Control device for vehicular AC generator, and connector
AssigneeDenso Corporation
InventorsKoji Tanaka, Makoto Taniguchi, Takeshi Sada
Life of this patent
Estimating the term…
Abstract
A control voltage is set to an acceleration control voltage which is higher than a battery voltage V by a predetermined voltage difference ΔV1 within a range and delayed by a predetermined time ΔT1 during acceleration at low speeds. During acceleration at low speeds, the rotational speed is less than a predetermined value and the rate of increase in rotational speed is equal to or greater than another predetermined value. The range of voltage is higher than battery voltage V and lower than the steady state control voltage of 14.5V.
Claims21
A motor vehicle alternator driven by an engine, comprising:
- a field coil;
- an armature coil;
- a speed sensor portion for sensing a rotational speed of said engine according to a quantity of electricity operatively associated with the rotational speed of said engine;
- a rectifier for rectifying an alternating voltage generated by said armature coil to apply an output voltage to a battery and an electrical load;
- and
- a controller that sets a control voltage to a predetermined steady state control voltage to control a field current according to a difference between said control voltage and a battery voltage of said battery to allow said battery voltage to converge with said control voltage;
- wherein said controller sets said control voltage to an acceleration control voltage that is higher than said battery voltage by a predetermined voltage difference, said control voltage being higher than said battery voltage and less than said steady state control voltage during acceleration at low speeds when said rotational speed is equal to or less than a predetermined value and a rate of increase of said rotational speed is equal to or greater than a predetermined value.
A controller for use in a motor vehicle alternator comprising:
- input means for inputting a quantity of electricity operatively associated with a rotational speed of an engine and a battery voltage;
- output means for outputting an output signal to control a field current of a field coil;
- control means for varying said output signal to allow said battery voltage to approach a control voltage;
- first setting means for setting said control voltage to a predetermined steady state control voltage;
- and
- second setting means for setting said control voltage to an acceleration control voltage that is higher than said battery voltage by a predetermined voltage difference, said control voltage set higher than said battery voltage and less than said steady state control voltage during acceleration at low speeds where the rotational speed of the engine is equal to or less than a predetermined value and a rate of increase in said rotational speed is equal to or greater than a predetermined value.
A method for controlling a motor vehicle alternator, wherein a quantity of electricity operatively associated with a rotational speed of an engine and a battery voltage are input, and a field current is controlled to allow said battery voltage to approach a control voltage, said method comprising the steps of:
- setting said control voltage to a predetermined steady state control voltage;
- and
- setting said control voltage to an acceleration control voltage that is higher than said battery voltage by a predetermined voltage difference, said control voltage set higher than said battery voltage and less than said steady state control voltage during acceleration at low speeds where the rotational speed of the engine is equal to or less than a predetermined value and a rate of increase in said rotational speed is equal to or greater than a predetermined value.
A motor vehicle alternator comprising:
- a field coil;
- an armature coil;
- a speed sensor portion for sensing a rotational speed of an engine;
- a rectifier for rectifying an alternating voltage generated by said armature coil to apply an output voltage to a battery and an electrical load;
- and
- a controller for setting a control voltage to a predetermined steady state control voltage to control a field current according to a difference between said control voltage and a battery voltage of said battery to allow said battery voltage to converge with said control voltage;
- wherein said controller sets said control voltage to an acceleration control voltage that is higher than said battery voltage by a predetermined voltage difference, said control voltage set higher than said battery voltage and less than said steady state control voltage during acceleration at low speeds with said rotational speed being equal to or less than a predetermined value and a rate of increase in said rotational speed being equal to or greater than a predetermined value.
A controller for use in a motor vehicle alternator comprising:
- input means for inputting a rotational speed of an engine and a battery voltage;
- output means for outputting an output signal to control field current of a field coil;
- control means for varying said output signal to allow said battery voltage to approach a control voltage;
- first setting means for setting said control voltage to a predetermined steady state control voltage;
- and
- second setting means for setting said control voltage to an acceleration control voltage that is higher than said battery voltage by a predetermined voltage difference, said control voltage set higher than said battery voltage and less than said steady state control voltage during acceleration at low speeds with the rotational speed of the engine being equal to or less than a predetermined value and a rate of increase in said rotational speed being equal to or greater than a predetermined value.
A method for controlling a motor vehicle alternator wherein a rotational speed of an engine and a battery voltage are input, and field current is controlled to allow said battery voltage to approach a control voltage, said method comprising the steps of:
- setting said control voltage to a predetermined steady state control voltage, and
- setting said control voltage to an acceleration control voltage that is higher than said battery voltage by a predetermined voltage difference, said control voltage set higher than said battery voltage and less than said steady state control voltage during acceleration at low speeds with the rotational speed of the engine being equal to or less than a predetermined value and a rate of increase in said rotational speed being equal to or greater than a predetermined value.
Dependencies are inferred from the claim text.