11 results about "Cross regulation" patented technology

The application discloses a multi-path weak coupling wide voltage output DC-DC converter based on zero voltage switching, which comprises a direct current input power supply V in and N output branches, wherein N is a positive integer and N is greater than or equal to 2; the multi-path weak coupling wide voltage output DC-DC converter can realize good cross regulation among output ports by using a small number of elements, can realize both step-up output and step-down output, can meet different voltage demands, has a wide output voltage range, is easy to realize zero voltage switching, and thus can ensure high system efficiency; the multi-path output voltages can be respectively adjusted by independent control variables, and the cross coupling effect among the multiple output ports is effectively reduced.

The present application relates to the field of switching power supply with multiple output, disclose a flyback type multi-output converter and its control method, converter at least includes: transformer, and the first output circuit and the first switch control circuit which are composed of the first output winding of transformer secondary side, first switch, first output filter capacitor, wherein, the first switch is arranged between the first output winding and the first output filter capacitor, and under the control of the first switch control circuit, the energy of the first output filter capacitor can be flowed back to the first output winding, and finally supplemented to the second output winding. The flyback type multi-output converter and its control method provided by the present application can effectively improve the output voltage precision of the second to the K output circuit, and obviously improve the cross regulation rate of the converter when carrying unbalanced load.

The invention discloses a flyback switching power supply and a cross regulation rate control method and circuit thereof, and belongs to the technical field of switching power supplies, the switching power supply comprises at least one main path output and one auxiliary path output, and the method comprises the following steps: detecting a first load state of the main path output and a second load state of the auxiliary path output; according to the first load state and the second load state, dynamically controlling the connection and disconnection of a controllable dummy load circuit connected in parallel with the main circuit output; and when the first load state represents that the main circuit is in a light-load or no-load state and the second load state represents that the auxiliary circuit is in a heavy-load state, controlling the controllable dummy load circuit to access the main circuit for output. The dummy load is dynamically connected to the main path, so that the cross adjustment rate of the multi-path flyback power supply is effectively improved when the main path is in light load and the auxiliary path is in heavy load, and the multi-path flyback power supply has low power consumption and high stability.

The application discloses a series battery pack active equalization circuit based on a Zeta converter, which comprises an n-way output Zeta converter, n cross connection capacitors and n battery units; the n-way output Zeta converter comprises an inductor L, a power switch S and a first-way output diode D1, a first-way output capacitor C1, a first-way cross connection capacitor C p1 , a first-way clamping diode D p1 ; a second-way output diode D2, a second-way output capacitor C2, a second-way cross connection capacitor C p2 , a second-way clamping diode D p2 ; a third-way output diode D3, a third-way output capacitor C3, a third-way cross connection capacitor C p3 , a third-way clamping diode D p3 ; and a fourth-way output diode D n , a fourth-way output capacitor C n , a fourth-way cross connection capacitor C pn , a fourth-way clamping diode D pn . The application realizes automatic voltage equalization among the battery units through the cross connection capacitors, does not need complex sampling and control algorithms, avoids the end voltage imbalance problem caused by the cross regulation ratio of a transformer in a multi-winding output, effectively reduces voltage deviation and improves battery equalization precision.

This invention provides a three-port converter and a three-port power conversion system, relating to the field of circuit technology. The converter can bidirectionally transfer power between three ports, each of which can operate as a power source or load. It includes a primary-side switching network at the first port for driving a transformer, and secondary-side resonant tank circuits at the second and third ports. The converter achieves electrical isolation and provides voltage gain. The system includes a controller configured to monitor the voltage and power at each port and generate gate drive signals to regulate power transfer between the input port and at least one output port via switching frequency control. A cross-regulation function allows the voltage at one port to be fine-tuned to a target value while maintaining the voltage at another port at a substantially constant state. The converter can employ a variant design of a multiphase transformer to distribute conduction losses and thermal stress, and improve power handling capacity.

The application discloses a lithium ion battery pack SOC active equalization circuit based on a half-bridge, which comprises an n-winding output half-bridge converter, n-1 cross-connection capacitors and n lithium ion batteries. in1 in2 m n n Compared with a traditional multi-winding transformer equalization structure, the active equalization circuit only uses two switches to realize the equalization of the lithium ion battery pack, reduces the control difficulty and cost of the circuit, avoids the end voltage imbalance problem caused by the cross regulation rate of the transformer in the multi-winding output, effectively reduces the voltage deviation and improves the battery equalization precision.​​​​

An apparatus for a single-inductor multiple-output (SIMO) power converter with a cross-regulation switch is disclosed. An example apparatus includes a power source and a SIMO power converter. The SIMO power converter includes an input node coupled to the power source, a first node, a second node, a ground node, and an inductor coupled between the first node and the second node. The single-inductor multiple-output power converter also includes a first switch coupled between the input node and the first node, a second switch coupled between the first node and the ground node, and a cross-regulation switch coupled between the input node and the second node.

A bipolar output cross regulation improvement circuit, the circuit comprises a bipolar output double-tube flyback converter, a cross regulation capacitor C p The bipolar output double-tube flyback converter comprises a DC input source u in , a power switch S1, a power switch S2, an excitation inductor L m , a transformer T, a clamping diode D 1p , a clamping diode D 2p , a diode D1, a diode D2, an output capacitor C 1, an output capacitor C 2; compared with the traditional bipolar output double-tube flyback converter, the present application can realize the improvement of cross regulation by only adding a cross regulation capacitor, without using a complex sampling and control algorithm, the implementation is simple, and the control and driving mode of the original circuit is not affected, the problem of uneven energy distribution caused by load disturbance is solved, the self-voltage balancing effect of the bipolar output circuit is realized, the voltage deviation is reduced, and it is suitable for occasions requiring bipolar voltage power supply.

A series battery pack active balancing circuit, comprising n-way output double-tube flyback converter, n-1 cross-over capacitor, n lithium ion battery; n-way output double-tube flyback converter comprises: a power switch S1, power switch S2, excitation inductance L m , n-way output transformer T, clamping diode D 1p , clamping diode D 2p ; first output diode D1, second output diode D2,..., n-way output diode D n ; first output capacitor C 1, second output capacitor C 2,..., n-way output capacitor C n Compared with the traditional multi-winding transformer balancing structure, the present application realizes the automatic voltage balancing between battery units through the cross-over capacitor, without the need for complex sampling and control algorithm, and avoids the end voltage imbalance problem caused by the cross regulation ratio of the transformer in the multi-winding output, effectively reduces the voltage deviation, and improves the battery balancing accuracy.

The invention relates to a voltage stabilizer self-adaptive zero-crossing adjusting system which comprises a transformer and an input relay which are connected in series to an alternating current input circuit, and the input relay is connected with a micro-control unit. The switching-on response time t0 of the input relay is measured in advance, a period of a voltage oscillogram is set as T, when a regulating circuit of the voltage stabilizer is switched on, the micro-control unit records waveform information of the front end of the input relay, the oscillogram timing sequence time T0 when the regulating circuit of the voltage stabilizer is switched on is set, and the period of the voltage oscillogram is set as T; the starting delay time of the input relay is set to be delta t, T0 + t0 + delta t = N * T / 2, and N is a natural number. According to the self-adaptive zero-crossing adjusting system of the voltage stabilizer, by setting oscillogram time sequence T0 when an adjusting circuit of the voltage stabilizer is switched on, the switching-on response time t0 of an input relay is measured in advance, and the starting delay time delta t of the input relay is set; when the voltage stabilizer is connected to the circuit, the contact point of the input relay is at the zero-crossing time point as long as the voltage stabilizer is started by delaying the time of delta t.

Aiming at a power conversion device, namely a front-stage proportional converter, through a winding mode of a transformer winding, the requirement that the ratio of input voltage to output voltage is 5: 1 or even 8: 1 can be met, and through optimizing the winding mode of the transformer winding and the layout of a power device, the loss is reduced, and the size is reduced. Furthermore, the invention provides an auxiliary power supply device which not only can satisfy the cross regulation rate among multiple paths of output voltages of an auxiliary power supply circuit, but also can improve the accuracy of the input voltage detected at the output side in the application that the voltage difference between the input voltage of the power conversion device and the auxiliary power supply output voltage is large.