Application Tips/Application of 89C2051 in DC Bus Buck Controller

rain

Application Tips/Application of 89C2051 in DC Bus Buck Controller [Copy link]

To ensure that the controller can work reliably during a power outage, a DC power supply system is used in high-voltage power distribution control. During a power outage, the DC power supply system is powered by a battery. When the battery changes from floating charge to discharge state, the DC voltage is often very high (the floating charge voltage of a lead-acid battery is 255V, and the floating charge voltage of a cadmium-nickel battery is 280V). If the battery is directly connected to the bus, other controllers on the DC bus will be burned. Therefore, when the battery is connected to the DC bus, it must be reduced in voltage. Domestic DC bus buck controllers are mostly designed with analog circuits, which are complex and have poor stability. At the request of the manufacturer, we used the 89C2051 single-chip microcomputer to design a DC bus buck controller with digital circuits as the core. It has been put into use and has achieved good results. To ensure that the controller can work reliably during a power outage, a DC power supply system is used in high-voltage power distribution control. When the power is off, the DC power supply system is powered by batteries. When the batteries are switched from floating charge to discharge state, the DC voltage is often very high (the floating charge voltage of lead-acid batteries is 255V, and the floating charge voltage of nickel-cadmium batteries is 280V). If the batteries are directly connected to the bus, other controllers on the DC bus will be burned. Therefore, when the batteries are connected to the DC bus, the voltage must be reduced. Domestic DC bus voltage reduction controllers are mostly designed with analog circuits, which are complex and have poor stability. At the request of the manufacturer, we used the 89C2051 microcontroller to design a DC bus voltage reduction controller with digital circuit as the core. It has been put into use and has achieved good results.