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Patent Searching and Data


Matches 551 - 600 out of 9,131

Document Document Title
WO/1996/000934A1
In a tandem control method in which one shaft is driven by a main motor and a submotor, the difference in speed between the main motor and submotor is calculated to obtain a corrective torque, and the corrective torque is added to the to...  
WO/1995/012242A1
A power supply system for n asynchronous motors (MA1 ... MAn) including a single inverter (1) having 4n static switches (T1, T'1 ... T2, T'2n) arranged in pairs to form two arms (B1, C1 ... Bn, Cn) connected in parallel to the terminals ...  
WO/1995/009104A1
A bag neck tying device for tying a ribbon (15) dispensed from a spool (41) about a gathered neck. A pulley (24) and proximity switch (86) are mounted to prevent the completion of a tying cycle if a bag neck is not properly gathered and ...  
WO/1995/006973A1
The invention relates to a power supply arrangement for a multiple electric motor line drive, the arrangement comprising means connected to an AC supply (1) for supplying a DC voltage to a DC intermediate circuit (2) to which electric mo...  
WO/1994/029596A1
In a positive displacement machine for compressible media with at least two rotors (14a-c) designed as profiled bodies whose profiles come into mesh when the rotors are rotated, the individual rotors are each driven by their own electric...  
WO/1994/023484A1
A rotary actuator derives its power from a synchronous motor preferably of the AC type providing constant output speed, and from a non-synchronous motor, preferably of the DC type, in a helper capacity to provide additional torque for a ...  
WO/1994/022201A1
The invention provides an electric power control system comprising at least one power switching device for switching power to an electric power consuming device; one or more unitary control modules (401) for controlling the power switchi...  
WO/1994/021030A1
In a numerically controlled machine there is provision for contrallably feeding the kinetic energy of a work spindle drive into the intermediate circuit in the event of a power failure and effecting a program-controlled emergency withdra...  
WO/1994/019865A1
A control system for one or more dc motors in which thyristor power modules selectively gate portions of half cycles of ac voltage to the motor field and armature windings, has digitally implemented parallel inner control loops for the a...  
WO/1994/014649A1
The invention relates to a propeller drive system for a vessel or the like for operating two contra-rotating propellers (1, 2) disposed on two coaxial shafts (3, 4) in succession. The power supplies of two electric motors (5, 6) rotating...  
WO/1994/012715A1
Two needling assemblies (8, 9) comprise each a needle board (12) and an alternating motion mechanism (14). A motor (18, 19) is provided for each needling assembly (8, 9). The needling assemblies (8, 9) are mechanically independent of eac...  
WO/1993/020613A1
For a frequency-converter assembly with several current-inverter motor units, the invention proposes that a signal line (20) for the transmission of signals for the control of the buffer-circuit d.c. voltage is associated with the contro...  
WO1993012999A3  
WO/1993/012999A2
An accumulating conveyor includes a plurality of load carrying rollers over which loads are conveyed from an upstream end of the conveyor to a downstream end. The rollers are divided into a plurality of zones. Each zone includes at least...  
WO/1993/012860A1
A drive system (184) that coordinates the rotation of a first and second rotating element, the first element (50) carrying the second element (52). The drive system also having a first motor (66) and a second motor (72), both motors havi...  
WO/1993/007023A1
A vehicle traction system has a tractor vehicle (1) linked to a trailer. The tractor vehicle has driving wheels (3, 4) driven by electric motors (7, 8) and mounted on at least one axle. The trailer (2) has driving wheels (5) driven by el...  
WO/1993/006539A1
A determination of successive differences in phase between engine speed indicative signals from an engine encoder (29, 31) and a master reference signal provides control for fuel flow to the respective engines (25, 27). Counters (20, 22)...  
WO/1993/006598A1
Integrated motor circuits for controlling electronically commutated motors driving head drums are known which include means of obtaining tacho-signals for the motor speed control and means of obtaining control signals for commuting the m...  
WO/1992/012873A1
An apparatus for controlling electric car equipped with at least two induction motors (4a-4d) for driving the electric car. The individual motors are connected with variable-voltage variable-frequency inverters (3a-3d) combined with tach...  
WO/1992/008278A1
A propulsion system for using a pair of electric induction motors (23a, 23b) to power a pair of vehicle drive wheels. The motors are driven by pulses of electric current from a common dc bus (22). The inductance of stator windings cause ...  
WO1992003362A3  
WO/1992/003362A2
In order to control the velocity and spacing of a spaced feed of objects, there is a member (1) rotatable about an axis (2) and having at least one receptacle (7), the objects being fed into the apparatus in spaced succession so that the...  
WO/1992/001562A1
The present invention relates to a technical field pertaining to control of synchronized phases between a plurality of printing rolls in a corrugated board printing machine. An object of the present invention is to realize the control of...  
WO/1991/016758A1
A two motor assembly for driving two fan blades to move air through a heat exchanger for an automotive engine comprising a first two speed DC motor comprising magnets for establishing a fixed magnetic field, an armature rotor rotatable t...  
WO/1991/011688A1
A weighing table (15) on which an object to be weighed is placed is provided with a rod displaceable in accordance with the weight of the object. A solenoid coil (9) is disposed in such a manner as to be capable of imparting an electroma...  
WO/1991/009463A1
A carrier unit (3) which carries articles (W) to be measured is driven by an AC motor (M2). An inverter (20) supplies the AC motor (M2) with a signal having a set frequency to drive the carrier unit (3) at a predetermined speed. A measur...  
WO/1991/008391A1
Described is a stepper motor (1a) in which, in order to operate a throttle valve (2), each pole coil is divided into part-coils (13-16), each of which is controlled by an individual output stage (31). This makes it possible to continue t...  
WO/1990/015474A1
A motor controller using an inverter (103), which is useful for preventing coasting at the time of power failure or for keeping synchronous operation of a plurality of motors (105); and which has a construction wherein a voltage (VDC) on...  
WO/1990/009050A1
A power supply system (10) comprises a multi-phase AC supply (12) which is provided to an AC-DC convertor 14. The DC output from the convertor (14) sources power to a DC bus (16), which then provides power to a secondary supply bus (42) ...  
WO/1990/005407A1
The frequence of the stator current is variable and is changed at a predetermined frequency variation rate. The resultant rms value of the stator current is compared with the power supply current. If it is greater the frequency is kept c...  
WO/1990/001829A1
A method of controlling synchronized operation of a machine tool and an apparatus therefor. In a machine tool having two main spindles (14, 15), a work (18) is gripped by the first spindle and the second spindle controlled by control cir...  
WO/1988/006772A1
A vending machine control apparatus (100) has a product delivery motor home circuit (55) and a DC power supply (10, 110, 210, 310) modulated in response to varying line voltage and/or load by a pulse width modulation circuit (16, 116, 21...  
WO/1987/002526A1
An improved switching control apparatus (1) for switching a number of alternating current (AC) devices (20), such as AC vend motors, uses a reduced number of AC power switching elements (10) such as relays by dividing the AC devices into...  
WO/1986/005044A1
In an apparatus for controlling the speed of electric motors, the servo amplifier of the speed controller is provided with at least any one of a current feedback gain switching circuit (h), a speed feedback gain switching circuit (f), a ...  
WO/1986/003905A1
In a drive control apparatus for servo motors a CPU (11) for servo control, which processes the drive instruction signal and the data fed back from a servo motor (10), is coupled to a main CPU (12) which performs the input data processin...  
WO/1985/005509A1
An electric rotating machine which is adapted to function as a motor or a generator without any major electrical or mechanical modifications. This machine has associated therewith, microprocessor controls (5). There are provided two bala...  
WO/1984/002685A1
An apparatus (10) for controlling current through a motor (12), including a circuit (14) for generating motor speed command data, a circuit (26) for generating a control signal in response to a maximum value of current through the motor ...  
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/1984/002683A1
Apparatus (10) for controlling increases in the speed of a motor (12), including a transducer (24) coupled to an accelerator pedal (18), that generates digital numbers representing motor speed commands, a data processor (32) for receivin...  
WO/1984/002684A1
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 of controllable circuits (64, 74) for driving the switching elemen...  
WO/1984/002040A1
A method of controlling the changeover of a plurality of motors, which changes over successively a plurality of motors (1a, 1b) of different outputs for use, comprises: selecting a change over table (32a, 32b) corresponding to the specif...  
WO/1983/003440A1
The proposed electric circuit to control the driving of a window pane of a motor vehicle is arranged so that the motor (M1 resp. M2) may be started by means of a service switch (S1 resp. S2) also after switching off the ignition (opening...  
WO/1983/003142A1
A circuit arrangement utilises pairs of diodes (D1a, D1b, D2a, D2b) for enabling simultaneous testing by means of a test push button (T) of independent AC circuits (Sa, L1; S2, L2). Upon operation of the test push button (T) power is sup...  
WO/1983/001156A1
The electric machine according to the invention comprises an iron-free rotor provided with two windings (1, 2) each of them being formed by a plurality of coil elements (11, 12, 13 and 21, 22, 23). The elements (11, 12, 13) of the first ...  
WO/1982/004140A1
Synchronous operation device which operates a spindle motor (SPM) and a feed motor (ZMT) synchronously with each other during tapping work. A pulse generator (PG) generating a pulse (Sp) for each predetermined atnount of rotation of the ...  
WO/1982/001350A1
A control unit and a control method for an A.C. electric car in which a D.C. motor is driven by rectifying an A.C. source. When connecting a plurality of motors in parallel, the currents flowing in the armatures of the motors are unbalan...  
WO/1982/001283A1
An arrangement to provide variation of the speed or other operating parameters of an electrical machine without connection to the rotor. The machine is of the induction type having a winding in separate parts to create a flux movable in ...  
WO/1982/000738A1
An electrically operated dual motor drive system having first and second reversible traction motors (14, 16) driven by a power source (18). Motor control circuitry (10, 12) for controlling the direction of current flow through the motors...  
WO/1981/003249A1
Electrically operated dual-motor drive systems for industrial vehicles. In the prior art protection from current overload resulting from high torque low speed operation involved increased circuit complexity resulting from additional prot...  
WO/1981/000795A1
In the control of two or more electrical devices powered by a common battery and each actuated by a separate controlled rectifier chopper circuit, at least one of which is an SCR chopper circuit, under high stress conditions requiring bo...  

Matches 551 - 600 out of 9,131