Abstract

The present disclosure relates to a galvanic isolation device or a bidirectional connecting line of a LIN bus system with two optocouplers arranged in antiparallel, each having a light-emitting element and a light-receiving element, wherein the galvanic isolation device is connectable to a LIN bus via a first signal connection and to a microprocessor via a second signal connection, wherein each signal connection is connected to the respective light-emitting element of an optocoupler, and wherein a diode is connected in antiparallel to the light-emitting element, such that, when a low signal level is applied to one of the signal connections, the signal level at the other signal connection is also low, without the signal being fed back.

IPC Classes  ?

• H04L 12/40 - Bus networks
• H04B 10/80 - Optical aspects relating to the use of optical transmission for specific applications, not provided for in groups , e.g. optical power feeding or optical transmission through water
• H03F 3/21 - Power amplifiers, e.g. Class B amplifiers, Class C amplifiers with semiconductor devices only

Abstract

The invention relates to an electric oil pump having a switched reluctance motor for a motor vehicle, comprising - a ferromagnetic rotor, - a stator having stator poles, each stator pole having a winding with at least one winding phase, and wherein at least two winding phases (L1,L2) of a stator pole or at least two winding phases (L1,L2), which are arranged on diametrically opposite stator poles, are assigned to a motor phase, wherein the at least two winding phases (L1,L2) are arranged between a first supply line (3) connected to a direct voltage source and a second supply line (4) connected to a ground connection, and wherein each winding phase (L1,L2) is assigned an upper electronic switch (Q1,Q3) and a lower electronic switch (Q2,Q4) with in each case a freewheeling diode (D1,D2,D3,D4) which is arranged in parallel, and - a control device which controls the electronic switches (Q1,Q2,Q3,Q4) of the circuits as a function of the position of the rotor, wherein the at least two winding phases (L1,L2) of a motor phase are interconnected in a common circuit via a shunt arm (5) such that the at least two winding phases (L1,L2) of a motor phase are switchable by means of the control of the electronic switches (Q1,Q2,Q3,Q4) between a parallel circuit and a series circuit.

IPC Classes  ?

• H02P 25/08 - Reluctance motors
• H02P 25/18 - Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details characterised by the circuit arrangement or by the kind of wiring with arrangements for switching the windings, e.g. with mechanical switches or relays

Abstract

The invention relates to a switched reluctance motor comprising a ferromagnetic rotor, a stator having stator poles, each stator pole having a winding with at least one winding phase, and wherein at least two winding phases (L1,L2) of a stator pole or at least two winding phases (L1,L2), which are arranged on diametrically opposite stator poles, are assigned to a motor phase, wherein the at least two winding phases (L1,L2) are arranged between a first supply line (3) connected to a direct voltage source and a second supply line (4) connected to a ground connection, and wherein each winding phase (L1,L2) is assigned an upper electronic switch (Q1,Q3) and a lower electronic switch (Q2,Q4) with in each case a freewheeling diode (D1,D2,D3,D4) which is arranged in parallel, and comprising a control device which controls the electronic switches (Q1,Q2,Q3,Q4) of the circuits as a function of the position of the rotor, wherein the at least two winding phases (L1,L2) of a motor phase are interconnected in a common circuit via a shunt arm (5) such that the at least two winding phases (L1,L2) of a motor phase are switchable by means of the control of the electronic switches (Q1,Q2,Q3,Q4) between a parallel circuit and a series circuit.

IPC Classes  ?

• H02P 25/08 - Reluctance motors
• H02P 25/18 - Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details characterised by the circuit arrangement or by the kind of wiring with arrangements for switching the windings, e.g. with mechanical switches or relays

Abstract

The invention relates to a traction motor having a switched reluctance motor for a motor vehicle, comprising a ferromagnetic rotor, a stator having stator poles, each stator pole having a winding with at least one winding phase, and wherein at least two winding phases (L1,L2) of a stator pole or at least two winding phases (L1,L2), which are arranged on diametrically opposite stator poles, are assigned to a motor phase, wherein the at least two winding phases (L1,L2) are arranged between a first supply line (3) connected to a direct voltage source and a second supply line (4) connected to a ground connection, and wherein each winding phase (L1,L2) is assigned an upper electronic switch (Q1,Q3) and a lower electronic switch (Q2,Q4) with in each case a freewheeling diode (D1,D2,D3,D4) which is arranged in parallel, and comprising a control device which controls the electronic switches (Q1,Q2,Q3,Q4) of the circuits as a function of the position of the rotor, wherein the at least two winding phases (L1,L2) of a motor phase are interconnected in a common circuit via a shunt arm (5) such that the at least two winding phases (L1,L2) of a motor phase are switchable by means of the control of the electronic switches (Q1,Q2,Q3,Q4) between a parallel circuit and a series circuit.

IPC Classes  ?

• H02P 25/08 - Reluctance motors
• H02P 25/18 - Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details characterised by the circuit arrangement or by the kind of wiring with arrangements for switching the windings, e.g. with mechanical switches or relays

Abstract

A BLDC motor and a method for starting and operating the motor. The motor has a rotor with exciter magnets, a stator with at least three stator coils, and a control and evaluation unit. The method carries out an initialization phase with a defined start time, initial starting field angle of the stator magnetic field and angle rising rate. A partial cycle is carried out with a rising phase that increases a current field angle with a change in voltage application to the stator coils. An analysis phase keeps the current field angle constant. The method continuously records a difference in current between two phase currents of a same direction of flow, the evaluation unit analyzes the recorded difference for the presence of a current eye. Immediate commutation takes place when a current eye is detected or where without detection after a pre-definable time interval has elapsed. The analysis phase is terminated after commutation is carried out. The partial cycle is repeatedly carried out until the final field angle has increased to a value of 360° to define a total cycle.

IPC Classes  ?

• H02P 6/20 - Arrangements for starting
• H02P 6/21 - Open loop start

Abstract

The invention relates to a method for the noise-reduced operation of a switched reluctance motor (1) by means of a reluctance motor assembly which comprises: - the switched reluctance motor (1); - a control and evaluation unit (2); - a data memory (3); - a current regulator (4); - a rotor angle sensor (5); and - a torque evaluator (6), the switched reluctance motor comprising a stator (7), a rotor (8) and motor coils (9). The size of the current applied to the motor coils (9) is stored in a value table in the data memory (3) for different rotor angles. An actual torque is detected, and a deviation between a setpoint torque and the determined actual torque is determined. On the basis thereof, the current values are recalculated. The recalculated current values are written into the value table and form the basis of the next run.

IPC Classes  ?

• H02P 25/098 - Arrangements for reducing torque ripple

Abstract

The invention relates to a vibration- and noise-reduced electric-motor device, in particular an electrical domestic appliance and an electrical sliding roof. The invention also relates to a method for the vibration- and noise-reduced operation of an electric-motor device, the electric-motor device comprising an electric-motor assembly (I), a main body (II) and a driven working group (III), the electric-motor assembly (I) comprising an electric motor (1), a control and evaluation unit (2), a data memory (3), a current regulator (4), a rotor angle sensor (5) and a torque evaluator (6), and the electric motor comprising a stator (7), a rotor (8) and motor coils (9). According to the method, a setpoint current stored in a value table in the data memory (3) is applied to the motor coils (9) in accordance with the rotor angle. The torque deviation resulting, at said setpoint current, between the setpoint torque and the actual torque is determined, and an optimized new setpoint current value is calculated by means of interpolation and is written into the value table.

IPC Classes  ?

• H02P 25/098 - Arrangements for reducing torque ripple

Abstract

The invention relates to a method for the optimized operation of a BLDC motor (1) by means of a BLDC motor assembly which comprises: - the BLDC motor (1); - a control and evaluation unit (2); - a data memory (3); - a current regulator (4); - a rotor angle sensor (5); and - a torque detector (6). The BLDC motor comprises a stator (7) and a rotor (8). The rotor (8) comprises excitation magnets, and the stator (7) comprises stator coils (9). A current can be applied to each of the stator coils (9). A current is applied to the stator coils, the size of the current being defined in a value table depending on the rotor angle. The current values in the value table are continually optimized in accordance with a deviation between a setpoint torque and a determined actual torque.

IPC Classes  ?

• H02P 6/10 - Arrangements for controlling torque ripple, e.g. providing reduced torque ripple

Abstract

The invention relates to a method for starting and operating a BLDC motor, wherein the BLDC motor has a rotor (1), a stator (2) and a control and evaluation unit (3), wherein the rotor (1) has exciter magnets, and the stator (2) has at least three stator coils, wherein in each case one phase current can be applied to each of the at least three stator coils, and wherein a rotating stator magnetic field can be generated by means of the stator coils, having the following method steps: a) carrying out an initialisation phase, b) carrying out a partial cycle, including b1) carrying out a rising phase, wherein a current field angle is increased until a final field angle is reached which exceeds a starting field angle of 60, b2) carrying out an analysis phase, wherein the current field angle remains constant on account of the application of voltage to the stator coils remaining constant, wherein continuous detection of a difference in current between two phase currents in the same direction of flow is carried out, c) repeatedly carrying out the partial cycle, wherein the partial cycle is repeated until the final field angle has risen to a value of 360°, wherein the partial cycles together form a total cycle, d) repeatedly carrying out the total cycle. The invention also relates to a BLDC motor with which the method can be carried out.

IPC Classes  ?

• H02P 6/15 - Controlling commutation time
• H02P 1/04 - Means for controlling progress of starting sequence in dependence upon time or upon current, speed, or other motor parameter