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WO/2000/041294A1 |
The invention relates to a mains braking device for a line-powered power tool. Said braking device comprises a circuit arrangement with a two-polar switch which switches between the motor mode and the braking mode. The inventive braking ...
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WO/2000/036741A1 |
The invention relates to deceleration in an induction machine (2) comprising a stator which is connected to a single-phase or multi-phase a.c. system (L1, L2, L3) via an a.c. power controller (4) which can be controlled by phase control....
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WO/2000/036731A1 |
The invention relates to a drive unit for units of a motor vehicle such as window lifters,wipers or the like, comprising an electric motor (10), a power switch arranged in the electric power circuit of the electric motor (10) and a contr...
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WO/2000/031413A1 |
Wind turbines are generally provided with an active driving system for orienting them according to the wind direction. This driving system rotates the wind-turbine nacelle so that the rotor blades are oriented in the wind direction. The ...
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WO/2000/014843A1 |
The invention relates to a method for moving a movable vehicle part between at least two positions, wherein the vehicle part is driven by an electric motor (10), a pulse signal corresponding to the rotational movement of the electric mot...
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WO/2000/014863A1 |
A controller for motor driven by means of an inverter device which outputs variable-voltage variable-frequence AC power, wherein, in order to minimize the time required from the input of a deceleration commande to the stoppage of a motor...
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WO/2000/014844A1 |
The invention relates to a method for moving a vehicle part between at least two positions, wherein the vehicle part is driven by an electric motor, pulse signals corresponding to the rotational movement of the electric motor are generat...
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WO/2000/011691A1 |
The invention relates to a switch (4) for electric tools with electrical braking systems, comprising an electric motor with at least one field winding (3) and one armature (2). The switch (4) has switching contacts (S1,S2) that switch be...
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WO/1999/063643A1 |
A power tool (18), including a braking and control circuit (10). The braking and control circuit (10) includes a microcontroller-based control means circuit. The microcontroller assures control of switch means, such as triacs, switches a...
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WO/1999/049563A1 |
An induction machine (20) adapted for variable speed operation, including low and zero speed, comprising: a polyphase stator having two separate stator windings (abc, xyz) with separate input terminals for each winding by which drive pow...
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WO/1999/033163A1 |
A motor controller unit (9) includes an operating program that controllably responds to manual motor start (17) and stop (18) commands for protection of the semiconductor switches (21-23) connected with each phase of a multi-phase electr...
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WO/1999/017172A1 |
An electronically controlled mechanical clock provided with a voltage control oscillator (25) including a generator (20) for generating electricity by a rotor (12) that rotates by using a coil spring (1a) as a power source and a brake ci...
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WO/1999/017171A1 |
A rotation control apparatus that governs the speed of a rotor (103), wherein a phase difference compensation means (118) outputs a phase difference compensation signal (119) acoording to the phase difference between a rotation signal of...
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WO/1999/017414A1 |
The invention relates to a method for detecting and disconnecting a jammed or overloaded permanently excited direct current engine. The operational status of the engine is detected by measuring the voltage (Ug) between the engine termina...
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WO/1999/014835A1 |
The present invention relates to a control system that uses an electric motor which can be controlled through a final stage. A control circuit including a micro-processor is associated to the final stage and provides a pulse-width modula...
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WO/1999/010975A1 |
Electric motors, especially gear motors, are often equipped with electromagnetically actuated mechanical brakes. According to the invention, a unipolar voltage which varies within a time period is generated by a power supply unit (2) in ...
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WO/1999/001926A1 |
A system is known by which a cycle converter-controlled electric motor can be made to run at a generator speed and the electric power generated by said motor can be transformed into heat. Further electric motors are known which are provi...
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WO/1998/056103A1 |
A control apparatus for use with a motor (70) driven by a D.C. power source (72). A controller (100) controls PWM duty cycle of a motor FET drive (66) in response to a detected depression on an accelerator pedal. The power source (72) is...
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WO/1998/029939A1 |
An adjustable speed control for use on a children's ride-on vehicle, where the speed control includes a switch assembly (32) interposed between battery (24) and motors (20, 22) of the vehicle. Switch assembly (32) is selectively operable...
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WO/1998/028539A1 |
The invention relates to a method for enhancing the dosing precision of a dosing pump which is driven by an asynchronous motor via an excentric gear. The supply voltage of the motor is cut off approximately half a cycle time before a des...
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WO/1998/006595A2 |
A braking system for a vehicle powered by DC motor, such as a battery powered locomotive, is arranged to connect a bridging conductor (16) across the motor to brake the vehicle in an emergency. The system engages when the armature voltag...
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WO/1997/043821A1 |
A method and a device for electrical braking of an all-mains motor by which disconnection of supplied feed current to the motor causes an electric switching operation, whereby electric current arranged to cause a reversed rotary directio...
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WO/1997/036367A1 |
The invention relates to ac series motors, in particular universal motors, which have a field magnet (16) with field pole arrangements each comprising two pole parts (8, 13), and the field magnet (16) is designed for a predetermined rota...
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WO/1997/032102A1 |
The invention concerns a variable drive with protection against jamming for movable parts, such as in particular windows and sliding roofs in motor vehicles. According to the invention, the number of revolutions or speed of the drive is ...
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WO/1997/029539A1 |
An electric brake circuit (10) for bringing an alternating current (AC) motor (12) to a rapid halt. When the AC motor is turned on, a braking capacitor (C1) is charged to a preselected voltage. A shunt regulator (18) prevents the braking...
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WO/1997/022175A1 |
The invention relates to a series motor (19) with an electrical brake and comprising an armature (20), provided with an armature winding (25), and comprising at least two field coils (22, 23), arranged on pole shoes (21, 24), and switchg...
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WO/1997/015872A2 |
A process is disclosed for monitoring the path of displacement of a part that can be moved by a drive towards at least one end position. At least one period of time that corresponds to a selectable number of rotations of a driving shaft ...
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WO/1997/011523A1 |
An electrical circuit for a switch having a lockout feature is described. The circuit permits both a primary operator and an auxiliary operator to operate a bi-directional motor (30) by activating separate low-current switches (SW1, SW2,...
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WO/1997/010512A1 |
A sensor capable of confirming the stop of revolution of a motor inclusive of rotation due to inertia. Signal input lines (A, B, C) are connected to three power feed lines (u, v, w) of an A.C. three-phase motor. A high frequency signal c...
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WO/1997/009769A1 |
Brake in an electric motor having a stator (10) and a rotor rotatably mounted in the stator, comprising a brake disc (12) on the rotor and at least one brake shoe which can be engaged with the brake disc (19). The stator is provided with...
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WO/1997/005691A1 |
A dynamic brake device having a simple circuit construction for a servo motor. A PWM control circuit (1) of this dynamic brake device generates a brake signal which simultaneously closes all switching devices of either a first group (TRa...
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WO/1996/034450A1 |
A method and a device for protecting regenerating resistor by which a regenerating resistor is sufficiently protected from thermal damage caused by excessive regeneration by using both a thermostat and an analog simulation circuit in coo...
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WO/1996/028883A1 |
A circuit for driving an electric motor (10) has a triac (24) connected in parallel to the electric motor (10). The triac (24) receives a first control signal (28) that depends from the voltage at a first terminal (11) of the electric mo...
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WO/1996/019857A1 |
The proposal is for a circuit for detecting an overload in an adjusting drive (10, 11, 12) operated by an electric motor (10) with provision for detecting the current flowing through said electric motor (10). A motor current evaluator (2...
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WO/1996/019858A1 |
The proposal is for a circuit and a process for operating an adjustement drive (10, 11, 12) which detect a characteristic (38, 42) of the adjusting drive (10, 11, 12) as a measure of the adjustment force or torque and prepare an overload...
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WO/1996/010223A1 |
A servomotor control system (100) assists in overcoming the problem of servomotor shut down during failure of a programmable control system (110) or of a servo amplifier (170). The servomotor control system (100) includes the programmabl...
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WO/1996/008066A1 |
The proposal is for a circuit for operating an electric motor (11) containing a monitoring device (24) for detecting increased load on the electric motor (11). The monitoring device (24) compares a difference in rotation speed (ND) betwe...
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WO/1996/008065A1 |
The proposal is for circuits for operating an electric motor (11) containing a monitoring device (25) for detecting overloads in the electric motor (11). In a first embodiment, the monitoring device (25) compares the motor voltage (UM) w...
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WO/1996/002443A1 |
A controller (42) for detecting abnormal operating conditions of a continuous motion machine (12) such as a packaging machine. The acceleration and velocity of each motor (14) for the various axes (16) of the machine (12) are examined by...
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WO/1995/024229A2 |
A medical infusion pump (10) including an improved electric motor assembly (256). The medical infusion pump (10) includes a pumping mechanism (250) and a pump chamber (132) in an operative position with respect to the pumping mechanism (...
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WO/1995/020839A1 |
The aim of the invention is to provide a simple method of stopping pump drives smoothly without chattering occurring. This is achieved by using an a.c. controller to increase the operating angle (D) between the motor current and motor vo...
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WO/1995/009478A1 |
In a braking circuit for a universal motor, the field coil or coils are connected in series to the armature during braking by means of a semiconductor switch, preferably a field effect transistor or a thyristor. As the semiconductor swit...
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WO/1995/009477A1 |
Proposed is an electric motor with an electrodynamic brake system in which the same power control stage is utilized both when using the motor and when braking. This enables the exciter current for the separately excited motor to be contr...
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WO/1995/008859A1 |
A drive assembly for a power operated door comprises a DC motor which is drivingly coupled to a torsion spring shaft assembly of the door. The motor is controlled by a control circuit which includes a current sensing device and a microco...
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WO/1995/002276A1 |
A motor braking circuit arrangement, for use with a series/universal motor and a power supply for supplying power to the motor, including two separately actuable switches electrically interconnecting a separate braking winding with the m...
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WO/1995/002268A1 |
In order to control the d.c. motor used to move a window in a motor vehicle, the current drawn by the motor is observed, the direction of movement of the window resulting from the direction of the current and when the window is closed th...
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WO/1995/001003A1 |
An induction motor controller of a power regenerative system which is constituted to quickly decelerate or stop an induction motor even in the event of a power failure. The controller comprises a power failure detection circuit (10) whic...
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WO/1994/027349A1 |
The proposal is for an electric motor drive with overload protection for the electric motor (10) which receives input (18) predetermining a reference position for a moving part. When the overload protection responds, the reference positi...
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WO/1994/027358A1 |
Before turning off a switching element (SW1, SW2, SW3, SW4, SW5, or SW6) at the time of switching the phase (R2, S2, and T2) of a power source to which a regenerated current is fed back, the switching element to be turned on next is turn...
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WO/1994/021027A1 |
The invention relates to an inverse speed motor, especially a universal motor, with a braking device and a stator having a field winding and a rotating armature powered via a commutator and brushes and a suitable circuit for switching th...
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