4results about How to "Extended output voltage range" patented technology

The invention relates to a boost driving circuit, and relates to the technical field of voltage conversion. In the boost driving circuit, a first power supply is connected with a driving chip and is used for supplying power to the driving chip; a first switch tube and a second switch tube are integrated in the driving chip, and the driving chip is used for controlling the on and off of the first switch tube and the second switch tube; the second power supply is connected with the primary side push-pull circuit and is used for inputting direct current voltage to the primary side push-pull circuit; one end of the primary side push-pull circuit is connected with the first switch tube, the other end is connected with the second switch tube, and the primary side push-pull circuit is used for converting direct-current voltage into alternating-current voltage and boosting the alternating-current voltage; and the secondary rectification circuit is connected with the primary push-pull circuit and is used for carrying out rectification processing on the boosted AC voltage and outputting a target DC voltage. According to the boost driving circuit, the output voltage range is expanded, the efficiency of the transformer is improved, and the working efficiency of the boost driving circuit is improved while the number of turns of the transformer is reduced, the size of the transformer is reduced and the cost of the transformer is reduced.

The embodiment of the invention provides a charging device and an electric vehicle. The charging device comprises a primary side bridge arm module, a primary side switching module, a transformer module, a secondary side switching module, a secondary side bridge arm module and a control module. The transformer module comprises a first transformer, a second transformer and a third transformer; the control module is used for controlling the switching state of the change-over switch in the primary side switching module and the switching state of the change-over switch in the secondary side switching module under the condition that the input end of the primary side bridge arm module inputs voltage, so that the primary side switching module and the secondary side switching module are in different connection structures; wherein under the condition that the primary side switching module and the secondary side switching module are in different connection structures, the ranges of the output voltage of the output end of the secondary side bridge arm module are different. According to the embodiment of the invention, the output voltage range of the charging device can be widened.

The utility model discloses a kind of stable voltage high-efficiency switching power supply circuit, it is related to switching power supply technical field, including drive module, drive first conversion module to the direct current electric energy of power module access carries out high-frequency isolation voltage transformation and rectification filtering processing, provides stable voltage for output module, by protection control module when detecting that first conversion module appears over temperature, will control second conversion module instead of first conversion module and carry out high-frequency isolation voltage transformation and rectification filtering processing, when required stable voltage is greater than the maximum stable voltage that first conversion module can provide, output detection module will control second conversion module and carry out secondary isolation voltage transformation processing to the electric energy that first conversion module isolation voltage transformation output, again rectification filtering processing is carried out.The utility model stable voltage high-efficiency switching power supply circuit can maintain stable voltage output, and avoid first conversion module damage, can also improve output stable voltage value, improve output voltage range.

The invention discloses a switching power supply circuit for electrical nerve stimulation, and the circuit comprises a power switch module which is used for controlling an input voltage to periodically charge and discharge an output capacitor, so as to form a first output voltage; the PWM control module is used for sampling the first output voltage and generating a PWM control signal according to a comparison result of a sampling value and a reference voltage; and the power tube driving module is used for driving a power switch according to the PWM control signal so as to obtain a second output voltage for nerve electrical stimulation. The circuit provided by the invention is an electrical stimulation circuit capable of realizing constant-voltage and constant-current stimulation, and also capable of realizing positive-voltage and negative-voltage stimulation with the same electric charge quantity, so that the problem of charge balance is solved; meanwhile, the problems existing during high-impedance electrode stimulation and the problem that the duty ratio of switching power supply PWM control is too small can be solved.