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公开(公告)号：US20230318475A1
公开(公告)日：2023-10-05
申请号：US18129147
申请日：2023-03-31
申请人： Lenze Swiss AG
CPC分类号： H02M5/2932 , H02M1/0064 , H02M1/0012
摘要： A frequency converter includes an intermediate circuit capacitor at which an intermediate circuit voltage is present, an inverter for generating control signals with a variable frequency and a variable amplitude from the intermediate circuit voltage, and a circuit for measuring the intermediate circuit voltage. The circuit for measuring the intermediate circuit voltage includes a resistive voltage divider, the intermediate circuit voltage being applied to the first side of the resistive voltage divider and the second side of the latter being electrically connected to a reference potential, a capacitive voltage divider, the intermediate circuit voltage being applied to the first side of the capacitive voltage divider and the second side of the latter being electrically connected to the reference potential, at least one connecting node of resistors of the resistive voltage divider being electrically connected to a corresponding connecting node of capacitors of the capacitive voltage divider, and an evaluation unit which evaluates a measurement voltage generated by means of the resistive voltage divider and the capacitive voltage divider for the purpose of measuring the intermediate circuit voltage.
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公开(公告)号：US20230024063A1
公开(公告)日：2023-01-26
申请号：US17778629
申请日：2020-11-18
申请人： Lenze Swiss AG
摘要： A frequency converter, includes: a DC link, wherein the DC link has a first connection pole at which a positive link potential is present during operation of the frequency converter, and a second connection pole at which a negative link potential is present during operation of the frequency converter; an inverter, wherein the inverter has a first connection pole at which a positive inverter potential is present during operation of the frequency converter, and a second connection pole at which a negative inverter potential is present during operation of the frequency converter; a resistive shunt which is looped in between the first connection pole of the DC link and the first connection pole of the inverter; a differential amplifier which is designed to generate a test voltage from a potential difference across the resistive shunt; and an evaluation unit which is designed to detect a ground fault based on the test voltage.
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3.发明公开公开(公告)号：US20230238899A1
公开(公告)日：2023-07-27
申请号：US17912562
申请日：2021-01-20
申请人： Lenze Swiss AG
摘要： A circuit for controlling an electromechanical holding brake, includes: at least one halfwave rectifier, which generates a pulsed DC voltage from a mains AC voltage, and a phase gating circuit which is designed to generate a control signal for the electromechanical holding brake from the pulsed DC voltage by means of the phase gating.
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公开(公告)号：US20230066034A1
公开(公告)日：2023-03-02
申请号：US17896180
申请日：2022-08-26
申请人： Lenze Swiss AG
摘要： A frequency converter includes a monitoring unit that has respective first drive signals of gate drivers of a bidirectional power converter applied to it and that is designed to detect the failure of at least one mains phase of a three-phase AC grid voltage that is supplied to the bidirectional power converter based on a temporal profile of the respective first drive signals.
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公开(公告)号：US20230014942A1
公开(公告)日：2023-01-19
申请号：US17779294
申请日：2020-11-25
申请人： Lenze Swiss AG
发明人： Andreas BURGERMEISTER , Beat HEIM , Dieter TANNER
IPC分类号： H05K7/14
摘要： A frequency converter class contains various types of frequency converters. A first type of frequency converters of the frequency converter class consists of: power electronics, a carrier element, and a housing element of a first housing element type that, in connection with the carrier element, forms a housing for the power electronics, and a second type of frequency converters of the frequency converter class consists of: the power electronics, the carrier element and a housing element of a second housing element type that, in connection with the carrier element, forms a housing for the power electronics.
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公开(公告)号：US20230060651A1
公开(公告)日：2023-03-02
申请号：US17896132
申请日：2022-08-26
申请人： Lenze Swiss AG
IPC分类号： H02M7/5387 , H02M1/32
摘要： A frequency converter has a first intermediate circuit arm on which a positive intermediate circuit potential is present during operation of the frequency converter, a second intermediate circuit arm on which a negative intermediate circuit potential is present during operation of the frequency converter, an inverter having a first input terminal and a second input terminal, wherein the inverter has a number of bridge arms, wherein each of the bridge arms has an upper semiconductor switching device and a lower semiconductor switching device, wherein the upper semiconductor switching device and the lower semiconductor switching device are looped-in in series between the first input terminal and the second input terminal, and wherein a connection node of the upper semiconductor switching device and the lower semiconductor switching device forms an output terminal of the inverter. A reactor is looped-in between the first intermediate circuit arm and the first input terminal of the inverter. A shunt resistor is looped-in between the second intermediate circuit arm and the second input terminal of the inverter. An evaluation unit is configured, on the basis of a voltage across the shunt resistor, to detect a ground fault on the upper semi-conductor switching devices of the inverter.
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公开(公告)号：US20230023737A1
公开(公告)日：2023-01-26
申请号：US17779403
申请日：2020-11-24
申请人： Lenze Swiss AG
发明人： Andreas BURGERMEISTER , Beat HEIM , Dieter TANNER
IPC分类号： H05K7/20
摘要： A power converter includes: a first circuit board; a cooling body; a housing, wherein the cooling body and the housing surround the first circuit board; a heat-generating component which is arranged on a side of the first circuit board facing the cooling body and which is coupled to the cooling body in a heat-conducting manner; and further components. The cooling body, the housing and the first circuit board border a first volume, in which the heat-generating component is arranged. The cooling body, the housing and the first circuit board border a second volume, in which the further components are arranged.
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