Motor stalling protection control method and device for electric vehicles and electric vehicle
A technology for motor stall and protection control, applied in the direction of motor control, control system, electrical components, etc., can solve problems such as being unfavorable for electric vehicles to jump out of the stall state, low safety and reliability of vehicle systems, and dangers. Increased safety and reliability, increased likelihood, reduced risk of temperature rise
Active Publication Date: 2018-07-03
BORGWARD AUTOMOTIVE CHINA CO LTD
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This scheme adopts the limitation of the locked-rotor current running time and then limits the locked-rotor current. Although it can also play a certain protective function, as the insulation of the motor ages, the time to withstand the locked-rotor current will also decrease. Limiting the operation of the locked-rotor current Therefore, the fixed-time scheme is dangerous.
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[0029] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings, in which the same or similar reference numerals indicate the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the drawings are exemplary, and are only used to explain the present invention, but should not be understood as limiting the present invention.
[0030] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", " The orientation or positional relationship indicated by "vertical", "horizontal", "top", "bottom", "inner", "outer" etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and The description is simplified, rather than indicating or impl...
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The invention provides a motor stalling protection control method and device for electric vehicles and an electric vehicle. The method comprises the following steps: when judging that a motor stalls,controlling the motor according to a first given speed and an analog rotor position angle under the first given speed, in order to obtain a rotor position angle when the motor outputs a preset maximumtorque; and controlling the motor according to the rotor position angle when the motor outputs the preset maximum torque and a second given speed, in order to prolong the time for the motor to outputthe preset maximum torque until the motor exits from the stalling condition. The safety and reliability of the electric vehicle system can be improved.
Description
Technical field [0001] The present invention relates to the technical field of automobiles, and in particular to a method and device for protecting and controlling motor blocking of electric vehicles and electric vehicles. Background technique [0002] In the case of electric vehicle locked-rotor, the locked-rotor current is 5-10 times the rated current, which makes the stator windings and switching devices heat up quickly, causing burnout. The current related technologies for motor stall protection schemes such as figure 1 As shown, the controller automatically determines whether the motor is in a locked-rotor state by detecting the commanded torque and speed. If the motor is in a locked-rotor state, maintain a constant current, that is, the torque for 2 seconds, and then determine whether the motor is in a locked-rotor state. Locked-rotor protection controls the current limit value below 10A to protect the motor and battery and save energy. This scheme adopts to limit the lock...
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IPC IPC(8): H02P29/028
Inventor 孙阳阳
Owner BORGWARD AUTOMOTIVE CHINA CO LTD