Voltage conversion device and computer-readable recording medium having program recorded thereon for computer to control voltage conversion by voltage conversion device
AssigneeDenso Corporation
InventorsMasaki Okamura, Takashi Yamashita
Life of this patent
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Abstract
A control device calculates a voltage command value of a voltage step-up converter based on a torque command value and a motor revolution number and calculates an on-duty of an NPN transistor based on the calculated voltage command value and a DC voltage from a voltage sensor. When the on-duty is influenced by a dead time of NPN transistors, control device fixes the on-duty at 1.0 to control the NPN transistors in such a manner that the voltage is increased or decreased.
Claims21
1-11. (canceled)
A voltage conversion device variably changing an input voltage to be applied to an inverter driving a motor, comprising:
- a voltage converter executing voltage conversion between a power supply and said inverter;
- and
- a control device controlling a switching duty of an upper arm and a lower arm included in said voltage converter so that said switching duty is a duty from which influence of a dead time of said voltage converter is removed, when a voltage command value of said voltage conversion is at least a power supply voltage and at most a predetermined voltage.
A voltage conversion device variably changing an input voltage to be applied to an inverter driving a motor, comprising:
- a voltage converter including an upper arm turned on for a first on-duty and a lower arm turned on for a second on-duty determined by subtracting said first on-duty from 1, and executing voltage conversion between a power supply and said inverter by switching said upper arm and said lower arm;
- and
- a control device controlling, in a case where said first on-duty calculated based on a voltage command value of the voltage conversion by said voltage converter is influenced by a dead time of said upper arm and said lower arm, said first on-duty so that said first on-duty is an appropriate on-duty with influence of said dead time removed therefrom.
A computer-readable recording medium having a program recorded thereon for a computer to control voltage conversion by a voltage conversion device,
- said voltage conversion device including a voltage converter having an upper arm turned on for a first on-duty and a lower arm turned on for a second on-duty determined by subtracting said first on-duty from 1, and executing voltage conversion between a power supply and an inverter by switching said upper arm and said lower arm, and
- said program allowing said computer to execute:
- a first step of calculating said first on-duty based on a voltage command value of said voltage conversion;
- a second step of determining whether or not said calculated first on-duty is influenced by a dead time of said upper arm and said lower arm;
- and
- a third step of controlling, when it is determined that said first on-duty is influenced by said dead time, said first on-duty so that said first on-duty is an appropriate on-duty.
Dependencies are inferred from the claim text.