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公开(公告)号：US20220329192A1
公开(公告)日：2022-10-13
申请号：US17715013
申请日：2022-04-06
发明人： Satoshi Shimazu , Yuhi Nakada
IPC分类号： H02P27/06 , H02P29/032
摘要： An inverter device is provided. The inverter device converts power from a power source and drives a motor. The inverter device includes an inverter circuit having a switch, a driver circuit that switches the switch on and off, and a controller that controls the driver circuit. The controller has a speed calculator used to calculate a minimum speed of the motor based on a power source voltage. After the controller performs fail-safe control, when a speed of the motor is less than the minimum speed, the fail-safe control is ended.
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公开(公告)号：US20220173640A1
公开(公告)日：2022-06-02
申请号：US17522986
申请日：2021-11-10
发明人： Naoki IWAGAMI
摘要： A capacitor module that smooths a voltage of an inverter circuit includes a supply assembly including a connection terminal to the inverter circuit, an alternating-current assembly including a capacitor and a first bus bar, and a direct-current assembly including a second bus bar connecting a DC power source and the supply assembly. The alternating-current assembly and the direct-current assembly are side by side in a plan view and one side view of the capacitor module, and are arranged with the side surfaces thereof opposing each other in an opposite side view. The supply assembly is located inside an outer peripheral region collectively surrounding both the alternating-current assembly and the direct-current assembly in the plan view.
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公开(公告)号：US11205986B2
公开(公告)日：2021-12-21
申请号：US16795831
申请日：2020-02-20
发明人： Yuhi Nakada , Ryo Tachibana , Koji Mukaiyama
摘要： An inverter device includes a motor, a power supply that supplies the motor with electric current, an inverter that, during regenerative operation of the motor, performs switching between a first state in which regenerative current generated in the motor is returned to the motor again and a second state in which the regenerative current is supplied to the power supply, a first detector that detects a first condition electrically acting on the inverter, a second detector that detects a second condition electrically acting on the power supply, and a determiner that performs a first determination to perform switching between the first state and the second state, based on a detection result by the first detector or the second detector.
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公开(公告)号：US20210006188A1
公开(公告)日：2021-01-07
申请号：US16770184
申请日：2018-11-22
发明人： Shuji ENDO , Hajime NAKANE , Takuya YOKOZUKA , Mikio MORISHIMA , Tokuji TATEWAKI
摘要： A technique for reducing an operation noise even when a high-pass filter is used for controlling a motor is provided. A controller is used in a motor control system for driving a motor used for position control by using a drive circuit and an inverter. The controller includes a current control block for receiving a motor current and outputting a reference voltage, a motor control circuit for outputting a signal indicating a duty ratio from the reference voltage output from the current control block, a dead band compensation block for calculating a compensation value of a non-linear element of a drive system, and an adder. The dead band compensation block outputs a duty value corresponding to the dead band at a timing at which the motor current crosses zero. The adder adds the duty value to a signal indicating the duty ratio and outputs the signal.
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公开(公告)号：US10886865B2
公开(公告)日：2021-01-05
申请号：US16392672
申请日：2019-04-24
发明人： Takeshi Arai
摘要： A motor controller that controls a motor including two windings includes a calculator to compute a current instruction value to drive the motor, a first motor driver to supply a first current to one of the windings based on the current instruction value, a second motor driver to supply a second current to the other of the windings based on the current instruction value, a first current detector to detect the first current supplied to the motor from the first motor driver, and a second current detector to detect the second current supplied to the motor from the second motor driver. The calculator supplies a first forced current to the first motor driver, and a second forced current in opposite phase of the first forced current to the second motor driver to determine an abnormality of the first current detector and/or the second current detector.
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公开(公告)号：US10293766B2
公开(公告)日：2019-05-21
申请号：US15251004
申请日：2016-08-30
发明人： Yutaka Watanabe
摘要： An electrical parking brake device includes an operation switch and a control circuit. The operation switch includes a switch button, miniature switches, operation switch terminals and inside conductors, the switch button being in one of an On state, an Off state and a neutral state, the miniature switches operating in conjunction with the state of the switch button. The control circuit includes control circuit terminals, a switch verification circuit, management circuitry and brake application command circuitry, the management circuitry managing the electrical parking brake device. The operation switch defines closed circuits that are independent in terms of a pair of the operation switch terminals, for each of the operating states. The closed circuits are closed circuits that, when one or more of the miniature switches fail, avoids influence of the failure, by the miniature switches other than the one or more failing miniature switches.
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公开(公告)号：US10082571B2
公开(公告)日：2018-09-25
申请号：US14862456
申请日：2015-09-23
发明人： Naoya Takeda
CPC分类号： G01S13/867 , G01S13/931 , G01S2007/027
摘要： A monitoring apparatus includes an image-forming optical system aimed forward, an image sensor, an antenna, a first circuit board, a waveguide, an upper case, an information-processing circuit, a second circuit board, a connector, and a power-supply circuit. The connector is disposed at a rear side relative to the image-forming optical system. The power-supply circuit includes at least one capacitor, and a capacitor that is positioned at a highest location out of all of the at least one capacitor is disposed at a rear side relative to the image-forming optical system, which prevents the capacitor from obstructing the visual field of the image-forming optical system. Thus, the image-forming optical system is able to be located close to the power-supply circuit because the monitoring apparatus is very small in height.
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公开(公告)号：US11296637B2
公开(公告)日：2022-04-05
申请号：US16733259
申请日：2020-01-03
发明人： Linfeng Lan , Tomonari Mori , Ryo Itaba , Tokuji Tatewaki
摘要： A control device includes angular velocity detecting circuitry, feedback circuitry, torque command calculation circuitry, a limiter, a drive controller, and correction circuitry. The angular velocity detecting circuitry detects an angular velocity of a motor. The feedback circuitry obtains a feedback value from the angular velocity. The torque command calculation circuitry obtains a torque command value according to a superordinate torque command value supplied from a superordinate device and the feedback value. The limiter limits the torque command value obtained by the torque command calculation circuitry so as not to exceed a preset torque upper limit value. The drive controller performs a drive control of the motor according to the limited torque command value. The correction circuitry corrects the superordinate torque command value or the torque command value according to the feedback value and the superordinate torque command value.
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公开(公告)号：US11139766B2
公开(公告)日：2021-10-05
申请号：US16770179
申请日：2018-11-22
发明人： Shuji Endo , Hajime Nakane , Takuya Yokozuka , Mikio Morishima , Tokuji Tatewaki
摘要： A technique for reducing an operation noise even when a high-pass filter is used for controlling a motor is provided. A controller is used in a motor control system for driving a motor by using a drive circuit and an inverter. The controller includes a current control block. The controller performs feedforward control by using a current value, compensates for a term of a self-inductance of the motor included in a current control block by an inverse model, compensates for a phase characteristic of a transfer function of the inverse model by an advance component, and corrects a gain characteristic of the transfer function of the inverse model by a function of a physical quantity obtained based on an angular velocity of the motor, thereby compensating for a phase delay and a gain reduction of a torque output generated by the self-inductance.
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公开(公告)号：US10924054B2
公开(公告)日：2021-02-16
申请号：US16385027
申请日：2019-04-16
发明人： Osamu Maeshima
IPC分类号： G01R31/42 , H02P29/024 , B62D5/04 , H02M1/32 , H02M7/48
摘要： A failure diagnosis method for an inverter circuit includes a first monitoring step of monitoring an inter-terminal voltage between a high-potential-side terminal and a low-potential-side terminal of each of a plurality of driving devices included in the inverter circuit, and a second monitoring step of monitoring a power supply voltage of the inverter circuit. A determination step of determining whether there is a failure in each of the driving devices from a value of the inter-terminal voltage and a value of the power supply voltage is included.
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