The present invention discloses a method for generating a low-frequency power carrier control signal. An alternating current power supply voltage/current of a target control device is enabled to experience a specified small jump within n T periods; a jump state in each period is respectively represented by one binary code; different combinations of the jump states in the n T periods and different combinations of formed n binary codes are preset to correspond to different control instructions in a system. After the target control device monitors the voltage/current jump, on the basis of a preset corresponding rule between the n binary codes as well as the jump state codes and the control instructions, control can be implemented according to a corresponding control instruction.

A three-phase regenerative drive configured for operation from a single phase alternating current (AC) power source, the three-phase regenerative drive including a three-phase converter having inputs for connection to a single-phase AC source, the three-phase converter having three phase legs, a three-phase inverter for connection to a motor, the three phase inverter configured to provide three phase command signals to the motor, and a DC bus connected between the three-phase converter and the three-phase inverter. A first phase leg of the three-phase converter and a second phase leg of the three-phase converter are employed to direct current from the single-phase AC source to the DC Bus and a third phase leg of the three phase legs of the three-phase converter returns current to a return of the AC source.

A three-phase regenerative drive configured for operation from a single phase alternating current (AC) power source, the three-phase regenerative drive including a three-phase converter having inputs for connection to a single-phase AC source, the three-phase converter having three phase legs, a three-phase inverter for connection to a motor, the three phase inverter configured to provide three phase command signals to the motor, and a DC bus connected between the three-phase converter and the three-phase inverter. A first phase leg of the three-phase converter and a second phase leg of the three-phase converter are employed to direct current from the single-phase AC source to the DC Bus and a third phase leg of the three phase legs of the three-phase converter returns current to a return of the AC source.

A controller for use in a climate control system includes a power stealing circuit connectible with a control of the climate control system and configured for stealing power via a signal from a power source through the control. An overcurrent limiting circuit is configured to limit a first portion of the signal to prevent a false call for operation of the control. The overcurrent limiting circuit is further configured not to limit a second portion of the signal to prevent a false call, where the control is configured to recognize only the first portion as determinative of whether the signal is a call for operation.

A controller for use in a climate control system includes a power stealing circuit connectible with a control of the climate control system and configured for stealing power via a signal from a power source through the control. An overcurrent limiting circuit is configured to limit a first portion of the signal to prevent a false call for operation of the control. The overcurrent limiting circuit is further configured not to limit a second portion of the signal to prevent a false call, where the control is configured to recognize only the first portion as determinative of whether the signal is a call for operation.

A method for contactless charging of a battery of an electric motor vehicle by magnetic induction using a transmitter coil of a charging device and a receiver coil of the vehicle, the method including: controlling electrical power supply and instructions of an inverter at terminals of which the transmitter coil is connected, according to a variable frequency; measuring, in an analog circuit, at least one analog signal relative to a current or to a voltage at terminals of the transmitter coil; digitally processing at least two incoming digital signals by a control board, a first incoming signal being relative to the voltage and a second incoming signal being relative to the current; transmitting output signals from the control board to the inverter to lock the inverter to a value of a phase difference calculated between the current and the voltage.

A system (1) has a control device (10) with central electronics (11) designed for connection and operation of differently coded electric motors (En), with different motor characteristics (Mn) and/or power classes (Ln), to a device connection (12) of the control device (10). The at least one electric motor (En) is selectable from a number (n) of electric motor (En), that can be connected as intended, has a coding element (Kn). The central electronics (11) have a coding capture device (2) to recognize, via coding element (n), the motor characteristics (Mn) and/or the power class (Ln) of the respective currently connected electric motor (En).

A method of controlling a matrix converter system is provided. The method includes receiving an operating condition and consulting a trained Q-data structure for reward values associated with respective switching states of the switching matrix for an operating state that corresponds to the operating condition. The Q-data structure is trained using Q-learning to map a reward value predicted for respective switching states to respective discrete operating states. The method further includes sorting the reward values predicted for the respective switching states mapped to the operating state that corresponds to the operating condition, selecting a subset of the set of the mappings as a function of a result of sorting the reward values associated with the switching states of the operating state, evaluating each switching state included in the subset, and selecting an optimal switching state for the operating condition based on a result of evaluating the switching states of the subset.

A voltage conversion circuit and a display device are provided. The voltage conversion circuit includes a voltage conversion module, a comparison module, and a control module. The voltage conversion module includes at least two voltage conversion units, and the voltage conversion unit converts the input voltage into a target voltage. The comparison module compares each of testing voltages with a reference voltage to generate a feedback signal. The control module receives the feedback signal and controls the voltage conversion unit to convert the input voltage to the target voltage based on the feedback signal.

A transformer including a piezoelectric plate and interdigital electrodes is provided. The interdigitated electrodes includes a plurality of conductive strips disposed over the piezoelectric plate. A cross-sectional Lamé mode resonance is excited in a cross sectional plane of the piezoelectric plate in response to input voltage applied through the interdigitated electrode, producing a voltage gain. A device including the aforementioned transformer is also provided.