YASKAWA SGD7S-xxxDA0 series Product Manual page 129

5.3 SERVOPACK Models without a Built-In Dynamic Brake
5.3.2 Selecting the Devices Required for the Dynamic Brake Circuit
 Linear Servomotors
Energy consumption of Dynamic Brake Resistor:
Moving Coil mass:
Load mass:
Movement speed before dynamic braking: V [m/s]
= 1/2 × (
E
DB
Note: Refer to the catalog or product manual of the Servomotor for details on Moving Coil mass.
 Specifications of the Dynamic Brake Resistor
Have the following specifications ready when purchasing the Dynamic Brake Resistor. In the
blank cells of the table, write down the specifications of the Dynamic Brake Resistor that you
are considering for purchase, and confirm these specifications with the manufacturer of the
Resistor.
Resistance (Ω)
Energy consumption of resistor from dynamic braking (J)*
Number of operations of the dynamic brake
(Number of times the dynamic brake will be used in the
service life of the machine (reference data))
Wire size
*
SGD7S-210D to 370D SERVOPACKs require three Dynamic Brake Resistors. Therefore, the energy consump-
tion required for one resistor will be one-third of the electrical energy that was calculated from the kinetic energy of
the Servomotor.
Selecting the Magnetic Contactor and Relay
The following table gives the Magnetic Contactor and relay that must be used to create the
dynamic brake circuit.
SERVOPACK Model
210D, 260D, 280D, and
5-14
[kg]
M
M
[kg]
M
L
) × V 2
+
M M
M L
Item
SGD7S-
Magnetic Contactor
Relay
370D
Surge Absorber
[J]
E
DB
AWG14 (2.0 mm
Part Manufacturer
Mitsubishi Electric Cor-
poration
OMRON Corporation
Panasonic Corporation
Okaya Electric Indus-
tries Co., Ltd.
Specification
2 2
) to AWG18 (0.9 mm )
Manufacturer Model No.
BD-N65 (24 VDC)
G6B-4BND
ERZV09D390
XEB01010