MAWA-050A
1. Overview
1-10
(3) -3. Duty cycle graph
(Ambient temperature: 40°C)
* The duty cycle is the ratio (in percent) of load time for the total time.
Duty cycle X (%) = (weld time of the 1st w the 2nd welding T
weld
) / weld cycle T
cycle
× 100
In this product, a period of 10 minutes of the total time of “JIS C9300-1 3.37” is not adopted.
Also, the duty cycle changes depending on the set time of the 1st w the 2nd welding.
Example computation)
When weld time of the 1st w the 2nd welding T
weld
= 800 ms and weld cycle T
cycle
= 4000
ms
Duty cycle X (%) = (weld time of the 1st w the 2nd welding T
weld
) / weld cycle T
cycle
× 100
= 800 ms / 4000 ms × 100 = 20%
In this case, weld time 1 sec. or less is adopted. According to the duty cycle graph for weld time 1
sec., up to welding current 28 A is available.
5.5% (50A)
10% (38A)
20% (28A)
30% (21A)
40% (16A)
50% (12A)
5%
(50A)
10% (32A)
20% (22A)
30% (16A)
40% (13A)
50% (10A)
Weld time: 4 sec.
Weld time: 1 sec.
Current [A]
Duty cycle [%]
