Appeal No. 1998-1796
Application No. 08/408,154
amendment after final rejection filed May 27, 1997 was
approved for entry by the Examiner.
The claimed invention relates to a motor control device
for an electric vehicle which has a motor powered by a
rechargeable battery. During deceleration periods,
regenerative energy produced by the vehicle motor is used to
recharge the battery. Appellant indicates at pages 3-5 of the
specification that excessive charging of the battery can be
prevented by suppressing the amount of regenerative energy
produced from the motor when either the battery voltage or
charging current exceeds a predetermined value.
Claim 1 is illustrative of the invention and reads as
follows:
1. A motor control device for an electric vehicle which has a
motor powered by a rechargeable battery, said motor control
device comprising:
voltage detecting means for detecting a battery voltage
of said rechargeable battery; and
regenerative braking amount control means for suppressing
an amount of regenerative braking energy supplied from said
motor to said rechargeable battery by controlling said motor
such that said battery voltage remains less than or equal to a
predetermined voltage value, wherein said regenerative braking
amount control means suppresses said amount of regenerative
braking energy when said battery voltage exceeds a first
predetermined voltage.
2
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