Power converter with electrical switching element

A power converter, comprising:

• a power converting unit including an electrical switching element electrically switched on and off selectively in response to a duty ratio of PWM (pulse-width modulation) signal given to the switching element, and an output terminal electrically connected to a battery
• a controller which is comprised of
• i) a drive unit that generates the PWM signal,
• ii) a controlling unit that controls the duty ratio of the PWM signal such that a voltage inputted to the power converter is converted to a voltage to be outputted depending on the duty ratio, and
• iii) a limiting unit that limits at least one of a time change amount of the duty ratio of the PWM signal or a maximum duty ratio of the PWM signal;
• and
• the controller comprises a disconnection detector that detects an electrical disconnection between the power converting unit and the battery;
• and
• wherein the controlling unit controls the PWM signal such that, when the disconnection is not detected by the disconnection detector, the battery has a terminal voltage equal to a target voltage and, when the disconnection is detected by the disconnection detector, the output terminal of the power converting unit has a voltage equal to a target voltage.

A power converter, comprising:

• a power converting unit including an electrical switching element electrically switched on and off selectively in response to a duty ratio of PWM (pulse-width modulation) signal given to the switching element;
• and
• a controller which is comprised of
• i) a drive unit that generates the PWM signal,
• ii) a controlling unit that controls the duty ratio of the PWM signal such that a voltage inputted to the power converter is converted to a voltage to be outputted depending on the duty ratio, and
• iii) a limiting unit that adjusts the duty ratio of the PWM signal such that a time change amount of the duty ratio of the PWM signal is limited below a limit assigned thereto, wherein the limit for the time change amount of the duty ratio of the PWM signal is set to become smaller with a rise in the input voltage to the power converting unit.

A power converter, comprising:

• a power converting unit including an electrical switching element electrically switched on and off selectively in response to a duty ratio of PWM (pulse-width modulation) signal given to the switching element;
• and
• a controller which is comprised of
• i) a drive unit that generates the PWM signal,
• ii) a controlling unit that controls the duty ratio of the PWM signal such that a voltage inputted to the power converter is converted to a voltage to be outputted depending on the duty ratio, and
• iii) a limiting unit configured to limit at least a time change amount of the duty ratio of the PWM signal when the controlling unit controls the switching element such that the output voltage rises.

A power converter, comprising:

• a power converting unit including an electrical switching element electrically switched on and off selectively in response to a duty ratio of PWM (pulse-width modulation) signal given to the switching element;
• and
• a controller which is comprised of
• i) a drive unit that generates the PWM signal,
• ii) a controlling unit that controls the duty ratio of the PWM signal such that a voltage inputted to the power converter is converted to a voltage to be outputted depending on the duty ratio, and
• iii) a limiting unit that limits a time change amount of the duty ratio of the PWM signal;
• wherein the controlling unit uses a feedback gain to produce the PWM signal such that the feedback gain is reduced to allow the limiting unit to limit the time change amount of the duty ratio of the PWM signal.

A power converter, comprising:

• a power converting unit including an electrical switching element electrically switched on and off selectively in response to a duty ratio of PWM (pulse-width modulation) signal given to the switching element;
• and
• a controller which is comprised of
• i) a drive unit that generates the PWM signal,
• ii) a controlling unit that controls the duty ratio of the PWM signal such that a voltage inputted to the power converter is converted to a voltage to be outputted depending on the duty ratio, and
• iii) a limiting unit that limits a time change amount of the duty ratio of the PWM signal;
• wherein the controlling unit sets the maximum duty ratio of the PWM signal depending on a target voltage.

A power converter comprising:

• a power converting means including an electrical switching element electrically switched on and off selectively in response to a duty ratio of PWM (pulse-width modulation) signal given to the switching element;
• a drive means that generates the PWM signal,
• control means for controlling the duty ratio of the PWM signal such that a voltage inputted to the power converter is converted to a voltage to be outputted depending on the duty ratio, and
• a limiting means for limiting both a time change amount of the duty ratio of the PWM signal and a maximum duty ratio of the PWM signal.