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7615959 |
Apparatus and method for controlling brushless DC motor
Disclosed is a control apparatus for a brushless DC motor, which has a rotor with n poles (where n is a natural number) that rotates due to a supply current with m phases (where m is a natural...
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7589487 |
Method of selectable simultaneous/sequential motor drive in a multiple drive circuit including failure detection
A system and method is provided for improved monitoring and controlling of mechanically commutated DC motors. The system and method include DC motors, pulse-count driver circuitry for driving the...
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7586283 |
Magnetic encoder device and actuator
Provided is a magnetic encoder device capable of detecting a rotating angle of an actuator having a cavity structure. The magnetic encoder device includes a ring-shaped rotating body 11 , a...
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7545110 |
Motor drive control
A drive system for a multi-phase brushless motor comprises a single current sensor drive circuit, including switch means, switchable between a plurality of states. A controller is arranged to...
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7518324 |
Universal motor speed controller
Moderately accurate closed loop speed control of a universal motor is attained without the need for any type of speed sensor. Motor armature (across the brushes) voltage is sensed and supplied to a...
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7508154 |
Integrated motor and resolver including absolute position capability
An integrated motor and position sensor achieves motion between a moving portion and a stationary portion by electrically energizing poles to interact with magnetics respectively on the moving and...
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7489260 |
Resolver hall decoding circuit
A device for converting position data to Hall code data includes a data input for providing the position data, a data output for providing the Hall code data, a first adder circuit operative to...
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7466090 |
Apparatus, software and method for controlling the operation of a window covering
Systems, methods, apparatus, computer readable mediums and propagated signals are provided for controlling the position, orientation, movement, configuration and/or operation of one or more window...
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7417411 |
Apparatus and method for monitoring tap positions of load tap changer
A load tap changer (LTC) having a plurality of windings is coupled to one of the primary and secondary windings of a power transformer in order to regulate the output voltage of the power...
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7397207 |
Electric supercharger for vehicle
The electric supercharger includes a vehicle connector, an impulse signal generator empowered by a power source, and a signal amplifier. The vehicle connector has a positive terminal and a negative...
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7377379 |
Transport belt drive control device, image forming device, and transport belt drive control method
In a transport belt drive control device, a first detection unit has a first resolution and indirectly detects a feed amount of a transport belt, a control unit controls drive of the transport belt...
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7375487 |
Geared motor
A motor encoder is mounted on a motor shaft of a geared motor 1 , and the origin position is detected by using a Z-phase signal. An absolute value encoder with a precision that allows the number...
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7323838 |
Motor control method and device thereof
A motor control method and device. The motor control device includes a programmable integrated circuit (IC) receiving a phase signal, the phase of which is consistent with the rotation phase of a...
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7319303 |
Method and apparatus for estimating the position of a moving part of a linear actuator
A method and an apparatus for estimating the position of a moving part of a linear actuator are provided. The method comprises the following steps. Move the moving part towards a target position....
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7317294 |
Pulse generator and method thereof
A pulse generator and method thereof. The pulse generator may include a first switching unit receiving a plurality of receiving a plurality of time interval indicators and a first selection signal....
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7312590 |
Model railroad velocity controller
Control over velocity of a model train may be determined based upon the speed of rotation of a control knob. A processor receives electronic pulses indicating rotation of the knob beyond a...
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7288913 |
Drive wave generation circuit
Two standard waves from a standard waveform generation circuit are output via an output gate while being interchanged by a direction selector. The switching operation of the direction selector is...
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7271558 |
Method for the generation of electrical pulses
In rotating systems with angular references, angular- and/or time-based pulses must be generated which can be described in a generic manner to meet various requirements. The parameters for...
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7221114 |
Conveyance control apparatus and image forming apparatus
A conveyance control apparatus controls an amount of movement of a carrier. A first encoder detects an amount of movement of the carrier and outputting a first signal. A second encoder detects an...
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7208907 |
System and method of restarting a switched reluctance motor after a rapid cycling of power
A system and method of restarting a switched reluctance motor after a cycling of power provided to the motor is provided that includes receiving at the motor a power-off signal followed by a...
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7196489 |
Rotary shaft control apparatus
The invention aims to suppress or prevent the vibration that can occur due to the intervention of a low-rigidity part between detector and rotating body. An angular acceleration sensor for...
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7183731 |
Pulse generating method and pulse generator, and motor control system using the same
A method of generating pulses includes setting a cycle based on a frequency of reference clock, determining a total number of the pulses to be generated during the cycle, calculating the number of...
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7180255 |
Controlling the release of a brush motor which has applied a load
A method for controlling the release of a brush motor which has applied a load includes several steps. One step includes applying a release current to the brush motor to rotate the brush motor in a...
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7135831 |
Method and device for controlling motor
A motor control method is provided in which a cycle between at least one of leading edges and trailing edges of a pulse signal is measured. The pulse signal is outputted from a pulse signal...
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7132814 |
Method of calculating correction value and method of manufacturing printer
A correction value calculating method includes: preparing a printer including a motor, a PID control system for controlling the motor, and a memory for storing a correction value, the printer being...
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7088070 |
Resonant scanning mirror driver circuit
A resonant scanning mirror driver configured to drive a micro-electro-mechanical system (MEMS) mirror to a desired deflection utilizes a PWM pattern selected from patterns having a preset number of...
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7075262 |
Print control system, print control method, and recording medium having recorded print control program
A print control system according to the present invention comprises: a paper rear edge holding/driving control part for driving and controlling a paper feed motor so that the rear edge of a paper,...
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7049778 |
Inverter control apparatus and inverter control method
An interrupt signal is generated at each of rising timings of PWM signals which are produced on the basis of phase-shifted triangular wave carrier signals for phases, and voltage command values for...
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7049771 |
Multi-phase carrier signal generator and multi-phase carrier signal generation method
A carrier signal generation section is provided for each of U, V, and W phases, and each of the carrier signal generation sections has an up-down counter for counting clock signals output from a...
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7050885 |
Pulse count accumulator for pulse count motor control system
A pulse count accumulator includes a plurality of counters and a communication port. The plurality of counters are each coupled to a different one of a plurality of actuators and a value of each of...
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7042190 |
Motor control apparatus and motor control method
A control device measures time intervals T 1 to T 12 from the reference time until when each of the rotational angles θbn 1 , θbn 2 output from each of resolvers becomes n×60 degrees (n=1 to...
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7038420 |
Method of regulating an electric motor and corresponding electric motor
A method of regulating an electric motor, regulation being implemented with a loop of gain less than unity as a function of a divergence between a setpoint signal for an operating parameter of the...
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7038407 |
Circuit arrangement and method for operation of an electric motor in a DC supply network
The invention relates to a circuit arrangement and a method for operating an electric motor in a direct voltage source, in particular for operating a permanent-magnet-excited DC motor in the direct...
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7034490 |
Motor positioning servo loop using oversampling bitstream DAC
A Hard Disk Drive VCM positioning servo loop comprises an oversampling bitstream Digital to Analog converter. The oversampling DAC is a sigma-delta converter which yields higher resolution and...
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6983102 |
Motor control device for vehicular power mirror
When a signal level of a motor brush switching signal is low and thus dropouts or omission of the pulse signals converted by a waveform shaping part take place, so that an interval between a pulse...
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6967459 |
Method for controlling or regulating the current in a direct current machine for a fan
The invention concerns a method of regulating the current in a direct current machine with which are associated an arrangement for generating a current target value signal, as well as a PWM...
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6956343 |
Method of controlling a physical variable in an electronically commutated motor, and motor for carrying out said method
In a method for controlling a physical variable in an electronically commutated motor, current is supplied to the stator winding arrangement ( 102 ) of the motor in the form of current blocks. The...
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6911798 |
Rotation angle detecting apparatus for synchronous rotary electric machine
A rotation angle detecting apparatus for a synchronous rotary electric machine includes an incremental encoder. The incremental encoder generates an index pulse each time electric power is supplied...
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6912427 |
Programmable limit switch with distributed intelligence
A programmable limit switch includes output channels for receiving position data, each position value of the position data representing an incremental advance of a workpiece through a production...
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6876167 |
Method and apparatus for determining the rotational rate of a rotating device
A non-invasive apparatus and method for measuring the speed of a rotating device that includes a sensor that measures a dynamic characteristic of the rotating device. A sample of the signal is...
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6853161 |
Recording apparatus, motor control apparatus, and motor control method
A motor control apparatus which can improve detection accuracy of control information and stabilize a control system includes a detector for detecting first pulse information which corresponds to...
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6841954 |
Apparatus and method used in disk drive for driving spindle motor
A CPU sets an SPM driver in SPM start-up mode when a SPM is started up. At this time, a voltage selector applies, to a driver circuit, a voltage (high voltage) boosted by a voltage booster. A...
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6822415 |
Motor controller
A electric motor control device is provided for controlling an electric motor which actuates a movable member of a machine through a transmitting mechanism. When a torque command is given as motion...
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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...
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6819074 |
Apparatus and method of controlling a driving speed of a motor
An apparatus for controlling a driving speed of a motor comprises a motor controller provided in the motor controlling apparatus detecting the motor driving speed in response to pulses outputted...
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6809489 |
Print control unit and print control method, and storage medium storing print control program
There is provided a print control unit capable of transferring and stopping an object to be controlled at a target position when unexpected load is applied to the object. A print control unit...
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6809492 |
Speed control device for AC electric motor
A speed control apparatus of an AC motor a first subtracter 1 for finding toque component voltage saturation amount ΔV q from torque component voltage component V q ′ output from a torque...
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6798156 |
Method for minimising the phase errors during the driving of an electric motor, and a circuit using the method thereof
The present invention relates to a method and a circuit using the method thereof for minimising the phase errors during the driving of an electric motor, and a circuit using the method thereof,...
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6791293 |
Sensorless control device for synchronous electric motor
The invention provides a synchronous motor sensorless controller which drives a synchronous motor without use of a rotational position sensor. The controller has a relative position counter 4 ...
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6768282 |
Method for detecting the rotational position of the drive shaft a dc motor
A method for determining the rotational position of the drive shaft of a DC motor includes providing a period of a reference current ripple indicative of proper operation of the motor. The period...
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