5 results about "Cross regulation" patented technology

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.

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.

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.