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71.发明申请公开(公告)号：US20230026306A1
公开(公告)日：2023-01-26
申请号：US17814171
申请日：2022-07-21
摘要： A controller for a motor system includes an input terminal to receive a signal indicating a speed of an electric motor and a regenerative brake current interpolator to indicate a brake current to be applied to the electric motor responsive to the speed of the electric motor. Values of the brake current vary with variation of the speed of the electric motor.
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公开(公告)号：US20230023055A1
公开(公告)日：2023-01-26
申请号：US17384582
申请日：2021-07-23
摘要： Described examples include a method that includes setting a reference iq signal in a field-oriented control of a motor such that the field-oriented control modulates power from a power supply using a modulator to apply a torque on the motor that is opposite to a kinetic energy applied to the motor. The method also includes setting a reference id signal in the field-oriented control such that the motor current provided to the power supply is reduced.
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公开(公告)号：US20230006576A1
公开(公告)日：2023-01-05
申请号：US17364540
申请日：2021-06-30
摘要： A motor controller integrated circuit (IC) includes a storage device containing software, and a processor core. The processor core has an output adapted to be coupled to a motor. The processor core is configured to execute the software to operate the motor in an open-loop control, calculate first and second orthogonal components of a back electromotive force (BEMF), calculate a total BEMF value, and determine that the first orthogonal component is within a threshold of the total BEMF value. The processor core is further configured to, responsive to the first orthogonal component being within the threshold of the total BEMF value, operate the motor in a closed-loop control.
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74.发明申请公开(公告)号：US20220416688A1
公开(公告)日：2022-12-29
申请号：US17777344
申请日：2020-10-27
申请人： HITACHI ASTEMO, LTD.
发明人： Yasuhiro ISHIKAWA , Ryohichi INADA
IPC分类号： H02M7/5387 , H02M1/00 , H02P27/08 , H02P21/22
摘要： A three-phase/two-phase conversion unit 43 generates a composite vector iαβ of three-phase AC currents based on AC currents iu, iv, and iw. An electrical angle calculation unit 44 outputs the electrical angle of the composite vector iαβ with reference to the U-phase AC current iu. A quadrant calculation unit 45 obtains which quadrant of the first to sixth quadrants partitioned in advance the acquired electrical angle corresponds to, confirms whether the composite vector iαβ passes through the set quadrant, and outputs quadrant information thereof. A failure detection unit 47 determines whether the composite vector iαβ has rotated from the first quadrant to the sixth quadrant, and when there is a quadrant that has not been passed, considers that it is a failure state, specifies a failure part of the switching element from the relationship between the electrical angle and the failure part, and outputs failure information to a PWM signal generation unit 42.
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公开(公告)号：US11527948B2
公开(公告)日：2022-12-13
申请号：US17804877
申请日：2022-06-01
申请人： DAIHEN Corporation
发明人： Akihiro Ohori , Nobuyuki Hattori
摘要： A signal processor is configured to perform a process equivalent to performing a series of fixed-to-rotating coordinate conversion, a predetermined process and then rotating-to-fixed coordinate conversion, while maintaining linearity and time-invariance. The signal processor performs a process given by the following matrix G: G = [ F ( s + j ω 0 ) + F ( s - j ω 0 ) 2 F ( s + j ω 0 ) - F ( s - j ω 0 ) 2 - F ( s + j ω 0 ) - F ( s - j ω 0 ) 2 j F ( s + j ω 0 ) + F ( s - j ω 0 ) 2 ] where F(s) is a transfer function representing the predetermined process, ω0 is a predetermined angular frequency and j is the imaginary unit.
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公开(公告)号：US20220393627A1
公开(公告)日：2022-12-08
申请号：US17761813
申请日：2019-11-27
发明人： Jun KITAGAWA , Tatsuya MORI , Hiroko IKEDA , Haruna KOYAMA , Kenta KUBO
摘要： To provide a motor controller which can suppress occurrence of a torque difference between systems, even if a DC voltage difference occurs between systems, in the case where each system is provided with a DC power source. A motor controller is provided with a first controller that controls so that the first q-axis current detection value approaches the second q-axis current detection value or the second q-axis current command value obtained from the second controller, when determining that the first DC voltage is higher than the second DC voltage; and a second controller that controls so that the second q-axis current detection value approaches the first q-axis current detection value or the first q-axis current command value obtained from the first controller, when determining that the second DC voltage is higher than the first DC voltage.
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公开(公告)号：US11518208B2
公开(公告)日：2022-12-06
申请号：US17003256
申请日：2020-08-26
发明人： Stefan Lekon , Holger Gohmert , Benjamin Hertrich
IPC分类号： H02P21/10 , H02P21/20 , H02P21/22 , B60G21/055 , B60G17/015
摘要： A method of operating an adjustable roll stabilizer (1) of a motor vehicle. The adjustable roll stabilizer (1) has an actuator (2) which can be rotated through a system angle (α) relative to a rotational axis (3) in order to twist two stabilizer sections (6a, 6b), connected thereto, relative to one another. The stabilizer sections (6a, 6b) are each a radial spaced away from the rotational axis (3) and each is coupled to a wheel suspension (7a, 7b, 8a, 8b, 9a, 9b). The method includes controlling the actuator with a field-orientated regulator (20) as a function of input signals which include at least a target motor torque (21), and checking the control of the actuator (2), brought about by the field-orientated regulator (20), for plausibility independently of the field-orientated regulator (20).
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公开(公告)号：US20220385219A1
公开(公告)日：2022-12-01
申请号：US17749877
申请日：2022-05-20
申请人： Hitachi Astemo, Ltd.
发明人： Takami SUZUKI
摘要： This motor control device includes a vector control unit. The vector control unit includes: a current control unit that calculates a before-compensation d-axis voltage command value and a before-compensation q-axis voltage command value; a first non-interference control unit that calculates a first d-axis non-interference compensation value on the basis of a q-axis current command value to compensate for the before-compensation d-axis voltage command value and calculates a first q-axis non-interference compensation value on the basis of a d-axis current command value to compensate for the before-compensation q-axis voltage command value; and a second non-interference control unit that cancels out an interference component of a d-axis current generated in a specific rotation range of a motor with a q-axis current and an interference component of the q-axis current generated in the specific rotation range with the d-axis current by using a variable integral gain varying depending on a motor rotation speed.
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公开(公告)号：US20220385218A1
公开(公告)日：2022-12-01
申请号：US17305692
申请日：2021-07-13
发明人： Chung-Wei Huang
摘要： A sensorless motor rotor angle correction method includes: outputting a direct-axis pulse voltage to generate a direct-axis current and a quadrature-axis current; determining whether an angle difference is zero; outputting a positive direct-axis excitation voltage when the angle difference is zero, and recording an excitation time required to reach a predetermined positive current value; outputting a negative direct-axis excitation voltage, so that the direct-axis current returns to an initial current value; outputting a negative direct-axis excitation voltage for the excitation time to obtain a maximum negative current value; outputting a positive excitation voltage, so that the direct-axis current returns to the initial current value; correcting an orientation of a synchronous rotation coordinate axis if the maximum negative current value is greater than the predetermined positive current value.
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公开(公告)号：US11515813B2
公开(公告)日：2022-11-29
申请号：US16365023
申请日：2019-03-26
发明人： Prerit Pramod , Julie A. Kleinau
摘要： According to one or more embodiments, a motor control system that provides torque ripple compensation includes a current regulator that receives a first current command corresponding to an input torque command. The current regulator further generates a first voltage command based on the first current command using a first transformation matrix. The current regulator further receives a second current command corresponding to a torque ripple to be compensated. The current regulator further generates a second voltage command based on the second current command using a second transformation matrix. The current regulator further computes a final voltage command using the first voltage command and the second current command, the final voltage command being applied to a motor.
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