7 results about "Startup winding" patented technology

The invention relates to the technical field of new energy grid connection, in particular to a new energy grid-connected inverter system based on a double-stator synchronous motor interface, which comprises a three-phase inverter and a double-stator synchronous motor, the double-stator synchronous motor comprises a first stator, a rotor and a second stator. Planar air gaps exist between the rotor and the first stator and between the rotor and the second stator. The rotor comprises a first rotor and a second rotor which are rigidly connected, the first rotor is axially adjacent to the first stator, the second rotor is axially adjacent to the second stator, and a magnetic isolation ring is arranged between the first rotor and the second rotor; each of the first stator and the second stator comprises a stator core and an armature winding, the first rotor comprises a first rotor core, an excitation winding and a starting winding, and the second rotor comprises a second rotor core and a permanent magnet. According to the invention, the double-stator configuration can realize voltage transformation and frequency conversion functions, and can solve the problems of reduced power grid inertia, insufficient short-circuit capacity, aggravated broadband oscillation risk and the like caused by grid connection of large-scale new energy through power electronic equipment.

The invention discloses a clothes dryer motor reverse and forward rotation control method and a clothes dryer, and relates to the technical field of clothes dryers, the clothes dryer motor reverse and forward rotation control method comprises a main winding, an auxiliary winding, a controller, a first relay, a second relay and a centrifugal switch, the main winding and a power source are connected in series, and the first relay, the auxiliary winding, the first relay, the centrifugal switch and the power source are electrically connected. And the controller is used for controlling the on-off of the first relay and the second relay so as to realize the exchange between the head end and the tail end of the secondary winding. Only the auxiliary winding column is always used as the starting winding, strict requirements for consistency of parameters of the main winding and the auxiliary winding in the prior art are not needed, the specification of the main winding can be flexibly matched, the quality control difficulty in the production process is reduced, and the production efficiency and the yield of the motor are improved.

This application relates to the field of startup control technology, and discloses a startup timing control optimization method for a startup control circuit. Upon receiving a signal, the MCU control unit initializes a timer and simultaneously triggers the main and secondary thyristors to conduct at time T1. Real-time current data is sampled at a high frequency of 4kHz using an electrical metering chip to obtain a current waveform data sequence. Then, based on this data, the optimal engagement time of the startup winding is predicted. Simultaneously, the MCU control unit continuously records the engagement time of the startup winding and monitors the real-time current through the electrical metering chip. Finally, based on the real-time current, the engagement time of the startup winding, and the optimal engagement time, the MCU control unit adaptively cuts off the secondary thyristor, ensuring that the startup winding is accurately disconnected at a more appropriate time, thereby achieving the goals of reducing energy consumption and improving startup efficiency and stability.

The utility model is suitable for the technical field of motor starters, and provides a shield pump single-phase motor silicon controlled rectifier starter module, which comprises a thyristor starter electrically connected with a shield pump single-phase motor. A starting winding and an operation winding which are connected in parallel are arranged in the shielding pump single-phase motor. The starting winding is connected in series with a power output resistor; the thyristor starter comprises a silicon controlled rectifier, a bimetallic electrostriction blade delay switch and a heating resistance wire; compared with traditional resistor split-phase starting, capacitor starting, centrifugal switch starting and the like, the device has the advantages that the size is smaller, the stability is higher, the starting torque is larger, the device is not limited by temperature, and the starting speed is higher. A single-phase motor of the submerged shield pump is broken through, and the submerged shield pump can be efficiently started and operated without using a capacitor, a centrifugal switch or a PTC (Positive Temperature Coefficient) starter and other devices traditionally.

The application relates to the field of new energy grid connection technology, in particular to a new energy grid connection inverter system based on a double-stator synchronous motor interface, which comprises a three-phase inverter and a double-stator synchronous motor; the double-stator synchronous motor comprises a first stator, a rotor and a second stator, and there are plane air gaps between the rotor and the first stator and the second stator; the rotor comprises a first rotor and a second rotor which are rigidly connected, the first rotor is axially adjacent to the first stator, the second rotor is axially adjacent to the second stator, and a magnetic isolation ring is arranged between the first rotor and the second rotor; the first stator and the second stator each comprise a stator core and an armature winding, the first rotor comprises a first rotor core, an excitation winding and a starting winding, and the second rotor comprises a second rotor core and a permanent magnet. In the application, the double-stator configuration can realize the functions of voltage transformation and frequency conversion, and can solve the problems of reduced power grid inertia, insufficient short-circuit capacity and intensified wide-frequency oscillation risk caused by large-scale new energy grid connection through power electronic equipment.

The application relates to a contactor and an electrical device. The contactor comprises a rectification module, which is used for full-wave rectification of an input of the contactor during starting and half-wave rectification of the input of the contactor during maintaining; an electromagnetic module, which comprises at least two coils, the at least two coils serving as starting windings during starting of the contactor, a part of the at least two coils serving as first maintaining windings during maintaining of the contactor, another part of the at least two coils generating a reactance as a voltage reduction component together with a pulsating direct current obtained through the half-wave rectification and also serving as second maintaining windings; and a conversion module connected with the rectification module, the conversion module being used for outputting starting current of full-wave rectification of the rectification module to the electromagnetic module during starting and outputting maintaining current of half-wave rectification of the rectification module to the electromagnetic module during maintaining. The contactor is used to omit a voltage reduction component, and to eliminate the problem of repeated starting and stopping of the contactor caused by faults of the voltage reduction component.

The invention provides an auxiliary power supply circuit and a control method thereof, and a light storage and charging integrated system. The auxiliary power supply circuit comprises a transformer; the primary side of the transformer comprises a starting winding and a main power winding which are arranged on the same magnetic core; wherein the first end of the starting winding is connected to a first input source, and the second end of the starting winding is connected to a first reference ground end through the first switching device; the first end of the main power winding is connected to a second input source, and the second end of the main power winding is connected to a second reference ground end through a second switching device. The secondary side of the transformer comprises a first output winding and a second output winding, and the first output winding and the second output winding are respectively used for outputting electric energy of the auxiliary power supply circuit. According to the scheme, on the premise that stable power supply of the power supply circuit is met, at least one transformer and related circuit structures thereof are omitted, so that the circuit design is simplified, and the hardware cost and standby loss are reduced.