Delta Tau TURBO CLIPPER DRIVE User Manual
Turbo Clipper Drive User Manual
Motor Setup Guidelines
62
I2T Protection, Magnetization Current: Ixx57, Ixx58, Ixx69, Ixx77
The lower values (tighter specifications) of the Continuous/Instantaneous current ratings between
the Turbo Clipper Drive and motor are chosen to setup I2T protection.
the Turbo Clipper Drive and motor are chosen to setup I2T protection.
If the peak current limit chosen is that of the Turbo Clipper Drive (15 Amps) then the time
allowed at peak current is set to 2 seconds.
allowed at peak current is set to 2 seconds.
If the peak current limit chosen is that of the Motor, check the motor specifications for time
allowed at peak current.
Examples:
allowed at peak current.
Examples:
For setting up I2T on a Turbo Clipper Drive driving a 3/9-Amp motor, 3 amps continuous
and 9 amps instantaneous will be used as current limits. And time allowed at peak is that
of the motor.
and 9 amps instantaneous will be used as current limits. And time allowed at peak is that
of the motor.
For setting up I2T on a Turbo Clipper Drive driving a 4/16-Amp motor, 4 amps
continuous and 15 amps instantaneous will be used as current limits. And time allowed at
peak is 2 seconds.
continuous and 15 amps instantaneous will be used as current limits. And time allowed at
peak is 2 seconds.
The rule of thumb for Stepper magnetization current is Ixx77 = Ixx57/√2
Motors 1 thru 4 have 5-amp continuous, 15-amp peak current limits. With a servo clock of 8
KHz, I2T protection and magnetization current would be set to:
#define ContCurrent
5
; Continuous Current Limit [Amps] –User Input
#define PeakCurrent
15
; Instantaneous Current Limit [Amps] –User Input
#define MaxADC
33.85 ; Turbo Clipper Drive full range ADC reading (electrical
specifications)
;#define ServoClk
;#define ServoClk
P7003 ; [KHz] Computed in Dominant Clock Settings Section
#define I2TOnTime
2
; Time allowed at peak Current [sec]
#define VoltOutLimit P7007 ; This is Ixx69 normally used in direct digital PWM
I157=INT(32767*(ContCurrent*1.414/MaxADC)*cos(30))
I177=I157/SQRT(2)
VoltOutLimit=INT(32767*(PeakCurrent*1.414/MaxADC)*cos(30))
I158=INT((VoltOutLimit*VoltOutLimit-I157*I157)*ServoClk*1000*I2TOnTime/(32767*32767))
I257=I157
I157=INT(32767*(ContCurrent*1.414/MaxADC)*cos(30))
I177=I157/SQRT(2)
VoltOutLimit=INT(32767*(PeakCurrent*1.414/MaxADC)*cos(30))
I158=INT((VoltOutLimit*VoltOutLimit-I157*I157)*ServoClk*1000*I2TOnTime/(32767*32767))
I257=I157
I277=I177
I258=I158
I357=I157
I377=I177
I358=I158
I457=I157
I477=I177
I458=I158
Note
Software I2T is handled by Turbo PMAC. The Turbo Clipper
Drive has a built-in hardware I2T protection as an additional
layer of safety.
Drive has a built-in hardware I2T protection as an additional
layer of safety.