|
Match
|
Document |
Document Title |
|
|
7596304 |
Starting device and method for eliminating a peak current
Disclosed is a starting device and method for eliminating a peak current introduced when an inductive circuit such as a motor or a direct-current (DC) motor is actuated, The starting device...
|
|
|
7545109 |
Method and apparatus for monitoring an electrical energy storage device
A method and article of manufacture for monitoring an electrical energy storage device adapted to supply electrical power to a selectively actuable electric motor is described. This comprises...
|
|
|
7529608 |
Vehicle drive control device
A drive control device is provided with a determining section and a voltage increasing section. The determining section determines if the actual acceleration is deficient in comparison with the...
|
|
|
7508150 |
Electric motor controller
The rotational speed of a motor is detected, and stored in a rotational speed memory. The difference between the present rotational speed output and each of plural past rotational speeds stored in...
|
|
|
7454127 |
Multi-speed motor system combining at least a one speed electric motor, series resistor and power switches
A multi-speed permanent magnet D.C. electric motor system 10 includes at least one permanent magnet DC electric motor 11 configured to operate at at least one speed. A current limiting device R...
|
|
|
7369757 |
Systems and methods for regulating power in a medical device
A system for controlling a motor for use in a ventilation system may include a motor, a voltage adjustment system, a user interface, and a motor controller. The voltage adjustment system may be...
|
|
|
7274865 |
General purpose 100% solid state drive for direct current rotary machines
General purpose 100% solid state Direct Current drive for rotary DC machines with four quadrants operation. It is to say that allows the rotary DC machine to act like motor or generator in the two...
|
|
|
7259531 |
Speed control of brushless DC motors
The speed control apparatus comprises a plurality of Hall sensors, a plurality of switches, a turn-on control circuit, and a gate drive logic. The Hall sensors are configured to detect magnetic...
|
|
|
7230358 |
Electrical resonance circuits for high efficiency direct current motors
Practically ideal electrical resonance is employed to soley provide armature power, and stator power if desired, to run DC motors. A practically ideal parallel resonant tank circuit (PIPRC) is used...
|
|
|
7145311 |
Vector control device of winding field type synchronous machine
A vector control device of a winding field type synchronous machine with which even when voltage changes caused by resistance voltage falls and inductance fluctuations due to armature current occur...
|
|
|
7133603 |
Motor driving apparatus, digital camera, and motor controlling method
A motor driving apparatus includes a power circuit that controls an output voltage via a feedback resistance. The power circuit varies the output voltage by changing a value of the feedback...
|
|
|
7133602 |
Power supply apparatus, motor drive control method using the same and motor vehicle having the same mounted thereon
A power supply apparatus driving and controlling motor generators (MG 1 , MG 2 ) includes a battery ( 10 ) generating an input voltage (Vb), a converter ( 110 ) converting the input voltage into a...
|
|
|
7068923 |
Speed control apparatus of motor
A speed control apparatus includes a speed control part 12 for generating a source current command based on a difference between a speed command of a motor 4 and speed detection in which a...
|
|
|
7062159 |
Device for correcting a digital estimate of an electric signal
A device for correcting a digital estimate of an electric signal is described. The device includes a comparator that generates a current proportional to the difference between an analog estimate...
|
|
|
7042227 |
Current determination in a permanent magnet electric machine
A method and system for determining a torque current in an electric machine coupled to a polyphase bus. The method comprises: detecting a rotational position of the electric machine with a position...
|
|
|
6979964 |
Apparatus for applying DC power to an inductive load
Apparatus including a DC-DC converter that applies a variable voltage to an inductive load, such as a fan motor. The converter has a low-frequency high dynamic output impedance and applies a...
|
|
|
6977477 |
Systems, apparatus, and methods for motor control
Systems and methods are provided through which the current to a spindle motor of the recording medium of a mass storage device is modulated to avoid anomalies in the operation of mass storage...
|
|
|
6970643 |
Radiator having a fan in variable rotation speed
A radiator includes a voltage regulator for providing a reference voltage, a fan including a power end connected to the reference voltage via a first resistor and a feedback end for outputting a...
|
|
|
6895175 |
Electrical control circuit and method
Systems, methods, and apparatus, consistent with principles of the present invention, allow an unmodified device, for example, a dc starter motor, that normally operates at a first voltage to...
|
|
|
6891347 |
Cooling fan control based on cabinet intrusion
Various systems and methods are provided for cooling a cabinet. In one embodiment, a method is provided that comprises the steps of controlling a speed of the at least one cooling fan in response...
|
|
|
6879120 |
Speed control circuit of brushless DC fan motor
There is provided a brushless DC fan motor which can eliminate an oscillator for PWM, control the motor speed at a low cost with high accuracy, and efficiently adjust the temperature in a housing...
|
|
|
6838842 |
Method for operating a brushless direct current motor
A brushless, synchronous direct current motor is operated by supplying a direct current voltage as an input voltage for commutating the motor phase windings. The speed of the synchronous motor is...
|
|
|
6823132 |
Method and apparatus for controlling motor
In controlling a motor in a device which drives a mechanism using the motor as a power source, pre-driving of giving a predetermined driving parameter to the motor and driving the mechanism is...
|
|
|
6822411 |
Method and apparatus for controlling motors
Control of a motor in a device in which a mechanism is driven using the motor as the power source is achieved by providing velocity servo-control means for outputting first command information...
|
|
|
6759820 |
Arrangement for supplying a user, especially a D.C motor, that consumes power in a non-continuous manner from a D.C. system
The invention concerns an arrangement for powering a load ( 12 ) that has non-continuous power consumption from a DC power supply (UB). The arrangement has a DC link circuit ( 14, 22 ) to which...
|
|
|
6707385 |
DC motor rotation speed alarm circuitry
DC motor rotation speed alarm circuitry includes an input node, a connection node, a ground node, a comparison circuit and a signal generator. When the rotation speed of the DC motor changes during...
|
|
|
6703803 |
Fan motor driving circuit
A fan motor driving circuit of the present invention comprises a device for detecting a power source voltage and outputting a voltage in proportion to a difference between the power source voltage...
|
|
|
6696811 |
Method for regulating an electrical machine by means of a pulse-width modulation inverter
The invention relates to a method for regulating an electrical machine ( 1 ) with an excitation winding ( 2 ) and a stator winding ( 3 ). The stator winding ( 3 ) is connected at its output...
|
|
|
6646410 |
Method and apparatus for the improved control of motors and of motor-actuated work apparatus
Disclosed is control circuitry for providing controlling a motor responsive to feedback signals. The control circuit includes a velocity sensor for coupling with the motor for providing a velocity...
|
|
|
6633145 |
Circuit for improved back EMF detection
A system and method of advancing the commutation sequence of a brushless DC motor is provided. The motor having a plurality of coils, each of the coils coupled together at one end to a common...
|
|
|
6633144 |
System and method for measuring parameters of a DC motor field
A system and method determine the parameters of a field of a DC motor. The method comprises obtaining parameters of the DC motor; and performing an iterative processing loop, the iterative...
|
|
|
6580874 |
Field current control method in motor
In separately excited DC brush motors ML and MR, an armature current control circuit for feeding power to armatures 61 and a field current control circuit for feeding power to a field system 62 ...
|
|
|
6556778 |
Active current-limiting control for dc motor speed regulation
A motor controller for regulating the speed and limiting the input current to a dc motor is disclosed. The motor controller includes an electronic control unit, a current sensor and a speed sensor....
|
|
|
6518719 |
Power tools with operating speed control circuit
A variable speed power tool may include a speed adjusting device and/or a maximum speed adjusting device for adjusting the operating speed, and a fixed operating speed switch. An operator...
|
|
|
6515443 |
Programmable pulse width modulated waveform generator for a spindle motor controller
A motor controller for a three-phase spindle motor used in the hard disc drive provides pulse width modulated (PWM) signals used to drive the motor. The PWM signals have duty cycles which are a...
|
|
|
6509705 |
Power supply for DC motors
A power supply for DC motors, in particular for actuators for use in the adjustment of tables, beds and the like, comprises a transformer (T 1 ) with a rectifier (D 1 -D 4 ); and a buffer...
|
|
|
6456028 |
Pulse generating circuit for driving DC motor
A pulse generating circuit for motor rotation of a direct current motor which is capable of pulse generation following the variation of the motor rotation condition and of stable ripple pulse...
|
|
|
6438321 |
Control of high speed DC motor vertical voltage vector component
A motor controller utilizes sensors to detect the rotational speed and relative position of the motor rotor and generates a voltage vector to maintain the motor current in phase with the EMF before...
|
|
|
6424107 |
Apparatus and method for controlling an electric motor
An apparatus ( 10 ) for controlling an electric motor ( 36 ) having a plurality of motor phases includes a motor controller ( 32 ) that controls energization of each phase of the plurality of motor...
|
|
|
6408130 |
Electric drive system with an electronically commuted DC motor in order to reduce torque irregularities
The invention relates to an electric drive device with a DC motor ( 2 ) comprising a control circuit with an electronic commutator ( 3 ). The invention is characterized in that a derivation of a...
|
|
|
6385555 |
Method and device for determining the rotational speed of a polyphase machine operating with field orientation and without a sensor
The invention relates to A method for determining a rotational velocity of a transducerless polyphase machine that is operated in a field-oriented manner, a stator-current model space vector and a...
|
|
|
6291952 |
Method and circuit arrangement for operating an electromagnetically actuated mechanical brake of an electric motor
Electric motors, in particular geared motors, are often equipped with electromagnetically actuated mechanical brakes. In order to ensure that an excitation coil (3) can be operated with...
|
|
|
6288513 |
Rotor position detection in switched reluctance machines
A polyphase switched reluctance machine is controlled by a control system using sensorless position detection. A method of operating the machine at high speeds interrogates every nth phase...
|
|
|
6288507 |
Motor drive circuit
A motor drive circuit is comprised of an H-bridge circuit which is formed of a flywheel diode and a switching device and connected to a motor coil; a current detecting circuit which is connected to...
|
|
|
6286609 |
AC/DC chopper for power tool
A dual-mode system for inexpensively operating electrically powered double-insulated devices (12), such as hand-held power tools and appliances. The system includes a cordless battery power module...
|
|
|
6285148 |
Energization control device for electric motor
An energization control device for an electric motor includes: a rotor angle sensor for detecting a motor rotational angle; a current sensor for detecting a current flowing through a phase coil; a...
|
|
|
6278254 |
Programmable and interactive motor starter
An apparatus comprised of a processor, a display, and a current measuring device is provided. The current measuring device is adapted to measure the current in a first winding of a first stator of...
|
|
|
6274992 |
Braking method for a single-phase motor
The specification discloses a braking method for a single-phase motor, which is applied to a single-phase DC brushless motor driven by a three-phase motor driving IC. The invention uses a control...
|
|
|
6268708 |
Control apparatus for electric power steering system
In control devices of electric power steering systems, steering characteristics are improved by control being carried out by means of a signal based on rotor speed or steering angle after failure...
|
|
|
6262557 |
Motor with electronic distributing configuration
First power transistors of first power amplifying parts and second power transistors of second power amplifying parts form current paths from a DC power source to three-phase windings. A first...
|