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Patent Searching and Data


Matches 651 - 700 out of 13,646

Document Document Title
WO/1990/008996A2
In a preferred embodiment, a high-frequency, pulse-width-modulated, power-transistor, DC motor speed controller having current limiting in both drive and regenerative modes, essentially constant ramping rates regardless of whether or not...  
WO/1990/001828A1
There is described a method for retarding a short-circuit induction motor (1) which is driven from a controllabe a.c. inverter (4), the d.c. input of which is connected to a capacitor (6). When retarding the motor (1) the frequency of th...  
WO/1990/000832A1
A switched reluctance motor drive system (10) with phase windings (12) and commutator switches (21-23) is provided with a setting device (15) for operating the commutator switches (21-23). In a first condition the setting device (15) ope...  
WO/1989/012266A1
A device for properly detecting the generation of excessive positional deviation in a servo system for a wide range of rotational speed of a servo motor to correctly and quickly determine the overload condition of the servo motor. A cent...  
WO/1989/008942A1
A conventional three pole D.C. motor has a third brush (9) placed at an acute angle of 60 degrees to one of the normal brushes (6, 7) and positioned to contact the commutator plates (C1, C2, C3). A motor energizing circuit is normally of...  
WO/1989/008946A1
Process for position-stopping of a device (1) provided with a horizontal drum (5) rotated by an asynchronous electric motor (6), characterized in that it comprises means for signalling the position of the drum (5), means for interrupting...  
WO/1989/007165A1
In a known stopping process, the motor is brought to a standstill by repeated braking and then driven again until the main shaft of the sewing machine reaches a certain desired position. In the new process, the duration of the stopping p...  
WO/1989/006394A1
A spindle orientation controller couples a spindle motor (2) via coupling means (5) with a main spindle (4) which produces a signal (LS) indicating its approximate stop position and a signal (MS) indicating its definite stop position. Th...  
WO/1988/009584A1
A control system for an alternating current motor (40), such as an elevator hoisting induction motor, in response to failure of power supply (10), such as service interruption, phase open and so forth, performs in a first emergency contr...  
WO/1988/006817A1
A control system for an electric motor includes a detector associated with a regenerated power absorbing circuit for monitoring operation of the regenerated power absorbing circuit for detecting an abnormal condition thereof. The control...  
WO/1988/005225A1
A motor controller comprising a discharge circuit (7) which decreases the voltage regenerated by a motor (5) to a drive circuit (4) when an AC servo motor or the like is braked, a protection circuit (8) which protects the discharge circu...  
WO/1988/003337A1
To brake commutator motors (2) having an armature (3) and at least one split or continuous field coil (4, 5) independently of an outer energy supply, circuit elements have switching means (8) via which the armature (3) and the field coil...  
WO/1988/002950A1
An improved motor control for banknote handling apparatus (10). An improved stacker pusher motor arrangement (200) has a defined cycle of operation. The time it takes the stacker pusher motor (116) to complete a predetermined portion of ...  
WO/1988/001450A1
An apparatus for controlling an adjustable-speed alternating current motor coupled to drive an elevator cage. The apparatus includes a converter connected to a source of AC power for converting the AC power into DC power, an inverter con...  
WO/1988/000123A1
A method of controlling an injection motor in an injection molding machine having an overheat preventing function to reliably set the injection molding conditions in which the injection motor will not be overheated. When the injection mo...  
WO/1987/007790A1
A regeneration control system for a servo motor (9) of an automatic carrier car which is powered by a storage battery (7) and which effects regeneration control during deceleration. A feedback voltage from a tacho-generator (10) of the s...  
WO/1987/002501A1
A brake pulse generating circuit determines the direction of rotation of a capstan motor at the edges of signals FG1 and FG2 by using D-type flip-flops (21, 22, 23 and (24) and a NOR gate (25). A brake pulse f having a longer pulse width...  
WO/1986/004753A1
Method and device for braking an asynchronous motor by applying a direct current to the field windings. In order to achieve accurate supply time of the braking current the AC voltage appearing at the outer terminals (4, 6) of two mutuall...  
WO/1984/002813A1
Control system (28) for controlling the supply of power to a motor (12) having an armature (34) and a plugging diode (38) connected across the armature (34), including a circuit (14) for producing direction command signals, a circuit (98...  
WO/1984/002812A1
Control system (46) for controlling the supply of power to a motor (12) to produce plugging electrical braking and current limit control, including a circuit (60) for controlling the direction of energization of the motor (12), a circuit...  
WO/1984/000450A1
In an intermittent windshield wiper system in which the time between wiping cycles depends upon the degree of dryness of the windshield and upon the speed of the wiper blades on the downstroke of the wiping cycle toward the dwell positio...  
WO/1983/004349A1
An apparatus for processing the regenerative energy of an AC motor comprises a regeneration-detecting logic circuit (7) outputting a regeneration detection signal when it detects that a semiconductor switch for an AC motor drive is not c...  
WO/1982/002127A1
A digital servo control system for a d.c. motor (20) to achieve stepping motor precision and a wider speed control range than either a conventional d.c. motor or a stepping motor, as may be typically utilized in an IV syring pump. Motor ...  
WO/1982/001840A1
A torch for gas welding in a narrow deep edge preparation under a shielding gas atmosphere comprises a current collecting mouthpiece (1) with an electrode (2) and a nozzle for feeding the shielding gas to the welding zone, that nozzle be...  
WO/1982/001450A1
A direct-current brake control circuit having a construction in which an electromagnetic brake solenoid (35) and a transistor (52) for controlling the current in the solenoid are connected in series with a direct-current source (8), and ...  
WO/1981/001920A1
Simple and economical device allowing the recovery of energy stored by the grid-leak inductances of the electrical machine connected to the thyratron inverter. According to the invention, the device comprises a transformer of which the p...  
WO/1980/002482A1
A propulsion system for an electrically driven traction vehicle includes a chopper (12), a d-c traction motor (11), and means (103, 132, M) effective when the system is operating in a motoring mode for connecting the chopper in series wi...  
WO/1980/001526A1
A digital logic control system for a battery-powered direct current motor having an armature (20) and a separately excited field (21). The operator-demanded speed and the actual motor speed are continuously compared to determine whether ...  
JPWO2019069363A1
The electric motor control device according to the present invention is an electric motor control device that drives and controls electric motors in which a plurality of electric motors are connected in parallel to each other, and is a p...  
JP2020171186A
To provide a discharge device or the like excellent in distributing the burden of a regenerative operation. A drive unit 10 supplies power to a motor 30, receives regenerative power from the motor 30, and is connected to a power supply l...  
JP6768753B2  
JP2020162328A
[Subject] Motor driving which can prevent damage to an element by electromotive force of a motor generated at the time of an irregular stop of a control circuit is provided. [Means for Solution] A control circuit generates a control sign...  
JP2020162193A
[Subject] A control device for electric motors with the axis of rotation able to brake certainly an electric motor which may rotate under influence of external force is provided. [Means for Solution] It is a control device for the axis o...  
JP2020528729A
A method, a device, and computer program products which control an induction motor are indicated. This method answers directions of reducing rotation frequency of a rotor to low clock frequency from initial clock frequency, and exchange ...  
JP2020156272A
[Subject] When drive voltage of a drive which makes an inverter applicable to a drive falls, according to necessity, active short circuit control is appropriately performed with easy composition. [Means for Solution] Rotation electrical ...  
JP2020150730A
[Subject] A passenger conveyor which is stabilized and can perform stop control of a step at the time of a power failure is provided. [Means for Solution] Direct-current power supply system 200 of escalator 1, It has all the wave rectifi...  
JP2020142883A
To provide a passenger conveyor capable of stopping a step gently and at an appropriate distance when a power failure or a failure of an inverter occurs while driving the step. An escalator is an endlessly connected step, a motor that dr...  
JP6753472B2  
JPWO2020044458A1
The ship propulsion electric motor drive device of the embodiment includes a power conversion unit and a control unit. The control unit operates the induction motor by controlling the power conversion unit based on the first reference ph...  
JP2020137184A
[Subject] It enables it to set up speed of a motor from the outside, moving a driven thing to a target position correctly. [Means for Solution] Motor controlling device 1 is provided with the following. Current position primary detecting...  
JP2020137142A
[Subject] Simplification and cost reduction of connection wiring composition are enabled. [Means for Solution] Motor 2C and motor controlling device 13C which carries out electric supply control of the driving power of motor 2C based on ...  
JP2020137338A
[Subject] It aimed at offer of a motor system with possible making a braking effort act to a motor also in a situation where regeneration control is not performed. [Means for Solution] Motor system 10 is provided with stator 24 and rotat...  
JP6746926B2  
JP6745082B2  
JP2020120547A
[Subject] The shift range control device with sufficient accuracy which can stop is provided for a motor. [Means for Solution] Shift range control device 40 changes a shift range by controlling a drive of motor 10 which has motor winding...  
JP2020118270A
[Subject] A shift range control device which can stop is appropriately provided for a motor in a target position. [Means for Solution] A drive control section stops a rotor by fixed phase energization control, when a motor is driven so t...  
JPWO2019026503A1
(EN) Provided is an electric tool capable of performing braking while suppressing deterioration and damage of elements. In the brake control, the calculation unit 21 performs switching control while sequentially switching the combination...  
JP6728424B2  
JP6729002B2  
JP6725762B1
The motor driving device for vessel promotion of an embodiment has an electric-energy-conversion unit and a control part. A control part works the above-mentioned induction motor by controlling the above-mentioned electric-energy-convers...  

Matches 651 - 700 out of 13,646