Optimizing system for vehicle traction motors
October 29, 2012. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3686549 3694715 D.C. motor control Safety features for electric vehicle control Control circuit for an electric vehicle traction motor Speed control and braking circuit for a series connected DC machine Battery-powered electric vehicle d.c. motor control High temperature skin antenna Vehicle motor switching apparatus Patent #: 5165006 InventorAssigneeApplicationNo. 968127 filed on 10/29/1992US Classes:318/139, BATTERY-FED MOTOR SYSTEMS388/801, Field control, or field and armature control, by digital or combined analog and digital circuitry388/803, Field control, or field and armature control, by analog (only) circuitry388/804By pulse width or duty cycle modificationExaminersPrimary: Ro, BentsuAttorney, Agent or FirmInternational ClassH02P 005/17AbstractThe present invention features a system for optimizing control of separately excited shunt-wound dc motors, where optimization is achieved through microprocessor-based independent PWM control of a chopper (armature) and an H-bridge (field). Connected to the armature is an armature voltage amplifier for varying the applied armature voltage. A field voltage amplifier is also provided for determining the direction of motor rotation and varying the voltage applied to the field winding. A first sensor is connected to the driven wheel(s) of the vehicle in order to determine the wheel rotational speed. A second sensor is connected to the armature circuit in order to determine the armature current. A third sensor is connected to the field circuit in order to determine the field current. A decoupling controller uses the wheel speed and armature current information, and adjusts the armature voltage and the field voltage. An optimal controller uses the wheel speed, field current and armature current information, and adjusts the armature voltage and the field current.Field of SearchBATTERY-FED MOTOR SYSTEMSCLOSED LOOP SPEED CONTROL SYSTEM FOR DC MOTOR WITH COMMUTATOR Field control, or field and armature control, by digital or combined analog and digital circuitry Field control, or field and armature control, by analog (only) circuitry By pulse width or duty cycle modification By voltage or current modification By pulse width or duty cycle modification By voltage or current modification Electric With motor in or moveable with wheel With electronic devices (logic gates, semi-conductors, vacuum tubes, etc.) in control circuit | |
