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1. 发明授权

US09887616B2 Electric power conversion apparatus with active filter 有权
公开(公告)号：US09887616B2
公开(公告)日：2018-02-06
申请号：US14789412
申请日：2015-07-01
申请人： HELLA CORPORATE CENTER USA, INC.
发明人： Hua Bai , Juncheng Lu
IPC分类号： H02M1/12 , H02M1/42 , H02M1/15 , H02M5/458 , H02M7/48 , H02M3/335 , H02M5/22 , H02M1/00
CPC分类号： H02M1/12 , H02M1/15 , H02M1/42 , H02M1/4258 , H02M3/33507 , H02M5/225 , H02M5/4585 , H02M7/4807 , H02M2001/0058 , H02M2001/007 , Y02B70/12 , Y02B70/1491
摘要： A single-phase AC/DC electric power conversion apparatus includes an indirect matrix converter having an input interface to receive a first alternating current (AC) signal and an output interface to produce a second AC signal, where the first AC signal has a grid frequency. A transformer has a primary winding and an electrically isolated and magnetically coupled secondary winding. A coupling inductor is connected in series between the output interface of the indirect matrix converter and the primary winding. An H-bridge switching arrangement is connected to the secondary winding and produces an output signal having a DC component and at least one AC component. The at least one AC component has a second order harmonic of the grid frequency. An active filter reduces the second order harmonic AC component. A modular conversion apparatus for three-phase power replicates the single-phase apparatus as a module for each phase and omits the active filter.

2. 发明授权

US09484908B1 Gate drive circuit 有权
标题翻译：门驱动电路
公开(公告)号：US09484908B1
公开(公告)日：2016-11-01
申请号：US14744998
申请日：2015-06-19
申请人： HELLA CORPORATE CENTER USA, INC.
发明人： Juncheng Lu , Hua Bai
IPC分类号： H03K3/00 , H03K17/13 , H03K17/687
CPC分类号： H03K17/133 , H03K17/122 , H03K17/164 , H03K17/284 , H03K17/6871
摘要： A driver circuit has a gate drive terminal that produces a gate drive signal to control paralleled power semiconductor switches, such as GaN high electron mobility transistor (HEMT) devices. One of the switches is closest to the gate drive terminal such that its gate drive loop inductance is smaller than the remaining switches that are farther away having a larger loop inductance. An additional resistor or gate-source capacitor is provided in the gate drive circuit of the closest switch which increases the total gate resistance of the closest switch compared to the remaining switches, which delays the turn off time of the closest switch. The delay permits zero voltage switching turn-off of the remaining switches to reduce noise. The closest switch is hard switched off but has the smallest loop inductance, which allows optimized turn off.
摘要翻译：驱动器电路具有栅极驱动端子，其产生栅极驱动信号以控制并联的功率半导体开关，例如GaN高电子迁移率晶体管（HEMT）器件。其中一个开关最靠近栅极驱动端子，使得其栅极驱动环路电感小于离开更大环路电感的剩余开关。在最接近的开关的栅极驱动电路中提供了附加的电阻器或栅极 - 源极电容器，这增加了与其余开关相比最近的开关的总栅极电阻，这延迟了最接近的开关的关断时间。延迟允许剩余开关的零电压开关关断以降低噪声。最接近的开关被硬关闭，但是具有最小的环路电感，这允许优化的关断。

3. 发明公开

US20230223840A1 INTEGRATED ON-BOARD CHARGER AND AUXILIARY POWER MODULE USING A TRIPLE ACTIVE BRIDGE FOR ELECTRIC VEHICLES 审中-公开
公开(公告)号：US20230223840A1
公开(公告)日：2023-07-13
申请号：US17928006
申请日：2021-05-25
申请人： Hella Corporate Center USA, Inc. , University of Tennessee Research Foundation
发明人： Liyan Zhu , Alan W. Brown , Hua Bai , Lukas Michael Keuck
IPC分类号： H02M1/42 , H02M7/00 , H02M7/86 , H02M7/219
CPC分类号： H02M1/4208 , H02M7/003 , H02M7/86 , H02M7/219
摘要： A power conversion system including a triple active bridge (TAB) is provided. The system includes a power factor correction (PFC) module and a three port converter (TPC) module, with no post-regulation or additional stages required. The TPC module includes an OBC full-bridge and an APM full-bridge, each being inductively coupled to the output of the PFC full-bridge, thereby forming the TAB. The OBC full-bridge is adapted to convert an AC input into a high-voltage DC output for a high-voltage battery, and the APM full-bridge is adapted to convert an AC input into a low-voltage DC output for a low-voltage battery. The power conversion system can accept a single-phase AC input and a three-phase AC input, has a lower current stress as compared to prior art TPCs, and freely transfers power from among any ports.

4. 发明申请

US20180152095A1 ELECTRIC POWER CONVERSION APPARATUS 审中-公开
公开(公告)号：US20180152095A1
公开(公告)日：2018-05-31
申请号：US15855183
申请日：2017-12-27
申请人： Hella Corporate Center USA, Inc.
发明人： Hua Bai , Juncheng Lu
IPC分类号： H02M1/12 , H02M3/335 , H02M1/15 , H02M1/42 , H02M5/458 , H02M7/48
CPC分类号： H02M1/12 , H02M1/15 , H02M1/42 , H02M1/4258 , H02M3/33507 , H02M5/225 , H02M5/4585 , H02M7/4807 , H02M2001/0058 , H02M2001/007 , Y02B70/12 , Y02B70/1491
摘要： A single-phase AC/DC electric power conversion apparatus includes an indirect matrix converter having an input interface to receive a first alternating current (AC) signal and an output interface to produce a second AC signal, where the first AC signal has a grid frequency. A transformer has a primary winding and an electrically isolated and magnetically coupled secondary winding. A coupling inductor is connected in series between the output interface of the indirect matrix converter and the primary winding. An H-bridge switching arrangement is connected to the secondary winding and produces an output signal having a DC component and at least one AC component. The at least one AC component has a second order harmonic of the grid frequency. An active filter reduces the second order harmonic AC component. A modular conversion apparatus for three-phase power replicates the single-phase apparatus as a module for each phase and omits the active filter.

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