Ebm-papst Mulfingen Gmbh & Co Kg

Ebm Elektrobau Mulfingen Gmbh & Co.

Ebm Werke Gmbh & Co.

Meissner & Wurst Gmbh & Co. Lufttechnische Anlagen Gebäude- Und Verfahrenstechnik

Emb Elektrobau Mulfingen Gmbh & Co.

Helmut Lipp

Martin Bürkert

Wilhelm Reinhardt

Thomas Sauer

Ralph Wystup

Markus Humm

Günter Haas

Dieter Best

Marco Weckert

Martin Buerkert

Bernhard Bamberger

Thomas Heli

Sebastian Schroth

Manfred Renz

Fabian Schneider

Walter Hofmann

Daniel König

Friedrich Schaffert

Klaus Teuke

Andreas Fessel

Erich Fiedler

Hartmut Schneeweiss

Tobias Ehmann

Reinhard Stillger

Gerd Futterlieb

Christian Kranz

Franz Jakob

Karl-Heinz Schultz

Wilhelm Reinhart

Stefan Deubler

Friedrich O Rudele

Rainer Zierlein

Birgit Brausch

Guenther Haas

A dynamically addressable master-slave system and a method for dynamically addressing slave units includes a master unit and a plurality of slave units, such that the slave units are interconnected with the master unit via a bus system. The respective network addresses of the slave units are assigned to the respective serial numbers of these slave units in a table in the master unit according to the position thereof in the system according to a determined order. Upon replacement of slave units, a list of serial numbers of the units to be replaced is transferred to the master unit in the sequence of the acquisition of the serial numbers, which master unit replaces these serial numbers in the table with the serial numbers of the replaced slave units transmitted to the master unit.

Wireless allocation of network addresses

The disclosure relates to an assembly composed of two or more electric drives, each of which is provided with a housing that is preferably closed all around; a transceiver or radio transmitter inside the housing of each electric drive is configured for wireless data communication with a master controller; for this purpose, a properly mounted transmission opening is provided in each housing in order for data to be transmitted and received through the transmission opening.

Wireless transmission

The invention relates to a method and a device for detecting fault currents in a regulated DC intermediate circuit having an active power factor correction.

Device and method for fault current detection

The disclosure relates to a temperature monitoring assembly for monitoring the windings of a motor, comprising at least one temperature sensor or thermal circuit breaker arranged outside of and spaced from the windings of the motor, and at least one heat conducting component, which extends from a first component section for heat coupling and heat transfer, which is in contact with or adjacent to the windings, to a second component section for heat coupling and heat transfer, on or adjacent to the temperature sensor.

Motor temperature monitoring

A master-slave system includes a master unit having a digital output for providing a signal or a serial signal sequence of signals, and at least two slave units. Each of the slave units includes at least one digital serial memory having a size of one bit, and each slave unit includes an input and an output. The slave units are serially connected to one another via the inputs and the outputs via a signal line (). The output of a first slave unit is connected via the signal line to the digital output of the master unit. The master slave system is configured so that a signal supplied by the digital output is detected at the input of the slave unit, in order to raise the address of the corresponding slave unit in each case by the value '1', to store the signal change in the memory and to output a signal corresponding to the content of the memory at the output of the memory.

Dynamically addressable master-slave system and method for dynamically addressing slave units

An electronic circuit comprises at least one semiconductor switch mounted with its switching path in series with an inductive load to be triggered, and at least one freewheeling element that interacts with the semiconductor switch during switching phases and is also mounted in series with the load. A control unit controls a control connection of the semiconductor switch with a variable control current as a function of the time profile of a voltage measured at the freewheeling element and/or as a function of the time profile of the voltage measured at the switching path. A method for triggering a semiconductor switch of such a circuit, triggered by a variable control current for switching, the control current predefined as a function of the time profile of a voltage measured at the freewheeling element and/or as a function of the time profile of the voltage measured at the switching path.

Electronic circuit and method for triggering a semiconductor switch

An electronic control circuit for an electronically commutated motor (ECM) is disclosed. A plurality of power transistors controls the ECM, and a reference transistor is formed together with the power transistors on a common support. A control unit is configured to, in a test mode: apply a test current to the reference transistor and one of the power transistors respectively; measure a saturation voltage of the reference transistor and one of the power transistors; evaluate a saturation voltage difference between the measured saturation voltages of the reference transistor and the respective power transistor; evaluate a rate of change of saturation voltage differences between a first iteration of the test mode and a second iteration of the test mode; and determine an expected remaining service life of the power transistors based on the temperature of the support during the test mode and the rate of change of the saturation voltage differences.

Electronic control circuit comprising power transistors and method for monitoring the service life of the power transistors

A control circuit () for an electronically commutated, direct current motor (M) without a collector with a semiconductor end stage () which is controlled by an electronic commutation control () via a driver stage () for the time-offset control of the stator coils (U,V,W) of the motor (M) for the purpose of producing a magnetic rotating field for a rotor depending on the rotor rotation position. Two redundant stall protection units () monitor the motor (M) during operation for rotation of the rotor, whereby in the case of a determined stall situation, the first stall protection unit () deactivates the driver stage () and the second stall protection unit () shuts off the supply voltage (U) for the driver stage ().

Driving circuit for an EC-motor

The present invention relates to a method and a system for controlling a permanent magnet excited, brushless, electronically commutated, three-phase electric motor () wherein a single-phase main AC voltage (U) having a mains frequency (f) is rectified and supplied to an inverter () via a slender intermediate circuit () containing no, or minimum, intermediate circuit reactance as intermediate circuit voltage (U) pulsating at double the mains frequency (2f) which is actuated for powering and commutating the electric motor (). Control takes place by means of a field-oriented current-space vector regulator, wherein a q-current (i) as torque-forming component of the current-space vector (i) is regulated perpendicularly to the permanent magnetic field and a d-current (i) can be regulated as a field-influencing component of the current-space vector (i) in the direction of the permanent magnet field. In this case, dynamic field attenuation occurs, wherein the d-current (i) in the negative range is defined with a sinusoidal profile and at double the main frequency (2f) and wherein the d-current (i) is regulated according to its phase position and its amplitude such that ripple of the q-current (i) is minimized. Since the q-current as torque forming component is proportional to the torque, thus the torque ripple is also minimized, in spite of the strongly pulsating intermediate circuit voltage (U).

Method and control system for controlling a brushless electric motor

The present invention relates to a method and a control system for driving a three-strand brushless, electronically commutated electric motor (), wherein a line AC voltage (U) is rectified and fed via a slim DC link () with minimum DC link reactance as a DC link voltage (U) to an inverter () that can be driven to supply and commutate the electric motor (). A pulsating DC voltage (U) initially generated by rectifying the line AC voltage (U) is dynamically increased with respect to its instantaneous values by a step-up chopper () in such a manner that the resulting DC link voltage (U) with a reduced ripple always lies above a defined limit voltage (U/U) over time. The control system consists of a network rectifier (), a downstream slim DC link () with minimum DC link reactance and a controllable inverter () that can be supplied via the DC link and driven to commutate the electric motor (). A step-up chopper () is integrated therein with a controller () designed in such a manner that, the pulsating DC voltage (U) rectified by the network rectifier () is dynamically increased with respect to its instantaneous values in such a manner that the resulting DC link voltage (U) with a reduced ripple always lies above a defined limit voltage (U/U) over time. Stray inductances (Ls-Ls) of the motor winding heads present in the electric motor () are used as inductor (L) for the step-up chopper ().

Procedures and control system to control a brushless electric motor

The present invention provides a high-pressure blower comprising a fan arrangement which includes a fan, and a fan housing for conveying working air. An electromotor drives the fan via a motor shaft to provide motor self-ventilation by generating a cooling air stream flowing through the motor due to a cooling wheel driven by the rotor. A wall section separates the interior space of the fan housing accommodating the fan airtight from the interior space of the blower accommodating the electromotor so that the cooling air stream flowing through the electromotor is separated and independent of the air flow of the working air conveyed to the fan.

Cooling arrangement for an electromotor

A clean room system has filter-fan units each having at least one fan motor and being connected to an electric network. At least one central control unit is provided. A connecting bus system for connecting the filter-fan units to one another and to the at least one central control unit is provided.

Clean room system

A brushless dc external-rotor motor having a hollow cylindrical heat sink fastened to the peripheral border region of a printed circuit board. Power semiconductors are arranged on an inner cylinder wall of the heat sink in a heat conducting manner, and the cylinder wall forms part of the peripheral border of the stator flange in the motor. A connector fastens Hall generator(s) on the circuit board and provides the electrical connection with the circuit board. The connector can be soldered along with all other electronic components in a joint soldering process, wherein a subassembly of a preassembled circuit board and a heat sink fastened to its periphery and carrying the power semiconductors passes through a solder bath to solder all components in a single soldering process. It is subsequently necessary only to plug the Hall generator or generators onto the connector or connectors soldered onto the circuit board. The connector can include individual contact tubes, which are soldered in the circuit board and into which the connection pins of a respective Hall generator can be plugged.

Brushless electric motor with heat sink and mounting arrangement thereof

The invention pertains to a control circuit for a collectorless DC motor where at least one power transistor (14, 16) is input-connected to each stator coil (2, 4) of the motor; said transistor is driven by at least one rotor position sensor, especially a Hall generator having commutation circuits to commute the motor current, and where a blocking protection device is provided to interrupt the motor current in an overload or blockage. The blocking protection device (26) has at least one semiconductor circuit (30) carrying the motor current which is switched through or blocked depending on its temperature.

Trigger circuit with blocking protection device for a collectorless DC

A protection circuit for stalling protection in commutatorless direct current motors is driven by Hall generators, in particular Hall IC's. A respective semiconductor circuit element (5, 14) disposed in series with each stator winding (1, 2) is turned on or off in dependence on a control voltage induced in the stator windings (1, 2). The control voltage (U.sub.B) is constituted by the sum of the operating voltage in the unenergized windings (1, 2) and the counter-e.m.f. induced in these windings, whereby, if the sum of these voltages is greater than the operating voltage, the semiconductor circuit element (5, 14) connected to the respective energized winding (1, 2) is turned on, and, if the counter-e.m.f. is zero or falls below a predetermined cut-off value, the respective semiconductor circuit element (5, 14) is turned off.

Growing community of inventors

Dörzbach-Hohebach, Germany

Helmut Lipp