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公开(公告)号：US11271486B2
公开(公告)日：2022-03-08
申请号：US16893728
申请日：2020-06-05
发明人： Hong Zhu , Zhijian Lu , Qing Gao
摘要： A power supply device and a booster circuit for a power supply device. The booster circuit includes an access terminal configured to access a direct current voltage from a battery pack, a transformer group electrically connected to the access terminal so that the accessed direct current voltage is boosted to a predetermined voltage by the transformer group, and a rectifier bridge electrically connected to the transformer group to convert the predetermined voltage into a high-voltage direct current after pulse rectification. The transformer group includes a first transformer including a first primary side and a first secondary side and a second transformer including a second primary side and a second secondary side. The power supply device disclosed is compact in structure and convenient to carry and can output an alternating current.
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公开(公告)号：US20210384748A1
公开(公告)日：2021-12-09
申请号：US17347937
申请日：2021-06-15
发明人： Hong Zhu , Zhihai Teng
摘要： A power station and an adaptor are provided. The power station includes a battery pack and an adaptor. The adaptor includes a housing, a battery pack interface, a protecting frame for protecting the housing and disposed on the outside of the housing, at least one AC output port and at least one DC output port. The protecting frame includes a top seat at the top portion of the housing, a bottom seat at the bottom seat of the housing and a plurality of connecting bars respectively connected the top seat and the bottom seat. The output voltage of the DC output port is lower than the rated voltage of the battery pack.
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公开(公告)号：US10923938B2
公开(公告)日：2021-02-16
申请号：US16014603
申请日：2018-06-21
发明人： Dezhong Yang , Yingdian Xiang , Hong Zhu , Zhijian Lu
摘要： A charging device for charging an electric energy storage device includes a power supply circuit connected to a power supply, an alternating current conversion circuit configured to convert a current from the power supply connected to the power supply circuit to a first alternating current with a preset frequency value, a transformer configured to convert the first alternating current to a second alternating current, wherein a voltage value corresponding to the second alternating current being less than a voltage value corresponding to the first alternating current, and a direct current voltage conversion circuit configured to convert the second alternating current to a direct current with a waveform fluctuating in a preset range, so as to charge an electric energy storage device. The alternating current conversion circuit is connected to the power supply circuit, the transformer is connected to the alternating current conversion circuit, and the direct current voltage conversion circuit is connected to the transformer.
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公开(公告)号：US20190044364A1
公开(公告)日：2019-02-07
申请号：US16014603
申请日：2018-06-21
发明人： Dezhong Yang , Yingdian Xiang , Hong Zhu , Zhijian Lu
摘要： A charging device for charging an electric energy storage device includes a power supply circuit connected to a power supply, an alternating current conversion circuit configured to convert a current from the power supply connected to the power supply circuit to a first alternating current with a preset frequency value, a transformer configured to convert the first alternating current to a second alternating current, wherein a voltage value corresponding to the second alternating current being less than a voltage value corresponding to the first alternating current, and a direct current voltage conversion circuit configured to convert the second alternating current to a direct current with a waveform fluctuating in a preset range, so as to charge an electric energy storage device. The alternating current conversion circuit is connected to the power supply circuit, the transformer is connected to the alternating current conversion circuit, and the direct current voltage conversion circuit is connected to the transformer.
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公开(公告)号：US20240072715A1
公开(公告)日：2024-02-29
申请号：US18489371
申请日：2023-10-18
发明人： Hong Zhu , Pengchen Wang
IPC分类号： H02P29/024
CPC分类号： H02P29/027 , B25F5/00
摘要： A power tool includes a housing, an electric motor, a driver circuit, a control module, and a current detection module. The control module is configured to: acquire a phase current value of the electric motor in real time within periodic time intervals; and turn off an on-state electronic switch within remaining time of a present time interval when the acquired phase current value exceeds a preset current threshold, and turn on an electronic switch which is controlled by the control module at present to be on when a present period of the drive signal ends, where the duration of each time interval among the periodic time intervals is the same as a period corresponding to the drive signal at present, and a period of the drive signal varies randomly within a second preset period range.
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公开(公告)号：US11646691B2
公开(公告)日：2023-05-09
申请号：US17462069
申请日：2021-08-31
发明人： Hong Zhu , Tianxiao Xu
IPC分类号： H02P29/024 , H02P27/06
CPC分类号： H02P29/0241 , H02P27/06
摘要： A power tool includes a motor, a rectifier circuit, and a driver circuit. An input terminal of the rectifier circuit is connected to a power module, an output terminal is connected to a direct current bus, an input terminal of the driver circuit is connected to the direct current bus, an output terminal is connected to the motor, and a bus capacitor is connected between a high voltage terminal and a low voltage terminal of the direct current bus. A first protection circuit is connected to the input terminal of the rectifier circuit and a second protection circuit is connected in parallel to two terminals of the bus capacitor. The first protection circuit is configured to absorb an overvoltage signal on an input side of the rectifier circuit. The second protection circuit is configured to absorb an overvoltage signal of the direct current bus.
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公开(公告)号：US20190341794A1
公开(公告)日：2019-11-07
申请号：US16512555
申请日：2019-07-16
发明人： Hong Zhu , Zhihai Teng
摘要： A power station and an adaptor are provided. The power station includes a battery pack and an adaptor. The adaptor includes a housing, a battery pack interface, a protecting frame for protecting the housing and disposed on the outside of the housing, at least one AC output port and at least one DC output port. The protecting frame includes a top seat at the top portion of the housing, a bottom seat at the bottom seat of the housing and a plurality of connecting bars respectively connected the top seat and the bottom seat. The output voltage of the DC output port is lower than the rated voltage of the battery pack.
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公开(公告)号：US20230271305A1
公开(公告)日：2023-08-31
申请号：US18313062
申请日：2023-05-05
发明人： Hong Zhu , Zhijian Lu
CPC分类号： B25B21/008 , B23Q5/027 , B23Q5/04 , B25F5/001
摘要： A power tool includes a motor including a rotor and multi-phase stator windings; a driver circuit having multiple switch elements for outputting switch signals to drive the motor to rotate; and a controller electrically connected to at least the driver circuit and the motor. The controller is configured to acquire rotor position information of the motor and adjust a resultant magnetic potential of the motor according to the rotor position information such that an output electrical parameter of the motor corresponding to the resultant magnetic potential is within a preset parameter range.
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公开(公告)号：US11296528B2
公开(公告)日：2022-04-05
申请号：US17347937
申请日：2021-06-15
发明人： Hong Zhu , Zhihai Teng
摘要： A power station and an adaptor are provided. The power station includes a battery pack and an adaptor. The adaptor includes a housing, a battery pack interface, a protecting frame for protecting the housing and disposed on the outside of the housing, at least one AC output port and at least one DC output port. The protecting frame includes a top seat at the top portion of the housing, a bottom seat at the bottom seat of the housing and a plurality of connecting bars respectively connected the top seat and the bottom seat. The output voltage of the DC output port is lower than the rated voltage of the battery pack.
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公开(公告)号：US20220103113A1
公开(公告)日：2022-03-31
申请号：US17462069
申请日：2021-08-31
发明人： Hong Zhu , Tianxiao Xu
IPC分类号： H02P29/024 , H02P27/06
摘要： A power tool includes a motor, a rectifier circuit, and a driver circuit. An input terminal of the rectifier circuit is connected to a power module, an output terminal is connected to a direct current bus, an input terminal of the driver circuit is connected to the direct current bus, an output terminal is connected to the motor, and a bus capacitor is connected between a high voltage terminal and a low voltage terminal of the direct current bus. A first protection circuit is connected to the input terminal of the rectifier circuit and a second protection circuit is connected in parallel to two terminals of the bus capacitor. The first protection circuit is configured to absorb an overvoltage signal on an input side of the rectifier circuit. The second protection circuit is configured to absorb an overvoltage signal of the direct current bus.
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