Electricity: motive power systems – Braking – Dynamic braking
Patent
1990-09-07
1991-08-20
Shoop, Jr., William M.
Electricity: motive power systems
Braking
Dynamic braking
318273, H02P 300
Patent
active
050417720
ABSTRACT:
An apparatus for controlling dynamic braking in a vehicle having at least one drive motor of the type having an armature and a field. The motor is adapted to function as an alternator during dynamic braking for dissipating power through a resistor grid. The vehicle includes a field current controller for regulating the level of dynamic braking by controlling the current level through the motor field. A brake level selector is provided for producing a desired braking level signal. A field current sensor senses the current level in the motor field and produces an actual field current signal. A grid current sensor senses the level of current flowing through the resistor grid and produces an actual grid current signal. A controller receives the desired brake level signal, the actual field current signal, and the actual grid current signal. The controller produces a first desired field current signal and a desired grid current signal in response to the desired brake level signal. The controller further produces a second desired field current signal in response to the actual field current, actual grid current, and desired grid current signals, compares the first and second desired current field and produces a final desired field current signal responsive to the compared signals. The field current through the motor is controlled in response to the final desired field current signal.
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Earleson Walter E.
Evans Raymond G.
Mirhakimi Siamak
Caterpillar Inc.
Noe Stephen L.
Shoop Jr. William M.
Vander Leest Kirk A.
Wysocki A. Jonathan
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