Electricity: motor control systems – Closed loop speed control system for dc motor with commutator – Armature control by digital or combined analog and digital...
Patent
1996-08-05
1998-05-26
Masih, Karen
Electricity: motor control systems
Closed loop speed control system for dc motor with commutator
Armature control by digital or combined analog and digital...
318 52, 318434, 318798, 318815, G05F 110
Patent
active
057580146
ABSTRACT:
A system and method that may be implemented in a power inverter or controller, for example, that uses the speed of a rotor to control the torque output of a motor of an electric vehicle. A rotor encoder coupled to the rotor of the motor provides encoder signals that indicate the speed of the rotor and thus the speed of the vehicle. Alternatively, wheel speed sensors may be employed in lieu of the encoder to provide sensed signals that are processed to produce traction control of the vehicle. By monitoring the rate of change of the signals from the encoder or sensor, the controller determines if the drive wheels are spinning due to loss of traction. If this condition is detected, the controller reduces torque until traction has been regained.
REFERENCES:
patent: 4035698 (1977-07-01), Soderberg
patent: 4136303 (1979-01-01), Almquist et al.
patent: 4686434 (1987-08-01), Kojima et al.
patent: 4995862 (1991-02-01), Arocha
patent: 5631829 (1997-05-01), Takasaki et al.
Delco Electronics Corp.
Masih Karen
Navarre Mark A.
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