WO2018120908A1 - 一种用于可发电健身单车的无线稳压限流电路 - Google Patents

一种用于可发电健身单车的无线稳压限流电路 Download PDF

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WO2018120908A1
WO2018120908A1 PCT/CN2017/101010 CN2017101010W WO2018120908A1 WO 2018120908 A1 WO2018120908 A1 WO 2018120908A1 CN 2017101010 W CN2017101010 W CN 2017101010W WO 2018120908 A1 WO2018120908 A1 WO 2018120908A1
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voltage
current
control chip
resistor
pin
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PCT/CN2017/101010
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English (en)
French (fr)
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冼宇俊
高先德
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珠海奥释科技有限公司
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Publication of WO2018120908A1 publication Critical patent/WO2018120908A1/zh

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    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
    • G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
    • G05F1/10—Regulating voltage or current
    • G05F1/46—Regulating voltage or current wherein the variable actually regulated by the final control device is dc
    • G05F1/56—Regulating voltage or current wherein the variable actually regulated by the final control device is dc using semiconductor devices in series with the load as final control devices

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  • the utility model belongs to the technical field of remote control current limiting, in particular to a wireless voltage limiting current limiting circuit for a power generation fitness bicycle.
  • the weight of the fitness equipment is mechanically controlled, and the function of remote control cannot be completed due to mechanical control. This makes most fitness exercises have to be adjusted by the individual's weight. It is impossible to have remote control by the coach. Individual athletes have low fitness professionalism and cannot effectively exercise and exercise accurately. The resulting injuries and bad exercise habits are significant for health injuries. Therefore, based on the new electric load, the introduction of remote current limiting technology can enable professional sports instructors to remotely control the weight of various sports equipment and the energy consumption of the athletes. It is of great significance for intelligent sports, professional sports and prevention of sports injuries.
  • the purpose of the utility model is to provide a wireless voltage limiting current limiting circuit for a power generation fitness bicycle.
  • the wireless voltage limiting current limiting circuit used for the power generation fitness bicycle adopts a voltage regulator, a single chip microcomputer and a wireless transmission parallel technology.
  • the program acquires the current value and voltage value of the regulated output through the on-chip analog-to-digital converter of the single-chip microcomputer and its peripheral circuit.
  • the single-chip microcomputer adjusts the working state of the voltage-stabilizing chip to realize the voltage regulation.
  • the wireless system can receive the current limit data sent by the wireless control terminal, transmit it to the MCU in time, and update the limiting current condition, thereby realizing the output current limit of the voltage regulator and the wireless transmission limiting current parameter.
  • the utility model provides a wireless voltage limiting current limiting circuit for a power generation exercise bicycle, comprising: a power source, a first control chip U1, a second control chip U2, a first resistor R1, and a second The resistor R2, the third resistor R3, the transistor VT1, the current collecting network P1, the voltage collecting network P2, and the wireless transmission network P3; the first leg of the first control chip U1 is connected to the input power source, and the second leg is connected to the first resistor.
  • the second resistor R2 and the collector of the transistor VT1 are connected to the 1st pin via the first resistor R1, and grounded via the second resistor R2; the 4th pin of the first control chip U1 is connected to the collector of the transistor VT1, 20
  • the pin is directly connected to the IP+ pin of the current collecting network P1, and the IP-pole of the current collecting network P1 is directly connected to the output terminal; the 7-pin and the 9-pin in the second control chip U2 are respectively connected to the ground and the power supply
  • the 13th pin of the second control chip U2 is connected in series with the third resistor R3 and is connected to the base of the transistor VT1; the emitter of the tertiary tube VT1 is directly connected to the ground; and the second control chip U2 is 14 and 15 , 16, 17 feet respectively connected to the wireless transmission network P3; the second control chip U
  • the 19th pin of 2 is connected to the VOUT end of the voltage acquisition network P2, and the 20th pin is connected to the VOUT of the current collecting
  • the first resistor R1 is connected in parallel between the 2 and 4 legs of the first control chip U1.
  • one side of the second resistor R2 is connected to the 2 pin and the 4 pin of the first control chip U1, and the other side is grounded.
  • one side of the third resistor R3 is connected to the 13th leg of the second control chip U2, and the other side is connected to the base of the transistor VT1.
  • the base of the transistor VT1 is connected to the side of the second resistor R2, and the collector is connected to the 2nd and 4th pins of the first control chip U1, and the emitter is connected to the ground.
  • the IP+ pin of the current collecting network P1 is connected to the 20 pin of the first control chip U1
  • the IP-pin is connected to the output of the entire circuit
  • the VOUT pin is connected to the 20 pin of the second control chip U2.
  • the VIN pin of the voltage acquisition network P2 is connected to the output of the entire circuit, and the VOUT pin is connected to the 19 pin of the second control chip U2.
  • the working principle of the wireless voltage limiting current limiting circuit used for the power generation exercise bicycle is:
  • This circuit is composed of a current mode synchronous buck controller U1 for wide voltage input and its peripheral circuits, a programmable microcontroller controller U2 with SPI and AD acquisition peripherals, two resistors, a triode, a wireless transmission network, and a current.
  • Wide voltage step-down regulator wireless current limiting circuit composed of voltage acquisition network.
  • the first resistor R1 and the second resistor R2 form a voltage dividing circuit, and the other end of the A1 node is connected to the collector of the third-stage tube VT1.
  • the third-stage tube operates in an off state, so A1 The node is divided by resistor to obtain a decision level for enabling the chip to work, so that the first control chip U1 starts to work, and the circuit output terminal VOUT outputs the regulated voltage.
  • the voltage collecting network P2 connected to the output end of the circuit and the current collecting network P1 connected in series at the output end of the 20-pin of the first control chip U1 convert the current and voltage outputted by the collected circuit into a suitable voltage value and send it to the second control chip of the single chip microcomputer.
  • U2's 19-pin and 20-pin enable the second control chip U2 to collect the current and voltage parameters of the regulated output.
  • the control chip has been programmed in advance, including the initial current limiting condition, and the corresponding current value input by the current collecting network P1 is compared.
  • the second control chip when the voltage acquisition network P2 input acquisition voltage value reaches a preset value, and the current corresponding to the acquisition voltage input by the current acquisition network P1 exceeds the current limit value preset by the control chip, the second control chip
  • the 13-pin of U2 will send a high-frequency control signal, and the third resistor R3 is connected with the base of the transistor VT1, so that the triode VT1 operates in the high-frequency switching state, and the collector level of the VT1 changes rapidly, causing the first control chip U1 to work.
  • the pressure collection network P1 and P2 send the collected current voltage data to the second control chip U2 to continuously cycle and judge and send corresponding control signals to achieve the purpose of limiting the current.
  • the 14th, 15th, 16th and 17th legs of the second control chip U2 are connected to the wireless transmission network P3 through the SPI or the serial port, and the controller end wirelessly transmits the limited current value and related data to the second control of the single chip microcomputer system via the wireless transmission network.
  • the update covers its initial current limit value.
  • the utility model provides a wireless voltage limiting current limiting circuit for a power generating exercise bicycle, which has the beneficial effects that compared with the prior art, the current limiting current can only limit the fixed current, through a simple acquisition.
  • the system by modifying the hardware-related parameters, can determine the current magnitude and the fixed upper limit value to achieve a fixed current limit; or access the specific current limit circuit through the stable back end, and realize the current limit by adjusting the adjustable resistor on the circuit the goal of.
  • the wireless current limiting technology described by the invention adopts a scheme of a voltage regulator plus a single chip microcomputer and a wireless transmission, and collects a current value and a voltage value of the regulated output through an on-chip analog-to-digital converter of the single chip microcomputer and a peripheral circuit thereof, when the voltage is regulated.
  • the voltage is constant and the current reaches the limit condition.
  • the MCU can control the output of the voltage regulator by adjusting the working state of the voltage regulator chip.
  • the wireless system can receive the current limit data sent by the wireless control terminal, and transmit it to the MCU in time to update the current limit. Conditions, thus achieving the regulator's output current limit and wireless transmission limit current parameters.
  • the problem that the current limiting circuit current limit value is not adjustable and the current limit value cannot be adjusted remotely is solved.
  • Figure 1 is a schematic diagram of the circuit principle of the present invention.
  • Embodiment A wireless voltage limiting current limiting circuit for a power generation exercise bicycle.
  • the voltage regulator current limiter usually uses the single-chip microcomputer system and its peripheral circuits for data acquisition.
  • the single-chip microcomputer judges whether the data exceeds the limit condition. When the limit condition is exceeded, the single-chip microcomputer controls the voltage stabilization circuit to close.
  • the single-chip microcomputer SPI communicates with the wireless circuit and the controller, and the wireless controller forms a control module through the single-chip microcomputer and the simple circuit, and is used for setting the current limit value of the voltage-regulated current limiting system.
  • a wireless voltage limiting current limiting circuit for a power generation exercise bicycle includes: a power source, a first control core a chip U1, a second control chip U2, a first resistor R1, a second resistor R2, a third resistor R3, a transistor VT1, a current collecting network P1, a voltage collecting network P2, and a wireless transmission network P3; the first control chip U1 The 1 pin is connected to the input power source, and the 2 pin is connected to the first resistor R1, the second resistor R2 and the collector of the transistor VT1, and is connected to the 1st pin via the first resistor R1, and is grounded via the second resistor R2; A 4-pin of the control chip U1 is connected to the collector of the triode VT1, and the 20-pin is directly connected to the IP+ pin of the current collecting network P1, and the IP-pole of the current collecting network P1 is directly connected to the output terminal; the second control The 7-pin and the 9-pin of the chip U2 are respectively connected to the ground
  • the first resistor R1 is connected in parallel between the 2 pin and the 4 pin of the first control chip U1; one side of the second resistor R2 is connected to the 2 pin of the first control chip U1 and 4 feet, the other side is grounded; one side of the third resistor R3 is connected to the 13th leg of the second control chip U2, the other side is connected to the base of the transistor VT1; the base of the transistor VT1 and the The two resistors R2 are connected to one side, the collector is connected to the 2nd and 4th pins of the first control chip U1, and the emitter is connected to the ground; the IP+ pin of the current collecting network P1 is connected to the 20th leg of the first control chip U1.
  • the IP-pin is connected to the output of the entire circuit, and the VOUT pin is connected to the 20-pin of the second control chip U2; the VIN pin of the voltage acquisition network P2 is connected to the output of the entire circuit, and the VOUT pin and the second control chip U2 19 The feet are connected.
  • the wireless voltage limiting current limiting circuit used for the power generation fitness bicycle is a current mode synchronous step-down controller U1 for wide voltage input and Its peripheral circuit (slight in Figure 1), programmable microcontroller controller U2 with SPI and AD acquisition peripherals, two resistors, a triode, wireless transmission network, current and voltage acquisition network composed of wide voltage step-down regulator wireless limit Stream circuit.
  • the first resistor R1 and the second resistor R2 form a voltage dividing circuit, and the other end of the A1 node is connected to the collector of the third-stage tube VT1.
  • the third-stage tube operates in an off state, so A1 The node is divided by resistor to obtain a decision level for enabling the chip to work, so that the first control chip U1 starts to work, and the circuit output terminal VOUT outputs the regulated voltage.
  • the voltage collecting network P2 connected to the output end of the circuit and the current collecting network P1 connected in series at the output end of the 20-pin of the first control chip U1 convert the current and voltage outputted by the collected circuit into a suitable voltage value and send it to the second control chip of the single chip microcomputer.
  • U2's 19-pin and 20-pin enable the second control chip U2 to collect the current and voltage parameters of the regulated output.
  • the control chip has been programmed in advance, including the initial current limiting condition, and the corresponding current value input by the current collecting network P1 is compared.
  • the second control chip U2's 13 feet will be high
  • the frequency control signal is connected to the base of the transistor VT1 through the third resistor R3, so that the triode VT1 operates in the high frequency switching state, and the collector level of the VT1 changes rapidly, causing the first control chip U1 to operate in an enabled state and a disabled state. Therefore, the voltage stabilizing circuit continuously operates in the switching state, thereby suppressing the current climb.
  • the second control chip U2 When the voltage of the input voltage of the voltage collecting network P2 reaches a preset value, the current corresponding to the input voltage input by the current collecting network P1 does not reach the preset of the control chip. The upper limit of the current is determined, the second control chip U2 outputs a low level, and the voltage stabilizing circuit is normally enabled. Because the frequency of the high-frequency control signal of the second control chip U2 is relatively high, the switching frequency of the triode VT1 is extremely fast, and the voltage stabilizing circuit is equivalent to uninterrupted operation, and the current and voltage of the regulated output are collected by the collecting network P1 and P2. The second control chip U2 continuously loops and judges and sends a corresponding control signal to achieve the purpose of limiting the current.
  • the 14th, 15th, 16th and 17th legs of the second control chip U2 are connected to the wireless transmission network P3 through the SPI or the serial port, and the controller end (not shown) wirelessly transmits the limited current value and related data via the wireless transmission network.
  • the update covers its initial current limit value, and when the regulated output voltage and current is converted by the acquisition network and sent to the second control chip U2, the above process is repeated when the limit value is exceeded.

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Abstract

一种用于可发电健身单车的无线稳压限流电路，包括：电源、第一控制芯片（U1）、第二控制芯片（U2）、第一电阻（R1）、第二电阻（R2）、第三电阻（R3）、三极管（VT1）、电流采集网络（P1）、电压采集网络（P2）和无线传输网络（P3）。用于可发电健身单车的无线稳压限流电路采用了稳压器、单片机、无线传输并行的技术方案，通过单片机的片上模数转换器及其外围电路采集稳压输出的电流值及电压值，当稳压输出电压恒定，电流达到限制条件，单片机通过调整稳压芯片工作状态，实现对稳压器输出的控制，同时无线系统能够接收无线控制端发送过去的电流限制数据，及时传输到单片机上，更新限制电流条件，从而实现了稳压器的输出电流限制及无线传输限制电流参数。

Description

一种用于可发电健身单车的无线稳压限流电路 技术领域
本实用新型属于遥控限流技术领域，具体涉及一种用于可发电健身单车的无线稳压限流电路。
背景技术
在现有技术中，健身设备的负重通过机械控制，由于机械控制，无法完成远程操控的功能。这使得绝大部分健身运动必须由运动者个人对负重进行调节。而无法做到有教练远程控制。个人运动者的健身专业性较低的情况，无法有效做到正确运动、精确运动。由此产生的受伤和不良运动习惯对于健康伤害明显。因此在采用全新电负载的基础上，引入遥控限流技术，可以使得专业运动指导者可以远程控制各类运动设备的负重与运动者的能量消耗。对于智能运动、专业运动以及运动伤病预防有重大意义。
实用新型内容
本实用新型的目的是提供一种用于可发电健身单车的无线稳压限流电路，本用于可发电健身单车的无线稳压限流电路采用了稳压器、单片机、无线传输并行的技术方案，通过单片机的片上模数转换器及其外围电路采集稳压输出的电流值及电压值，当稳压输出电压恒定，电流达到限制条件，单片机通过调整稳压芯片工作状态，实现对稳压器输出的控制同时无线系统能够接收无线控制端发送过去的电流限制数据，及时传输到单片机上，更新限制电流条件，从而实现了稳压器的输出电流限制及无线传输限制电流参数。
为实现上述技术方案，本实用新型提供了一种用于可发电健身单车的无线稳压限流电路，包括：电源、第一控制芯片U1、第二控制芯片U2、第一电阻R1、第二电阻R2、第三电阻R3、三极管VT1、电流采集网络P1、电压采集网络P2和无线传输网络P3；所述第一控制芯片U1中的1脚与输入电源相接，2脚并接第一电阻R1、第二电阻R2和三极管VT1的集电极，经第一电阻R1并接在1脚，经第二电阻R2接地；所述第一控制芯片U1的4脚接入三极管VT1的集电极，20脚直接与电流采集网络P1的IP+引脚相接，电流采集网络P1的IP-极直接串接到输出端；所述第二控制芯片U2中的7脚和9脚分别与地和电源相接；所述第二控制芯片U2的13脚串接第三电阻R3后与三极管VT1的基极相接；三级管VT1的射极直接与地相连；所述第二控制芯片U2的14、15、16、17脚分别与无线传输网络P3相接；所述第二控制芯片U2的19脚与电压采集网络P2的VOUT端相接，20脚与电流采集网络P1的VOUT相接。
优选的，所述第一电阻R1并接在第一控制芯片U1的2脚和4脚之间。
优选的，所述第二电阻R2的一侧并接在第一控制芯片U1的2脚和4脚，另一侧接地。
优选的，所述第三电阻R3的一侧接在第二控制芯片U2的13脚，另一侧接在三极管VT1的基极。
优选的，所述所述三极管VT1的基极与第二电阻R2一侧相连，集电极并接在第一控制芯片U1的2脚和4脚，发射极与地相连。
优选的，所述电流采集网络P1的IP+脚与第一控制芯片U1的20脚相连，IP-脚与整个电路的输出相连，VOUT脚与第二控制芯片U2的20脚相连。
优选的，所述电压采集网络P2的VIN脚与整个电路的输出端相连，VOUT脚与第二控制芯片U2的19脚相连。
本用于可发电健身单车的无线稳压限流电路的工作原理是：
此电路是由用于宽电压输入的电流模式同步降压控制器U1及其外围电路、具有SPI和AD采集外设的可编程单片机控制器U2、两个电阻、一个三极管、无线传输网络、电流和电压采集网络组成的宽电压降压稳压无线限流电路。
当输入端VIN有电源输入，第一电阻R1和第二电阻R2组成一个分压电路，A1节点的另一端接入三级管VT1的集电极，开始时三级管工作于截止状态，因此A1节点经电阻分压得到一个使能芯片工作的判决电平，使第一控制芯片U1开始工作，电路输出端VOUT输出稳压后的电压。并接在电路输出端的电压采集网络P2和串接在第一控制芯片U1的20脚输出端的电流采集网络P1将采集到的电路输出的电流电压转换成合适的电压值送入单片机第二控制芯片U2的19脚和20脚使第二控制芯片U2采集到稳压输出的电流和电压参数，控制芯片内已事先编程，内含初始的电流限制条件，通过比较电流采集网络P1输入的相应电流值与事先设置好的电流上限，当电压采集网络P2输入的采集电压值达到预设值，而电流采集网络P1输入的采集电压对应的电流超过控制芯片预设的电流上限值，第二控制芯片U2的13脚会发出高频控制信号，通过第三电阻R3和三极管VT1的基极相连，使三极管VT1工作在高频开关状态，VT1的集电极电平迅速变化，导致第一控制芯片U1工作在使能和失能状态，从而使稳压电路不断工作在开关状态，从而抑制电流爬升，当电压采集网络P2输入的采集电压值达到预设值，而电流采集网络P1输入的采集电压对应的电流未达到控制芯片预先设定的电流上限值，第二控制芯片U2输出低电平，稳压电路正常使能工作。由于第二控制芯片U2的高频控制信号频率较高，使三极管VT1开关频率极快，稳压电路相当于无间断工作，稳压输出的电流电 压经采集网络P1和P2将采集电流电压数据送入第二控制芯片U2不断循环判断并发出相应的控制信号，达到限制电流的目的。
同时第二控制芯片U2的14、15、16、17脚通过SPI或串口与无线传输网络P3相连，控制器端经无线传输网络将限制的电流值及相关数据无线传送到单片机系统的第二控制芯片U2中，更新覆盖其初始的电流限制值，当稳压输出电压电流经采集网络转换再送入第二控制芯片U2判断，超过限制值时重复以上过程。
本实用新型提供的一种用于可发电健身单车的无线稳压限流电路的有益效果在于：与现有技术相比，现有技术的限流通常只能限制固定电流，通过一个简单的采集系统，通过修改硬件相关参数，可判断电流大小和固定的上限值，以达到一个固定的电流限制；或通过稳后端接入特定电流限制电路，通过调节电路上的可调电阻实现电流限制的目的。而本发明所阐述的无线限流技术采用了稳压器加单片机加无线传输的方案，通过单片机的片上模数转换器及其外围电路采集稳压输出的电流值及电压值，当稳压输出电压恒定，电流达到限制条件，单片机通过调整稳压芯片工作状态，实现对稳压器输出的控制，同时无线系统能够接收无线控制端发送过去的电流限制数据，及时传输到单片机上，更新限制电流条件，从而实现了稳压器的输出电流限制及无线传输限制电流参数。解决了以往限流电路限流值不可调、限流值不可以远程调节的问题。
附图说明
图1为本实用新型的电路原理示意图。
具体实施方式
下面将结合本实用新型实施例中的附图，对本实用新型实施例中的技术方案进行清楚、完整的描述，显然，所描述的实施例仅仅是本实用新型一部分实施例，而不是全部的实施例。本领域普通人员在没有做出创造性劳动前提下所获得的所有其他实施例，均属于本实用新型的保护范围。
实施例：一种用于可发电健身单车的无线稳压限流电路。
稳压限流器通常是利用单片机系统及其外围电路进行数据采集，由单片机判断数据是否超过限制条件，当超过限制条件，单片机控制稳压电路关闭工作。同时，利用单片机SPI与无线电路与控制器通讯，无线控制器通过单片机与简单电路构成控制模块，用于给稳压限流系统进行限流值的设定。
参照图1所示，一种用于可发电健身单车的无线稳压限流电路，包括：电源、第一控制芯 片U1、第二控制芯片U2、第一电阻R1、第二电阻R2、第三电阻R3、三极管VT1、电流采集网络P1、电压采集网络P2和无线传输网络P3；所述第一控制芯片U1中的1脚与输入电源相接，2脚并接第一电阻R1、第二电阻R2和三极管VT1的集电极，经第一电阻R1并接在1脚，经第二电阻R2接地；所述第一控制芯片U1的4脚接入三极管VT1的集电极，20脚直接与电流采集网络P1的IP+引脚相接，电流采集网络P1的IP-极直接串接到输出端；所述第二控制芯片U2中的7脚和9脚分别与地和电源相接；所述第二控制芯片U2的13脚串接第三电阻R3后与三极管VT1的基极相接；三级管VT1的射极直接与地相连；所述第二控制芯片U2的14、15、16、17脚分别与无线传输网络P3相接；所述第二控制芯片U2的19脚与电压采集网络P2的VOUT端相接，20脚与电流采集网络P1的VOUT相接。
参照图1所示，所述第一电阻R1并接在第一控制芯片U1的2脚和4脚之间；所述第二电阻R2的一侧并接在第一控制芯片U1的2脚和4脚，另一侧接地；所述第三电阻R3的一侧接在第二控制芯片U2的13脚，另一侧接在三极管VT1的基极；所述所述三极管VT1的基极与第二电阻R2一侧相连，集电极并接在第一控制芯片U1的2脚和4脚，发射极与地相连；所述电流采集网络P1的IP+脚与第一控制芯片U1的20脚相连，IP-脚与整个电路的输出相连，VOUT脚与第二控制芯片U2的20脚相连；所述电压采集网络P2的VIN脚与整个电路的输出端相连，VOUT脚与第二控制芯片U2的19脚相连。
本用于可发电健身单车的无线稳压限流电路的工作原理是：本用于可发电健身单车的无线稳压限流电路是由用于宽电压输入的电流模式同步降压控制器U1及其外围电路(图1中略)、具有SPI和AD采集外设的可编程单片机控制器U2、两个电阻、一个三极管、无线传输网络、电流和电压采集网络组成的宽电压降压稳压无线限流电路。
当输入端VIN有电源输入，第一电阻R1和第二电阻R2组成一个分压电路，A1节点的另一端接入三级管VT1的集电极，开始时三级管工作于截止状态，因此A1节点经电阻分压得到一个使能芯片工作的判决电平，使第一控制芯片U1开始工作，电路输出端VOUT输出稳压后的电压。并接在电路输出端的电压采集网络P2和串接在第一控制芯片U1的20脚输出端的电流采集网络P1将采集到的电路输出的电流电压转换成合适的电压值送入单片机第二控制芯片U2的19脚和20脚使第二控制芯片U2采集到稳压输出的电流和电压参数，控制芯片内已事先编程，内含初始的电流限制条件，通过比较电流采集网络P1输入的相应电流值与事先设置好的电流上限，当电压采集网络P2输入的采集电压值达到预设值，而电流采集网络P1输入的采集电压对应的电流超过控制芯片预设的电流上限值，第二控制芯片U2的13脚会发出高 频控制信号，通过第三电阻R3和三极管VT1的基极相连，使三极管VT1工作在高频开关状态，VT1的集电极电平迅速变化，导致第一控制芯片U1工作在使能和失能状态，从而使稳压电路不断工作在开关状态，从而抑制电流爬升，当电压采集网络P2输入的采集电压值达到预设值，而电流采集网络P1输入的采集电压对应的电流未达到控制芯片预先设定的电流上限值，第二控制芯片U2输出低电平，稳压电路正常使能工作。由于第二控制芯片U2的高频控制信号频率较高，使三极管VT1开关频率极快，稳压电路相当于无间断工作，稳压输出的电流电压经采集网络P1和P2将采集电流电压数据送入第二控制芯片U2不断循环判断并发出相应的控制信号，，达到限制电流的目的。
同时第二控制芯片U2的14、15、16、17脚通过SPI或串口与无线传输网络P3相连，控制器端(图中未画出)经无线传输网络将限制的电流值及相关数据无线传送到单片机系统的第二控制芯片U2中，更新覆盖其初始的电流限制值，当稳压输出电压电流经采集网络转换再送入第二控制芯片U2判断，超过限制值时重复以上过程。
以上所述为本实用新型的较佳实施例而已，但本实用新型不应局限于该实施例和附图所公开的内容，所以凡是不脱离本实用新型所公开的精神下完成的等效或修改，都落入本实用新型保护的范围。

Claims (7)

  1. 一种用于可发电健身单车的无线稳压限流电路，其特征在于包括：电源、第一控制芯片U1、第二控制芯片U2、第一电阻R1、第二电阻R2、第三电阻R3、三极管VT1、电流采集网络P1、电压采集网络P2和无线传输网络P3；
    所述第一控制芯片U1中的1脚与输入电源相接，2脚并接第一电阻R1、第二电阻R2和三极管VT1的集电极，经第一电阻R1并接在1脚，经第二电阻R2接地；
    所述第一控制芯片U1的4脚接入三极管VT1的集电极，20脚直接与电流采集网络P1的IP+引脚相接，电流采集网络P1的IP-极直接串接到输出端；
    所述第二控制芯片U2中的7脚和9脚分别与地和电源相接；
    所述第二控制芯片U2的13脚串接第三电阻R3后与三极管VT1的基极相接；三级管VT1的射极直接与地相连；
    所述第二控制芯片U2的14、15、16、17脚分别与无线传输网络P3相接；
    所述第二控制芯片U2的19脚与电压采集网络P2的VOUT端相接，20脚与电流采集网络P1的VOUT相接。
  2. 如权利要求1所述的用于可发电健身单车的无线稳压限流电路，其特征在于：所述第一电阻R1并接在第一控制芯片U1的2脚和4脚之间。
  3. 如权利要求1所述的用于可发电健身单车的无线稳压限流电路，其特征在于：所述第二电阻R2的一侧并接在第一控制芯片U1的2脚和4脚，另一侧接地。
  4. 如权利要求1所述的用于可发电健身单车的无线稳压限流电路，其特征在于：所述第三电阻R3的一侧接在第二控制芯片U2的13脚，另一侧接在三极管VT1的基极。
  5. 如权利要求1所述的用于可发电健身单车的无线稳压限流电路，其特征在于：所述三极管VT1的基极与第二电阻R2一侧相连，集电极并接在第一控制芯片U1的2脚和4脚，发射极与地相连。
  6. 如权利要求1所述的用于可发电健身单车的无线稳压限流电路，其特征在于：所述电流采集网络P1的IP+脚与第一控制芯片U1的20脚相连，IP-脚与整个电路的输出相连，VOUT脚与第二控制芯片U2的20脚相连。
  7. 如权利要求1所述的用于可发电健身单车的无线稳压限流电路，其特征在于：所述电压采集网络P2的VIN脚与整个电路的输出端相连，VOUT脚与第二控制芯片U2的19脚相连。
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