68results about "Single-phase induction motor starters" patented technology

The invention relates to the technical field of single-phase asynchronous motors, and discloses an electronic soft start control method for a single-phase asynchronous motor, which accurately controls the start process of the motor by combining an MCU (Microprogrammed Control Unit) with an electricity metering chip and a silicon controlled rectifier technology. After the system is powered on, the MCU control unit firstly carries out initialization and reads initial circuit parameters collected by the electricity metering chip, and whether starting conditions are met or not is judged based on the parameters. Once the starting condition is confirmed to be met, the MCU sequentially triggers the auxiliary silicon controlled rectifiers to switch on the starting winding and then triggers the main silicon controlled rectifiers to switch on the main winding, so that the motor enters a running state. As the motor reaches a stable operation state, the MCU control unit closes the auxiliary silicon controlled rectifier to reduce unnecessary energy consumption, and adaptively adjusts the conduction time of the starting winding according to the actual load condition, thereby ensuring that the whole starting process is stable and efficient.

An electronic starting switch assembly and control methods for a dryer having a split-phase induction motor. The assembly comprises a microcontroller unit (MCU) configured to execute a control method that dynamically manages the motor's operation by monitoring the forward magnitude current. The MCU determines a stabilized startup forward magnitude current and calculates a crossover condition, allowing for precise control of the motor's transition to single-phase operation by disconnecting the auxiliary winding and connecting the heater element based on real-time forward magnitude current analysis and processing. The system can also monitor for overload conditions indicative of rotor speed drops and can re-engage the auxiliary winding to maintain motor performance. The assembly includes a housing with a heat-sink for efficient thermal management and environmental protection of electronic components. The disclosed method provides a robust solution for efficient dryer operation by ensuring accurate control of motor start-up, running conditions, and overload protection.

A hard start capacitor replacement unit includes a capacitor container having a cover, a plurality of capacitors received within the container, each of said capacitors having a capacitance value, a common terminal mounted on the cover and electrically connected to a common terminal of each of said plurality of capacitors, a plurality of cover terminals mounted on the cover spaced apart from the common terminal and from each other, each cover terminal respectively electrically connected to one of the plurality of capacitors, a relay having contacts and being capable of opening and closing said contacts in response to a monitored condition of the motor, the relay having relay terminals, a fuse electrically connected to one of the relay terminals by a first wire wherein the fuse electrically disconnects the hard start capacitor replacement unit and the motor upon a failure, and a second wire electrically connecting one of the relay terminals and the motor, a third wire electrically connecting the common terminal and one of the relay terminals, a fourth wire electrically connecting one or more cover terminals to one of the relay terminals, wherein the contacts of the relay close to electrically connect one or more capacitors of the plurality of capacitors to the motor, and the contacts of the relay open to electrically disconnect the one or more capacitors of the plurality of capacitors from the motor.

A hard start capacitor replacement unit has a plurality of capacitors in a container sized to fit in existing hard start capacitor space. The capacitors are 4 metallized film capacitors wound in a single cylindrical capacitive element. The container has a common terminal and capacitors value terminals for the plurality of capacitors, which may be connected singly or in combination to provide a selected capacitance. An electronic or other relay connects the selected capacitance in parallel with a motor run capacitor. The hard start capacitor replacement unit is thereby adapted to replace a wide variety of hard start capacitors.

The invention relates to the technical field of single-phase asynchronous motors, and discloses a single-phase asynchronous motor starting control circuit based on an MCU and double silicon controlled rectifiers, which comprises an MCU control unit, a main silicon controlled rectifier, an auxiliary silicon controlled rectifier, an electricity metering chip and a protection circuit. Particularly, in a starting stage, the MCU control unit firstly sends a trigger signal to the auxiliary silicon controlled rectifier to enable the auxiliary silicon controlled rectifier to be in a conducting state, and the auxiliary silicon controlled rectifier is controllably connected with the starting winding to provide extra starting torque for the single-phase asynchronous motor; and after a starting condition is met, the MCU control unit sends a trigger signal to the main silicon controlled rectifier to enable the main silicon controlled rectifier to be in a conducting state, and the main silicon controlled rectifier is connected with the live wire to enable the single-phase asynchronous motor to enter a normal operation state. Thus, the starting winding is only electrified when necessary, energy loss caused by continuous heating of the PTC is avoided, and the overall energy efficiency of the system is improved.

A hard start capacitor replacement unit includes a capacitor container having a cover, a plurality of capacitors received within the container, each of said capacitors having a capacitance value, a common terminal mounted on the cover and electrically connected to a common terminal of each of said plurality of capacitors, a plurality of cover terminals mounted on the cover spaced apart from the common terminal and from each other, each cover terminal respectively electrically connected to one of the plurality of capacitors, a relay having contacts and being capable of opening and closing said contacts in response to a monitored condition of the motor, the relay having relay terminals, a fuse electrically connected to one of the relay terminals by a first wire wherein the fuse electrically disconnects the hard start capacitor replacement unit and the motor upon a failure, and a second wire electrically connecting one of the relay terminals and the motor, a third wire electrically connecting the common terminal and one of the relay terminals, a fourth wire electrically connecting one or more cover terminals to one of the relay terminals, wherein the contacts of the relay close to electrically connect one or more capacitors of the plurality of capacitors to the motor, and the contacts of the relay open to electrically disconnect the one or more capacitors of the plurality of capacitors from the motor.

A hard start capacitor replacement unit has a plurality of capacitors in a container sized to fit in existing hard start capacitor space. The capacitors are 4 metallized film capacitors wound in a single cylindrical capacitive element. The container has a common terminal and capacitors value terminals for the plurality of capacitors, which may be connected singly or in combination to provide a selected capacitance. An electronic or other relay connects the selected capacitance in parallel with a motor run capacitor. The hard start capacitor replacement unit is thereby adapted to replace a wide variety of hard start capacitors.

The invention discloses an electronic switch assembly and a control method of a split-phase starting single-phase induction motor for a household clothes dryer. The assembly comprises an MCU, the MCU is loaded with a real-time algorithm software control program, and the starting speed state of the motor can be detected by analyzing and processing the change of steady-state positive sequence amplitude current in the starting process. Based on real-time positive sequence amplitude current analysis processing, the MCU calculates and detects an overspeed condition in real time, disconnects an auxiliary winding and connects a heater element so as to accurately control the transition of the motor to single-phase operation until a rated rotating speed is reached. Based on real-time positive sequence amplitude voltage and current analysis and processing, the overload condition of rated rotor speed reduction can be detected, and the auxiliary winding can be switched on again to maintain the operation performance of the motor. The assembly includes a housing having a heat sink for efficient thermal management and overheating protection of electronic devices. And an effective, reliable and low-cost solution is provided for the operation of the efficient clothes dryer by ensuring the accurate control on the starting and operating conditions of the motor and the overload protection.

The invention discloses a filter circuit, a household electrical appliance, a control method and a computer readable storage medium, the filter circuit comprises a first resistor and a first capacitor, two ends of the first resistor are respectively connected with a first live wire end and a second live wire end, the first resistor is connected in series with the first capacitor, and two ends of the first capacitor are respectively connected with the second live wire end and a zero line end. The two ends of the first capacitor form output ends used for being connected with the motor, and the filter circuit is configured to form a charging loop through the first live wire end, the first resistor, the first capacitor and the null line end to charge the first capacitor, and form a power supply loop through the second live wire end, the motor and the null line end to supply power to the motor when the first capacitor meets a preset charging condition. According to the filter circuit, the first resistor connected in series with the first capacitor can reduce the current for charging the first capacitor, when the motor is powered, the current for charging the first capacitor is very small, the first capacitor is not damaged, and the filtering effect is not influenced because the first resistor is not connected.

The invention relates to a starting method and system of an efficient variable-frequency low-temperature compressor. The method comprises the steps that state sensing processing is conducted on working condition parameters of a compressor in the starting stage, and starting disturbance characteristics representing current offset characteristics are obtained; mapping the starting disturbance characteristic into a current adjustment coefficient based on the current offset characteristic, and performing parameter distribution adjustment processing on the feed-forward current compensation model to obtain a feed-forward compensation estimated value; and according to the instantaneous difference value between the current current response collected in real time and the feedforward compensation estimated value, feedback correction is conducted on the current adjusting coefficient to obtain a current compensation instruction, so that the control current is adjusted, and the compressor is driven to complete stable starting under the low-temperature condition according to the adjusted control current. By means of the method, the stability and adaptability of the compressor starting process can be improved in the low-temperature environment.

The utility model relates to a low-power-consumption motor starter, which comprises a current transformer, a bidirectional silicon controlled rectifier, a positive temperature coefficient thermistor, a first connecting terminal, a second connecting terminal and a third connecting terminal, and is characterized in that a main winding of a motor is connected in series to two ends of an alternating current power supply through the first connecting terminal, a primary coil of the current transformer and the third connecting terminal; the second pole of the bidirectional silicon controlled rectifier is connected with the third connecting terminal, the motor secondary winding is connected with the second connecting terminal, the positive temperature coefficient thermistor and the bidirectional silicon controlled rectifier in series to form a switch type motor secondary winding loop, and the secondary coil of the current transformer is connected between the trigger pole of the bidirectional silicon controlled rectifier and the positive temperature coefficient thermistor; when the motor main winding is started, the bidirectional silicon controlled rectifier is conducted to assist the motor in starting, and when the motor enters a normal operation state, the bidirectional silicon controlled rectifier is cut off. When the motor enters a normal operation state, the bidirectional silicon controlled rectifier is cut off, so that the power consumption generated by the low-power-consumption motor starter is very low, and the structural design is more reasonable.

There is provided an induction machine (100) comprising a rotor (120); a stator (140); and a phase-shift oscillator (160). The stator comprises: a first winding (141); and a second winding (142), arranged at a first angle (101) relative to said first winding. The phase-shift oscillator comprises: a transistor (170), the transistor (170) being a high-electron mobility transistor, HEMT; and a phase-shift network (180). The first winding is connected to a first node (181) of the phase-shift network and wherein the second winding is connected to a second node (182) of the phase-shift network, wherein the phase-shift oscillator is configured to provide a first phase electric signal at the first node and a second phase electric signal at the second node, wherein a difference between the first and second phase corresponds to the first angle. There is also provided an electric aircraft propulsion system comprising the induction machine.

A motor control circuit is provided for connecting or disconnecting an AC voltage to an AC motor, having a switch having two switch contacts, configured to respond to a process variable and move between open and closed switch contact positions to connect or disconnect the AC voltage to the AC motor; and a snubber circuit arranged across the switch contacts in parallel with the AC motor, and configured to respond to motor inductance when the switch is moved between the open and closed switch contact positions, and provide arc suppression in the switch by dissipating energy stored in the motor inductance. The snubber circuit may include a network having a resistor connected in series with a capacitor, or a metal oxide varistor, or a transient voltage suppressor.

The invention relates to the technical field of starters, and relates to an electronic starter and a control method thereof, and the electronic starter comprises an electronic switching circuit which is used for controlling the on-off of the current of a secondary winding of a motor; the trigger circuit comprises a rectifier bridge, a first triode, a second triode and an MOS tube; and the bias circuit is connected with the base electrode of the first triode, and the bias circuit is used for transmitting bias current to the base electrode of the first triode. According to the invention, the working current of the electronic starter after the motor is started is limited at a microampere level through the resistor with a relatively large resistance value, so that the energy consumption of the electronic starter during the normal operation period of the motor is obviously reduced.

This application relates to the field of single-phase asynchronous motor technology, and discloses a single-phase asynchronous motor starting control circuit with anomaly detection. The circuit includes an MCU control unit, a main thyristor, a secondary thyristor, an electrical metering chip, and a protection circuit. The main thyristor, the secondary thyristor, the electrical metering chip, and the protection circuit are directly or indirectly electrically connected to the MCU control unit. The MCU control unit executes control logic, which not only precisely controls the on and off timing of the main and secondary thyristors to optimize the motor starting process and reduce starting shock, but also judges abnormal states based on real-time current and voltage data provided by the electrical metering chip and quickly takes protective measures when an anomaly is detected. Furthermore, it records key operating parameters when an abnormal state occurs, providing a basis for subsequent fault analysis, greatly simplifying the fault diagnosis process and reducing maintenance costs.

A single phase induction motor of a scroll compressor includes: a main winding that is center tapped forming: a first winding having a first end and a second end; a second winding having a third end and a fourth end; and a node between the second end of the first winding and the third end of the second winding; a first switch: including a first input to receive single phase power from a source; including a first output connected to the first end of the first winding; and including a second output; a second switch: including a second input connected to the second output of the first switch; including a third output connected to the node between the second end of the first winding and the third end of the second winding; and an auxiliary winding.

Enhanced network power factor corrective designs are presented that can use corrective devices that achieve long-term, operationally stable mechanical work. Embodiments can utilize reverse-winding induction motor designs with engineerable parameters and configurations for the reverse winding (13) in systems and through methods where an inductive motor (1) can present a current that leads voltage and a leading power factor (16) to correct other existing induction motors (8) in an initial network (9) or be optimized for a particular application. Designs also present a power factor correction that can present a variable correction without altering the character or physical capacitive value of an electrical correction component. Individual induction motors that have leading current and a leading power factor (16) can be provided to improve reverse winding induction motors. Progressive start controls (23) can also be used in a manner that limits inrush current to operational levels with passive current establishment control where reverse winding (13) effects can be used and perhaps even delayed to passively limit and even effect a current decrease while rotational acceleration continues after initial start transition.

A thyristor element assembly structure comprises a first radiator (50), a second radiator (70) and a thyristor element (5) sandwiched between the first radiator and the second radiator, wherein the thyristor element (5) is connected with the first radiator (50) and the second radiator (70) that are on both sides of the thyristor element by means of a plurality of insulating fasteners (10), the thyristor element (5) comprises a gate assembly (80) and a chip packaging assembly (60), the chip packaging assembly (60) comprises a first packaging shell (606) and a second packaging shell (601), the first packaging shell and the second packaging shell enclose a packaging cavity, the second packaging shell (601) is provided with a blind hole (608) which is at least partially and fixedly connected to the gate assembly, side walls of the blind hole (608) serve as a portion of cavity walls of the packaging cavity, and the gate assembly (80) is fixedly engaged to the blind hole (608) of the chip packaging assembly.

Improved reverse-winding induction motors are presented that can achieve performance that was not previously possible and that teach new ways to configure and utilize the reverse- winding class of motors. Embodiments can present reverse-winding induction motor (1) designs that have at least one drive stator-coordinated reverse magnetic system (8), at least IE4-total motor- efficiency reverse magnetic stator system (9), at least one rated-full load slip-minimized reverse magnetic stator system (10), at least one exorbitantly-sized, reverse magnetic effect-boosting reverse magnetic stator system (24), and even at least one nearly joule effect breakdown current density reverse magnetic stator system (26). New factors and new relationships to configure reverse stator capacitor(s) are disclosed that can achieve improvements in efficiency, slip, and power factor beyond what was previously understood as the limit of performance for a reverse- winding class of induction motor.

A disposal assembly includes a motor coupled to operate a grinding mechanism of a food waste disposer. A first switch is coupled to selectively inhibit the supply of power from a power source to a main winding of the motor, and a second switch is coupled to selectively inhibit the supply of power from the power source to a start winding of the motor. A control circuit is configured to close the first and second switches during an initial startup time period, detect a voltage of at least one of the windings, and open the second switch in response to detection of the voltage above a start voltage threshold value. The control circuit is also configured to subsequent to opening the second switch, close the second switch in response to detection of the voltage below a low voltage threshold value indicative of an excess load condition of the motor.

A single phase induction motor of a scroll compressor includes: a main winding that is center tapped forming: a first winding having a first end and a second end; a second winding having a third end and a fourth end; and a node between the second end of the first winding and the third end of the second winding; a first switch: including a first input to receive single phase power from a source; including a first output connected to the first end of the first winding; and including a second output; a second switch: including a second input connected to the second output of the first switch; including a third output connected to the node between the second end of the first winding and the third end of the second winding; and an auxiliary winding.

A soft-start system for power tools is described. The soft-start system uses a direction feedback signal from the power tool's direction selection switch. A power tool using this soft-start system is also described. Additionally, a power supply circuit using the soft-start system is described.

An improved reverse-wound induction motor is provided that can achieve performance not previously possible and teach new methods for configuring and utilizing the reverse-wound class of motors. Embodiments can provide a reverse-wound induction motor (1) design having at least one drive stator-tuned reverse-magnetic system (8), at least one IE4 overall motor efficiency reverse-magnetic stator system (9), at least one rated full-load slip-minimized reverse-magnetic stator system (10), at least one reverse-magnetic effect-enhanced reverse-magnetic stator system (24) sized beyond the normal range, and at least one near-Joule effect breakdown current density reverse-magnetic stator system (26). New factors and relationships for configuring the reverse-stator capacitor are disclosed that can achieve improvements in efficiency, slip, and power factor beyond what was previously understood as the performance limits for the reverse-wound class of induction motors.

The present application relates to the technical field of single-phase asynchronous motors, and discloses a single-phase asynchronous motor starting control circuit based on an MCU and dual thyristors, which includes an MCU control unit, a main thyristor, a secondary thyristor, an electricity metering chip, and a protection circuit. In particular, during the startup phase, the MCU control unit first sends a trigger signal to the secondary thyristor to put the secondary thyristor in a conductive state, and the secondary thyristor connects to the starting winding to provide additional starting torque for the single-phase asynchronous motor; after the startup conditions are met, the MCU control unit then sends a trigger signal to the main thyristor to put the main thyristor in a conductive state, and the main thyristor connects to the live wire to put the single-phase asynchronous motor into normal operation. In this way, the starting winding is energized only when necessary, avoiding energy loss caused by continuous heating of the PTC and improving the overall energy efficiency of the system.

The invention provides an integrated single-phase motor control system which comprises a starting signal input end, a steering signal input end, a voltage comparison circuit, a charging and discharging adjusting circuit, a charging capacitor, a starting capacitor control circuit and a motor steering control circuit. The charging and discharging adjusting circuit is used for charging the charging capacitor and inputting the charging voltage of the charging capacitor into the voltage comparison circuit in real time, and the resistance value of the charging and discharging adjusting circuit is set according to the power of the motor and the weight of the load; and the voltage comparison circuit is used for generating a stabilized voltage after receiving the starting signal, comparing the stabilized voltage with the voltage of the charging capacitor, and turning off the starting capacitor control circuit when the voltage of the charging capacitor is greater than the stabilized voltage so as to keep the normal operation of the motor. According to the invention, the charging and discharging time of the starting capacitor can be flexibly adjusted and accurately controlled.

The invention relates to a single-phase split-phase motor starting control circuit and an adaptive capacitor thereof. The circuit comprises a signal acquisition part, a CPU processing part, a power supply part and a driving part, the power supply part is respectively connected with each part and is used for supplying power; the signal acquisition part is connected with the CPU processing part and is used for acquiring current, voltage and phase signals, performing CPU operation based on the acquired signals and generating instruction signals for controlling the driving part; three parallel / series capacitors and corresponding control circuits are adopted, motor operation parameters are collected in real time, a CPU judges the state of the motor according to a preset strategy and controls capacitor switches, all the capacitors are connected in parallel in the starting stage to provide large starting torque, and series-parallel combination is conducted in the stable operation process to reduce the capacitance value and improve the efficiency. And the capacitor is cut off to protect the motor when locked-rotor occurs.

A thyristor element assembly structure comprises a first radiator (50), a second radiator (70) and a thyristor element (5) sandwiched between the first radiator and the second radiator, wherein the thyristor element (5) is connected with the first radiator (50) and the second radiator (70) that are on both sides of the thyristor element by means of a plurality of insulating fasteners (10), the thyristor element (5) comprises a gate assembly (80) and a chip packaging assembly (60), the chip packaging assembly (60) comprises a first packaging shell (606) and a second packaging shell (601), the first packaging shell and the second packaging shell enclose a packaging cavity, the second packaging shell (601) is provided with a blind hole (608) which is at least partially and fixedly connected to the gate assembly, side walls of the blind hole (608) serve as a portion of cavity walls of the packaging cavity, and the gate assembly (80) is fixedly engaged to the blind hole (608) of the chip packaging assembly.

A system for controlling an AC motor is provided. The system comprises an electrical connection path for connecting an electrical input of the AC motor to a first phase of alternating current from an electric power supply. The system also comprises two or more motor controllers, each motor controller is located on the electrical connection path between the electric power supply and the AC motor and is operable to regulate current of the first phase passing through it. Each motor controller is connected in parallel, relative to the other motor controllers, to the electrical connection path. At least one processor is configured to control the motor controllers to repeatedly change which of the motor controllers current of the first phase passes through, such that at any given time current of the first phase only passes through one of the motor controllers. A corresponding method is also provided.

Enhanced network power factor corrective designs are presented that can use corrective devices that achieve long-term, operationally stable mechanical work. Embodiments can utilize reverse-winding induction motor designs with engineerable parameters and configurations for the reverse winding (13) in systems and through methods where an inductive motor (1) can present a current that leads voltage and a leading power factor (16) to correct other existing induction motors (8) in an initial network (9) or be optimized for a particular application. Designs also present a power factor correction that can present a variable correction without altering the character or physical capacitive value of an electrical correction component. Individual induction motors that have leading current and a leading power factor (16) can be provided to improve reverse winding induction motors. Progressive start controls (23) can also be used in a manner that limits inrush current to operational levels with passive current establishment control where reverse winding (13) effects can be used and perhaps even delayed to passively limit and even effect a current decrease while rotational acceleration continues after initial start transition.

A motor drive device includes an inverter circuit to drive a motor, an inverter control device to control the inverter circuit, a gate-driving power supply to supply power to be used for driving the inverter circuit, a circuit pattern configured to connect the inverter circuit and the gate-driving power supply, a control power supply connected to the circuit pattern to supply power to be used for driving the inverter control device, and a thermal switch connected to the circuit pattern to interrupt power supply from the gate-driving power supply to the inverter circuit when a temperature of a winding of the motor exceeds a predetermined temperature.