After ten years of rapid development, electric vehicles, a consumer product, are indispensable to the common people just like firewood, rice, oil and salt. According to relevant statistics, as of the end of 2013, the number of electric vehicles in the national market has reached 150 million.

The controller can realize the direct short-circuit protection of the output terminal, even when the motor is at the highest speed action (the highest voltage is usually output at this time) directly short-circuit the output terminal of the controller, the controller can also be very reliable protection. During protection, the circuit automatically reduces the output current to protect the safety of the battery.

The controller adopts a double closed loop control system (brushless: speed/current double closed loop, brush: voltage/current double closed loop). Due to the existence of the current loop, the current can be limited, which can protect the electric vehicle in various normal conditions.

Some controllers on the market only have the function of under-voltage protection, that is, when the battery voltage is lower than a certain voltage value (such as 32V), the controller is blocked from working, which makes it easy for users to use the battery's rising voltage to work (that is, after the battery stops discharging , The battery voltage will rise by 2～3v), causing the battery to over discharge.

There are two types of electric vehicle controllers in terms of structure. We call them separate and integral types.