10.07.2015 Views

Sigma-II Series SGM*H/SGDH USER'S MANUAL - Esco Drives ...

Sigma-II Series SGM*H/SGDH USER'S MANUAL - Esco Drives ...

Sigma-II Series SGM*H/SGDH USER'S MANUAL - Esco Drives ...

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11.1 Servomotor Capacity Selection Examples11.1.3 Calculating the Required Capacity of Regenerative ResistorsVoltage(1) Simple CalculationWhen driving a servomotor with the horizontal axis, check the external regenerative resistor requirements usingthe calculation method shown below.(a) SERVOPACKs with Capacities of 400 W or LessSERVOPACKs with capacities of 400 W or less do not have built-in regenerative resistors. The energy thatcan be charged with capacitors is shown in the following table. If the rotational energy in the servomotorexceeds these values, then connect an external regenerative resistor.Applicable SERVO-PACKsRegenerativeEnergy that Canbe Processed(joules)Calculate the rotational energy E s in the servomotor from the following equation:E S = J × (N M ) 2 /182 (joules)• J = J M + J L• J M : Servomotor rotor moment of inertia (kg·m 2 )• J L : Load converted to shaft moment of inertia (kg·m 2 )• N M : Rotation speed used by servomotor (min -1 )Remarks100 V <strong>SGDH</strong>-A3BE 7.8 Value when main circuit input voltage is 100 VAC<strong>SGDH</strong>-A5BE to -02BE 15.7200 V <strong>SGDH</strong>-A3AE, -A5AE 18.5 Value when main circuit input voltage is 200 VAC<strong>SGDH</strong>-01AE to -04AE 37.11111-7

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