Invention Grant
- Patent Title: Electric device
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Application No.: US17606439Application Date: 2020-03-27
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Publication No.: US11750085B2Publication Date: 2023-09-05
- Inventor: Shinya Toyoda
- Applicant: Koki Holdings Co., Ltd.
- Applicant Address: JP Tokyo
- Assignee: Koki Holdings Co., Ltd.
- Current Assignee: Koki Holdings Co., Ltd.
- Current Assignee Address: JP Tokyo
- Agency: JCIPRNET
- Priority: JP 19086245 2019.04.26
- International Application: PCT/JP2020/014094 2020.03.27
- International Announcement: WO2020/217853A 2020.10.29
- Date entered country: 2021-10-25
- Main IPC: H02M1/08
- IPC: H02M1/08 ; H02M1/32 ; H02M7/537 ; H03K17/06 ; H03K17/082 ; B25F5/02 ; H02M7/5387

Abstract:
An electric device is provided which can reduce risk of malfunction. This electric device is provided with a motor (31), an inverter circuit (30) which has switching elements (S1-S6) and which drives the motor (31), and a charge pump circuit (22) which generates the drive voltage of the switching elements (S1-S6). A discharge circuit (a discharge resistor R and a capacitor C1) is provided between a power line to which a drive voltage (VM) of the motor (31) is supplied and an output terminal (a VGT terminal) of the charge pump circuit (22). Energy of the surge voltage (Vs) generated in a parasitic inductance (Ls) when the switching elements (S4-S6) are turned off is absorbed by the discharge circuit (the discharge resistor R and the capacitor C1).
Public/Granted literature
- US20220181969A1 ELECTRIC DEVICE Public/Granted day:2022-06-09
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