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Piezoelectric energy harvester device with a stopper structure, system,
and methods of use and making
The present invention relates to an energy harvester device comprising an elongate resonator beam comprising a piezoelectric material, the resonator beam...
Method and device for electrically exciting an actuator for an ultrasonic
A method for electrically exciting a piezoelectric actuator of an ultrasonic motor is described. The ultrasonic motor has at least one acoustic standing wave...
Control apparatus of vibration-type actuator and control method of
Provided is a control apparatus of a vibration-type actuator for generating an elliptical motion of contact portions by a common alternating current including a...
An energy collection system may collect and use the energy generated by an electric field. Collection fibers are suspended from a support wire system supported...
Self-conforming plates for capacitive machines such as electrostatic
motors and generators
Capacitive machines generate torque, generate electric power, and/or transmit electrical signals using closely spaced parallel plates wherein one plate is in...
Pseudo zero vectors for space vector modulation and enhanced space vector
A method of performing space vector modulation for PWM control for creating AC waveforms includes generating and sampling a reference signal to generate...
Power converter in which switching elements are driven in parallel
A power converter for converting DC power to AC power by switching operation of a switching element includes: a bridge circuit configured by at least two series...
Method and apparatus for resonant power conversion
A method and apparatus for providing multi-phase power. In one embodiment, the apparatus comprises a cycloconverter controller for determining a charge ratio...
System for supplying a load with a parallel resonance
A supply system for a load with a parallel resonance and comprising a transformer having a first and a second primary winding and a secondary winding, the...
Multilevel converter circuit for generating a plurality of voltage levels
In some aspects, a direct current power source, formed of a series connection circuit of single power sources, which has three mutually different voltage levels...
Control method for inverter device, and inverter device
An inverter device (1), including a first inverter (10), and a second inverter (20) connected in parallel to the first inverter. Both the first and second...
Method and device for controlling an inverter
The invention relates to a method for controlling an inverter (10) using space-vector pulse width modulation, in particular to control an electric machine, the...
Three-phase power supply system
An electric three-phase power supply system includes a primary stage arranged to receive an input of three-phase alternating current power; a transformer stage...
Converter cell with reduced power losses, high voltage multilevel
converter and associated method
It is presented a converter cell (10a; 10b) arranged to be used in a high voltage multilevel converter. The converter cell comprises: an energy storage element...
Multilevel converter system
A power converter is provided. The power converter includes at least one leg. The at least one leg of the power converter includes a plurality of switching...
Resonance coupler, transmission apparatus, switching system, and
A resonance coupler disclosed includes a first resonator to which a transmission signal is input, a second resonator to which the transmission signal is...
Gate drive apparatus for resonant converters
An apparatus comprises a bridge coupled between a bias voltage and ground, wherein the bridge comprises a first switch and a second switch connected in series...
The invention relates to a flyback converter circuit comprising a transformer, a charging capacitor, a diode, a semiconductor switch and a controller, which...
Multilevel converter and power supply system
A multilevel converter includes at least one converting unit, where the converting unit includes N interleaved parallel bridge arms which enable the converting...
Power conversion system
This disclosure relates to a power conversion system to power a variable impedance load with a variable power source, the power conversion system comprising a...
Flyback-based power conversion apparatus with high conversion efficiency
and low cost mechanism
A power conversion apparatus including a flyback power conversion circuit, a control chip and a detection auxiliary circuit is provided. The flyback power...
Power supply device
There is provided a power supply device having a primary side on which a primary winding of a transformer is located and a secondary side on which a secondary...
System and method for a switched-mode power supply
In accordance with an embodiment, a method of operating a switched-mode power supply includes detecting a voltage decrease in a secondary winding of a...
Converter one pin sensing
Power converters, such as switched-mode power converters comprise a reduced number of sensing pins. A power converter is configured to convert electrical energy...
Controller supply terminal boosting
A power conversion device includes a power switch a first main terminal coupled to a higher potential portion, a second main terminal coupled to a lower...
Switching control circuit and switching power supply device
A voltage detecting circuit of the present invention is formed of a differential amplifier and an H-detection filter circuit, and the differential amplifier...
Frequency jittering control circuit and method for a PFM power supply
A frequency jittering control circuit for a PFM power supply includes a pulse frequency modulator to generate a frequency jittering control signal to switch a...
Galvanically isolated DC/DC converter and method of controlling a
galvanically isolated DC/DC converter
A galvanically isolated DC/DC converter includes at least one first side converter circuit coupled between a pair of first side DC terminals, and at least one...
DC to DC converter assembly
A DC-to-DC converter assembly includes an inverter having first and second terminals connectable to a power transmission network. The inverter has a modular...
Control circuit, battery power supply device and control method
A control circuit can include: (i) a boost mode controller configured to control a switch type converter to operate in a boost mode such that an input current...
Voltage converter for first and second modes of operation
Methods and devices are provided wherein a change of a mode of operation is performed based on a time where both switches of a first and a second switch are open.
Power supply regulator
A power supply that includes positive and negative floating power supply rails. Laterally diffused metal oxide semiconductors (LDMOS) regulate the output...
Circuit arrangement for supplying an output current to a load
A circuit arrangement for supplying an output current to a load which is useable in power supplies and is connectable in parallel to other circuit arrangements,...
Buck-boost circuit with protection feature
In accordance with some embodiments, a buck-boost circuit is contemplated which is bi-directional. That is, the buck-boost circuit be configured to produce a...
A DC-DC converter includes a switching device, a drive circuit for turning on and off the switching device, a bootstrap capacitor electrically connected to the...
Buck converter with reverse current detection and pseudo ripple generation
Provided is a DC/DC converter capable of immediately resuming to a normal operation from a state in which an output transistor is continued to be turned off...
Fast load transient response system for voltage regulators
A circuit and a method for improving the performance of voltage regulators subject to load transients is presented. An auxiliary circuit generates an auxiliary...
Independent output control for single-inductor, bipolar outputs,
Methods and apparatuses drive a Single Inductor Bipolar Output Buck-Boost configured to provide both positive output voltage and a negative output voltage. The...
Single-inductor multiple-output DC to DC converter
A DC to DC converter includes a switching circuit and a controller. The switching circuit includes an inductor coupled to first and second voltage supply nodes...
High-efficiency fractional pump
Methods and systems for generating voltages greater than a supply voltage are described. In some embodiments, a charge pump system may generate a boosted output...
Semiconductor module and boost rectifier circuit
A semiconductor module includes a voltage generator, and a heat dissipating mechanism composed of, for example, an insulating heat dissipating sheet and a heat...
Resonant isolated active power factor correction (PFC) rectifier
A method of driving an isolated converter includes opening a first bi-directional switch on an input side of a transformer, accepting current into a resonant...
System and method for controlling a power supply with a feed forward
In accordance with an embodiment, a power supply controller includes a current controller configured to control an input current of a power supply. The current...
Multi-mode PFC control and control method thereof
A PFC circuit includes: a switching circuit having a power switch; an on time control circuit for controlling an on time period of the power switch; a first off...
Power supply avoiding auxiliary boost circuit over voltage
A power supply avoiding an auxiliary boost circuit over voltage includes a direct current to direct current converting circuit, the auxiliary boost circuit and...
Intermittent power line communication for inverters
Methods, systems, and apparatus, including computer program products for structured content ranking. In an aspect, a method includes, receiving, at a...
Control circuit with synchronization unit for switching converter and
associated control method
A control circuit for a switching converter having a comparison circuit, a synchronization unit, an ON-time control circuit and a logic unit, the comparison...
Shut-off circuitry having temperature stable threshold current sensing
A circuit is described that provides low power and temperature stability in a compact design. In one or more implementations of the present disclosure, the...
Bootstrap driving circuit without extra power supply
The present invention provides a bootstrap driving circuit without extra power supply, which circuit includes a power unit, a switching unit, a bootstrap unit,...
High-resolution positioning device
A high-resolution positioning device has a stator and a rotor, a coil array, arranged on the stator, and having at least three groups of flat coils, wherein...