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7623328 |
Driving control apparatus for motion mechanism and control method of driving control apparatus
When a variable valve mechanism which varies an opening characteristic of an engine valve is malfunctioned, the power supply to a drive circuit for the variable valve mechanism is stopped, and also...
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7623327 |
Motor protective device
A heating value calculation part obtains a substantial heating value based on the difference between a heating value and a radiating value attributed to a motor supply current. The radiating value...
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7622874 |
Over current detection circuits for motor driver
A motor driver includes an H-bridge having a first differential input, a second differential input, and a differential output; a sensing circuit coupled to the differential output of the H-bridge;...
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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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7589942 |
MEMS based motor starter with motor failure detection
A motor starter is disclosed. The motor starter includes control circuitry integrally arranged with at least one current path and a processor included in the control circuitry. The motor starter...
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7586285 |
Ground fault detection device for motor driving circuit
A motor driving circuit includes an inverter circuit including switching devices connected in a bridge manner, electric-current detection resistances connected between the lower switching devices...
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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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7561389 |
Alternating-current voltage output apparatus
Inverters, based on signals from a control device, generate a commercial AC voltage across neutral points of 3-phase coils. A Y-capacitor for removing noise is connected to a load outside the...
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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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7542250 |
Micro-electromechanical system based electric motor starter
A motor starter is provided. The motor starter includes micro-electromechanical system switching circuitry. The system may further include solid state switching circuitry coupled in a parallel...
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7538508 |
Thermal overload protection
A thermal overload protection for an electrical device, particularly an electric motor (M), measures a load current supplied to the electrical device (M), and calculates the thermal load on the...
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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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7525273 |
Robot control system
A robot control system including a servo amplifier supplying power to a robot, a processor controlling the operation of the robot, and a servo power connection/cutoff circuit connected to the same,...
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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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7508637 |
Antilock system for a permanently excited electric motor drive
As an antilock system for a permanently excited electric motor drive, especially for a steering booster servo drive of a motor vehicle, in the event of a winding short-circuit, an interruption of...
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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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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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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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7403360 |
Central vacuum cleaning system control subsystems
A central vacuum cleaning system control subsystem for use in a central vacuum cleaning system having a motor includes a central vacuum unit control module with a receiver for wirelessly receiving...
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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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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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7352546 |
Motor overcurrent protection device
A motor overcurrent protection device connectable to a motor. The motor has a rotary shaft and a controlling port. The motor overcurrent protection device includes a sensing unit, a driving unit...
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7352545 |
Compressor terminal fault interruption method and apparatus
A compressor terminal fault interruption method and interrupter for disconnecting power to a compressor terminal when terminal venting failure is imminent including a current sensing circuit for...
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7336456 |
Control-motor system
An objective is to detect a resolver malfunction without fail, using a low-cost resolver having the small number of the poles, and a control-motor system having advantage in small sizing and...
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7307676 |
Liquid crystal display module
A liquid crystal display module arranged to improve brightness and light efficiency of a direct-below-type back light unit. The liquid crystal display module includes a plurality of lamps; a...
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7301737 |
Motor power line break detection method in AC servo driver
An object of the invention is to provide a break detection method capable of lessening a delay of motor power line break detection. According to the invention, in a motor power line break...
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7276871 |
System and method for fault protection for permanent magnet machines
A fault protection system and method of fault protection for permanent magnet machine (PMM)-based systems that utilize machine neutral decoupling (MND) to shut down a shorted winding and/or to...
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7268988 |
Apparatus and method for detecting rotation
In a rotation detection apparatus, a rotation-angle detector detects a rotation angle of a rotating body based on an output signal generated by a resolver. An exciting-signal generation circuit...
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7224557 |
Method and system of controlling asynchronous contactors for a multi-phase electric load
Control of an induction motor is carried out to limit damaging arcing stress and mechanical stresses placed on the control contactor assembly and the induction motor resulting from the simultaneous...
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7215518 |
Motor power supply line breaking detection method, motor control apparatus and electric power steering mechanism using the same and computer program thereof
According to the breaking detection processing, it is determined that (A) iu of AC current (absolute value) supplied to a motor is less than 0.5 amperes or iv thereof is less 0.5 amperes or iw...
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7193382 |
Apparatus for detecting over current of motor in vehicle
An apparatus for over current detection of a motor for use in a vehicle. This invention prevents the motor from burning out by more precisely detecting an over current of the motor within an...
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7175175 |
Driving apparatus, sheet processing apparatus having driving apparatus, image forming apparatus having sheet processing apparatus and control system
A driving apparatus includes a plurality of driving devices; a plurality of malfunction detectors for detecting a malfunction of the driving devices; a plurality of electric current setting devices...
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7142125 |
Fan monitoring for failure prediction
A method for monitoring a fan comprises measuring power usage of the fan, determining a derivative of the measured fan power usage, tracking the derivative over time, and predicting impending fan...
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7119520 |
Energy storage flywheel test control system
A system and method for removing energy from the rotating group in an energy storage flywheel system during flywheel system testing includes one or more sensors is operable to sense operational...
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7113376 |
Motor control apparatus
In a control apparatus for a motor, an over-current protection circuit detects an abnormality in a motor current forcibly turns off a MOSFET. The over-current protection circuit has a timer...
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7109680 |
Inverter device
An object is to provide an inverter device capable of realizing exact protection of the winding of a motor. An inverter device for generating a pseudo alternating current by switching a direct...
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7102314 |
Brushless motor control apparatus having overheat protecting function
A brushless motor control apparatus detects a phase current flowing in a brushless motor, converts the phase current to a vector current including a d-axis current of a magnetic flux direction...
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7084609 |
Alternator controlled rectifier
A system and method for controlling the voltage output of an alternator is disclosed. The system includes an alternator having a rotor, which has a field winding, a stator having a plurality of...
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7050278 |
Motor controller incorporating an electronic circuit for protection against inrush currents
Inrush currents in the dc intermediate circuit of a motor controller necessitate the incorporation of protection circuits. These circuits usually take the form of a resistor inserted in series with...
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7032397 |
Thermostat for use with compressor health indicator
A method of operating a climate control system includes generating a signal based upon the operation of the compressor, and controlling the compressor in response to the generated signal. A climate...
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6995964 |
Combination-type motor control with extended current range
A motor control technique is disclosed in which a first algorithm controls interruption of power to a motor in a first current range. A second algorithm controls interruption of power in a second,...
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6992458 |
Emergency stop circuit
Two emergency stop lines are provided. Due to contacts being opened by commands from emergency stop factors and from first and second CPUs, conducting to first and second contactors are stopped....
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6950029 |
Airflow blockage detection apparatus for a permanent split-capacitor single-phase fan motor
An airflow blockage detection apparatus for a permanent split-capacitor single-phase cooling fan motor measures and compares electrical currents in main and auxiliary windings of the motor to...
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6768623 |
IC excess current detection scheme
The present invention achieves technical advantages as a circuit ( 10 ) detecting excess current on a servo driver IC and preventing the disruptive damage which can be caused by the excess current....
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6759823 |
Fail-safe mechanism for dc-drive
A brushless d.c. drive including a synchronous motor, including a multiphase armature winding, a switching device controlled by an electronic controller and connected upstream from the armature...
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6720749 |
Three-phase motor protector apparatus
A three-phase motor protector uses two toroids to monitor all three phases of a three-phase motor. Current and phase loss are monitored directly in phases A and B while the phase C current level is...
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6718273 |
Methods for simplified field-oriented control of asynchronous machines
A method for generating manipulated variables for the direct-axis and cross voltage, respectively, to represent the flux-forming current ID and torque-forming current IQ in field-oriented control...
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6717384 |
Frequency changer protection circuit for controlling the acceleration of an electric vehicle
A frequency regulator protection circuit for controlling acceleration of electric vehicle comprises a power unit, a display unit, a protection unit, a control unit, a sensor unit, a data processor...
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6710988 |
Small-sized industrial rated electric motor starter switch unit
A molded case electric switch housing includes an electric switch control circuit for motor overload and phase loss conditions, a motor contactor control circuit for turning an associated electric...
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