A dual output dc-dc converter for electric motorcycles

Abstract

The utility model discloses a kind of double-output DC-DC converters for electric motorcycle, including input circuit, isolation transformer, enable control circuit, delay control circuit, first protection circuit and second protection circuit, input circuit is connected with the primary winding of isolation transformer, a group of output windings of isolation transformer is connected with enable control circuit, another group of output windings is connected with delay control circuit, the output end of enable control circuit is connected with first protection circuit, the output end of delay control circuit is connected with second protection circuit.The scheme realizes the effect of isolated single-path input, double-path output;While double-path uses different control mode to output, double-path can realize independent control, in addition, one of them When failure occurs, it will not affect the other, realize the effect of double-path failure mutual non-influence output.The scheme controls output voltage by different output loop, to better satisfy different loop different time, different requirement effect.

Description

TECHNICAL FIELD

[0001] The utility model relates to electric motorcycle technical field, concretely relates to a double output DC-DC converter for electric motorcycle. BACKGROUND

[0002] The DC-DC converter in electric motorcycle is a device that converts high-voltage direct current of battery into low-voltage direct current for various electronic devices on motorcycle, such as sensor, lighting system, instrument, etc.

[0003] The DC-DC converter is based on switching power supply technology, and through controlling the conduction and shutdown of switching tube, the input direct current voltage is chopped into high-frequency alternating current voltage, and then through transformer or direct conversion, the required direct current voltage output is obtained.

[0004] At present, the DC-DC converter used on electric motorcycle on market mainly has isolated single-path control output mode and isolated double-path control output mode, wherein the isolated single-path control output mode can only realize single-path voltage output; and the isolated double-path control output mode can realize double-path output, but the double-path output cannot be completely independently controlled, and when one of the outputs appears short circuit fault, the output of another path will be affected. UTILITY MODEL CONTENTS

[0005] In view of the above deficiencies in prior art, the utility model solves the technical problem of how to provide a double output DC-DC converter for electric motorcycle, which can not only realize double-path output, but also the fault of one of the outputs will not affect the output of another path.

[0006] In order to solve the above technical problem, the utility model adopts the following technical scheme:

[0007] A double output DC-DC converter for electric motorcycle, comprising an input circuit, an isolation transformer, an enable control circuit, a delay control circuit, a first protection circuit and a second protection circuit, the input end of the input circuit is used for connecting with direct current input voltage, the output end of the input circuit is connected with the primary winding of the isolation transformer, the secondary side of the transformer has two groups of output windings, one group of output windings of the isolation transformer is connected with the input end of the enable control circuit, the other group of output windings of the isolation transformer is connected with the input end of the delay control circuit, the output end of the enable control circuit is connected with the input end of the first protection circuit, the enable end of the enable control circuit is used for inputting enable signal, the output end of the delay control circuit is connected with the input end of the second protection circuit, the output end of the first protection circuit is used for outputting first direct current voltage, and the output end of the second protection circuit is used for outputting second direct current voltage.

[0008] Preferably, the enable end of the enable control circuit is used for inputting an enable voltage, and the enable control circuit is turned on when the enable voltage value is greater than a set voltage value.

[0009] Preferably, the input end voltage of the delay control circuit reaches a set value and is turned on after a delay of a set time.

[0010] Preferably, the set time of the delay control circuit is 5-10s.

[0011] Compared with the prior art DC-DC converter, the DC-DC converter of the present scheme adopts two groups of output windings on the secondary side of the isolation transformer, one group of output windings is connected with the enable control circuit, and the other group of output windings is connected with the delay control circuit. The enable control circuit controls the output in the form of an enable signal, and only when the enable voltage of the enable end is greater than the set value, the enable control circuit can be turned on and output a signal to the first protection circuit. The first protection circuit outputs a first direct current voltage after judging that there is no fault. The delay control circuit controls the output in the form of delay, and starts timing after the input end voltage of the delay control circuit reaches a set value. When the delay reaches a set time, the delay control circuit is turned on and outputs a signal to the second protection circuit. The second protection circuit outputs a second direct current voltage after judging that there is no fault. In addition, when a short circuit fault occurs outside the output end of the first protection circuit, the first protection circuit will enter a protection state and be disconnected. At this time, the second protection circuit can normally output. Similarly, when a short circuit fault occurs outside the output end of the second protection circuit, the second protection circuit will enter a protection state and be disconnected. At this time, the first protection circuit can normally output. Thus, the present scheme realizes the effect of isolated single-input and double-output. At the same time, the double circuits output in different control modes, and the double circuits can realize independent control. In addition, when one of the circuits fails, it will not affect the other circuit, realizing the effect of double-circuit fault independent output. The present scheme controls the output voltage through different output circuits, so as to better meet the requirements of different circuits, different times and different requirements. BRIEF DESCRIPTION OF DRAWINGS

[0012] ATTACH Figure 1 The system block diagram of the double-output DC-DC converter for the electric motorcycle. DETAILED DESCRIPTION

[0013] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme of the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are some embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of the present application.

[0014] It should be noted that: similar reference numerals and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. In the description of the present application, it should be explained that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly placed when the product of the present application is used, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" and the like are only used for differentiation in description, and cannot be understood as indicating or implying relative importance. In addition, the terms "horizontal", "vertical" and the like do not mean that the components must be absolutely horizontal or hanging, but can be slightly inclined. For example, "horizontal" only means that its direction is relatively more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined. In the description of the present application, it should also be explained that unless otherwise explicitly specified and limited, the terms "arrangement", "installation", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or detachably connected, or integrally connected; it can be mechanically connected, or electrically connected; it can be directly connected, or indirectly connected through an intermediate medium, or the communication inside two elements. For those of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0015] As shown in the accompanying Figure 1As shown, a kind of double-output DC-DC converter for electric motorcycle includes input circuit, isolation transformer, enable control circuit, delay control circuit, first protection circuit and second protection circuit, the input end of the input circuit is used to connect with DC input voltage, the output end of the input circuit is connected with the primary winding of the isolation transformer, the secondary side of the isolation transformer has two groups of output windings, one group of output windings of the isolation transformer is connected with the input end of the enable control circuit, another group of output windings of the isolation transformer is connected with the input end of the delay control circuit, the output end of the enable control circuit is connected with the input end of the first protection circuit, the enable end of the enable control circuit is used to input enable signal, the output end of the delay control circuit is connected with the input end of the second protection circuit, the output end of the first protection circuit is used to output first DC voltage (output 1+, output 1-), the output end of the second protection circuit is used to output second DC voltage (output 2+, output 2-).

[0016] Specifically, the enable end of the enable control circuit is used to input enable voltage, and the enable control circuit is turned on when the enable voltage value is greater than the set voltage value.

[0017] Specifically, the input end voltage of the delay control circuit reaches the set value and is turned on after the set time delay. The delay time can be set according to the needs, and in the specific embodiment, the set time delay of the delay control circuit is 5-10s.

[0018] Compared with the DC-DC converter in the prior art, the DC-DC converter of the scheme adopts two groups of output windings on the secondary side of the isolation transformer, one group of output windings is connected with the enable control circuit, and the other group of output windings is connected with the delay control circuit, the enable control circuit controls the output in the form of an enable signal, and only when the enable voltage of the enable end is greater than the set value, the enable control circuit can be turned on and output a signal to the first protection circuit, and the first protection circuit outputs a first direct current voltage after judging that there is no fault; and the delay control circuit controls the output in the form of delay, when the input voltage of the delay control circuit reaches the set value, the delay control circuit starts to count time, and when the delay reaches the set time, the delay control circuit is turned on and outputs a signal to the second protection circuit, and the second protection circuit outputs a second direct current voltage after judging that there is no fault. In addition, when a short circuit fault occurs at the output end of the first protection circuit, the first protection circuit will enter the protection state and be disconnected, at this time the second protection circuit can normally output, similarly, when a short circuit fault occurs at the output end of the second protection circuit, the second protection circuit will enter the protection state and be disconnected, at this time the first protection circuit can normally output. Thus, the scheme realizes the effect of isolated single-input and double-output, and the double circuits output in different control modes, the double circuits can realize independent control, and in addition, when a fault occurs in one of the circuits, it will not affect the other circuit, realizing the effect of double-circuit fault independent output. The scheme controls the output voltage through different output circuits, so as to better meet the requirements of different circuits, different time and different requirements.

[0019] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application and not to limit the technical solutions, and those skilled in the art should understand that those who modify or equivalently replace the technical solutions of the present application without departing from the purpose and scope of the technical solutions should be covered in the scope of the claims of the present application.

Claims

1. A dual output DC-DC converter for an electric motorcycle, characterized by, The input circuit, isolation transformer, enable control circuit, delay control circuit, first protection circuit and second protection circuit, the input end of the input circuit is connected with the DC input voltage, the output end of the input circuit is connected with the primary winding of the isolation transformer, the secondary winding of the isolation transformer has two groups of output windings, one group of output windings of the isolation transformer is connected with the input end of the enable control circuit, the other group of output windings of the isolation transformer is connected with the input end of the delay control circuit, the output end of the enable control circuit is connected with the input end of the first protection circuit, the enable end of the enable control circuit is used for inputting the enable signal, the output end of the delay control circuit is connected with the input end of the second protection circuit, the output end of the first protection circuit is used for outputting the first DC voltage, the output end of the second protection circuit is used for outputting the second DC voltage.

2. The dual output DC-DC converter for an electric motorcycle according to claim 1, characterized by, The enable end of the enable control circuit is used for inputting the enable voltage, and the enable control circuit is turned on when the enable voltage value is greater than the set voltage value.

3. The dual output DC-DC converter for an electric motorcycle according to claim 1, characterized by, The input end voltage of the delay control circuit reaches the set value and is turned on after the set time delay.

4. The dual output DC-DC converter for an electric motorcycle according to claim 3, characterized by, The set time of the delay control circuit is 5-10s.

Images