Abstract:
The present invention relates to a power electrical switching circuit and more particularly to parallel-coupled switching devices and an associated switched-mode power converter (1). The present invention more particularly relates to a switched-mode power converter (1) comprising a first switching device (9) connected electrically in parallel to a second switching device (9), the first and second switching devices (9 and 10) being driven by a gate driving circuit (8).
Abstract:
The present invention relates to a printed circuit board having a substrate and a condensation sensing circuit (8) comprising an interdigital capacitor with an electrode pattern with at least a pair of electrodes of a condensation sensing element (9) in the form of microstrip lines on said substrate. Said condensation sensing circuit (8) comprises a microcontroller (1 ) that generates a square wave which is fed into a phase shifting stage (3) having said condensation sensing element (9).
Abstract:
The present invention relates to a single phase permanent magnet electric motor (1) that is utilized in the actuation of the circulation or the discharge pumps that operate efficiently when rotating in a certain direction, for example in dishwashers or washing machines, that is controlled whether or not the rotor (3) is in the parking angle (θ1) determined while immobile, if it is not in the determined parking angle (θ ≠ θ1) then the rotor (3) is aligned to resume the determined parking angle (θ = θ1) and the rotor (3) is started up in the desired direction and if the rotor (3) is still rotating in the undesired direction, it is stopped to provide the rotation in the desired direction.
Abstract:
The present invention relates to an electrical household appliance with a power module with a dynamically controlled continuous and discontinuous space vector pulse width modulation (CSVPWM, DSVPWM) scheme. The present invention more particularly relates to an electrical household appliance comprising an electric motor, a driver circuit capable of driving said electric motor, said driver circuit comprising a converter that converts AC mains voltage to DC voltage, a driver circuit inverter stage that inverts the direct current, said driver circuit inverter stage comprising an inverter power module (1 ) having high side and low side power switches (6, 7) with freewheeling diodes (5) in the form of a six-switch three-phase inverter connected to a DC bus, said electric motor being a brushless DC motor.
Abstract:
The present invention relates to an electrical household appliance with a power module with dynamically controlled switching frequency. The present invention more particularly relates to an electrical household appliance comprising an electric motor, a driver circuit capable of driving said electric motor, said driver circuit comprising a converter that converts AC mains voltage to DC voltage, a driver circuit inverter stage that inverts the direct current, said driver circuit inverter stage comprising an inverter power module (1 ) having high side and low side power switches (6, 7) with freewheeling diodes (5) in the form of a six-switch three-phase inverter connected to a DC bus, said electric motor being a brushless DC motor and motor position being determined in the manner that currents flowing through motor phases (2, 3, 4) are recreated.
Abstract:
The present invention relates to an electric motor (1), suitable for operating the circulation or discharge pumps of household appliances like the dishwasher or washing machine, comprising a printed circuit board (PCB) (2), a stator (4) connected electrically to the printed circuit board (2), having one or more than one phase winding (3), a rotor (5), one or more than one winding end (6) extending outwards from the stator (4), providing electrical connections to be made to the phase windings (3), one or more than one terminal (8) each having a pin (7) extending to the printed circuit board (2) whereto the winding ends (6) are attached, one or more than one terminal housing (9) disposed on the stator (4), wherein the terminals (8) are placed such that the pins (7) extend outwards and whereat the terminals (8) are attached by the winding ends (6) and more than one socket (10) arranged on the printed circuit board (2), completing the electrical connection between the printed circuit board (2) and the stator (4) by the ends of the pins (7) being inserted therein.
Abstract:
The present invention relates to a motor control card (1) used for controlling the brushless direct current (BLDC) motors, having a three-phase inverter (3) which transforms direct current received from the AC-DC converter (2) to three phase current by means of the transistors, a sensing unit (4) that detects the rotor position, a microprocessor (5) that provides speed control of the motor (M) by generating pulse width modulation PWM signals having suitable duty cycle by means of the PI algorithm included in its software. The microprocessor (5) applies a PWM signal generated thereby by increasing the duty cycle within the commutation (X) duration wherein the current applied to the motor (M) is transferred from one phase to the other phase in the three phase inverter (3), in order to reduce torque oscillations and therefore motor noise. The brushless direct current (BLDC) motors are used in household appliances like dishwashers or washing machines.