Current value determination device, controller, electric compressor, current value determination method, and control method
AssigneeMitsubishi Heavy Industries Thermal Systems, Ltd.
InventorsMakoto Hattori, Takayuki Takashige, Kyohei Watanabe
Life of this patent
Estimating the term…
Abstract
A current value determination device provided with: a capacitor current computation unit for computing the capacitor current of a capacitor included in a high-voltage circuit that drives a motor, on the basis of the input voltage of an inverter included in the high-voltage circuit and the revolution speed of the motor; and a capacitor current determination unit for determining the value of capacitor current on the basis of the input voltage of the inverter, the revolution speed of the motor, the capacitor current computed by the capacitor current computation unit, and a prescribed model for determination.
Claims10
A current value determination device comprising:
- a capacitor current determination unit which determines whether or not a capacitor current is a value within an appropriate range, based on an input voltage of an inverter included in a high-voltage circuit which drives a motor, a rotation speed of the motor, the capacitor current of a capacitor included in the high-voltage circuit, and a predetermined determination model which defines an appropriate relationship for values taken by the parameters,
- wherein the determination model defines a combination of a voltage value, the rotation speed, and a current value defined by coordinates of a region inside a solid having a predetermined shape in a three-dimensional coordinate system having each of the voltage value, the rotation speed, and the current value as a coordinate axis as a combination of appropriate values of the parameters, and
- wherein the capacitor current determination unit determines whether or not a value of the capacitor current is appropriate depending on whether or not a point of which coordinates are indicated by the input voltage of the inverter, the rotation speed of the motor, and the capacitor current is included in a region inside the solid in the three-dimensional coordinate system.
A current value determination method comprising:
- a step of determining whether or not a capacitor current is a value within an appropriate range, based on an input voltage of an inverter included in a high-voltage circuit which drives a motor, a rotation speed of the motor, the capacitor current of a capacitor included in the high-voltage circuit, and a predetermined determination model which defines an appropriate relationship for values taken by the parameters,
- wherein the determination model defines a combination of a voltage value, the rotation speed, and a current value defined by coordinates of a region inside a solid having a predetermined shape in a three-dimensional coordinate system having each of the voltage value, the rotation speed, and the current value as a coordinate axis as a combination of appropriate values of the parameters, and
- wherein the step comprises a step of determining whether or not a value of the capacitor current is appropriate depending on whether or not a point of which coordinates are indicated by the input voltage of the inverter the rotation speed of the motor, and the capacitor current is included in a region inside the solid in the three-dimensional coordinate system.
Dependencies are inferred from the claim text.