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发明公开
CN103222179A 电力变换装置 有权

电力变换装置
摘要：
本发明是能够减少开关次数的电力变换装置。载波生成部在第1期间（T10）和第2期间（T10）中的至少任意一方中，对开关控制部提供单调减小的载波（C1），在第3期间（T13）和第4期间（T13）中的至少任意一方中，对开关控制部提供单调增大的载波（C2），其中，第1期间是电压指令值（V**）为载波的最小值以下的值的期间的后一个期间，在该第1期间中电压指令值取比载波的最小值大的第1规定值，第2期间是电压指令值为最大值以上的期间的前一个期间，在该第2期间中电压指令值取比最大值小的第2规定值，第3期间是电压指令值为所述最大值以上的值的期间的后一个期间，在该第3期间中电压指令值取比最大值小的第3规定值，第4期间是电压指令值为最小值以下的期间的前一个期间，在该第4期间中电压指令值取比最小值大的第4规定值。
摘要（英）：

Provided in the present invention is a power conversion apparatus wherein the number of times of switching can be reduced. A carrier generation unit supplies, to a switching control unit, a carrier (C1) that decreases monotonously during a first period (T10) that is one period subsequent to a period wherein a voltage command value (V**) takes a value not more than the minimum value of the carrier, and wherein the voltage command value takes a first prescribed value that is greater than the minimum value of the carrier, and/or a second period (T10) that is one period prior to a period wherein the voltage command value takes a value not less than the maximum value of the carrier, and wherein the voltage command value takes a second prescribed value that is less than the maximum value. The carrier generation unit also supplies, to the switching control unit, a carrier (C2) that increases monotonously during a third period (T13) that is one period subsequent to the period wherein the voltage command value takes a value not less than the maximum value, and wherein the voltage command value takes a third prescribed value that is less than the maximum value, and/or a fourth period (T13) that is one period prior to the period wherein the voltage command value takes a value not more than the minimum value, and wherein the voltage command value takes a fourth prescribed value that is greater than the minimum value.

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