CN216672847U - PWM signal enhancement circuit - Google Patents
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Abstract
本实用新型涉及电路技术领域，具体为一种PWM信号增强电路，包括信号发生器IC、第一控制IC和第二控制IC，所述信号发生器IC的4路输出信号依次为第一路输出信号PWM1、第二路输出信号PWM2、第三路输出信号PWM3和第四路输出信号PWM4，所述4路输出信号分别经过第一PWM信号增强驱动电路、第二WM信号增强驱动电路、第三WM信号增强驱动电路和第四WM信号增强驱动电路进行放大，放大后的信号驱动连接至第一控制芯片IC和第二控制芯片IC，本实用新型的有益效果如下：本实用新型通过增加多个PWM信号增强驱动电路，实现信号发生器IC输出的PWM信号电流放大后可驱动其他控制芯片或电路，实现了信号放大和电路耦合隔离的作用，在信号放大的同时对电路起到保护作用，使其更加安全。
The utility model relates to the technical field of circuits, in particular to a PWM signal enhancement circuit, comprising a signal generator IC, a first control IC and a second control IC, wherein the four output signals of the signal generator IC are in turn the first output signal Signal PWM1, the second output signal PWM2, the third output signal PWM3 and the fourth output signal PWM4, the four output signals pass through the first PWM signal enhancement drive circuit, the second WM signal enhancement drive circuit, the third The WM signal enhancement driving circuit and the fourth WM signal enhancement driving circuit are amplified, and the amplified signal is driven and connected to the first control chip IC and the second control chip IC. The beneficial effects of the present invention are as follows: The PWM signal enhances the drive circuit, realizes that the PWM signal output from the signal generator IC can drive other control chips or circuits after being amplified, and realizes the functions of signal amplification and circuit coupling and isolation. Its more secure.
Description
技术领域technical field
本实用新型涉及电路技术领域，具体为一种PWM信号增强电路。The utility model relates to the technical field of circuits, in particular to a PWM signal enhancement circuit.
背景技术Background technique
逆变器的控制主板电路中信号发生器IC与多个控制IC直接连接，由于信号发生器IC的多路PWM输出信号经常发生信号衰减，导至不能信号发生器IC的PWM信号不能驱动控制IC，因此需要对其进行改进，使多路PWM输出信号能够直接驱动控制IC芯片。The signal generator IC in the control board circuit of the inverter is directly connected with multiple control ICs. Since the multi-channel PWM output signals of the signal generator IC often experience signal attenuation, the PWM signal of the signal generator IC cannot drive the control IC. , so it needs to be improved, so that the multi-channel PWM output signal can directly drive the control IC chip.
实用新型内容Utility model content
本实用新型主要是解决上述现有技术所存在的技术问题，提供一种PWM信号增强电路，解决了信号发生器IC不能驱动控制IC的问题。The utility model mainly solves the technical problems existing in the above-mentioned prior art, provides a PWM signal enhancement circuit, and solves the problem that the signal generator IC cannot drive the control IC.
为实现上述目的，本实用新型提供如下技术方案：一种PWM信号增强电路，包括信号发生器IC、第一控制IC和第二控制IC，所述信号发生器IC的4路输出信号依次为第一路输出信号PWM1、第二路输出信号PWM2、第三路输出信号PWM3和第四路输出信号PWM4，所述4路输出信号分别经过第一PWM信号增强驱动电路、第二WM信号增强驱动电路、第三WM信号增强驱动电路和第四WM信号增强驱动电路进行放大，放大后的信号驱动连接至第一控制芯片IC和第二控制芯片IC。In order to achieve the above-mentioned purpose, the utility model provides the following technical scheme: a PWM signal enhancement circuit, comprising a signal generator IC, a first control IC and a second control IC, and the 4-way output signals of the signal generator IC are successively No. One output signal PWM1, the second output signal PWM2, the third output signal PWM3 and the fourth output signal PWM4, the four output signals pass through the first PWM signal enhancement driving circuit and the second WM signal enhancement driving circuit respectively , The third WM signal enhancement driving circuit and the fourth WM signal enhancement driving circuit perform amplification, and the amplified signal is driven and connected to the first control chip IC and the second control chip IC.
作为上述PWM信号增强电路的一种具体方案，第一PWM信号增强驱动电路包括电阻R1、电阻R2和三极管Q1，电阻R1的一端连接信号发生器IC的第一路输出信号PWM1的引脚，电阻R1的另一端连接至三极管Q1的B极，三极管Q1的C极连接至5V直流电压，三极管Q1的E极连接至第一控制芯片IC的高电平信号输入引脚，电阻R2的一端连接至三极管Q1的B极，电阻R2的另一端接地。As a specific solution of the above-mentioned PWM signal enhancement circuit, the first PWM signal enhancement drive circuit includes a resistor R1, a resistor R2 and a transistor Q1, one end of the resistor R1 is connected to the pin of the first output signal PWM1 of the signal generator IC, and the resistor The other end of R1 is connected to the B pole of the transistor Q1, the C pole of the transistor Q1 is connected to 5V DC voltage, the E pole of the transistor Q1 is connected to the high-level signal input pin of the first control chip IC, and one end of the resistor R2 is connected to The B pole of the transistor Q1 and the other end of the resistor R2 are grounded.
作为上述PWM信号增强电路的一种具体方案，第二PWM信号增强驱动电路包括电阻R3，电阻R4和三极管Q2，电阻R3的一端连接信号发生器IC的第二路输出信号PWM2的引脚，电阻R3的另一端连接至三极管Q2的B极，三极管Q2的C极连接至5V直流电压，三极管Q2的E极连接至第一控制芯片IC的低电平信号输入引脚，电阻R4的一端连接至三极管Q2的B极，电阻R4的另一端接地。As a specific solution of the above-mentioned PWM signal enhancement circuit, the second PWM signal enhancement drive circuit includes a resistor R3, a resistor R4 and a transistor Q2, and one end of the resistor R3 is connected to the pin of the second output signal PWM2 of the signal generator IC, and the resistor The other end of R3 is connected to the B pole of the transistor Q2, the C pole of the transistor Q2 is connected to the 5V DC voltage, the E pole of the transistor Q2 is connected to the low-level signal input pin of the first control chip IC, and one end of the resistor R4 is connected to The B pole of the transistor Q2 and the other end of the resistor R4 are grounded.
作为上述PWM信号增强电路的一种具体方案，第三PWM信号增强驱动电路包括电阻R5，电阻R6和三极管Q3，电阻R5的一端连接信号发生器IC的第三路输出信号PWM3的引脚，电阻R5的另一端连接至三极管Q3的B极，三极管Q3的C极连接至5V直流电压，三极管Q3的E极连接至第二控制芯片IC的高电平信号输入引脚，电阻R6的一端连接至三极管Q2的B极，电阻R5的另一端接地。As a specific scheme of the above-mentioned PWM signal enhancement circuit, the third PWM signal enhancement driving circuit includes a resistor R5, a resistor R6 and a transistor Q3, one end of the resistor R5 is connected to the pin of the third output signal PWM3 of the signal generator IC, and the resistor The other end of R5 is connected to the B pole of the transistor Q3, the C pole of the transistor Q3 is connected to 5V DC voltage, the E pole of the transistor Q3 is connected to the high-level signal input pin of the second control chip IC, and one end of the resistor R6 is connected to The B pole of the transistor Q2 and the other end of the resistor R5 are grounded.
作为上述PWM信号增强电路的一种具体方案，第四PWM信号增强驱动电路包括电阻R7，电阻R8和三极管Q4，电阻R7的一端连接信号发生器IC的第四路输出信号PWM4的引脚，电阻R7的另一端连接至三极管Q4的B极，三极管Q4的C极连接至5V直流电压，三极管Q4的E极连接至第二控制芯片IC的低电平信号输入引脚，电阻R8的一端连接至三极管Q4的B极，电阻R5的另一端接地As a specific scheme of the above-mentioned PWM signal enhancement circuit, the fourth PWM signal enhancement drive circuit includes a resistor R7, a resistor R8 and a transistor Q4, one end of the resistor R7 is connected to the pin of the fourth output signal PWM4 of the signal generator IC, and the resistor The other end of R7 is connected to the B pole of the transistor Q4, the C pole of the transistor Q4 is connected to the 5V DC voltage, the E pole of the transistor Q4 is connected to the low-level signal input pin of the second control chip IC, and one end of the resistor R8 is connected to The B pole of the transistor Q4, the other end of the resistor R5 is grounded
与现有技术相比，本实用新型的有益效果如下：本实用新型通过增加多个PWM信号增强驱动电路，实现信号发生器IC输出的PWM信号电流放大后可驱动其他控制芯片或电路，实现了信号放大和电路耦合隔离的作用，在信号放大的同时对电路起到保护作用，使其更加安全。Compared with the prior art, the beneficial effects of the present utility model are as follows: the present utility model can drive other control chips or circuits after amplifying the PWM signal current output by the signal generator IC by adding a plurality of PWM signal enhancement driving circuits, thereby realizing the The functions of signal amplification and circuit coupling isolation protect the circuit while signal amplification, making it safer.
附图说明Description of drawings
图1为本实用新型的电路图；Fig. 1 is the circuit diagram of the utility model;
具体实施方式Detailed ways
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、完整地描述，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。基于本实用新型中的实施例，本领域普通技术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，都属于本实用新型保护的范围。The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the implementations. example. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.
请参阅图1，一种PWM信号增强电路的实施例，包括信号发生器IC、第一控制IC和第二控制IC，所述信号发生器IC的4路输出信号依次为第一路输出信号PWM1、第二路输出信号PWM2、第三路输出信号PWM3和第四路输出信号PWM4，所述4路输出信号分别经过第一PWM信号增强驱动电路、第二WM信号增强驱动电路、第三WM信号增强驱动电路和第四WM信号增强驱动电路进行放大，放大后的信号驱动连接至第一控制芯片IC和第二控制芯片IC。Please refer to FIG. 1 , an embodiment of a PWM signal enhancement circuit includes a signal generator IC, a first control IC and a second control IC, and the four output signals of the signal generator IC are sequentially the first output signal PWM1 , the second output signal PWM2, the third output signal PWM3 and the fourth output signal PWM4, the 4 output signals pass through the first PWM signal enhancement drive circuit, the second WM signal enhancement drive circuit, and the third WM signal respectively. The enhancement driving circuit and the fourth WM signal enhancement driving circuit perform amplification, and the amplified signal is driven and connected to the first control chip IC and the second control chip IC.
更具体的，第一PWM信号增强驱动电路包括电阻R1、电阻R2和三极管Q1，电阻R1的一端连接信号发生器IC的第一路输出信号PWM1的引脚，电阻R1的另一端连接至三极管Q1的B极，三极管Q1的C极连接至5V直流电压，三极管Q1的E极连接至第一控制芯片IC的高电平信号输入引脚，电阻R2的一端连接至三极管Q1的B极，电阻R2的另一端接地。More specifically, the first PWM signal enhancement drive circuit includes a resistor R1, a resistor R2 and a transistor Q1, one end of the resistor R1 is connected to the pin of the first output signal PWM1 of the signal generator IC, and the other end of the resistor R1 is connected to the transistor Q1. The B pole of the transistor Q1 is connected to the 5V DC voltage, the E pole of the transistor Q1 is connected to the high-level signal input pin of the first control chip IC, one end of the resistor R2 is connected to the B pole of the transistor Q1, and the resistor R2 the other end is grounded.
更具体的，第二PWM信号增强驱动电路包括电阻R3，电阻R4和三极管Q2，电阻R3的一端连接信号发生器IC的第二路输出信号PWM2的引脚，电阻R3的另一端连接至三极管Q2的B极，三极管Q2的C极连接至5V直流电压，三极管Q2的E极连接至第一控制芯片IC的低电平信号输入引脚，电阻R4的一端连接至三极管Q2的B极，电阻R4的另一端接地。More specifically, the second PWM signal enhancement drive circuit includes a resistor R3, a resistor R4 and a transistor Q2. One end of the resistor R3 is connected to the pin of the second output signal PWM2 of the signal generator IC, and the other end of the resistor R3 is connected to the transistor Q2. The B pole of the transistor Q2 is connected to the 5V DC voltage, the E pole of the transistor Q2 is connected to the low-level signal input pin of the first control chip IC, one end of the resistor R4 is connected to the B pole of the transistor Q2, and the resistor R4 the other end is grounded.
更具体的，第三PWM信号增强驱动电路包括电阻R5，电阻R6和三极管Q3，电阻R5的一端连接信号发生器IC的第三路输出信号PWM3的引脚，电阻R5的另一端连接至三极管Q3的B极，三极管Q3的C极连接至5V直流电压，三极管Q3的E极连接至第二控制芯片IC的高电平信号输入引脚，电阻R6的一端连接至三极管Q2的B极，电阻R5的另一端接地。More specifically, the third PWM signal enhancement driving circuit includes a resistor R5, a resistor R6 and a transistor Q3. One end of the resistor R5 is connected to the pin of the third output signal PWM3 of the signal generator IC, and the other end of the resistor R5 is connected to the transistor Q3. The B pole of the transistor Q3 is connected to the 5V DC voltage, the E pole of the transistor Q3 is connected to the high-level signal input pin of the second control chip IC, one end of the resistor R6 is connected to the B pole of the transistor Q2, and the resistor R5 the other end is grounded.
更具体的，第四PWM信号增强驱动电路包括电阻R7，电阻R8和三极管Q4，电阻R7的一端连接信号发生器IC的第四路输出信号PWM4的引脚，电阻R7的另一端连接至三极管Q4的B极，三极管Q4的C极连接至5V直流电压，三极管Q4的E极连接至第二控制芯片IC的低电平信号输入引脚，电阻R8的一端连接至三极管Q4的B极，电阻R5的另一端接地。More specifically, the fourth PWM signal enhancement driving circuit includes a resistor R7, a resistor R8 and a transistor Q4. One end of the resistor R7 is connected to the pin of the fourth output signal PWM4 of the signal generator IC, and the other end of the resistor R7 is connected to the transistor Q4. The B pole of the transistor Q4 is connected to the 5V DC voltage, the E pole of the transistor Q4 is connected to the low-level signal input pin of the second control chip IC, one end of the resistor R8 is connected to the B pole of the transistor Q4, and the resistor R5 the other end is grounded.
工作原理：本电路一般使用在逆变器电路中，信号发生器IC的主要作用在于输出多路PWM信号以驱动控制IC，当PWM信号较弱驱动不了其他芯片或电路时，通过增加PWM信号驱动增强电路，实现PWM信号电流放大后便可驱动其他芯片或电路，实现了信号放大和电路耦合隔离的作用。Working principle: This circuit is generally used in inverter circuits. The main function of the signal generator IC is to output multiple PWM signals to drive the control IC. When the PWM signal is weak and cannot drive other chips or circuits, it can be driven by increasing the PWM signal. The enhanced circuit enables other chips or circuits to be driven after the PWM signal current is amplified, realizing the functions of signal amplification and circuit coupling and isolation.
尽管已经示出和描述了本实用新型的实施例，对于本领域的普通技术人员而言，可以理解在不脱离本实用新型的原理和精神的情况下可以对这些实施例进行多种变化、修改、替换和变型，本实用新型的范围由所附权利要求及其等同物限定。Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes and modifications can be made to these embodiments without departing from the principles and spirit of the present invention , alternatives and modifications, the scope of the present invention is defined by the appended claims and their equivalents.
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