Controller for rotary electric machine drive apparatus
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United States of America Patent
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Jan 16, 2018
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app pub date -
Jul 25, 2016
filing date -
Mar 8, 2016
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Abstract
There is provided a controller for a rotary electric machine drive apparatus capable of reducing data-processing load and amount of memories required for a data processing which calculates a voltage command value of the converter which reduces power loss. A controller calculates the required minimum voltage which is required in the case of performing a maximum torque/current control is calculated; calculates a converter loss coefficient which is a coefficient of a polynomial representing a power loss characteristic of the converter; calculates an inverter loss coefficient which is a coefficient of a polynomial representing a power loss characteristic of the inverter; calculates a sum total of loss coefficients for each order of polynomials; calculates the low loss voltage which the sum total power loss becomes a minimum, based on the sum total loss coefficients for each order; sets to the voltage command value of the converter.
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