Electric power converter, electric power converter controlling method and electric power converting system
First Claim
1. A control unit for controlling an electric power converter, the electric power converter converting multi-phase alternating current inputted from a generator and supplying the converted current to a motor, the control unit comprising:
- an input power factor commanding section operable to output an input power factor command value for an input power factor of the generator according to an operating condition of the motor; and
an input power factor controlling section operable to output a control signal to the electric power converter, the control signal for controlling the input power factor and based on the input power factor command value wherein the control signal includes an ON/OFF signal output to each of a first switch connecting R-phase and U-phase of the electric power converter, a second switch connecting S-phase and the U-phase of the electric power converter, a third switch connecting T-phase and the U-phase of the electric power converter, a fourth switch connecting the R-phase and V-phase of the electric power converter, a fifth switch connecting S-phase and the V-phase of the electric power converter, a sixth switch connecting the T-phase and the V-phase of the electric power converter, a seventh switch connecting the R-phase and W-phase of the electric power converter, an eighth switch connecting the R-phase and the W-phase of the electric power converter, and a ninth switch connecting the T-phase and the W-phase of the electric power converter.
1 Assignment
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Accused Products
Abstract
An electric power converter, electric power converter controlling method and electric power converting system for converting multi-phase alternating-current inputted from a generator and outputting multi-phase alternating current for controlling a drive of a motor. An input power factor commanding section outputs a command value of an input power factor according to an operating condition of the motor, and an input power factor controlling section controls the input power factor of the generator on the basis of the command value of the input power factor from the input power factor commanding section.
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Citations
17 Claims
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1. A control unit for controlling an electric power converter, the electric power converter converting multi-phase alternating current inputted from a generator and supplying the converted current to a motor, the control unit comprising:
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an input power factor commanding section operable to output an input power factor command value for an input power factor of the generator according to an operating condition of the motor; and an input power factor controlling section operable to output a control signal to the electric power converter, the control signal for controlling the input power factor and based on the input power factor command value wherein the control signal includes an ON/OFF signal output to each of a first switch connecting R-phase and U-phase of the electric power converter, a second switch connecting S-phase and the U-phase of the electric power converter, a third switch connecting T-phase and the U-phase of the electric power converter, a fourth switch connecting the R-phase and V-phase of the electric power converter, a fifth switch connecting S-phase and the V-phase of the electric power converter, a sixth switch connecting the T-phase and the V-phase of the electric power converter, a seventh switch connecting the R-phase and W-phase of the electric power converter, an eighth switch connecting the R-phase and the W-phase of the electric power converter, and a ninth switch connecting the T-phase and the W-phase of the electric power converter. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An electric power converting system comprising:
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a generator operable to generate multi-phase alternating current; a motor driven by the multi-phase alternating current; an electric power converter connected to the generator and the motor; and a control unit for controlling the electric power converter, the control unit including; an input power factor commanding section operable to generate an input power factor command value for an input power factor of the generator, the input power factor command value based on an operating condition of the motor; and an input power factor controlling section operable to output a control signal to the electric power converter for controlling the input power factor based on the input power factor command value wherein the input power factor controlling section further comprises; an input voltage determining section operable to generate an input voltage value and a mode signal based on a voltage of the multi-phase alternating current from the generator; an output voltage calculating section operable to calculate an output voltage command value based on an output torque command value and an output rotation angular speed of the motor; a voltage distribution ratio calculating section operable to calculate a voltage distribution ratio based on the input voltage value and the input power factor command value; a virtual PWM signal generating section operable to generate a virtual PWM signal for each of two virtual direct current voltage sources based on the voltage distribution ratio; and a signal synthesizing section operable to generate the control signal as a synthesized PWM signal based on the mode signal and the virtual PWM signals. - View Dependent Claims (12, 13, 14)
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15. A method for controlling an electric power converter, wherein the electric power converter receives multi-phase alternating current input current from a generator and supplies converted output current to a motor, the method comprising:
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determining an input power factor command value for the input power factor of the generator, the input power factor command value based on an operating condition of the motor; outputting a control signal to the electric power converter for controlling the input power factor of the generator based on the input power factor command value generating a conversion current by executing a coordinate conversion of the input current from the generator; generating a conversion current command value; calculating an adjustment value for the input power factor command value based on a difference between the conversion current and the conversion current command value; and correcting the input power factor command value based on a sum of the input power factor command value and the adjustment value. - View Dependent Claims (16, 17)
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Specification