摘要:
A regulator rectifier device and a method for regulating an output voltage of the same which takes input from three phase alternating current voltage generating device with each phase including a positive cycle and a negative cycle. A first rectifying unit with a first gate terminal, connected to the generating device to rectify the positive cycle of said three phase alternating current voltage. A second rectifying unit with a second gate terminal, connected to said generating device to rectify the negative cycle of said three phase alternating current voltage, wherein said second rectifying unit switches between rectification mode and shunt mode depending on the load condition. And a controlling unit configured to control said second rectifying unit by a gate control signal, said controlling unit outputs said gate control signal based on an output voltage of said regulator rectifier device with respect to a first predefined voltage in battery connected condition or third predefined voltage in battery-less condition and said positive cycle and said negative cycle of each phase of said three phase alternating current voltage from said generating device, said gate control signal enables said second rectifying unit to switch between rectification mode and shunt mode by controlling the second gate terminal of said second rectifying unit, wherein said gate control signal switches said second rectifying unit into shunt mode when the output voltage of said regulator rectifier device is greater than said first predefined voltage in battery connected condition or third predefined voltage in battery-less condition and thereby continuing the shunting of said second rectifying unit as long as said positive cycle of corresponding phase of said three phase alternating current voltage exists.
摘要:
The present invention provides a synchronous rectification converter circuit, including three transformer secondary inductors, a current transformer, a controller, three groups of diodes, and a resistor, where the current transformer includes three primary inductors and three secondary inductors; the three groups of diodes are connected in parallel at two ends of the resistor; the three transformer secondary inductors and the three primary inductors are alternately connected in series to form a first triangular structure; three vertices of the first triangular structure are respectively connected to switch components in a synchronous rectification circuit; the three secondary inductors are connected in series to form a second triangular structure; three vertices of the second triangular structure are respectively connected to the three groups of diodes; an end that is connected to a corresponding node and of each secondary inductor has a same polarity as an end that is connected to a corresponding node and of a corresponding transformer secondary inductor; and the controller controls the on-off state of a switch component by sampling a voltage of a diode. The present invention achieves a purpose of precisely controlling the on-off state of the synchronous rectification circuit.
摘要:
A high-frequency isolation alternating/direct current conversion circuit and a control method thereof are disclosed. The conversion circuit includes an alternating current source (V1), a direct current source (V2), a direct current side synchronous switch (400), high-frequency isolation transformers (TRA, TRB), direct current side high-frequency inverter bridges (100, 200), resonant inductors (L2, L3, Lr), resonant capacitors (C3, Cr), a high-voltage energy storage filter (C), an AC-side inverter bridge, and an output filter (C2). Using a preset DC-side voltage as baseline, a circuit is switched between two operating modes of rectification and inversion according to an external voltage reference and by different open operating modes of the inverter bridge, and achieving soft switching by a resonant mode of a high-frequency inverter bridge topology, thereby reducing switching loss, facilitating an increase of operating frequency or an increase in efficiency of an inverter circuit, thus increasing power density and reducing volume. DC voltage inversion in a wide range is achieved by open timing control of the high-frequency inverter bridge, thus obtaining high efficiency in applications with wide voltage variation ranges such as batteries, etc.
摘要:
A power inverter, such as a synchronous buck power inverter, that is configured with a high frequency switching control having a (PWM) controller and sensing circuit. Controller provides a low frequency oscillating wave to effect switching control on a synchronous-buck circuit portion that includes a plurality of switches to invert every half cycle of the frequency provided by controller. The inverting process thus creates a positive and negative transition of the oscillating wave signal. A low frequency switching stage includes a further plurality of switches configured to operate as zero voltage switching (ZVS) and zero current switching (ZCS) drives Charge on an output capacitor is discharged to zero on every zero crossing of low frequency switching stage and advantageously discharges energy every half cycle. During this discharge of energy, the zero crossing distortion in the low frequency sine wave is greatly reduced.
摘要:
A wireless power receiver IC in which the power path can be reconfigured as either a low-dropout regulator (LDO), a switched-mode power supply (SMPS) or a power switch (PSW) is provided. All three modes share the same pass device to reduce die area and share the same output terminal to reduce pin. In an inductive wireless receiver, the power path can be reprogrammed on the fly to LDO or PSW mode or can be reprogrammed on the fly to SMPS or PSW mode. In a resonant or multi-mode wireless receiver, the power path can be reprogrammed on the fly to SMPS or PSW mode. Furthermore, to achieve high power transfer efficiency performance, using N-channel MOSFET as its pass device has better efficiency and smaller die area than P-channel MOSFET pass device.
摘要:
A synchronization detection PLL section (13) generates an ON synchronized signal formed as a result of synchronization control based on a diode ON synthesized signal. The synchronization detection PLL section (13) also generates an OFF synchronized signal formed as a result of synchronization control based on a diode OFF synthesized signal. A stator gate instruction generator PWM section (15, 15') generates a gate instruction signal for controlling the switching of a switching element (31, 33, 35, 37, 39, 311) on the basis of the ON synchronized signal and the OFF synchronized signal.
摘要:
A power converter includes a power converter section (4) (e.g., an inverter circuit) having a plurality of switching elements (S p , S n ) in which a current can flow in a reverse direction, and a control section (10) which determines on-state time of each of the switching elements (S p , S n ) according to an output voltage of the power converter section (4), thereby switching on/off states of the switching elements (S p , S n ). The control section (10) instructs the power converter section (4) to perform synchronous rectification, and corrects the on-state time according to a drop of an on-state voltage of each of the switching elements (S p , S n ).
摘要:
A synchronization detection PLL section (13) generates an ON synchronized signal formed as a result of synchronization control based on a diode ON synthesized signal. The synchronization detection PLL section (13) also generates an OFF synchronized signal formed as a result of synchronization control based on a diode OFF synthesized signal. A stator gate instruction generator PWM section (15, 15') generates a gate instruction signal for controlling the switching of a switching element (31, 33, 35, 37, 39, 311) on the basis of the ON synchronized signal and the OFF synchronized signal.