connect across P+ and D (factory-wired). When using the regenerative option, refer to the Servo Amplifier Instruction Manual.

*3: For the encoder cable, use of the option cable is recommended. Refer to “Servo Motor Instruction Manual (Vol. 3)” for details on selecting cable.

*4: This diagram is for sink I/O interface. Refer to the Instruction Manual for details on the source I/O interface.

*5: Refer to “Servo Motor Instruction Manual (Vol. 3)” for details on connecting servo motor power wires.

*6: Use a magnetic contactor with an operation delay time (interval between current being applied to the coil until closure of contacts) of 80ms or less.

Depending on the main circuit voltage and operation pattern, bus voltage decreases, and that may cause the forced stop deceleration to shift to the dynamic brake deceleration.

When dynamic brake deceleration is not required, delay the time to turn off the magnetic contactor.

*7: To prevent an unexpected restart of the servo amplifier, configure a circuit to turn off EM2 when the main circuit power supply is turned off.

*8: When not using the STO function, attach the short-circuit connector came with a servo amplifier.

*9: When wires used for L11 and L21 are thinner than wires used for L1, L2, and L3, use a molded-case circuit breaker.

*10: Connecting a servo motor of the wrong axis to U, V, W, or CN2 of the servo amplifier may cause a malfunction.

*11: The illustration of the 24VDC power supply is divided between input signal and output signal for convenience. However, they can be configured by one.

Auxiliary Capacitor Unit for Drive Amplifier

Product Appearance, External Dimensions, and Name of Each Part

Auxiliary Capacitor Unit Specifications

(1) General specificationsItem Environment

Ambient

temperature

Ambient

humidity

Ambience

Altitude

Vibration resistance

Operation

Storage

Operation

Storage

0°C to 55°C (with no freezing)

-20°C to 65°C (with no freezing)

90%RH or less (with no condensation)

Indoors (no direct sunlight), free from corrosive

gas, flammable gas, oil mist, dust, and dirt

1000m or less above sea level

5.9m/s2, 10Hz to 55Hz (in each X, Y and Z direction)

(2) Performance specificationsItem Specifications

Connected servo amplifier

Main circuit

Control circuit power input

Protective function

Compliance to international standards

Structure (IP rating)

External dimensions (mm)

Mass (g)

Power/frequency

Permissible voltage fluctuation

Permissible frequency fluctuation

Voltage

MR-J4 series*1

3-phase 200 to 240VAC, 50Hz/60Hz*2

3-phase 170 to 264VAC*2

Within ±5%

1-phase 200VAC

Converter overheat detection

CE, UL/cUL

Natural cooling, release (IP20)

168(H)×45(W)×157.8(D)

250*1: Cannot be connected to MR-J4W2-B or MR-J4W3-B.

*2: A voltage of 220VAC or less is recommended to adequately store regenerative energy.

No. Name Symbol Function(1)

(2)

(3)

(4)

Main circuit power connector

Bus connection connector

Main circuit heating

detection connector

Charge lamp

CNP1

CNP2

TE1

CHARGE

Inputs 200VAC power supply.

Connect to the servo amplifier.

Changes to “OPEN” when main

circuit heating is detected.

Lights up when the main circuit is

charged. While this lamp is lit, do

not reconnect the cables.

Product Model

Item Model Description

Capacitor unit for storing regenerative energyDG2CP1Auxiliary capacitor unit for drive amplifier

157.8

154.5

156

168

(3)

(2)

(1)

(4)

45

1-13-5, Kudankita, Chiyoda-ku, Tokyo, 102-0073, Japan Phone +81-3-3288-1101 Fax +81-3-3288-1507

Before using this product, ensure the safety in case of failure.We shall not bear any responsibility for consequential damages caused by failure of the product.

MEI C118E·164 (1605) MEENew publication, effective May. 2016

Specifications subject to change without notice.

Unit: mm