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公开(公告)号：US20230139060A1
公开(公告)日：2023-05-04
申请号：US17890076
申请日：2022-08-17
摘要： A valve actuator includes a motor, an AC power source, a DC braking system, and a control system. The control system is configured to control the AC power source to apply an AC voltage to the motor to drive a valve toward a closed position. The control system is configured to disconnect the AC voltage from the motor before the valve reaches the closed position. The control system is configured to control the DC braking system to apply a DC voltage to the motor to stop motion of the valve.
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公开(公告)号：US11377893B2
公开(公告)日：2022-07-05
申请号：US16465213
申请日：2017-12-20
摘要： A swing door operator for moving at least one door leaf between a first and a second position includes a motor and a mechanical drive unit connected to and capable of moving the at least one door leaf from the first position to the second position, and a braking circuit connected to the motor. The braking circuit includes a diode circuit arranged to apply a voltage drop to the motor. The motor is adapted to act as a generator and is configured to generate a voltage when the drive unit moves the at least one door leaf, and to brake a movement of the at least one door leaf when the voltage generated by the motor is larger than the voltage drop applied by the diode circuit. The diode circuit includes at least three diodes connected in series.
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公开(公告)号：US20220185250A1
公开(公告)日：2022-06-16
申请号：US17439939
申请日：2020-03-18
申请人： Hitachi Astemo, Ltd.
摘要： An object of the invention is to provide a motor control device capable of realizing a redundancy while suppressing an increase in the number of parts and the number of connection signal lines.
The invention includes angle sensors 102 and 103 for detecting a rotation angle of a motor, MPU 107 for controlling the motor based on a stroke sensor 117 and receiving the detected value of the angle sensor 102, MPU 108 for controlling the motor based on the stroke sensor 117 and receiving the detected value of the angle sensor 103, and communication units 115 and 116 for transmitting and receiving signals between the MPUs 107 and 108. The MPU 107 includes an angle sensor failure detecting unit 114 for detecting a failure of the angle sensors 102 and 103, according to the detected value of the angle sensor 102, the detected value of the angle sensor 103 received through the communication unit 115, and a control angle of the motor created in response to the stroke sensor 117.-
公开(公告)号：US11108348B2
公开(公告)日：2021-08-31
申请号：US16524220
申请日：2019-07-29
发明人： Jörg Hartzsch
摘要： In a method for generating a blocking moment in a standstill state of an electrically commutated electric motor having at least two windings, on which electric motor a possibly varying load moment acts from outside in the standstill state, first, a blocking current is supplied at a maximum value into a first winding. This blocking current is successively reduced to, possibly, a minimum value. From that moment the inductivity of the electric motor is controlled, namely by controlling the blocking current if the control deviation between the actual value and the set value of the inductivity exceeds a predetermined threshold value. Thereby, it is possible to control the blocking current in an adaptive manner insofar as, despite a varying load moment, the standstill state of the electric motor can be maintained by varying the blocking current.
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公开(公告)号：US20200313578A1
公开(公告)日：2020-10-01
申请号：US16771675
申请日：2018-12-04
申请人： NIDEC CORPORATION
发明人： Hideyuki ODAGIRI
摘要： The brake driving control circuit, which controls an electromagnetic brake that releases the brake by applying a current, is provided with: a first rectifying element provided between a first power supply of a first circuit voltage and one terminal of the electromagnetic brake; a cut-off switch inserted into a line through which the first power supply supplies power; a first switching element provided between the other terminal of the electromagnetic brake and a ground point; and a second switching element and a second rectifying element provided in series between a second power supply of a second circuit voltage, which is different from the first circuit voltage, and the one terminal of the electromagnetic brake.
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公开(公告)号：US10224839B2
公开(公告)日：2019-03-05
申请号：US15043054
申请日：2016-02-12
申请人： Dan Dietrich
发明人： Dan Dietrich
IPC分类号： E04H4/16 , H02P3/08 , H02P1/22 , H02P29/024
摘要： A smart power switch for a swimming pool vacuum having a battery powered motor for driving a propeller within a vacuum head to create thrust and suction; the power switch including a microprocessor combined with two integrated motor-driver integrated circuits for driving the motor at different speeds and for detecting and clearing motor jams. Red, green and blue LED indicators notify the user of the state of the motor and motor driver. The microprocessor detects spikes in motor current to determine a motor jam and operates the motor driver to control the motor, including stopping and reversing the motor, to clear an obstruction in the vacuum head.
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公开(公告)号：US10099392B2
公开(公告)日：2018-10-16
申请号：US15221253
申请日：2016-07-27
申请人： MAKITA CORPORATION
发明人： Hidekazu Suda , Motohiro Omura
摘要： Electric scissors comprise a motor, a movable blade, a transmission mechanism, an operation device, an operation signal output device, a control device, a drive circuit, and a forced stop device. The forced stop device is configured to stop the motor when an abnormal state is present in which the value of the operation signal output from the operation signal output device is a value determined in the control device to rotate the motor in a specific rotation direction out of the first and the second rotation directions or to stop the motor, and in which the motor is rotating in a direction opposite to the specific rotation direction.
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公开(公告)号：US20170321610A1
公开(公告)日：2017-11-09
申请号：US15658473
申请日：2017-07-25
发明人： Jay M. Francisco
CPC分类号： F02C7/277 , F01D17/06 , F01D19/00 , F02C7/268 , F02C7/32 , F05B2270/32 , F05B2270/3201 , F05D2220/50 , H02P3/08
摘要： An APU has a gas turbine engine and a starter generator to be selectively driven by the gas turbine engine. A sensor senses windmilling of components associated with the starter generator. A lock feature limits rotation within the starter generator when windmilling is sensed. A method of operation is also disclosed.
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公开(公告)号：US09722334B2
公开(公告)日：2017-08-01
申请号：US13079158
申请日：2011-04-04
IPC分类号： H05B37/02 , B25F5/00 , B25B23/18 , H01R12/70 , H02J7/00 , H05B33/08 , H02P7/285 , H01H9/06 , H01M10/44 , H02J7/04 , H02P7/29 , H01M10/48 , G01R31/36 , H02P3/08 , H01R13/11 , B25F5/02 , H01M10/42 , H02P31/00
CPC分类号： H02J7/0021 , B25F5/02 , B25F5/021 , G01R31/362 , G01R31/3627 , G01R31/3675 , G01R31/3682 , H01H9/061 , H01H2009/065 , H01M10/441 , H01M10/482 , H01M2010/4271 , H01M2010/4278 , H01M2220/30 , H01R12/7005 , H01R13/112 , H02J7/0003 , H02J7/0008 , H02J7/0019 , H02J7/0031 , H02J7/0045 , H02J7/0047 , H02J7/0063 , H02J7/007 , H02J7/045 , H02J2007/004 , H02J2007/0067 , H02P3/08 , H02P7/285 , H02P7/29 , H02P31/00 , H05B33/0806
摘要： A power tool includes a housing coupled to an electrical power source, a motor contained in the housing, and a motor control circuit that controls output speed of the motor. A light unit is coupled to the housing to illuminate a work surface. A light unit control circuit controls illumination of the light unit. A switch unit is coupled to the housing and selectively operable to control the operation of the motor control circuit and the light unit control circuit. The light unit control circuit includes a timer configured to cause the light unit to illuminate a first brightness level when the switch unit is actuated, and to remain illuminated at the first brightness level for a predetermined time period after the trigger is actuated. The predetermined time period restarts if the switch unit is not deactivated before the end of the predetermined time period.
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公开(公告)号：US09654035B1
公开(公告)日：2017-05-16
申请号：US14502821
申请日：2014-09-30
申请人： Sandia Corporation
IPC分类号： G05B11/28 , H02P6/14 , H02P29/024 , H02P3/08 , H02P7/00
摘要： A motor control system for deployment in high temperature environments includes a controller; a first half-bridge circuit that includes a first high-side switching element and a first low-side switching element; a second half-bridge circuit that includes a second high-side switching element and a second low-side switching element; and a third half-bridge circuit that includes a third high-side switching element and a third; low-side switching element. The motor controller is arranged to apply a pulse width modulation (PWM) scheme to switch the first half-bridge circuit, second half-bridge circuit, and third half-bridge circuit to power a motor.
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