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carrier frequency

1/22/2015 8:47 AM	Rate (0)
hamid rad Posts: 41 Rating: (8)	hi there how may i understand the rise time of inverter carrier frequency? how much is this on sinamic S120 with different carrier (1, 2 and 4 KHz)? thank a lot
hamid rad Posts: 41 Rating: (8)
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1/26/2015 6:01 AM	Rate (0)
Gennadiy Posts: 29 Rating: (1)	Hi Hamid, where did you find this term?
Gennadiy Posts: 29 Rating: (1)
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1/26/2015 10:06 AM	Rate (0)
hamid rad Posts: 41 Rating: (8)	it from nema standard MG1 part 30. as follow" "30.2.2.8 Voltage Stress The exact quantitative effects of peak voltage and rise time on motor insulation are not fully understood. It can be assumed that when the motor is operated under usual service conditions (14.2 or 20.28.2) there will be no significant reduction in service life due to voltage stress, if the following voltage limit values at the motor terminals are observed. Motors with base rating voltage Vrated>600 volts: Vpeak <=1kV Rise time >=2 uS "
hamid rad Posts: 41 Rating: (8)
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