Hitachi L100 사용자 설명서

L100 Inverter

Getting Star

ted

The maximum available inverter current output is limited by the carrier frequency and 
ambient temperature. The carrier frequency is the inverter’s internal power switching 
frequency, settable from 0.5 kHz to 16 kHz. Choosing a higher carrier frequency tends to 
decrease audible noise, but it also increases the internal heating of the inverter, thus 
decreasing (derating) the maximum current output capability. Ambient temperature is 
the temperature just outside the inverter housing—such as inside the control cabinet 
where the inverter is mounted. A higher ambient temperature decreases (derates) the 
inverter’s maximum current output capacity.

Use the following derating curves to help determine the optimal carrier frequency setting 
for your inverter, and to find the output current derating. Be sure to use the proper curve 
for your particular L100 inverter model number.

0.5

2

4

6

8

10

12

14

16

70%

80%

90%

100%

95%

85%

75%

% of rated 

output current

Carrier frequency

kHz

0.5

2

4

6

8

10

12

14

16

70%

80%

90%

100%

95%

85%

75%

% of rated 

output current

Carrier frequency

kHz

Standard ratings at 40°C

Ratings at 50°C max. with top cover removed

Ratings at 55°C max. with top cover removed