Motor system
AssigneeDenso Corporation
InventorsKiyotaka Matsubara, Makoto Nakamura, Daigo Nobe, Ryuji Omata
Life of this patent
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Abstract
A control unit calculates a motor voltage vector including a corresponding excitation voltage command and a torque voltage command in response to an output request for the motor and changes a first inverter voltage vector and a second inverter voltage vector while maintaining the motor voltage vector obtained to allow distribution of the motor voltage vector at any ratio. The first inverter voltage vector includes a first excitation voltage command and a first torque voltage command associated with an output from the first inverter, and the second inverter voltage vector includes a second excitation voltage command and a second torque voltage command associated with an output from the second inverter.
Claims17
A motor system, comprising:
- a first inverter which converts direct current power from a first power supply into alternating current power;
- a second inverter which converts direct current power from a second power supply into alternating current power;
- a motor which is driven by the alternating current power from the first inverter and the alternating current power from the second inverter, the motor has a plurality of coils from which the alternating current power from the first inverter is supplied and the alternating current power from the second inverter is supplied, the first inverter is connected to one end of each of the plurality of coils and the second inverter is connected to the other end of each of the plurality of coils;
- and
- a control unit which is configured to calculate a motor voltage vector including a corresponding excitation voltage command and a torque voltage command in response to an output request for the motor and changes a first inverter voltage vector and a second inverter voltage vector while maintaining the motor voltage vector obtained to allow distribution of the motor voltage vector at any distribution ratio of the first inverter voltage vector to the second inverter voltage vector, and
- the control unit is configured to, according to a state of charge of the first power supply and a state of charge of the second power supply, increase the distribution ratio of the first inverter voltage vector during a powering mode so that an output of the first power supply is reduced when the state of charge of the first power supply is high compared to when the state of charge of the first power supply is low, or decrease the distribution ratio of the first inverter voltage vector during a regeneration mode so that an input of the first power supply is reduced when the state of charge of the first power supply is high compared to when the state of charge of the first power supply is low,
- wherein the first inverter voltage vector includes a first excitation voltage command and a first torque voltage command associated with an output from the first inverter, and the second inverter voltage vector includes a second excitation voltage command and a second torque voltage command associated with an output from the second inverter.
A motor system, comprising:
- a plurality of power supplies;
- a plurality of inverters;
- and
- a control unit,
- wherein the control unit is configured to maintain a motor voltage vector obtained by synthesizing a voltage vector from each inverter and to distribute the motor voltage vector V to the voltage vector from each inverter, and
- the control unit is configured to, according to a state of charge of the plurality of power supplies, increase a distribution ratio of one of the voltage vectors during a powering mode so that an output of one of the plurality of power supplies is reduced when the state of charge of the one of the plurality of power supplies is high compared to when the state of charge of the one of the plurality of power supplies is low, or decrease the distribution ratio of the one of the voltage vectors during a regeneration mode so that an input of the one of the plurality of power supplies is reduced when the state of charge of the one of the plurality of power supplies is high compared to when the state of charge of the one of the plurality of power supplies is low.
Dependencies are inferred from the claim text.