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US 11,623,528 B2Granted
Motor driving control method and system
AssigneesHyundai Motor Company, Kia Motors Corporation
InventorsMin Su Kang, Chang Seok You, Sung Do Kim, Dong Hun Lee
Life of this patent
Estimating the term…
Abstract
A motor driving control method for controlling a motor speed so that a speed measured value of a motor follows a speed command value is provided. The method includes driving the motor by repeating an on section where a torque is generated in the motor and an off section where a torque is not generated in the motor at a regular period, based on the speed command value, wherein the driving includes applying a phase voltage to only one of multiple phases of the motor in the on section by a pulse width modulation scheme.
Claims16
A motor driving control method for controlling a motor speed so that a speed measured value of a motor follows a speed command value, the method comprising:
- driving the motor by repeating an on section where a torque is generated in the motor and an off section where a torque is not generated in the motor at a regular period, based on the speed command value,
- wherein the driving includes performing switching control of an inverter according to a predetermined pulse width modulation duty on only one target phase so that a phase voltage corresponding to only one of multiple phases of the motor is generated in the on section;
- and
- wherein a start point and an end point of the on section are determined before and after a time point when a q-axis in a rotating coordinate system of the motor meets an axis corresponding to one phase to which the phase voltage is applied in a fixed coordinate system, respectively.
1 more element
A motor driving control system, comprising:
- a speed controller configured to determine a current command value for a driving current for driving a motor so that a speed measured value of the motor follows a speed command value for the motor;
- a current controller configured to determine a voltage command value for driving the motor so that a motor driving current measured value of an inverter provided to the motor follows the current command value;
- a voltage output converter configured to convert the voltage command value and perform on/off control of a switching element included in the inverter based on the voltage command value;
- and
- a torque on/off determiner configured to determine whether to perform a torque on/off mode for driving the motor by repeating an on section where a torque is generated in the motor and an off section where a torque is not generated in the motor at a regular period,
- wherein when the torque on/off determiner determines that the torque on/off mode is performed, the voltage output converter is configured to control the inverter so that a switching control of the inverter is performed according to a predetermined pulse width modulation duty on only one target phase so that a phase voltage corresponding to only one of multiple phases of the motor is generated in the on section;
- and
- wherein a start point and an end point of the on section are determined before and after a time point when a q-axis in a rotating coordinate system of the motor meets an axis corresponding to one phase to which the phase voltage is applied in a fixed coordinate system, respectively.
5 more elements
A motor driving control method, comprising:
- determining a current command value for a driving current for driving a motor so that a speed measured value of the motor follows a speed command value for the motor;
- determining a voltage command value for driving the motor so that a motor driving current measured value of an inverter provided to the motor follows the current command value;
- converting the voltage command value and performing on/off control of a switching element included in the inverter based on the voltage command value;
- determining whether to perform a torque on/off mode for driving the motor by repeating an on section where a torque is generated in the motor and an off section where a torque is not generated in the motor at a regular period;
- and
- when the torque on/off mode is determined to be performed, controlling the inverter according to a predetermined pulse width modulation duty on only one target phase so that a phase voltage corresponding to only one of multiple phases of the motor is generated in the on section, and so that phases to which the phase voltage is not applied, among the multiple phases of the motor, are always-on or always-off, in the on section;
- and
- wherein a start point and an end point of the on section are determined before and after a time point when a q-axis in a rotating coordinate system of the motor meets an axis corresponding to one phase to which the phase voltage is applied in a fixed coordinate system, respectively.
5 more elements
Dependencies are inferred from the claim text.