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7548032 |
Locomotive speed determination
A method and system for determining a ground speed for locomotives (e.g., 12, 14 ) of a train ( 16 ) comprising at least two locomotives for use in controlling an operation of the train. The...
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7477036 |
Motor-driven power steering apparatus
In a motor-driven power steering apparatus for converting rotation of an electric motor into a linear stroke of a rack shaft by an interposition of a power transmission mechanism and steering a...
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7467830 |
Managing wheel slip in a locomotive
The present invention is directed to the termination of the occurrence of wheel slip/skid and prediction and prevention of the onset of wheel slip/skid in a locomotive. In one configuration, a...
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7466086 |
Motor drive unit
A motor drive unit comprises a DC power source, a plurality of inverter circuits for converting the a power of this DC power source to an AC power, current detectors for detecting an output current...
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7417386 |
Electronic line shaft
A method and assembly for synchronizing machine operations, the assembly comprising a reference generator for generating a speed reference signal and a position reference signal, a plurality of...
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7285926 |
System and method for locomotive adhesion control
A traction control system for controlling an electric traction motor drivingly coupled to a wheel of a tractive vehicle. The traction control system includes means for determining speed of the...
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7245094 |
Power output apparatus, motor vehicle equipped with power output apparatus, and control method of power output apparatus
In the vehicle of the invention, when the temperature of an inverter 42 for driving a motor MG 2 linked to front wheels 62 a and 62 b reaches or exceeds a preset restriction start...
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7230393 |
Motor control apparatus and motor control method
In response to detection of a skid of drive wheels based on an increase in angular acceleration α of a rotating shaft of a motor, the control procedure of the invention refers to a map...
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7202616 |
Synchronous control method and device of the same
A synchronous control device which is provided with drive motors and a central control unit generating a synchronous reference signal and with which the drive motor is controlled to rotate...
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7148635 |
Motor drive with synchronized timing
A motor control system for controlling a motor includes control logic and a motor controller. The control logic is operable to generate a control signal at a first periodic time responsive to a...
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7132806 |
Motor control apparatus and motor control method
An increase in angular acceleration α of a rotating shaft of a motor, which outputs a torque to a drive shaft linked to drive wheels, may cause a skid on the drive wheels. In response to detection...
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7126293 |
Wheel slip correction system
A wheel slip correction system for an electric traction motor propelled vehicle having a plurality of DC electric traction motors with series connected armature and field windings incorporates an...
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7095208 |
Inverter controller for driving motor and air conditioner using inverter controller
A reactor having a predetermined small capacity is connected to a rectifier, and a capacitor having a predetermined small capacity is connected between DC bus lines of the inverter, so that a...
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7091678 |
Device and method for controlling prime mover
When an angular acceleration α of a rotating shaft of a motor connected with a drive shaft exceeds a preset threshold value αslip, which suggests the occurrence of a skid, the torque control...
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7027900 |
Enhanced locomotive adhesion control
A method of dynamically controlling traction of a locomotive (V) having a plurality of axles (A 1 –A 6 ) on each of which are mounted wheels (W) for moving the locomotive over a set of rails (R)....
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6984946 |
Method for monitoring and controlling traction motors in locomotives
The present invention is directed to a locomotive comprising energy storage units, such as batteries, a prime energy source, such as a diesel engine, and an energy conversion device, such as a...
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6958587 |
Torque distribution for multiple propulsion system vehicles
A vehicle has multiple electrical propulsion systems. Torque is split among the various propulsion systems to meet a variety of requirements and limitations including operator demand, vehicular...
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6958589 |
Inverter controller for driving motor and air conditioner using inverter controller
A reactor having a predetermined small capacity is connected to a rectifier, and a capacitor having a predetermined small capacity is connected between DC bus lines of the inverter. A PN voltage...
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6885930 |
System and method for slip slide control
Certain exemplary embodiments comprise a method comprising: receiving a measurement of a vehicle speed; receiving information indicative of a drive speed; comparing a value related to the...
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6794838 |
Method and system for regulating the power demanded by a rail motor
A method of regulating the power demanded by a rail motor including a current collector system cooperating with a catenary supplied with direct current power by power supply substations distributed...
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6756758 |
Vibration control apparatus for vehicle having electric motor
In a vibration control apparatus for a vehicle driven by an electric motor at least, a first target torque is calculated from a vehicle operating condition such as an accelerator opening, and a...
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6411051 |
Apparatus for monitoring the adhesion of an electric rail vehicle set
This monitoring apparatus for monitoring the adhesion of a motive power unit of an electric rail vehicle set comprises a power control stage for controlling the power supplied to the motor of the...
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6405113 |
Vehicle behavior control apparatus
A vehicle behavior control apparatus is disclosed. The vehicle behavior control apparatus comprises: a slip angle difference predicting section for predicting a difference between a slip angle of...
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6339301 |
AC motor control for a vehicle having a multi-speed transmission—II
A control system for an AC electric motor on an electric vehicle deactivates the motor when the control system senses a shift in the mechanically coupled transmission extending between the motor...
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6278922 |
Device for controlling the steering angle of a vehicle
A device for controlling the steering angle of a vehicle over a wide range maintaining improved control precision. The device controls the steering angle θd through a steering drive device 10 so...
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6216080 |
Wheel module for a vehicle with an electrically controlled braking system (EBS)
A wheel module for the control of the braking force on a wheel of a vehicle with an electrically controlled braking system (EBS), in which the need for data transfer to other wheel modules, or to a...
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6208097 |
Traction vehicle adhesion control system without ground speed measurement
An adhesion control system for a locomotive is provided for achieving and maintaining a maximum adhesion value. The adhesion control system includes a means for determining from an appropriate...
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6194850 |
System and method for determining true ground speed in a locomotive
A processor system and method for accurately determining true ground speed in a vehicle having wheel-axles propelled by traction motors is provided. The vehicle is equipped with a radar unit for...
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6163121 |
Torque maximization and vibration control for AC locomotives
A method and traction control system for an AC locomotive which separately controls the allowable creep level of each individual axle and optimizes traction performance by minimizing torsional...
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6133700 |
Torque controller system having a torque processor with improved tractive effort distribution
A torque controller system provides improved torque distribution as a function of wheel diameter size in a vehicle propelled by electric traction motors. The system includes one or more torque...
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6104148 |
System and method for controlling an AC traction motor without sensing motor rotation speed
A processor system and method are provided for providing motor excitation frequency control in a vehicle propelled by AC electric traction motors. The processor system and method allow for...
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6043617 |
Variable speed driving apparatus for induction machines
A variable speed driving apparatus drives a plurality of induction machines that facilitates reducing the deviations of the primary magnetic fluxes of the induction machines from the reference and...
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6043774 |
Near-range proximity sensor having a fast-tracking analog
A proximity sensor having a generator providing a signal of which a small portion is used as a reference signal and the remaining portion is radiated out towards a target. The radiation reflected...
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6028402 |
Automatic rail characterization for adhesion system evaluation for AC locomotives
A system and method for evaluating the effectiveness of a tractive effort maximizing control system in a wheeled vehicle utilizes a process of operating the vehicle by applying controlled power to...
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6020714 |
Control system for a drive having an asynchronous motor
In the case of a control system (140) for a drive having an asynchronous motor, in particular for a railroad vehicle, which control system (140) comprises a first control loop (141) for motor...
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5936312 |
Power output apparatus and method of controlling the same
The object of the present invention is to carry out control and enable an engine to output a desired power, thereby preventing unexpected charge or discharge of storage battery means. A power...
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5898281 |
Method and device for the common regulation of several electric motors driving the driving wheels of a motor vehicle
In a motor vehicle driving system comprising several asynchronous electric machines (11, 12) each coupled to a driving wheel (13, 14), a polyphase supply device (2) and a regulating device (6)...
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5847534 |
Control system for electric vehicle
The control system is constructed so that an inverter output frequency command is increased/decreased based on a frequency-to-time rate-of-change command, and the frequency-to-time rate-of-change...
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5841254 |
Torque maximization and vibration control for AC locomotives
A traction control system for an ac locomotive optimizes traction performance by separately controlling the allowable creep level of each individual axle and by minimizing torsional vibration per...
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5758014 |
Electric vehicle traction control system and method
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...
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5708334 |
Method for controlling an electric drive of a vehicle
A method for open-loop and closed-loop control of an electric drive of a vehicle, in particular of a rail vehicle, utilizes a frictional engagement between a wheel and a rail or an underlying...
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5661378 |
Tractive effort control method and system for recovery from a wheel slip condition in a diesel-electric traction vehicle
A wheel slip recovery method for a locomotive in which an internal combustion engine is connected in driving relationship to an electric power generator to supply electric power to a plurality of...
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5610819 |
System for enhancing wheel traction in a locomotive by reapplication of excitation using an S-shaped curve
A traction enhancing system detects and corrects wheel slip and enhances wheel traction in a railroad locomotive having a plurality of wheel pairs for engaging a pair of rails and a traction motor...
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5598081 |
Vector control method for controlling a rotor speed of an induction motor
A vector control method is provided for controlling a rotor speed of an induction motor by an inverter which provides an AC current of varying frequency to the induction motor, and a vector...
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5557179 |
Control circuit for plural partially interlocked commutator type motors with oscillation damping characteristics
At least two commutator type motors are arranged to reduce cyclic voltage imbalances or oscillations by connecting a check diode in series with the armature of each motor, and by partially...
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5517092 |
Rotation speed sensing in a drive arrangement for a motor vehicle
In a drive arrangement of a motor vehicle in which the wheels of the motor vehicle are driven by separate electric motors and the electric motors are powered via a d.c. voltage intermediate circuit...
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5473225 |
Electric motor vehicle control apparatus and method for reducing the occurrence of wheel slip
An electric motor vehicle control apparatus has a control circuit which includes a slip/slide detection circuit. A minimum value among the wheel speeds is used to determine a slip condition whereas...
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5442265 |
Method and apparatus for improving the running characteristics of a wheel block bogie
A rail vehicle may be provided with a plurality of individual wheels (11, 12, 21, 22) and traction motors which are supplied with power on a wheel block by wheel block basis by means two control...
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5436538 |
Locomotive wheel slip controller
A wheel slip controller for a locomotive is disclosed that utilizes PID controllers to control the traction wheels during normal locomotive operation. The controller monitors several independent...
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5432418 |
Motor system for an electric type vehicle
The invention concerns a motor system of an electric type vehicle, comprising at least two asynchronous electric motors (M1, M2) supplied in parallel by a central electric supply. This central...
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