Patent
AC-DC converter, method of controlling the same, motor driver, compressor driver, air-conditioner, and heat pump type water heater
TLDR
In this article, a rectifier connected with an AC source through a reactor, a plurality of capacitors connected in series between output terminals of the rectifier, first switching means connected between one input terminal of the Rectifier and a connection point of the plurality of the capacitors in inverse-parallel, and a plurality diodes connected with the plurality in inverse parallel are provided.Abstract:
A rectifier connected with an AC source through a reactor, a plurality of capacitors connected in series between output terminals of the rectifier, first switching means connected between one input terminal of the rectifier and a connection point of a plurality of capacitors, second switching means connected between the other input terminal of the rectifier and the connection point of a plurality of capacitors, and a plurality of diodes connected with the plurality of capacitors in inverse-parallel are provided.read more
Citations
More filters
Patent
Inverter control apparatus and control method thereof
TL;DR: In this article, an inverter control apparatus and a control method for a three-phase motor using a capacitor having a small capacitance for a DC link is presented. But the controller is not specified.
Patent
Power converter and air conditioner
TL;DR: In this article, an instantaneous voltage drop or an instantaneous power failure occurs in an AC power source while the power factor corrector is performing a power factor correction operation by boosting an input voltage.
Patent
Switching power supply circuit
TL;DR: In this article, a master transistor and a slave transistor are connected in anti-parallel to the slave transistor, and the master transistor is brought into conduction if a current flowing in a master reactor becomes zero, and is brought to non-conduction after elapse of a first period.
Patent
Electric power converter
TL;DR: In this article, the first and second series circuits of switching devices and a series circuit of capacitors are connected in parallel, where the connection point in the first series circuit is connected through a reactor to an input-output common connection line connected to one end of an AC power supply.
Patent
System and method for detecting phase loss and diagnosing dc link capacitor health in an adjustable speed drive
TL;DR: In this paper, a system and method for detecting input phase loss in an adjustable speed drive (ASD) includes an input unit to detect operating data from the ASD, which includes a DC link current of the ASD.
References
More filters
Patent
Power supply device and air conditioner using the same
Hiroshi Okui,Masanori Ogawa +1 more
TL;DR: In this paper, a power supply device capable of widening a conduction period of an input current by simple control to improve a power factor, and reducing a harmonic distortion of the input current, is presented.
Patent
Converter circuit and motor driving apparatus
TL;DR: In this article, a converter circuit for converting an output voltage from an AC power supply includes a rectifier circuit for rectifying the output voltage of the AC Power Supply; first and second capacitors connected in series, for smoothing the output of the rectifier circuits; and a switch circuit for switching the connections between the respective capacitors and the ACPower Supply so that the output voltages of each of the corresponding capacitors at a cycle that is shorter than the cycle of the power supply.
Patent
Motor control apparatus
TL;DR: In this article, the authors present a motor control apparatus which receives an input voltage to an inverter circuit, a motor current flowing to a brushless motor and a motor command value indicating the value of a current required to flow to the inverter.
Journal ArticleDOI
A new control scheme for single-phase PWM multilevel rectifier with power-factor correction
B.-R. Lin,Hsin-Hung Lu +1 more
TL;DR: A new control scheme for a single-phase bridge rectifier with three-level pulsewidth modulation is proposed to achieve high power factor and low current distortion.
Patent
Motor drive device and drive method
TL;DR: In this paper, a reverse current detection unit detects the direction of the motor current during the synchronous rectifier period based on the polarity of the on voltage of a switching device contained in the motor path, and outputs a reversecurrent detection signal representing the result of this detection to the PWM control unit.