Electric vehicle drive system
First Claim
1. An electric vehicle drive system, comprising:
- a battery monitoring unit that is loaded on an electrically driven vehicle provided with a regeneration cooperative brake control device and monitors the state of a battery loaded on the electrically driven vehicle; and
a rotating electrical machine control unit that controls a rotating electrical machine of the electrically driven vehicle,wherein the battery monitoring unit, upon detecting that the battery state is an unchargeable state during control of a regeneration cooperative brake, diagnoses whether the battery is chargeable, and upon deciding to be unchargeable from a result of diagnosis, outputs an unchargeable signal,the rotating electrical machine control unit, upon receiving the unchargeable signal during control of the regeneration cooperative brake, executes loss increase control for increasing an internal loss of the rotating electrical machine and reducing regenerative electric power by a regenerative brake, while maintaining torque of the rotating electrical machine at regenerative toque corresponding to force of the regenerative brake,the battery monitoring unit outputs a prediction signal simultaneously with start of the diagnosis, andthe rotating electrical machine control unit, upon receiving the prediction signal during control of the regeneration cooperative brake, executes the loss increase control,wherein the battery monitoring unit, upon deciding to be chargeable from the result of diagnosis, outputs a prediction release signal, andthe rotating electrical machine control unit, upon receiving the prediction release signal after reception of the prediction signal, suspends the loss increase control, and upon receiving the unchargeable signal after reception of the prediction signal, continues the loss increase control.
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Accused Products
Abstract
In order to provide an electric vehicle drive system capable of promoting improvement in stability of vehicle traveling when stopping a regeneration operation during operation of a regeneration cooperative brake, the electric vehicle drive system, a battery control unit 310, upon detecting that a battery state is an unchargeable state during control of the regeneration cooperative brake, diagnoses whether a battery 300 is chargeable, and upon deciding to be unchargeable from a result of diagnosis, outputs a Fail signal. Then, a rotating electrical machine control unit 210, upon receiving a Fail prediction signal while the regeneration cooperative brake is being controlled, executes loss increase control for increasing an internal loss of a rotating electrical machine 900 and reducing regenerative electric power by a regenerative brake while maintaining torque of the rotating electrical machine 900 at regenerative torque corresponding to regenerative brake force.
15 Citations
6 Claims
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1. An electric vehicle drive system, comprising:
- a battery monitoring unit that is loaded on an electrically driven vehicle provided with a regeneration cooperative brake control device and monitors the state of a battery loaded on the electrically driven vehicle; and
a rotating electrical machine control unit that controls a rotating electrical machine of the electrically driven vehicle,wherein the battery monitoring unit, upon detecting that the battery state is an unchargeable state during control of a regeneration cooperative brake, diagnoses whether the battery is chargeable, and upon deciding to be unchargeable from a result of diagnosis, outputs an unchargeable signal, the rotating electrical machine control unit, upon receiving the unchargeable signal during control of the regeneration cooperative brake, executes loss increase control for increasing an internal loss of the rotating electrical machine and reducing regenerative electric power by a regenerative brake, while maintaining torque of the rotating electrical machine at regenerative toque corresponding to force of the regenerative brake, the battery monitoring unit outputs a prediction signal simultaneously with start of the diagnosis, and the rotating electrical machine control unit, upon receiving the prediction signal during control of the regeneration cooperative brake, executes the loss increase control, wherein the battery monitoring unit, upon deciding to be chargeable from the result of diagnosis, outputs a prediction release signal, and the rotating electrical machine control unit, upon receiving the prediction release signal after reception of the prediction signal, suspends the loss increase control, and upon receiving the unchargeable signal after reception of the prediction signal, continues the loss increase control. - View Dependent Claims (2, 3, 4, 5)
- a battery monitoring unit that is loaded on an electrically driven vehicle provided with a regeneration cooperative brake control device and monitors the state of a battery loaded on the electrically driven vehicle; and
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6. An electric vehicle drive system, comprising:
- a battery monitoring unit that is loaded on an electrically driven vehicle provided with a regeneration cooperative brake control device and monitors the state of a battery loaded on the electrically driven vehicle; and
a rotating electrical machine control unit that controls a rotating electrical machine of the electrically driven vehicle,wherein the battery monitoring unit, upon detecting that the battery state is an unchargeable state during control of a regeneration cooperative brake, diagnoses whether the battery is chargeable, and upon deciding to be unchargeable from a result of diagnosis, outputs an unchargeable signal, the rotating electrical machine control unit, upon receiving the unchargeable signal during control of the regeneration cooperative brake, executes loss increase control for increasing an internal loss of the rotating electrical machine and reducing regenerative electric power by a regenerative brake, while maintaining torque of the rotating electrical machine at regenerative toque corresponding to force of the regenerative brake, the battery monitoring unit outputs a prediction signal simultaneously with start of the diagnosis, and the rotating electrical machine control unit, upon receiving the prediction signal during control of the regeneration cooperative brake, executes the loss increase control, wherein the rotating electrical machine control unit;
is provided with a plurality of current maps each indicating a relation between the torque and the rotating angle velocity of the rotating electrical machine and a supply current in accordance with the magnitude of the internal losses;uses a minimum internal loss current map that is the smallest in internal loss in the plurality of current maps when not executing the loss increase control; and uses any one of the other current maps except the minimum internal loss map when executing the loss increase control.
- a battery monitoring unit that is loaded on an electrically driven vehicle provided with a regeneration cooperative brake control device and monitors the state of a battery loaded on the electrically driven vehicle; and
Specification