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1.发明公开
公开(公告)号：EP3379718A1
公开(公告)日：2018-09-26
申请号：EP18161944.6
申请日：2018-03-15
CPC分类号： H02P21/0003 , H02P21/0021 , H02P21/0085 , H02P21/50 , H02P27/047 , H02P27/08 , H02P27/085
摘要： Provided is an inverter apparatus (1) of a 3-phase motor which is configured to perform v/f control, the inverter apparatus including: a voltage command unit (12) which is configured to generate a voltage command on the basis of a speed command of the 3-phase motor; a correction command unit (18) which is configured to generate a correction command by adding a command of stopping a PWM control pulse signal to the voltage command in a period of at least a part of a zero voltage region of the voltage command; and an inverter main circuit (20) which is configured to switch a switching element group with a pulse signal generated on the basis of the correction command and thereby convert a DC voltage into a 3-phase AC voltage.
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公开(公告)号：EP3382873A2
公开(公告)日：2018-10-03
申请号：EP18164389.1
申请日：2018-03-27
CPC分类号： H02M3/155 , H02M1/4225 , H02M1/44 , H02M2001/007 , Y02B70/126
摘要： Loss and noise in a reactor are reduced while upsizing of the reactor is avoided. A converter device includes a rectification unit that performs full-wave rectification on an input voltage from an AC power source, a switching element connected between output terminals of the rectification unit, a capacitor connected in parallel with the switching element, a reactor provided in an electric power line between the rectification unit and the switching element, and a converter control unit that controls on/off of the switching element. The converter control unit provides, in on/off control of the switching element, a switching suspension time period during which an on state of the switching element is continuously maintained.
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公开(公告)号：EP3525338A1
公开(公告)日：2019-08-14
申请号：EP19155175.3
申请日：2019-02-01
发明人： Aiba, Kenichi , Satou, Takeshi , Sumito, Kiyotaka , Shimizu, Kenji , Watanabe, Takamasa , Sunohara, Tetsu
摘要： A motor controller includes a speed control unit that commands values for currents supplied to a motor in order to rotate the motor at a target speed, an inductance change unit that changes an inductance of the motor on the basis of information on a torque axis current among the values of the currents supplied to the motor, a position estimation unit that estimates a rotation position of the motor from the values of the currents by using the inductance, an average torque calculation section that calculates an average load torque of the motor, a torque pattern storage section that stores a normalized torque pattern serving as a reference for changing an output torque of the motor in accordance with the rotation position of the motor, and a torque control unit that generates a compensation torque pattern for changing the output torque of the motor in accordance with the rotation position of the motor by a product of the average load torque and the normalized torque pattern, and corrects the values of the currents supplied to the motor.
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公开(公告)号：EP3382873A3
公开(公告)日：2018-10-10
申请号：EP18164389.1
申请日：2018-03-27
CPC分类号： H02M3/155 , H02M1/4225 , H02M1/44 , H02M2001/007 , Y02B70/126
摘要： Loss and noise in a reactor are reduced while upsizing of the reactor is avoided. A converter device includes a rectification unit that performs full-wave rectification on an input voltage from an AC power source, a switching element connected between output terminals of the rectification unit, a capacitor connected in parallel with the switching element, a reactor provided in an electric power line between the rectification unit and the switching element, and a converter control unit that controls on/off of the switching element. The converter control unit provides, in on/off control of the switching element, a switching suspension time period during which an on state of the switching element is continuously maintained.
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