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Method of current reference generation for a motor
A motor control system for determining a reference d-axis current is provided, and includes a motor, a DC power source and DC input lines, and a current command...
Differential speed control apparatus
A differential speed control apparatus is provided having an input shaft in connection with a transmission, a speed reducer, and a planetary gear unit acting in...
Dynamic braking system for an electric power system and method of
operating the same
A dynamic braking system for an electric power system includes a switching device coupled to an electrical conductor. The switching device is configured to open...
Resonant commutation system for exciting a three-phase alternator
An alternator has a field coil that produces a magnetic field which induces electricity in a coil arrangement. A field coil excitation system includes a...
Electric power supply system
An electric power supply system includes: an AC generator having a drooping characteristic; a rectification section for converting AC output of the AC generator...
Load-adaptive smooth startup method for sensorless field-oriented control
of permanent magnet synchronous motors
A field oriented control (FOC) system and method provides smooth field-oriented startup for three-phase sensorless permanent magnet synchronous motors (PMSMs)...
Brushless motor driving circuit and brushless motor driving system
A controlling circuit of the brushless motor driving circuit turns on a switch circuit to provide an electrical conduction between a fixed potential and a...
Discontinuous pulse width modulation
A discontinuous pulse width modulation technique is used in a controller to control an inverter that converts DC battery power to AC power to operate an...
Method for correcting torque for substituting permanent-split
capacitormotor by electronically-commutated motor
A method for correcting torque including: presetting rotational speed of each gear by corresponding gear input lines of a microprocessor; providing a mechanism...
Control device of fan motor
A control device of a fan motor includes: a voltage sensor that detects a voltage applied to a fan motor; a switching portion that selectively connects to each...
Control device for drive device
Multipliers 21a and 21b output values, which are obtained by multiplying a total drive command value E.sub.s by first and second gains G.sub.1 and G.sub.2,...
Vibrational wave driving apparatus
A vibrational wave driving apparatus in the present invention includes an elastic member attached to an electromechanical energy transducing member, a pair of...
MEMS device comprising an under bump metallization
The present invention concerns a MEMS device comprising an under bump metallization (4)--UBM--to contact the device via flip-chip bonding with a substrate. The...
Power conversion device
An inexpensive and space-saving power conversion device is provided which can eliminate a high-cost and large reactor like a buffer reactor. A device includes...
Current source inverter and operation method thereof
A current source inverter includes a controller, an input unit, a buffer unit, a modulating unit, and a commutator. The controller generates a switch control...
Output power adjusting method for inverter
An output power adjusting method is applied on an inverter. The inverter includes a capacitor to store direct current (DC) electricity provided by a...
Single-phase emergency operation of a three-phase inverter and
corresponding inverter having a polyphase to...
A method for converting DC power from a source into AC power by means of an inverter which includes three bridge branches, each having a phase output, is...
Power generation system and package
A power generation system includes an input to receive a low-voltage alternating current and a number N of voltage-conversion modules coupled to the input, each...
AC-DC converter for wide range output voltage and high switching frequency
An electrical circuit includes an input for an AC input voltage coupled to a first inductive element with first and second outputs coupled to respective first...
Inductive power transfer control
An inductive power transfer (IPT) control method is disclosed for controlling the output of an IPT pick-up. The invention involves selectively shunting first...
Apparatus having a vacuum chamber configured to convert electromagnetic
waves to electricity
An electricity generator comprises a core having an interior chamber having a top portion and a bottom portion. The core is held at a vacuum. A frequency...
A power converter is provided for direct conversion of multi-phase AC power to AC power. The power converter includes a conversion circuit and a plurality of...
A power converter is provided for direct conversion of multi-phase AC power to AC power. The power converter includes a conversion circuit, a plurality of input...
Reducing power consumption of a synchronous rectifier controller
The embodiments herein describe a switched mode power converter. In particular, the embodiments herein disclose techniques for reducing power consumption of a...
Power supply device and lighting apparatus using the same
In a power supply device, a primary winding of a transformer is connected in series to a main switching element, and is connected in parallel to a series...
Plural commutated-element direct-current current transformer
The present invention provides a plural commutated-element direct-current current transformer (DCCT) that offers wide bandwidth together with freedom from...
Interleaved forward converter with wide input and output dynamic range
An interleaved forward voltage converter having a first inverter stage has a first transformer having a first secondary winding coupled to a filter inductor. A...
Indirect current sensing method for a constant current flyback converter
An LED driver circuit includes circuitry for indirect sensing of an isolated output current. A rectifier circuit produces DC power to a power factor correction...
Integrated switch mode power supply controller and switch mode power
supply using the same
In one embodiment, an integrated switch mode power supply controller can include: a multiplexing pin that receives a detection voltage signal; a switch mode...
Dimming edge detection for power converter
A controller for a power converter includes an edge detection circuit and a drive circuit. The edge detection circuit includes a comparator, a count module, and...
Power control methods for flyback converters based on the current limit
and switching frequency
Methods for flyback converters are provided. The method, adopted by a flyback converter circuit including a transformer, including: determining an output...
Power converters with adaptive slew rate and methods of operating same
A power converter includes a converter circuit comprising a semiconductor switch configured to couple a power supply node to an output node responsive to an...
Switching power supply device and a semiconductor integrated circuit
In a switching power source which controls a current which flows in an inductor through a switching element which performs a switching operation in response to...
Multi-phase power circuit
According to one embodiment, a power circuit includes an input terminal 1 to which a DC input voltage is applied, an output terminal 2, a first DC/DC converter...
Phase current balancing for multiphase converters
A DC-DC converter includes a first differential voltage sensor to detect a first inductor current by sensing a first differential voltage across a first power...
Multiphase DC-to-DC switching power converter with leading edge and cross
A multiphase DC-to-DC synchronous power converter, which has a number of converter channels that generate a corresponding number of current sense signals,...
Analog input output linearization control
A voltage converter for converting an input voltage to an output voltage is disclosed. The voltage converter includes a voltage converter circuit having a set...
Load aware voltage regulator and dynamic voltage and frequency scaling
A voltage regulator and/or associated circuitry provides an indication of average current consumed or drawn by a load, level and magnitude of transient events,...
Driving device, light-emitting device, projection device, control method,
and storage medium
A driving device includes: a power source circuit that converts inputted power to a constant voltage or constant current power, and outputs this converted...
Semiconductor integrated circuit and power supply circuit
A semiconductor integrated circuit that includes: a capacitive element that has a first end connected to a first node and a second end connected to a second...
Step-up converter having two reciprocally clocked switches
A step-up converter for stepping up an electrical input DC supply voltage to an electrical output DC supply voltage, including a voltage input having a positive...
Power bootstrapping for lowering quiescent current
A circuit includes a switching regulator that produces a first voltage supply output and that includes an operational supply input. The operational supply input...
Power converter and method of operation
A power converter includes a first phase leg including a first di/dt reactor and a first control section, the first di/dt reactor and the first control section...
Switching power supply circuit using switching devices and switching
A switching power supply circuit includes a transformer, a switching unit which includes at least one switch and is connected to an output of the transformer,...
Low power switched mode power supply
A switched mode power supply for supplying power from a power source to one or more output voltage rails, including: a switching unit configured to receive a...
Vehicle AC generator
Provided is a vehicle AC generator that further enhances safety at the time of a vehicle collision, without resorting to changes in material or changes in...
Electromagnetic actuator with enclosure sleeve surrounding armature and at
least one permanent magnet
The invention relates to an electromagnetic actuator having a magnetically soft housing with at least two field coils which are distanced from each other...
A dynamo-electric machine is provided comprising a stator and a rotor assembly which is rotatably mounted relative to the stator and which has a rotor shaft....
Rotating rectifier assembly for electric machine
An electric machine having a rectifier assembly placed within a rotating shaft of the electric machine to convert the AC output of the electric machine to DC...
Electronically commutated motor
An electronically commutated motor, including: a motor body and a motor controller. The motor controller includes a control box and a circuit board disposed in...