Patent ID: 11967880
Assignee: DAIKIN INDUSTRIES, LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  F  Y | IPC H

Claim 3:
4. The power supply circuit of claim 2, wherein
the control unit is configured to perform control by
comparing a first command value with a value of a first carrier wave that has a triangular waveform with an amplitude A and a minimum value M to
turn on the first lower-arm switching element when the first command value is equal to or more than the value of the first carrier wave or
turn off the first lower-arm switching element when the first command value falls below the value of the first carrier wave,

comparing the first command value with a value; of a second carrier wave that has an amplitude A and a maximum value NI and is always 2M when added up with the first carrier wave to
turn on the second upper-arm switching element when the first command value is equal to or more than the value of the second carrier wave or
turn off the second upper-arm switching element when the first command value falls below the value of the second carrier wave,

comparing a second command value with a value of a third carrier wave that has a triangular waveform with an amplitude A and a minimum value M to
turn on the first upper-arm switching element when the second command value is equal to or more than the value of the third carrier wave or
turn off the first upper-arm switching element when the second command value falls below the value of the third carrier wave, and

comparing the second command value with a value of a fourth carrier wave that has an amplitude A and a maximum value NI and is always 2M when added up with the third carrier wave to
turn on the third lower-arm switching element when the second command value is equal to or more than the value of the fourth carrier wave or
turn off the third lower-arm switching element when the second command value falls below the value of the fourth carrier wave.