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公开(公告)号：US20240364235A1
公开(公告)日：2024-10-31
申请号：US18616752
申请日：2024-03-26
申请人： AcLeap Power Inc.
发明人： Qixue YU , Ming FU , Lishen ZHOU
IPC分类号： H02M7/5387 , H02M1/00 , H02M1/08
CPC分类号： H02M7/53873 , H02M1/0025 , H02M1/083
摘要： In one embodiment, a switching frequency adjusting circuit includes an inverter circuit, a phase difference determining circuit, an average determination circuit, and a loop compensator. The inverter circuit includes an inverter switch configured to switch on and off at a switching frequency. The phase difference determination circuit is configured to obtain a first signal related to an output voltage of the inverter circuit and a second signal related to an output current of the inverter circuit. The average determination circuit is configured to determine a first average value of a first output signal and a second average value of a second output signal, and the loop compensator is configured to compare the first average value or the second average value with a reference value and adjust the switching frequency of the inverter switch based on the comparison result.
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公开(公告)号：US20240364229A1
公开(公告)日：2024-10-31
申请号：US18580783
申请日：2022-05-10
CPC分类号： H02M7/217 , H02M1/08 , H02M3/33573
摘要： An effective technique is applied to a rectifier circuit that performs synchronous rectification using a switching element. The rectifier circuit performs the synchronous rectification using a MOSFET, for example, as the switching element. By using the rectifier circuit, a capacitance of a capacitor for supplying power to a drive circuit can be reduced. As a result, downsizing and cost reduction of the rectifier circuit and the power supply using the rectifier circuit can be achieved.
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公开(公告)号：US20240364207A1
公开(公告)日：2024-10-31
申请号：US18308151
申请日：2023-04-27
摘要： A circuit includes a switching signal generator and synchronization circuitry configured to determine a first time of a switching period based on a switching signal. The circuit further includes a comparison signal generator configured to generate a comparison signal with a first constant rate of change after the first time. The synchronization circuitry is further configured to determine a second time of the switching period based on when current at the inductive element changes from a positive current to a negative current. The comparison signal generator is further configured to generate the comparison signal with a second constant rate of change after the second time. The circuit further includes a threshold detector configured to compare a value of the comparison signal at the end of a target switching period with a threshold value.
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公开(公告)号：US12132390B2
公开(公告)日：2024-10-29
申请号：US17951165
申请日：2022-09-23
发明人： Osamu Ohashi
摘要： An electronic circuit unit includes a trigger circuit and a circuit module. The trigger circuit includes a semiconductor switching element configured to output a switching pulse signal in response to an external trigger signal, a load resistor for the semiconductor switching element, a one-shot pulse circuit configured to convert the switching pulse signal into a one-shot pulse with a predetermined pulse width, and a forcible-reset circuit connected to an input side of the semiconductor switching element. The one-shot pulse circuit includes a coupling capacitor connected to an input side of the semiconductor switching element and a charging resistor for the coupling capacitor. The pulse width of the one-shot pulse is determined by a time constant of the coupling capacitor and the charging resistor. The forcible-reset circuit is configured to temporarily input an on-voltage to the semiconductor switching element so as to forcibly switch the circuit module to the operating mode.
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公开(公告)号：US12126265B2
公开(公告)日：2024-10-22
申请号：US17959611
申请日：2022-10-04
发明人： Yu-Kai Chen , Chau-Chung Song , Hung-Yu Chen
CPC分类号： H02M3/33569 , A01G7/04 , A01M7/0042 , B05B5/10 , B64C39/024 , H02M1/08 , B64D1/18 , B64U2101/00
摘要： A switch mode power supply circuit with high voltage output, an electrostatic spray apparatus and agricultural plant protection apparatus using the same are provided. The switch mode power supply circuit is electrically connected in series with at least a pre-stage power converter and a post-stage power converter. In order to simplify the control, the switch of the pre-stage power converter is omitted, only one switch of the post-stage power converter is adopted to perform synchronous control. Since the multiple sets of power conversion circuits in the previous stage are connected in series, the turn ratio of the transformer in the power converter in the subsequent stage can be reduced. Therefore, the transformer can be miniaturized and the power supply circuit would be more suitable for agricultural plant protection machine and electrostatic spray apparatus.
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公开(公告)号：US20240348243A1
公开(公告)日：2024-10-17
申请号：US18301952
申请日：2023-04-17
发明人： Karel PTACEK , Jaroslav KNOP
IPC分类号： H03K17/082 , H02M1/08 , H02M7/537
CPC分类号： H03K17/0822 , H02M1/08 , H02M7/537 , H03K2217/0063 , H03K2217/0072
摘要： Operating a gate driver. At least one example is a method of operating the gate driver, the method comprising: de-asserting a drive-low terminal of the gate driver; starting a single timer within the gate driver; and after expiration of the single timer asserting a drive-high terminal of the gate driver responsive to assertion of an in-high terminal of the gate driver; and then de-asserting the drive-high terminal; starting the single timer; and after a second expiration of the single timer asserting the drive-low terminal responsive to assertion of an in-low terminal of the gate driver.
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公开(公告)号：US20240348142A1
公开(公告)日：2024-10-17
申请号：US18300646
申请日：2023-04-14
发明人： Basil ALMUKHTAR
CPC分类号： H02M1/0032 , H02M1/083
摘要： A multi-phase power converter includes a digital ramp pulse modulation controller, a digital constant on-time controller, and a driver stage. The digital ramp pulse modulation controller provides a trigger ramp signal in response to an error signal when the multi-phase power converter is not in a green mode, wherein at least a portion of the digital ramp pulse modulation controller is inactive in the green mode. The digital constant on-time controller provides on-time thresholds and off-time thresholds when the multi-phase power converter is in the green mode. The driver stage provides a plurality of drive signals to a corresponding plurality of power stages in response to the trigger ramp signal when the multi-phase power converter is not in the green mode and to the on-time thresholds and the off-time thresholds when the multi-phase power converter is in the green mode.
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8.发明公开公开(公告)号：US20240348080A1
公开(公告)日：2024-10-17
申请号：US18300543
申请日：2023-04-14
CPC分类号： H02J7/02 , B60L53/30 , B60L53/60 , H02J7/345 , H02M1/08 , H02M1/4208 , B60L2210/30
摘要： A system includes: a battery charger to convert AC power to DC power to charge a battery, wherein the battery charger includes: an upper switch to condition an input voltage and input current; a lower switch to condition the input voltage and the input current: an upper silicon controlled rectifier (SCR); a lower SCR; and a bulk capacitor.
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公开(公告)号：US12113445B2
公开(公告)日：2024-10-08
申请号：US18371332
申请日：2023-09-21
发明人： Anders Lind
CPC分类号： H02M3/1588 , H02M1/0009 , H02M1/083 , H02M1/32 , H02M1/42 , H02M1/4225 , H02M7/219 , H02M1/4233
摘要： A method of detecting zero crossings in an AC input voltage at an input of a power converter includes measuring, at a first time, a first voltage. If the first voltage is positive: determining that the first time corresponds to a positive half-cycle of the AC input voltage. If the first voltage is equal to zero: a) determining that the first time corresponds to a negative half-cycle of the AC input voltage; b) turning on a high-side switch of the power converter for a first time period; and c) measuring, during the first time period, a second voltage. If the second voltage is less than a first threshold, turning off the high-side switch and repeating b) and c) after a time delay. If the second voltage is less than a second threshold, maintaining the high-side switch in an ON state for a second time period.
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公开(公告)号：US12107514B2
公开(公告)日：2024-10-01
申请号：US17427995
申请日：2019-10-10
申请人： TMEIC Corporation
发明人： Ryota Okuyama , Hiroki Ishitobi , Takashi Sugiyama
CPC分类号： H02M7/4835 , H02M1/08 , H02M1/4216
摘要： A power conversion device includes: a first control unit and a second control unit that output a first control signal and a second control signal, respectively; a gate circuit that causes a control signal selected from the first control signal and the second control signal to pass through the gate circuit; and a drive circuit that drives a main circuit based on the control signal that passes through the gate circuit. When the second control signal is selected in the state where the first control signal passes through the gate circuit, the gate circuit interrupts the first control signal and causes the second control signal to pass through the gate circuit as an absolute value of an instantaneous value of an AC current decreases below a threshold current.
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