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7630180 |
Motor starter circuit
The invention concerns a motor starter circuit for an induction motor, particularly a single-phase AC induction motor, with a main winding ( 4 ) and an auxiliary winding ( 5 ) supplied with...
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7623326 |
Method and device for switching off an inductive load in a failsafe manner
A method and a device for switching off an inductive load in a failsafe manner are proposed. According to one aspect of the invention, the method and the device are configured such that a...
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7622876 |
Overload prevention device for permanent magnet DC motors
A method, apparatus or computer program implements an overload prevention approach involving monitoring a speed of a motor; detecting an overload condition of the motor based on the monitored...
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7619859 |
Electric power steering device
An electric power steering device that can estimate an ambient temperature and apply current limiting without using ambient temperature detecting means is provided. The electric power steering...
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7608940 |
Power supply device and method of controlling the same
A power supply device and a method for controlling the power supply device in which a fusion checking process for the cathode side relay and the anode side relay is easily performed within a short...
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7609491 |
Clothes dryer motor with broken belt switch
A clothes dryer includes a motor adapted to be mounted on a frame of the dryer for driving a dryer belt to rotate a drum of the dryer. The motor includes a rotor adapted to rotate the belt, at...
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7606011 |
Motor controller with automated input power determination
A motor controller automatically determines a motor input power setting based upon manually entered motor output values. The motor controller includes an interface and an input power determining...
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7602594 |
Motor control apparatus and motor control method
To provide a motor control apparatus, including a rotational number detecting means for detecting the rotational number of a motor; a current detecting means for detecting a motor current; a...
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7586726 |
Switching element overcurrent protection circuit which operates within a high-voltage system that incorporates the switching element
A circuit for detecting excessive current flow through a switching element derives an electrical quantity relating to a condition of the switching element and correlated with the current level, and...
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7586722 |
High voltage interlock system and control strategy
A High Voltage Interlock Loop (HVIL) system and Control Strategy is provided for an alternative fuel vehicle including an electric, a hybrid electric, or a fuel cell vehicle. Generally, the HVIL...
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7583483 |
Vehicle AC ground fault detection system
A vehicle ground fault detection system for detecting a ground fault includes a fault detection circuit having a resistance element. The resistance element has one side connected to a supply...
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7565267 |
Life prediction and monitoring of components
A counting unit counts a current supplying duration for a component which determines a life of a device. A prediction unit predicts the device life based on an integrated current supplying duration...
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7561386 |
Switch monitoring circuit
A switch monitoring circuit includes a switch arranged to be turned ON/OFF in response to an operation, a capacitor connected to both ends of the switch, a voltage applying unit that applies a...
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7558031 |
Intelligent automatic bypass for a motor control device
An intelligent automatic bypass for a motor control device determines if a fault that is occurring is a restricted or non-restricted fault. A restricted fault is one that may damage or destroy the...
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7551411 |
Control and protection methodologies for a motor control module
A motor control module designed to control operation of a plurality of different motors in a plurality of different tools a power tool uses an electronic clutch in the module in conjunction with a...
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7545056 |
Saturation control of electric machine
The invention includes an electric alternator/motor having a rotor, stator and at least one winding in the stator adapted to conduct a current, the machine also having and first and second magnetic...
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7545613 |
Method of controlling seatbelt retracting device with motor
In controlling a seatbelt retracting device having a mechanism for retracting a seatbelt with a motor, a current flowing to the motor is detected, and a rate of increase in the current is...
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7542251 |
Auto-protected power modules and methods
A linear power controller system may be implemented that includes locked-rotor protection circuitry that is primarily assembled using analog circuit components. The locked rotor protection...
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7538992 |
System, device, and method for over-current relays protecting motors
A system, method, and device for protecting an induction motor are disclosed. The exemplary system may have a module for determining the current drawn by the motor and a module for determining the...
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7535684 |
Overspeed protection for sensorless electric drives
Overspeed protection of sensorless electric drives is needed in the aerospace industry. Methods for overspeed protection may include software implementations, hardware implementations or...
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7531983 |
Method of controlling startup current of motor and disk drive using the method
Provided is a method and apparatus for controlling a motor of a disk drive. The method is used to stably control the startup current of a motor by considering a voltage drop and the disk drive uses...
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7518838 |
Protection of variable frequency power systems from excessive peak electrical potentials
A method of protecting an electromechanical power transfer system from excessive peak electrical potentials, the power transfer system comprising a prime mover, a dynamoelectric machine coupled to...
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7518837 |
Control device for soft starting and protecting overload of motor
A control device for soft starting and protecting overload of a motor in a power tool is disclosed. The control device comprises a power switch, a varistor, several diodes, several resistors,...
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7504793 |
DC motor driving method for reducing adverse RF interferences and application to a vehicle lighting or signaling device
The invention concerns a method of controlling a control circuit, which comprises a step in which a variation in a control parameter for the control circuit is effected, said variation being...
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7489483 |
System and method for look ahead detection of electrical problems at a motor of a vehicle
A system for sensing short circuits and open circuits prior to operation of a motor (i.e., while the motor is in a static state), thereby sparing the electrical system from destructive effects of...
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7489484 |
Protective device for a controlling system of a sewage pump
A protective device for a controlling system of a sewage pump has a protective circuit to protect a start capacitor and to avoid the start capacitor from burnout when an overload is occurred by...
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7486490 |
Actuator for the actuation of a clutch and/or a gear mechanism
An actuator for a clutch or gear mechanism in a motor vehicle comprises an electric motor and an incremental encoder. The encoder comprises a position measurement signal output at which a position...
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7486489 |
System and method for speed control and stall protection combination for electric motors such as in engine cooling applications
A speed control and stall protection system 10 for an electric DC brush motor includes a DC brush motor M. At least one relay K 3 is connected between the motor and a power supply. A speed...
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7477493 |
Alternator control device for vehicle
A vehicle alternator control device in which, when a signal detection portion detects a determined input signal, an operating mode of an overvoltage warning portion is switched to a detection...
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7474070 |
Electric power steering apparatus
A torque detection portion includes a first arm having a detection coil L 1 and a resistor R 1 , and a second arm having a detection coil L 2 and a resistor R 2 . When a test mode is set, a...
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7463464 |
Method and apparatus for sensing brushless DC motor average current from overcurrent protection circuitry
A method and an apparatus that permit the measurement of the motor average current directly from the output of the amplifier and filter stage used for instantaneous dc-link overcurrent protection....
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7459814 |
Hybrid induction motor
The hybrid induction motor includes a housing; a stator installed in the housing and having a stator core portion and a stator coil portion; a rotor coupling body having a rotary shaft rotatably...
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7451256 |
Portable system for programming hearing aids
A hearing aid programming system with a host computer for providing at least one hearing aid program and having at least one personal computer memory card international association (PCMCIA) defined...
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7450355 |
Power supply apparatus with function of detecting abnormality of current sensor
A current detector ( 60 ) samples a motor current (MCRT_A) from a controlling sensor and a motor current (MCRT_B) from a monitoring sensor, and holds respective motor current maximum values...
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7450356 |
Rotation speed controller for fans
A specially designed rotation speed controller for fans, in addition to basic components like variable resistor, the controller has also been equipped with special components such as TRIAC, micro...
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7446491 |
Intelligent power management for actuators
A system and method is disclosed for intelligent power management of actuators such as those used in papermaking. Multiple power supply units are connected to a common power bus. The power bus is...
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7446989 |
Device for protection of the bearing of an electrical machine against damaging passage of current
A device for protecting the bearing of an electrical machine against the damaging passage of current, wherein the electrical machine comprises a stator and a rotor pivotally mounted relative to the...
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7443642 |
Electric motor control
A method and apparatus is disclosed for controlling a system comprising at least one electric motor. The system includes aspects which permit, among other things, electromagnetically disconnecting...
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7433164 |
Ceiling fan motor control module
A ceiling fan motor control module includes a digital core controller coupled to a brushless motor for computing, processing, transmitting and controlling signals and providing a soft start and...
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7426099 |
Controller method, apparatus and article suitable for electric drive
A control system, method and article allows a monitoring module to monitor operation of a main controller in an electric drive, by providing questions and evaluating the accuracy and/or timeliness...
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7425805 |
Three-in-one control device for a ceiling fan
A three-in-one control device for a ceiling fan includes a signal receiving module, which is able to receive segmented controlled signals, stepless controlled signals and wireless controlled...
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7417388 |
Running machine with wheels
A running machine that can prevent overturning of a body in the case of occurrence of an abnormality is provided. The running machine substantially supports the body with coaxially arranged drive...
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7400104 |
Voltage converting device, computer readable recording medium with program recorded thereon for causing computer to execute failure processing, and failure processing method
A control device detects whether or not an up-converter fails, based on a DC voltage from a voltage sensor, an output voltage from a voltage sensor, and a duty ratio in controlling switching of NPN...
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7397222 |
On-line testable solid state reversing DC motor starter
A solid state reversing DC motor starter that is testable on-line and satisfies the requirements for nuclear safety grade equipment. The motor starter employs a bridge of solid state switches which...
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7394629 |
Motor overload tripping system and method with multi-function circuit interrupter
A technique is provided for controlling operation of motors of different sized or ratings. Components used to apply and interrupt current to the motors may be shared in control devices for the...
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7385795 |
Cordless power tool with a protected weak link element
A method consistent with an embodiment may include selecting one of a plurality of components of a power supply system of a cordless power tool to be a protected weak link element. The method may...
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7383133 |
Diffuse seismic imaging systems and methods
Systems and methods are disclosed to construct subsurface images from diffuse seismic energy. Various disclosed system embodiments include multiple seismic sensors that each convert received...
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7375934 |
Power converter controlling apparatus and method applying a fault protection scheme in a motor drive system
A method and apparatus control a power converter ( 20 ) of a motor drive system. The power converter ( 20 ) is controlled during a first operating mode by applying a current control scheme, which...
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7372676 |
Motor coil-shorting detecting unit
In order to be acceptable for safety critical applications, it is necessary for an electrical machine to allow continued operation despite an electrical short circuit in one of the operational...
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7372686 |
Power supply apparatus capable of detecting abnormality in current flowing in drive circuit
A current detection unit samples motor current at every cycle corresponding to a cycle of the highest processing speed of a CPU. A current integral calculation unit integrates the value of the...
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