Motorcycle test power supply

Abstract

The utility model discloses a motorcycle test power supply, which comprises a switching power supply module, a digital control module and a feedback regulation module, the first input end of the feedback adjusting module is connected with the power output end of the switching power supply module, the second input end of the feedback adjusting module is connected with the output end of the digital control module, and the output end of the feedback adjusting module is connected with the feedback end of the switching power supply module. According to the utility model, the advantage of high voltage stepping precision can be realized through the feedback regulation module.

Description

Technical Field

[0001] The utility model relates to the field of motorcycles, in particular to a motorcycle test power supply. Background Art

[0002] Conventional CNC power supplies currently on the market typically have a linear relationship between their output and input over the entire range. For example, if the CNC power supply's output voltage is 0-16V and the D / A converter has an 8-bit (256-step) bit count, the minimum output voltage step accuracy is 16 / 256 = 62.5mV, resulting in poor step accuracy. However, existing motorcycle electronic components typically require a supply voltage of 10V-15V. Therefore, if a 0-16V CNC power supply is used during factory inspection of these components, any voltage output below 10V would be useless. However, if the D / A converter's output range could be linearly mapped to 10V-15V, the minimum output voltage step accuracy would be (15-10) / 256 = 19.5mV, effectively improving step accuracy by approximately 3.2 times.

[0003] In view of the existence of the above problems, it is necessary to study a motorcycle test power supply, which has the advantage of high voltage step accuracy. Utility Model Content

[0004] The purpose of the utility model is to provide a motorcycle test power supply, which has the advantage of high voltage step accuracy.

[0005] In order to achieve the above objectives, the solution of the present invention is:

[0006] A motorcycle test power supply comprises a switching power supply module, a digital control module and a feedback regulation module; a first input end of the feedback regulation module is connected to a power output end of the switching power supply module, a second input end of the feedback regulation module is connected to an output end of the digital control module, and an output end of the feedback regulation module is connected to a feedback end of the switching power supply module; the feedback regulation module comprises a resistor R2, a resistor R3, a resistor R6, a resistor R7 and an operational amplifier U1, a first end of the resistor R2 is connected to a first input end of the feedback regulation module, a second end of the resistor R2 and a first end of the resistor R3 are connected to a non-inverting input end of the operational amplifier U1, an inverting input end of the operational amplifier U1 and a first end of the resistor R7 are connected to a first end of the resistor R6, a second end of the resistor R6 is connected to a second input end of the feedback regulation module, and an output end of the operational amplifier U1 and a second end of the resistor R7 are connected to an output end of the feedback regulation module.

[0007] The switching power supply module includes a resistor R1, an inductor L1, a capacitor C1, a capacitor C2, a capacitor C3, a diode D1, a diode D2 and a switching voltage regulator U0; the positive electrode of the diode D1 is connected to the input end of the switching power supply module, the positive electrode of the diode D1 is connected to the positive electrode of the capacitor C1, the first end of the capacitor C2 and the Vin pin of the switching voltage regulator U0, the FB pin of the switching voltage regulator U0 is connected to the feedback end of the switching power supply module through the resistor R1, the Vout pin of the switching voltage regulator U0 is connected to the negative electrode of the diode D2 and the first end of the inductor L1, the second end of the inductor L1 and the positive electrode of the capacitor C3 are connected to the output end of the switching power supply module, the negative electrode of the capacitor C3, the second end of the capacitor C2, the negative electrode of the capacitor C1, and the GND pin and ON / OFF pin of the switching voltage regulator U0 are grounded.

[0008] The model of the switching voltage regulator U0 is LM2596-ADJ.

[0009] The digital control module includes a digital-to-analog converter and a voltage amplifier circuit. The output end of the digital-to-analog converter is connected to the input end of the voltage amplifier circuit, and the output end of the voltage amplifier circuit is connected to the output end of the digital control module.

[0010] The voltage amplifier circuit includes a resistor R4, a resistor R8, a resistor R9, a capacitor C4 and an operational amplifier U2, wherein the first end of the resistor R4 is connected to the input end of the voltage amplifier circuit, the second end of the resistor R4 and the first end of the capacitor C4 are connected to the non-inverting input end of the operational amplifier U2, the inverting input end of the operational amplifier U2 is connected to the first end of the resistor R8 and the first end of the resistor R9, the output end of the operational amplifier U2 and the second end of the resistor R9 are connected to the output end of the voltage amplifier circuit, and the second end of the resistor R8 and the second end of the capacitor C4 are grounded.

[0011] After adopting the above scheme, the working principle of the utility model is:

[0012] According to the voltage division principle, we can get formula 1: Vret = Vout*r3 / (r2+r3);

[0013] According to the virtual-break principle of the operational amplifier, we can get formula 2: (VB-VA) / r6=(FB-VB) / r7;

[0014] According to the virtual short principle of the operational amplifier, we can get formula 3: Vret = VB;

[0015] Wherein, Vout is the output voltage of the switching power supply module (i.e., the output voltage of the motorcycle test power supply of the present utility model), VA is the output voltage of the digital control module, VB is the voltage of the inverting input terminal of the operational amplifier U1, Vret is the voltage of the non-inverting input terminal of the operational amplifier U1, FB is the output voltage of the operational amplifier U1 (i.e., the feedback terminal voltage of the switching power supply module), r2 is the resistance value of the resistor R2, r3 is the resistance value of the resistor R3, r6 is the resistance value of the resistor R6, and r7 is the resistance value of the resistor R7;

[0016] Combining Equation 1, Equation 2, and Equation 3, we can get Equation 4:

[0017] Vout=[(VA / r6+FB / r7)*(r6*r7)(r2+r3)] / [(r6+ / r7) *r3];

[0018] Since the feedback terminal voltage FB is a stable positive voltage when the switching power supply module is working stably, and r2, r3, r6 and r7 are fixed values, and the output voltage VA of the digital control module is greater than or equal to zero; thus, the value of the output voltage Vout of the motorcycle test power supply of the utility model is positively correlated with the output voltage VA of the digital control module, and the value of the output voltage Vout of the motorcycle test power supply of the utility model is always greater than zero; thus, it can be seen that the motorcycle test power supply of the utility model can adjust the output voltage Vout of the motorcycle test power supply of the utility model by adjusting the value of the output voltage VA of the digital control module, thereby realizing the function of a digital control power supply; and since the minimum output voltage of the motorcycle test power supply of the utility model is greater than zero, compared with the existing digital control power supply that starts outputting from zero, when the maximum output voltage of the motorcycle test power supply of the utility model is the same as the maximum output voltage of the existing digital control power supply and the number of bits of the digital control modules of the two are the same, the motorcycle test power supply of the utility model can achieve higher voltage step accuracy. Among them, the utility model can adjust the resistance value of resistor R2, the resistance value of resistor R3, the resistance value of resistor R6 and the resistance value of resistor R7, so that the output voltage range of the motorcycle test power supply of the utility model is roughly between 10V and 15V to meet the power supply voltage required by the electronic accessories of the motorcycle. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a circuit diagram of the utility model. DETAILED DESCRIPTION

[0020] In order to further explain the technical solution of the present invention, the present invention will be described in detail below through specific embodiments.

[0021] like Figure 1As shown, the utility model discloses a motorcycle test power supply, which is characterized by comprising a switching power supply module, a digital control module and a feedback regulation module; the first input end of the feedback regulation module is connected to the power output end of the switching power supply module, the second input end of the feedback regulation module is connected to the output end of the digital control module, and the output end of the feedback regulation module is connected to the feedback end of the switching power supply module; the feedback regulation module comprises a resistor R2, a resistor R3, a resistor R6, a resistor R7 and an operational amplifier U1, the first end of the resistor R2 is connected to the first input end of the feedback regulation module, the second end of the resistor R2 and the first end of the resistor R3 are connected to the non-inverting input end of the operational amplifier U1, the inverting input end of the operational amplifier U1 and the first end of the resistor R7 are connected to the first end of the resistor R6, the second end of the resistor R6 is connected to the second input end of the feedback regulation module, and the output end of the operational amplifier U1 and the second end of the resistor R7 are connected to the output end of the feedback regulation module.

[0022] The working principle of this utility model is:

[0023] According to the voltage division principle, we can get formula 1: Vret = Vout*r3 / (r2+r3);

[0024] According to the virtual-break principle of the operational amplifier, we can get formula 2: (VB-VA) / r6=(FB-VB) / r7;

[0025] According to the virtual short principle of the operational amplifier, we can get formula 3: Vret = VB;

[0026] Wherein, Vout is the output voltage of the switching power supply module (i.e., the output voltage of the motorcycle test power supply of the present utility model), VA is the output voltage of the digital control module, VB is the voltage of the inverting input terminal of the operational amplifier U1, Vret is the voltage of the non-inverting input terminal of the operational amplifier U1, FB is the output voltage of the operational amplifier U1 (i.e., the feedback terminal voltage of the switching power supply module), r2 is the resistance value of the resistor R2, r3 is the resistance value of the resistor R3, r6 is the resistance value of the resistor R6, and r7 is the resistance value of the resistor R7;

[0027] Combining Equation 1, Equation 2, and Equation 3, we can get Equation 4:

[0028] Vout=[(VA / r6+FB / r7)*(r6*r7)(r2+r3)] / [(r6+ / r7) *r3];

[0029] Since the feedback terminal voltage FB is a stable positive voltage when the switching power supply module is working stably, and r2, r3, r6 and r7 are fixed values, and the output voltage VA of the digital control module is greater than or equal to zero; thus, the value of the output voltage Vout of the motorcycle test power supply of the utility model is positively correlated with the output voltage VA of the digital control module, and the value of the output voltage Vout of the motorcycle test power supply of the utility model is always greater than zero; thus, it can be seen that the motorcycle test power supply of the utility model can adjust the output voltage Vout of the motorcycle test power supply of the utility model by adjusting the value of the output voltage VA of the digital control module, thereby realizing the function of a digital control power supply; and since the minimum output voltage of the motorcycle test power supply of the utility model is greater than zero, compared with the existing digital control power supply that starts outputting from zero, when the maximum output voltage of the motorcycle test power supply of the utility model is the same as the maximum output voltage of the existing digital control power supply and the number of bits of the digital control modules of the two are the same, the motorcycle test power supply of the utility model can achieve higher voltage step accuracy. Among them, the utility model can adjust the resistance value of resistor R2, the resistance value of resistor R3, the resistance value of resistor R6 and the resistance value of resistor R7, so that the output voltage range of the motorcycle test power supply of the utility model is roughly between 10V and 15V to meet the power supply voltage required by the electronic accessories of the motorcycle.

[0030] In the embodiment of the present invention, specifically, FB can be 1.23V; r2 is 8.2KΩ, r3 is 1KΩ, r6 is 10KΩ, r7 is 1.5KΩ, and VA is 0~5V (that is, the maximum output voltage of the digital control module is 5V). In this way, the output voltage range of the motorcycle test power supply of the present invention is 9.85V~15.85V.

[0031] In an embodiment of the present invention, the switching power supply module includes a resistor R1, an inductor L1, a capacitor C1, a capacitor C2, a capacitor C3, a diode D1, a diode D2, and a switching voltage regulator U0. The model of the switching voltage regulator U0 is LM2596-ADJ. The anode of the diode D1 is connected to the input terminal of the switching power supply module, the anode of the diode D1 is connected to the anode of the capacitor C1, the first end of the capacitor C2, and the Vin pin of the switching voltage regulator U0. The FB pin of the switching voltage regulator U0 is connected to the feedback terminal of the switching power supply module through the resistor R1. The Vout pin of the switching voltage regulator U0 is connected to the cathode of the diode D2 and the first end of the inductor L1. The second end of the inductor L1 and the anode of the capacitor C3 are connected to the output terminal of the switching power supply module. The cathode of the capacitor C3, the second end of the capacitor C2, the cathode of the capacitor C1, and the GND pin and ON / OFF pin of the switching voltage regulator U0 are grounded. The input voltage of the switching power supply module can be 24V.

[0032] In an embodiment of the present invention, the digital control module includes a digital-to-analog converter and a voltage amplifier circuit. The output of the digital-to-analog converter is connected to the input of the voltage amplifier circuit, and the output of the voltage amplifier circuit is connected to the output of the digital control module. The digital-to-analog converter can have an 8-bit (i.e., 256-bit) output, the voltage amplifier circuit has an amplification factor of 2, and the output voltage range of the digital-to-analog converter is 0 to 2.5V (i.e., the supply voltage of the digital-to-analog converter is 2.5V).

[0033] In an embodiment of the present utility model, the voltage amplification circuit includes a resistor R4, a resistor R8, a resistor R9, a capacitor C4 and an operational amplifier U2, the first end of the resistor R4 is connected to the input end of the voltage amplification circuit, the second end of the resistor R4 and the first end of the capacitor C4 are connected to the non-inverting input end of the operational amplifier U2, the inverting input end of the operational amplifier U2 is connected to the first end of the resistor R8 and the first end of the resistor R9, the output end of the operational amplifier U2 and the second end of the resistor R9 are connected to the output end of the voltage amplification circuit, and the second end of the resistor R8 and the second end of the capacitor C4 are grounded.

[0034] The above embodiments and drawings do not limit the product form and style of the present invention. Any appropriate changes or modifications made by ordinary technicians in the relevant technical field should be deemed to be within the patent scope of the present invention.

Claims

1. A motorcycle test power supply, characterized by: It includes a switching power supply module, a digital control module and a feedback regulation module; the first input end of the feedback regulation module is connected to the power output end of the switching power supply module, the second input end of the feedback regulation module is connected to the output end of the digital control module, and the output end of the feedback regulation module is connected to the feedback end of the switching power supply module; The feedback regulation module includes a resistor R2, a resistor R3, a resistor R6, a resistor R7 and an operational amplifier U1. The first end of the resistor R2 is connected to the first input end of the feedback regulation module, the second end of the resistor R2 and the first end of the resistor R3 are connected to the non-inverting input end of the operational amplifier U1, the inverting input end of the operational amplifier U1 and the first end of the resistor R7 are connected to the first end of the resistor R6, the second end of the resistor R6 is connected to the second input end of the feedback regulation module, and the output end of the operational amplifier U1 and the second end of the resistor R7 are connected to the output end of the feedback regulation module.

2. A motorcycle test power supply according to claim 1, characterized in that: The switching power supply module includes a resistor R1, an inductor L1, a capacitor C1, a capacitor C2, a capacitor C3, a diode D1, a diode D2 and a switching voltage regulator U0; The positive electrode of the diode D1 is connected to the input end of the switching power supply module, the positive electrode of the diode D1 is connected to the positive electrode of the capacitor C1, the first end of the capacitor C2 and the Vin pin of the switching voltage regulator U0, the FB pin of the switching voltage regulator U0 is connected to the feedback end of the switching power supply module through the resistor R1, the Vout pin of the switching voltage regulator U0 is connected to the negative electrode of the diode D2 and the first end of the inductor L1, the second end of the inductor L1 and the positive electrode of the capacitor C3 are connected to the output end of the switching power supply module, the negative electrode of the capacitor C3, the second end of the capacitor C2, the negative electrode of the capacitor C1, and the GND pin and ON / OFF pin of the switching voltage regulator U0 are grounded.

3. A motorcycle test power supply as claimed in claim 2, characterized in that: The model of the switching voltage regulator U0 is LM2596-ADJ.

4. A motorcycle test power supply according to claim 1, characterized in that: The digital control module includes a digital-to-analog converter and a voltage amplifier circuit. The output end of the digital-to-analog converter is connected to the input end of the voltage amplifier circuit, and the output end of the voltage amplifier circuit is connected to the output end of the digital control module.

5. A motorcycle test power supply as claimed in claim 4, characterized in that: The voltage amplifier circuit includes a resistor R4, a resistor R8, a resistor R9, a capacitor C4 and an operational amplifier U2, wherein the first end of the resistor R4 is connected to the input end of the voltage amplifier circuit, the second end of the resistor R4 and the first end of the capacitor C4 are connected to the non-inverting input end of the operational amplifier U2, the inverting input end of the operational amplifier U2 is connected to the first end of the resistor R8 and the first end of the resistor R9, the output end of the operational amplifier U2 and the second end of the resistor R9 are connected to the output end of the voltage amplifier circuit, and the second end of the resistor R8 and the second end of the capacitor C4 are grounded.

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