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7498756 |
Braking system for electric step motors
A braking system for electric step motors that operate in conjunction with a light assembly, including a moving head for pan or tilt thereof or for moving internal optical components. The step...
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7423393 |
Car control method and car control apparatus
A car control apparatus including a wheel sensor, wheel torque calculating means for calculating wheel torque from the wheel speed, drive force detecting means for detecting drive force generated...
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7327110 |
Drive circuit for braking a motor during a malfunction
A drive system with an electric motor is described, which includes an integrated armature short-circuit brake and a mechanical brake. If the electric motor cannot be controllably slowed down, a...
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7291997 |
Servo system
A motor has built therein a brake for stopping the rotation of the motor and a brake controlling circuit for controlling the brake. The motor is further provided with a bypass circuit for supplying...
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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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7190133 |
Energy storage system and method for hybrid propulsion
A hybrid propulsion system. The system comprises one or more hybrid propulsion traction drives having an electric motor operable to produce mechanical power for propulsion. A hybrid propulsion...
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7176645 |
Control apparatus for electric railcar
A control apparatus for an electric railcar that provides control so that when rotational speed of a motor decreases below a required value, torque of the motor will decrease at a required rate of...
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7073872 |
Motor driving apparatus and disk apparatus using the same
A motor driving apparatus includes a position detector for detecting a rotational position of a motor to output the detection result as a position signal, a frequency comparator for comparing...
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7034480 |
Method for eliminating fuel use during dynamic braking
A method for reducing engine fuel consumption of an electro-motive vehicle during braking, the method including steps for providing an engine for the vehicle, generating primary electric power at a...
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7012392 |
Multi-stage dynamic braking resistor network
A multi-stage dynamic braking resistor network ( 23 ) is provided that includes a plurality of dynamic brake resistors ( 1 a–d ) for dissipating, as heat, regenerative energy inputted onto a...
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6822408 |
Method of securing a machine element and/or a load connected to the machine element in a fixed position
In a method of holding a machine element, whose position is directly or indirectly controlled by an electromotive drive in the absence of a self-locking mechanism, the drive is halted and a brake...
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6739675 |
Brake effort monitor
A brake effort monitor for railcar braking systems includes means connected to receive a brake effort request signal and a vehicle speed signal for generating an energy requested signal. Another...
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6531839 |
Circuit and method for motor control
Disclosed is an optimized brake method for braking a motor rotating at a high speed. When the motor rotates at the high speed, the present invention reduces the rotation speed of the motor using a...
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6459224 |
Zone control method in roller conveyor and zone controller
In a roller conveyor system for carrying out zone control, a conveyed article can be stopped in an approximately constant position without varying the position where the article is stopped in a...
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6424798 |
Device for controlling sensorless brushless-DC-motor
A sensorless brushless-DC-motor mounted on an electric or hybrid vehicle is powered by an on-board battery through an inverter supplying a three-phase pulse width modulated voltage (PWM voltage)....
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6310452 |
Single cycle positioning system utilizing a DC motor
A single cycle positioning system utilizing a DC motor wherein a wide ranging incoming AC supply voltage is rectified and a fixed frequency variable duty cycle pulse width modulation is provided to...
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6294887 |
Motor brake device for a robot
A brake release circuit of an electromagnetic brake for locking a motor and an indication circuit for indicating a brake release are coupled together. Both the circuits may be turned on and off by...
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6213571 |
Control apparatus for an electric vehicle and a method therefor
Problems of a dead-time due to a make-contact delay time until the closure of the regeneration contactor and a drop of torque occurring in the prior art controller for an electric vehicle are...
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6097165 |
Method and apparatus for handling brake failure in variable frequency drive motors
The variable frequency drive of a motor monitors pulse generator feedback while the motor is stopped and an electromechanical brake is set. When the pulse generator feedback exceeds a predetermined...
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6047534 |
Stopping and restarting device in independent driven spindle in spinning machine
Regarding an independently driven type spindle in a spinning machine, when a yarn breakage is occurred in a spindle 10, a brake operating member 35 of the spindle 10 is moved toward a spindle shaft...
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6040561 |
High voltage bus and auxiliary heater control system for an electric or hybrid vehicle
A control system for an electric or hybrid electric vehicle includes a vehicle system controller and a control circuit having an electric immersion heater. The heater is electrically connected to...
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5892341 |
Quick set electric motor brake control
A control circuit (10) is provided for an electric motor brake (12) having an electromagnetic brake coil (14) energizable to actuate the brake to a released condition permitting rotation of an...
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5853229 |
Method and apparatus for controlling the brake system of motor vehicles with electric drive
In a first region of the driver's braking command, regenerative braking produces almost all of the braking torque, whereas the friction brake produces essentially no braking torque. In this region...
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5811947 |
Testing and speed control of electric motors in vehicles having electronically controlled braking systems
A vehicle anti-lock braking (ABS) system having a motor-driven pump (10) for providing a hydraulic supply to the ABS system. The pump motor (10) is controlled by a series device in the form of an...
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5751127 |
Magnet brake
A magnet brake is disclosed. The magnet brake may consist of a stationary magnet assembly and a rotating magnet assembly. The opposing poles on the magnet assemblies have a mutual attraction that...
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5654613 |
Over drive control apparatus of direct current series motor
The invention is made to provide a reliable driving system by solving the problem of the conventional apparatus caused by unstable current in the chopper transistor located at the low end of the...
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5583406 |
Control method and system for regeneration braking of an electric vehicle
When a voltage level determinator judges from the terminal voltage of a smoothing capacitance that a battery is in an over-charged state and cannot receive regeneration energy, a...
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5530328 |
Consist power monitor
A consist power monitor provides information to the engineer of a multiple unit consist on the ability of each locomotive to provide traction power and dynamic braking. The consist power monitor is...
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5524541 |
Method and apparatus for controlling the braking of a printing machine
A description of a method and a device for monitoring the braking of a D.C. motor of a printing machine such as a sheet-fed offset printing machine is given. For safety purposes, in the case of an...
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5498941 |
Speed control device used for electric automobiles and method therefor
A speed control device automatically controlling the travelling speed of overspeeding electric automobiles so as to allow the automobile to travel safely. The speed control device having a...
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5497057 |
Mechanical brake hold circuit for an electric motor
An automated tape library employing a motorized robotic picker wherein the electric motor driving the robotic picker is equipped with two brakes that act simultaneously. The first is a mechanical...
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5492192 |
Electric vehicle with traction control
A vehicle traction control system comprising an electric motor and drive system for an electric vehicle, at least one driven wheel mechanically connected to the electric motor and drive system, at...
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5424622 |
Dynamic brake assembly
A method for dynamically braking a motor, the motor having a plurality of terminals and receiving an input alternating current voltage waveform, by detecting the zero crossing of the input...
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5333706 |
Brake apparatus for a vehicle
A vehicle brake system includes a wheel shaft to which a rotor is fixedly mounted for rotation relative to a stator. Rotor coils are mounted to the rotor in close running relation with stator coils...
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5331261 |
Regenerative braking protection for an electrically-propelled traction vehicle
In an electrical propulsion system on board a moving traction vehicle (such as a rapid transit rail car) having current collectors in contact with an energized third rail, controllable switch means...
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5319292 |
Method and apparatus for preventing motoring while braking
The inventive method and machine are improvements in aspects of a material handling machine (such as an overhead travelling crane) having an electrically-powered traverse drive, e.g., a bridge...
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5255755 |
Power steering apparatus
A power steering apparatus for eliminating the counter electromotive force generated upon stopping the motor for assisting steering force includes a circuit for opening all of the...
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5139121 |
Braking system for a vehicle having a propelling electric motor and an electromagnetic brake
A braking system for a vehicle having a propelling electric motor and an electromagnetic brake, includes a friction brake; a manually operable brake control lever; an interlocking device for...
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5061883 |
Braking system for electric railcars including means for controlling electric brake force
A braking system for an electric railcar having an a.c. motor with a variable voltage variable frequency inverter. The inverter controls the voltage and frequency supplied to the a.c. motor in...
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4962969 |
Adaptive controller for regenerative and friction braking system
A regenerative and friction braking system for a vehicle having one or more roadwheels driven by an electric traction motor includes a driver responsive device for producing a brake demand signal...
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RE32610 |
Electric actuators
An electric actuator which comprises an electric motor operable to a varying degree correspondingly to cause a spring to generate on an output member an output force which varies in accordance with...
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4659970 |
Vehicle docking apparatus and method
Automatic guided vehicles are commonly used in industrial material handling operations. Such vehicles must be accurately docked at predetermined stop locations without the guidance or assistance of...
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4651071 |
Brake control system for supplementing electric brake with friction brake
A brake control system for a railway car having a primary electric brake and a secondary friction brake that supplements the electric brake as the electric brake effectiveness fades. The secondary...
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4417288 |
Broke for magnetic disc drive apparatus
A rotation control device for a magnetic disk drive apparatus, which provides electrical regenerative braking of the apparatus prior to and continuously with actuation of an electro-mechanical...
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4392098 |
RPM Sensor for electronic motor braking
The motor braking circuit for use with an alternating current motor and an AC power source includes a power circuit for supplying a DC braking current to the AC motor and a motor speed sensor which...
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4364001 |
Circuit arrangement for energy economy
An arrangement for energy economy in a drive which includes an induction motor and a clutch-brake unit, particularly for sewing machines is provided. The windings of the induction motor are...
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4340131 |
Operational control system for lift and elevator machinery
Operational control system for lift and elevator machinery adapted for electrodynamic braking, said operational control system being adapted to be connected to the machinery of existing lift or...
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4305030 |
Electronic motor braking system
The motor braking system for use with an alternating current motor and an AC power source includes a power circuit for supplying a DC braking current to the motor. A capacitor which was charged...
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4263988 |
Speed control system for a motor
A speed control system for an elevator motor, comprising a D. C. motor for driving an elevator, a device which generates a speed command signal for the elevator, a speed dynamo which generates a...
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4225813 |
Transit vehicle dynamic brake control apparatus
The present invention relates to an improved dynamic brake effort control apparatus for use with loads such as a transit vehicle, and which provides a better control of and blending of dynamic...
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