The controller protects the safety of the motor and battery

by:Mainbon     2021-06-16
A large current flows through the motor windings. Over time, the temperature rise of the motor will rise, leading to aging of the winding insulation, which may affect the life of the motor, or burn the motor. The electric tricycle controller should be comprehensively designed taking into account the actual use of the battery and the motor. The relationship between the battery, the controller and the motor should be fully considered, and they should be designed as a comprehensive system to obtain a more ideal controller. It should not be the current commercially available electric vehicle speed governor that only has the functions of stepless speed regulation, brake power failure, soft start...etc. This controller can realize the direct short-circuit protection of the output terminal. Even when the motor is operating at the highest speed (when the output voltage is usually the highest), the output terminal of the controller is directly short-circuited, the controller can also be very reliable protection. In view of the actual use of electric bicycles, locked-rotor is one of the possible working conditions. If the controller can reliably protect the output terminal from short-circuit, the controller can also protect and protect the motor under the condition of motor locked-rotor. And the safety of batteries. If there is only a controller with current limiting function, it will output a large current (such as current limiting 14A) at this time. These make the battery (capacity 12AH) in a large current discharge state (14A), which will affect the service life of the battery. During protection, the circuit automatically reduces the output current to protect the safety of the battery. At this time, the current is about 0.3A, and the status of the output terminal is checked at any time. When the output terminal is faulty, the controller can automatically resume normal control and has a self-recovery function. Therefore, the controller has a self-protection capability, which improves the safety of the controller and the battery, and also improves the tolerance to the fault of the motor itself.
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