The invention discloses a new energy automobile charger voltage modulation circuit and a power supply noise elimination method. The circuit comprises a switch voltage transformation module, a constantcurrent control module, an anti-reverse connection module, a power polarity identification module and a photoelectric coupling impedance module. A triode Q8 in the switch voltage transformation module obtains a voltage value greater than a voltage value set by a collector end through a base end so as to realize a switch voltage transformation effect; a transistor Q4 in the constant current control module controls the output current to be constant, and a capacitor C6 is used for keeping the stability of the output voltage; a diode D6 in the anti-reverse connection module has unilateral conductivity, circuit conduction can be achieved only when the voltage of the positive electrode end is larger than that of the negative electrode end, and a transistor Q7 controls reverse-connection voltageto adjust the direction of output voltage; a triode Q6 in the power supply polarity identification module controls the correct direction of the polarity of the output power supply according to the reverse connection positive and negative voltage values; a photoelectric coupler U1 in the photoelectric coupling impedance module increases an external voltage and a capacitor C11 provides storage voltage, so that the anti-interference performance is improved.
本发明公开了一种新能源汽车充电机电压调制电路及电源噪声消除方法,包括:开关变压模块、恒流控制模块、防反接模块、电源极性识别模块、光电耦合阻抗模块,所述开关变压模块中三极管Q8通过基极端获取电压大于集电极端设定的电压值进而实现开关变压效果;所述恒流控制模块中晶体管Q4控制输出电流恒定,电容C6用于保持输出电压的稳定;所述防反接模块中二极管D6具有单向导电性只有正极端电压大于负极端电压才能实现电路导通,晶体管Q7将反接电压进行控制调整输出电压的方向;所述电源极性识别模块中三极管Q6根据反接正负极电压值控制输出电源极性正确方向;所述光电耦合阻抗模块中光电耦合器U1增加外加电压和电容C11提供储存电压,提高抗干扰性能。
New energy automobile charger voltage modulation circuit and power supply noise elimination method
一种新能源汽车充电机电压调制电路及电源噪声消除方法
2020-07-24
Patent
Electronic Resource
Chinese
IPC: | H02J CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER , Schaltungsanordnungen oder Systeme für die Abgabe oder Verteilung elektrischer Leistung / B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen / H02M APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS , Anlagen zur Umformung von Wechselstrom in Wechselstrom, von Wechselstrom in Gleichstrom oder umgekehrt, oder von Gleichstrom in Gleichstrom und zur Verwendung in Netzen oder ähnlichen Stromversorgungssystemen |
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