AC voltage output apparatus and hybrid vehicle including the same
First Claim
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1. An AC voltage output apparatus, comprising:
- a first poly-phase AC electric motor including a star-connected first poly-phase winding as a stator winding;
a second poly-phase AC electric motor including a star-connected second poly-phase winding as a stator winding;
first and second inverters respectively connected to said first and second poly-phase windings;
inverter control means for controlling said first and second inverters; and
AC command voltage generating means for generating an AC command voltage for generating an AC voltage across a first neutral point of said first poly-phase winding and a second neutral point of said second poly-phase winding;
whereinsaid AC command voltage generating means includes distributing means for distributing said AC command voltage to first and second AC command voltages based on a voltage burden ratio indicating ratio of voltage burdens to be borne by the first and second inverters for generating said AC voltage; and
said inverter control means controls said first inverter based on a command voltage obtained by superposing said first AC command voltage on a command voltage of each phase for said first poly-phase AC electric motor, and controls said second inverter based on a command voltage obtained by superposing said second AC command voltage on a command voltage of each phase for said second poly-phase AC electric motor.
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Abstract
An AC command voltage obtained by compensating a reference value of a commercial AC voltage output from a multiplication unit using an FB control unit is multiplied by k (0≦k≦1) by a multiplication unit and output to a first inverter control unit, and the remaining part is output to a second inverter control unit. The first and second inverter control units generate signals, based on command voltages obtained by superposing the AC command voltage from an AC output control unit on respective phase command voltages.
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Citations
16 Claims
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1. An AC voltage output apparatus, comprising:
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a first poly-phase AC electric motor including a star-connected first poly-phase winding as a stator winding; a second poly-phase AC electric motor including a star-connected second poly-phase winding as a stator winding; first and second inverters respectively connected to said first and second poly-phase windings; inverter control means for controlling said first and second inverters; and AC command voltage generating means for generating an AC command voltage for generating an AC voltage across a first neutral point of said first poly-phase winding and a second neutral point of said second poly-phase winding;
whereinsaid AC command voltage generating means includes distributing means for distributing said AC command voltage to first and second AC command voltages based on a voltage burden ratio indicating ratio of voltage burdens to be borne by the first and second inverters for generating said AC voltage; and said inverter control means controls said first inverter based on a command voltage obtained by superposing said first AC command voltage on a command voltage of each phase for said first poly-phase AC electric motor, and controls said second inverter based on a command voltage obtained by superposing said second AC command voltage on a command voltage of each phase for said second poly-phase AC electric motor. - View Dependent Claims (2, 3, 9)
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4. An AC voltage output apparatus, comprising:
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a first poly-phase AC electric motor including a star-connected first poly-phase winding as a stator winding; a second poly-phase AC electric motor including a star-connected second poly-phase winding as a stator winding; first and second inverters respectively connected to said first and second poly-phase windings; first and second inverter control means for controlling said first and second inverters respectively; AC command voltage generating means for generating an AC command voltage for generating an AC voltage across a first neutral point of said first poly-phase winding and a second neutral point of said second poly-phase winding; and voltage detecting means for detecting a voltage across said first and second neutral points;
whereinsaid AC command voltage generating means includes a first feedback operating unit calculating a first amount of compensation based on a deviation between an average value of magnitude of voltages detected by said voltage detecting means and a reference value indicating a target of the average value, and generating said AC command voltage based on said reference value compensated for by using the calculated first amount of compensation; said first inverter control means controls said first inverter based on a command voltage of each phase for said first poly-phase AC electric motor; and said second inverter control means controls said second inverter based on a command voltage obtained by superposing said AC command voltage on a command voltage of each phase for said second poly-phase AC electric motor. - View Dependent Claims (5, 6)
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7. An AC voltage output apparatus, comprising:
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a first poly-phase AC electric motor including a star-connected first poly-phase winding as a stator winding; a second poly-phase AC electric motor including a star-connected second poly-phase winding as a stator winding; first and second inverters respectively connected to said first and second poly-phase windings; inverter control means for controlling said first and second inverters; AC command voltage generating means for generating an AC command voltage for generating an AC voltage across a first neutral point of said first poly-phase winding and a second neutral point of said second poly-phase winding; and voltage detecting means for detecting a voltage across said first and second neutral points;
whereinsaid AC command voltage generating means includes a repetitive control unit calculating, based on a deviation in an immediately preceding AC voltage cycle between a reference voltage indicating a target of said AC voltage and the voltage detected by said voltage detecting means a first amount of compensation successively for each phase of said AC voltage; and said inverter control means controls said first and second inverters based on a command voltage obtained by superposing said AC command voltage and said first amount of compensation on a command voltage of each phase for said first or second poly-phase AC electric motor. - View Dependent Claims (8)
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10. An AC voltage output apparatus, comprising:
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a first poly-phase AC electric motor including a star-connected first poly-phase winding as a stator winding; a second poly-phase AC electric motor including a star-connected second poly-phase winding as a stator winding; first and second inverters respectively connected to said first and second poly-phase windings; and a controller executing a series of operations;
whereinsaid controller generates an AC command voltage for generating an AC voltage across a first neutral point of said first poly-phase winding and a second neutral point of said second poly-phase winding;
distributes said AC command voltage to first and second AC command voltages based on a voltage burden ratio indicating ratio of voltage burdens to be borne by the first and second inverters for generating said AC voltage;
controls said first inverter based on a command voltage obtained by superposing said first AC command voltage on a command voltage of each phase for said first poly-phase AC electric motor; and
controls said second inverter based on a command voltage obtained by superposing said second AC command voltage on a command voltage of each phase for said second poly-phase AC electric motor. - View Dependent Claims (11, 12)
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13. An AC voltage output apparatus, comprising:
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a first poly-phase AC electric motor including a star-connected first poly-phase winding as a stator winding; a second poly-phase AC electric motor including a star-connected second poly-phase winding as a stator winding; first and second inverters respectively connected to said first and second poly-phase windings; a controller executing a series of operations; and a voltage sensor detecting a voltage across said first and second neutral points;
whereinsaid controller calculates a first amount of compensation based on a deviation between an average value of magnitude of voltages detected by said voltage sensor and a reference value indicating a target of the average value;
generates an AC command voltage for generating an AC voltage across a first neutral point of said first poly-phase winding and a second neutral point of said second poly-phase winding, based on said reference value compensated for by using the calculated first amount of compensation;
controls said first inverter based on a command voltage of each phase for said first poly-phase AC electric motor; and
controls said second inverter based on a command voltage obtained by superposing said AC command voltage on a command voltage of each phase for said second poly-phase AC electric motor. - View Dependent Claims (14)
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15. An AC voltage output apparatus, comprising:
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a first poly-phase AC electric motor including a star-connected first poly-phase winding as a stator winding; a second poly-phase AC electric motor including a star-connected second poly-phase winding as a stator winding; first and second inverters respectively connected to said first and second poly-phase windings; a controller executing a series of operations; and a voltage sensor detecting a voltage across said first and second neutral points;
whereinsaid controller generates an AC command voltage for generating an AC voltage across a first neutral point of said first poly-phase winding and a second neutral point of said second poly-phase winding;
calculates, based on a deviation in an immediately preceding AC voltage cycle between a reference voltage indicating a target of said AC voltage and the voltage detected by said voltage sensor a first amount of compensation successively for each phase of said AC voltage; and
controls said first and second inverters based on a command voltage obtained by superposing said AC command voltage and said first amount of compensation on a command voltage of each phase for said first or second poly-phase AC electric motor. - View Dependent Claims (16)
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Specification