Delta Electronics, Inc.

Delta Electronics (shanghai) Co., Ltd

Cyntec Company

Jian-Ping Ying

Hong-Jian Gan

Wei-Qiang Zhang

Jian-Hong Zeng

Ming Hsi Wang

Hong-Yuan Jin

Yi Zhang

Jing-Tao Tan

Yu Wang

Shou-Yu Hong

Wei Feng Yang

Bing Zhang

Li-Feng Qiao

Teng Liu

Bo-Yu Pu

Pei-Qing Hu

Chao Yan

Liang Liu

Zheng Wang

Jie Fu

Wen-Yin Tsai

Yan-Song Lu

Li-Zhi Xu

Guo-Dong Yin

Hao-Yi Ye

Zi-Ying Zhou

Wen-Shi Huang

Zhong Chen

Jian Min Jiang

Bin Liu

Cheng Lu

Ching-Ho Chou

Yi Yang

Tao Jiang

Shih-Ming Huang

Zhao Wang

Hong-Cheng Sheu

Fei Lu

Ming Wang

Sen-Lin Wen

Wei-Liang Fu

Shao-Cai Ma

De-Sheng Guo

Ai-Xing Tong

Jian-Gang Huang

Wan-Bing Jin

Qiu-Hua Zhu

Yuan-Yuan Zhong

Hong-Shan Tao

Zhi-Qiang Jiang

Yang Li

Yu-Ming Chang

Chang-Yong Wang

Hong-Yang Wu

Ziying Zhou

Ke Dai

Yi-Qing Ye

Yan Zhong

Ming-Hui Dai

Na Dong

Yu Zhang

Nan Ye

Yi-Cong Xie

Jin-Ping Zhou

Pian Zhou

Ai-Bin Qiu

Jian-Ping Yang

Li-Jian Wu

Yang-Yang Tao

Xiao-Peng Wang

Qiong Yuan

Jian-Fei Zheng

Fei Lv

Chang-Zan Ma

De-Gang Yi

Jia-Ping Chen

Jing-Fei He

Qui-Hua Zhu

Qing-You Zhang

Zhi-Ying Chen

Jun-Feng Guan

Yong-Hua Cheng

Charles Tsai

Xiao-Ju Hu

Chen-Yang Liu

Zhi-Gan Wu

Shih-Min Huang

She Zhao

Wen-His Huang

Er-Dong Chen

Qing Cong

Yan Chen

Hong-Wei Xiao

Xiao Ge

Hongliu Zhu

Hong-Liu Zhu

Shi-Xiang Zhang

Jia-Le Dai

Qifeng Ye

A method for controlling a DC-DC conversion system having power conversion modules, input sensors, an output sensor and a controller, in which each of the power conversion modules has one or more conversion units. The output sensor detects an output signal of the DC-DC conversion system. The input sensors detect input voltage signals located at series-connected first sides of one or more conversion units respectively. The controller receives the output signal and the input voltage signals. The controller generates a first control signal according to the output signal and an output reference signal. The controller generates second control signals according to the input voltage signals and input reference voltage signals. The controller outputs a modulation signal corresponding to a corresponding one of the second control signals according to the first control signal and the corresponding second control signal, to control switches of a corresponding conversion unit.

DC-DC conversion system and control method of DC-DC conversion system

A driving device includes a driving primary circuit, an isolating transforming circuit, and at least one driving secondary circuit. The isolating transforming circuit is coupled to the driving primary circuit. The at least one driving secondary circuit is coupled to the isolating transforming circuit. The driving primary circuit receives a control signal and a power signal. The driving primary circuit generates a driving pulse signal according to the control signal and generates a power pulse signal according to the power signal. The driving primary circuit transmits the driving pulse signal and the power pulse signal to the at least one driving secondary circuit through the isolating transforming circuit. The at least one driving secondary circuit receives the driving pulse signal so as to generate a driving signal, and the at least one driving secondary circuit drives a power semiconductor switch unit according to the driving signal.

Power conversion device, driving device and driving method

A converter circuit is provided. The converter circuit includes a capacitor module, bridge arms, a voltage measuring module and an open-circuit detection module. Each bridge arm is connected to the capacitor module in parallel and includes an upper arm and a lower bridge arm connected at a middle point. The voltage measuring module measures voltage differences between each two bridge arms. The open-circuit detection module transmits test impulse signals to the bridge arms to activate at least one upper-conducted bridge arm and at least one lower-conducted bridge arm. The open-circuit detection module retrieves the voltage differences of each pair of the upper-conducted and lower-conducted bridge arms to make comparison with a reference value to determine an operation state thereof, and makes comparison of the operation state determined according to the different groups of test impulse signals to determine whether the upper and the lower bridge arms are actually open circuit.

Converter circuit and open-circuit detection method of the same

A method for detecting a short circuit fault in a multi-level inverter circuit is provided. The multi-level inverter circuit includes a plurality of single phase branches each including of switches. The method includes steps outlined below. At least one detecting pulse sequence is transmitted to the switches of each of the single phase branches. Whether a conducting path is formed in any of the single phase branches is determined according to the detecting pulse sequence. When the conducting loop is formed, respective position of one or more malfunctioned switch in the single phase branches is located according to a path of the conducting loop. A short-circuit detection device and a three-phase three-level inverter circuit are also disclosed herein.

Short-circuit detection device and method used in inverter circuit

A short-circuit detecting device includes a coil and a processing circuit. The coil is configured to detect a variation of magnetic flux intensity generated by a current variation of a current flowing through a power semiconductor switch and to generate an induced electromotive force based on the variation of magnetic flux intensity. When the current variation rate of said current is greater than a predetermined value, the processing circuit is configured to generate a short-circuit signal based on the induced electromotive force so as to turn off the power semiconductor switch based on the short-circuit signal.

Power converter, short-circuit detecting device thereof and short-circuit detecting method thereof

A voltage sampling system is provided. The voltage sampling system includes a voltage sampling device, two optic-fiber transmission lines and a control device. The voltage sampling device includes a voltage-dividing resistor module, a common mode rejection circuit and an analog-to-digital converter. The voltage-dividing resistor module generates a first and a second divided voltages according to a voltage source. The common mode rejection circuit receives the first and the second divided voltages to perform a common-mode noise rejecting process to generate an output voltage. The analog-to-digital converter converts the output voltage to generate a digital data signal. The two optic-fiber transmission lines transmit the digital data signal and a clock signal respectively. The control device receives the digital data signal from the analog-to-digital converter and the clock signal to perform a digital data processing.

Voltage sampling system

A power conversion device includes a power semiconductor switch module, a driving signal-transmitting circuit, a plurality of failure-detecting circuits, a protection signal transmitting circuit and a control circuit. The driving signal transmitting circuit receives a control signal and generates a driving signal according to the control signal to drive the power semiconductor switch module. The failure detecting circuits generate a fault signal when they detect that one of the power semiconductor switches and/or the driving signal transmitting circuit is malfunctioning. The isolated pulse transforming unit of the protection signal transmitting circuit receives a corresponding fault pulse signal generated according to the fault signal, and outputs a protection pulse signal. The control circuit generates the control signal and receives a protection signal generated according to the protection pulse signal. The control circuit generates a turn off signal according to the protection signal to turn off the power semiconductor switch module.

Power conversion device and method for transmitting protection signal using the same

An electrical component is disclosed, the electrical component comprising: a magnetic body having a top surface, a bottom surface, wherein at least one first conductive through hole is formed from the top surface to bottom surface of the magnetic body; and a coil disposed in the magnetic body, wherein a first end of the coil is electrically connected to one of the at least one first conductive through hole.

Assembled circuit and electronic component

A three-level rectifier includes at least one phase bridge arm that includes an upper-half and a lower-half bridge arm circuit modules. The upper-half bridge arm circuit module includes a first diode unit and a second diode unit that are in series connection, and a first power semiconductor switch unit. The lower-half bridge arm circuit module includes a third diode unit and a fourth diode unit that are in series connection, and a second power semiconductor switch unit. These first and second power semiconductor switch units are connected to the neutral point of the capacitor unit; the second diode unit and the third diode unit are connected to the alternating-current terminal; the first diode unit and the fourth diode unit are respectively connected to the positive terminal and negative terminal of the direct-current bus. The two circuit modules are disposed side by side and facing each other.

Three-level rectifier

A variable frequency speed control system having a low voltage ride through function that includes a variable frequency drive having a rectifier, a DC bus and an inverter is provided. The variable frequency speed control system includes a voltage drop detecting module, a frequency control module, an operation mode selecting module and an inverter control module. The voltage drop detecting module generates a voltage drop coefficient according to a grid voltage and a rated grid voltage and generates an operation mode switching signal. The operation mode selecting module receives a target frequency signal and a frequency decreasing amount and generates an output frequency signal according to the operation mode switching signal. The inverter control module generates a three phase modulating signal according to the output frequency signal, which is used to control the operation of the inverter.

Variable frequency speed control system and method of the same

The disclosure provides a power converter including a cabinet, a first converter circuit module, a second converter circuit module, and a DC capacitor module. The first converter circuit module includes at least one first bridge arm. The second converter circuit module includes at least one second bridge arm. The first converter circuit module, the second converter circuit module, and the DC capacitor module are disposed in the cabinet. The second bridge arm and the first bridge arm are arranged side by side in parallel. The DC capacitor module is electrically connected between the first bridge arm and the second bridge arm, so that the first bridge arm and the second bridge arm share the DC capacitor module.

Power converter including two converter circuit modules sharing one DC capacitor module

A direct-current capacitor module is disclosed in this disclosure. The direct-current capacitor module includes a plurality of direct-current capacitors and a laminated busbar structure. The direct-current capacitors are grouped into a first portion and a second portion. The laminated busbar structure is electrically connected to capacitor binding posts of the direct-current capacitors. The laminated busbar structure has a positive terminal and a negative terminal. The laminated busbar structure includes a first busbar layer, a second busbar layer and an insulation layer. The first busbar layer includes a first sub-busbar layer, which is electrically connected between at least two direct-current capacitors of the first portion. The second busbar layer includes a second sub-busbar layer, which is electrically connected between at least two direct-current capacitors of the second portion. The insulation layer is disposed between the first busbar layer and the second busbar layer.

Direct-current capacitor module and laminated busbar structure thereof

The present disclosure provides a voltage-adjusting device applied in a power conversion system including a Vienna rectifier, a direct current (DC) bus, and an inverter. The voltage-adjusting device includes a grid voltage sampling module for sampling a grid voltage, a given bus voltage calculation module, a voltage-adjusting module, a current control module and a pulse width modulation module. The given bus voltage calculation module calculates a given value of the DC bus voltage based on the grid voltage. The current control module receives a three phase AC current from the grid, the active current given signal and the reactive current given signal to output a three phase control voltage. The pulse width modulation module outputs a pulse control signal to the Vienna rectifier.

Voltage-adjusting device and method in power conversion system

A converter includes a transformer module, a primary side circuit module, and a secondary side circuit module. The transformer module includes a magnetic core group and a winding. The winding includes a primary winding and a secondary winding, and is further installed on the magnetic core group. The primary side circuit module is coupled to the primary winding. The secondary side circuit module is coupled to the secondary winding. The primary side circuit modules or the secondary side circuit module has overlapping vertical projection area on a first plane with the winding, and the first plane is a plane in a horizontal direction of the winding.

Converter

A five-level rectifier includes at least one phase bridge arm that includes an upper-half and a lower-half bridge arm circuit modules. The upper-half bridge arm circuit module includes a first power semiconductor switch unit, a second power semiconductor switch unit, a first diode unit, a second diode unit, a first connecting busbar, a first insulated wire and a first transfer busbar; the lower-half bridge arm circuit module includes a third power semiconductor switch unit, a fourth power semiconductor switch unit, a third diode unit, a fourth diode unit, a second connecting busbar, a second insulated wire and a second transfer busbar. The two modules are disposed side by side and facing each other.

Five-level rectifier

Growing community of inventors

Shanghai, China

Jian-Ping Ying