The embodiment of the invention provides a braking system and a new energy automobile, the braking system comprises a motor bus and a motor load connected with the motor bus, the motor load is set as a braking motor of a mobile device, the motor bus is provided with a power supply, a back-to-back MOS and a motor drive axle in series, and the motor bus is provided with a capacitance circuit in parallel; the back-to-back MOS is connected to the control module; the control module adopts a variable PWM signal to control the back-to-back MOS; when the motor bus is powered, the duty ratio of the variable PWM signal is equal to the preset duty ratio plus the motor bus voltage value/the power supply voltage value. Therefore, when the voltage value of the motor bus is low, a low duty ratio is kept, on one hand, the problem of power supply voltage loss caused by overlarge charging power is avoided, and on the other hand, the ripple problem caused by overlarge voltage change of the motor bus can be avoided. And moreover, the charging power of the power supply can be quickly improved under the stable condition, so that the motor bus can immediately respond after being electrified, and the safety of the braking system is improved.
本申请实施例提供了一种制动系统及新能源汽车,包括电机母线以及与所述电机母线连接的电机负载,其中,所述电机负载设置为移动装置的制动电机,电机母线串联设置有电源、背靠背MOS和电机驱动桥,且电机母线并联设置有电容电路;背靠背MOS连接至控制模块;且控制模块采用可变PWM信号控制背靠背MOS;对电机母线供电时,可变PWM信号的占空比=预设占空比+电机母线电压值/电源电压值。从而在电机母线电压值较低时保持较低的占空比,一方面避免充电功率过大导致电源失压的问题,另一方面,可以避免电机母线电压变化过大导致的纹波问题。并且,能在稳定的情况下,快速提高电源的充电功率,从而保证上电后,电机母线能立即响应,提高制动系统的安全性。
Braking system and new energy automobile
一种制动系统及新能源汽车
2025-03-25
Patent
Electronic Resource
Chinese
IPC: | 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 / H02P CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS , Steuern oder Regeln von elektrischen Motoren, elektrischen Generatoren, dynamoelektrischen Umformern |
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