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公开(公告)号：US20240235433A1
公开(公告)日：2024-07-11
申请号：US18615089
申请日：2024-03-25
发明人： Woodrow W. Walker , Jonathan E. Schmitz , Andrew T. Medeiros-Nicholson , Bharat C. Nakum , Brittany Ann Sellnow
CPC分类号： H02P1/18 , B23B45/02 , H02P1/04 , B23B2260/062
摘要： A power tool, such as a drilling power tool, configured to perform an easy hole start operation upon actuation of a trigger. When the trigger is actuated, the motor is driven at a low speed value. The motor speed is increased to a second speed value during a predetermined time threshold and then driven at the second speed value until the trigger is no longer actuated. In some embodiments, the easy hole start operation may be implemented by an easy hole start switch. In some embodiments, if the easy hole start operation persists for a time greater than a predetermined time threshold, then the motor will shut off.
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公开(公告)号：US11942880B2
公开(公告)日：2024-03-26
申请号：US17696320
申请日：2022-03-16
发明人： Woodrow W. Walker , Jonathan E. Schmitz , Andrew T. Medeiros-Nicholson , Bharat C. Nakum , Brittany Ann Sellnow
CPC分类号： H02P1/18 , B23B45/02 , H02P1/04 , B23B2260/062
摘要： A power tool, such as a drilling power tool, configured to perform an easy hole start operation upon actuation of a trigger. When the trigger is actuated, the motor is driven at a low speed value. The motor speed is increased to a second speed value during a predetermined time threshold and then driven at the second speed value until the trigger is no longer actuated. In some embodiments, the easy hole start operation may be implemented by an easy hole start switch. In some embodiments, if the easy hole start operation persists for a time greater than a predetermined time threshold, then the motor will shut off.
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公开(公告)号：US11863093B2
公开(公告)日：2024-01-02
申请号：US17761657
申请日：2020-08-20
申请人： Nidec Corporation
发明人： Tomohiro Fukumura , Linfeng Lan
摘要： A first torque estimator determines a first torque estimation value according to a cross product method, and a second torque estimator determines a second torque estimation value according to an energy method. A torque weight adjuster adjusts, using a weighting coefficient calculated in accordance with a predetermined condition, weightings respectively applied to these two types of torque estimation values, and outputs a torque estimation value.
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公开(公告)号：US11831259B2
公开(公告)日：2023-11-28
申请号：US17682136
申请日：2022-02-28
CPC分类号： H02P1/10
摘要： Provided is a motor control apparatus that suppresses a steep rush current to a charging circuit and that can quickly start driving of a motor without depending on a current-limiting resistor. The motor control apparatus according to the present disclosure includes an inverter for driving a motor, a charging circuit for supplying electric power to the inverter, a relay circuit for connecting a charging circuit and a power supply terminal, a control unit for controlling the inverter and the relay circuit, and a pre-charging circuit that is provided in parallel with the relay circuit, that starts charging from the power supply terminal to the charging circuit after a power switch for connecting an external power source with the power supply terminal is turned on, and that completes charging of the charging circuit before the control unit starts operation thereof.
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公开(公告)号：US11791619B2
公开(公告)日：2023-10-17
申请号：US16756307
申请日：2018-08-29
发明人： Xin Zhou , Huaqiang Li , Thomas Ruchti
CPC分类号： H02H7/0833 , H02H1/0007
摘要： A combination motor control device includes a power circuit (180) structured to sense voltage and/or current flowing through the combination motor control device, a semiconductor switching and interruption circuit (170) including a number of solid state transistors and being operable to turn on to allow power to flow through the combination motor control device and to turn off to stop allowing power to flow through the combination motor control device, and a control circuit (190) structured detect faults in power flowing through the combination motor control device based on the sensed voltage and/or current, to control the semiconductor switching and interruption circuit (170) to provide a motor starter and/or motor controller functionality, and to control the semiconductor switching and interruption circuit (170) to turn off in response to detecting a fault in power flowing through the combination motor control device.
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公开(公告)号：US11682987B2
公开(公告)日：2023-06-20
申请号：US17051510
申请日：2019-05-02
发明人： Hao Hu , Yong Lin Guo , Bin Li , Yu Wang , Peng Cheng Li
CPC分类号： H02P1/04 , H02P1/025 , H04L12/40 , H04L2012/40273
摘要： A drive control method is applicable to a drive system including a driver, a bus and a motor, the motor being directly connected to the bus in a first connection mode or connected to the driver in a second connection mode. The drive control method includes the driver feeding an electric signal to the motor through the output port and simultaneously detecting its own actual output feature; and the driver determining whether the output port is connected to the bus according to the actual output feature. Upon the output port being determined not to be connected to the bus, the driver starts the motor normally. Upon the output port being determined to be connected to the bus, the driver disconnects the output port. In addition, a corresponding drive system, a processing system and a storage medium are disclosed.
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公开(公告)号：US11479211B2
公开(公告)日：2022-10-25
申请号：US16976359
申请日：2019-02-14
申请人： DENSO CORPORATION
发明人： Yohei Natsume
IPC分类号： B60S1/08 , H02P7/03 , G01R31/34 , H01M50/569 , H02P1/04
摘要： A voltage divider circuit is configured by a resistor having one end connected to a positive electrode of a battery configuring a power source and another end connected to a first terminal that is a motor terminal on one side of a wiper motor, and a FET having one end connected to the first terminal and another end grounded. The voltage divider circuit lowers a voltage of the battery to a test voltage that does not cause the wiper motor to rotate. A microcomputer detects a detected voltage that is a voltage output from the voltage divider circuit to a second terminal that is a motor terminal on the other side of the wiper motor via the first terminal of the wiper motor and the wiper motor, and computes a motor terminal voltage, this being a potential difference between the first terminal and the second terminal, from the detected voltage.
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公开(公告)号：US20220131491A1
公开(公告)日：2022-04-28
申请号：US17185969
申请日：2021-02-26
发明人： KUN-MIN CHEN
摘要： A motor driving circuit and a motor driving method are provided. The motor driving circuit is used to drive the motor and includes an inverter circuit, a control circuit, a current-limiting circuit, a start circuit and a transient circuit. The control circuit controls the inverter circuit to drive the motor with a motor control current according to a set current limit value indicated by a current-limiting signal, and outputs a steady state ready signal in response to the motor reaching a steady state. The current-limiting circuit generates the current-limiting signal according to a start state signal, or generates the current-limiting signal according to a transient signal. The start circuit outputs the start state signal when the motor starts. The transient circuit detects whether the motor is in a transient state, and outputs the transient signal in response to the motor being in a transient state.
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公开(公告)号：US20210400157A1
公开(公告)日：2021-12-23
申请号：US17464541
申请日：2021-09-01
发明人： Yuta Nito
摘要： An apparatus according to the aspect of the embodiments includes a phase determiner configured to determine a rotational phase of a rotor, a speed determiner configured to determine a rotational speed of the rotor, a controller having a first control mode for controlling the motor by supplying constant currents to windings, and a discriminator configured to discriminate whether a rotation of the motor is abnormal based on the rotational speed when the rotational speed corresponding to a command speed is equal to or higher than a predetermined value in a state where the controller is controlling the motor in the first control mode. When a signal output from the discriminator indicates that the rotation of the motor is abnormal, the controller stops the motor. When the signal output from the discriminator indicates that the rotation is not abnormal, the controller continues a drive of the motor.
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公开(公告)号：US20210387742A1
公开(公告)日：2021-12-16
申请号：US17446341
申请日：2021-08-30
摘要： A propulsion system is described that includes an electrical bus, a generator configured to provide electrical power to the electrical bus, a plurality of propulsors configured to provide thrust by simultaneously being driven by the electrical power at the electrical bus, and a controller. The controller is configured to synchronize a rotational speed of an individual propulsor from the plurality of propulsors with a rotational speed of the generator after the individual propulsor has become unsynchronized with the rotational speed of the generator by controlling at least one of the rotational speed of the generator, nozzle area of the individual propulsor, or a pitch angle of the individual propulsor.
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