Brake control apparatus and method
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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May 7, 2002
Grant Date -
N/A
app pub date -
May 31, 2000
filing date -
Jul 11, 1997
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Brake control apparatus and includes an electric motor arranged to drive a wheel and a brake operable to apply a braking force to inhibit the rotation of the wheel. An input signal indicative of a desired angular velocity of the wheel is provided to the control. The current flowing through the electric motor is monitored and a monitoring signal is provided. The power to the electric motor is controlled in response to the input signal by generating a control voltage. After setting the control voltage to zero the brake applies the braking force at a braking time. The braking time may be determined according to the magnitude of the monitoring signal when the control voltage is set to zero, according to the rate of change of the monitoring signal, or according to the polarity of the monitoring signal. An electric vehicle using the brake control apparatus is also disclosed, as is a method of controlling a brake for applying a braking force to inhibit the rotation of a wheel driven by an electric motor.
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