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7944157 |
Dual ring dedicated drive control system for medium voltage variable frequency drives
The present invention provides a motor drive system that is substantially more robust than those of the prior art. Generally, the motor drive system provides a redundant communication topology with...
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7915850 |
Apparatus and method for controlling servomotor of electric injection molding machine
An apparatus and method for servomotors of an electric injection molding machine includes a motion controlling unit, two driving amplifying units, and two servomotors respectively connected to the...
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7836713 |
Speed control of multiple components in refrigerant systems
Variable speed drives are utilized in refrigerant systems to operate motors of the system components at varying speeds, typically for the purposes of capacity adjustment, efficiency enhancement,...
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7761192 |
Complex signal processing system and related method for controlling multiple fans
A complex signal processing system for multiple fans is used to control the rotation of a first fan and a second fan. The speed signals of the first fan and the second fan are processed through an...
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7715964 |
Very low speed vehicle control algorithm operating in the spatial domain
A method of operating a vehicle at a substantially low speed based on change in the vehicle position. The method comprises the following steps: (A) transforming a steering control algorithm into a...
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7661274 |
System and method for capacity control in a multiple compressor chiller system
A capacity control algorithm for a multiple compressor liquid chiller system is provided wherein the speed and number of compressors in operation are controlled in order to obtain a leaving liquid...
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7598687 |
Method and control unit for controlling fan motors
A method for controlling a first fan motor using a first pulse width modulation signal having a first pulse control factor, and for controlling a second fan motor using a second pulse width...
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7550936 |
Fan motor drive control apparatus
A fan motor drive control apparatus comprises a plurality of drive circuits for driving respectively a plurality of fan motors, and a speed change-over control circuit for transmitting a control...
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7174731 |
Rotational speed control system, rotatingly driving system, air blow system, clean bench, outdoor unit of air conditioner
This invention relates to a rotational speed control system including a plurality of motor drivers for driving motors, and the object thereof is to drive a plurality of motors at the same...
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7132809 |
Fan-controlling system to control a plurality of fans with different pulse width modulation signals
A fan controlling system applicable in an electronic system having a plurality of fans is disclosed. The fan-controlling system includes a first signal generating module and a second signal...
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7034481 |
Power transmission device for hybrid vehicle
To provide a power transmission device that can increase the range of speed variation between an engine and a power output shaft and effectively achieve reduction in size and cost of the device...
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6933687 |
Dual motor configuration with primary brushless motor and secondary integrated speed control motor
A dual motor configuration 10 is provided for driving two fans for moving air to cool an engine. The dual motor configuration includes a primary brushless motor 18 constructed and arranged to be...
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6809484 |
Multiple electronically commutated motor control apparatus and method
A cooling system includes multiple cooling fans, each driven by a corresponding fan motor controller. Each fan motor controller includes electronic commutation circuitry that is responsive to a...
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6734644 |
Control method for wiper apparatus
A method (and apparatus) includes that a duty ratio of a driving voltage output to each wiper motor be required to be set according to several conditions. That is, while each wiper blade is moved...
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6724161 |
Image forming apparatus and control method of motor therein
The invention concerns an improvement of a drive system of a color image forming apparatus. The color image-forming apparatus includes a plurality of image-forming elements; a plurality of first...
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6658335 |
Method and apparatus for motor velocity measurement compensation in electric power steering damping
A method for generating a compensated torque command signal to be applied to an electric power steering motor is disclosed. In an exemplary embodiment, the method includes generating an assist...
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6313591 |
Delay time modeling filter for cascaded regulator structure
A control system controls the movement of an object based on desired position data. The control system includes a first regulator configured to regulate the position of the object, a feed forward...
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6226582 |
Integrated control for electric lift trucks
A control system for an electric lift truck that controls a traction motor and a hydraulic pump motor is disclosed. The speed of rotation of both motors is controlled by a pulse width modulated...
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5973463 |
Driving controller for electric vehicle
A driving controller of electric vehicles. An angular accelerative dimension error calculator calculates error information having a dimension of angular acceleration of a car body. A feedback...
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5877605 |
Servo device having plural servo systems
A servo device which simultaneously controls plural servo systems, using a digital signal processor (DSP). The servo device includes plural servo systems, plural control subjects, and plural...
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5796220 |
Synchronous drive system for automated textile drafting system
An automated drafting system particularly suitable for drafting textile strands of sliver is provided. The automated drafting system includes a synchronous drive sliver drafting roller system...
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5760564 |
Dual guide beam stage mechanism with yaw control
A dual guide beam stage mechanism for accurate X-Y positioning for use e.g. in semiconductor processing equipment provides accurate planar motion and yaw control. Over-constraint between components...
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5712543 |
Magnetic switching element for controlling a surgical device
An apparatus for controlling a surgical device includes a housing and a magnetic switching element mounted on the housing. The magnetic switching element includes a magnet, a magnetic sensor...
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5705908 |
Drive unit and a motor drive control method
A drive unit capable of maintaining the stability of driving speed with respect to the driven part in which the motor is not used at a low drive efficiency. Said drive unit comprises the first and...
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5638387 |
Electrically driven lift truck
A lift truck has a tractive-power electric motor, an electric motor which actuates a pump for the hydraulic circuits, and batteries which supply the electric motors. In order to obtain a long...
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5606231 |
Vibrating table for masses to be compacted and a vibratory method of compaction for the compaction of concrete
A vibrating table for compaction of a mass such as concrete. The vibrating table includes a table top adapted to support the mass to be compacted. Support members support the table top above a...
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5528114 |
Apparatus for driving two motors
Plural systems of switching signals are obtained from a single microprocessor for driving a plurality of motors and other apparatuses while achieving effective use of ports of the microprocessor....
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5487437 |
Coupled differential turning control system for electric vehicle traction motors
A turning control system for an electric vehicle includes a differential filter which receives a signal indicative of a desired vehicle steer angle and generates a pair of signals representative of...
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5345154 |
Electric continuously variable transmission and controls for operation of a heat engine in a closed-loop power-control mode
A heat engine operates an alternator that supplies electrical power to an electric continuously variable transmission for driving at least one ac motor through a differential to multiple wheels or...
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5248922 |
Multi-DSP, multi-functional motion controller
A motion controller, which is adaptable to a variety of different motors, provides motor control signals to the motors of a multi-axis coordinated system as a function of position and velocity...
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5239245 |
Method of controlling rotational speeds and phases of a drum motor and a capstan motor in a VCR
A method of controlling the rotational speeds and phases of drum and capstan motors forming part of a servo system in a VCR by detecting signals that correspond to current rotational speeds and...
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5239247 |
Reconfigurable master-slave control
A machine control permits the selection of input values defining configurations of motors on the machine in desired master-slave relationships. Individual master-slave dependencies may be...
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5237250 |
Multiplexed stepper motor control apparatus
A multiplexor circuit connects a plurality of stepper motors to a lesser number of stepper motor drivers with at least one driver connected to a plurality of parallel connected stepper motors. A...
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5191267 |
System for indicating extent of overdrive in frictional drive arrangements
A spiral drum freezer apparatus having a system for measuring and monitoring the "overdrive" of a rotated drum relative to a spiral belt helically wrapped around the drum in an ascending fashion....
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5117163 |
Drive system for railway vehicle
A drive system with slip control for railway vehicles with two or more dc drive motors and with common control of the motor armature currents and a logic unit to which are input a measured signal...
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5077506 |
Microprocessor controlled arthroscopic surgical system
An apparatus for controlling the speed of a plurality of DC motors, comprises a device for supplying voltage to one of the plurality of DC motors, first selector for selecting one of the DC motors...
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5063334 |
Orthogonal two-axis moving apparatus
An orthogonal two-axis moving apparatus includes a first guide member which extends along one direction and is attached to a stationary position, a slide block which is slidably supported on the...
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5013981 |
Control mechanism for a drive motor or the like
Control arrangement for an electric motor having a control arrangement which, in accordance with at least one nominal value fed thereto, controls at least one power control element to be connected...
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4956589 |
Integrated tool control for work station
A work station having a plurality of tools permits selection, operation and speed control of individually selected tools using a common speed control for each tool. Each of the tools includes a...
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4922173 |
Machine drive system
A drive system for a machine such as a robot providing motion in two independent directions under the control of respective motors, comprising a saddle supported for motion in a first said...
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4866354 |
Spiral freezer drive system
In spiral drum freezer apparatus having an insulated disclosure a spiral drum is mounted for rotation within the enclosure and includes a spiral belt to the spiral drum with the top of the spiral...
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4829217 |
Device for controlling movement of a rotating element
A safety device for use in a recording apparatus controls the on/off operation and prevents the malfunction of motors for driving a gear flange to rotate a light sensitive drum and for driving an...
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RE32414 |
Robot and control system
A compact robot of the 3-axis type comprising a base-mounted motor control system with means to sense the position of a robot arm through a servo-system comprising position-sensing potentiometers...
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4661714 |
Electric marine propulsion system
An AC marine propulsion system which provides a constant continuous rated horsepower availability at the standard rated engine RPM, over the full useful operating range of the propeller. A prime...
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4647824 |
Output voltage control for a DC servo amplifier
In a system having a plurality of electric motors which are rated at different voltages, a voltage control circuit enables the electric motors to be connected to a common power supply. The voltage...
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4562388 |
Windup-control system for textile machinery
In a ring spinning or other textile machine with a multiplicity of thread-winding stations each including one or more variable-speed motors, a central controller supplies periodic or continuous...
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4506197 |
Method of controlling mill motors speeds in a cold tandem mill
This invention concerns a method of controlling mill-motor speed in a cold tandem mill. During unsteady phases of rolling operation such as threading, rolling speed acceleration and/or...
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4471273 |
Dual-motor control apparatus
The invention pertains to a control circuit (10) for controlling the speed of a pair of motors (12,14), including a pair of switching elements (68,74) coupling power to the motors (12,14), a pair...
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4415049 |
Electrically powered vehicle control
An electric control is disclosed for an electrically powered vehicle having independently controlled left and right drive motors and associated drive wheels to propel and steer the vehicle. The...
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4341982 |
Simultaneous independent control system for electric motors
A system for simultaneously and independently controlling a plurality of electric motors from a number of dispersed stations. The system operates by transmission of duty cycle modulated selected...
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