Electricity: motor control systems – Open loop speed control system for dc motor with commutator – Analog armature control
Patent
1992-06-15
1994-03-01
Ro, Bentsu
Electricity: motor control systems
Open loop speed control system for dc motor with commutator
Analog armature control
123497, 318375, F02M 3708
Patent
active
052915786
ABSTRACT:
A controller for a vehicle fuel pump electric motor is connected to one or more vehicle sensors for sensing fuel flow demand and pulse width modulating the motor to control the speed. A fuel demand sensor and a triangle generator are connected to a summing controller for generating a pulse width modulated control signal to a driver. The driver has a pair of outputs for generating a pair of complementary pulse width modulated switch signals to a pair of switches whereby the switches are switched on and off alternately. One of the switches is connected in series between a power supply and the motor armature and the other switch is connected across the armature. A crash sensor, such as an inertia switch, is connected to the summing controller for terminating pulse width modulation in the event of a crash. The switch connected across the armature can be turned on to short circuit the armature and quickly stop the motor in the event of a crash.
REFERENCES:
patent: 3582747 (1971-06-01), Kearns
patent: 4271383 (1981-06-01), Endo
patent: 4403177 (1983-09-01), Weber et al.
patent: 5044344 (1991-09-01), Tuckey et al.
patent: 5055758 (1991-10-01), Hock
patent: 5092302 (1992-03-01), Mohan
Clemens William J.
First Switch, Inc.
Ro Bentsu
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