Bose MR-J2S- B Options And Auxiliary Equipment, a. Regenerative energy calculation

12.OPTIONS AND AUXILIARY EQUIPMENT

(b)To make selection according to regenerative energy

Use the following method when regeneration occurs continuously in vertical motion applications or when it is desired to make an in-depth selection of the regenerative brake option:

a. Regenerative energy calculation

Use the following table to calculate the regenerative energy.

M

Friction torque

TF

TU

Unbalance torque

Servomotorspeed
(	)
Generatedtorque
(	)

	tf(1 cycle)
	No
Up
		Down	Time
t1	t2	t3	t4
Tpsa1	Tpsd1	Tpsa2	Tpsd2

1)

(Driving)
2)	4)	5)	8)
			6)
3)			7)
(Regenerative)

Formulas for calculating torque and energy in operation

Regenerative power

Torque applied to servo motor [N m]

Energy [J]

1)

T1

(JL

JM) No

1

TU

TF

E1

0.1047

No

T1

Tpsa1

104

Tpsa1

2

9.55

2)

T2

TU

TF

E2

0.1047 No T2 t1

3)

T3

(JL

JM) No

1

TU

TF

E3

0.1047

No

T3

Tpsd1

104

Tpsd1

2

9.55

4), 8)

T4

TU

E4

0 (No regeneration)

5)

T5

(JL

JM) No

1

TU

TF

E5

0.1047

No

T5

Tpsa2

104

Tpsa2

2

9.55

6)

T6

TU

TF

E6

0.1047

No T6

t3

7)

T7

(JL

JM) No

1

TU

TF

E7

0.1047

No

T7

Tpsd2

104

Tpsd2

2

9.55

Sum total of regenerative energies

Sum total of negative energies in 1) to 8)

b. Losses of servo motor and servo amplifier in regenerative mode

The following table lists the efficiencies and other data of the servo motor and servo amplifier in the regenerative mode.

Servo amplifier	Inverse efficiency[%]	Capacitor charging[J]
MR-J2S-10B(1)	55	9
MR-J2S-20B(1)	70	9
MR-J2S-40B(1)	85	11
MR-J2S-60B	85	11
MR-J2S-70B	80	18
MR-J2S-100B	80	18
MR-J2S-200B	85	40
MR-J2S-350B	85	40
MR-J2S-500B	90	45
MR-J2S-700B	90	70

Inverse efficiency ( )	:Efficiency including some efficiencies of the servo motor and servo
	amplifier when rated (regenerative) torque is generated at rated speed.
	Since the efficiency varies with the speed and generated torque, allow for
	about 10%.
Capacitor charging (Ec)	:Energy charged into the electrolytic capacitor in the servo amplifier.
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