Electric drive control apparatus, electric drive control method and program thereof
First Claim
1. An electric drive control apparatus for an electric machine, comprising:
- a controller that;
computes an instruction value based on an electric machine rotational speed and a target electric machine torque that represents a target value of an electric machine torque;
generates a drive signal based on the instruction value;
computes a voltage saturation variable that represents a likelihood of an occurrence of a voltage saturation;
determines whether a switch condition for switching a control between an asynchronous PWM control and a synchronous PWM control is met based on the voltage saturation variable; and
selects and outputs the drive signal and switches the control between the asynchronous PWM control and the synchronous PWM control based on a determination as to the switch condition.
1 Assignment
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Accused Products
Abstract
An electric drive control apparatus for an electric machine, includes a controller that computes an instruction value based on an electric machine rotational speed and a target electric machine torque that represents a target value of an electric machine torque, generates a drive signal based on the instruction value, computes a voltage saturation variable that represents a likelihood of an occurrence of a voltage saturation, determines whether a switch condition for switching a control between an asynchronous PWM control and a synchronous PWM control is met based on the voltage saturation variable, and selects and outputs the drive signal and switches the control between the asynchronous PWM control and the synchronous PWM control based on a determination as to the switch condition.
17 Citations
24 Claims
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1. An electric drive control apparatus for an electric machine, comprising:
a controller that; computes an instruction value based on an electric machine rotational speed and a target electric machine torque that represents a target value of an electric machine torque; generates a drive signal based on the instruction value; computes a voltage saturation variable that represents a likelihood of an occurrence of a voltage saturation; determines whether a switch condition for switching a control between an asynchronous PWM control and a synchronous PWM control is met based on the voltage saturation variable; and selects and outputs the drive signal and switches the control between the asynchronous PWM control and the synchronous PWM control based on a determination as to the switch condition. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. An electric drive control method comprising the steps of:
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computing an instruction value based on an electric machine rotational speed and a target electric machine torque that represents a target value of an electric machine torque; generating a drive signal based on the instruction value; computing a voltage saturation variable that represents a likelihood of an occurrence of a voltage saturation; determining whether a switch condition for switching a control between an asynchronous PWM control and a synchronous PWM control is met based on the voltage saturation variable; and selecting and outputting the drive signal and switching the control between the asynchronous PWM control and the synchronous PWM control based on a result of a determination as to the switch condition. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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23. A program of an electric drive control device, comprising:
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a routine that computes an instruction value based on an electric machine rotational speed and a target electric machine torque that represents a target value of an electric machine torque; a routine that generates a drive signal based on the instruction value; a routine that computes a voltage saturation variable that represents a likelihood of an occurrence of a voltage saturation; a routine that determines whether a switch condition for switching a control between an asynchronous PWM control and a synchronous PWM control is met based on the voltage saturation variable; and a routine that selects and outputs the drive signal and switches the control between the asynchronous PWM control and the synchronous PWM control based on a determination as to the switch condition. - View Dependent Claims (24)
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Specification