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.

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 method for configuring a motor drive for driving an induction motor. The method includes the motor comprising a rotor and a magnetic core including a magnetic inductance component: performing a plurality of N measurements of a voltage at motor terminals of the motor at standstill during demagnetization of the magnetic core of the motor; determining, based on the N voltage measurements, an estimate of the magnetic inductance component of the motor operating in a linear regime; determining, based on one of the N voltage measurements, an estimate of a time constant of the rotor of the motor operating in a linear regime; and determining an estimate of a rotor resistance of the motor based on the estimate of the magnetic inductance component of the motor and the rotor time constant.

A method for configuring a motor drive for driving an induction motor. The method includes the motor comprising a rotor and a magnetic core including a magnetic inductance component: performing a plurality of N measurements of a voltage at motor terminals of the motor at standstill during demagnetization of the magnetic core of the motor; determining, based on the N voltage measurements, an estimate of the magnetic inductance component of the motor operating in a linear regime; determining, based on one of the N voltage measurements, an estimate of a time constant of the rotor of the motor operating in a linear regime; and determining an estimate of a rotor resistance of the motor based on the estimate of the magnetic inductance component of the motor and the rotor time constant.

Briefly, the invention involves a system and method for generating electrical power. The system includes an electromagnet positioned with one pole directed toward a like pole of a permanent magnet. The permanent magnet is preferably mounted for oscillating movement toward the pole of the electromagnet. A control system for the electromagnet is provided to supply direct current (DC) power in the form of square wave pulses which coincide with the position of the permanent magnet. Power is collected upon the collapse of the magnetic field within the electromagnetic magnet. In some embodiments the present device is supplied in the form of a reciprocating engine which provides rotary motion in addition to the electrical power generated.

Present example embodiments relate generally to aground transportation system for interacting with one or more vehicles, the vehicle comprising at least one magnetic element fixedly attached to the vehicle, each magnetic element operable to generate a magnetic field having a first magnitude and a first direction, the system comprising a magnetic coil assembly fixedly positioned near an area traversable by the vehicle and comprising a core and a magnetic wire coil wrapped around the core, the magnetic coil assembly operable to generate a magnetic field having a second magnitude and a second direction; and an energy storage unit operable to release energy to and store energy from the magnetic coil assembly.

A full-bridge circuit module with an over-temperature protection mechanism for driving an inductive load includes a full-bridge circuit and a comparator module. When the over-temperature protection mechanism is triggered, four switching transistors of the full-bridge circuit are turned off, and two body diodes of corresponding twos of the four switching transistors which are electrically connected to each other via the inductive load are conductive to form a load current flowing through the inductive load. When the load current causes a first output voltage of a first output terminal of the full bridge circuit to drop to a first comparison voltage and causes a second output voltage of a second output terminal of the full bridge circuit to reach a second comparison voltage, the comparator module controls the corresponding twos of the four switching transistors which are electrically connected to each other via the inductive load to be turned on.

A full-bridge circuit module with an over-temperature protection mechanism for driving an inductive load includes a full-bridge circuit and a comparator module. When the over-temperature protection mechanism is triggered, four switching transistors of the full-bridge circuit are turned off, and two body diodes of corresponding twos of the four switching transistors which are electrically connected to each other via the inductive load are conductive to form a load current flowing through the inductive load. When the load current causes a first output voltage of a first output terminal of the full bridge circuit to drop to a first comparison voltage and causes a second output voltage of a second output terminal of the full bridge circuit to reach a second comparison voltage, the comparator module controls the corresponding twos of the four switching transistors which are electrically connected to each other via the inductive load to be turned on.

A system for controlling an operation of an induction motor is provided. The induction motor includes circuitry and a memory having instructions stored thereon that, when executed by the circuitry, causes the system to collect time-domain measurements of a stator current of the induction motor operating under varying conditions. The system transforms the time-domain measurements into a spectral domain using a sequence of STFTs based on sliding time windows over the time-domain measurements. The system performs spectral analysis in the spectral domain of the stator current to determine harmonics of different types present in the stator current of the induction motor and stabilize the determined harmonics to a shape of corresponding harmonics of the induction motor when operating under steady-state conditions. The system performs one or a combination of control, fault detection, and/or monitoring of the induction motor based on the stabilized harmonics of the induction motor.

A system for controlling an operation of an induction motor is provided. The induction motor includes circuitry and a memory having instructions stored thereon that, when executed by the circuitry, causes the system to collect time-domain measurements of a stator current of the induction motor operating under varying conditions. The system transforms the time-domain measurements into a spectral domain using a sequence of STFTs based on sliding time windows over the time-domain measurements. The system performs spectral analysis in the spectral domain of the stator current to determine harmonics of different types present in the stator current of the induction motor and stabilize the determined harmonics to a shape of corresponding harmonics of the induction motor when operating under steady-state conditions. The system performs one or a combination of control, fault detection, and/or monitoring of the induction motor based on the stabilized harmonics of the induction motor.