YASKAWA CPCR-MR08C Bulletin page 14

1 4.3 Servomotor Frequency SPEED
• (r/rain)
In the servo drive consisting of Servopack and
RATED
[_________
servomotor, motor speed amplitude is restricted SPEED (+) .......,
2500 TO
',
by the maximum armature current controlled by
4000*
i
Servopack.
(a)Combination of SERVOPACK
and Print Motor
l T I I
--6--4--'2,_0 2 4 6
The relation between motor speed amplitude (N)
and frequency(f )is shown by the formula below:
/ ] INPUT VOLTAGE (V)
/ I
_X Kt X IR Jr/mini L/_
.....
_ RATED SPEED (--)
N = 1.52 (J'_w+ .]L ) f _ --2500TO 4000*
Fig. 1.14 shows servomotor frequency of Hi- "varies depending on motor type.
Cup Motor type UGHMED-12AA. The values in I
Fig. 1.14 are measured when operating motor at SPEED 17501
no load.
When JL is equal to JM , the speed is half
(r/rain) i000_/ :
of the value in the figure. When JL is twice of JM , (b)Combination of SERVOPACK
the speed is one-third of the value in the figure, andCupMotor i 1 c )t I ! I I
--6--4--2/10 2
4
6
! / I INPUT VOLTAGE (V)
MOTOR
ARMATURE
t CURRENT
SPEED'000 --//----Yi
(r/min) l / ;
MOTOR (C)
Combination of SERVOPACK 5oo-1- /
t SPEED and Minertia Motor J Series
or Hi-CupMotor i i i Y i I r
--6--4--2/10 2 4 6
Fig. 1.13 Timing Chart of _ / IINPUT VOLTAGE (V)
Meter Armature Current and Speed i/ 1- 5o0 -
_---- ---1-_1000
100G
MOTOR 10(] _
Ip=300% SPEED 3000 -------_. ....
SPEED N (r/rain) 2000-_ / i
(r/rain) Ip=200%
/p=lOOO/o (d) Combination of SERVOPACK
lc and MinertiaMotor looo_
/ i
/
I
StandardSeries _ _ t_ : _
--6_--4--2J--4--2 0 2 4 6
1 , i _ /i / ---1000 INPUT VOLTAGE (V)
• 0 3 1_0 30 100 ---2000
FREQUENCY f (Hz) il______ _ --3000
Fig. 1.14 Servomotor Frequency
of Hi-Cup Motor Type UGHMED-12AA
Fig. 1.15 Speed--Input Voltage Characteristics
Adjustable with
1.4.4 Speed-Input Voltage
Characteristic RATED SPEED (+) -_,_ _/_--_1- ', .... I
Fig. I. 15 shows motor speed and input voltage /_<_///" i
curve when speed reference input terminals ICN-
(_)and (_) are used. -'10J8-_s-'4-_2 4 6 8 _0
I
When the auxiliary input terminals (_) and _)
_ / INPUT
VOLTAGE (V)
',' _l_
are used, by adjusting Servopack [FN2_, the
, I
rated speed can be obtained by input voltages RATED SPEED(--)
of --+2 to + 10 V (Fig. 1.16).
The forward motor rotation (+) means counter-
clockwise rotation when viewed from the drive
Fig. 1.16 Speed--Input Voltage Characteristic
end (Forward motor rotation is given by connec- when Auxiliary Input Terminal
tion as shwon in Figs. 2.1 to 2.5.) (_) and (_) are used.
12