Invention Grant
- Patent Title: Electronic braking in a power tool
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Application No.: US17372936Application Date: 2021-07-12
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Publication No.: US11695352B2Publication Date: 2023-07-04
- Inventor: Carl B. Westerby , Timothy R. Obermann , Alex Huber
- Applicant: MILWAUKEE ELECTRIC TOOL CORPORATION
- Applicant Address: US WI Brookfield
- Assignee: Milwaukee Electric Tool Corporation
- Current Assignee: Milwaukee Electric Tool Corporation
- Current Assignee Address: US WI Brookfield
- Agency: Michael Best & Friedrich LLP
- Main IPC: H02P3/14
- IPC: H02P3/14 ; H02P7/29 ; B25F5/00 ; H02P3/22 ; B24B23/02 ; B24B47/12 ; B25F5/02

Abstract:
A power tool includes a three-phase DC motor, a power switching network, a power source, and an electronic processor. A first phase of the motor is connected between a first low side electronic switch and a power source electronic switch, and connected to the power source via a first high side electronic switch in parallel with a diode. The electronic processor is configured to receive an indication to stop the motor during operation of the motor and activate the first low side electronic switch and a second low side electronic switch for a first predetermined time responsive to receiving the indication such that a back-electromagnetic force generated by the motor is stored in the first phase. The electronic processor is configured to deactivate the second low side electronic switch after the first predetermined time such that a first regenerative current is provided to the power source via the diode.
Public/Granted literature
- US20210344289A1 ELECTRONIC BRAKING IN A POWER TOOL Public/Granted day:2021-11-04
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